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Fix Qt canvas resize_event #1585

Merged
merged 1 commit into from

4 participants

@tonysyu

The Qt backend doesn't fire resize_event when resizing so callbacks connected to the event never get called. The following example should print when the figure is resized:

import matplotlib as mpl
mpl.use('Qt4Agg')
import matplotlib.pyplot as plt

def printer(event):
    print('callback')

fig = plt.figure()
fig.canvas.mpl_connect('resize_event', printer)
plt.show()

This PR just adds a call to resize_event. (Some slight refactoring also wandered into the commit.)

@pelson
Matplotlib Developers member

:+1: good work @tonysyu.

@mdboom
Matplotlib Developers member

Merging (and backporting to v1.2.x)

@mdboom mdboom merged commit 80a406c into matplotlib:master

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@tacaswell
Matplotlib Developers member

This was cherry-picked as f6fcb39

(tracked it down, might as well record it)

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Commits on Dec 11, 2012
  1. @tonysyu
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Showing with 5 additions and 3 deletions.
  1. +5 −3 lib/matplotlib/backends/backend_qt4.py
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8 lib/matplotlib/backends/backend_qt4.py
@@ -289,15 +289,17 @@ def keyReleaseEvent( self, event ):
FigureCanvasBase.key_release_event( self, key )
if DEBUG: print('key release', key)
- def resizeEvent( self, event ):
- if DEBUG: print('resize (%d x %d)' % (event.size().width(), event.size().height()))
+ def resizeEvent(self, event):
w = event.size().width()
h = event.size().height()
- if DEBUG: print("FigureCanvasQtAgg.resizeEvent(", w, ",", h, ")")
+ if DEBUG:
+ print('resize (%d x %d)' % (w, h))
+ print("FigureCanvasQt.resizeEvent(%d, %d)" % (w, h))
dpival = self.figure.dpi
winch = w/dpival
hinch = h/dpival
self.figure.set_size_inches( winch, hinch )
+ FigureCanvasBase.resize_event(self)
self.draw()
self.update()
QtGui.QWidget.resizeEvent(self, event)
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