/usr/lib/python3/dist-packages/matplotlib/backends/backend_qt4.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 | from __future__ import (absolute_import, division, print_function,
unicode_literals)
from matplotlib.externals import six
from matplotlib.externals.six import unichr
import os
import re
import signal
import sys
import matplotlib
from matplotlib.cbook import is_string_like
from matplotlib.backend_bases import FigureManagerBase
from matplotlib.backend_bases import FigureCanvasBase
from matplotlib.backend_bases import NavigationToolbar2
from matplotlib.backend_bases import cursors
from matplotlib.backend_bases import TimerBase
from matplotlib.backend_bases import ShowBase
from matplotlib._pylab_helpers import Gcf
from matplotlib.figure import Figure
from matplotlib.widgets import SubplotTool
try:
import matplotlib.backends.qt_editor.figureoptions as figureoptions
except ImportError:
figureoptions = None
from .qt_compat import QtCore, QtWidgets, _getSaveFileName, __version__
from matplotlib.backends.qt_editor.formsubplottool import UiSubplotTool
from .backend_qt5 import (backend_version, SPECIAL_KEYS, SUPER, ALT, CTRL,
SHIFT, MODIFIER_KEYS, fn_name, cursord,
draw_if_interactive, _create_qApp, show, TimerQT,
MainWindow, FigureManagerQT, NavigationToolbar2QT,
SubplotToolQt, error_msg_qt, exception_handler)
from .backend_qt5 import FigureCanvasQT as FigureCanvasQT5
DEBUG = False
def new_figure_manager(num, *args, **kwargs):
"""
Create a new figure manager instance
"""
thisFig = Figure(*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 = FigureCanvasQT(figure)
manager = FigureManagerQT(canvas, num)
return manager
class FigureCanvasQT(FigureCanvasQT5):
def __init__(self, figure):
if DEBUG:
print('FigureCanvasQt qt4: ', figure)
_create_qApp()
# Note different super-calling style to backend_qt5
QtWidgets.QWidget.__init__(self)
FigureCanvasBase.__init__(self, figure)
self.figure = figure
self.setMouseTracking(True)
self._idle = True
w, h = self.get_width_height()
self.resize(w, h)
def wheelEvent(self, event):
x = event.x()
# flipy so y=0 is bottom of canvas
y = self.figure.bbox.height - event.y()
# from QWheelEvent::delta doc
steps = event.delta()/120
if (event.orientation() == QtCore.Qt.Vertical):
FigureCanvasBase.scroll_event(self, x, y, steps)
if DEBUG:
print('scroll event: delta = %i, '
'steps = %i ' % (event.delta(), steps))
FigureCanvas = FigureCanvasQT
FigureManager = FigureManagerQT
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