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# http://pyrocko.org - GPLv3 

# 

# The Pyrocko Developers, 21st Century 

# ---|P------/S----------~Lg---------- 

'''A Python interface to GMT.''' 

 

# This file is part of GmtPy (http://emolch.github.io/gmtpy/) 

# See there for copying and licensing information. 

 

from __future__ import print_function, absolute_import 

from builtins import zip, str as text 

import subprocess 

try: 

from StringIO import StringIO as BytesIO 

except ImportError: 

from io import BytesIO 

import re 

import os 

import sys 

import shutil 

from os.path import join as pjoin 

import tempfile 

import random 

import logging 

import math 

import numpy as num 

import copy 

from select import select 

from scipy.io import netcdf 

 

from pyrocko import ExternalProgramMissing 

 

find_bb = re.compile(br'%%BoundingBox:((\s+[-0-9]+){4})') 

find_hiresbb = re.compile(br'%%HiResBoundingBox:((\s+[-0-9.]+){4})') 

 

 

encoding_gmt_to_python = { 

'isolatin1+': 'iso-8859-1', 

'standard+': 'ascii', 

'isolatin1': 'iso-8859-1', 

'standard': 'ascii'} 

 

for i in range(1, 11): 

encoding_gmt_to_python['iso-8859-%i' % i] = 'iso-8859-%i' % i 

 

 

def have_gmt(): 

try: 

get_gmt_installation('newest') 

return True 

 

except GMTInstallationProblem: 

return False 

 

 

def check_have_gmt(): 

if not have_gmt(): 

raise ExternalProgramMissing('GMT is not installed or cannot be found') 

 

 

def have_pixmaptools(): 

for prog in [['pdftocairo'], ['convert'], ['gs', '-h']]: 

try: 

p = subprocess.Popen( 

prog, 

stdout=subprocess.PIPE, stderr=subprocess.PIPE) 

 

(stdout, stderr) = p.communicate() 

 

except OSError: 

return False 

 

return True 

 

 

class GmtPyError(Exception): 

pass 

 

 

class GMTError(GmtPyError): 

pass 

 

 

class GMTInstallationProblem(GmtPyError): 

pass 

 

 

def convert_graph(in_filename, out_filename, resolution=75., oversample=2., 

width=None, height=None, size=None): 

 

_, tmp_filename_base = tempfile.mkstemp() 

 

try: 

if out_filename.endswith('.svg'): 

fmt_arg = '-svg' 

tmp_filename = tmp_filename_base 

oversample = 1.0 

else: 

fmt_arg = '-png' 

tmp_filename = tmp_filename_base + '-1.png' 

 

if size is not None: 

scale_args = ['-scale-to', '%i' % int(round(size*oversample))] 

elif width is not None: 

scale_args = ['-scale-to-x', '%i' % int(round(width*oversample))] 

elif height is not None: 

scale_args = ['-scale-to-y', '%i' % int(round(height*oversample))] 

else: 

scale_args = ['-r', '%i' % int(round(resolution * oversample))] 

 

try: 

subprocess.check_call( 

['pdftocairo'] + scale_args + 

[fmt_arg, in_filename, tmp_filename_base]) 

except OSError as e: 

raise GmtPyError( 

'Cannot start `pdftocairo`, is it installed? (%s)' % str(e)) 

 

if oversample > 1.: 

try: 

subprocess.check_call([ 

'convert', 

tmp_filename, 

'-resize', '%i%%' % int(round(100.0/oversample)), 

out_filename]) 

except OSError as e: 

raise GmtPyError( 

'Cannot start `convert`, is it installed? (%s)' % str(e)) 

 

else: 

if out_filename.endswith('.png') or out_filename.endswith('.svg'): 

shutil.move(tmp_filename, out_filename) 

else: 

try: 

subprocess.check_call( 

['convert', tmp_filename, out_filename]) 

except Exception as e: 

raise GmtPyError( 

'Cannot start `convert`, is it installed? (%s)' 

% str(e)) 

 

except Exception: 

raise 

 

finally: 

if os.path.exists(tmp_filename_base): 

os.remove(tmp_filename_base) 

 

if os.path.exists(tmp_filename): 

os.remove(tmp_filename) 

 

 

def get_bbox(s): 

for pat in [find_hiresbb, find_bb]: 

m = pat.search(s) 

if m: 

bb = [float(x) for x in m.group(1).split()] 

return bb 

 

raise GmtPyError('Cannot find bbox') 

 

 

def replace_bbox(bbox, *args): 

 

def repl(m): 

if m.group(1): 

return ('%%HiResBoundingBox: ' + ' '.join( 

'%.3f' % float(x) for x in bbox)).encode('ascii') 

else: 

return ('%%%%BoundingBox: %i %i %i %i' % ( 

int(math.floor(bbox[0])), 

int(math.floor(bbox[1])), 

int(math.ceil(bbox[2])), 

int(math.ceil(bbox[3])))).encode('ascii') 

 

pat = re.compile(br'%%(HiRes)?BoundingBox:((\s+[0-9.]+){4})') 

if len(args) == 1: 

s = args[0] 

return pat.sub(repl, s) 

 

else: 

fin, fout = args 

nn = 0 

for line in fin: 

line, n = pat.subn(repl, line) 

nn += n 

fout.write(line) 

if nn == 2: 

break 

 

if nn == 2: 

for line in fin: 

fout.write(line) 

 

 

def escape_shell_arg(s): 

'''This function should be used for debugging output only - it could be 

insecure.''' 

 

if re.search(r'[^a-zA-Z0-9._/=-]', s): 

return "'" + s.replace("'", "'\\''") + "'" 

else: 

return s 

 

 

def escape_shell_args(args): 

'''This function should be used for debugging output only - it could be 

insecure.''' 

 

return ' '.join([escape_shell_arg(x) for x in args]) 

 

 

golden_ratio = 1.61803 

 

# units in points 

_units = { 

'i': 72., 

'c': 72./2.54, 

'm': 72.*100./2.54, 

'p': 1.} 

 

inch = _units['i'] 

cm = _units['c'] 

 

# some awsome colors 

tango_colors = { 

'butter1': (252, 233, 79), 

'butter2': (237, 212, 0), 

'butter3': (196, 160, 0), 

'chameleon1': (138, 226, 52), 

'chameleon2': (115, 210, 22), 

'chameleon3': (78, 154, 6), 

'orange1': (252, 175, 62), 

'orange2': (245, 121, 0), 

'orange3': (206, 92, 0), 

'skyblue1': (114, 159, 207), 

'skyblue2': (52, 101, 164), 

'skyblue3': (32, 74, 135), 

'plum1': (173, 127, 168), 

'plum2': (117, 80, 123), 

'plum3': (92, 53, 102), 

'chocolate1': (233, 185, 110), 

'chocolate2': (193, 125, 17), 

'chocolate3': (143, 89, 2), 

'scarletred1': (239, 41, 41), 

'scarletred2': (204, 0, 0), 

'scarletred3': (164, 0, 0), 

'aluminium1': (238, 238, 236), 

'aluminium2': (211, 215, 207), 

'aluminium3': (186, 189, 182), 

'aluminium4': (136, 138, 133), 

'aluminium5': (85, 87, 83), 

'aluminium6': (46, 52, 54) 

} 

 

graph_colors = [tango_colors[_x] for _x in ( 

'scarletred2', 'skyblue3', 'chameleon3', 'orange2', 'plum2', 'chocolate2', 

'butter2')] 

 

 

def color(x=None): 

'''Generate a string for GMT option arguments expecting a color. 

 

If ``x`` is None, a random color is returned. If it is an integer, the 

corresponding ``gmtpy.graph_colors[x]`` or black returned. If it is a 

string and the corresponding ``gmtpy.tango_colors[x]`` exists, this is 

returned, or the string is passed through. If ``x`` is a tuple, it is 

transformed into the string form which GMT expects. 

''' 

 

if x is None: 

return '%i/%i/%i' % tuple(random.randint(0, 255) for _ in 'rgb') 

 

if isinstance(x, int): 

if 0 <= x < len(graph_colors): 

return '%i/%i/%i' % graph_colors[x] 

else: 

return '0/0/0' 

 

elif isinstance(x, str): 

if x in tango_colors: 

return '%i/%i/%i' % tango_colors[x] 

else: 

return x 

 

return '%i/%i/%i' % x 

 

 

def color_tup(x=None): 

if x is None: 

return tuple([random.randint(0, 255) for _x in 'rgb']) 

 

if isinstance(x, int): 

if 0 <= x < len(graph_colors): 

return graph_colors[x] 

else: 

return (0, 0, 0) 

 

elif isinstance(x, str): 

if x in tango_colors: 

return tango_colors[x] 

 

return x 

 

 

_gmt_installations = {} 

 

# Set fixed installation(s) to use... 

# (use this, if you want to use different GMT versions simultaneously.) 

 

# _gmt_installations['4.2.1'] = {'home': '/sw/etch-ia32/gmt-4.2.1', 

# 'bin': '/sw/etch-ia32/gmt-4.2.1/bin'} 

# _gmt_installations['4.3.0'] = {'home': '/sw/etch-ia32/gmt-4.3.0', 

# 'bin': '/sw/etch-ia32/gmt-4.3.0/bin'} 

# _gmt_installations['4.3.1'] = {'home': '/sw/share/gmt', 

# 'bin': '/sw/bin' } 

 

# ... or let GmtPy autodetect GMT via $PATH and $GMTHOME 

 

 

def key_version(a): 

a = a.split('_')[0] # get rid of revision id 

return [int(x) for x in a.split('.')] 

 

 

def newest_installed_gmt_version(): 

return sorted(_gmt_installations.keys(), key=key_version)[-1] 

 

 

def all_installed_gmt_versions(): 

return sorted(_gmt_installations.keys(), key=key_version) 

 

 

# To have consistent defaults, they are hardcoded here and should not be 

# changed. 

 

_gmt_defaults_by_version = {} 

_gmt_defaults_by_version['4.2.1'] = r''' 

# 

# GMT-SYSTEM 4.2.1 Defaults file 

# 

#-------- Plot Media Parameters ------------- 

PAGE_COLOR = 255/255/255 

PAGE_ORIENTATION = portrait 

PAPER_MEDIA = a4+ 

#-------- Basemap Annotation Parameters ------ 

ANNOT_MIN_ANGLE = 20 

ANNOT_MIN_SPACING = 0 

ANNOT_FONT_PRIMARY = Helvetica 

ANNOT_FONT_SIZE = 12p 

ANNOT_OFFSET_PRIMARY = 0.075i 

ANNOT_FONT_SECONDARY = Helvetica 

ANNOT_FONT_SIZE_SECONDARY = 16p 

ANNOT_OFFSET_SECONDARY = 0.075i 

DEGREE_SYMBOL = ring 

HEADER_FONT = Helvetica 

HEADER_FONT_SIZE = 36p 

HEADER_OFFSET = 0.1875i 

LABEL_FONT = Helvetica 

LABEL_FONT_SIZE = 14p 

LABEL_OFFSET = 0.1125i 

OBLIQUE_ANNOTATION = 1 

PLOT_CLOCK_FORMAT = hh:mm:ss 

PLOT_DATE_FORMAT = yyyy-mm-dd 

PLOT_DEGREE_FORMAT = +ddd:mm:ss 

Y_AXIS_TYPE = hor_text 

#-------- Basemap Layout Parameters --------- 

BASEMAP_AXES = WESN 

BASEMAP_FRAME_RGB = 0/0/0 

BASEMAP_TYPE = plain 

FRAME_PEN = 1.25p 

FRAME_WIDTH = 0.075i 

GRID_CROSS_SIZE_PRIMARY = 0i 

GRID_CROSS_SIZE_SECONDARY = 0i 

GRID_PEN_PRIMARY = 0.25p 

GRID_PEN_SECONDARY = 0.5p 

MAP_SCALE_HEIGHT = 0.075i 

TICK_LENGTH = 0.075i 

POLAR_CAP = 85/90 

TICK_PEN = 0.5p 

X_AXIS_LENGTH = 9i 

Y_AXIS_LENGTH = 6i 

X_ORIGIN = 1i 

Y_ORIGIN = 1i 

UNIX_TIME = FALSE 

UNIX_TIME_POS = -0.75i/-0.75i 

#-------- Color System Parameters ----------- 

COLOR_BACKGROUND = 0/0/0 

COLOR_FOREGROUND = 255/255/255 

COLOR_NAN = 128/128/128 

COLOR_IMAGE = adobe 

COLOR_MODEL = rgb 

HSV_MIN_SATURATION = 1 

HSV_MAX_SATURATION = 0.1 

HSV_MIN_VALUE = 0.3 

HSV_MAX_VALUE = 1 

#-------- PostScript Parameters ------------- 

CHAR_ENCODING = ISOLatin1+ 

DOTS_PR_INCH = 300 

N_COPIES = 1 

PS_COLOR = rgb 

PS_IMAGE_COMPRESS = none 

PS_IMAGE_FORMAT = ascii 

PS_LINE_CAP = round 

PS_LINE_JOIN = miter 

PS_MITER_LIMIT = 35 

PS_VERBOSE = FALSE 

GLOBAL_X_SCALE = 1 

GLOBAL_Y_SCALE = 1 

#-------- I/O Format Parameters ------------- 

D_FORMAT = %lg 

FIELD_DELIMITER = tab 

GRIDFILE_SHORTHAND = FALSE 

GRID_FORMAT = nf 

INPUT_CLOCK_FORMAT = hh:mm:ss 

INPUT_DATE_FORMAT = yyyy-mm-dd 

IO_HEADER = FALSE 

N_HEADER_RECS = 1 

OUTPUT_CLOCK_FORMAT = hh:mm:ss 

OUTPUT_DATE_FORMAT = yyyy-mm-dd 

OUTPUT_DEGREE_FORMAT = +D 

XY_TOGGLE = FALSE 

#-------- Projection Parameters ------------- 

ELLIPSOID = WGS-84 

MAP_SCALE_FACTOR = default 

MEASURE_UNIT = inch 

#-------- Calendar/Time Parameters ---------- 

TIME_FORMAT_PRIMARY = full 

TIME_FORMAT_SECONDARY = full 

TIME_EPOCH = 2000-01-01T00:00:00 

TIME_IS_INTERVAL = OFF 

TIME_INTERVAL_FRACTION = 0.5 

TIME_LANGUAGE = us 

TIME_SYSTEM = other 

TIME_UNIT = d 

TIME_WEEK_START = Sunday 

Y2K_OFFSET_YEAR = 1950 

#-------- Miscellaneous Parameters ---------- 

HISTORY = TRUE 

INTERPOLANT = akima 

LINE_STEP = 0.01i 

VECTOR_SHAPE = 0 

VERBOSE = FALSE''' 

 

_gmt_defaults_by_version['4.3.0'] = r''' 

# 

# GMT-SYSTEM 4.3.0 Defaults file 

# 

#-------- Plot Media Parameters ------------- 

PAGE_COLOR = 255/255/255 

PAGE_ORIENTATION = portrait 

PAPER_MEDIA = a4+ 

#-------- Basemap Annotation Parameters ------ 

ANNOT_MIN_ANGLE = 20 

ANNOT_MIN_SPACING = 0 

ANNOT_FONT_PRIMARY = Helvetica 

ANNOT_FONT_SIZE_PRIMARY = 12p 

ANNOT_OFFSET_PRIMARY = 0.075i 

ANNOT_FONT_SECONDARY = Helvetica 

ANNOT_FONT_SIZE_SECONDARY = 16p 

ANNOT_OFFSET_SECONDARY = 0.075i 

DEGREE_SYMBOL = ring 

HEADER_FONT = Helvetica 

HEADER_FONT_SIZE = 36p 

HEADER_OFFSET = 0.1875i 

LABEL_FONT = Helvetica 

LABEL_FONT_SIZE = 14p 

LABEL_OFFSET = 0.1125i 

OBLIQUE_ANNOTATION = 1 

PLOT_CLOCK_FORMAT = hh:mm:ss 

PLOT_DATE_FORMAT = yyyy-mm-dd 

PLOT_DEGREE_FORMAT = +ddd:mm:ss 

Y_AXIS_TYPE = hor_text 

#-------- Basemap Layout Parameters --------- 

BASEMAP_AXES = WESN 

BASEMAP_FRAME_RGB = 0/0/0 

BASEMAP_TYPE = plain 

FRAME_PEN = 1.25p 

FRAME_WIDTH = 0.075i 

GRID_CROSS_SIZE_PRIMARY = 0i 

GRID_PEN_PRIMARY = 0.25p 

GRID_CROSS_SIZE_SECONDARY = 0i 

GRID_PEN_SECONDARY = 0.5p 

MAP_SCALE_HEIGHT = 0.075i 

POLAR_CAP = 85/90 

TICK_LENGTH = 0.075i 

TICK_PEN = 0.5p 

X_AXIS_LENGTH = 9i 

Y_AXIS_LENGTH = 6i 

X_ORIGIN = 1i 

Y_ORIGIN = 1i 

UNIX_TIME = FALSE 

UNIX_TIME_POS = BL/-0.75i/-0.75i 

UNIX_TIME_FORMAT = %Y %b %d %H:%M:%S 

#-------- Color System Parameters ----------- 

COLOR_BACKGROUND = 0/0/0 

COLOR_FOREGROUND = 255/255/255 

COLOR_NAN = 128/128/128 

COLOR_IMAGE = adobe 

COLOR_MODEL = rgb 

HSV_MIN_SATURATION = 1 

HSV_MAX_SATURATION = 0.1 

HSV_MIN_VALUE = 0.3 

HSV_MAX_VALUE = 1 

#-------- PostScript Parameters ------------- 

CHAR_ENCODING = ISOLatin1+ 

DOTS_PR_INCH = 300 

N_COPIES = 1 

PS_COLOR = rgb 

PS_IMAGE_COMPRESS = none 

PS_IMAGE_FORMAT = ascii 

PS_LINE_CAP = round 

PS_LINE_JOIN = miter 

PS_MITER_LIMIT = 35 

PS_VERBOSE = FALSE 

GLOBAL_X_SCALE = 1 

GLOBAL_Y_SCALE = 1 

#-------- I/O Format Parameters ------------- 

D_FORMAT = %lg 

FIELD_DELIMITER = tab 

GRIDFILE_SHORTHAND = FALSE 

GRID_FORMAT = nf 

INPUT_CLOCK_FORMAT = hh:mm:ss 

INPUT_DATE_FORMAT = yyyy-mm-dd 

IO_HEADER = FALSE 

N_HEADER_RECS = 1 

OUTPUT_CLOCK_FORMAT = hh:mm:ss 

OUTPUT_DATE_FORMAT = yyyy-mm-dd 

OUTPUT_DEGREE_FORMAT = +D 

XY_TOGGLE = FALSE 

#-------- Projection Parameters ------------- 

ELLIPSOID = WGS-84 

MAP_SCALE_FACTOR = default 

MEASURE_UNIT = inch 

#-------- Calendar/Time Parameters ---------- 

TIME_FORMAT_PRIMARY = full 

TIME_FORMAT_SECONDARY = full 

TIME_EPOCH = 2000-01-01T00:00:00 

TIME_IS_INTERVAL = OFF 

TIME_INTERVAL_FRACTION = 0.5 

TIME_LANGUAGE = us 

TIME_UNIT = d 

TIME_WEEK_START = Sunday 

Y2K_OFFSET_YEAR = 1950 

#-------- Miscellaneous Parameters ---------- 

HISTORY = TRUE 

INTERPOLANT = akima 

LINE_STEP = 0.01i 

VECTOR_SHAPE = 0 

VERBOSE = FALSE''' 

