Problem with figure sizes using Qt4Agg

Hello,

Could someone confirm me if there is any malfunctioning using these simple figure functions?

plt.figure(figsize=(2,3))

plt.figure(figsize=(5,6))

plt.figure(figsize=(9,15))

plt.figure(figsize=(19,5))

For some reason I can’t get Qt4Agg creating last two figures in specified sizes. (WXAgg works fine.)

matplotlib.version
‘1.0.svn’

matplotlib.revision
‘$Revision: 8226 $’

from PyQt4 import QtCore
QtCore.PYQT_VERSION_STR
‘4.7’

Thanks

···


Gökhan

I can reproduce this behavior with a pure pyqt4 example with no mpl
code, see below. I asked for advice on the pyqt mailing list.

import sys
from PyQt4 import QtCore, QtGui

class Test(QtGui.QWidget):

   def __init__(self, width, height):
       QtGui.QWidget.__init__(self)
       #self.setSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Fixed)
       print 'Central widget should have width=%d, height=%d' %(width, height)
       self._width = width
       self._height = height

   def sizeHint(self):
       return QtCore.QSize(self._width, self._height)

app = QtGui.QApplication([])
m = QtGui.QMainWindow()
c = Test(1000, 700)
m.setCentralWidget(c)
m.show()
s = c.size()
print 'but central widget has width=%d, height=%d'% (s.width(), s.height())
sys.exit(app.exec_())

···

On Tue, Apr 13, 2010 at 8:14 PM, Gökhan Sever <gokhansever@...287...> wrote:

Hello,

Could someone confirm me if there is any malfunctioning using these simple
figure functions?

plt.figure(figsize=(2,3))

plt.figure(figsize=(5,6))

plt.figure(figsize=(9,15))

plt.figure(figsize=(19,5))

For some reason I can't get Qt4Agg creating last two figures in specified
sizes. (WXAgg works fine.)

matplotlib.__version__
'1.0.svn'

matplotlib.__revision__
'$Revision: 8226 $'

from PyQt4 import QtCore
QtCore.PYQT_VERSION_STR
'4.7'

Same here with your sample:

Central widget should have width=1000, height=700
but central widget has width=960, height=600

I resorted to WXAgg for the time being. Waiting for some updates till I hear a resolution. The annoying part is when I created a plot using specified width and height Qt4Agg doesn’t follow these dimensions as in this case and resulting savefig(file.pdf) produces wrongly sized file unless I manually extend the figure area and re-issue a savefig afterwards.

···

On Sun, Apr 18, 2010 at 11:47 AM, Darren Dale <dsdale24@…287…> wrote:

On Tue, Apr 13, 2010 at 8:14 PM, Gökhan Sever <gokhansever@…287…> wrote:

Hello,

Could someone confirm me if there is any malfunctioning using these simple

figure functions?

plt.figure(figsize=(2,3))

plt.figure(figsize=(5,6))

plt.figure(figsize=(9,15))

plt.figure(figsize=(19,5))

For some reason I can’t get Qt4Agg creating last two figures in specified

sizes. (WXAgg works fine.)

matplotlib.version

‘1.0.svn’

matplotlib.revision

‘$Revision: 8226 $’

from PyQt4 import QtCore

QtCore.PYQT_VERSION_STR

‘4.7’

I can reproduce this behavior with a pure pyqt4 example with no mpl

code, see below. I asked for advice on the pyqt mailing list.

import sys

from PyQt4 import QtCore, QtGui

class Test(QtGui.QWidget):

def init(self, width, height):

   QtGui.QWidget.__init__(self)

   #self.setSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Fixed)

   print 'Central widget should have width=%d, height=%d' %(width, height)

   self._width = width

   self._height = height

def sizeHint(self):

   return QtCore.QSize(self._width, self._height)

app = QtGui.QApplication([])

m = QtGui.QMainWindow()

c = Test(1000, 700)

m.setCentralWidget©

m.show()

s = c.size()

print ‘but central widget has width=%d, height=%d’% (s.width(), s.height())

sys.exit(app.exec_())


Gökhan

I got a suggestion at the PyQt4 mailing list, and the following patch
appears to resolve the problem. However, before I commit the change,
I'd like to hear from John or Andrew: What is the protocol for dealing
with a change that may affect unit tests?

