private bool HandleUndoOperation(GraphCommand command)
{
DeltaNodes deltaNodes = new DeltaNodes();
// Start tracking variables being undefined in this process.
{
RuntimeStates runtimeStates = this.GetRuntimeStates();
runtimeStates.BeginDefinitionMonitor();
this.undoRedoRecorder.Undo(deltaNodes);
Dictionary <uint, List <string> > undefinedVariables = null;
runtimeStates.EndDefinitionMonitor(out undefinedVariables);
deltaNodes.AppendUndefinedVariables(undefinedVariables);
}
this.ValidateNodesSyntax(this.nodeCollection.Values.ToList <IVisualNode>());
this.ValidateDefinedAndReferencedVariables();
if (false == deltaNodes.IsEmpty)
{
this.SynchronizeToLiveRunner(deltaNodes);
}
this.UpdateDirtyNodes();
this.edgeController.UpdateDirtyEdges(deltaNodes.ModifiedNodes);
selectionBox.UpdateSelectionBox(GetSelectedNodes());
return(true);
}
private bool HandleDeleteComponents(GraphCommand command)
{
if (currentDragState != DragState.None)
{
currentDragState = DragState.None;
edgeController.ResetParameters();
}
DeltaNodes deltaNodes = new DeltaNodes();
foreach (VisualNode node in nodeCollection.Values)
{
if (node.Selected)
{
deltaNodes.AppendToRemovedNodes(node);
}
}
if ((null == deltaNodes.RemovedNodes) && edgeController.SelectedEdgeCount() == 0)
{
return(true);
}
if (null != deltaNodes.RemovedNodes && (deltaNodes.RemovedNodes.Count > 0))
{
deltaNodes.AppendToModifiedNodes(FindAssociatedNodesFromNodes(deltaNodes.RemovedNodes));
}
List <IVisualNode> nodesConnectToEdge = edgeController.GetNodesFromSelectedEdges();
foreach (IVisualNode node in nodesConnectToEdge)
{
bool inDeleteList = (null != deltaNodes.RemovedNodes && (deltaNodes.RemovedNodes.Contains(node)));
bool inModifyList = (null != deltaNodes.ModifiedNodes && (deltaNodes.ModifiedNodes.Contains(node)));
if (!inDeleteList && !inModifyList)
{
deltaNodes.AppendToModifiedNodes(node);
}
}
// Begin tracking variables being undefined in this process.
{
RuntimeStates runtimeStates = this.GetRuntimeStates();
runtimeStates.BeginDefinitionMonitor();
this.undoRedoRecorder.BeginGroup();
this.undoRedoRecorder.RecordRuntimeStatesForUndo(this.graphProperties.RuntimeStates);
this.undoRedoRecorder.RecordNodeDeletionForUndo(deltaNodes.RemovedNodes);
this.undoRedoRecorder.RecordNodeModificationForUndo(deltaNodes.ModifiedNodes);
this.edgeController.DeleteSelectedEdges();
this.DeleteNodes(deltaNodes.RemovedNodes);
this.ValidateDefinedAndReferencedVariables();
this.UpdateSlotsVisiblity();
EstablishImplicitConnections(this.nodeCollection.Values.ToList());
this.undoRedoRecorder.EndGroup();
// Gather the data of variables being undefined.
Dictionary <uint, List <string> > undefinedVariables = null;
runtimeStates.EndDefinitionMonitor(out undefinedVariables);
deltaNodes.AppendUndefinedVariables(undefinedVariables);
}
//After DeleteSelectedEdges() and DeleteNodes() are executed, the nodes in the nodeToModify would already be modified
if (false == deltaNodes.IsEmpty)
{
this.SynchronizeToLiveRunner(deltaNodes);
}
this.UpdateDirtyNodes();
//If the node is selected for deletion by clicking on the preview, the lastHoveredNode should be reset
lastHoveredNodeId = uint.MaxValue;
selectionBox.UpdateSelectionBox(GetSelectedNodes());
return(true);
}
private bool HandleEndDrag(GraphCommand command)
{
MouseButton button = ((MouseButton)command.GetArgument(0));
uint compId = ((uint)command.GetArgument(1));
NodePart nodePart = ((NodePart)command.GetArgument(2));
int slotIndex = ((int)command.GetArgument(3));
ModifierKeys modifiers = ((ModifierKeys)command.GetArgument(4));
double mouseX = ((double)command.GetArgument(5));
double mouseY = ((double)command.GetArgument(6));
switch (currentDragState)
{
case DragState.NodeRepositioning:
foreach (DraggedNode draggedNode in dragSet)
{
((VisualNode)draggedNode.node).X = mouseX - draggedNode.DeltaX;
((VisualNode)draggedNode.node).Y = mouseY - draggedNode.DeltaY;
}
// both node that the edge is connected to should be bring to back
//
foreach (VisualNode connectingNode in edgeController.GetNodesFromSelectedEdges())
{
if (!connectingNode.Selected)
{
RearrangeNodeAndBubbleVisual(connectingNode, false);
}
}
dragSet.Clear();
edgeController.ResetAllEdges();
break;
case DragState.CurveDrawing:
case DragState.EdgeReconnection:
edgeConnection = EdgeConnectionFlag.None;
VisualNode node = GetVisualNode(edgeController.GetConnectNodeId());
if (null != node)
{
node.PreviewSelected = node.Selected;
node.Compose(); // Optionally redraw the node.
}
node = GetVisualNode(edgeController.GetCurrentlySelectedNodeId());
if (null != node)
{
node.Selected = false;
node.Compose(); // reset highlighted node
}
node = GetVisualNode(compId);
List <IVisualNode> modifiedNodes = null;
edgeConnection = edgeController.AttemptConnectEdge(node, nodePart, slotIndex, out modifiedNodes);
DeltaNodes deltaNodes = new DeltaNodes();
deltaNodes.AppendToModifiedNodes(modifiedNodes.Distinct().ToList());
//reset highlighted node
foreach (IVisualNode visualNode in deltaNodes.ModifiedNodes)
{
((VisualNode)visualNode).Selected = false;
}
// Start tracking variables being undefined in this process.
{
RuntimeStates runtimeStates = graphProperties.RuntimeStates;
runtimeStates.BeginDefinitionMonitor();
undoRedoRecorder.BeginGroup();
undoRedoRecorder.RecordRuntimeStatesForUndo(runtimeStates);
undoRedoRecorder.RecordNodeModificationForUndo(deltaNodes.ModifiedNodes);
edgeController.CreateEdge();
modifiedNodes.Clear();
this.EstablishImplicitConnections(modifiedNodes);
undoRedoRecorder.EndGroup();
Dictionary <uint, List <string> > undefinedVariables = null;
runtimeStates.EndDefinitionMonitor(out undefinedVariables);
deltaNodes.AppendUndefinedVariables(undefinedVariables);
}
deltaNodes.AppendToModifiedNodes(modifiedNodes);
if (deltaNodes.ModifiedNodes.Count > 0) //modification have been done
{
SynchronizeToLiveRunner(deltaNodes);
}
else
{
undoRedoRecorder.PopRecordFromUndoStorage();
}
edgeController.ResetParameters();
edgeController.ResetAllEdges();
currentDragState = DragState.None;
edgeConnection = EdgeConnectionFlag.None;
break;
case DragState.RegionSelection:
if (visualHost != null)
{
visualHost.EndDragSelection();
}
break;
}
//currentDragState = DragState.None;
selectionBox.UpdateSelectionBox(GetSelectedNodes());
return(true);
}