Re: GTK+ PopUp Window make it Transparent...

[Wolfman <murat sari team-bytestorm com>]

Good to know :)
1.Do u know how to get the HWND(is there a way to get the HWND from
HGDIOBJ?)

Its looks quit easy under win32:

// Set WS_EX_LAYERED on this window 
SetWindowLong(hwnd, GWL_EXSTYLE,
        GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_LAYERED);
// Make this window 70% alpha
SetLayeredWindowAttributes(hwnd, 0, (255 * 70) / 100, LWA_ALPHA);

The problem is how to get this mechanism to GTK+ or better to cairo?

Target function: cairo_set_source_rgba
Is it possible to get the hwnd from cairo_t struct?
Any advise will be helpfull cause i dont know where to start.

regards.

Tor Lillqvist wrote:
> Wolfman writes:
>  > Is there a other way to make a window transparent? And why this
>  > doesnt work under WinXP?
>
> Windows with alpha aren't implemented in gdk/win32. Patches
> welcome. Look for "layered windows" in MSDN.
>
> --tml
>
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