signal set from button on click, but not touch

[igor_stravinsky]

Qt Quick Controls 2 5.11

I've got a button that should send a signal to a parent view when clicked. Everything works as it should when clicked with a mouse, but when I tap the button on a touch screen (a Windows 10 surface) I can see that the onClicked() code is executed, but the slot for the signal never responds.

Any idea why clicks would behave one way, but taps wouldn't?

Drawer{
  id: myDrawer
}

Rectangle {
    id: root
    signal: mySignal()

    onMySignal:{
           myDrawer.open()
        }

     Item{
       Item{
         Button{
              id:myButton
              property int tapCount: 0;
             onClicked: {
                    root.mySignal()
                    tapCount++;
                    myButton.text = tapCount;
                }
       }
      }
    }
}

[igor_stravinsky]

Further testing shows that the signal is getting received by the onMySignal() handler, but that the call inside that handler to open a drawer isn't being called.

I also can't change the opacity of an object outside the root rectangle hierarchy, so it's as if there's a scoping issue, and that from inside onMySignal(), I can't reference objects outside, but only when the button is touched.

[dheerendra]

Try providing the height and width for Drawer.

[igor_stravinsky]

@dheerendra
I was trying to simplify the code. In reality myDrawer is a separate class that derives from a Drawer, and starts off like this:

Drawer {
    id:root
    height:parent.height
    width:450
    dragMargin:0
    edge:Qt.RightEdge
    }

And, as I mentioned, the drawer opens when the button is clicked on with a mouse, but not when tapped with a finger.