 

 

_gmt_defaults_by_version['4.3.1'] = r''' 

# 

# GMT-SYSTEM 4.3.1 Defaults file 

# 

#-------- Plot Media Parameters ------------- 

PAGE_COLOR = 255/255/255 

PAGE_ORIENTATION = portrait 

PAPER_MEDIA = a4+ 

#-------- Basemap Annotation Parameters ------ 

ANNOT_MIN_ANGLE = 20 

ANNOT_MIN_SPACING = 0 

ANNOT_FONT_PRIMARY = Helvetica 

ANNOT_FONT_SIZE_PRIMARY = 12p 

ANNOT_OFFSET_PRIMARY = 0.075i 

ANNOT_FONT_SECONDARY = Helvetica 

ANNOT_FONT_SIZE_SECONDARY = 16p 

ANNOT_OFFSET_SECONDARY = 0.075i 

DEGREE_SYMBOL = ring 

HEADER_FONT = Helvetica 

HEADER_FONT_SIZE = 36p 

HEADER_OFFSET = 0.1875i 

LABEL_FONT = Helvetica 

LABEL_FONT_SIZE = 14p 

LABEL_OFFSET = 0.1125i 

OBLIQUE_ANNOTATION = 1 

PLOT_CLOCK_FORMAT = hh:mm:ss 

PLOT_DATE_FORMAT = yyyy-mm-dd 

PLOT_DEGREE_FORMAT = +ddd:mm:ss 

Y_AXIS_TYPE = hor_text 

#-------- Basemap Layout Parameters --------- 

BASEMAP_AXES = WESN 

BASEMAP_FRAME_RGB = 0/0/0 

BASEMAP_TYPE = plain 

FRAME_PEN = 1.25p 

FRAME_WIDTH = 0.075i 

GRID_CROSS_SIZE_PRIMARY = 0i 

GRID_PEN_PRIMARY = 0.25p 

GRID_CROSS_SIZE_SECONDARY = 0i 

GRID_PEN_SECONDARY = 0.5p 

MAP_SCALE_HEIGHT = 0.075i 

POLAR_CAP = 85/90 

TICK_LENGTH = 0.075i 

TICK_PEN = 0.5p 

X_AXIS_LENGTH = 9i 

Y_AXIS_LENGTH = 6i 

X_ORIGIN = 1i 

Y_ORIGIN = 1i 

UNIX_TIME = FALSE 

UNIX_TIME_POS = BL/-0.75i/-0.75i 

UNIX_TIME_FORMAT = %Y %b %d %H:%M:%S 

#-------- Color System Parameters ----------- 

COLOR_BACKGROUND = 0/0/0 

COLOR_FOREGROUND = 255/255/255 

COLOR_NAN = 128/128/128 

COLOR_IMAGE = adobe 

COLOR_MODEL = rgb 

HSV_MIN_SATURATION = 1 

HSV_MAX_SATURATION = 0.1 

HSV_MIN_VALUE = 0.3 

HSV_MAX_VALUE = 1 

#-------- PostScript Parameters ------------- 

CHAR_ENCODING = ISOLatin1+ 

DOTS_PR_INCH = 300 

N_COPIES = 1 

PS_COLOR = rgb 

PS_IMAGE_COMPRESS = none 

PS_IMAGE_FORMAT = ascii 

PS_LINE_CAP = round 

PS_LINE_JOIN = miter 

PS_MITER_LIMIT = 35 

PS_VERBOSE = FALSE 

GLOBAL_X_SCALE = 1 

GLOBAL_Y_SCALE = 1 

#-------- I/O Format Parameters ------------- 

D_FORMAT = %lg 

FIELD_DELIMITER = tab 

GRIDFILE_SHORTHAND = FALSE 

GRID_FORMAT = nf 

INPUT_CLOCK_FORMAT = hh:mm:ss 

INPUT_DATE_FORMAT = yyyy-mm-dd 

IO_HEADER = FALSE 

N_HEADER_RECS = 1 

OUTPUT_CLOCK_FORMAT = hh:mm:ss 

OUTPUT_DATE_FORMAT = yyyy-mm-dd 

OUTPUT_DEGREE_FORMAT = +D 

XY_TOGGLE = FALSE 

#-------- Projection Parameters ------------- 

ELLIPSOID = WGS-84 

MAP_SCALE_FACTOR = default 

MEASURE_UNIT = inch 

#-------- Calendar/Time Parameters ---------- 

TIME_FORMAT_PRIMARY = full 

TIME_FORMAT_SECONDARY = full 

TIME_EPOCH = 2000-01-01T00:00:00 

TIME_IS_INTERVAL = OFF 

TIME_INTERVAL_FRACTION = 0.5 

TIME_LANGUAGE = us 

TIME_UNIT = d 

TIME_WEEK_START = Sunday 

Y2K_OFFSET_YEAR = 1950 

#-------- Miscellaneous Parameters ---------- 

HISTORY = TRUE 

INTERPOLANT = akima 

LINE_STEP = 0.01i 

VECTOR_SHAPE = 0 

VERBOSE = FALSE''' 

 

 

_gmt_defaults_by_version['4.4.0'] = r''' 

# 

# GMT-SYSTEM 4.4.0 [64-bit] Defaults file 

# 

#-------- Plot Media Parameters ------------- 

PAGE_COLOR = 255/255/255 

PAGE_ORIENTATION = portrait 

PAPER_MEDIA = a4+ 

#-------- Basemap Annotation Parameters ------ 

ANNOT_MIN_ANGLE = 20 

ANNOT_MIN_SPACING = 0 

ANNOT_FONT_PRIMARY = Helvetica 

ANNOT_FONT_SIZE_PRIMARY = 14p 

ANNOT_OFFSET_PRIMARY = 0.075i 

ANNOT_FONT_SECONDARY = Helvetica 

ANNOT_FONT_SIZE_SECONDARY = 16p 

ANNOT_OFFSET_SECONDARY = 0.075i 

DEGREE_SYMBOL = ring 

HEADER_FONT = Helvetica 

HEADER_FONT_SIZE = 36p 

HEADER_OFFSET = 0.1875i 

LABEL_FONT = Helvetica 

LABEL_FONT_SIZE = 14p 

LABEL_OFFSET = 0.1125i 

OBLIQUE_ANNOTATION = 1 

PLOT_CLOCK_FORMAT = hh:mm:ss 

PLOT_DATE_FORMAT = yyyy-mm-dd 

PLOT_DEGREE_FORMAT = +ddd:mm:ss 

Y_AXIS_TYPE = hor_text 

#-------- Basemap Layout Parameters --------- 

BASEMAP_AXES = WESN 

BASEMAP_FRAME_RGB = 0/0/0 

BASEMAP_TYPE = plain 

FRAME_PEN = 1.25p 

FRAME_WIDTH = 0.075i 

GRID_CROSS_SIZE_PRIMARY = 0i 

GRID_PEN_PRIMARY = 0.25p 

GRID_CROSS_SIZE_SECONDARY = 0i 

GRID_PEN_SECONDARY = 0.5p 

MAP_SCALE_HEIGHT = 0.075i 

POLAR_CAP = 85/90 

TICK_LENGTH = 0.075i 

TICK_PEN = 0.5p 

X_AXIS_LENGTH = 9i 

Y_AXIS_LENGTH = 6i 

X_ORIGIN = 1i 

Y_ORIGIN = 1i 

UNIX_TIME = FALSE 

UNIX_TIME_POS = BL/-0.75i/-0.75i 

UNIX_TIME_FORMAT = %Y %b %d %H:%M:%S 

#-------- Color System Parameters ----------- 

COLOR_BACKGROUND = 0/0/0 

COLOR_FOREGROUND = 255/255/255 

COLOR_NAN = 128/128/128 

COLOR_IMAGE = adobe 

COLOR_MODEL = rgb 

HSV_MIN_SATURATION = 1 

HSV_MAX_SATURATION = 0.1 

HSV_MIN_VALUE = 0.3 

HSV_MAX_VALUE = 1 

#-------- PostScript Parameters ------------- 

CHAR_ENCODING = ISOLatin1+ 

DOTS_PR_INCH = 300 

N_COPIES = 1 

PS_COLOR = rgb 

PS_IMAGE_COMPRESS = lzw 

PS_IMAGE_FORMAT = ascii 

PS_LINE_CAP = round 

PS_LINE_JOIN = miter 

PS_MITER_LIMIT = 35 

PS_VERBOSE = FALSE 

GLOBAL_X_SCALE = 1 

GLOBAL_Y_SCALE = 1 

#-------- I/O Format Parameters ------------- 

D_FORMAT = %lg 

FIELD_DELIMITER = tab 

GRIDFILE_SHORTHAND = FALSE 

GRID_FORMAT = nf 

INPUT_CLOCK_FORMAT = hh:mm:ss 

INPUT_DATE_FORMAT = yyyy-mm-dd 

IO_HEADER = FALSE 

N_HEADER_RECS = 1 

OUTPUT_CLOCK_FORMAT = hh:mm:ss 

OUTPUT_DATE_FORMAT = yyyy-mm-dd 

OUTPUT_DEGREE_FORMAT = +D 

XY_TOGGLE = FALSE 

#-------- Projection Parameters ------------- 

ELLIPSOID = WGS-84 

MAP_SCALE_FACTOR = default 

MEASURE_UNIT = inch 

#-------- Calendar/Time Parameters ---------- 

TIME_FORMAT_PRIMARY = full 

TIME_FORMAT_SECONDARY = full 

TIME_EPOCH = 2000-01-01T00:00:00 

TIME_IS_INTERVAL = OFF 

TIME_INTERVAL_FRACTION = 0.5 

TIME_LANGUAGE = us 

TIME_UNIT = d 

TIME_WEEK_START = Sunday 

Y2K_OFFSET_YEAR = 1950 

#-------- Miscellaneous Parameters ---------- 

HISTORY = TRUE 

INTERPOLANT = akima 

LINE_STEP = 0.01i 

VECTOR_SHAPE = 0 

VERBOSE = FALSE 

''' 

 

_gmt_defaults_by_version['4.5.2'] = r''' 

# 

# GMT-SYSTEM 4.5.2 [64-bit] Defaults file 

# 

#-------- Plot Media Parameters ------------- 

PAGE_COLOR = white 

PAGE_ORIENTATION = portrait 

PAPER_MEDIA = a4+ 

#-------- Basemap Annotation Parameters ------ 

ANNOT_MIN_ANGLE = 20 

ANNOT_MIN_SPACING = 0 

ANNOT_FONT_PRIMARY = Helvetica 

ANNOT_FONT_SIZE_PRIMARY = 14p 

ANNOT_OFFSET_PRIMARY = 0.075i 

ANNOT_FONT_SECONDARY = Helvetica 

ANNOT_FONT_SIZE_SECONDARY = 16p 

ANNOT_OFFSET_SECONDARY = 0.075i 

DEGREE_SYMBOL = ring 

HEADER_FONT = Helvetica 

HEADER_FONT_SIZE = 36p 

HEADER_OFFSET = 0.1875i 

LABEL_FONT = Helvetica 

LABEL_FONT_SIZE = 14p 

LABEL_OFFSET = 0.1125i 

OBLIQUE_ANNOTATION = 1 

PLOT_CLOCK_FORMAT = hh:mm:ss 

PLOT_DATE_FORMAT = yyyy-mm-dd 

PLOT_DEGREE_FORMAT = +ddd:mm:ss 

Y_AXIS_TYPE = hor_text 

#-------- Basemap Layout Parameters --------- 

BASEMAP_AXES = WESN 

BASEMAP_FRAME_RGB = black 

BASEMAP_TYPE = plain 

FRAME_PEN = 1.25p 

FRAME_WIDTH = 0.075i 

GRID_CROSS_SIZE_PRIMARY = 0i 

GRID_PEN_PRIMARY = 0.25p 

GRID_CROSS_SIZE_SECONDARY = 0i 

GRID_PEN_SECONDARY = 0.5p 

MAP_SCALE_HEIGHT = 0.075i 

POLAR_CAP = 85/90 

TICK_LENGTH = 0.075i 

TICK_PEN = 0.5p 

X_AXIS_LENGTH = 9i 

Y_AXIS_LENGTH = 6i 

X_ORIGIN = 1i 

Y_ORIGIN = 1i 

UNIX_TIME = FALSE 

UNIX_TIME_POS = BL/-0.75i/-0.75i 

UNIX_TIME_FORMAT = %Y %b %d %H:%M:%S 

#-------- Color System Parameters ----------- 

COLOR_BACKGROUND = black 

COLOR_FOREGROUND = white 

COLOR_NAN = 128 

COLOR_IMAGE = adobe 

COLOR_MODEL = rgb 

HSV_MIN_SATURATION = 1 

HSV_MAX_SATURATION = 0.1 

HSV_MIN_VALUE = 0.3 

HSV_MAX_VALUE = 1 

#-------- PostScript Parameters ------------- 

CHAR_ENCODING = ISOLatin1+ 

DOTS_PR_INCH = 300 

GLOBAL_X_SCALE = 1 

GLOBAL_Y_SCALE = 1 

N_COPIES = 1 

PS_COLOR = rgb 

PS_IMAGE_COMPRESS = lzw 

PS_IMAGE_FORMAT = ascii 

PS_LINE_CAP = round 

PS_LINE_JOIN = miter 

PS_MITER_LIMIT = 35 

PS_VERBOSE = FALSE 

TRANSPARENCY = 0 

#-------- I/O Format Parameters ------------- 

D_FORMAT = %.12lg 

FIELD_DELIMITER = tab 

GRIDFILE_FORMAT = nf 

GRIDFILE_SHORTHAND = FALSE 

INPUT_CLOCK_FORMAT = hh:mm:ss 

INPUT_DATE_FORMAT = yyyy-mm-dd 

IO_HEADER = FALSE 

N_HEADER_RECS = 1 

NAN_RECORDS = pass 

OUTPUT_CLOCK_FORMAT = hh:mm:ss 

OUTPUT_DATE_FORMAT = yyyy-mm-dd 

OUTPUT_DEGREE_FORMAT = D 

XY_TOGGLE = FALSE 

#-------- Projection Parameters ------------- 

ELLIPSOID = WGS-84 

MAP_SCALE_FACTOR = default 

MEASURE_UNIT = inch 

#-------- Calendar/Time Parameters ---------- 

TIME_FORMAT_PRIMARY = full 

TIME_FORMAT_SECONDARY = full 

TIME_EPOCH = 2000-01-01T00:00:00 

TIME_IS_INTERVAL = OFF 

TIME_INTERVAL_FRACTION = 0.5 

TIME_LANGUAGE = us 

TIME_UNIT = d 

TIME_WEEK_START = Sunday 

Y2K_OFFSET_YEAR = 1950 

#-------- Miscellaneous Parameters ---------- 

HISTORY = TRUE 

INTERPOLANT = akima 

LINE_STEP = 0.01i 

VECTOR_SHAPE = 0 

VERBOSE = FALSE 

''' 

 

_gmt_defaults_by_version['4.5.3'] = r''' 

