When no instance is selected, show the polar coordinates of the current

pointer position relative to the user origin in the radius/angle fields.
This helps to make quick manual measurements, e.g., of clearances.

This also fixes the following bug:
- gui_canvas.c (refresh_pos): showed canvas coordinates instead of model
  coordinates



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5755 99fdad57-331a-0410-800a-d7fa5415bdb3

gui_status.c

@@ -155,6 +155,16 @@ void status_set_xy(struct coord coord)
 }
 
 
+void status_set_angle_xy(struct coord v)
+{
+	if (!v.x && !v.y)
+		status_set_angle("a = 0 deg");
+	else
+		status_set_angle("a = %3.1f deg", theta_vec(v));
+
+}
+
+
 static void entry_color(GtkWidget *widget, const char *color)
 {
 	GdkColor col;