static void SetConnectorSrcDestConnectionPoints(Connector connector, ConnectionPoint srcConnectionPoint, ConnectionPoint destConnectionPoint)
{
FreeFormPanel.SetSourceConnectionPoint(connector, srcConnectionPoint);
FreeFormPanel.SetDestinationConnectionPoint(connector, destConnectionPoint);
srcConnectionPoint.AttachedConnectors.Add(connector);
destConnectionPoint.AttachedConnectors.Add(connector);
}
public static Point CalculateDropLocation(Point mousePosition, Point originalDropLocation, Connector connector, Size droppedSize, HashSet<Point> shapeLocations)
{
UIElement srcShape = FreeFormPanel.GetSourceConnectionPoint(connector).ParentDesigner;
UIElement destShape = FreeFormPanel.GetDestinationConnectionPoint(connector).ParentDesigner;
Point srcLocation = FreeFormPanel.GetLocation(srcShape);
Point destLocation = FreeFormPanel.GetLocation(destShape);
Size srcSize = FreeFormPanel.GetChildSize(srcShape);
Size destSize = FreeFormPanel.GetChildSize(destShape);
return CalculateDropLocation(mousePosition, originalDropLocation, droppedSize, srcLocation, destLocation, srcSize, destSize, shapeLocations);
}
// The method will return the CaseKey if any.
// referenceUpdatedModelItems: say A linked to B by linker C, there is a relationship:
// A.Properties["Relation"] = B.
// When delete the linker C, A will be updated like, A.Properties["Relation"] = null;
// In multiple drag/drop, the A.Properties["Relation"] is set correctly before coming
// here, which means we should not set the value again, otherwise the correct,
// value which is set previously, will be removed.
internal IFlowSwitchLink DeleteLink(Connector link, bool isMoveOrAutoSplit = false,
HashSet<ModelItem> referenceUpdatedModelItems = null)
{
IFlowSwitchLink caseKey = null;
using (EditingScope deleteLinkEditingScope =
((IModelTreeItem)this.ModelItem).ModelTreeManager.CreateEditingScope(SR.FCDeleteLink))
{
caseKey = DeleteLinkImpl(link, isMoveOrAutoSplit, referenceUpdatedModelItems);
deleteLinkEditingScope.Complete();
}
return caseKey;
}
internal int DeleteConnectorModelItem(Connector connector, bool rerouting = false)
{
ModelItem connectorModelItem = StateContainerEditor.GetConnectorModelItem(connector);
if (!rerouting)
{
if (connector is ConnectorWithStartDot)
{
connector.StartDot.MouseDown -= new MouseButtonEventHandler(OnConnectorStartDotMouseDown);
connector.StartDot.MouseUp -= new MouseButtonEventHandler(OnConnectorStartDotMouseUp);
}
connector.GotKeyboardFocus -= new KeyboardFocusChangedEventHandler(OnConnectorGotKeyboardFocus);
connector.RequestBringIntoView -= new RequestBringIntoViewEventHandler(OnConnectorRequestBringIntoView);
connector.GotFocus -= new RoutedEventHandler(OnConnectorGotFocus);
connector.MouseDoubleClick -= new MouseButtonEventHandler(OnConnectorMouseDoubleClick);
connector.MouseDown -= new MouseButtonEventHandler(OnConnectorMouseDown);
connector.KeyDown -= new KeyEventHandler(OnConnectorKeyDown);
connector.ContextMenuOpening -= new ContextMenuEventHandler(OnConnectorContextMenuOpening);
connector.Unloaded -= new RoutedEventHandler(OnConnectorUnloaded);
}
int removedIndex = InvalidIndex;
if (connectorModelItem.ItemType == typeof(Transition))
{
ModelItemCollection transitions = StateContainerEditor.GetParentStateModelItemForTransition(connectorModelItem).Properties[StateDesigner.TransitionsPropertyName].Collection;
removedIndex = transitions.IndexOf(connectorModelItem);
Fx.Assert(removedIndex >= 0, "can't find the connector ModelItem in collection");
transitions.Remove(connectorModelItem);
}
// Connector from initial node
else if (connectorModelItem.ItemType == typeof(StateMachine))
{
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(SR.ClearInitialState))
{
connectorModelItem.Properties[StateMachineDesigner.InitialStatePropertyName].SetValue(null);
if (!rerouting)
{
this.ViewStateService.StoreViewStateWithUndo(connectorModelItem, ConnectorLocationViewStateKey, null);
}
es.Complete();
}
}
return removedIndex;
}
static void SetConnectorLabel(Connector connector, ModelItem connectorModelItem)
{
connector.SetBinding(Connector.LabelTextProperty, new Binding()
{
Source = connectorModelItem,
Path = new PropertyPath("DisplayName")
});
TextBlock toolTip = new TextBlock();
toolTip.SetBinding(TextBlock.TextProperty, new Binding()
{
Source = connectorModelItem,
Path = new PropertyPath("DisplayName"),
StringFormat = TransitionNameToolTip + Environment.NewLine + SR.EditTransitionTooltip + Environment.NewLine + SR.CopyTransitionToolTip
});
connector.SetLabelToolTip(toolTip);
}
public ConnectorEditor(FreeFormPanel panel, Connector connector)
{
if (panel == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("panel"));
}
if (connector == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("connector"));
}
this.editPoints = new List<EditPoint>();
this.parentPanel = panel;
this.editedConnector = connector;
this.activeEditPoint = null;
connector.IsSelected = true;
// When the ConnectorEditor is active, we allow reconnecting the start point of the Connector instead
// of creating a new transition that shares the same trigger. So we need to disable tooltips and
// highlighting effects for all overlapping start dots.