# 

# GMT-SYSTEM 4.5.3 (CVS Jun 18 2010 10:56:07) [64-bit] Defaults file 

# 

#-------- Plot Media Parameters ------------- 

PAGE_COLOR = white 

PAGE_ORIENTATION = portrait 

PAPER_MEDIA = a4+ 

#-------- Basemap Annotation Parameters ------ 

ANNOT_MIN_ANGLE = 20 

ANNOT_MIN_SPACING = 0 

ANNOT_FONT_PRIMARY = Helvetica 

ANNOT_FONT_SIZE_PRIMARY = 14p 

ANNOT_OFFSET_PRIMARY = 0.075i 

ANNOT_FONT_SECONDARY = Helvetica 

ANNOT_FONT_SIZE_SECONDARY = 16p 

ANNOT_OFFSET_SECONDARY = 0.075i 

DEGREE_SYMBOL = ring 

HEADER_FONT = Helvetica 

HEADER_FONT_SIZE = 36p 

HEADER_OFFSET = 0.1875i 

LABEL_FONT = Helvetica 

LABEL_FONT_SIZE = 14p 

LABEL_OFFSET = 0.1125i 

OBLIQUE_ANNOTATION = 1 

PLOT_CLOCK_FORMAT = hh:mm:ss 

PLOT_DATE_FORMAT = yyyy-mm-dd 

PLOT_DEGREE_FORMAT = +ddd:mm:ss 

Y_AXIS_TYPE = hor_text 

#-------- Basemap Layout Parameters --------- 

BASEMAP_AXES = WESN 

BASEMAP_FRAME_RGB = black 

BASEMAP_TYPE = plain 

FRAME_PEN = 1.25p 

FRAME_WIDTH = 0.075i 

GRID_CROSS_SIZE_PRIMARY = 0i 

GRID_PEN_PRIMARY = 0.25p 

GRID_CROSS_SIZE_SECONDARY = 0i 

GRID_PEN_SECONDARY = 0.5p 

MAP_SCALE_HEIGHT = 0.075i 

POLAR_CAP = 85/90 

TICK_LENGTH = 0.075i 

TICK_PEN = 0.5p 

X_AXIS_LENGTH = 9i 

Y_AXIS_LENGTH = 6i 

X_ORIGIN = 1i 

Y_ORIGIN = 1i 

UNIX_TIME = FALSE 

UNIX_TIME_POS = BL/-0.75i/-0.75i 

UNIX_TIME_FORMAT = %Y %b %d %H:%M:%S 

#-------- Color System Parameters ----------- 

COLOR_BACKGROUND = black 

COLOR_FOREGROUND = white 

COLOR_NAN = 128 

COLOR_IMAGE = adobe 

COLOR_MODEL = rgb 

HSV_MIN_SATURATION = 1 

HSV_MAX_SATURATION = 0.1 

HSV_MIN_VALUE = 0.3 

HSV_MAX_VALUE = 1 

#-------- PostScript Parameters ------------- 

CHAR_ENCODING = ISOLatin1+ 

DOTS_PR_INCH = 300 

GLOBAL_X_SCALE = 1 

GLOBAL_Y_SCALE = 1 

N_COPIES = 1 

PS_COLOR = rgb 

PS_IMAGE_COMPRESS = lzw 

PS_IMAGE_FORMAT = ascii 

PS_LINE_CAP = round 

PS_LINE_JOIN = miter 

PS_MITER_LIMIT = 35 

PS_VERBOSE = FALSE 

TRANSPARENCY = 0 

#-------- I/O Format Parameters ------------- 

D_FORMAT = %.12lg 

FIELD_DELIMITER = tab 

GRIDFILE_FORMAT = nf 

GRIDFILE_SHORTHAND = FALSE 

INPUT_CLOCK_FORMAT = hh:mm:ss 

INPUT_DATE_FORMAT = yyyy-mm-dd 

IO_HEADER = FALSE 

N_HEADER_RECS = 1 

NAN_RECORDS = pass 

OUTPUT_CLOCK_FORMAT = hh:mm:ss 

OUTPUT_DATE_FORMAT = yyyy-mm-dd 

OUTPUT_DEGREE_FORMAT = D 

XY_TOGGLE = FALSE 

#-------- Projection Parameters ------------- 

ELLIPSOID = WGS-84 

MAP_SCALE_FACTOR = default 

MEASURE_UNIT = inch 

#-------- Calendar/Time Parameters ---------- 

TIME_FORMAT_PRIMARY = full 

TIME_FORMAT_SECONDARY = full 

TIME_EPOCH = 2000-01-01T00:00:00 

TIME_IS_INTERVAL = OFF 

TIME_INTERVAL_FRACTION = 0.5 

TIME_LANGUAGE = us 

TIME_UNIT = d 

TIME_WEEK_START = Sunday 

Y2K_OFFSET_YEAR = 1950 

#-------- Miscellaneous Parameters ---------- 

HISTORY = TRUE 

INTERPOLANT = akima 

LINE_STEP = 0.01i 

VECTOR_SHAPE = 0 

VERBOSE = FALSE 

''' 

 

_gmt_defaults_by_version['5.1.2'] = r''' 

# 

# GMT 5.1.2 Defaults file 

# vim:sw=8:ts=8:sts=8 

# $Revision: 13836 $ 

# $LastChangedDate: 2014-12-20 03:45:42 -1000 (Sat, 20 Dec 2014) $ 

# 

# COLOR Parameters 

# 

COLOR_BACKGROUND = black 

COLOR_FOREGROUND = white 

COLOR_NAN = 127.5 

COLOR_MODEL = none 

COLOR_HSV_MIN_S = 1 

COLOR_HSV_MAX_S = 0.1 

COLOR_HSV_MIN_V = 0.3 

COLOR_HSV_MAX_V = 1 

# 

# DIR Parameters 

# 

DIR_DATA = 

DIR_DCW = 

DIR_GSHHG = 

# 

# FONT Parameters 

# 

FONT_ANNOT_PRIMARY = 14p,Helvetica,black 

FONT_ANNOT_SECONDARY = 16p,Helvetica,black 

FONT_LABEL = 14p,Helvetica,black 

FONT_LOGO = 8p,Helvetica,black 

FONT_TITLE = 24p,Helvetica,black 

# 

# FORMAT Parameters 

# 

FORMAT_CLOCK_IN = hh:mm:ss 

FORMAT_CLOCK_OUT = hh:mm:ss 

FORMAT_CLOCK_MAP = hh:mm:ss 

FORMAT_DATE_IN = yyyy-mm-dd 

FORMAT_DATE_OUT = yyyy-mm-dd 

FORMAT_DATE_MAP = yyyy-mm-dd 

FORMAT_GEO_OUT = D 

FORMAT_GEO_MAP = ddd:mm:ss 

FORMAT_FLOAT_OUT = %.12g 

FORMAT_FLOAT_MAP = %.12g 

FORMAT_TIME_PRIMARY_MAP = full 

FORMAT_TIME_SECONDARY_MAP = full 

FORMAT_TIME_STAMP = %Y %b %d %H:%M:%S 

# 

# GMT Miscellaneous Parameters 

# 

GMT_COMPATIBILITY = 4 

GMT_CUSTOM_LIBS = 

GMT_EXTRAPOLATE_VAL = NaN 

GMT_FFT = auto 

GMT_HISTORY = true 

GMT_INTERPOLANT = akima 

GMT_TRIANGULATE = Shewchuk 

GMT_VERBOSE = compat 

GMT_LANGUAGE = us 

# 

# I/O Parameters 

# 

IO_COL_SEPARATOR = tab 

IO_GRIDFILE_FORMAT = nf 

IO_GRIDFILE_SHORTHAND = false 

IO_HEADER = false 

IO_N_HEADER_RECS = 0 

IO_NAN_RECORDS = pass 

IO_NC4_CHUNK_SIZE = auto 

IO_NC4_DEFLATION_LEVEL = 3 

IO_LONLAT_TOGGLE = false 

IO_SEGMENT_MARKER = > 

# 

# MAP Parameters 

# 

MAP_ANNOT_MIN_ANGLE = 20 

MAP_ANNOT_MIN_SPACING = 0p 

MAP_ANNOT_OBLIQUE = 1 

MAP_ANNOT_OFFSET_PRIMARY = 0.075i 

MAP_ANNOT_OFFSET_SECONDARY = 0.075i 

MAP_ANNOT_ORTHO = we 

MAP_DEFAULT_PEN = default,black 

MAP_DEGREE_SYMBOL = ring 

MAP_FRAME_AXES = WESNZ 

MAP_FRAME_PEN = thicker,black 

MAP_FRAME_TYPE = fancy 

MAP_FRAME_WIDTH = 5p 

MAP_GRID_CROSS_SIZE_PRIMARY = 0p 

MAP_GRID_CROSS_SIZE_SECONDARY = 0p 

MAP_GRID_PEN_PRIMARY = default,black 

MAP_GRID_PEN_SECONDARY = thinner,black 

MAP_LABEL_OFFSET = 0.1944i 

MAP_LINE_STEP = 0.75p 

MAP_LOGO = false 

MAP_LOGO_POS = BL/-54p/-54p 

MAP_ORIGIN_X = 1i 

MAP_ORIGIN_Y = 1i 

MAP_POLAR_CAP = 85/90 

MAP_SCALE_HEIGHT = 5p 

MAP_TICK_LENGTH_PRIMARY = 5p/2.5p 

MAP_TICK_LENGTH_SECONDARY = 15p/3.75p 

MAP_TICK_PEN_PRIMARY = thinner,black 

MAP_TICK_PEN_SECONDARY = thinner,black 

MAP_TITLE_OFFSET = 14p 

MAP_VECTOR_SHAPE = 0 

# 

# Projection Parameters 

# 

PROJ_AUX_LATITUDE = authalic 

PROJ_ELLIPSOID = WGS-84 

PROJ_LENGTH_UNIT = cm 

PROJ_MEAN_RADIUS = authalic 

PROJ_SCALE_FACTOR = default 

# 

# PostScript Parameters 

# 

PS_CHAR_ENCODING = ISOLatin1+ 

PS_COLOR_MODEL = rgb 

PS_COMMENTS = false 

PS_IMAGE_COMPRESS = deflate,5 

PS_LINE_CAP = butt 

PS_LINE_JOIN = miter 

PS_MITER_LIMIT = 35 

PS_MEDIA = a4 

PS_PAGE_COLOR = white 

PS_PAGE_ORIENTATION = portrait 

PS_SCALE_X = 1 

PS_SCALE_Y = 1 

PS_TRANSPARENCY = Normal 

# 

# Calendar/Time Parameters 

# 

TIME_EPOCH = 1970-01-01T00:00:00 

TIME_IS_INTERVAL = off 

TIME_INTERVAL_FRACTION = 0.5 

TIME_UNIT = s 

TIME_WEEK_START = Monday 

TIME_Y2K_OFFSET_YEAR = 1950 

''' 

 

 

def get_gmt_version(gmtdefaultsbinary, gmthomedir=None): 

args = [gmtdefaultsbinary] 

 

environ = os.environ.copy() 

environ['GMTHOME'] = gmthomedir or '' 

 

p = subprocess.Popen( 

args, 

stdout=subprocess.PIPE, 

stderr=subprocess.PIPE, 

env=environ) 

 

(stdout, stderr) = p.communicate() 

m = re.search(br'(\d+(\.\d+)*)', stderr) \ 

or re.search(br'# GMT (\d+(\.\d+)*)', stdout) 

 

if not m: 

raise GMTInstallationProblem( 

"Can't extract version number from output of %s" 

% gmtdefaultsbinary) 

 

return str(m.group(1).decode('ascii')) 

 

 

def detect_gmt_installations(): 

 

installations = {} 

errmesses = [] 

 

# GMT 4.x: 

try: 

p = subprocess.Popen( 

['GMT'], 

stdout=subprocess.PIPE, 

stderr=subprocess.PIPE) 

 

(stdout, stderr) = p.communicate() 

 

m = re.search(br'Version\s+(\d+(\.\d+)*)', stderr, re.M) 

if not m: 

raise GMTInstallationProblem( 

"Can't version number from output of GMT") 

 

version = str(m.group(1).decode('ascii')) 

if version[0] != '5': 

 

m = re.search(br'^\s+executables\s+(.+)$', stderr, re.M) 

if not m: 

raise GMTInstallationProblem( 

"Can't extract executables dir from output of GMT") 

 

gmtbin = str(m.group(1).decode('ascii')) 

 

m = re.search(br'^\s+shared data\s+(.+)$', stderr, re.M) 

if not m: 

raise GMTInstallationProblem( 

"Can't extract shared dir from output of GMT") 

 

gmtshare = str(m.group(1).decode('ascii')) 

if not gmtshare.endswith('/share'): 

raise GMTInstallationProblem( 

"Can't determine GMTHOME from output of GMT") 

 

gmthome = gmtshare[:-6] 

 

installations[version] = { 

'home': gmthome, 

'bin': gmtbin} 

 

except OSError as e: 

errmesses.append(('GMT', str(e))) 

 

try: 

version = str(subprocess.check_output( 

['gmt', '--version']).strip().decode('ascii')).split('_')[0] 

gmtbin = str(subprocess.check_output( 

['gmt', '--show-bindir']).strip().decode('ascii')) 

installations[version] = { 

'bin': gmtbin} 

 

except (OSError, subprocess.CalledProcessError) as e: 

errmesses.append(('gmt', str(e))) 

 

if not installations: 

s = [] 

for (progname, errmess) in errmesses: 

s.append('Cannot start "%s" executable: %s' % (progname, errmess)) 

 

raise GMTInstallationProblem(', '.join(s)) 

 

return installations 

 

 

def appropriate_defaults_version(version): 

avails = sorted(_gmt_defaults_by_version.keys(), key=key_version) 

for iavail, avail in enumerate(avails): 

if key_version(version) == key_version(avail): 

return version 

 

elif key_version(version) < key_version(avail): 

return avails[max(0, iavail-1)] 

 

return avails[-1] 

 

 

def gmt_default_config(version): 

'''Get default GMT configuration dict for given version.''' 

 

xversion = appropriate_defaults_version(version) 

 

# if not version in _gmt_defaults_by_version: 

# raise GMTError('No GMT defaults for version %s found' % version) 

 

gmt_defaults = _gmt_defaults_by_version[xversion] 

 

d = {} 

for line in gmt_defaults.splitlines(): 

sline = line.strip() 

if not sline or sline.startswith('#'): 

continue 

 

k, v = sline.split('=', 1) 

d[k.strip()] = v.strip() 

 

return d 

 

 

def diff_defaults(v1, v2): 

d1 = gmt_default_config(v1) 

d2 = gmt_default_config(v2) 

for k in d1: 

if k not in d2: 

print('%s not in %s' % (k, v2)) 

else: 

if d1[k] != d2[k]: 

print('%s %s = %s' % (v1, k, d1[k])) 

print('%s %s = %s' % (v2, k, d2[k])) 

 

for k in d2: 

if k not in d1: 

print('%s not in %s' % (k, v1)) 

 

# diff_defaults('4.5.2', '4.5.3') 

 

 

def check_gmt_installation(installation): 

 

home_dir = installation.get('home', None) 

bin_dir = installation['bin'] 

version = installation['version'] 

 

for d in home_dir, bin_dir: 

if d is not None: 

if not os.path.exists(d): 

logging.error(('Directory does not exist: %s\n' 

'Check your GMT installation.') % d) 

 

if version[0] != '5': 

gmtdefaults = pjoin(bin_dir, 'gmtdefaults') 

 

versionfound = get_gmt_version(gmtdefaults, home_dir) 

 

if versionfound != version: 

raise GMTInstallationProblem(( 

'Expected GMT version %s but found version %s.\n' 

'(Looking at output of %s)') % ( 

version, versionfound, gmtdefaults)) 

 

 

def get_gmt_installation(version): 

setup_gmt_installations() 

if version != 'newest' and version not in _gmt_installations: 

logging.warn('GMT version %s not installed, taking version %s instead' 

% (version, newest_installed_gmt_version())) 

 

version = 'newest' 

 

if version == 'newest': 

version = newest_installed_gmt_version() 

 

installation = dict(_gmt_installations[version]) 

 

return installation 

 

 

def setup_gmt_installations(): 

if not setup_gmt_installations.have_done: 

if not _gmt_installations: 

 

_gmt_installations.update(detect_gmt_installations()) 

 

# store defaults as dicts into the gmt installations dicts 

for version, installation in _gmt_installations.items(): 

installation['defaults'] = gmt_default_config(version) 

installation['version'] = version 

 

for installation in _gmt_installations.values(): 

check_gmt_installation(installation) 

 

setup_gmt_installations.have_done = True 

 

 

setup_gmt_installations.have_done = False 

 

_paper_sizes_a = '''A0 2380 3368 

A1 1684 2380 

A2 1190 1684 

A3 842 1190 

A4 595 842 

A5 421 595 

A6 297 421 

A7 210 297 

A8 148 210 

A9 105 148 

A10 74 105 

B0 2836 4008 

B1 2004 2836 

B2 1418 2004 

B3 1002 1418 

B4 709 1002 

B5 501 709 

archA 648 864 

archB 864 1296 

archC 1296 1728 

archD 1728 2592 

archE 2592 3456 

flsa 612 936 

halfletter 396 612 

note 540 720 

letter 612 792 

legal 612 1008 

11x17 792 1224 

ledger 1224 792''' 

 

 

_paper_sizes = {} 

 

 

def setup_paper_sizes(): 

if not _paper_sizes: 

for line in _paper_sizes_a.splitlines(): 

k, w, h = line.split() 

_paper_sizes[k.lower()] = float(w), float(h) 

 

 

def get_paper_size(k): 

setup_paper_sizes() 

return _paper_sizes[k.lower().rstrip('+')] 

 

 

def all_paper_sizes(): 

setup_paper_sizes() 

return _paper_sizes 

 

 

def measure_unit(gmt_config): 

for k in ['MEASURE_UNIT', 'PROJ_LENGTH_UNIT']: 

if k in gmt_config: 

return gmt_config[k] 

 

raise GmtPyError('cannot get measure unit / proj length unit from config') 

 

 

def paper_media(gmt_config): 

for k in ['PAPER_MEDIA', 'PS_MEDIA']: 

if k in gmt_config: 

return gmt_config[k] 

 

raise GmtPyError('cannot get paper media from config') 

 

 

def page_orientation(gmt_config): 

for k in ['PAGE_ORIENTATION', 'PS_PAGE_ORIENTATION']: 

if k in gmt_config: 

return gmt_config[k] 

 

raise GmtPyError('cannot get paper orientation from config') 

 

 

def make_bbox(width, height, gmt_config, margins=(0.8, 0.8, 0.8, 0.8)): 

 

leftmargin, topmargin, rightmargin, bottommargin = margins 

portrait = page_orientation(gmt_config).lower() == 'portrait' 

 

paper_size = get_paper_size(paper_media(gmt_config)) 

if not portrait: 

paper_size = paper_size[1], paper_size[0] 

 

xoffset = (paper_size[0] - (width + leftmargin + rightmargin)) / \ 

2.0 + leftmargin 

yoffset = (paper_size[1] - (height + topmargin + bottommargin)) / \ 

2.0 + bottommargin 

 

if portrait: 

bb1 = int((xoffset - leftmargin)) 

bb2 = int((yoffset - bottommargin)) 

bb3 = bb1 + int((width+leftmargin+rightmargin)) 

bb4 = bb2 + int((height+topmargin+bottommargin)) 

else: 

bb1 = int((yoffset - topmargin)) 

bb2 = int((xoffset - leftmargin)) 

bb3 = bb1 + int((height+topmargin+bottommargin)) 

bb4 = bb2 + int((width+leftmargin+rightmargin)) 

 

return xoffset, yoffset, (bb1, bb2, bb3, bb4) 

 

 

def gmtdefaults_as_text(version='newest'): 

 

'''Get the built-in gmtdefaults.''' 

