Re: [goocanvas] Motion event compression

[Damon Chaplin <damonachaplin gmail com>]

On Wed, 2018-03-14 at 14:39 +0100, Felix Weilbach t-online de wrote:
> I'm trying to deactivate motion compression on goocanvas, but it
> dosen't have any effect.
> I'm using goocanvas2.
>  
> The code to deactivate event compression:
>  
> gdk_win_canvas = gtk_widget_get_window(canvas);
> gdk_window_set_event_compression(gdk_win_canvas, FALSE);
>  
> At the end I include the code sample that I'm using. With the same
> sample with GtkDrawingArea instead of GooCanvas I get in 10 seconds
> 1400 motion events (drawing included and with a stylus). With
> goocanvas, I get just 600 motion events (drawing excluded and also
> with a stylus) in 10 seconds. If I turn on event compression in the
> sample with GtkDrawingArea, I get also 600 motion events in 10
> seconds, it seems to me that the call to gdk_set_event_compression()
> has no effect on GooCanvas.
> Can anyone tell me what I'm doing wrong?

The events normally come from the internal window the canvas uses, so
in theory this should work better:

gdk_window_set_event_compression(GOO_CANVAS (canvas)->canvas_window,
FALSE);

Unfortunately it seems to be worse for some reason. I'm not sure why.


Damon