this.SetIsHitTestVisibleForOverlappingStartDots(false);
DisplayEditPoints();
}
public static void CalculateEntryExitEdges(Point mousePosition, Connector connector, out EdgeLocation entryEdge, out EdgeLocation exitEdge)
{
UIElement srcShape = FreeFormPanel.GetSourceConnectionPoint(connector).ParentDesigner;
UIElement destShape = FreeFormPanel.GetDestinationConnectionPoint(connector).ParentDesigner;
Point srcLocation = FreeFormPanel.GetLocation(srcShape);
Point destLocation = FreeFormPanel.GetLocation(destShape);
Size srcSize = FreeFormPanel.GetChildSize(srcShape);
Size destSize = FreeFormPanel.GetChildSize(destShape);
Point srcCenter = new Point(srcLocation.X + (srcSize.Width / 2), srcLocation.Y + (srcSize.Height / 2));
Point destCenter = new Point(destLocation.X + (destSize.Width / 2), destLocation.Y + (destSize.Height / 2));
entryEdge = CalculateEdgeLocation(mousePosition, srcCenter);
exitEdge = CalculateEdgeLocation(mousePosition, destCenter);
if (exitEdge == entryEdge)
{
switch (entryEdge)
{
case EdgeLocation.Top:
exitEdge = EdgeLocation.Bottom;
break;
case EdgeLocation.Bottom:
exitEdge = EdgeLocation.Top;
break;
case EdgeLocation.Left:
exitEdge = EdgeLocation.Right;
break;
case EdgeLocation.Right:
exitEdge = EdgeLocation.Left;
break;
}
}
}
private void OnFlowchartGridKeyDown(object sender, KeyEventArgs e)
{
if (srcConnectionPoint != null)
{
// Ignore KeyBoard input when creating connector.
e.Handled = true;
return;
}
Selection currentSelection = this.Context.Items.GetValue<Selection>();
if (e.Key == Key.Delete && this.selectedConnector != null && currentSelection.SelectionCount <= 1)
{
// process the delete if only the connector is selected
ModelItem primarySelection = currentSelection.PrimarySelection;
//Delete connector
ModelItem linkModelItem = FlowchartDesigner.GetLinkModelItem(this.selectedConnector);
if ((primarySelection == null && !IsLinkModelItemSelectable(linkModelItem)) ||
object.Equals(primarySelection, linkModelItem))
{
DeleteLink(this.selectedConnector);
this.selectedConnector = null;
e.Handled = true;
}
}
else if ((new List<Key> { Key.Left, Key.Right, Key.Up, Key.Down }).Contains(e.Key)
&& currentSelection.SelectedObjects.All<ModelItem>((p) => { return this.modelElement.ContainsKey(p); }))
{
KeyboardMove(e.Key);
e.Handled = true;
}
}
// Move the object to correct position after drop
private void PostDropUpdateViewState(WorkflowViewElement view,
ModelItem flownodeMI,
AutoConnectDirections autoConnectDirection,
Connector connectorToSplit,
Point newPoint,
Point anchorPoint,
bool keepRelativePosition,
ShapeOffsetter shapeOffsetter)
{
Fx.Assert((view != null && flownodeMI != null),
"movedItem != null && flownodeMI != null");
Point shapeLocationPtr;
if (autoConnectDirection != AutoConnectDirections.None)
{
shapeLocationPtr = this.CalculateDropLocationForAutoConnect(autoConnectDirection, view.DesiredSize);
}
else
{
shapeLocationPtr = SnapVisualToGrid(view, newPoint, anchorPoint, keepRelativePosition);
if (!keepRelativePosition)
{
// To avoid overlaps
shapeLocationPtr = shapeOffsetter.OffsetShapeLocation(shapeLocationPtr);
}
}
if (connectorToSplit != null)
{
shapeLocationPtr = this.CalculateDropLocationForAutoSplit(newPoint, shapeLocationPtr, connectorToSplit, view.DesiredSize);
}
//
if (keepRelativePosition)
{
this.OffsetDroppedItemToNewPosition(flownodeMI, shapeLocationPtr);
}
else
{
this.StoreShapeViewState(flownodeMI, shapeLocationPtr);
}
}
Point CalculateDropLocationForAutoSplit(Point mousePosition, Point originalDropLocation, Connector connector, Size droppedSize)
{
return AutoSplitHelper.CalculateDropLocation(mousePosition, originalDropLocation, connector, droppedSize, this.shapeLocations);
}
// Returns the last dropped item - used for auto-connect and auto-split where only one item is allowed
ModelItem DoFlowchartGridDrop(DragEventArgs e, AutoConnectDirections autoConnectDirection, Connector connectorToSplit)
{
ModelItem droppedModelItem = null;
ModelItem newFlowStepMI = null;
e.Effects = DragDropEffects.None;
IEnumerable<object> droppedObjects = DragDropHelper.GetDroppedObjects(this, e, Context);
//Marking the event as being handled. In whichever case we want to route the event, it will be unmarked explicitly.
e.Handled = true;
List<WorkflowViewElement> movedViewElements = new List<WorkflowViewElement>();
ShapeOffsetter shapeOffsetter = new ShapeOffsetter();
Dictionary<WorkflowViewElement, Point> relativeLocations = DragDropHelper.GetDraggedViewElementRelativeLocations(e);
ModelItem modelItemDroppedFromToolBox = null;
Dictionary<object, FlowNode> objToNewFlowNodeMap = null;
Dictionary<FlowNode, ModelItem> flowNodeModelItemMap = null;
Dictionary<FlowNode, FlowNode> oldNewFlowNodeMap = null;
this.PrepareForDrop(droppedObjects,
out objToNewFlowNodeMap,
out flowNodeModelItemMap,
out oldNewFlowNodeMap);
bool shouldStoreCurrentSizeViewState = true;
foreach (object droppedObject in droppedObjects)
{
if (droppedObject == null)
{
continue;
}
droppedModelItem = droppedObject as ModelItem;
// archor point
Point anchorPoint = DragDropHelper.GetDragDropAnchorPoint(e);
ICompositeView srcContainer = droppedModelItem != null
? DragDropHelper.GetCompositeView(droppedModelItem.View as WorkflowViewElement) as ICompositeView
: null;
bool keepRelativePosition = srcContainer is FlowchartDesigner;
// This is the case of dragging from toolbox
if (anchorPoint.X < 0 && anchorPoint.Y < 0)
{
keepRelativePosition = false;
}
// This is the case of dragging from the designer surface
else if (droppedModelItem != null)
{
WorkflowViewElement view = (WorkflowViewElement)droppedModelItem.View;
anchorPoint.Offset(-relativeLocations[view].X, -relativeLocations[view].Y);
}
if (droppedModelItem != null && srcContainer != null && srcContainer.Equals(this))
{
if (shouldStoreCurrentSizeViewState)
{
// Moving may change the size of flowchart; need this to undo the size change.
