Sorry about the repost but I think that the PyQt mailing list swallowed
the text with my
question ...
According to the Qt4 docs, a QMenu is supposed to be capable of emitting a
`triggered' event which contains the action which was triggered. (I realize
that its a better coding practice to connect the `triggered' event
associated
with individual QActions to their own separate callbacks, but I'm porting an
application from Qt3 to Qt4 and I'd prefer not to have to write a whole
bunch,~50, of new callbacks.) So I'd like to get the more global QMenu
triggered event to work. Unfortunately, with PyQt, I can't seem to see or
catch the QMenu's triggered event. The following PyQt demo script
illustrates
the problem. Can someone point out what I'm doing wrong?
Thanks
Tony
###############################################
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class mepViewer(QDialog):
def __init__(self, parent=None):
super(mepViewer, self).__init__(parent)
self.setWindowTitle('QAction demo.py')
# The status bar gives status and progress.
# (do this one first, so we can send messages)
self._statusBar = QStatusBar()
self._statusBar.showMessage('This is the status bar')
# The menu-bar:
self._menuBar = QMenuBar()
self._menuBar.addMenu(self.make_file_menu())
# Make the overall vertical layout:
vlayout = QVBoxLayout()
vlayout.addWidget(self._menuBar)
self.setLayout(vlayout)
return None
def make_file_menu(self):
"""
Make the file menu on the main menubar.
"""
actiongroup = QActionGroup(self)
menu = QMenu('&File', self)
# the next line works
self.connect(menu, SIGNAL('aboutToShow()'), self.about_to_show)
# the following line doesn't seem to work
self.connect(menu, SIGNAL('triggered()'), self.was_triggered)
action = QAction('&New', self)
action.setToolTip('Open a new .mep file')
action_id = 1
action.setData(QVariant(action_id))
menu.addAction(action)
# the following works just fine
self.connect(action, SIGNAL('triggered()'),
self.new_mepTable_dialog)
# unfortunately the following doesn't seem to do anything
self.connect(menu, SIGNAL('triggered(action)'), self.was_triggered)
# nor does the following
self.connect(menu, SIGNAL('triggered(QAction)'), self.was_triggered)
# the following works, but doesn't seem to be terribly useful
# as the signal contains a negative integer
self.connect(menu, SIGNAL('activated(int)'), self.catch_int)
action = QAction('&Simulated', self)
action.setToolTip('Simulated .mep table')
menu.addAction(action)
self.connect(action, SIGNAL('triggered()'), self.read_mepfile)
action = QAction('&Exit', self)
action.setToolTip('Exit command')
menu.addAction(action)
self.connect(action, SIGNAL('triggered()'), self.do_exit)
return menu
#----------------------------------------------------------------
def was_triggered(self, action):
print 'caught triggered event'
def about_to_show(self):
print 'in about_to_show'
def new_mepTable_dialog(self):
print 'in new_mepTable'
def read_mepfile (self):
print 'in read_mepfile'
def do_exit (self):
print 'in do_exit'
def catch_int(self, value):
print 'in catch_int with value ', value
if __name__ == '__main__':
app = QApplication(sys.argv)
mv = mepViewer()
mv.show()
app.exec_()
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