Can't catch hotkey in my own widget with Maya and Qt

Coding
#1

Hello,

I wrote a mll plugin for maya and use qt in it (I use maya 2011 x64 on windows and Qt opensource 4.5.3, build with vs2008).

There’s a QMainFrame in my plugin and some actions with shortcut added to the widget.

When I run it in maya, I can’t use any hotkey to invoke the my actions. For example, I set the Ctrl+n to my own “new file” action, but after I pressed Ctrl+n in maya (I focused on my widget), it just made a new maya scene, not my “new file” action. Then I tried to change the hotkey which isn’t existing in maya, like Ctrl+e, but failed also.

But I start my widget in standalone QApplication, I can use all my hotkeys!

So I can’t catch the hotkey in maya any more.

How to fix it?
Thx!

#2

I have no idea in Maya, but in Max, you needed to disable key acceleration. Look over the API for some way to disable hotkeys.

#3

doing a setFocusPolicy(Qt::StrongFocus) on the widget might help

#4

I too am currently struggling with this issue. Looking at the setFocusPolicy as suggested doesn’t solve it. I suspect it has something to do with Maya hijacking the shortcut signals. Afterall, Maya’s UI is now using the same Qt shortcut system.

I am going to try the QKeyEvent directly and see how that goes…

#5

You will probably have to install an eventFilter on the qApp to catch them, Maya is weird about event handling versus the way Qt works by default.

#6

As I suspected, you have reimplement the keyPressEvent for each widget you want to specify hotkeys for.

[pseudocode]

class Window():
   def __init__():
      # this assumes using uic to load a ui file
      # that has centralwidget as the main window
      # and tableview as a child

       self.centralwidget.setFocusPolicy(qt.StrongFocus)
       self.centralwidget.keyPressEvent = self.mainWindowKeyEvent
       self.tableview.keyPressEvent = self.tableKeyEvent

    def mainWindowKeyEvent(self, event):
        pass
        # this just accepts all keystrokes and does nothing with them
        # so that they don't get propagated on to Maya's hotkeys

    def tableKeyEvent(self, event):
        if event.key() == Qt.[keystroke]:
            [do something interesting]
            event.accept()  # make sure the event stops here

        else:
             # make sure any usual tableview hotkeys still get dealt with
             QtGui.QTableView.keyPressEvent(self.tableview, event)