On 8/19/06, Darren Dale <[EMAIL PROTECTED]> wrote:
> On Friday 18 August 2006 08:27, Darren Dale wrote:
> > On Wednesday 16 August 2006 04:54, Samuel GARCIA wrote:
> > > Thank you,
> > > Sorry I did known the existence of matplotlib.backends.backend_qt4agg.
> > > It is more easy than I thought.
> > >
> > > but I still have a problem. This is my code :
> > >
> > > import sys
> > >
> > > from PyQt4.QtCore import *
> > > from PyQt4.QtGui import *
> > >
> > > from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as
> > > FigureCanvas
> > > from matplotlib.figure import Figure
> > >
> > > #------------------------------------------------------------------------
> > >-- ---- class MyWidget(QWidget):
> > > def __init__(self, parent=None):
> > > QWidget.__init__(self, parent)
> > > self.menuBar = QMenuBar()
> > > self.fileMenu = QMenu(self.tr("&File"), self)
> > > self.menuBar.addMenu(self.fileMenu)
> > >
> > > mainLayout = QVBoxLayout()
> > > mainLayout.setMenuBar(self.menuBar)
> > >
> > > self.setLayout(mainLayout)
> > >
> > > #------------------------------------------------------------------------
> > >-- ---- if __name__ == "__main__":
> > > app = QApplication(sys.argv)
> > > dialog = MyWidget()
> > > dialog.show()
> > > sys.exit(app.exec_())
> > >
> > > and it does not works because the main window is blocking.
>
> There is a comment in the embedding_in_qt.py example:
>
> # The QApplication has to be created before backend_qt is imported, otherwise
> # it will create one itself.
>
> This goes for qt4 as well, and is the source of the problem. You can have only
> one QApplication at a time. (Ted, John, do you think the QApplication really
> needs to be created during the module import? show() is the only function
> that looks for the QApplication, maybe the qApp should be created there
> instead. Any reason against?)
>
> I added an example, embedding_in_qt4.py, to the svn repository. It is closely
> based on embedding_in_qt.py.
>From what I saw, creating QApp in show makes more sense.
- Charlie
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