 

if version not in _gmt_installations: 

logging.warn('GMT version %s not installed, taking version %s instead' 

% (version, newest_installed_gmt_version())) 

version = 'newest' 

 

if version == 'newest': 

version = newest_installed_gmt_version() 

 

return _gmt_defaults_by_version[version] 

 

 

def savegrd(x, y, z, filename, title=None, naming='xy'): 

'''Write COARDS compliant netcdf (grd) file.''' 

 

assert y.size, x.size == z.shape 

ny, nx = z.shape 

nc = netcdf.netcdf_file(filename, 'w') 

assert naming in ('xy', 'lonlat') 

 

if naming == 'xy': 

kx, ky = 'x', 'y' 

else: 

kx, ky = 'lon', 'lat' 

 

nc.node_offset = 0 

if title is not None: 

nc.title = title 

 

nc.Conventions = 'COARDS/CF-1.0' 

nc.createDimension(kx, nx) 

nc.createDimension(ky, ny) 

 

xvar = nc.createVariable(kx, 'd', (kx,)) 

yvar = nc.createVariable(ky, 'd', (ky,)) 

if naming == 'xy': 

xvar.long_name = kx 

yvar.long_name = ky 

else: 

xvar.long_name = 'longitude' 

xvar.units = 'degrees_east' 

yvar.long_name = 'latitude' 

yvar.units = 'degrees_north' 

 

zvar = nc.createVariable('z', 'd', (ky, kx)) 

 

xvar[:] = x.astype(num.float64) 

yvar[:] = y.astype(num.float64) 

zvar[:] = z.astype(num.float64) 

 

nc.close() 

 

 

def to_array(var): 

arr = var[:].copy() 

if hasattr(var, 'scale_factor'): 

arr *= var.scale_factor 

 

if hasattr(var, 'add_offset'): 

arr += var.add_offset 

 

return arr 

 

 

def loadgrd(filename): 

'''Read COARDS compliant netcdf (grd) file.''' 

 

nc = netcdf.netcdf_file(filename, 'r') 

vkeys = list(nc.variables.keys()) 

kx = 'x' 

ky = 'y' 

if 'lon' in vkeys: 

kx = 'lon' 

if 'lat' in vkeys: 

ky = 'lat' 

 

x = to_array(nc.variables[kx]) 

y = to_array(nc.variables[ky]) 

z = to_array(nc.variables['z']) 

 

nc.close() 

return x, y, z 

 

 

def centers_to_edges(asorted): 

return (asorted[1:] + asorted[:-1])/2. 

 

 

def nvals(asorted): 

eps = (asorted[-1]-asorted[0])/asorted.size 

return num.sum(asorted[1:] - asorted[:-1] >= eps) + 1 

 

 

def guess_vals(asorted): 

eps = (asorted[-1]-asorted[0])/asorted.size 

indis = num.nonzero(asorted[1:] - asorted[:-1] >= eps)[0] 

indis = num.concatenate((num.array([0]), indis+1, 

num.array([asorted.size]))) 

asum = num.zeros(asorted.size+1) 

asum[1:] = num.cumsum(asorted) 

return (asum[indis[1:]] - asum[indis[:-1]]) / (indis[1:]-indis[:-1]) 

 

 

def blockmean(asorted, b): 

indis = num.nonzero(asorted[1:] - asorted[:-1])[0] 

indis = num.concatenate((num.array([0]), indis+1, 

num.array([asorted.size]))) 

bsum = num.zeros(b.size+1) 

bsum[1:] = num.cumsum(b) 

return ( 

asorted[indis[:-1]], 

(bsum[indis[1:]] - bsum[indis[:-1]]) / (indis[1:]-indis[:-1])) 

 

 

def griddata_regular(x, y, z, xvals, yvals): 

nx, ny = xvals.size, yvals.size 

xindi = num.digitize(x, centers_to_edges(xvals)) 

yindi = num.digitize(y, centers_to_edges(yvals)) 

 

zindi = yindi*nx+xindi 

order = num.argsort(zindi) 

z = z[order] 

zindi = zindi[order] 

 

zindi, z = blockmean(zindi, z) 

znew = num.empty(nx*ny, dtype=num.float) 

znew[:] = num.nan 

znew[zindi] = z 

return znew.reshape(ny, nx) 

 

 

def guess_field_size(x_sorted, y_sorted, z=None, mode=None): 

critical_fraction = 1./num.e - 0.014*3 

xs = x_sorted 

ys = y_sorted 

nxs, nys = nvals(xs), nvals(ys) 

if mode == 'nonrandom': 

return nxs, nys, 0 

elif xs.size == nxs*nys: 

# exact match 

return nxs, nys, 0 

elif nxs >= xs.size*critical_fraction and nys >= xs.size*critical_fraction: 

# possibly randomly sampled 

nxs = int(math.sqrt(xs.size)) 

nys = nxs 

return nxs, nys, 2 

else: 

return nxs, nys, 1 

 

 

def griddata_auto(x, y, z, mode=None): 

'''Grid tabular XYZ data by binning. 

 

This function does some extra work to guess the size of the grid. This 

should work fine if the input values are already defined on an rectilinear 

grid, even if data points are missing or duplicated. This routine also 

tries to detect a random distribution of input data and in that case 

creates a grid of size sqrt(N) x sqrt(N). 

 

The points do not have to be given in any particular order. Grid nodes 

without data are assigned the NaN value. If multiple data points map to the 

same grid node, their average is assigned to the grid node. ''' 

 

x, y, z = [num.asarray(X) for X in (x, y, z)] 

assert x.size == y.size == z.size 

xs, ys = num.sort(x), num.sort(y) 

nx, ny, badness = guess_field_size(xs, ys, z, mode=mode) 

if badness <= 1: 

xf = guess_vals(xs) 

yf = guess_vals(ys) 

zf = griddata_regular(x, y, z, xf, yf) 

else: 

xf = num.linspace(xs[0], xs[-1], nx) 

yf = num.linspace(ys[0], ys[-1], ny) 

zf = griddata_regular(x, y, z, xf, yf) 

 

return xf, yf, zf 

 

 

def tabledata(xf, yf, zf): 

assert yf.size, xf.size == zf.shape 

x = num.tile(xf, yf.size) 

y = num.repeat(yf, xf.size) 

z = zf.flatten() 

return x, y, z 

 

 

def double1d(a): 

a2 = num.empty(a.size*2-1) 

a2[::2] = a 

a2[1::2] = (a[:-1] + a[1:])/2. 

return a2 

 

 

def double2d(f): 

f2 = num.empty((f.shape[0]*2-1, f.shape[1]*2-1)) 

f2[:, :] = num.nan 

f2[::2, ::2] = f 

f2[1::2, ::2] = (f[:-1, :] + f[1:, :])/2. 

f2[::2, 1::2] = (f[:, :-1] + f[:, 1:])/2. 

f2[1::2, 1::2] = (f[:-1, :-1] + f[1:, :-1] + f[:-1, 1:] + f[1:, 1:])/4. 

diag = f2[1::2, 1::2] 

diagA = (f[:-1, :-1] + f[1:, 1:]) / 2. 

diagB = (f[1:, :-1] + f[:-1, 1:]) / 2. 

f2[1::2, 1::2] = num.where(num.isnan(diag), diagA, diag) 

f2[1::2, 1::2] = num.where(num.isnan(diag), diagB, diag) 

return f2 

 

 

def doublegrid(x, y, z): 

x2 = double1d(x) 

y2 = double1d(y) 

z2 = double2d(z) 

return x2, y2, z2 

 

 

class Guru(object): 

'''Abstract base class providing template interpolation, accessible as 

attributes. 

 

Classes deriving from this one, have to implement a :py:meth:`get_params` 

method, which is called to get a dict to do ordinary 

``"%(key)x"``-substitutions. The deriving class must also provide a dict 

with the templates.''' 

 

def __init__(self): 

self.templates = {} 

 

def fill(self, templates, **kwargs): 

params = self.get_params(**kwargs) 

strings = [t % params for t in templates] 

return strings 

 

# hand through templates dict 

def __getitem__(self, template_name): 

return self.templates[template_name] 

 

def __setitem__(self, template_name, template): 

self.templates[template_name] = template 

 

def __contains__(self, template_name): 

return template_name in self.templates 

 

def __iter__(self): 

return iter(self.templates) 

 

def __len__(self): 

return len(self.templates) 

 

def __delitem__(self, template_name): 

del(self.templates[template_name]) 

 

def _simple_fill(self, template_names, **kwargs): 

templates = [self.templates[n] for n in template_names] 

return self.fill(templates, **kwargs) 

 

def __getattr__(self, template_names): 

if [n for n in template_names if n not in self.templates]: 

raise AttributeError(template_names) 

 

def f(**kwargs): 

return self._simple_fill(template_names, **kwargs) 

 

return f 

 

 

def nice_value(x): 

'''Round ``x`` to nice value.''' 

 

exp = 1.0 

sign = 1 

if x < 0.0: 

x = -x 

sign = -1 

while x >= 1.0: 

x /= 10.0 

exp *= 10.0 

while x < 0.1: 

x *= 10.0 

exp /= 10.0 

 

if x >= 0.75: 

return sign * 1.0 * exp 

if x >= 0.375: 

return sign * 0.5 * exp 

if x >= 0.225: 

return sign * 0.25 * exp 

if x >= 0.15: 

return sign * 0.2 * exp 

 

return sign * 0.1 * exp 

 

 

class AutoScaler(object): 

'''Tunable 1D autoscaling based on data range. 

 

Instances of this class may be used to determine nice minima, maxima and 

increments for ax annotations, as well as suitable common exponents for 

notation. 

 

The autoscaling process is guided by the following public attributes: 

 

.. py:attribute:: approx_ticks 

 

Approximate number of increment steps (tickmarks) to generate. 

 

.. py:attribute:: mode 

 

Mode of operation: one of ``'auto'``, ``'min-max'``, ``'0-max'``, 

``'min-0'``, ``'symmetric'`` or ``'off'``. 

 

================ ================================================== 

mode description 

================ ================================================== 

``'auto'``: Look at data range and choose one of the choices 

below. 

``'min-max'``: Output range is selected to include data range. 

``'0-max'``: Output range shall start at zero and end at data 

max. 

``'min-0'``: Output range shall start at data min and end at 

zero. 

``'symmetric'``: Output range shall by symmetric by zero. 

``'off'``: Similar to ``'min-max'``, but snap and space are 

disabled, such that the output range always 

exactly matches the data range. 

================ ================================================== 

 

.. py:attribute:: exp 

 

If defined, override automatically determined exponent for notation 

by the given value. 

 

.. py:attribute:: snap 

 

If set to True, snap output range to multiples of increment. This 

parameter has no effect, if mode is set to ``'off'``. 

 

.. py:attribute:: inc 

 

If defined, override automatically determined tick increment by the 

given value. 

 

.. py:attribute:: space 

 

Add some padding to the range. The value given, is the fraction by 

which the output range is increased on each side. If mode is 

``'0-max'`` or ``'min-0'``, the end at zero is kept fixed at zero. 

This parameter has no effect if mode is set to ``'off'``. 

 

.. py:attribute:: exp_factor 

 

Exponent of notation is chosen to be a multiple of this value. 

 

.. py:attribute:: no_exp_interval: 

 

Range of exponent, for which no exponential notation is allowed. 

 

''' 

 

def __init__( 

self, 

approx_ticks=7.0, 

mode='auto', 

exp=None, 

snap=False, 

inc=None, 

space=0.0, 

exp_factor=3, 

no_exp_interval=(-3, 5)): 

 

'''Create new AutoScaler instance. 

 

The parameters are described in the AutoScaler documentation. 

''' 

 

self.approx_ticks = approx_ticks 

self.mode = mode 

self.exp = exp 

self.snap = snap 

self.inc = inc 

self.space = space 

self.exp_factor = exp_factor 

self.no_exp_interval = no_exp_interval 

 

def make_scale(self, data_range, override_mode=None): 

 

'''Get nice minimum, maximum and increment for given data range. 

 

Returns ``(minimum, maximum, increment)`` or ``(maximum, minimum, 

-increment)``, depending on whether data_range is ``(data_min, 

data_max)`` or ``(data_max, data_min)``. If ``override_mode`` is 

defined, the mode attribute is temporarily overridden by the given 

value. ''' 

 

data_min = min(data_range) 

data_max = max(data_range) 

 

is_reverse = (data_range[0] > data_range[1]) 

 

a = self.mode 

if self.mode == 'auto': 

a = self.guess_autoscale_mode(data_min, data_max) 

 

if override_mode is not None: 

a = override_mode 

 

mi, ma = 0, 0 

if a == 'off': 

mi, ma = data_min, data_max 

elif a == '0-max': 

mi = 0.0 

if data_max > 0.0: 

ma = data_max 

else: 

ma = 1.0 

elif a == 'min-0': 

ma = 0.0 

if data_min < 0.0: 

mi = data_min 

else: 

mi = -1.0 

elif a == 'min-max': 

mi, ma = data_min, data_max 

elif a == 'symmetric': 

m = max(abs(data_min), abs(data_max)) 

mi = -m 

ma = m 

 

nmi = mi 

if (mi != 0. or a == 'min-max') and a != 'off': 

nmi = mi - self.space*(ma-mi) 

 

nma = ma 

if (ma != 0. or a == 'min-max') and a != 'off': 

nma = ma + self.space*(ma-mi) 

 

mi, ma = nmi, nma 

 

if mi == ma and a != 'off': 

mi -= 1.0 

ma += 1.0 

 

# make nice tick increment 

if self.inc is not None: 

inc = self.inc 

else: 

if self.approx_ticks > 0.: 

inc = nice_value((ma-mi) / self.approx_ticks) 

else: 

inc = nice_value((ma-mi)*10.) 

 

if inc == 0.0: 

inc = 1.0 

 

# snap min and max to ticks if this is wanted 

if self.snap and a != 'off': 

ma = inc * math.ceil(ma/inc) 

mi = inc * math.floor(mi/inc) 

 

if is_reverse: 

return ma, mi, -inc 

else: 

return mi, ma, inc 

 

def make_exp(self, x): 

'''Get nice exponent for notation of ``x``. 

 

For ax annotations, give tick increment as ``x``.''' 

 

if self.exp is not None: 

return self.exp 

 

x = abs(x) 

if x == 0.0: 

return 0 

 

if 10**self.no_exp_interval[0] <= x <= 10**self.no_exp_interval[1]: 

return 0 

 

return math.floor(math.log10(x)/self.exp_factor)*self.exp_factor 

 

def guess_autoscale_mode(self, data_min, data_max): 

'''Guess mode of operation, based on data range. 

 

Used to map ``'auto'`` mode to ``'0-max'``, ``'min-0'``, ``'min-max'`` 

or ``'symmetric'``.''' 

 

a = 'min-max' 

if data_min >= 0.0: 

if data_min < data_max/2.: 

a = '0-max' 

else: 

a = 'min-max' 

if data_max <= 0.0: 

if data_max > data_min/2.: 

a = 'min-0' 

else: 

a = 'min-max' 

if data_min < 0.0 and data_max > 0.0: 

if abs((abs(data_max)-abs(data_min)) / 

(abs(data_max)+abs(data_min))) < 0.5: 

a = 'symmetric' 

else: 

a = 'min-max' 

return a 

 

 

class Ax(AutoScaler): 

'''Ax description with autoscaling capabilities. 

 

The ax is described by the :py:class:`AutoScaler` public attributes, plus 

the following additional attributes (with default values given in 

paranthesis): 

 

.. py:attribute:: label 

 

Ax label (without unit). 

 

.. py:attribute:: unit 

 

Physical unit of the data attached to this ax. 

 

.. py:attribute:: scaled_unit 

 

(see below) 

 

.. py:attribute:: scaled_unit_factor 

 

Scaled physical unit and factor between unit and scaled_unit so that 

 

unit = scaled_unit_factor x scaled_unit. 

 

(E.g. if unit is 'm' and data is in the range of nanometers, you may 

want to set the scaled_unit to 'nm' and the scaled_unit_factor to 

1e9.) 

 

.. py:attribute:: limits 

 

If defined, fix range of ax to limits=(min,max). 

 

.. py:attribute:: masking 

 

If true and if there is a limit on the ax, while calculating ranges, 

the data points are masked such that data points outside of this axes 

limits are not used to determine the range of another dependant ax. 

 

''' 

 

def __init__(self, label='', unit='', scaled_unit_factor=1., 

scaled_unit='', limits=None, masking=True, **kwargs): 

 

AutoScaler.__init__(self, **kwargs) 

self.label = label 

self.unit = unit 

self.scaled_unit_factor = scaled_unit_factor 

self.scaled_unit = scaled_unit 

self.limits = limits 

self.masking = masking 

 

def label_str(self, exp, unit): 

'''Get label string including the unit and multiplier.''' 

 

slabel, sunit, sexp = '', '', '' 

if self.label: 

slabel = self.label 

 

if unit or exp != 0: 

if exp != 0: 

sexp = '\\327 10@+%i@+' % exp 

sunit = '[ %s %s ]' % (sexp, unit) 

else: 

sunit = '[ %s ]' % unit 

 

p = [] 

if slabel: 

p.append(slabel) 

 

if sunit: 

p.append(sunit) 

 

return ' '.join(p) 

 

def make_params(self, data_range, ax_projection=False, override_mode=None, 

override_scaled_unit_factor=None): 

 

'''Get minimum, maximum, increment and label string for ax display.' 

 

Returns minimum, maximum, increment and label string including unit and 

multiplier for given data range. 

