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);
}
protected void DrawConnectionPoint(ConnectionPoint connPoint, Point actualLocation, DrawingContext drawingContext)
{
if (connPoint.IsEnabled)
{
// actualLocation is the point on the Edge with respect to the coordinate system defined by the top left corner of the adorned element
// We will need this transparent rectangle to make sure OnMouseOver event can be triggered, for hit test.
drawingContext.DrawRectangle(Brushes.Transparent, new Pen(Brushes.Transparent, 0),
new Rect(actualLocation + connPoint.HitTestOffset, connPoint.HitTestSize));
drawingContext.DrawRectangle(this.renderBrush, this.renderPen,
new Rect(actualLocation + connPoint.DrawingOffset, connPoint.DrawingSize));
}
}
internal static ConnectionPoint ConnectionPointHitTest(Point hitPoint, List <ConnectionPoint> connectionPoints, FreeFormPanel panel)
{
ConnectionPoint hitConnectionPoint = null;
FreeFormPanel outmost = panel.GetOutmostPanel();
foreach (ConnectionPoint connPoint in connectionPoints)
{
if (connPoint != null && connPoint.IsEnabled)
{
if (new Rect(panel.TranslatePoint(connPoint.Location, outmost) + connPoint.HitTestOffset, connPoint.HitTestSize).Contains(hitPoint))
{
hitConnectionPoint = connPoint;
break;
}
}
}
return(hitConnectionPoint);
}
public static ConnectionPoint GetClosestConnectionPoint(List <ConnectionPoint> connectionPoints, Point refPoint, out double minDist)
{
minDist = double.PositiveInfinity;
if (connectionPoints == null || connectionPoints.Count == 0)
{
return(null);
}
double dist = 0;
ConnectionPoint closestPoint = null;
foreach (ConnectionPoint point in connectionPoints)
{
dist = DesignerGeometryHelper.DistanceBetweenPoints(refPoint, point.Location);
if (dist < minDist)
{
minDist = dist;
closestPoint = point;
}
}
return(closestPoint);
}
void ConnectionPoint_MouseDown(object sender, MouseButtonEventArgs e)
{
UIElement srcElement = ((Adorner)sender).AdornedElement as UIElement;
this.srcConnectionPoint = ConnectionPointHitTest(srcElement, e.GetPosition(this.panel));
e.Handled = true;
}
private void OnFlowchartGridMouseUp(object sender, MouseButtonEventArgs e)
{
if (this.srcConnectionPoint != null)
{
RemoveAdorner(this.panel, typeof(ConnectorCreationAdorner));
this.srcConnectionPoint = null;
}
}
private ConnectionPoint GetSourceConnectionPointForAutoSplit(ConnectionPoint destConnPoint, UIElement srcDesigner)
{
this.MeasureView(srcDesigner);
ConnectionPoint point = this.GetEmptyEdgeMidConnectionPointNotOfType(srcDesigner, this.exitEdgeForAutoSplit, ConnectionPointKind.Incoming);
if (point == null)
{
point = this.FindClosestConnectionPointNotOfType(destConnPoint, new List<ConnectionPoint>(FlowchartDesigner.GetConnectionPoints(srcDesigner).Where<ConnectionPoint>(p =>
{
return p.AttachedConnectors.Count == 0;
})), ConnectionPointKind.Incoming);
}
return point;
}
public void DoAutoConnect(DragEventArgs e, UIElement targetElement, AutoConnectDirections direction)
{
UIElement sourceElement = targetElement;
bool immediatelyCommit = ModelItemHelper.CanCreateImmediateEditingScope(this.ModelItem);
using (EditingScope scope = (EditingScope)this.ModelItem.BeginEdit(SR.AutoConnect, immediatelyCommit))
{
ModelItem droppedModelItem = this.DoFlowchartGridDrop(e, direction, null);
bool autoConnected = false;
if (droppedModelItem != null)
{
ModelItem sourceModelItem = this.GetSourceModelItemForAutoConnect(sourceElement);
if (sourceModelItem != null)
{
if (sourceModelItem.ItemType == typeof(FlowStep))
{
sourceModelItem.Properties["Next"].SetValue(droppedModelItem);
autoConnected = true;
}
else if (sourceModelItem.ItemType == typeof(FlowDecision))
{
if (direction == AutoConnectDirections.Left)
{
sourceModelItem.Properties["True"].SetValue(droppedModelItem);
autoConnected = true;
}
else if (direction == AutoConnectDirections.Right)
{
sourceModelItem.Properties["False"].SetValue(droppedModelItem);
autoConnected = true;
}
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(sourceModelItem.ItemType))
{
string message = string.Empty;
autoConnected = this.CreateFlowSwitchLink(this.srcConnectionPointForAutoConnect, sourceModelItem, droppedModelItem, null, null, ref message);
}
else if (sourceModelItem.ItemType == typeof(StartNode))
{
this.ModelItem.Properties["StartNode"].SetValue(droppedModelItem);
autoConnected = true;
}
}
}
if (autoConnected)
{
