changed connection process

[blast.git] / ConnectionItem.cpp

diff --git a/ConnectionItem.cpp b/ConnectionItem.cpp
index dee71ba7e16d8d6ad552edae85086edf0a218867..c99d489918461c3d2a79e208443a80293ccfef13 100644 (file)
--- a/ConnectionItem.cpp
+++ b/ConnectionItem.cpp
@@ -12,8 +12,7 @@
 ConnectionItem::ConnectionItem(InterfaceItem* _iface1,
                                InterfaceItem* _iface2,
                                Dispatcher* _dispatcher,
-                               Parameters* _params,
-                               QGraphicsItem *_parent) : QGraphicsItem(_parent) {
+                               Parameters* _params) : QGraphicsItem() {
 
 
   dispatcher = _dispatcher;
@@ -25,6 +24,8 @@ ConnectionItem::ConnectionItem(InterfaceItem* _iface1,
      case 1 : ref1 is group interface, and ref2 block interface of a block within the group
      case 2 : the opposite of case 1
      case 3 : ref1 and ref2 are block interface of blocks that are both within the same parent group.
+     case 4 : ref1 is source interface and ref2 interface of top group
+     case 5 : the opposite of case 4
    */
   if (ref1->getOwner() == ref2->getOwner()->getParent()) {
 
@@ -72,6 +73,14 @@ ConnectionItem::ConnectionItem(InterfaceItem* _iface1,
       fromInterfaceItem = _iface1;
     }
   }
+  else if ((ref1->getOwner()->isSourceBlock()) && (ref2->getOwner()->isTopGroupBlock())) {    
+    fromInterfaceItem = _iface1;    
+    toInterfaceItem = _iface2;
+  }
+  else if ((ref2->getOwner()->isSourceBlock()) && (ref1->getOwner()->isTopGroupBlock())) {    
+    fromInterfaceItem = _iface2;    
+    toInterfaceItem = _iface1;
+  }
   // adding this to interface items
   fromInterfaceItem->addConnectionItem(this);
   toInterfaceItem->addConnectionItem(this);
@@ -84,8 +93,15 @@ ConnectionItem::ConnectionItem(InterfaceItem* _iface1,
   setFlag(ItemSendsGeometryChanges);
   setCursor(Qt::PointingHandCursor);
   setZValue(0);
+  
+  if (fromInterfaceItem->refInter->getPurpose() == AbstractInterface::Data) {
+    visible = true;
+  }
+  else {
+    visible = false;
+  }
 
-  setPathes();
+  setPath();
 }
 
 
@@ -133,6 +149,8 @@ void ConnectionItem::paint(QPainter *painter,
                            const QStyleOptionGraphicsItem *option,
                            QWidget *widget) {
 
+  if (!visible) return;
+  
   painter->setPen(Qt::blue);
   if(selected){
     painter->setPen(Qt::red);
@@ -145,12 +163,35 @@ void ConnectionItem::addInterPoint(QPointF point) {
 
 }
 
-void ConnectionItem::setPathes() {
+void ConnectionItem::setPath() {
 
+  // signals to the scene that this connection is going to change of shape.
   prepareGeometryChange();
 
-  pointFrom = fromInterfaceItem->getEndPointInGroup();
-  pointTo = toInterfaceItem->getEndPointInGroup();
+  bool withinGroup = false;
+  /* NB: four cases
+     1: from group input iface to box input iface
+     2: from output box iface to group output iface
+     3: from output box iface to input box iface
+     4: from source output iface to input group iface
+   
+    For cases 1 & 2, the position of group iface is given by getStartPosition
+    For all other cases, the iface from and to position is given by getEndPosition
+   */
+  if ((fromInterfaceItem->getOwner()->isGroupItem()) && (toInterfaceItem->getOwner()->isBoxItem())) {
+    pointFrom = fromInterfaceItem->getStartPosition();
+    pointTo = toInterfaceItem->getEndPosition();
+    withinGroup = true;
+  }
+  else if ((toInterfaceItem->getOwner()->isGroupItem()) && (fromInterfaceItem->getOwner()->isBoxItem())) {
+    pointFrom = fromInterfaceItem->getEndPosition();
+    pointTo = toInterfaceItem->getStartPosition();
+    withinGroup = true;
+  }
+  else {
+    pointFrom = fromInterfaceItem->getEndPosition();
+    pointTo = toInterfaceItem->getEndPosition();
+  }
 
   int oriFrom, oriTo;
   oriFrom = fromInterfaceItem->getOrientation();
@@ -159,36 +200,38 @@ void ConnectionItem::setPathes() {
 /* NB: if src or dest is onwed by a GroupItem the orientation
    must be changed as it is a block.
  */
-  if(fromInterfaceItem->owner->isGroupItem()){
-    switch(fromInterfaceItem->getOrientation()){
-    case Parameters::North :
-      oriFrom = Parameters::South;
-      break;
-    case Parameters::South :
-      oriFrom = Parameters::North;
-      break;
-    case Parameters::East :
-      oriFrom = Parameters::West;
-      break;
-    case Parameters::West :
-      oriFrom = Parameters::East;
-      break;
-    }
-  }
-  if(toInterfaceItem->owner->isGroupItem()){
-    switch(toInterfaceItem->getOrientation()){
-    case Parameters::North :
-      oriTo = Parameters::South;
-      break;
-    case Parameters::South :
-      oriTo = Parameters::North;
-      break;
-    case Parameters::East :
-      oriTo = Parameters::West;
-      break;
-    case Parameters::West :
-      oriTo = Parameters::East;
-      break;
+  if (withinGroup) {
+    if(fromInterfaceItem->owner->isGroupItem()){
+      switch(fromInterfaceItem->getOrientation()){
+      case Parameters::North :
+        oriFrom = Parameters::South;
+        break;
+      case Parameters::South :
+        oriFrom = Parameters::North;
+        break;
+      case Parameters::East :
+        oriFrom = Parameters::West;
+        break;
+      case Parameters::West :
+        oriFrom = Parameters::East;
+        break;
+      }
+    }
+    else if(toInterfaceItem->owner->isGroupItem()){
+      switch(toInterfaceItem->getOrientation()){
+      case Parameters::North :
+        oriTo = Parameters::South;
+        break;
+      case Parameters::South :
+        oriTo = Parameters::North;
+        break;
+      case Parameters::East :
+        oriTo = Parameters::West;
+        break;
+      case Parameters::West :
+        oriTo = Parameters::East;
+        break;
+      }
     }
   }
   double gap1 = 0.0;
@@ -726,13 +769,37 @@ 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);
+    }
   }
 }