kees ha scritto lo scorso 25/02/2005 12:45:
Can anyone explain to me why the very small program beneath, demonstrating
a very basic form of rubberbanding, works excellent while compiled
with GTK1* but does not work correctly when compiled with GTK2*.
[..]
gint drawareacb(GtkWidget *widget, GdkEventButton *event, gpointer data)
{
gint x0, y0;
gint x[2], y[2];
if(ii == 0)
{
cleararea(drawing_area);
ii=1;
}
gdk_window_get_pointer(drawing_area->window, &x0, &y0, NULL);
switch(event->type)
{
case GDK_BUTTON_PRESS:
x[0]=x0;
y[0]=y0;
gdk_draw_line(drawing_area->window, gc, 200, 400, x0, y0);
break;
case GDK_MOTION_NOTIFY:
x[1]=x0;
y[1]=y0;
gdk_draw_line(drawing_area->window, gc, 200, 400, x[0], y[0]);
^^^^^^^^^^
gdb gives:
x[0] = 1048
y[0] = -1073751042
gdk_draw_line(drawing_area->window, gc, 200, 400, x[1], y[1]);
x[0]=x[1];
y[0]=y[1];
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