Darren

Index: lib/matplotlib/backends/backend_qt4.py

···

On Sun, Apr 18, 2010 at 12:55 PM, Gökhan Sever <gokhansever@...287...> wrote:

On Sun, Apr 18, 2010 at 11:47 AM, Darren Dale <dsdale24@...287...> wrote:

On Tue, Apr 13, 2010 at 8:14 PM, Gökhan Sever <gokhansever@...1896....> >> wrote:
> Hello,
>
> Could someone confirm me if there is any malfunctioning using these
> simple
> figure functions?
>
> plt.figure(figsize=(2,3))
>
> plt.figure(figsize=(5,6))
>
> plt.figure(figsize=(9,15))
>
> plt.figure(figsize=(19,5))
>
> For some reason I can't get Qt4Agg creating last two figures in
> specified
> sizes. (WXAgg works fine.)
>
> matplotlib.__version__
> '1.0.svn'
>
> matplotlib.__revision__
> '$Revision: 8226 $'
>
> from PyQt4 import QtCore
> QtCore.PYQT_VERSION_STR
> '4.7'

I can reproduce this behavior with a pure pyqt4 example with no mpl
code, see below. I asked for advice on the pyqt mailing list.

import sys
from PyQt4 import QtCore, QtGui

class Test(QtGui.QWidget):

def __init__(self, width, height):
QtGui.QWidget.__init__(self)
#self.setSizePolicy(QtGui.QSizePolicy.Fixed,
QtGui.QSizePolicy.Fixed)
print 'Central widget should have width=%d, height=%d' %(width,
height)
self._width = width
self._height = height

def sizeHint(self):
return QtCore.QSize(self._width, self._height)

app = QtGui.QApplication([])
m = QtGui.QMainWindow()
c = Test(1000, 700)
m.setCentralWidget(c)
m.show()
s = c.size()
print 'but central widget has width=%d, height=%d'% (s.width(),
s.height())
sys.exit(app.exec_())

Same here with your sample:

Central widget should have width=1000, height=700
but central widget has width=960, height=600

I resorted to WXAgg for the time being. Waiting for some updates till I hear
a resolution. The annoying part is when I created a plot using specified
width and height Qt4Agg doesn't follow these dimensions as in this case and
resulting savefig(file.pdf) produces wrongly sized file unless I manually
extend the figure area and re-issue a savefig afterwards.

===================================================================
--- lib/matplotlib/backends/backend_qt4.py (revision 8292)
+++ lib/matplotlib/backends/backend_qt4.py (working copy)
@@ -318,6 +318,11 @@
         QtCore.QObject.connect(self.toolbar, QtCore.SIGNAL("message"),
                 self.window.statusBar().showMessage)

+ cs = canvas.sizeHint()
+ tbs = self.toolbar.sizeHint()
+ sbs = self.window.statusBar().sizeHint()
+ self.window.resize(cs.width(), cs.height()+tbs.height()+sbs.height())
+
         self.window.setCentralWidget(self.canvas)

         if matplotlib.is_interactive():

> Hello,
>
> Could someone confirm me if there is any malfunctioning using these
> simple
> figure functions?
>
> plt.figure(figsize=(2,3))
>
> plt.figure(figsize=(5,6))
>
> plt.figure(figsize=(9,15))
>
> plt.figure(figsize=(19,5))
>
> For some reason I can't get Qt4Agg creating last two figures in
> specified
> sizes. (WXAgg works fine.)
>
> matplotlib.__version__
> '1.0.svn'
>
> matplotlib.__revision__
> '$Revision: 8226 $'
>
> from PyQt4 import QtCore
> QtCore.PYQT_VERSION_STR
> '4.7'

