Background image for main window widget using css.

[Enygma]

Hi. I`m having a problem with setting the background-image css attribute for my main window wich is a subclasses Widget built with the designer.

The main issue is that I use a MultiPageWidget and when I try to apply a background-image to the main window containing the multipagewidget, nothing happens.

If, on the other hand, I apply a background-color to the main window, it works.

Any help would be very much appreciated. :confused:

Thank you.

[jpn]

Exactly how do you set these background images and colors? Do you embed the background image as a resource or could it be a problem with relative paths? And what is a MultiPageWidget?

[Enygma]

Ok, so I have the background image in a resource file.

I have a widget as main window and on top of that, a MultiPageWidget. ( all built with the designer ).

Now, using a stylesheet I haven't managed to set the window ( widget ) background so that the surrounding multipagewidget`s area ( the visible place belonging to the main window widget that is behind ) would have the specified background-image.

After trying all the possibilities, I found a workaround... actually not a workaround... just something to make it work :P and it involves the following code, and not css ( what I wanted ).



QPixmap bg(":/images/background.png");
QPalette p(palette());
p.setBrush(QPalette::Background, bg);
setAutoFillBackground(true);
setPalette(p);


This is quite a standard way of setting an image for background, but I wanted the clean css way, not the coded way...

p.s.: This way It had a nice side-effect by displaying the background image trough the other controls like QGroupBox and QLabel that were contained in the MultiPageWidget. I expected them being opaque instead of transparent, but that will do.

The CSS I used in trying to set the background image was simple:


MainWindow {
background-image: url(:/images/background.png);
}


If I use a background-color: red; for example... I get the desired effect, only with a color, not an image.

Hope I was explicit enough.

Any ideeas?

[jpn]

Does the class declaration of MainWindow contain Q_OBJECT macro? Could you paste the .qrc file?

[Enygma]

class MainWindow : public QWidget, private Ui::MainWindowUi{
Q_OBJECT


<RCC>
<qresource>
...
<file>images/background.png</file>
...
</qresource>
</RCC>

I already said it worked using the pixmap so that means that the resource is ok.

:confused:

[jpn]

I think you might have run into this problem:
http://trolltech.com/developer/task-tracker/index_html?method=entry&id=166742

[Enygma]

2007-06-12 17:48 - Entry created: Task status changed to 'Open', Resolution set to 'Pending', Version found set to '4.3.0', Version for fix set to '4.3.1', Priority changed to '1 - Highest'
2007-06-13 17:17 - Task status changed to 'Active'
2007-06-14 15:11 - Resolution set to 'Fixed'
2007-06-14 15:11 - Task status changed to 'Closed'


I use Qt 4.3.1. No fix.

[jpn]

Could you try what happens if you provide such paintEvent() as suggested in the "resolution"? I'm looking at qwidget.cpp of Qt 4.3.1 and see and empty paintEvent().

[Enygma]

Tried it and worked.

Thumbs up! :D