this.StoreCurrentSizeViewStateWithUndo();
shouldStoreCurrentSizeViewState = false;
}
//InternalMove
PerformInternalMove(modelElement[droppedModelItem], e.GetPosition(this.panel), anchorPoint, autoConnectDirection, connectorToSplit);
}
else
{
//External model Item drop.
if (droppedModelItem != null)
{
if ((IsFlowStepAction(droppedModelItem)
|| IsFlowNode(droppedModelItem))
&& !IsParentOf(droppedModelItem, this.ModelItem))
{
if (shouldStoreCurrentSizeViewState)
{
// Drop may change the size of flowchart; need this to undo the size change.
this.StoreCurrentSizeViewStateWithUndo();
shouldStoreCurrentSizeViewState = false;
}
FlowNode flowElement = objToNewFlowNodeMap[droppedObject];
ModelItem flowElementMI;
if (flowNodeModelItemMap.TryGetValue(flowElement, out flowElementMI))
{
// FlowNode comes from some other flowchart.
this.ModelItem.Properties["Nodes"].Collection.Add(flowElementMI);
}
else
{
// FlowNode is a new created one, which means this is an Activity dragged
// from somewhere else, outside of Flowchart.
flowElementMI = this.ModelItem.Properties["Nodes"].Collection.Add(flowElement);
flowNodeModelItemMap[flowElement] = flowElementMI;
}
newFlowStepMI = flowElementMI;
}
else
{
//We want to route the event in the case that the flowchart is dropped upon itself.
if (droppedModelItem.Equals(this.ModelItem))
{
e.Handled = false;
}
//Don't add anything for what is neither a Activity nor a flowlink.
continue;
}
if (droppedModelItem != null && droppedModelItem.View != null)
{
movedViewElements.Add((WorkflowViewElement)droppedModelItem.View);
}
// the external item may come from other panel (sequence) which is already given
// a size by its previous layout panel. That might give an inaccurate size to the
// dropped object (i.e. Bug 198290). Therefore, when the object is dropped externally
// the FC should erases its previous hint size, forcing the FC to recompute an appropriate
// size based on the workflowelementview size.
VirtualizedContainerService.SetHintSize(droppedModelItem.GetCurrentValue(), null);
}
//Tool box drop.
else
{
if (typeof(Activity).IsAssignableFrom(droppedObject.GetType()))
{
FlowStep flowStep = new FlowStep();
flowStep.Action = (Activity)droppedObject;
if (shouldStoreCurrentSizeViewState)
{
// Drop may change the size of flowchart; need this to undo the size change.
this.StoreCurrentSizeViewStateWithUndo();
shouldStoreCurrentSizeViewState = false;
}
newFlowStepMI = this.ModelItem.Properties["Nodes"].Collection.Add(flowStep);
droppedModelItem = newFlowStepMI.Properties["Action"].Value;
}
else if (typeof(FlowNode).IsAssignableFrom(droppedObject.GetType()))
{
if (shouldStoreCurrentSizeViewState)
{
// Drop may change the size of flowchart; need this to undo the size change.
this.StoreCurrentSizeViewStateWithUndo();
shouldStoreCurrentSizeViewState = false;
}
droppedModelItem = this.ModelItem.Properties["Nodes"].Collection.Add(droppedObject);
newFlowStepMI = droppedModelItem;
}
// Now, toolbox drop doesn't support multiple drop
// If multi-drop from tool box, use an array here.
modelItemDroppedFromToolBox = droppedModelItem;
keepRelativePosition = false;
} // tool box
WorkflowViewElement view = droppedModelItem.View as WorkflowViewElement;
if (view == null || view.ExpandState)
{
//Creating a new view to get the size of collapsed view.
view = this.ViewService.GetView(droppedModelItem) as WorkflowViewElement;
ViewUtilities.MeasureView(view, true);
}
if (view != null)
{
PostDropUpdateViewState(view,
newFlowStepMI,
autoConnectDirection,
connectorToSplit,
e.GetPosition(this.panel),
anchorPoint,
keepRelativePosition,
shapeOffsetter);
}
} // external move
} // foreach
// Remap references.
// The re-map here is different from the remaping in copy/paste.
// In copy paste, all the values are copied. but here, some value are
// set by Properties["key"].SetValue().
// Don't move this into PrepareMove. Some value setting is added to
// Change. So the operation here will decide the order of Change.Apply().
