Key Press Event trouble

Does any one know how to setup Key press event handeling?

i can make head nor tail of the online docs on this issue and i just want to setup the escape button to trigger a function when pressed viewing the main window.

do i have to add a method to the object of the mainwindow class to catch it or something?

i just can see any examples on this at all (or any that make sense)


your help on this would be much appreciated

You can subclass the window and override the keyPressEvent.
Or you can install filter on window to get its event...
QWidget::keyPressEvent
QObject::installEventFilter

sorry but i looked at the docs and i cant make sense of it have yo please got a sample code to subclass the QMainWindow and add a keyPressEvent to it for QT:Key_Escape key
ive tried every thing but i cant get it to work

Thank you

can we see wat u tried ? it shudne be a long code

im doing this in python PTQT i have this code for the filter which is both an activity filter to reset a inactivity timer and a filter to react to the Escape key but its not working.

Code:

---

class activityFilter(QObject):
 
    def __init__(self, parent=None):
        super(activityFilter, self).__init__(parent)
        self.eventaction = turnOffApp()
        self.eventexit = MainDisplay()
 
    def eventFilter(self, obj, event):
        if event.type() == QEvent.KeyPress and event.key() == Qt.Key_Escape:
            self.eventexit.lockNow()
        else:
            self.eventaction.reset()
        return QObject.eventFilter(self, obj, event)

---

Then at the bottom of the page i call the main Window an put this filter on it

Code:

---

def main():
    app = QApplication(sys.argv)
    app.setOrganizationName("random.")
    app.setOrganizationDomain("random")
    app.setApplicationName("random")
    app.setWindowIcon(QIcon(":/icon.png"))
 
 
    filename = os.path.join(os.path.dirname(os.path.dirname(__file__)), "dataCache.db")
    create = not QFile.exists(filename)
 
    db = QSqlDatabase.addDatabase("QSQLITE")
    db.setDatabaseName(filename)
    if not db.open():
        QMessageBox.warning(None, "Store Application",
            QString("Database Error: %1").arg(db.lastError().text()))
        sys.exit(1)
    if create:
        createDatabaseData()
 
    app.processEvents()
    form = MainWindow()
    ef = activityFilter()  
    form.installEventFilter(ef)
    form.show()
    app.exec_()
 
 
main()

---

the filter calls to other class functions which are definitely working the problem lies in the filter

this this...

8. def eventFilter(self, obj, event):

to

def keyPressEvent(self, event):


http://www.zetcode.com/tutorials/pyq...ntsandsignals/

section "Reimplementing event handler"

Thanks for getting back to me that look slike a good tutorial you have linked there. i will look at that today.

Cheers!