partial area has white background on 5800XM

[griffin27]

Hi,

i'm working on an application, which only supports the portrait mode.
all works fine, when i start it out of the portrait mode.

but when the system is in the landscape mode, and i start the app then the bottom part of the full screen window has a withe background color instead of black.

Started out of portrait mode:

everything is fine.

But started out of landscape mode:

I had to use a photo camera to make a screenshot because ScreenSnap doesn't show this effect in the screenshots...

now i did a workaround by redefining the applications QPalette

MainWindow::MainWindow()
{
	...
#ifdef Q_OS_SYMBIAN

	// Workaround to Bug#02:
	// overrides the system color sheme!!! (TODO: find another solution)
	QPalette pal;
	pal.setColor(QPalette::Window, Qt::black);
	pal.setColor(QPalette::WindowText, Qt::white);
	QApplication::setPalette(pal);

	showFullScreen();
	...
#else

the main function has this code to lock to portrait mode:

#include <QApplication>
#include "mainwindow.h"

// found this code for screen-orientation on:
// http://thpmaemo.blogspot.com/2010/10/qt-write-once-ifdef-everywhere.html
// added this code on 26th of Oct. 2010
#ifdef Q_OS_SYMBIAN
#include <AknAppUi.h>
#endif

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

#ifdef Q_OS_SYMBIAN
	CAknAppUi* appUi = dynamic_cast<CAknAppUi*> (CEikonEnv::Static()->AppUi());
	TRAPD(error,
	if (appUi) {
		appUi->SetOrientationL(CAknAppUi::EAppUiOrientationPortrait);
	}
	);
#endif

	MainWindow window;
	//window.show();
    return app.exec();
}

my workaround is fine, but it overrides the systems default color sheme. and that's not a nice way!
has anybody had this bug or a better idea for a workaround?

kind regards,
Karl Zeilhofer

[Sorcery-ltd]

Are you drawing part of your UI transparent with bits of the system background showing through?

Any particular good reason for doing so, particularly at the bottom there?

Is it a graphics view based app? If so the border around the edge is because the graphics view has a transparent frame by default with the S60 style, you can set the frame style to NoFrame to fix that part (and you get more area to draw on!).

[griffin27]

please note, that this issue is dependent of the orientation BEFORE starting the application.
If the orientation was already in portrait mode, it behaves like expected.

i don't set anything of the ui to transperent. and also it is not the system, that is shining throug, it's just white!
The app is not graphics view bases. it's a simple widget.

[Sorcery-ltd]

Yes, I think it's transparency in the default palette on Symbian. Basically the system background should show through in some circumstances but when the orientation was different beforehand the cached system background has the wrong orientation or something like that.

The workaround you've got is probably the best one for now. It's a bug in Qt in any case, you should raise it in their JIRA instance.

If you want you could experiment with setting the WA_OpaquePaintEvent & WA_NoSystemBackground attributes on your widgets. You might get more white.

It almost certainly doesn't have to be Graphics View based for the other issue I mentioned - any class that inherits from QFrame probably gets that transparent border I guess.

[griffin27]

thank you for your answer!
I posted this bug to
http://bugreports.qt.nokia.com/browse/QTBUG-17311

do you have any idea about my second problem?
http://discussion.forum.nokia.com/fo...oes-not-update
i really don't find any solution

thanks in advance