 

If ``ax_projection`` is True, values suitable to be displayed on the ax 

are returned, e.g. min, max and inc are returned in scaled units. 

Otherwise the values are returned in the original units, without any 

scaling applied. ''' 

 

sf = self.scaled_unit_factor 

 

if override_scaled_unit_factor is not None: 

sf = override_scaled_unit_factor 

 

dr_scaled = [sf*x for x in data_range] 

 

mi, ma, inc = self.make_scale(dr_scaled, override_mode=override_mode) 

if self.inc is not None: 

inc = self.inc*sf 

 

if ax_projection: 

exp = self.make_exp(inc) 

if sf == 1. and override_scaled_unit_factor is None: 

unit = self.unit 

else: 

unit = self.scaled_unit 

label = self.label_str(exp, unit) 

return mi/10**exp, ma/10**exp, inc/10**exp, label 

else: 

label = self.label_str(0, self.unit) 

return mi/sf, ma/sf, inc/sf, label 

 

 

class ScaleGuru(Guru): 

 

'''2D/3D autoscaling and ax annotation facility. 

 

Instances of this class provide automatic determination of plot ranges, 

tick increments and scaled annotations, as well as label/unit handling. It 

can in particular be used to automatically generate the -R and -B option 

arguments, which are required for most GMT commands. 

 

It extends the functionality of the :py:class:`Ax` and 

:py:class:`AutoScaler` classes at the level, where it can not be handled 

anymore by looking at a single dimension of the dataset's data, e.g.: 

 

* The ability to impose a fixed aspect ratio between two axes. 

 

* Recalculation of data range on non-limited axes, when there are 

limits imposed on other axes. 

 

''' 

 

def __init__(self, data_tuples=None, axes=None, aspect=None, 

percent_interval=None, copy_from=None): 

 

Guru.__init__(self) 

 

if copy_from: 

self.templates = copy.deepcopy(copy_from.templates) 

self.axes = copy.deepcopy(copy_from.axes) 

self.data_ranges = copy.deepcopy(copy_from.data_ranges) 

self.aspect = copy_from.aspect 

 

if percent_interval is not None: 

from scipy.stats import scoreatpercentile as scap 

 

self.templates = dict( 

R='-R%(xmin)g/%(xmax)g/%(ymin)g/%(ymax)g', 

B='-B%(xinc)g:%(xlabel)s:/%(yinc)g:%(ylabel)s:WSen', 

T='-T%(zmin)g/%(zmax)g/%(zinc)g') 

 

maxdim = 2 

if data_tuples: 

maxdim = max(maxdim, max([len(dt) for dt in data_tuples])) 

else: 

if axes: 

maxdim = len(axes) 

data_tuples = [([],) * maxdim] 

if axes is not None: 

self.axes = axes 

else: 

self.axes = [Ax() for i in range(maxdim)] 

 

# sophisticated data-range calculation 

data_ranges = [None] * maxdim 

for dt_ in data_tuples: 

dt = num.asarray(dt_) 

in_range = True 

for ax, x in zip(self.axes, dt): 

if ax.limits and ax.masking: 

ax_limits = list(ax.limits) 

if ax_limits[0] is None: 

ax_limits[0] = -num.inf 

if ax_limits[1] is None: 

ax_limits[1] = num.inf 

in_range = num.logical_and( 

in_range, 

num.logical_and(ax_limits[0] <= x, x <= ax_limits[1])) 

 

for i, ax, x in zip(range(maxdim), self.axes, dt): 

 

if not ax.limits or None in ax.limits: 

if len(x) >= 1: 

if in_range is not True: 

xmasked = num.where(in_range, x, num.NaN) 

if percent_interval is None: 

range_this = ( 

num.nanmin(xmasked), 

num.nanmax(xmasked)) 

else: 

xmasked_finite = num.compress( 

num.isfinite(xmasked), xmasked) 

range_this = ( 

scap(xmasked_finite, 

(100.-percent_interval)/2.), 

scap(xmasked_finite, 

100.-(100.-percent_interval)/2.)) 

else: 

if percent_interval is None: 

range_this = num.nanmin(x), num.nanmax(x) 

else: 

xmasked_finite = num.compress( 

num.isfinite(xmasked), xmasked) 

range_this = ( 

scap(xmasked_finite, 

(100.-percent_interval)/2.), 

scap(xmasked_finite, 

100.-(100.-percent_interval)/2.)) 

else: 

range_this = (0., 1.) 

 

if ax.limits: 

if ax.limits[0] is not None: 

range_this = ax.limits[0], max(ax.limits[0], 

range_this[1]) 

 

if ax.limits[1] is not None: 

range_this = min(ax.limits[1], 

range_this[0]), ax.limits[1] 

 

else: 

range_this = ax.limits 

 

if data_ranges[i] is None and range_this[0] <= range_this[1]: 

data_ranges[i] = range_this 

else: 

mi, ma = range_this 

if data_ranges[i] is not None: 

mi = min(data_ranges[i][0], mi) 

ma = max(data_ranges[i][1], ma) 

 

data_ranges[i] = (mi, ma) 

 

for i in range(len(data_ranges)): 

if data_ranges[i] is None or not ( 

num.isfinite(data_ranges[i][0]) 

and num.isfinite(data_ranges[i][1])): 

 

data_ranges[i] = (0., 1.) 

 

self.data_ranges = data_ranges 

self.aspect = aspect 

 

def copy(self): 

return ScaleGuru(copy_from=self) 

 

def get_params(self, ax_projection=False): 

 

'''Get dict with output parameters. 

 

For each data dimension, ax minimum, maximum, increment and a label 

string (including unit and exponential factor) are determined. E.g. in 

for the first dimension the output dict will contain the keys 

``'xmin'``, ``'xmax'``, ``'xinc'``, and ``'xlabel'``. 

 

Normally, values corresponding to the scaling of the raw data are 

produced, but if ``ax_projection`` is ``True``, values which are 

suitable to be printed on the axes are returned. This means that in the 

latter case, the :py:attr:`Ax.scaled_unit` and 

:py:attr:`Ax.scaled_unit_factor` attributes as set on the axes are 

respected and that a common 10^x factor is factored out and put to the 

label string. ''' 

 

xmi, xma, xinc, xlabel = self.axes[0].make_params( 

self.data_ranges[0], ax_projection) 

ymi, yma, yinc, ylabel = self.axes[1].make_params( 

self.data_ranges[1], ax_projection) 

if len(self.axes) > 2: 

zmi, zma, zinc, zlabel = self.axes[2].make_params( 

self.data_ranges[2], ax_projection) 

 

# enforce certain aspect, if needed 

if self.aspect is not None: 

xwid = xma-xmi 

ywid = yma-ymi 

if ywid < xwid*self.aspect: 

ymi -= (xwid*self.aspect - ywid)*0.5 

yma += (xwid*self.aspect - ywid)*0.5 

ymi, yma, yinc, ylabel = self.axes[1].make_params( 

(ymi, yma), ax_projection, override_mode='off', 

override_scaled_unit_factor=1.) 

 

elif xwid < ywid/self.aspect: 

xmi -= (ywid/self.aspect - xwid)*0.5 

xma += (ywid/self.aspect - xwid)*0.5 

xmi, xma, xinc, xlabel = self.axes[0].make_params( 

(xmi, xma), ax_projection, override_mode='off', 

override_scaled_unit_factor=1.) 

 

params = dict(xmin=xmi, xmax=xma, xinc=xinc, xlabel=xlabel, 

ymin=ymi, ymax=yma, yinc=yinc, ylabel=ylabel) 

if len(self.axes) > 2: 

params.update(dict(zmin=zmi, zmax=zma, zinc=zinc, zlabel=zlabel)) 

 

return params 

 

 

class GumSpring(object): 

 

'''Sizing policy implementing a minimal size, plus a desire to grow.''' 

 

def __init__(self, minimal=None, grow=None): 

self.minimal = minimal 

if grow is None: 

if minimal is None: 

self.grow = 1.0 

else: 

self.grow = 0.0 

else: 

self.grow = grow 

self.value = 1.0 

 

def get_minimal(self): 

if self.minimal is not None: 

return self.minimal 

else: 

return 0.0 

 

def get_grow(self): 

return self.grow 

 

def set_value(self, value): 

self.value = value 

 

def get_value(self): 

return self.value 

 

 

def distribute(sizes, grows, space): 

sizes = list(sizes) 

gsum = sum(grows) 

if gsum > 0.0: 

for i in range(len(sizes)): 

sizes[i] += space*grows[i]/gsum 

return sizes 

 

 

class Widget(Guru): 

 

'''Base class of the gmtpy layout system. 

 

The Widget class provides the basic functionality for the nesting and 

placing of elements on the output page, and maintains the sizing policies 

of each element. Each of the layouts defined in gmtpy is itself a Widget. 

 

Sizing of the widget is controlled by :py:meth:`get_min_size` and 

:py:meth:`get_grow` which should be overloaded in derived classes. The 

basic behaviour of a Widget instance is to have a vertical and a horizontal 

minimum size which default to zero, as well as a vertical and a horizontal 

desire to grow, represented by floats, which default to 1.0. Additionally 

an aspect ratio constraint may be imposed on the Widget. 

 

After layouting, the widget provides its width, height, x-offset and 

y-offset in various ways. Via the Guru interface (see :py:class:`Guru` 

class), templates for the -X, -Y and -J option arguments used by GMT 

arguments are provided. The defaults are suitable for plotting of linear 

(-JX) plots. Other projections can be selected by giving an appropriate 'J' 

template, or by manual construction of the -J option, e.g. by utilizing the 

:py:meth:`width` and :py:meth:`height` methods. The :py:meth:`bbox` method 

can be used to create a PostScript bounding box from the widgets border, 

e.g. for use in the :py:meth:`save` method of :py:class:`GMT` instances. 

 

The convention is, that all sizes are given in PostScript points. 

Conversion factors are provided as constants :py:const:`inch` and 

:py:const:`cm` in the gmtpy module. ''' 

 

def __init__(self, horizontal=None, vertical=None, parent=None): 

 

'''Create new widget.''' 

 

Guru.__init__(self) 

 

self.templates = dict( 

X='-Xa%(xoffset)gp', 

Y='-Ya%(yoffset)gp', 

J='-JX%(width)gp/%(height)gp') 

 

if horizontal is None: 

self.horizontal = GumSpring() 

else: 

self.horizontal = horizontal 

 

if vertical is None: 

self.vertical = GumSpring() 

else: 

self.vertical = vertical 

 

self.aspect = None 

self.parent = parent 

self.dirty = True 

 

def set_parent(self, parent): 

 

'''Set the parent widget. 

 

This method should not be called directly. The :py:meth:`set_widget` 

methods are responsible for calling this. ''' 

 

self.parent = parent 

self.dirtyfy() 

 

def get_parent(self): 

 

'''Get the widgets parent widget.''' 

 

return self.parent 

 

def get_root(self): 

 

'''Get the root widget in the layout hierarchy.''' 

 

if self.parent is not None: 

return self.get_parent() 

else: 

return self 

 

def set_horizontal(self, minimal=None, grow=None): 

 

'''Set the horizontal sizing policy of the Widget. 

 

 

:param minimal: new minimal width of the widget 

:param grow: new horizontal grow disire of the widget 

''' 

 

self.horizontal = GumSpring(minimal, grow) 

self.dirtyfy() 

 

def get_horizontal(self): 

return self.horizontal.get_minimal(), self.horizontal.get_grow() 

 

def set_vertical(self, minimal=None, grow=None): 

 

'''Set the horizontal sizing policy of the Widget. 

 

:param minimal: new minimal height of the widget 

:param grow: new vertical grow disire of the widget 

''' 

 

self.vertical = GumSpring(minimal, grow) 

self.dirtyfy() 

 

def get_vertical(self): 

return self.vertical.get_minimal(), self.vertical.get_grow() 

 

def set_aspect(self, aspect=None): 

 

'''Set aspect constraint on the widget. 

 

The aspect is given as height divided by width. 

''' 

 

self.aspect = aspect 

self.dirtyfy() 

 

def set_policy(self, minimal=(None, None), grow=(None, None), aspect=None): 

 

'''Shortcut to set sizing and aspect constraints in a single method 

call.''' 

 

self.set_horizontal(minimal[0], grow[0]) 

self.set_vertical(minimal[1], grow[1]) 

self.set_aspect(aspect) 

 

def get_policy(self): 

mh, gh = self.get_horizontal() 

mv, gv = self.get_vertical() 

return (mh, mv), (gh, gv), self.aspect 

 

def legalize(self, size, offset): 

 

'''Get legal size for widget. 

 

Returns: (new_size, new_offset) 

 

Given a box as ``size`` and ``offset``, return ``new_size`` and 

``new_offset``, such that the widget's sizing and aspect constraints 

are fullfilled. The returned box is centered on the given input box. 

''' 

 

sh, sv = size 

oh, ov = offset 

shs, svs = Widget.get_min_size(self) 

ghs, gvs = Widget.get_grow(self) 

 

if ghs == 0.0: 

oh += (sh-shs)/2. 

sh = shs 

 

if gvs == 0.0: 

ov += (sv-svs)/2. 

sv = svs 

 

if self.aspect is not None: 

if sh > sv/self.aspect: 

oh += (sh-sv/self.aspect)/2. 

sh = sv/self.aspect 

if sv > sh*self.aspect: 

ov += (sv-sh*self.aspect)/2. 

sv = sh*self.aspect 

 

return (sh, sv), (oh, ov) 

 

def get_min_size(self): 

 

'''Get minimum size of widget. 

 

Used by the layout managers. Should be overloaded in derived classes. 

''' 

 

mh, mv = self.horizontal.get_minimal(), self.vertical.get_minimal() 

if self.aspect is not None: 

if mv == 0.0: 

return mh, mh*self.aspect 

elif mh == 0.0: 

return mv/self.aspect, mv 

return mh, mv 

 

def get_grow(self): 

 

'''Get widget's desire to grow. 

 

Used by the layout managers. Should be overloaded in derived classes. 

''' 

 

return self.horizontal.get_grow(), self.vertical.get_grow() 

 

def set_size(self, size, offset): 

 

'''Set the widget's current size. 

 

Should not be called directly. It is the layout manager's 

responsibility to call this. ''' 

 

(sh, sv), inner_offset = self.legalize(size, offset) 

self.offset = inner_offset 

self.horizontal.set_value(sh) 

self.vertical.set_value(sv) 

self.dirty = False 

 

def __str__(self): 

 

def indent(ind, str): 

return ('\n'+ind).join(str.splitlines()) 

size, offset = self.get_size() 

s = "%s (%g x %g) (%g, %g)\n" % ((self.__class__,) + size + offset) 

children = self.get_children() 

if children: 

s += '\n'.join([' ' + indent(' ', str(c)) for c in children]) 

return s 

 

def policies_debug_str(self): 

 

def indent(ind, str): 

return ('\n'+ind).join(str.splitlines()) 

mins, grows, aspect = self.get_policy() 

s = "%s: minimum=(%s, %s), grow=(%s, %s), aspect=%s\n" % ( 

(self.__class__,) + mins+grows+(aspect,)) 

 

children = self.get_children() 

if children: 

s += '\n'.join([' ' + indent( 

' ', c.policies_debug_str()) for c in children]) 

return s 

 

def get_corners(self, descend=False): 

 

'''Get coordinates of the corners of the widget. 

 

Returns list with coordinate tuples. 

 

If ``descend`` is True, the returned list will contain corner 

coordinates of all sub-widgets. 

''' 

 

self.do_layout() 

(sh, sv), (oh, ov) = self.get_size() 

corners = [(oh, ov), (oh+sh, ov), (oh+sh, ov+sv), (oh, ov+sv)] 

if descend: 

for child in self.get_children(): 

corners.extend(child.get_corners(descend=True)) 

return corners 

 

def get_sizes(self): 

 

'''Get sizes of this widget and all it's children. 

 

Returns a list with size tuples. 

''' 

self.do_layout() 

sizes = [self.get_size()] 

for child in self.get_children(): 

sizes.extend(child.get_sizes()) 

return sizes 

 

def do_layout(self): 

 

'''Triggers layouting of the widget hierarchy, if needed.''' 

 

if self.parent is not None: 

return self.parent.do_layout() 

 

if not self.dirty: 

return 

 

sh, sv = self.get_min_size() 

gh, gv = self.get_grow() 

if sh == 0.0 and gh != 0.0: 

sh = 15.*cm 

if sv == 0.0 and gv != 0.0: 

sv = 15.*cm*gv/gh * 1./golden_ratio 

self.set_size((sh, sv), (0., 0.)) 

 

def get_children(self): 

 

'''Get sub-widgets contained in this widget. 

 

Returns a list of widgets. 

''' 

 

return [] 

 

def get_size(self): 

 

'''Get current size and position of the widget. 

 

Triggers layouting and returns 

``((width, height), (xoffset, yoffset))`` 

''' 

 

self.do_layout() 

return (self.horizontal.get_value(), 

self.vertical.get_value()), self.offset 

 

def get_params(self): 

 

'''Get current size and position of the widget. 

 

Triggers layouting and returns dict with keys ``'xoffset'``, 

``'yoffset'``, ``'width'`` and ``'height'``. ''' 

 

self.do_layout() 

(w, h), (xo, yo) = self.get_size() 

return dict(xoffset=xo, yoffset=yo, width=w, height=h, 

width_m=w/_units['m']) 

 

def width(self): 

 

'''Get current width of the widget. 

 

Triggers layouting and returns width.''' 

 

self.do_layout() 

return self.horizontal.get_value() 

 

def height(self): 

 

'''Get current height of the widget. 

 

Triggers layouting and return height.''' 

 

self.do_layout() 

return self.vertical.get_value() 

 

def bbox(self): 

 

'''Get PostScript bounding box for this widget. 

 

Triggers layouting and returns values suitable to create PS bounding 

box, representing the widgets current size and position. 