// PropertyChange in some case, must happen after ModelItem is moved to
// new places.
foreach (FlowNode flowNode in oldNewFlowNodeMap.Keys)
{
UpdateCloneReferenceByModelItem(flowNode, flowNodeModelItemMap, oldNewFlowNodeMap);
}
DragDropHelper.SetDragDropMovedViewElements(e, movedViewElements);
//Backward compatibility for 4.0
if (droppedObjects.Count() == 1 && movedViewElements.Count == 1)
{
#pragma warning disable 618
DragDropHelper.SetDragDropCompletedEffects(e, DragDropEffects.Move);
#pragma warning restore 618
}
if (modelItemDroppedFromToolBox != null)
{
// if it is dropped from toolbox, select
this.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, (Action)(() =>
{
UIElement view = (UIElement)(modelItemDroppedFromToolBox.View);
if (view != null)
{
Keyboard.Focus(view);
Selection.SelectOnly(this.Context, modelItemDroppedFromToolBox);
}
}));
}
if (droppedModelItem != null)
{
if (IsFlowNode(droppedModelItem))
{
return droppedModelItem;
}
else if (IsFlowStepAction(droppedModelItem))
{
if (newFlowStepMI != null)
{
return newFlowStepMI;
}
else
{
return this.GetParentFlowStepModelItem(droppedModelItem);
}
}
return null;
}
return null;
}
void Reroute(Connector connector, bool withUndo)
{
ConnectionPoint source = FreeFormPanel.GetSourceConnectionPoint(connector);
ConnectionPoint destination = FreeFormPanel.GetDestinationConnectionPoint(connector);
//Nulling out the PointCollection so that it doesn't interfere in line routing.
connector.Points = new PointCollection();
PointCollection viewState = new PointCollection(ConnectorRouter.Route(this.panel, source, destination));
StoreConnectorViewState(FlowchartDesigner.GetLinkModelItem(connector), viewState, source, withUndo);
}
void ClearSelectedConnector()
{
if (this.panel.connectorEditor != null && this.panel.connectorEditor.Connector == this.selectedConnector)
{
this.panel.RemoveConnectorEditor();
}
this.selectedConnector = null;
}
//This is to keep this.selectedConnector upto date.
//Eg. cases included 1. create a link, select it and undo, 2. Move a link from one shape to another.
void OnFreeFormPanelLayoutUpdated(object sender, EventArgs e)
{
if (!this.panel.Children.Contains(this.selectedConnector))
{
this.selectedConnector = null;
}
}
void SetConnectorLabelToolTip(Connector connector, BindingBase binding)
{
connector.SetBinding(Connector.LabelTextProperty, binding);
ToolTip toolTip = new ToolTip();
toolTip.SetBinding(UserControl.ContentProperty, binding);
connector.SetLabelToolTip(toolTip);
}
void OnFreeFormPanelConnectorMoved(object sender, ConnectorMovedEventArgs e)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
Connector movedConnector = sender as Connector;
int movedEndConnectorPointIndex = movedConnector.Points.Count - 1;
int newEndConnectorPointIndex = e.NewConnectorLocation.Count - 1;
if (movedConnector != null)
{
Fx.Assert(e.NewConnectorLocation.Count > 0, "Invalid connector editor");
if (!e.NewConnectorLocation[0].Equals(movedConnector.Points[0]))
{
//srcMoved
ConnectionPoint destConnPoint = FreeFormPanel.GetDestinationConnectionPoint(movedConnector);
UpdateFlowchartOnLinkVisualMoved(destConnPoint, e.NewConnectorLocation[0], movedConnector, false);
}
else if (!e.NewConnectorLocation[newEndConnectorPointIndex].Equals(movedConnector.Points[movedEndConnectorPointIndex]))
{
//DestMoved
ConnectionPoint srcConnPoint = FreeFormPanel.GetSourceConnectionPoint(movedConnector);
Point destPoint = e.NewConnectorLocation[newEndConnectorPointIndex];
UpdateFlowchartOnLinkVisualMoved(srcConnPoint, destPoint, movedConnector, true);
}
this.selectedConnector = movedConnector;
}
}
// Returns the last dropped item - used for auto-connect and auto-split where only one item is allowed
ModelItem DoStateContainerGridDrop(DragEventArgs e, AutoConnectDirections autoConnectDirection, Connector connectorToSplit)
{
ModelItem droppedModelItem = null;
e.Effects = DragDropEffects.None;
IEnumerable<object> droppedObjects = DragDropHelper.GetDroppedObjects(this, e, Context);
// Marking the event as being handled. In whichever case we want to route the event, it will be unmarked explicitly.
e.Handled = true;
List<ModelItem> modelItemsToSelect = new List<ModelItem>();
Dictionary<WorkflowViewElement, Point> relativeLocations = DragDropHelper.GetDraggedViewElementRelativeLocations(e);
foreach (object droppedObject in droppedObjects)
{
if (droppedObject != null)
{
droppedModelItem = droppedObject as ModelItem;
bool isAnchorPointValid = true;
Point anchorPoint = DragDropHelper.GetDragDropAnchorPoint(e);
// This is the case of dragging from toolbox
if (anchorPoint.X < 0 && anchorPoint.Y < 0)
{
isAnchorPointValid = false;
}
// This is the case of dragging from the designer surface
else if (droppedModelItem != null)
{
WorkflowViewElement view = droppedModelItem.View as WorkflowViewElement;
anchorPoint.Offset(-relativeLocations[view].X, -relativeLocations[view].Y);
}
StateContainerEditor srcContainer = droppedModelItem != null
? DragDropHelper.GetCompositeView(droppedModelItem.View as WorkflowViewElement) as StateContainerEditor
: null;
bool externalDrop = false;
if (droppedModelItem != null && srcContainer != null && srcContainer.Equals(this))
{
// Internal move
PerformInternalMove(this.modelItemToUIElement[droppedModelItem], e.GetPosition(this.panel), anchorPoint, autoConnectDirection, connectorToSplit);
}
else
{
// External model Item drop
if (droppedModelItem != null)
{
if (droppedModelItem.ItemType == typeof(State) && this.ModelItem.ItemType == typeof(StateMachine))
{
this.InsertState(droppedModelItem);
externalDrop = true;
}
}
// Toolbox drop.
