[yavgui] Allow drawing of looping transitions.

Right-click, drag out of the state and back, release.

* yavgui/src/g_state.cc,
* yavgui/src/g_state.hh: Do that.

ChangeLog

+2009-08-09  d-halluin  <d-halluin@lrde.epita.fr>
+
+	[yavgui] Allow drawing of looping transitions.
+
+	Right-click, drag out of the state and back, release.
+
+	* yavgui/src/g_state.cc,
+	* yavgui/src/g_state.hh: Do that.
+
 2009-08-09  d-halluin  <d-halluin@lrde.epita.fr>
 	[yavgui] Set ZValue upon (de)selection.

yavgui/src/g_state.cc

@@ -49,6 +49,7 @@ namespace gui
 	index_ (index),
 	selected_ (false),
 	drawing_transition_ (false),
+	drawing_transition_enable_self_ (false),
 	looping_transitions_ (0)
     {
       setCursor (QCursor (Qt::ArrowCursor));
@@ -236,6 +237,7 @@ namespace gui
       if (event->button () == Qt::RightButton)
       {
 	drawing_transition_ = true;
+	drawing_transition_enable_self_ = false;
 	mouse_pos_ = event->pos();
 	update_bounding_rect_();
 	update();
@@ -251,7 +253,7 @@ namespace gui
       {
 	drawing_transition_ = false;
 	GState* s = dynamic_cast<GState*>(scene()->itemAt(event->scenePos()));
-	if (s && s != this)
+	if (s && (s != this || drawing_transition_enable_self_))
 	{
 	  QString str;
 
@@ -260,6 +262,7 @@ namespace gui
 
 	  emit addTransition(s, str);
 	}
+	update();
       }
       QGraphicsItem::mouseReleaseEvent(event);
     }
@@ -276,6 +279,8 @@ namespace gui
       {
 	event->ignore();
 	mouse_pos_ = event->pos();
+	if (qAbs(mouse_pos_.x()) + qAbs(mouse_pos_.y()) > radius_)
+	  drawing_transition_enable_self_ = true;
 	update_bounding_rect_();
 	update();
 	return;

yavgui/src/g_state.hh

@@ -141,6 +141,7 @@ namespace gui
 
       // True if a transition is being drawn.
       bool drawing_transition_;
+      bool drawing_transition_enable_self_;
       QPointF mouse_pos_;
 
       int looping_transitions_;