On Tue, 2014-09-02 at 11:01 +1000, Lex Trotman wrote: > As stated before, motion events are only *delivered* per frame, all > the compress flag does is set it to deliver the motion as one event > per frame or multiple events per frame. If you have compress true (as > above) only one event is delivered, on each frame time, so thats the > time you see. You only get the position at the end of the frame. > > If you turn compress off you will get all the events generated during > the last frame cycle. That allows applications to trace the positions > that the cursor moved through. Yes, I understand this, but unfortunately I see no effect. My current idea was that it may work not for the main window, but it may work for a drawing area. So I changed the C code as below, and appended an output snippet. As you see, time interval is generally about 12 ms. Maybe the limitation is my computer, it is some years old now, or maybe the mouse device, it is from Logitech. When I have some time again I may check on another computer... //gcc -Wall -o t t.c `pkg-config --libs --cflags gtk+-3.0` #include <gtk/gtk.h> void print_event(GtkWidget *widget, GdkEventMotion *event, gpointer p) { printf("%.0f, %.0f: %d\n", event->x, event->y, event->time); } int main( int argc, char *argv[]) { GtkWidget *window; GtkWidget *darea; GdkWindow *gdkwin; gtk_init(&argc, &argv); window = gtk_window_new(GTK_WINDOW_TOPLEVEL); darea = gtk_drawing_area_new(); gtk_widget_set_size_request(darea, 800, 1200); gtk_window_set_default_size(GTK_WINDOW(window), 800, 800); gtk_container_add(GTK_CONTAINER(window), darea); gtk_widget_set_events(darea, GDK_POINTER_MOTION_MASK); gtk_widget_show_all(window); g_signal_connect(darea, "motion_notify_event", G_CALLBACK (print_event), NULL); g_signal_connect_swapped(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL); gdkwin = gtk_widget_get_window(darea); gdk_window_set_event_compression(gdkwin, FALSE); //gdk_window_set_event_compression(gdkwin, TRUE); gtk_main(); return 0; } stefan@AMD64X2 ~/rth $ ./t 7, 625: 2029540 48, 625: 2029552 89, 623: 2029564 132, 623: 2029576 177, 623: 2029588 222, 621: 2029604 267, 621: 2029616 312, 621: 2029628 357, 621: 2029640 398, 621: 2029652 435, 621: 2029664 476, 621: 2029676 501, 621: 2029688 534, 621: 2029704 563, 619: 2029716 590, 619: 2029728 613, 619: 2029740 636, 617: 2029752 657, 617: 2029764 682, 617: 2029776 701, 619: 2029788 722, 621: 2029804 745, 624: 2029816 770, 622: 2029828 793, 625: 2029840 _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gtk-list