Hi Forum,

I wonder if there is a possibility to fake a fast application startup at Qt4.6 like the possibility we have for GTK+ applications.

At GTK we could use this function to create a screenshot that is shown automatically at the next startup before the Application is loaded:

But, as the function name said, it works only for GTK Applications.
Is there something similar for Qt4.6 and the Maemo target?

Google was so far not my friend...

Have a look at QPixmap::grabWindow
http://doc.qt.nokia.com/latest/qpixmap.html#grabWindow

I don't know if there's any Qt-specific method for this, but look at the function itself: http://maemo.gitorious.org/hildon/hi...-gtk.c#line478

Notice that the bits which actually request for the screenshot to be taken are calls to the X library - they're not GTK+ specific!

You could replace GDK_WINDOW_XID with QWidget::winId() and look through QWidget::x11Info's display member to replace gtk_widget_get_display (as a start)

But maybe there is a Qt method for this and I'm going OTT

Ooookay.
I played a little bit with it. I'm able to store the screen into a image file, but the rest... mmh, I gave up for the moment... I'm new to C++ and Qt, doing some testing for my first real application. My last project I used python without the knowledge what I'm really doing there. But thanks for the hint. I would say I will look into it later again. It's good to know.

http://doc.trolltech.com/latest/desktop-screenshot.html

Thanks timoph and sakya, but creating a screenshot and storing it to a file is not my problem.

My problem is that Hildon doesn't automatically use this image as loading screen for the next application startup.

It was discussed nearly 2 years ago here: maemo-developers-Mailinglist

But it's all GTK related and I'm unable to find someting similar for Qt. (except to write it myself like jstokes has suggested.)