/usr/lib/python3/dist-packages/matplotlib/backends/backend_gtk3agg.py is in python3-matplotlib 1.5.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | from __future__ import (absolute_import, division, print_function,
unicode_literals)
from matplotlib.externals import six
import numpy as np
import sys
import warnings
from . import backend_agg
from . import backend_gtk3
from .backend_cairo import cairo, HAS_CAIRO_CFFI
from matplotlib.figure import Figure
from matplotlib import transforms
if six.PY3 and not HAS_CAIRO_CFFI:
warnings.warn(
"The Gtk3Agg backend is known to not work on Python 3.x with pycairo. "
"Try installing cairocffi.")
class FigureCanvasGTK3Agg(backend_gtk3.FigureCanvasGTK3,
backend_agg.FigureCanvasAgg):
def __init__(self, figure):
backend_gtk3.FigureCanvasGTK3.__init__(self, figure)
self._bbox_queue = []
def _renderer_init(self):
pass
def _render_figure(self, width, height):
backend_agg.FigureCanvasAgg.draw(self)
def on_draw_event(self, widget, ctx):
""" GtkDrawable draw event, like expose_event in GTK 2.X
"""
allocation = self.get_allocation()
w, h = allocation.width, allocation.height
if not len(self._bbox_queue):
if self._need_redraw:
self._render_figure(w, h)
bbox_queue = [transforms.Bbox([[0, 0], [w, h]])]
else:
return
else:
bbox_queue = self._bbox_queue
if HAS_CAIRO_CFFI:
ctx = cairo.Context._from_pointer(
cairo.ffi.cast('cairo_t **',
id(ctx) + object.__basicsize__)[0],
incref=True)
for bbox in bbox_queue:
area = self.copy_from_bbox(bbox)
buf = np.fromstring(area.to_string_argb(), dtype='uint8')
x = int(bbox.x0)
y = h - int(bbox.y1)
width = int(bbox.x1) - int(bbox.x0)
height = int(bbox.y1) - int(bbox.y0)
if HAS_CAIRO_CFFI:
image = cairo.ImageSurface.create_for_data(
buf.data, cairo.FORMAT_ARGB32, width, height)
else:
image = cairo.ImageSurface.create_for_data(
buf, cairo.FORMAT_ARGB32, width, height)
ctx.set_source_surface(image, x, y)
ctx.paint()
if len(self._bbox_queue):
self._bbox_queue = []
return False
def blit(self, bbox=None):
# If bbox is None, blit the entire canvas to gtk. Otherwise
# blit only the area defined by the bbox.
if bbox is None:
bbox = self.figure.bbox
allocation = self.get_allocation()
w, h = allocation.width, allocation.height
x = int(bbox.x0)
y = h - int(bbox.y1)
width = int(bbox.x1) - int(bbox.x0)
height = int(bbox.y1) - int(bbox.y0)
self._bbox_queue.append(bbox)
self.queue_draw_area(x, y, width, height)
def print_png(self, filename, *args, **kwargs):
# Do this so we can save the resolution of figure in the PNG file
agg = self.switch_backends(backend_agg.FigureCanvasAgg)
return agg.print_png(filename, *args, **kwargs)
class FigureManagerGTK3Agg(backend_gtk3.FigureManagerGTK3):
pass
def new_figure_manager(num, *args, **kwargs):
"""
Create a new figure manager instance
"""
FigureClass = kwargs.pop('FigureClass', Figure)
thisFig = FigureClass(*args, **kwargs)
return new_figure_manager_given_figure(num, thisFig)
def new_figure_manager_given_figure(num, figure):
"""
Create a new figure manager instance for the given figure.
"""
canvas = FigureCanvasGTK3Agg(figure)
manager = FigureManagerGTK3Agg(canvas, num)
return manager
FigureCanvas = FigureCanvasGTK3Agg
FigureManager = FigureManagerGTK3Agg
show = backend_gtk3.show
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