''' 

 

self.do_layout() 

return (self.offset[0], self.offset[1], self.offset[0]+self.width(), 

self.offset[1]+self.height()) 

 

def dirtyfy(self): 

 

'''Set dirty flag on top level widget in the hierarchy. 

 

Called by various methods, to indicate, that the widget hierarchy needs 

new layouting. 

''' 

 

if self.parent is not None: 

self.parent.dirtyfy() 

 

self.dirty = True 

 

 

class CenterLayout(Widget): 

 

'''A layout manager which centers its single child widget. 

 

The child widget may be oversized. 

''' 

 

def __init__(self, horizontal=None, vertical=None): 

Widget.__init__(self, horizontal, vertical) 

self.content = Widget(horizontal=GumSpring(grow=1.), 

vertical=GumSpring(grow=1.), parent=self) 

 

def get_min_size(self): 

shs, svs = Widget.get_min_size(self) 

sh, sv = self.content.get_min_size() 

return max(shs, sh), max(svs, sv) 

 

def get_grow(self): 

ghs, gvs = Widget.get_grow(self) 

gh, gv = self.content.get_grow() 

return gh*ghs, gv*gvs 

 

def set_size(self, size, offset): 

(sh, sv), (oh, ov) = self.legalize(size, offset) 

 

shc, svc = self.content.get_min_size() 

ghc, gvc = self.content.get_grow() 

if ghc != 0.: 

shc = sh 

if gvc != 0.: 

svc = sv 

ohc = oh+(sh-shc)/2. 

ovc = ov+(sv-svc)/2. 

 

self.content.set_size((shc, svc), (ohc, ovc)) 

Widget.set_size(self, (sh, sv), (oh, ov)) 

 

def set_widget(self, widget=None): 

 

'''Set the child widget, which shall be centered.''' 

 

if widget is None: 

widget = Widget() 

 

self.content = widget 

 

widget.set_parent(self) 

 

def get_widget(self): 

return self.content 

 

def get_children(self): 

return [self.content] 

 

 

class FrameLayout(Widget): 

 

'''A layout manager containing a center widget sorrounded by four margin 

widgets. 

 

:: 

 

+---------------------------+ 

| top | 

+---------------------------+ 

| | | | 

| left | center | right | 

| | | | 

+---------------------------+ 

| bottom | 

+---------------------------+ 

 

This layout manager does a little bit of extra effort to maintain the 

aspect constraint of the center widget, if this is set. It does so, by 

allowing for a bit more flexibility in the sizing of the margins. Two 

shortcut methods are provided to set the margin sizes in one shot: 

:py:meth:`set_fixed_margins` and :py:meth:`set_min_margins`. The first sets 

the margins to fixed sizes, while the second gives them a minimal size and 

a (neglectably) small desire to grow. Using the latter may be useful when 

setting an aspect constraint on the center widget, because this way the 

maximum size of the center widget may be controlled without creating empty 

spaces between the widgets. 

''' 

 

def __init__(self, horizontal=None, vertical=None): 

Widget.__init__(self, horizontal, vertical) 

mw = 3.*cm 

self.left = Widget( 

horizontal=GumSpring(grow=0.15, minimal=mw), parent=self) 

self.right = Widget( 

horizontal=GumSpring(grow=0.15, minimal=mw), parent=self) 

self.top = Widget( 

vertical=GumSpring(grow=0.15, minimal=mw/golden_ratio), 

parent=self) 

self.bottom = Widget( 

vertical=GumSpring(grow=0.15, minimal=mw/golden_ratio), 

parent=self) 

self.center = Widget( 

horizontal=GumSpring(grow=0.7), vertical=GumSpring(grow=0.7), 

parent=self) 

 

def set_fixed_margins(self, left, right, top, bottom): 

'''Give margins fixed size constraints.''' 

 

self.left.set_horizontal(left, 0) 

self.right.set_horizontal(right, 0) 

self.top.set_vertical(top, 0) 

self.bottom.set_vertical(bottom, 0) 

 

def set_min_margins(self, left, right, top, bottom, grow=0.0001): 

'''Give margins a minimal size and the possibility to grow. 

 

The desire to grow is set to a very small number.''' 

self.left.set_horizontal(left, grow) 

self.right.set_horizontal(right, grow) 

self.top.set_vertical(top, grow) 

self.bottom.set_vertical(bottom, grow) 

 

def get_min_size(self): 

shs, svs = Widget.get_min_size(self) 

 

sl, sr, st, sb, sc = [x.get_min_size() for x in ( 

self.left, self.right, self.top, self.bottom, self.center)] 

gl, gr, gt, gb, gc = [x.get_grow() for x in ( 

self.left, self.right, self.top, self.bottom, self.center)] 

 

shsum = sl[0]+sr[0]+sc[0] 

svsum = st[1]+sb[1]+sc[1] 

 

# prevent widgets from collapsing 

for s, g in ((sl, gl), (sr, gr), (sc, gc)): 

if s[0] == 0.0 and g[0] != 0.0: 

shsum += 0.1*cm 

 

for s, g in ((st, gt), (sb, gb), (sc, gc)): 

if s[1] == 0.0 and g[1] != 0.0: 

svsum += 0.1*cm 

 

sh = max(shs, shsum) 

sv = max(svs, svsum) 

 

return sh, sv 

 

def get_grow(self): 

ghs, gvs = Widget.get_grow(self) 

gh = (self.left.get_grow()[0] + 

self.right.get_grow()[0] + 

self.center.get_grow()[0]) * ghs 

gv = (self.top.get_grow()[1] + 

self.bottom.get_grow()[1] + 

self.center.get_grow()[1]) * gvs 

return gh, gv 

 

def set_size(self, size, offset): 

(sh, sv), (oh, ov) = self.legalize(size, offset) 

 

sl, sr, st, sb, sc = [x.get_min_size() for x in ( 

self.left, self.right, self.top, self.bottom, self.center)] 

gl, gr, gt, gb, gc = [x.get_grow() for x in ( 

self.left, self.right, self.top, self.bottom, self.center)] 

 

ah = sh - (sl[0]+sr[0]+sc[0]) 

av = sv - (st[1]+sb[1]+sc[1]) 

 

if ah < 0.0: 

raise GmtPyError("Container not wide enough for contents " 

"(FrameLayout, available: %g cm, needed: %g cm)" 

% (sh/cm, (sl[0]+sr[0]+sc[0])/cm)) 

if av < 0.0: 

raise GmtPyError("Container not high enough for contents " 

"(FrameLayout, available: %g cm, needed: %g cm)" 

% (sv/cm, (st[1]+sb[1]+sc[1])/cm)) 

 

slh, srh, sch = distribute((sl[0], sr[0], sc[0]), 

(gl[0], gr[0], gc[0]), ah) 

stv, sbv, scv = distribute((st[1], sb[1], sc[1]), 

(gt[1], gb[1], gc[1]), av) 

 

if self.center.aspect is not None: 

ahm = sh - (sl[0]+sr[0] + scv/self.center.aspect) 

avm = sv - (st[1]+sb[1] + sch*self.center.aspect) 

if 0.0 < ahm < ah: 

slh, srh, sch = distribute( 

(sl[0], sr[0], scv/self.center.aspect), 

(gl[0], gr[0], 0.0), ahm) 

 

elif 0.0 < avm < av: 

stv, sbv, scv = distribute((st[1], sb[1], 

sch*self.center.aspect), 

(gt[1], gb[1], 0.0), avm) 

 

ah = sh - (slh+srh+sch) 

av = sv - (stv+sbv+scv) 

 

oh += ah/2. 

ov += av/2. 

sh -= ah 

sv -= av 

 

self.left.set_size((slh, scv), (oh, ov+sbv)) 

self.right.set_size((srh, scv), (oh+slh+sch, ov+sbv)) 

self.top.set_size((sh, stv), (oh, ov+sbv+scv)) 

self.bottom.set_size((sh, sbv), (oh, ov)) 

self.center.set_size((sch, scv), (oh+slh, ov+sbv)) 

Widget.set_size(self, (sh, sv), (oh, ov)) 

 

def set_widget(self, which='center', widget=None): 

 

'''Set one of the sub-widgets. 

 

``which`` should be one of ``'left'``, ``'right'``, ``'top'``, 

``'bottom'`` or ``'center'``. ''' 

 

if widget is None: 

widget = Widget() 

 

if which in ('left', 'right', 'top', 'bottom', 'center'): 

self.__dict__[which] = widget 

else: 

raise GmtPyError('No such sub-widget: %s' % which) 

 

widget.set_parent(self) 

 

def get_widget(self, which='center'): 

 

'''Get one of the sub-widgets. 

 

``which`` should be one of ``'left'``, ``'right'``, ``'top'``, 

``'bottom'`` or ``'center'``. ''' 

 

if which in ('left', 'right', 'top', 'bottom', 'center'): 

return self.__dict__[which] 

else: 

raise GmtPyError('No such sub-widget: %s' % which) 

 

def get_children(self): 

return [self.left, self.right, self.top, self.bottom, self.center] 

 

 

class GridLayout(Widget): 

 

'''A layout manager which arranges its sub-widgets in a grid. 

 

The grid spacing is flexible and based on the sizing policies of the 

contained sub-widgets. If an equidistant grid is needed, the sizing 

policies of the sub-widgets have to be set equally. 

 

The height of each row and the width of each column is derived from the 

sizing policy of the largest sub-widget in the row or column in question. 

The algorithm is not very sophisticated, so conflicting sizing policies 

might not be resolved optimally. 

''' 

 

def __init__(self, nx=2, ny=2, horizontal=None, vertical=None): 

 

'''Create new grid layout with ``nx`` columns and ``ny`` rows.''' 

 

Widget.__init__(self, horizontal, vertical) 

self.grid = [] 

for iy in range(ny): 

row = [] 

for ix in range(nx): 

w = Widget(parent=self) 

row.append(w) 

 

self.grid.append(row) 

 

def sub_min_sizes_as_array(self): 

esh = num.array( 

[[w.get_min_size()[0] for w in row] for row in self.grid], 

dtype=num.float) 

esv = num.array( 

[[w.get_min_size()[1] for w in row] for row in self.grid], 

dtype=num.float) 

return esh, esv 

 

def sub_grows_as_array(self): 

egh = num.array( 

[[w.get_grow()[0] for w in row] for row in self.grid], 

dtype=num.float) 

egv = num.array( 

[[w.get_grow()[1] for w in row] for row in self.grid], 

dtype=num.float) 

return egh, egv 

 

def get_min_size(self): 

sh, sv = Widget.get_min_size(self) 

esh, esv = self.sub_min_sizes_as_array() 

if esh.size != 0: 

sh = max(sh, num.sum(esh.max(0))) 

if esv.size != 0: 

sv = max(sv, num.sum(esv.max(1))) 

return sh, sv 

 

def get_grow(self): 

ghs, gvs = Widget.get_grow(self) 

egh, egv = self.sub_grows_as_array() 

if egh.size != 0: 

gh = num.sum(egh.max(0))*ghs 

else: 

gh = 1.0 

if egv.size != 0: 

gv = num.sum(egv.max(1))*gvs 

else: 

gv = 1.0 

return gh, gv 

 

def set_size(self, size, offset): 

(sh, sv), (oh, ov) = self.legalize(size, offset) 

esh, esv = self.sub_min_sizes_as_array() 

egh, egv = self.sub_grows_as_array() 

 

# available additional space 

empty = esh.size == 0 

 

if not empty: 

ah = sh - num.sum(esh.max(0)) 

av = sv - num.sum(esv.max(1)) 

else: 

av = sv 

ah = sh 

 

if ah < 0.0: 

raise GmtPyError("Container not wide enough for contents " 

"(GridLayout, available: %g cm, needed: %g cm)" 

% (sh/cm, (num.sum(esh.max(0)))/cm)) 

if av < 0.0: 

raise GmtPyError("Container not high enough for contents " 

"(GridLayout, available: %g cm, needed: %g cm)" 

% (sv/cm, (num.sum(esv.max(1)))/cm)) 

 

nx, ny = esh.shape 

 

if not empty: 

# distribute additional space on rows and columns 

# according to grow weights and minimal sizes 

gsh = egh.sum(1)[:, num.newaxis].repeat(ny, axis=1) 

nesh = esh.copy() 

nesh += num.where(gsh > 0.0, ah*egh/gsh, 0.0) 

 

nsh = num.maximum(nesh.max(0), esh.max(0)) 

 

gsv = egv.sum(0)[num.newaxis, :].repeat(nx, axis=0) 

nesv = esv.copy() 

nesv += num.where(gsv > 0.0, av*egv/gsv, 0.0) 

nsv = num.maximum(nesv.max(1), esv.max(1)) 

 

ah = sh - sum(nsh) 

av = sv - sum(nsv) 

 

oh += ah/2. 

ov += av/2. 

sh -= ah 

sv -= av 

 

# resize child widgets 

neov = ov + sum(nsv) 

for row, nesv in zip(self.grid, nsv): 

neov -= nesv 

neoh = oh 

for w, nesh in zip(row, nsh): 

w.set_size((nesh, nesv), (neoh, neov)) 

neoh += nesh 

 

Widget.set_size(self, (sh, sv), (oh, ov)) 

 

def set_widget(self, ix, iy, widget=None): 

 

'''Set one of the sub-widgets. 

 

Sets the sub-widget in column ``ix`` and row ``iy``. The indices are 

counted from zero. ''' 

 

if widget is None: 

widget = Widget() 

 

self.grid[iy][ix] = widget 

widget.set_parent(self) 

 

def get_widget(self, ix, iy): 

 

'''Get one of the sub-widgets. 

 

Gets the sub-widget from column ``ix`` and row ``iy``. The indices are 

counted from zero.''' 

 

return self.grid[iy][ix] 

 

def get_children(self): 

children = [] 

for row in self.grid: 

children.extend(row) 

 

return children 

 

 

def is_gmt5(version='newest'): 

return get_gmt_installation(version)['version'][0] == '5' 

 

 

def aspect_for_projection(gmtversion, *args, **kwargs): 

 

gmt = GMT(version=gmtversion, eps_mode=True) 

 

if gmt.is_gmt5(): 

gmt.psbasemap('-B+gblack', finish=True, *args, **kwargs) 

fn = gmt.tempfilename('test.eps') 

gmt.save(fn, crop_eps_mode=True) 

with open(fn, 'rb') as f: 

s = f.read() 

 

l, b, r, t = get_bbox(s) 

else: 

gmt.psbasemap('-G0', finish=True, *args, **kwargs) 

l, b, r, t = gmt.bbox() 

 

return (t-b)/(r-l) 

 

 

def text_box( 

text, font=0, font_size=12., angle=0, gmtversion='newest', **kwargs): 

 

gmt = GMT(version=gmtversion) 

if gmt.is_gmt5(): 

row = [0, 0, text] 

farg = ['-F+f%gp,%s,%s+j%s' % (font_size, font, 'black', 'BL')] 

else: 

row = [0, 0, font_size, 0, font, 'BL', text] 

farg = [] 

 

gmt.pstext( 

in_rows=[row], 

finish=True, 

R=(0, 1, 0, 1), 

J='x10p', 

N=True, 

*farg, 

**kwargs) 

 

fn = gmt.tempfilename() + '.ps' 

gmt.save(fn) 

 

(_, stderr) = subprocess.Popen( 

['gs', '-q', '-dNOPAUSE', '-dBATCH', '-r720', '-sDEVICE=bbox', fn], 

stderr=subprocess.PIPE).communicate() 

 

dx, dy = None, None 

for line in stderr.splitlines(): 

if line.startswith(b'%%HiResBoundingBox:'): 

l, b, r, t = [float(x) for x in line.split()[-4:]] 

dx, dy = r-l, t-b 

break 

 

return dx, dy 

 

 

class TableLiner(object): 

'''Utility class to turn tables into lines.''' 

 

def __init__(self, in_columns=None, in_rows=None, encoding='utf-8'): 

self.in_columns = in_columns 

self.in_rows = in_rows 

self.encoding = encoding 

 

def __iter__(self): 

if self.in_columns is not None: 

for row in zip(*self.in_columns): 

yield (' '.join([text(x) for x in row])+'\n').encode( 

self.encoding) 

 

if self.in_rows is not None: 

for row in self.in_rows: 

yield (' '.join([text(x) for x in row])+'\n').encode( 

self.encoding) 

 

 

class LineStreamChopper(object): 

'''File-like object to buffer data.''' 

 

def __init__(self, liner): 

self.chopsize = None 

self.liner = liner 

self.chop_iterator = None 

self.closed = False 

 

def _chopiter(self): 

buf = BytesIO() 

for line in self.liner: 

buf.write(line) 

buflen = buf.tell() 

if self.chopsize is not None and buflen >= self.chopsize: 

buf.seek(0) 

while buf.tell() <= buflen-self.chopsize: 

yield buf.read(self.chopsize) 

 

newbuf = BytesIO() 

newbuf.write(buf.read()) 

buf.close() 

buf = newbuf 

 

yield(buf.getvalue()) 

buf.close() 

 

def read(self, size=None): 

if self.closed: 

raise ValueError('Cannot read from closed LineStreamChopper.') 

if self.chop_iterator is None: 

self.chopsize = size 

self.chop_iterator = self._chopiter() 

 

self.chopsize = size 

try: 

return next(self.chop_iterator) 

except StopIteration: 

return '' 

 

def close(self): 

self.chopsize = None 

self.chop_iterator = None 

self.closed = True 

 

def flush(self): 

pass 

 

 

font_tab = { 

0: 'Helvetica', 

1: 'Helvetica-Bold', 

} 

 

font_tab_rev = dict((v, k) for (k, v) in font_tab.items()) 

 

 

class GMT(object): 

'''A thin wrapper to GMT command execution. 

 

A dict ``config`` may be given to override some of the default GMT 

parameters. The ``version`` argument may be used to select a specific GMT 

version, which should be used with this GMT instance. The selected 

version of GMT has to be installed on the system, must be supported by 

gmtpy and gmtpy must know where to find it. 

 

Each instance of this class is used for the task of producing one PS or PDF 

output file. 

