On Mon, 2015-03-30 at 13:22 +0100, Emmanuele Bassi wrote: > * use the event history for the devices you're interested in > * disable motion event compression on the GdkWindow that you're using > to detect events, and build up the positions you will then draw > > Other painting applications opted for the latter solution, so you > should likely explore it first; see the API reference:
For my Gentoo Linux box with gtk+-3.14.9 disabling motion event compression seems to have no effect currently. I just took the example program gtk+-3.15.8/examples/drawing.c and added the two inner lines gtk_widget_show_all (window); gdk_window = gtk_widget_get_window(GTK_WIDGET(window)); gdk_window_set_event_compression(gdk_window, FALSE); gtk_main (); (I think I have to put it after show all, to ensure that gtk window is realized and gdk window exists.) Makes no difference for me -- when I move the mouse pointer fast, I get separated points but no continuous line. I did a similar tests earlier, hoped that it would work now with GTK 3.14. I just tested with gimp -- with that tool free hand drawing gives continuous lines instead of separated points. So my mouse or other input hardware, and X event handling seems to be not the problem. There must be still some event filtering of GTK3 involved. Later I may test using event history... _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
