core dumped using NavigationToolbar with PySide

Community matplotlib-users
1

Hello,

I think I found a bug using NavigationToolbar with Pyside.

******** my system ********

OS: ubuntu 12.04

`uname -a`: Linux parcouss-M720T-M730T 3.2.0-26-generic-pae #41-Ubuntu SMP Thu Jun 14 16:45:14 UTC 2012 i686 i686 i386 GNU/Linux

matplotlib version: 1.1.1rc (ubuntu distribution package)

PySide version: 1.1.0 (ubuntu distribution package)

******** how to reproduce the bug ********

Here is a simple script to get the core dumped crash:

import matplotlib

matplotlib.use('Qt4Agg')
matplotlib.rcParams['backend.qt4']='PySide'

from matplotlib.figure import Figure
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar

from PySide.QtGui import QWidget, QVBoxLayout , QApplication
import sys

class Main(QWidget):
    def __init__(self):
        QWidget.__init__(self)
        self.setLayout(QVBoxLayout())
        self.canvas = FigureCanvas(Figure())
        self.toolbar = NavigationToolbar(self.canvas, self)
        self.layout().addWidget(self.toolbar)
        self.layout().addWidget(self.canvas)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    m = Main()
    m.show()
    app.exec_()

It may be relative to a mousemoveent, as it does not
crash until I move the mouse on the window.

Julien Pages

BTW: thanks to the really great matplotlib framework :slight_smile:

2

Hello again,

I found that the crash is a PySide 1.1.0 bug: https://groups.google.com/forum/?fromgroups#!topic/pyside/dNSzyupTFMU

It seems to be fixed in newer versions of PySide. Until I get it packaged on my ubuntu I have to change my code like this:

from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as _NavigationToolbar
from matplotlib.backends.backend_qt4 import cursord

from PySide.QtGui import QWidget, QVBoxLayout, QApplication, QCursor

class NavigationToolbar(_NavigationToolbar):
    def set_cursor( self, cursor ):
        QApplication.restoreOverrideCursor()
        qcursor = QCursor()
        qcursor.setShape(cursord[cursor])
        QApplication.setOverrideCursor( qcursor )

----- Mail original -----

···

De: "julien parc" <julien.parc@...185...>
À: matplotlib-users@lists.sourceforge.net
Envoyé: Dimanche 15 Juillet 2012 12:07:33
Objet: [Matplotlib-users] core dumped using NavigationToolbar with PySide

Hello,

I think I found a bug using NavigationToolbar with Pyside.

******** my system ********

OS: ubuntu 12.04

`uname -a`: Linux parcouss-M720T-M730T 3.2.0-26-generic-pae #41-Ubuntu SMP Thu Jun 14 16:45:14 UTC 2012 i686 i686 i386 GNU/Linux

matplotlib version: 1.1.1rc (ubuntu distribution package)

PySide version: 1.1.0 (ubuntu distribution package)

******** how to reproduce the bug ********

Here is a simple script to get the core dumped crash:

import matplotlib

matplotlib.use('Qt4Agg')
matplotlib.rcParams['backend.qt4']='PySide'

from matplotlib.figure import Figure
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar

from PySide.QtGui import QWidget, QVBoxLayout , QApplication
import sys

class Main(QWidget):
    def __init__(self):
        QWidget.__init__(self)
        self.setLayout(QVBoxLayout())
        self.canvas = FigureCanvas(Figure())
        self.toolbar = NavigationToolbar(self.canvas, self)
        self.layout().addWidget(self.toolbar)
        self.layout().addWidget(self.canvas)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    m = Main()
    m.show()
    app.exec_()

It may be relative to a mousemoveent, as it does not
crash until I move the mouse on the window.

Julien Pages

BTW: thanks to the really great matplotlib framework :slight_smile:

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