 

Output of a series of GMT commands is accumulated in memory and can then be 

saved as PS or PDF file using the :py:meth:`save` method. 

 

GMT commands are accessed as method calls to instances of this class. See 

the :py:meth:`__getattr__` method for details on how the method's 

arguments are translated into options and arguments for the GMT command. 

 

Associated with each instance of this class, a temporary directory is 

created, where temporary files may be created, and which is automatically 

deleted, when the object is destroyed. The :py:meth:`tempfilename` method 

may be used to get a random filename in the instance's temporary directory. 

 

Any .gmtdefaults files are ignored. The GMT class uses a fixed 

set of defaults, which may be altered via an argument to the constructor. 

If possible, GMT is run in 'isolation mode', which was introduced with GMT 

version 4.2.2, by setting `GMT_TMPDIR` to the instance's temporary 

directory. With earlier versions of GMT, problems may arise with parallel 

execution of more than one GMT instance. 

 

Each instance of the GMT class may pick a specific version of GMT which 

shall be used, so that, if multiple versions of GMT are installed on the 

system, different versions of GMT can be used simultaneously such that 

backward compatibility of the scripts can be maintained. 

 

''' 

 

def __init__( 

self, 

config=None, 

kontinue=None, 

version='newest', 

config_papersize=None, 

eps_mode=False): 

 

self.installation = get_gmt_installation(version) 

self.gmt_config = dict(self.installation['defaults']) 

self.eps_mode = eps_mode 

self._shutil = shutil 

 

if config: 

self.gmt_config.update(config) 

 

if config_papersize: 

if not isinstance(config_papersize, str): 

config_papersize = 'Custom_%ix%i' % ( 

int(config_papersize[0]), int(config_papersize[1])) 

 

if self.is_gmt5(): 

self.gmt_config['PS_MEDIA'] = config_papersize 

else: 

self.gmt_config['PAPER_MEDIA'] = config_papersize 

 

self.tempdir = tempfile.mkdtemp("", "gmtpy-") 

self.gmt_config_filename = pjoin(self.tempdir, 'gmt.conf') 

self.gen_gmt_config_file(self.gmt_config_filename, self.gmt_config) 

 

if kontinue is not None: 

self.load_unfinished(kontinue) 

self.needstart = False 

else: 

self.output = BytesIO() 

self.needstart = True 

 

self.finished = False 

 

self.environ = os.environ.copy() 

self.environ['GMTHOME'] = self.installation.get('home', '') 

# GMT isolation mode: works only properly with GMT version >= 4.2.2 

self.environ['GMT_TMPDIR'] = self.tempdir 

 

self.layout = None 

self.command_log = [] 

self.keep_temp_dir = False 

 

def is_gmt5(self): 

return self.installation['version'][0] == '5' 

 

def get_version(self): 

return self.installation['version'] 

 

def get_config(self, key): 

return self.gmt_config[key] 

 

def to_points(self, string): 

if not string: 

return 0 

 

unit = string[-1] 

if unit in _units: 

return float(string[:-1])/_units[unit] 

else: 

default_unit = measure_unit(self.gmt_config).lower()[0] 

return float(string)/_units[default_unit] 

 

def label_font_size(self): 

if self.is_gmt5(): 

return self.to_points(self.gmt_config['FONT_LABEL'].split(',')[0]) 

else: 

return self.to_points(self.gmt_config['LABEL_FONT_SIZE']) 

 

def label_font(self): 

if self.is_gmt5(): 

return font_tab_rev(self.gmt_config['FONT_LABEL'].split(',')[1]) 

else: 

return self.gmt_config['LABEL_FONT'] 

 

def gen_gmt_config_file(self, config_filename, config): 

f = open(config_filename, 'wb') 

f.write( 

('#\n# GMT %s Defaults file\n' 

% self.installation['version']).encode('ascii')) 

 

for k, v in config.items(): 

f.write(('%s = %s\n' % (k, v)).encode('ascii')) 

f.close() 

 

def __del__(self): 

if not self.keep_temp_dir: 

self._shutil.rmtree(self.tempdir) 

 

def _gmtcommand(self, command, *addargs, **kwargs): 

 

'''Execute arbitrary GMT command. 

 

See docstring in __getattr__ for details. 

''' 

 

in_stream = kwargs.pop('in_stream', None) 

in_filename = kwargs.pop('in_filename', None) 

in_string = kwargs.pop('in_string', None) 

in_columns = kwargs.pop('in_columns', None) 

in_rows = kwargs.pop('in_rows', None) 

out_stream = kwargs.pop('out_stream', None) 

out_filename = kwargs.pop('out_filename', None) 

out_discard = kwargs.pop('out_discard', None) 

finish = kwargs.pop('finish', False) 

suppressdefaults = kwargs.pop('suppress_defaults', False) 

config_override = kwargs.pop('config', None) 

 

assert(not self.finished) 

 

# check for mutual exclusiveness on input and output possibilities 

assert(1 >= len( 

[x for x in [ 

in_stream, in_filename, in_string, in_columns, in_rows] 

if x is not None])) 

assert(1 >= len([x for x in [out_stream, out_filename, out_discard] 

if x is not None])) 

 

options = [] 

 

gmt_config = self.gmt_config 

if not self.is_gmt5(): 

gmt_config_filename = self.gmt_config_filename 

if config_override: 

gmt_config = self.gmt_config.copy() 

gmt_config.update(config_override) 

gmt_config_override_filename = pjoin( 

self.tempdir, 'gmtdefaults_override') 

self.gen_gmt_config_file( 

gmt_config_override_filename, gmt_config) 

gmt_config_filename = gmt_config_override_filename 

 

else: # gmt5 needs override variables as --VAR=value 

if config_override: 

for k, v in config_override.items(): 

options.append('--%s=%s' % (k, v)) 

 

if out_discard: 

out_filename = '/dev/null' 

 

out_mustclose = False 

if out_filename is not None: 

out_mustclose = True 

out_stream = open(out_filename, 'wb') 

 

if in_filename is not None: 

in_stream = open(in_filename, 'rb') 

 

if in_string is not None: 

in_stream = BytesIO(in_string) 

 

encoding_gmt = gmt_config.get( 

'PS_CHAR_ENCODING', 

gmt_config.get('CHAR_ENCODING', 'ISOLatin1+')) 

 

encoding = encoding_gmt_to_python[encoding_gmt.lower()] 

 

if in_columns is not None or in_rows is not None: 

in_stream = LineStreamChopper(TableLiner(in_columns=in_columns, 

in_rows=in_rows, 

encoding=encoding)) 

 

# convert option arguments to strings 

for k, v in kwargs.items(): 

if len(k) > 1: 

raise GmtPyError('Found illegal keyword argument "%s" ' 

'while preparing options for command "%s"' 

% (k, command)) 

 

if type(v) is bool: 

if v: 

options.append('-%s' % k) 

elif type(v) is tuple or type(v) is list: 

options.append('-%s' % k + '/'.join([str(x) for x in v])) 

else: 

options.append('-%s%s' % (k, str(v))) 

 

# if not redirecting to an external sink, handle -K -O 

if out_stream is None: 

if not finish: 

options.append('-K') 

else: 

self.finished = True 

 

if not self.needstart: 

options.append('-O') 

else: 

self.needstart = False 

 

out_stream = self.output 

 

# run the command 

if self.is_gmt5(): 

args = [pjoin(self.installation['bin'], 'gmt'), command] 

else: 

args = [pjoin(self.installation['bin'], command)] 

 

if not os.path.isfile(args[0]): 

raise OSError('No such file: %s' % args[0]) 

args.extend(options) 

args.extend(addargs) 

if not self.is_gmt5() and not suppressdefaults: 

# does not seem to work with GMT 5 (and should not be necessary 

args.append('+'+gmt_config_filename) 

 

bs = 2048 

p = subprocess.Popen(args, stdin=subprocess.PIPE, 

stdout=subprocess.PIPE, bufsize=bs, 

env=self.environ) 

while True: 

cr, cw, cx = select([p.stdout], [p.stdin], []) 

if cr: 

out_stream.write(p.stdout.read(bs)) 

if cw: 

if in_stream is not None: 

data = in_stream.read(bs) 

if len(data) == 0: 

break 

p.stdin.write(data) 

else: 

break 

if not cr and not cw: 

break 

 

p.stdin.close() 

 

while True: 

data = p.stdout.read(bs) 

if len(data) == 0: 

break 

out_stream.write(data) 

 

p.stdout.close() 

 

retcode = p.wait() 

 

if in_stream is not None: 

in_stream.close() 

 

if out_mustclose: 

out_stream.close() 

 

if retcode != 0: 

self.keep_temp_dir = True 

raise GMTError('Command %s returned an error. ' 

'While executing command:\n%s' 

% (command, escape_shell_args(args))) 

 

self.command_log.append(args) 

 

def __getattr__(self, command): 

 

'''Maps to call self._gmtcommand(command, \\*addargs, \\*\\*kwargs). 

 

Execute arbitrary GMT command. 

 

Run a GMT command and by default append its postscript output to the 

output file maintained by the GMT instance on which this method is 

called. 

 

Except for a few keyword arguments listed below, any ``kwargs`` and 

``addargs`` are converted into command line options and arguments and 

passed to the GMT command. Numbers in keyword arguments are converted 

into strings. E.g. ``S=10`` is translated into ``'-S10'``. Tuples of 

numbers or strings are converted into strings where the elements of the 

tuples are separated by slashes '/'. E.g. ``R=(10, 10, 20, 20)`` is 

translated into ``'-R10/10/20/20'``. Options with a boolean argument 

are only appended to the GMT command, if their values are True. 

 

If no output redirection is in effect, the -K and -O options are 

handled by gmtpy and thus should not be specified. Use 

``out_discard=True`` if you don't want -K or -O beeing added, but are 

not interested in the output. 

 

The standard input of the GMT process is fed by data selected with one 

of the following ``in_*`` keyword arguments: 

 

=============== ======================================================= 

``in_stream`` Data is read from an open file like object. 

``in_filename`` Data is read from the given file. 

``in_string`` String content is dumped to the process. 

``in_columns`` A 2D nested iterable whose elements can be accessed as 

``in_columns[icolumn][irow]`` is converted into an 

ascii 

table, which is fed to the process. 

``in_rows`` A 2D nested iterable whos elements can be accessed as 

``in_rows[irow][icolumn]`` is converted into an ascii 

table, which is fed to the process. 

=============== ======================================================= 

 

The standard output of the GMT process may be redirected by one of the 

following options: 

 

================= ===================================================== 

``out_stream`` Output is fed to an open file like object. 

``out_filename`` Output is dumped to the given file. 

``out_discard`` If True, output is dumped to :file:`/dev/null`. 

================= ===================================================== 

 

Additional keyword arguments: 

 

===================== ================================================= 

``config`` Dict with GMT defaults which override the 

currently active set of defaults exclusively 

during this call. 

``finish`` If True, the postscript file, which is maintained 

by the GMT instance is finished, and no further 

plotting is allowed. 

``suppress_defaults`` Suppress appending of the ``'+gmtdefaults'`` 

option to the command. 

===================== ================================================= 

 

''' 

 

def f(*args, **kwargs): 

return self._gmtcommand(command, *args, **kwargs) 

return f 

 

def tempfilename(self, name=None): 

'''Get filename for temporary file in the private temp directory. 

 

If no ``name`` argument is given, a random name is picked. If 

``name`` is given, returns a path ending in that ``name``.''' 

 

if not name: 

name = ''.join( 

[random.choice('abcdefghijklmnopqrstuvwxyz') 

for i in range(10)]) 

 

fn = pjoin(self.tempdir, name) 

return fn 

 

def tempfile(self, name=None): 

'''Create and open a file in the private temp directory.''' 

 

fn = self.tempfilename(name) 

f = open(fn, 'wb') 

return f, fn 

 

def save_unfinished(self, filename): 

out = open(filename, 'wb') 

out.write(self.output.getvalue()) 

out.close() 

 

def load_unfinished(self, filename): 

self.output = BytesIO() 

self.finished = False 

inp = open(filename, 'rb') 

self.output.write(inp.read()) 

inp.close() 

 

def dump(self, ident): 

filename = self.tempfilename('breakpoint-%s' % ident) 

self.save_unfinished(filename) 

 

def load(self, ident): 

filename = self.tempfilename('breakpoint-%s' % ident) 

self.load_unfinished(filename) 

 

def save(self, filename=None, bbox=None, resolution=150, oversample=2., 

width=None, height=None, size=None, crop_eps_mode=False, 

psconvert=False): 

 

''' 

Finish and save figure as PDF, PS or PPM file. 

 

If filename ends with ``'.pdf'`` a PDF file is created by piping the 

GMT output through :program:`gmtpy-epstopdf`. 

 

If filename ends with ``'.png'`` a PNG file is created by running 

:program:`gmtpy-epstopdf`, :program:`pdftocairo` and 

:program:`convert`. ``resolution`` specifies the resolution in DPI for 

raster file formats. Rasterization is done at a higher resolution if 

``oversample`` is set to a value higher than one. The output image size 

can also be controlled by setting ``width``, ``height`` or ``size`` 

instead of ``resolution``. When ``size`` is given, the image is scaled 

so that ``max(width, height) == size``. 

 

The bounding box is set according to the values given in ``bbox``. 

''' 

 

if not self.finished: 

self.psxy(R=True, J=True, finish=True) 

 

if filename: 

tempfn = pjoin(self.tempdir, 'incomplete') 

out = open(tempfn, 'wb') 

else: 

out = sys.stdout 

 

if bbox and not self.is_gmt5(): 

out.write(replace_bbox(bbox, self.output.getvalue())) 

else: 

out.write(self.output.getvalue()) 

 

if filename: 

out.close() 

 

if filename.endswith('.ps') or ( 

not self.is_gmt5() and filename.endswith('.eps')): 

 

shutil.move(tempfn, filename) 

return 

 

if self.is_gmt5(): 

if crop_eps_mode: 

addarg = ['-A0'] 

else: 

addarg = [] 

 

subprocess.call( 

[pjoin(self.installation['bin'], 'gmt'), 'psconvert', 

'-Te', '-F%s' % tempfn + '.eps', tempfn, ] + addarg) 

 

if bbox: 

with open(tempfn + '.eps', 'rb') as fin: 

with open(tempfn + '-fixbb.eps', 'wb') as fout: 

replace_bbox(bbox, fin, fout) 

 

shutil.move(tempfn + '-fixbb.eps', tempfn + '.eps') 

 

else: 

shutil.move(tempfn, tempfn + '.eps') 

 

if filename.endswith('.pdf'): 

if psconvert: 

gmt_bin = pjoin(self.installation['bin'], 'gmt') 

subprocess.call([gmt_bin, 'psconvert', tempfn, '-Tf', 

'-F' + filename]) 

else: 

subprocess.call(['gmtpy-epstopdf', '--res=%i' % resolution, 

'--outfile=' + filename, tempfn + '.eps']) 

else: 

subprocess.call([ 

'gmtpy-epstopdf', 

'--res=%i' % (resolution * oversample), 

'--outfile=' + tempfn + '.pdf', tempfn + '.eps']) 

 

convert_graph( 

tempfn + '.pdf', filename, 

resolution=resolution, oversample=oversample, 

size=size, width=width, height=height) 

 

def bbox(self): 

return get_bbox(self.output.getvalue()) 

 

def get_command_log(self): 

'''Get the command log.''' 

 

return self.command_log 

 

def __str__(self): 

s = '' 

for com in self.command_log: 

s += com[0] + "\n " + "\n ".join(com[1:]) + "\n\n" 

return s 

 

def page_size_points(self): 

'''Try to get paper size of output postscript file in points.''' 

 

pm = paper_media(self.gmt_config).lower() 

if pm.endswith('+') or pm.endswith('-'): 

pm = pm[:-1] 

 

orient = page_orientation(self.gmt_config).lower() 

 

if pm in all_paper_sizes(): 

 

if orient == 'portrait': 

return get_paper_size(pm) 

else: 

return get_paper_size(pm)[1], get_paper_size(pm)[0] 

 

m = re.match(r'custom_([0-9.]+)([cimp]?)x([0-9.]+)([cimp]?)', pm) 

if m: 

w, uw, h, uh = m.groups() 

w, h = float(w), float(h) 

if uw: 

w *= _units[uw] 

if uh: 

h *= _units[uh] 

if orient == 'portrait': 

return w, h 

else: 

return h, w 

 

return None, None 

 

def default_layout(self, with_palette=False): 

'''Get a default layout for the output page. 

 

One of three different layouts is choosen, depending on the 

`PAPER_MEDIA` setting in the GMT configuration dict. 

 

If `PAPER_MEDIA` ends with a ``'+'`` (EPS output is selected), a 

:py:class:`FrameLayout` is centered on the page, whose size is 

controlled by its center widget's size plus the margins of the 

:py:class:`FrameLayout`. 

 

If `PAPER_MEDIA` indicates, that a custom page size is wanted by 

starting with ``'Custom_'``, a :py:class:`FrameLayout` is used to fill 

the complete page. The center widget's size is then controlled by the 

page's size minus the margins of the :py:class:`FrameLayout`. 

 

In any other case, two FrameLayouts are nested, such that the outer 

layout attaches a 1 cm (printer) margin around the complete page, and 

the inner FrameLayout's center widget takes up as much space as 

possible under the constraint, that an aspect ratio of 1/golden_ratio 

is preserved. 