else
{
if (droppedObject.GetType() == typeof(State))
{
if (((State)droppedObject).DisplayName == null)
{
((State)droppedObject).DisplayName = GenerateStateName();
}
droppedModelItem = InsertState(droppedObject);
}
else if (droppedObject.GetType() == typeof(FinalState))
{
droppedModelItem = InsertState(new State()
{
DisplayName = DefaultFinalStateDisplayName,
IsFinal = true
});
}
}
if (droppedModelItem != null)
{
modelItemsToSelect.Add(droppedModelItem);
UIElement view = null;
if (this.modelItemToUIElement.ContainsKey(droppedModelItem))
{
view = this.modelItemToUIElement[droppedModelItem];
}
else
{
view = droppedModelItem.View as WorkflowViewElement;
if (view == null)
{
view = this.Context.Services.GetService<ViewService>().GetView(droppedModelItem) as WorkflowViewElement;
ViewUtilities.MeasureView(view as WorkflowViewElement, true);
}
}
// If drag anchor point is beyond the size of the shape being dropped,
if (anchorPoint.X > view.DesiredSize.Width || anchorPoint.Y > view.DesiredSize.Height)
{
isAnchorPointValid = false;
}
Point shapeLocation;
if (autoConnectDirection != AutoConnectDirections.None)
{
shapeLocation = this.CalculateDropLocationForAutoConnect(autoConnectDirection, new Size(DefaultStateDesignerWidth, DefaultStateDesignerHeight));
}
else
{
shapeLocation = StateContainerEditor.SnapVisualToGrid(view, e.GetPosition(this.panel), anchorPoint, isAnchorPointValid);
}
if (connectorToSplit != null)
{
shapeLocation = this.CalculateDropLocationForAutoSplit(e.GetPosition(this.panel), shapeLocation, connectorToSplit, new Size(DefaultStateDesignerWidth, DefaultStateDesignerHeight));
}
object viewState = this.ViewStateService.RetrieveViewState(droppedModelItem, ShapeLocationViewStateKey);
if (externalDrop)
{
Fx.Assert(viewState != null, "item dropped from external should already have view states");
Fx.Assert(droppedModelItem.View != null, "item dropped from extenal should already have view");
VirtualizedContainerService.VirtualizingContainer container = VisualTreeUtils.FindVisualAncestor<VirtualizedContainerService.VirtualizingContainer>(droppedModelItem.View);
Fx.Assert(container != null, "container should not be null");
Point oldLocation = (Point)viewState;
oldLocation = srcContainer.panel.GetLocationRelativeToOutmostPanel(oldLocation);
Point newLocation = this.panel.GetLocationRelativeToOutmostPanel(shapeLocation);
// To make sure the connectors are still connected to the connection points
OffsetConnectorViewState(container, oldLocation, newLocation, true);
}
this.StoreShapeLocationViewState(droppedModelItem, shapeLocation);
}
}
}
}
DragDropHelper.SetDragDropMovedViewElements(e, new WorkflowViewElement[] { });
this.Dispatcher.BeginInvoke(() =>
{
bool first = true;
foreach (ModelItem modelItem in modelItemsToSelect)
{
if (first)
{
Keyboard.Focus((IInputElement)modelItem.View);
Selection.SelectOnly(this.Context, modelItem);
first = false;
}
else
{
Selection.Union(this.Context, modelItem);
}
}
},
DispatcherPriority.ApplicationIdle);
return droppedModelItem;
}
void OnStateContainerGridPreviewMouseDown(object sender, MouseButtonEventArgs e)
{
this.selectedConnector = null;
}
static bool IsConnectorFromInitialNode(Connector connector)
{
return GetConnectorModelItem(connector).ItemType == typeof(StateMachine);
}
void Remove(Connector connector)
{
ConnectionPoint srcConnectionPoint = FreeFormPanel.GetSourceConnectionPoint(connector);
ConnectionPoint destConnectionPoint = FreeFormPanel.GetDestinationConnectionPoint(connector);
// Update ConnectionPoints
srcConnectionPoint.AttachedConnectors.Remove(connector);
destConnectionPoint.AttachedConnectors.Remove(connector);
StateContainerEditor stateMachineContainer = this.GetStateMachineContainerEditor();
stateMachineContainer.panel.Children.Remove(connector);
if (stateMachineContainer.selectedConnector == connector)
{
stateMachineContainer.ClearSelectedConnector();
}
if (connector is ConnectorWithStartDot)
{
connector.StartDot.MouseDown -= new MouseButtonEventHandler(OnConnectorStartDotMouseDown);
connector.StartDot.MouseUp -= new MouseButtonEventHandler(OnConnectorStartDotMouseUp);
}
connector.GotKeyboardFocus -= new KeyboardFocusChangedEventHandler(OnConnectorGotKeyboardFocus);
connector.RequestBringIntoView -= new RequestBringIntoViewEventHandler(OnConnectorRequestBringIntoView);
connector.GotFocus -= new RoutedEventHandler(OnConnectorGotFocus);
connector.MouseDoubleClick -= new MouseButtonEventHandler(OnConnectorMouseDoubleClick);
connector.MouseDown -= new MouseButtonEventHandler(OnConnectorMouseDown);
connector.KeyDown -= new KeyEventHandler(OnConnectorKeyDown);
connector.ContextMenuOpening -= new ContextMenuEventHandler(OnConnectorContextMenuOpening);
connector.Unloaded -= new RoutedEventHandler(OnConnectorUnloaded);
}
public void DoAutoSplit(DragEventArgs e, Connector connector)
{
bool immediatelyCommit = ModelItemHelper.CanCreateImmediateEditingScope(this.ModelItem);
using (EditingScope scope = (EditingScope)this.ModelItem.BeginEdit(SR.AutoSplit, immediatelyCommit))
{
ModelItem droppedModelItem = this.DoStateContainerGridDrop(e, AutoConnectDirections.None, connector);
bool autoSplit = false;
ConnectionPoint sourceConnectionPoint = FreeFormPanel.GetSourceConnectionPoint(connector);
ConnectionPoint destinationConnectionPoint = FreeFormPanel.GetDestinationConnectionPoint(connector);
if (droppedModelItem != null)
{
ModelItem oldConnectorModelItem = StateContainerEditor.GetConnectorModelItem(connector);
int index = this.DeleteConnectorModelItem(connector);
bool autoConnected = this.DoAutoConnect(sourceConnectionPoint.ParentDesigner,
droppedModelItem, oldConnectorModelItem.GetCurrentValue() as Transition, index) != null;
if (autoConnected)
{
ModelItem destinationModelItem = ((VirtualizedContainerService.VirtualizingContainer)destinationConnectionPoint.ParentDesigner).ModelItem;
ModelItem stateMachineModelItem = GetStateMachineModelItem(destinationModelItem);
droppedModelItem.Properties[StateDesigner.TransitionsPropertyName].Collection.Add(new Transition()
{
DisplayName = StateContainerEditor.GenerateTransitionName(stateMachineModelItem),
To = destinationModelItem.GetCurrentValue() as State
});
autoSplit = true;
}
}
if (autoSplit)
{
// Auto-split generates 4 changes: 1) drop state, 2) remove the old transition, 3) create a transition from the source state
// to the dropped state, and 4) create a transition from the dropped state to the destination state.
