<![CDATA[Qt Virtual Keyboard's strange transparency under Debian]]>Hello,

I'm testing the Qt Virtual keyboard 5.7.

After building and deployment, the keyboard works properly. The only problem is that the keyboard panel's background is transparent under my debian system(GNOME,KDE, ... tested with all the desktops). If the background before the keyboard pops up was dark, then we can see the keys on the dark background, but if the background was white, we can see nothing but the buttons are still there and can be operated.

0_1475043435541_1.png

I also tested it under ubuntu, no such problem occurs.

And all my other Qt 5.7 built applications have no such problem.

]]>https://forum.qt.io/topic/71667/qt-virtual-keyboard-s-strange-transparency-under-debianRSS for NodeWed, 22 Apr 2026 20:19:53 GMTTue, 27 Sep 2016 12:34:05 GMT60<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Tue, 04 Oct 2016 15:05:52 GMT]]>Thanks for the workaround and report !

]]>https://forum.qt.io/post/351840https://forum.qt.io/post/351840Tue, 04 Oct 2016 15:05:52 GMT<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Tue, 04 Oct 2016 08:54:54 GMT]]>@SGaist Thank you for your answer and I've found that I could avoid this problem by adding view.setcolor(QtColor(Qt::transparent)) to any application who wants to invoke the keyboard, that must be unormal, so I reported this as a bug.

More details are described there:
https://bugreports.qt.io/browse/QTBUG-56357

]]>https://forum.qt.io/post/351769https://forum.qt.io/post/351769Tue, 04 Oct 2016 08:54:54 GMT<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Thu, 29 Sep 2016 20:03:42 GMT]]>That I don't know and might be not relevant. Ubuntu is a Debian derivative but they implement their own replacement of the X server with Mir.

There are several window managers for Linux that behaves differently so you may have found something on the ones you are running.

]]>https://forum.qt.io/post/350930https://forum.qt.io/post/350930Thu, 29 Sep 2016 20:03:42 GMT<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Thu, 29 Sep 2016 12:25:53 GMT]]>I almost believe that this problem has something todo with the d->view->setcolor(QtColor(Qt::transparent)) statement in the source code. If I change that, it has different effects under windows, ubuntu and debian. Does some on also use debian to test the virtual keyboard?

]]>https://forum.qt.io/post/350802https://forum.qt.io/post/350802Thu, 29 Sep 2016 12:25:53 GMT<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Thu, 29 Sep 2016 06:31:07 GMT]]>@SGaist Hi, if you mean testing the keyboard with a simple example, yes I did that already. Using an example with only on text input field, and also tested with many different Qt5.7 applications with text edit Field, all the same. THe keyboard is transparent above white background.

]]>https://forum.qt.io/post/350718https://forum.qt.io/post/350718Thu, 29 Sep 2016 06:31:07 GMT<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Wed, 28 Sep 2016 19:53:03 GMT]]>Ok,

Can you reproduce that with a minimal compilable example ?

]]>https://forum.qt.io/post/350655https://forum.qt.io/post/350655Wed, 28 Sep 2016 19:53:03 GMT<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Wed, 28 Sep 2016 06:15:40 GMT]]>@SGaist Hello,

Thanks for replying. No, so far all my applications are nornal. And all the Qt examples I built myself are also normal. Only have the Qt keyboard problem

]]>https://forum.qt.io/post/350397https://forum.qt.io/post/350397Wed, 28 Sep 2016 06:15:40 GMT<![CDATA[Reply to Qt Virtual Keyboard's strange transparency under Debian on Tue, 27 Sep 2016 21:29:40 GMT]]>Hi and welcome to devnet,

Does it also happen if you build your application with your distribution provided Qt ?

]]>https://forum.qt.io/post/350340https://forum.qt.io/post/350340Tue, 27 Sep 2016 21:29:40 GMT