How to get a unique WindowRef in a dockable Qt application on Mac
- by Robin
How do I get a unique WindowRef from a Qt application that includes docked windows on the Mac?
My code boils down to:
int main(int argc, char* argv[])
{
QApplication* qtApp = new QApplication(argc, argv);
MyQMainWindow mainwin;
mainwin.show();
}
class MyQMainWindow : public QMainWindow
{
//...
QDockWidget* mDock;
MyQWidget* mDrawArea;
QStackedWidget* mCentralStack;
};
MyQMainWindow::MyQMainWindow()
{
mDock = new QDockWidget(tr("Docked Widget"), this);
mDock->setMaximumWidth(180);
//...
addDockWidget(Qt::RightDockWidgetArea, mDock);
mDrawArea = new MyQWidget(this);
mCentralStack = new QStackedWidget();
mCentralStack->addWidget(mDrawArea);
// Other widgets added to stack in production code.
setCentralWidget(mCentralStack);
//...
}
(Apologies if the above isn't syntactically correct, it's just easier to illustrate than to describe.)
I added the following temporary code at the end of the above constructor:
HIViewRef view1 = (HIViewRef) mDrawArea->winId();
HIViewRef view2 = (HIViewRef) mDock->winId();
WindowRef win1 = HIViewGetWindow(view1);
WindowRef win2 = HIViewGetWindow(view2);
My problem is that view1 and view2 are different, but win1 and win2 are the same!
I tried the following equivalent on Windows:
HWND win1 = (HWND)(mCentralDrawArea->winId());
HWND win2 = (HWND)(mDock1->winId());
This time win1 and win2 are different.
I need the window handle to pass on to a 3rd party SDK so that it can draw into the central area only.
BTW, I appreciate that the winId() method comes with lots of portability warnings, but a substantial refactor is out of the question for me. The same goes for using Carbon instead of Cocoa.
Thanks.
