[Qt-qml] MouseArea does not emit onPressed after being cancelled? II

[Bo Elmgreen]

Hi all,

I have now made a small test application, where the problem can be 
reproduced, please see the attached file. It can be run in the QML Viewer.

If you press the blue "button" and wait 5 seconds, a new "window" is 
shown and in the console log you can see that the button has been 
"cancelled". Now press "Acknowledge" to dismiss the new window and then 
the blue button is not working any more; no signals are sent when you 
press and release it. It is first after the new window has been 
displayed and removed again, that the button starts working again.

I found out that the pre-requisite for the problem to occur is, that the 
rectangle, where the button is located, is disabled (i.e. its "enabled" 
property is set to false) when the new window is displayed.

To me it seems like a bug? Or can I get around this?

Thanks,
Bo

-------- Original Message --------
Subject: 	MouseArea does not emit onPressed after being cancelled?
Date: 	Tue, 18 Oct 2011 16:14:30 +0200
From: 	Bo Elmgreen <bo.elmgreen at gmail.com>
To: 	qt-qml at qt.nokia.com



Hi all,

I have run into a problem, that I could need some help with :o)

I am using an Image element for a button, see snippet below. I have 
added a MouseArea and its onPressed and onReleased signals control 
whether the user is "talking". Normally this works fine, but if some 
event occurs, while the user is pressing the "button", so another 
element is shown and "steals" the mouse events, onCanceled is emitted 
from the MouseArea, but thereafter I cannot detect any presses on the 
image - after the intruding element has been removed. I am pressing the 
image, but no onPressed signal is emitted?

Am I doing something wrong or have I discovered a bug?

Thanks in advance!

Cheers,
Bo

Image{

         id:  pttButton

         source:  "images/PTT_button.png"

         opacity:  0.4

         anchors  {

             horizontalCenter:  parent.horizontalCenter

             bottom:  parent.bottom

             bottomMargin:  15

         }

         enabled:  false

         visible:  pttButtonShown

         MouseArea  {

             id:  pttButtonMouseArea

             anchors.fill:  parent

             onPressed:  {  console.log("pttButtonMouseArea  -  onPressed");  thisView.callButtonPressed();  contactSelector.closeCallsList()  }

             onReleased:  {  console.log("pttButtonMouseArea  -  onReleased");  thisView.callButtonReleased()  }

             onCanceled:  console.log("pttButtonMouseArea  -  onCanceled")

         }

         states:  [

             State  {

                 name:  "stateCallActive"

                 when:  callManager.haveCurrentCall  &&  !pttButtonMouseArea.pressed

                 PropertyChanges  {  target:  pttButton;  opacity:  1.0  }

                 PropertyChanges  {  target:  pttButton;  enabled:  true  }

             },

             State  {

                 name:  "stateCallActivePressed"

                 when:  callManager.haveCurrentCall  &&  pttButtonMouseArea.pressed

                 PropertyChanges  {  target:  pttButton;  opacity:  0.7  }

                 PropertyChanges  {  target:  pttButton;  enabled:  true  }

             }

         ]

     }



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