gEDA-dev: PCB-gtk rotate tool bug?

[Peter Clifton]

On Tue, 2007-09-18 at 14:51 -0400, David Carr wrote:
> Hey Guys,
> 
> Try this:
> Open PCB and add a component to the layout
> Rotate this component several times using the rotate tool (do a couple
> revolutions)
> 
> If I click a fairly rapid pace (say 2-3Hz) I find that about 50% of the
> time the component rotates 180 degrees instead of 90.  I usually run into
> this while spining something 270 --- the first click gives me 90, the
> second 180 and then the third skips 270 and goes right back to 0.
> 
> It seems to me that this is a long standing bug in the GTK HID or that I
> don't understand some small PCB feature (perhaps related to double
> clicks?).

> My suspicion is that this in an event bug of some kind where the click
> event is delivered or processed twice.


Without having read the code... this might be possible.

Gtk will send a single click event, followed by a second event for the double-click:

>From http://library.gnome.org/devel/gtk-faq/stable/x545.html

gint
signal_handler_event(GtkWidget *widget, GdkEventButton *event, gpointer func_data)
{
  if (GTK_IS_BUTTON(widget) &&
       (event->type==GDK_2BUTTON_PRESS ||
        event->type==GDK_3BUTTON_PRESS) ) {
    printf("I feel %s clicked with button %d\n",
           event->type==GDK_2BUTTON_PRESS ? "double" : "triple",
           event->button);
  }

  return FALSE;
}

I'll see about rejecting those extra events - should be an easy fix.

Peter