// Step 1 may result in creating the visual of all outgoing transition from the dropped state. Step 4) also creates the visual
// of the new transition from the dropped state. So the visual of the transition will be created twice. To solve that problem,
// we need to suppress adding connector when adding state visual (in the UI reaction for step 1).
// And to support redo, we must place the suppression in the undo stack.
this.Context.Services.GetService<ModelTreeManager>().AddToCurrentEditingScope(new SuppressAddingConnectorWhenAddingStateVisual());
this.activeSrcConnectionPointForAutoSplit = sourceConnectionPoint;
this.activeDestConnectionPointForAutoSplit = destinationConnectionPoint;
AutoSplitHelper.CalculateEntryExitEdges(e.GetPosition(this.panel), connector, out this.entryEdgeForAutoSplit, out this.exitEdgeForAutoSplit);
scope.Complete();
}
else
{
scope.Revert();
}
}
}
private void OnFlowchartGridPreviewMouseDown(object sender, MouseButtonEventArgs e)
{
this.selectedConnector = null;
}
public void DoAutoSplit(DragEventArgs e, Connector connector)
{
bool immediatelyCommit = ModelItemHelper.CanCreateImmediateEditingScope(this.ModelItem);
using (EditingScope scope = (EditingScope)this.ModelItem.BeginEdit(SR.AutoSplit, immediatelyCommit))
{
ModelItem droppedModelItem = this.DoFlowchartGridDrop(e, AutoConnectDirections.None, connector);
bool autoSplit = false;
ModelItem sourceModelItem = null;
ModelItem destinationModelItem = null;
if (droppedModelItem != null)
{
this.StoreConnectorViewState(connector, true);
IFlowSwitchLink flowSwitchLink = this.DeleteLink(connector, true);
bool linkCreated = true;
string message = string.Empty;
UIElement srcDesigner = FreeFormPanel.GetSourceConnectionPoint(connector).ParentDesigner;
UIElement destDesigner = FreeFormPanel.GetDestinationConnectionPoint(connector).ParentDesigner;
if (srcDesigner is StartSymbol)
{
sourceModelItem = this.ModelItem;
this.ModelItem.Properties["StartNode"].SetValue(droppedModelItem);
}
else if (srcDesigner is VirtualizedContainerService.VirtualizingContainer)
{
sourceModelItem = ((VirtualizedContainerService.VirtualizingContainer)srcDesigner).ModelItem;
ModelItem srcFlowNodeModelItem = sourceModelItem;
if (!IsFlowNode(srcFlowNodeModelItem))
{
srcFlowNodeModelItem = this.GetParentFlowStepModelItem(srcFlowNodeModelItem);
}
Fx.Assert(IsFlowNode(srcFlowNodeModelItem), "srcFlowNodeModelItem should be a FlowNode");
if (typeof(FlowStep) == srcFlowNodeModelItem.ItemType)
{
srcFlowNodeModelItem.Properties["Next"].SetValue(droppedModelItem);
}
else if (typeof(FlowDecision) == srcFlowNodeModelItem.ItemType && FreeFormPanel.GetSourceConnectionPoint(connector).Equals(GetTrueConnectionPoint(srcDesigner)))
{
srcFlowNodeModelItem.Properties["True"].SetValue(droppedModelItem);
}
else if (typeof(FlowDecision) == srcFlowNodeModelItem.ItemType && FreeFormPanel.GetSourceConnectionPoint(connector).Equals(GetFalseConnectionPoint(srcDesigner)))
{
srcFlowNodeModelItem.Properties["False"].SetValue(droppedModelItem);
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(srcFlowNodeModelItem.ItemType))
{
linkCreated = CreateFlowSwitchLink(FreeFormPanel.GetSourceConnectionPoint(connector), srcFlowNodeModelItem, droppedModelItem, flowSwitchLink, null, ref message);
}
}
if (linkCreated && string.IsNullOrEmpty(message))
{
destinationModelItem = ((VirtualizedContainerService.VirtualizingContainer)destDesigner).ModelItem;
ModelItem destFlowNodeModelItem = destinationModelItem;
if (!IsFlowNode(destFlowNodeModelItem))
{
destFlowNodeModelItem = this.GetParentFlowStepModelItem(destFlowNodeModelItem);
}
Fx.Assert(IsFlowNode(destFlowNodeModelItem), "destFlowNodeModelItem should be a FlowNode");
if (droppedModelItem.ItemType == typeof(FlowStep))
{
droppedModelItem.Properties["Next"].SetValue(destFlowNodeModelItem);
autoSplit = true;
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(droppedModelItem.ItemType))
{
droppedModelItem.Properties["Default"].SetValue(destFlowNodeModelItem);
autoSplit = true;
}
else if (droppedModelItem.ItemType == typeof(FlowDecision))
{
droppedModelItem.Properties["True"].SetValue(destFlowNodeModelItem);
autoSplit = true;
}
}
}
if (autoSplit)
{
Fx.Assert(sourceModelItem != null, "sourceModelItem != null");
Fx.Assert(destinationModelItem != null, "destinationModelItem != null");
int srcIndex = GetConnectionPointIndex(this.GetView(sourceModelItem), FreeFormPanel.GetSourceConnectionPoint(connector));
int desIndex = GetConnectionPointIndex(this.GetView(destinationModelItem), FreeFormPanel.GetDestinationConnectionPoint(connector));
EdgeLocation entryEdgeForAutoSplit;
EdgeLocation exitEdgeForAutoSplit;
AutoSplitHelper.CalculateEntryExitEdges(e.GetPosition(this.panel),
connector, out entryEdgeForAutoSplit, out exitEdgeForAutoSplit);
FlowchartDesigner.SetAutoSplitDataWithUndo(
