start modifying read/write blocks and project to take into account control ifaces

[blast.git] / ConnectionItem.cpp

diff --git a/ConnectionItem.cpp b/ConnectionItem.cpp
index b6d99a5a42083a0e6dcc5d630786caa7a35e6468..78a3651dea989cac1ff8f34033bf296f3f213899 100644 (file)
--- a/ConnectionItem.cpp
+++ b/ConnectionItem.cpp
@@ -84,6 +84,13 @@ ConnectionItem::ConnectionItem(InterfaceItem* _iface1,
   setFlag(ItemSendsGeometryChanges);
   setCursor(Qt::PointingHandCursor);
   setZValue(0);
+  
+  if (fromInterfaceItem->refInter->getPurpose() == AbstractInterface::Data) {
+    visible = true;
+  }
+  else {
+    visible = false;
+  }
 
   setPath();
 }
@@ -133,6 +140,8 @@ void ConnectionItem::paint(QPainter *painter,
                            const QStyleOptionGraphicsItem *option,
                            QWidget *widget) {
 
+  if (!visible) return;
+  
   painter->setPen(Qt::blue);
   if(selected){
     painter->setPen(Qt::red);
@@ -727,13 +736,37 @@ void ConnectionItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
 }
 
 void ConnectionItem::contextMenuEvent(QGraphicsSceneContextMenuEvent * event) {
-  QMenu menu;
-  QAction* removeAction = menu.addAction("Remove");
-  QAction * selectedAction= menu.exec(event->screenPos());
+  /* have to check if the connection can be removed.
+     If the from or to InterfaceItem is owned by a group item, and this item
+     is both connected to and from, thus it is impossible to remove this connection
+   */
+  bool canRemove = true;
+  InterfaceItem* groupIfaceItem = NULL;
+  if (fromInterfaceItem->getOwner()->isGroupItem()) {
+    groupIfaceItem = fromInterfaceItem;
+  }
+  else if (toInterfaceItem->getOwner()->isGroupItem()) {
+    groupIfaceItem = toInterfaceItem;
+  }
 
-  if(selectedAction == removeAction){
-    dispatcher->removeConnection(this);
-    dispatcher->removeUselessGroupInterfaces();
+  if (groupIfaceItem != NULL) {
+    ConnectedInterface* ref = groupIfaceItem->refInter;
+    if ((ref->isConnectedFrom()) && (ref->isConnectedTo())) {
+      canRemove = false;
+    }
+  }
+
+  if (canRemove) {
+    QMenu menu;
+    QAction* titleAction = menu.addAction("Connection operations");
+    titleAction->setEnabled(false);
+    menu.addSeparator();
+    QAction* removeAction = menu.addAction("Remove");
+    QAction * selectedAction= menu.exec(event->screenPos());
+
+    if(selectedAction == removeAction){
+      dispatcher->removeConnection(this);
+    }
   }
 }