[PyQt] Icons and Qt resources

[Nahuel Defossé]

El Friday 16 January 2009 06:43:46 Frédéric escribió:
> Hi,
>
> My dialogs used some icons for buttons (move left, move right...), and
> some of these buttons icons need to be changed dynamically according to
> the current sequence.
>
They are very easy to use. Just create a qrc file, which is basically 
something like this:
<!DOCTYPE RCC><RCC version="1.0">
<qresource prefix="/">
        <file>coolicons/cubic.svg</file>
</qresource>
<qresource prefix="/small">
        <file>smallicons/cubic.png</file>
</qresource>
</RCC>

Once you've compiled the module with pyrcc4, then import the module somewhere 
in your code.
Then use them like this
my_image = QPixmap(":/coolicons/cubic.svg") # Or :/small/smallicons/cubic.png
my_button_dialog.setPixmap( my_image )

Take into account that you should use : <PREFIX> / <PATH>.

Qrc files can be created and used by designer, which is very handy, but you 
can create your own.

I tend to write a Makefile to compile my qrc into python modules and also 
execute pyuic on my .ui files.

SVG is nice, but if you product target is windows, I'd stick to PNG. I've had 
some issues, specially setting top level window icons with SVG, and sometimes 
Inkscape generated svg files throw some debug info (like gradients not 
understood) when Qt loads them.

Nahuel