this.ModelItem, sourceModelItem, destinationModelItem, srcIndex, desIndex, entryEdgeForAutoSplit, exitEdgeForAutoSplit);
scope.Complete();
}
else
{
scope.Revert();
}
}
}
void PerformInternalMove(UIElement movedElement, Point newPoint, Point? shapeAnchorPoint,
AutoConnectDirections autoConnectDirection, Connector connectorToSplit)
{
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(SR.FCLinkMove))
{
RemoveAdorner(movedElement, typeof(ConnectionPointsAdorner));
Point shapeLocation;
Size size = FreeFormPanel.GetChildSize(movedElement);
if (autoConnectDirection != AutoConnectDirections.None)
{
shapeLocation = this.CalculateDropLocationForAutoConnect(autoConnectDirection, size);
}
else if (shapeAnchorPoint.HasValue)
{
shapeLocation = SnapVisualToGrid(movedElement, newPoint, shapeAnchorPoint.Value, true);
}
else
{
Fx.Assert(newPoint.X.IsNoLessThan(0) && newPoint.Y.IsNoLessThan(0),
"newPoint is negative");
shapeLocation = newPoint;
}
if (connectorToSplit != null)
{
shapeLocation = this.CalculateDropLocationForAutoSplit(newPoint, shapeLocation, connectorToSplit, size);
}
StoreShapeViewState(movedElement, shapeLocation);
RerouteAttachedConnectors(movedElement);
es.Complete();
}
}
void UpdateFlowchartOnLinkVisualMoved(ConnectionPoint knownConnectionPoint, Point newPoint, Connector movedConnector, bool isSourceKnown)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
HitTestResult hitTestResult = VisualTreeHelper.HitTest(this.panel, newPoint);
if (hitTestResult == null)
{
return;
}
//Test if the last connectionPoint hit, is the new location for the connector.
UIElement newViewElement = null;
ConnectionPoint newConnectionPoint = null;
//The case where the link is dropped on a connectionpoint.
if (this.lastConnectionPointMouseUpElement != null)
{
newConnectionPoint = this.ConnectionPointHitTest(this.lastConnectionPointMouseUpElement, newPoint);
if (newConnectionPoint != null)
{
newViewElement = this.lastConnectionPointMouseUpElement;
}
}
//The case where the link is dropped on a shape.
if (newViewElement == null)
{
newViewElement = VisualTreeUtils.FindVisualAncestor<StartSymbol>(hitTestResult.VisualHit);
if (newViewElement == null)
{
newViewElement = VisualTreeUtils.FindVisualAncestor<VirtualizedContainerService.VirtualizingContainer>(hitTestResult.VisualHit);
}
}
if (newViewElement != null)
{
if (this.panel.Children.Contains(newViewElement))
{
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(SR.FCLinkMove))
{
//Delete the existing link and keep the caseKey
IFlowSwitchLink oldCaseKey = this.DeleteLink(movedConnector, true);
//Create new link
bool linkCreated = false;
string errorMessage = string.Empty;
if (isSourceKnown)
{
if (newConnectionPoint == null)
{
linkCreated = CreateLinkGesture(knownConnectionPoint, newViewElement, newPoint, out errorMessage, true, oldCaseKey);
}
else
{
linkCreated = CreateLinkGesture(knownConnectionPoint, newConnectionPoint, out errorMessage, true, oldCaseKey);
}
}
else
{
//If the Link source is dropped onto itself, we need to set the isLinkValidDueToLinkMove flag.
bool isLinkValidDueToLinkMove = FreeFormPanel.GetSourceConnectionPoint(movedConnector).ParentDesigner.Equals(newViewElement);
if (newConnectionPoint == null)
{
linkCreated = CreateLinkGesture(newViewElement, knownConnectionPoint, newPoint, out errorMessage, isLinkValidDueToLinkMove, oldCaseKey);
}
else
{
linkCreated = CreateLinkGesture(newConnectionPoint, knownConnectionPoint, out errorMessage, isLinkValidDueToLinkMove, oldCaseKey);
}
}
if (!linkCreated)
{
if (!errorMessage.Equals(string.Empty))
{
ErrorReporting.ShowErrorMessage(errorMessage);
}
es.Revert();
}
else
{
es.Complete();
}
}
}
}
}
void PerformInternalMove(UIElement movedElement, Point newPoint, Point? shapeAnchorPoint, AutoConnectDirections autoConnectDirection, Connector connectorToSplit)
{
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(SR.ItemMove))
{
StoreShapeSizeWithUndoRecursively(this.ModelItem);
this.RemoveConnectionPointsAdorner(movedElement);
Point newLocation;
Size size = FreeFormPanel.GetChildSize(movedElement);
if (autoConnectDirection != AutoConnectDirections.None)
{
newLocation = this.CalculateDropLocationForAutoConnect(autoConnectDirection, size);
}
else if (shapeAnchorPoint.HasValue)
{
newLocation = SnapVisualToGrid(movedElement, newPoint, shapeAnchorPoint.Value, true);
}
else
{
Fx.Assert(newPoint.X.IsNoLessThan(0) && newPoint.Y.IsNoLessThan(0),
"newPoint is negative");
newLocation = newPoint;
}
if (connectorToSplit != null)
{
newLocation = this.CalculateDropLocationForAutoSplit(newPoint, newLocation, connectorToSplit, size);
}
ModelItem modelItem = GetModelItemFromView(movedElement);
object viewState = this.ViewStateService.RetrieveViewState(modelItem, ShapeLocationViewStateKey);
if (viewState != null)
{
Point oldLocation = (Point)viewState;
// To make sure the connectors are still connected to the connection points.