I can reproduce this behavior with a pure pyqt4 example with no mpl
code, see below. I asked for advice on the pyqt mailing list.

import sys
from PyQt4 import QtCore, QtGui

class Test(QtGui.QWidget):

def __init__(self, width, height):
QtGui.QWidget.__init__(self)
#self.setSizePolicy(QtGui.QSizePolicy.Fixed,
QtGui.QSizePolicy.Fixed)
print 'Central widget should have width=%d, height=%d' %(width,
height)
self._width = width
self._height = height

def sizeHint(self):
return QtCore.QSize(self._width, self._height)

app = QtGui.QApplication([])
m = QtGui.QMainWindow()
c = Test(1000, 700)
m.setCentralWidget(c)
m.show()
s = c.size()
print 'but central widget has width=%d, height=%d'% (s.width(),
s.height())
sys.exit(app.exec_())

Same here with your sample:

Central widget should have width=1000, height=700
but central widget has width=960, height=600

I resorted to WXAgg for the time being. Waiting for some updates till I hear
a resolution. The annoying part is when I created a plot using specified
width and height Qt4Agg doesn't follow these dimensions as in this case and
resulting savefig(file.pdf) produces wrongly sized file unless I manually
extend the figure area and re-issue a savefig afterwards.

I got a suggestion at the PyQt4 mailing list, and the following patch
appears to resolve the problem. However, before I commit the change,
I'd like to hear from John or Andrew: What is the protocol for dealing
with a change that may affect unit tests?

This shouldn't affects tests I don't think because it is a change to a
GUI backend and we are only doing unit tests on hardcopy images at
this point.

In general, run matplotlib.test

  > python -c 'import matplotlib; matplotlib.test()'

and look to see if any tests are failing. If any are, either fix the
problem or if you decide the baseline image is broken update that in
lib/matplotlib/tests/baseline_images. There is more in
doc/devel/coding_guide.rst under "Testing". Andrew may have more to
add...

JDH

···

On Mon, May 3, 2010 at 4:02 PM, Darren Dale <dsdale24@...287...> wrote:

On Sun, Apr 18, 2010 at 12:55 PM, Gökhan Sever <gokhansever@...287...> wrote:

On Sun, Apr 18, 2010 at 11:47 AM, Darren Dale <dsdale24@...287...> wrote:

On Tue, Apr 13, 2010 at 8:14 PM, Gökhan Sever <gokhansever@...287...> >>> wrote:

Thanks Darren.

Your patch fixes the wrong sized figure creation problem. Both for WXAgg and Qt4Agg the maximum figure size is limited with the physical screen dimensions, right? Just out of curiosity I am asking this. I don’t see any scroll-bars appearing if one figure dimension is bigger than screen’s.

···

On Mon, May 3, 2010 at 4:02 PM, Darren Dale <dsdale24@…878…287…> wrote:

I got a suggestion at the PyQt4 mailing list, and the following patch

appears to resolve the problem.

Darren


Gökhan

The change was committed in svn 8294. No, the figure windows are not
designed to include scrollbars if the canvas is bigger than the window
will allow. I don't think such a feature would be compatible with the
current ability to resize a canvas by resizing the figure window.

Darren

···

On Tue, May 4, 2010 at 10:58 AM, Gökhan Sever <gokhansever@...287...> wrote:

On Mon, May 3, 2010 at 4:02 PM, Darren Dale <dsdale24@...287...> wrote:

I got a suggestion at the PyQt4 mailing list, and the following patch
appears to resolve the problem.

Darren

Thanks Darren.

Your patch fixes the wrong sized figure creation problem. Both for WXAgg and
Qt4Agg the maximum figure size is limited with the physical screen
dimensions, right? Just out of curiosity I am asking this. I don't see any
scroll-bars appearing if one figure dimension is bigger than screen's.