From 1df2e532395f4400bdefcfa8d8681d4defc800ac Mon Sep 17 00:00:00 2001
From: dfighter1985 <dfighter1985@localhost>
Date: Sun, 14 Sep 2014 15:36:41 +0200
Subject: [PATCH] Added unlinking support.

---
 .../plugins/gui_editor/expression_editor.cpp    | 17 +++++++++++++++++
 .../src/plugins/gui_editor/expression_editor.h  |  1 +
 .../src/plugins/gui_editor/expression_link.cpp  |  2 ++
 .../src/plugins/gui_editor/expression_node.h    |  3 ++-
 4 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/code/studio/src/plugins/gui_editor/expression_editor.cpp b/code/studio/src/plugins/gui_editor/expression_editor.cpp
index c4d5c1948..1c4a1ecda 100644
--- a/code/studio/src/plugins/gui_editor/expression_editor.cpp
+++ b/code/studio/src/plugins/gui_editor/expression_editor.cpp
@@ -65,6 +65,9 @@ void ExpressionEditor::contextMenuEvent( QContextMenuEvent *e )
 			a = menu.addAction( "Link" );
 			connect( a, SIGNAL( triggered() ), this, SLOT( onLinkItems() ) );
 		}
+
+		a = menu.addAction( "Unlink" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onUnLinkItems() ) );
 	}
 
 	menu.exec( e->globalPos() );
@@ -150,4 +153,18 @@ void ExpressionEditor::onLinkItems()
 	m_scene->addItem( link );
 }
 
+void ExpressionEditor::onUnLinkItems()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+
+	for( int i = 0; i < l.count(); i++ )
+	{
+		ExpressionNode *node = dynamic_cast< ExpressionNode* >( l[ i ] );
+		if( node == NULL )
+			continue;
+
+		node->clearLinks();
+	}
+}
+
 
diff --git a/code/studio/src/plugins/gui_editor/expression_editor.h b/code/studio/src/plugins/gui_editor/expression_editor.h
index 70d2ad572..00d347993 100644
--- a/code/studio/src/plugins/gui_editor/expression_editor.h
+++ b/code/studio/src/plugins/gui_editor/expression_editor.h
@@ -39,6 +39,7 @@ private Q_SLOTS:
 	void onDeleteSelection();
 	void onSelectionChanged();
 	void onLinkItems();
+	void onUnLinkItems();
 
 private:
 
diff --git a/code/studio/src/plugins/gui_editor/expression_link.cpp b/code/studio/src/plugins/gui_editor/expression_link.cpp
index 66ddffd7f..537d4891f 100644
--- a/code/studio/src/plugins/gui_editor/expression_link.cpp
+++ b/code/studio/src/plugins/gui_editor/expression_link.cpp
@@ -58,6 +58,8 @@ void ExpressionLink::unlink()
 
 	m_from = NULL;
 	m_to = NULL;
+
+	delete this;
 }
 
 void ExpressionLink::nodeMoved()
diff --git a/code/studio/src/plugins/gui_editor/expression_node.h b/code/studio/src/plugins/gui_editor/expression_node.h
index 704804b55..4fb92cbf4 100644
--- a/code/studio/src/plugins/gui_editor/expression_node.h
+++ b/code/studio/src/plugins/gui_editor/expression_node.h
@@ -47,13 +47,14 @@ public:
 
 	void getSlots( QList< SlotInfo > &l );
 
+	void clearLinks();
+
 protected:
 	void mouseMoveEvent( QGraphicsSceneMouseEvent *e );
 
 private:
 	void createSlots();
 	void paintSlots( QPainter *painter );
-	void clearLinks();
 
 	qreal m_w;
 	qreal m_h;