// We don't need to offset non-contained connectors because internal move
// won't cause the connectors to be recreated and we have code in FreeFormPanel
// to guarantee that connectors will still be connected to the connection points
this.OffsetConnectorViewState(movedElement, oldLocation, newLocation, false);
}
else
{
this.StoreAttachedConnectorViewStates(movedElement);
}
this.StoreShapeLocationViewState(movedElement, newLocation);
// To make sure the connector changes are undoable
this.panel.RemoveConnectorEditor();
es.Complete();
}
}
void SetConnectorLabel(Connector connector, ConnectionPoint srcConnPoint, ModelItem linkModelItem)
{
BindingBase labelBinding = null;
if (typeof(FlowDecision).IsAssignableFrom(linkModelItem.ItemType))
{
if (FlowchartDesigner.GetTrueConnectionPoint(srcConnPoint.ParentDesigner).Equals(srcConnPoint))
{
labelBinding = new Binding { Source = linkModelItem, Path = new PropertyPath("TrueLabel") };
}
else
{
labelBinding = new Binding { Source = linkModelItem, Path = new PropertyPath("FalseLabel") };
}
SetConnectorLabelToolTip(connector, labelBinding);
}
else if (typeof(IFlowSwitchLink).IsAssignableFrom(linkModelItem.ItemType))
{
IFlowSwitchLink flowSwitchLink = (IFlowSwitchLink)linkModelItem.GetCurrentValue();
labelBinding = flowSwitchLink.CreateConnectorLabelTextBinding();
SetConnectorLabelToolTip(connector, labelBinding);
}
}
void OnConnectorGotFocus(object sender, RoutedEventArgs e)
{
Connector clickedLine = e.Source as Connector;
DesignerView designerView = this.Context.Services.GetService<DesignerView>();
if (!designerView.IsMultipleSelectionMode)
{
if (this.panel.connectorEditor == null || !clickedLine.Equals(this.panel.connectorEditor.Connector))
{
this.panel.RemoveConnectorEditor();
this.panel.connectorEditor = new ConnectorEditor(this.panel, clickedLine);
}
if (this.panel.Children.Contains(clickedLine))
{
this.updatingSelectedConnector = true;
ModelItem lineModelItem = FlowchartDesigner.GetLinkModelItem(clickedLine);
Selection newSelection = new Selection();
// If the linkModelItem is FlowDecision or Flowchart, we don't want to add it to the selection
if (IsLinkModelItemSelectable(lineModelItem))
{
newSelection = new Selection(lineModelItem);
}
this.Context.Items.SetValue(newSelection);
this.selectedConnector = clickedLine;
this.updatingSelectedConnector = false;
e.Handled = true;
}
}
}
public FlowchartDesigner()
{
InitializeComponent();
this.modelElement = new Dictionary<ModelItem, UIElement>();
this.flowNodeToUIElement = new Dictionary<ModelItem, UIElement>();
this.shapeLocations = new HashSet<Point>();
this.selectedConnector = null;
ConstructSetAsStartNodeMenuItem();
this.Loaded += (s, e) =>
{
this.isLoaded = true;
if (this.ShowExpanded)
{
((ICompositeViewEvents)this).RegisterDefaultCompositeView(this);
}
DesignerView designerView = this.Context.Services.GetService<DesignerView>() as DesignerView;
if (!designerView.ContextMenu.Items.Contains(setAsStartNode))
{
designerView.ContextMenu.Items.Add(setAsStartNode);
}
WorkflowCommandExtensionItem item = this.Context.Items.GetValue<WorkflowCommandExtensionItem>();
if (item != null)
{
if (item.CommandExtensionCallback is DefaultCommandExtensionCallback)
{
this.InputBindings.Add(new KeyBinding(FlowchartDesignerCommands.ConnectNodesCommand, new DefaultCommandExtensionCallback.ChordKeyGesture(Key.E, Key.F)));
}
}
Selection.Subscribe(Context, OnSelectionChanged);
};
this.Unloaded += (s, e) =>
{
this.isLoaded = false;
if (object.Equals(this.DefaultCompositeView, this))
{
((ICompositeViewEvents)this).UnregisterDefaultCompositeView(this);
}
DesignerView designerView = this.Context.Services.GetService<DesignerView>() as DesignerView;
designerView.ContextMenu.Items.Remove(setAsStartNode);
Selection.Unsubscribe(Context, OnSelectionChanged);
};
}
void StoreConnectorViewState(Connector connector, bool isUndoableViewState)
{
//This method will be called whenever the FreeFormPanel raises a location changed event on a connector.
//Such location changed events are a result of changes already commited in the UI. Hence we do not want to react to such view state changes.
//Using internalViewStateChange flag for that purpose.
this.internalViewStateChange = true;
this.StoreConnectorViewState(FlowchartDesigner.GetLinkModelItem(connector), connector.Points, FreeFormPanel.GetSourceConnectionPoint(connector), isUndoableViewState);
this.internalViewStateChange = false;
}