 

In any case, a reference to the innermost :py:class:`FrameLayout` 

instance is returned. The top-level layout can be accessed by calling 

:py:meth:`Widget.get_parent` on the returned layout. ''' 

 

if self.layout is None: 

w, h = self.page_size_points() 

 

if w is None or h is None: 

raise GmtPyError("Can't determine page size for layout") 

 

pm = paper_media(self.gmt_config).lower() 

 

if with_palette: 

palette_layout = GridLayout(3, 1) 

spacer = palette_layout.get_widget(1, 0) 

palette_widget = palette_layout.get_widget(2, 0) 

spacer.set_horizontal(0.5*cm) 

palette_widget.set_horizontal(0.5*cm) 

 

if pm.endswith('+') or self.eps_mode: 

outer = CenterLayout() 

outer.set_policy((w, h), (0., 0.)) 

inner = FrameLayout() 

outer.set_widget(inner) 

if with_palette: 

inner.set_widget('center', palette_layout) 

widget = palette_layout 

else: 

widget = inner.get_widget('center') 

widget.set_policy((w/golden_ratio, 0.), (0., 0.), 

aspect=1./golden_ratio) 

mw = 3.0*cm 

inner.set_fixed_margins( 

mw, mw, mw/golden_ratio, mw/golden_ratio) 

self.layout = inner 

 

elif pm.startswith('custom_'): 

layout = FrameLayout() 

layout.set_policy((w, h), (0., 0.)) 

mw = 3.0*cm 

layout.set_min_margins( 

mw, mw, mw/golden_ratio, mw/golden_ratio) 

if with_palette: 

layout.set_widget('center', palette_layout) 

self.layout = layout 

else: 

outer = FrameLayout() 

outer.set_policy((w, h), (0., 0.)) 

outer.set_fixed_margins(1.*cm, 1.*cm, 1.*cm, 1.*cm) 

 

inner = FrameLayout() 

outer.set_widget('center', inner) 

mw = 3.0*cm 

inner.set_min_margins(mw, mw, mw/golden_ratio, mw/golden_ratio) 

if with_palette: 

inner.set_widget('center', palette_layout) 

widget = palette_layout 

else: 

widget = inner.get_widget('center') 

 

widget.set_aspect(1./golden_ratio) 

 

self.layout = inner 

 

return self.layout 

 

def draw_layout(self, layout): 

'''Use psxy to draw layout; for debugging''' 

 

# corners = layout.get_corners(descend=True) 

rects = num.array(layout.get_sizes(), dtype=num.float) 

rects_wid = rects[:, 0, 0] 

rects_hei = rects[:, 0, 1] 

rects_center_x = rects[:, 1, 0] + rects_wid*0.5 

rects_center_y = rects[:, 1, 1] + rects_hei*0.5 

nrects = len(rects) 

prects = (rects_center_x, rects_center_y, num.arange(nrects), 

num.zeros(nrects), rects_hei, rects_wid) 

 

# points = num.array(corners, dtype=num.float) 

 

cptfile = self.tempfilename() + '.cpt' 

self.makecpt( 

C='ocean', 

T='%g/%g/%g' % (-nrects, nrects, 1), 

Z=True, 

out_filename=cptfile, suppress_defaults=True) 

 

bb = layout.bbox() 

self.psxy( 

in_columns=prects, 

C=cptfile, 

W='1p', 

S='J', 

R=(bb[0], bb[2], bb[1], bb[3]), 

*layout.XYJ()) 

 

 

def simpleconf_to_ax(conf, axname): 

c = {} 

x = axname 

for x in ('', axname): 

for k in ('label', 'unit', 'scaled_unit', 'scaled_unit_factor', 

'space', 'mode', 'approx_ticks', 'limits', 'masking', 'inc', 

'snap'): 

 

if x+k in conf: 

c[k] = conf[x+k] 

 

return Ax(**c) 

 

 

class DensityPlotDef(object): 

def __init__(self, data, cpt='ocean', tension=0.7, size=(640, 480), 

contour=False, method='surface', zscaler=None, **extra): 

self.data = data 

self.cpt = cpt 

self.tension = tension 

self.size = size 

self.contour = contour 

self.method = method 

self.zscaler = zscaler 

self.extra = extra 

 

 

class TextDef(object): 

def __init__( 

self, 

data, 

size=9, 

justify='MC', 

fontno=0, 

offset=(0, 0), 

color='black'): 

 

self.data = data 

self.size = size 

self.justify = justify 

self.fontno = fontno 

self.offset = offset 

self.color = color 

 

 

class Simple(object): 

def __init__(self, gmtconfig=None, gmtversion='newest', **simple_config): 

self.data = [] 

self.symbols = [] 

self.config = copy.deepcopy(simple_config) 

self.gmtconfig = gmtconfig 

self.density_plot_defs = [] 

self.text_defs = [] 

 

self.gmtversion = gmtversion 

 

self.data_x = [] 

self.symbols_x = [] 

 

self.data_y = [] 

self.symbols_y = [] 

 

self.default_config = {} 

self.set_defaults(width=15.*cm, 

height=15.*cm / golden_ratio, 

margins=(2.*cm, 2.*cm, 2.*cm, 2.*cm), 

with_palette=False, 

palette_offset=0.5*cm, 

palette_width=None, 

palette_height=None, 

zlabeloffset=2*cm, 

draw_layout=False) 

 

self.setup_defaults() 

self.fixate_widget_aspect = False 

 

def setup_defaults(self): 

pass 

 

def set_defaults(self, **kwargs): 

self.default_config.update(kwargs) 

 

def plot(self, data, symbol=''): 

self.data.append(data) 

self.symbols.append(symbol) 

 

def density_plot(self, data, **kwargs): 

dpd = DensityPlotDef(data, **kwargs) 

self.density_plot_defs.append(dpd) 

 

def text(self, data, **kwargs): 

dpd = TextDef(data, **kwargs) 

self.text_defs.append(dpd) 

 

def plot_x(self, data, symbol=''): 

self.data_x.append(data) 

self.symbols_x.append(symbol) 

 

def plot_y(self, data, symbol=''): 

self.data_y.append(data) 

self.symbols_y.append(symbol) 

 

def set(self, **kwargs): 

self.config.update(kwargs) 

 

def setup_base(self, conf): 

w = conf.pop('width') 

h = conf.pop('height') 

margins = conf.pop('margins') 

 

gmtconfig = {} 

if self.gmtconfig is not None: 

gmtconfig.update(self.gmtconfig) 

 

gmt = GMT( 

version=self.gmtversion, 

config=gmtconfig, 

config_papersize='Custom_%ix%i' % (w, h)) 

 

layout = gmt.default_layout(with_palette=conf['with_palette']) 

layout.set_min_margins(*margins) 

if conf['with_palette']: 

widget = layout.get_widget().get_widget(0, 0) 

spacer = layout.get_widget().get_widget(1, 0) 

spacer.set_horizontal(conf['palette_offset']) 

palette_widget = layout.get_widget().get_widget(2, 0) 

if conf['palette_width'] is not None: 

palette_widget.set_horizontal(conf['palette_width']) 

if conf['palette_height'] is not None: 

palette_widget.set_vertical(conf['palette_height']) 

widget.set_vertical(h-margins[2]-margins[3]-0.03*cm) 

return gmt, layout, widget, palette_widget 

else: 

widget = layout.get_widget() 

return gmt, layout, widget, None 

 

def setup_projection(self, widget, scaler, conf): 

pass 

 

def setup_scaling(self, conf): 

ndims = 2 

if self.density_plot_defs: 

ndims = 3 

 

axes = [simpleconf_to_ax(conf, x) for x in 'xyz'[:ndims]] 

 

data_all = [] 

data_all.extend(self.data) 

for dsd in self.density_plot_defs: 

if dsd.zscaler is None: 

data_all.append(dsd.data) 

else: 

data_all.append(dsd.data[:2]) 

data_chopped = [ds[:ndims] for ds in data_all] 

 

scaler = ScaleGuru(data_chopped, axes=axes[:ndims]) 

 

self.setup_scaling_plus(scaler, axes[:ndims]) 

 

return scaler 

 

def setup_scaling_plus(self, scaler, axes): 

pass 

 

def setup_scaling_extra(self, scaler, conf): 

 

scaler_x = scaler.copy() 

scaler_x.data_ranges[1] = (0., 1.) 

scaler_x.axes[1].mode = 'off' 

 

scaler_y = scaler.copy() 

scaler_y.data_ranges[0] = (0., 1.) 

scaler_y.axes[0].mode = 'off' 

 

return scaler_x, scaler_y 

 

def draw_density(self, gmt, widget, scaler): 

 

R = scaler.R() 

# par = scaler.get_params() 

rxyj = R + widget.XYJ() 

innerticks = False 

for dpd in self.density_plot_defs: 

 

fn_cpt = gmt.tempfilename() + '.cpt' 

 

if dpd.zscaler is not None: 

s = dpd.zscaler 

else: 

s = scaler 

 

gmt.makecpt(C=dpd.cpt, out_filename=fn_cpt, *s.T()) 

 

fn_grid = gmt.tempfilename() 

 

fn_mean = gmt.tempfilename() 

 

if dpd.method in ('surface', 'triangulate'): 

gmt.blockmean(in_columns=dpd.data, 

I='%i+/%i+' % dpd.size, # noqa 

out_filename=fn_mean, *R) 

 

if dpd.method == 'surface': 

gmt.surface( 

in_filename=fn_mean, 

T=dpd.tension, 

G=fn_grid, 

I='%i+/%i+' % dpd.size, # noqa 

out_discard=True, 

*R) 

 

if dpd.method == 'triangulate': 

gmt.triangulate( 

in_filename=fn_mean, 

G=fn_grid, 

I='%i+/%i+' % dpd.size, # noqa 

out_discard=True, 

V=True, 

*R) 

 

if gmt.is_gmt5(): 

gmt.grdimage(fn_grid, C=fn_cpt, E='i', n='l', *rxyj) 

 

else: 

gmt.grdimage(fn_grid, C=fn_cpt, E='i', S='l', *rxyj) 

 

if dpd.contour: 

gmt.grdcontour(fn_grid, C=fn_cpt, W='0.5p,black', *rxyj) 

innerticks = '0.5p,black' 

 

os.remove(fn_grid) 

os.remove(fn_mean) 

 

if dpd.method == 'fillcontour': 

extra = dict(C=fn_cpt) 

extra.update(dpd.extra) 

gmt.pscontour(in_columns=dpd.data, 

I=True, *rxyj, **extra) # noqa 

 

if dpd.method == 'contour': 

extra = dict(W='0.5p,black', C=fn_cpt) 

extra.update(dpd.extra) 

gmt.pscontour(in_columns=dpd.data, *rxyj, **extra) 

 

return fn_cpt, innerticks 

 

def draw_basemap(self, gmt, widget, scaler): 

gmt.psbasemap(*(widget.JXY() + scaler.RB(ax_projection=True))) 

 

def draw(self, gmt, widget, scaler): 

rxyj = scaler.R() + widget.JXY() 

for dat, sym in zip(self.data, self.symbols): 

gmt.psxy(in_columns=dat, *(sym.split()+rxyj)) 

 

def post_draw(self, gmt, widget, scaler): 

pass 

 

def pre_draw(self, gmt, widget, scaler): 

pass 

 

def draw_extra(self, gmt, widget, scaler_x, scaler_y): 

 

for dat, sym in zip(self.data_x, self.symbols_x): 

gmt.psxy(in_columns=dat, 

*(sym.split() + scaler_x.R() + widget.JXY())) 

 

for dat, sym in zip(self.data_y, self.symbols_y): 

gmt.psxy(in_columns=dat, 

*(sym.split() + scaler_y.R() + widget.JXY())) 

 

def draw_text(self, gmt, widget, scaler): 

 

rxyj = scaler.R() + widget.JXY() 

for td in self.text_defs: 

x, y = td.data[0:2] 

text = td.data[-1] 

size = td.size 

angle = 0 

fontno = td.fontno 

justify = td.justify 

color = td.color 

if gmt.is_gmt5(): 

gmt.pstext( 

in_rows=[(x, y, text)], 

F='+f%gp,%s,%s+a%g+j%s' % ( 

size, fontno, color, angle, justify), 

D='%gp/%gp' % td.offset, *rxyj) 

else: 

gmt.pstext( 

in_rows=[(x, y, size, angle, fontno, justify, text)], 

D='%gp/%gp' % td.offset, *rxyj) 

 

def save(self, filename, resolution=150): 

 

conf = dict(self.default_config) 

conf.update(self.config) 

 

gmt, layout, widget, palette_widget = self.setup_base(conf) 

scaler = self.setup_scaling(conf) 

scaler_x, scaler_y = self.setup_scaling_extra(scaler, conf) 

 

self.setup_projection(widget, scaler, conf) 

if self.fixate_widget_aspect: 

aspect = aspect_for_projection( 

gmt.installation['version'], *(widget.J() + scaler.R())) 

 

widget.set_aspect(aspect) 

 

if conf['draw_layout']: 

gmt.draw_layout(layout) 

cptfile = None 

if self.density_plot_defs: 

cptfile, innerticks = self.draw_density(gmt, widget, scaler) 

self.pre_draw(gmt, widget, scaler) 

self.draw(gmt, widget, scaler) 

self.post_draw(gmt, widget, scaler) 

self.draw_extra(gmt, widget, scaler_x, scaler_y) 

self.draw_text(gmt, widget, scaler) 

self.draw_basemap(gmt, widget, scaler) 

 

if palette_widget and cptfile: 

nice_palette(gmt, palette_widget, scaler, cptfile, 

innerticks=innerticks, 

zlabeloffset=conf['zlabeloffset']) 

 

gmt.save(filename, resolution=resolution) 

 

 

class LinLinPlot(Simple): 

pass 

 

 

class LogLinPlot(Simple): 

 

def setup_defaults(self): 

self.set_defaults(xmode='min-max') 

 

def setup_projection(self, widget, scaler, conf): 

widget['J'] = '-JX%(width)gpl/%(height)gp' 

scaler['B'] = '-B2:%(xlabel)s:/%(yinc)g:%(ylabel)s:WSen' 

 

 

class LinLogPlot(Simple): 

 

def setup_defaults(self): 

self.set_defaults(ymode='min-max') 

 

def setup_projection(self, widget, scaler, conf): 

widget['J'] = '-JX%(width)gp/%(height)gpl' 

scaler['B'] = '-B%(xinc)g:%(xlabel)s:/2:%(ylabel)s:WSen' 

 

 

class LogLogPlot(Simple): 

 

def setup_defaults(self): 

self.set_defaults(mode='min-max') 

 

def setup_projection(self, widget, scaler, conf): 

widget['J'] = '-JX%(width)gpl/%(height)gpl' 

scaler['B'] = '-B2:%(xlabel)s:/2:%(ylabel)s:WSen' 

 

 

class AziDistPlot(Simple): 

 

def __init__(self, *args, **kwargs): 

Simple.__init__(self, *args, **kwargs) 

self.fixate_widget_aspect = True 

 

def setup_defaults(self): 

self.set_defaults( 

height=15.*cm, 

width=15.*cm, 

xmode='off', 

xlimits=(0., 360.), 

xinc=45.) 

 

def setup_projection(self, widget, scaler, conf): 

widget['J'] = '-JPa%(width)gp' 

 

def setup_scaling_plus(self, scaler, axes): 

scaler['B'] = '-B%(xinc)g:%(xlabel)s:/%(yinc)g:%(ylabel)s:N' 

 

 

class MPlot(Simple): 

 

def __init__(self, *args, **kwargs): 

Simple.__init__(self, *args, **kwargs) 

self.fixate_widget_aspect = True 

 

def setup_defaults(self): 

self.set_defaults(xmode='min-max', ymode='min-max') 

 

def setup_projection(self, widget, scaler, conf): 

par = scaler.get_params() 

lon0 = (par['xmin'] + par['xmax'])/2. 

lat0 = (par['ymin'] + par['ymax'])/2. 

sll = '%g/%g' % (lon0, lat0) 

widget['J'] = '-JM' + sll + '/%(width)gp' 

scaler['B'] = \ 

'-B%(xinc)gg%(xinc)g:%(xlabel)s:/%(yinc)gg%(yinc)g:%(ylabel)s:WSen' 

 

 

def nice_palette(gmt, widget, scaleguru, cptfile, zlabeloffset=0.8*inch, 

innerticks=True): 

 

par = scaleguru.get_params() 

par_ax = scaleguru.get_params(ax_projection=True) 

nz_palette = int(widget.height()/inch * 300) 

px = num.zeros(nz_palette*2) 

px[1::2] += 1 

pz = num.linspace(par['zmin'], par['zmax'], nz_palette).repeat(2) 

pdz = pz[2]-pz[0] 

palgrdfile = gmt.tempfilename() 

pal_r = (0, 1, par['zmin'], par['zmax']) 

pal_ax_r = (0, 1, par_ax['zmin'], par_ax['zmax']) 

gmt.xyz2grd( 

G=palgrdfile, R=pal_r, 

I=(1, pdz), in_columns=(px, pz, pz), # noqa 

out_discard=True) 

 

gmt.grdimage(palgrdfile, R=pal_r, C=cptfile, *widget.JXY()) 

if isinstance(innerticks, str): 

tickpen = innerticks 

gmt.grdcontour(palgrdfile, W=tickpen, R=pal_r, C=cptfile, 

*widget.JXY()) 

 

negpalwid = '%gp' % -widget.width() 

if not isinstance(innerticks, str) and innerticks: 

ticklen = negpalwid 

else: 

ticklen = '0p' 

 

TICK_LENGTH_PARAM = 'MAP_TICK_LENGTH' if gmt.is_gmt5() else 'TICK_LENGTH' 

gmt.psbasemap( 

R=pal_ax_r, B='4::/%(zinc)g::nsw' % par_ax, 

config={TICK_LENGTH_PARAM: ticklen}, 

*widget.JXY()) 

 

if innerticks: 

gmt.psbasemap( 

R=pal_ax_r, B='4::/%(zinc)g::E' % par_ax, 

config={TICK_LENGTH_PARAM: '0p'}, 

*widget.JXY()) 

else: 

gmt.psbasemap(R=pal_ax_r, B='4::/%(zinc)g::E' % par_ax, *widget.JXY()) 

 

if par_ax['zlabel']: 

label_font = gmt.label_font() 

label_font_size = gmt.label_font_size() 

label_offset = zlabeloffset 

gmt.pstext( 

R=(0, 1, 0, 2), D="%gp/0p" % label_offset, 

N=True, 

in_rows=[(1, 1, label_font_size, -90, label_font, 'CB', 

par_ax['zlabel'])], 

*widget.JXY())