Re: How to capture mouse movements independend of a Window?

[tomas tuxteam de]

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On Wed, Jan 03, 2007 at 12:18:17PM +0100, ferri_marllo gva es wrote:
> Hello!!

hello!

(please, keep the list CC'ed so that others may lurk/chime-in)

> I'm new in this treatment, but your help is good for me.

Glad it is :)

> I compile your code in a good way, but i want to add a cursor, just being inside
> the window(like the code), but with the option of deleting it,just ,leaving the
> window.

So you just want to hide the cursor? What you do is to create an
invisible pixmap. Instead of:

      GdkCursor *cursor = gdk_cursor_new(GDK_PIRATE);

you can do (Warning: untested code):

      GdkCursor *cursor = gdk_cursor_new_from_pixmap(NULL, /* pixmap */
                                                     NULL, /* mask */
                                                     NULL, /* foreground */
                                                     NULL, /* background */
                                                     0,    /* xoff */
                                                     0);   /* yoff */

> In your code, i can't left main window..
> please, can you help me??

This is supposed to work this way. That's why I warned that "this is a
trap" :-) For a real application, you'd have to make another event
function which releases the grab.

I did it for two reasons: (1) simplicity (I didn't want to complicate the
sample program with irrelevant stuff) (2) to convey that pointer grabs
in X are a sharp tool: use them sparingly or your users will curse at
you (and for very good reasons).

I seem to remember that it was late Netscape 4.x which used to
half-crash, closing all the windows and keeping the grab. Boy, that was
obnoxious.

> thanks a lot

You are welcome
- -- tomÃs
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