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Qt-interest Archive, May 2008
Strange colours

• Subject: Strange colours
• From: koan <emptystate@xxxxxxxxxxx>
• Date: Sun, 25 May 2008 19:47:27 +0900
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Hello,

In the constructor of my widget I set a window icon (code follows below).
When shown in the QMessageBox::about() the icon colours are changed
(Red->blue, blue->cyan, etc). This is in Linux; the application icon (in
the window title bar and panel) appears in the correct colours.

I checked the original image files have not become corrupted. I tried to
disable some of the resolutions; the only different behaviour was that when
using only size 16x16 the about box icon was fine and the application icon
had inverted colours.

I had no problem with QT 4.3, this is since setting up QT 4.4.

Have I missed something ? Thanks.

Code as follows:

  QPixmap icon128(shine128);
  QPixmap icon128a(shine128a);
  icon128.setAlphaChannel(icon128a);
  QPixmap icon64(shine64);
  QPixmap icon64a(shine64a);
  icon64.setAlphaChannel(icon64a);
  QPixmap icon32(shine32);
  QPixmap icon32a(shine32a);
  icon32.setAlphaChannel(icon32a);
  QPixmap icon16(shine16);
  QPixmap icon16a(shine16a);
  icon16.setAlphaChannel(icon16a);

  QIcon appicon(icon128);
  appicon.addPixmap(icon64);
  appicon.addPixmap(icon32);
  appicon.addPixmap(icon16);

  setWindowIcon(appicon);

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