| RE : [platform-swt-dev] Loading PNG file with alpha channel |
Hello everyone,
A Label object does not [yet, I guess] support alpha channel transparency just by throwing a PNG image at it. But a GC (Graphical context) does.
Gc is accessible through paint event so you can do sth like this :
final Image splash = new Image( display , testSplash.class.getResourceAsStream( "Lax_splash.png" ) ) ;
Shell shell = new Shell( display , SWT.NO_TRIM | SWT.NO_BACKGROUND ) ;
// ... layout..
shell.addPaintListener( new PaintListener() {
public void paintControl (PaintEvent e) {
e.gc.drawImage( splash , 0 , 0 ) ; } } ) ;
You can generalise this for buttons and hover labels acting as labels...
Hope this helps.
A.
-----Message d'origine-----
De : Mohsen Saboorian [mailto:mohsen_s@xxxxxxxxxxxxx]
Envoyé : 31 August 2004 19:00
À : platform-swt-dev@xxxxxxxxxxx
Objet : [platform-swt-dev] Loading PNG file with alpha channel
Hi,
I have a 32 bit png file (sure with alpha channel properties).
Now when I try to open it as a form icon (using shell.setImage(...),
the result is not as the image should be. It seems to be 256color
or may alpha channel values are ignored.
As far as I know the only image format with alpha channel enabled is png,
so it seems that there is no alternative way.
Thanks in advance.
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