[Qt-interest] Events on Transparent Window

[Atlant Schmidt]

Sean:

  Set the window infinitesimally opaque?

                          Atlant

________________________________
From: qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com [mailto:qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com] On Behalf Of Sean Hayes
Sent: Wednesday, February 09, 2011 11:20
To: Qt Interest
Subject: [Qt-interest] Events on Transparent Window

I am trying to create a transparent window that overlays multiple other windows and captures all mouse and touch events. Windows touch messages seem to only be set to a window if the initial contact point is over the window. Therefore, if you start a gesture over one window and add a finger over another window, the QTouchEvent will only contain the first touch point. A setup similar to the one in this Windows programing article<http://blogs.msdn.com/b/seealso/archive/2011/02/07/creating-windows-touch-control-frameworks-photostrip.aspx> may solve this problem. However, I do not know much about windows specific code and would prefer to stick with Qt's API for obvious reasons.

Setting full transparency causes Windows to send the event directly to the window underneath, defeating the purpose. Any ideas on how to force the transparent window to receve events? I have tried this with QWidget::setWindowOpacity(0).

I am using Qt 4.7.1 on Windows 7.

Thanks for you help,
Sean


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