Send KeyEvent from QWidget to QML element

apap_

Hello,

I have two windows : one QQuickView and one QGLWidget. The process of key events are made in the root item of the main window QQuickView, so it is made in qml with a javascript function (handler Keys.onPressed).

So now I also want to catch keyevents in QGLWidget, it works well with "keyPressEvent(QKeyEvent* event)", and I want to forward it to my root item in QQuickView.
Here is my code :
@
void MyGLWindow::keyPressEvent(QKeyEvent* event)
{
QKeyEvent* eventCopy = new QKeyEvent(event->type(), event->key(), event->modifiers());
QApplication::postEvent(quickView->rootObject(), eventCopy);
}
@

It does not work, does anyone understand why ?

p3c0

Hi,

Did you get any errors ? Can you show the QML code ?

apap_

No errors.
I am working on Mac 10.8 with QT 5.2.1.

QML code:

@
FocusScope {
id: root

width: 800
height: 600
focus: true

Keys.onPressed: {
    console.log("Keys pressed QML");

    if (event.key === Qt.Key_Escape)
    {
          // ...
    }
}

@

My trace is never printed when I press from QLWidget.

t3685

You might be sending the event to the wrong object. Try sending it to the QQuickView object of your QML application.

apap_

Same thing with QQuickView object.
I also traced pointers and I am sending to the right object, look :
@
root qml=QQuickFocusScope_QML_95(0x7f7f696ac810)

quickView->rootObject()= QQuickFocusScope_QML_95 (this = 0x7f7f696ac810 , name= "" , parent = 0x7f7f69476c00 , geometry = QRectF(0,0 800x600) , z = 0 )

quickView= QQuickView(0x7f7f6947beb0)

@

t3685

Try sending it to @static_cast<QObject*>(QGuiApplication::focusWindow())@
just to make sure that your sending is working.

apap_

I tried your code t3685 and I loop on my function MyGLWindow::keyPressEvent.
So my sending is working.

p3c0

Have you made sure the keyPressEvent() is called ?

Gianluca

I was stucked on the same problem and I found a workaround.
If you are still trying to solve the problem let me know and I'll tell you what was my workaround.

sraboisson

@Gianluca
Hi Gianluca, i'm facing the same problem, could you please give us your workaroud please ?
Thank you.