[Qt-interest] Set Background From Image File

[Atlant Schmidt]

Zen:

  While you're at it, if performance matters to you, it's fairly important
  that the images you use for backgrounds match the "native size" of
  the image area within the controls. Otherwise, Qt may spend a lot
  of effort scaling the image to match the sizes.

  You may also want to read how "9 slicing" works for expanding/
  shrinking images while preserving the shapes of their corners/
  edges.

                                              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 Szalata, Zenon M.
Sent: Wednesday, August 24, 2011 20:32
To: qt-interest at trolltech.com
Subject: [Qt-interest] Set Background From Image File

I have followed an example in:

http://www.developer.nokia.com/Community/Wiki/Load,_Resize_image_and_set_background_image_in_Qt_application/widget
and I got my test program to work with either main window or a scroll area in the main window.  I could not get it to work with either QFrame or QWidget.  I have created a main window and the a child widget (either QScrollArea, QFrame, or QWidget) in QT designer.  Then I have coded my mainwindow.cpp as in the example.
I thought that this procedure should have worked with the frame widget, but it did not.  Why?

Next I wanted to do this in the style sheet file.   So I created myStyle.qss  where I have a number of rules including this one:
QScrollArea{
    background-image: url(:/nlctaSketch.png);
}

All other rules work but the one for the scroll area does not.  Am I doing it wrong?
I have commented out the code in my mainwindow.cpp file for setting the background.

Thanks for any hints,
Zen



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