TForm and transparency

[timppl]

Hello all

First of all, I am not sure if this is in the right section, so moderators feel free to move it.

My setup - lazarus svn 30995 with gtk2 on linux

In the application I am porting from Delphi, the splash screen is transparent so that the desktop can be seen through it, with a pattern set from a TImage. However, it does not seem that forms canot be set transparent with gtk2. I have looked through the forums and mailing lists and have seen to set AlphaBlend to True and AlphaBlendValue to 100.
I tried this and it did not make any difference. I have tried different values for AlphaBlendValues but non seem to make any difference.

In the dfm file, delphi has
  TransparentColor = True
  TransparentColorValue = clOlive
to set transparency ( like the trick for bitmaps, I assume ), but these do not appear to exist in lazarus/lcl.

Can anybody offer any definitive information on
1) If transparency works for forms in gtk2
2) How to do it

Thanks

Tim

[AmatCoder]

AlphaBlend works with gtk2, but you need a compositing window manager.

Regards.

[timppl]

Thanks, all is now clear . I am using plain metacity manager, so it will not work.

Regards

Tim