I think this may be Python cleaning up :)
Once your GUIs start getting more complex, you have to use the global
application
instantiation and global windows variables.
If you don't use both the global application instantiation and global
windows variables,
then the resultant GUI will appear and disappear very quickly as Python
cleans up its
local variables.
import sys
import PyQt4 as qt
app=None
win=None
def windo():
global app
global win
app = qt.QApplication(sys.argv)
win = qt.QLabel("Hello world!",None)
win.show()
windo()
On Tue, Jun 16, 2009 at 3:52 PM, Pierre A
<[email protected]>wrote:
>
> Hi,
>
> I'm experiencing a strange behavior with modal dialogs.
> Let's see the following code snippet: (Im in a method's class context)
>
> def launchDialog(self):
> diag = QtGui.QDialog(self)
> ret = diag.exec_()
> print ret
>
> I can see the dialog during a few miliseconds, then it disapears. The
> return value is always 0
>
> Now, another piece of code:
> def launchDialog(self):
> self.diag = QtGui.QDialog(self)
> ret = self.diag.exec_()
> print ret
>
> I'm just adding the dialog as a member of the class. The dialog
> becomes modal, but exec_() returns immediately.
>
> I have the same problems with the convenience methods of
> QtGui.QMessageBox and QtGui.QInputDialog, they are closed immediately
> too...
>
>
> I'm in a particular state in maya. I have two different GUI launched.
> They both use pumpthread:
> ## LAUNCH APP
> window = None
> app = None
> def LaunchApp():
> global app
> global window
> pt.initializePumpThread()
> app = QtGui.QApplication(sys.argv)
> window = MyWindowClass()
> window.show()
>
> If only one GUI is launched, diag.exec_() doesn't disappear. :'( But I
> really need to have multiple windows
> I'm stuck! I don't know how to solve this. Perhaps I could instanciate
> the QtApp in another module which would act as a singleton and share
> the QApplication with the different GUI?
>
> Thanks!
>
> Pierre
>
>
> >
>
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http://groups.google.com/group/python_inside_maya
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