this.srcConnectionPointForAutoConnect = this.GetSourceConnectionPointForAutoConnect(sourceElement, AutoConnectHelper.AutoConnectDirection2EdgeLocation(direction));
scope.Complete();
}
else
{
scope.Revert();
}
}
}
private void OnFlowchartGridPreviewMouseUp(object sender, MouseButtonEventArgs e)
{
if (this.srcConnectionPoint != null)
{
UIElement destElement = VisualTreeUtils.FindVisualAncestor<VirtualizedContainerService.VirtualizingContainer>(e.OriginalSource as DependencyObject);
if (destElement != null && this.panel.Children.Contains(destElement))
{
string errorMessage = string.Empty;
Point mouseUpLocation = e.GetPosition(sender as IInputElement);
if (!CreateLinkGesture(this.srcConnectionPoint, destElement, mouseUpLocation, out errorMessage, false, null) && !errorMessage.Equals(string.Empty))
{
ErrorReporting.ShowErrorMessage(errorMessage);
}
this.srcConnectionPoint = null;
RemoveAdorner(this.panel, typeof(ConnectorCreationAdorner));
RemoveAdorner(destElement, typeof(FlowchartConnectionPointsAdorner));
// Simulate a MouseEnter to show connection points
ChildElement_MouseEnter(destElement, null);
}
}
}
void StoreConnectorViewState(ModelItem linkModelItem, PointCollection viewState, ConnectionPoint srcConnPoint)
{
StoreConnectorViewState(linkModelItem, viewState, srcConnPoint, true);
}
static internal ConnectionPoint GetClosestConnectionPoint(ConnectionPoint srcConnPoint, List<ConnectionPoint> destConnPoints, out double minDist)
{
minDist = double.PositiveInfinity;
double dist = 0;
ConnectionPoint closestPoint = null;
Point srcPoint = FreeFormPanel.GetLocationRelativeToOutmostPanel(srcConnPoint);
foreach (ConnectionPoint destConnPoint in destConnPoints)
{
if (srcConnPoint != destConnPoint)
{
dist = DesignerGeometryHelper.ManhattanDistanceBetweenPoints(srcPoint, FreeFormPanel.GetLocationRelativeToOutmostPanel(destConnPoint));
if (dist < minDist)
{
minDist = dist;
closestPoint = destConnPoint;
}
}
}
return closestPoint;
}
// Create a connector by view state of the connector model item, and if failed, just create a connector using the connection points
// of the source and destination designers. Then add the connector created to the free form panel.
void AddConnector(
UIElement sourceDesigner,
UIElement destinationDesigner,
ModelItem connectorModelItem,
ConnectionPoint sourceConnectionPoint = null,
ConnectionPoint destinationConnectionPoint = null)
{
// Check whether connector already exists.
// If users programmatically add state with transition to the stateMachine, AddConnector will be called twice for one connectorModelItem.
if (GetConnectorInStateMachine(connectorModelItem) != null)
{
return;
}
Connector connector = CreateConnectorByConnectorModelItemViewState(sourceDesigner, destinationDesigner, connectorModelItem);
if (connector == null)
{
PointCollection connectorPoints = this.CreatePointCollectionForAutoConnectOrAutoSplit(sourceDesigner, destinationDesigner, connectorModelItem, ref sourceConnectionPoint, ref destinationConnectionPoint);
if (connectorPoints != null)
{
connector = CreateConnector(sourceConnectionPoint, destinationConnectionPoint, connectorPoints, connectorModelItem);
this.ViewStateService.StoreViewState(connectorModelItem, ConnectorLocationViewStateKey, connectorPoints);
}
}
if (connector != null)
{
this.panel.Children.Add(connector);
}
}
static public Point GetLocationRelativeToOutmostPanel(ConnectionPoint connectionPoint)
{
return(connectionPoint.Location);
}
static public List <Point> GetEdgeRelativeToOutmostPanel(ConnectionPoint connectionPoint)
{
return(connectionPoint.Edge);
}
public static void SetSourceConnectionPoint(DependencyObject obj, ConnectionPoint connectionPoint)
{
obj.SetValue(FreeFormPanel.SourceConnectionPointProperty, connectionPoint);
}
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 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);
}
}
static ConnectionPoint GetClosestConnectionPointNotOfType(ConnectionPoint srcConnectionPoint, List<ConnectionPoint> targetConnectionPoints, ConnectionPointKind illegalConnectionPointKind)
{
double minDist;
List<ConnectionPoint> filteredConnectionPoints = new List<ConnectionPoint>();
foreach (ConnectionPoint connPoint in targetConnectionPoints)
{
if (connPoint.PointType != illegalConnectionPointKind && !connPoint.Equals(srcConnectionPoint) && connPoint.AttachedConnectors.Count == 0)
{
filteredConnectionPoints.Add(connPoint);
}
}
return GetClosestConnectionPoint(srcConnectionPoint, filteredConnectionPoints, out minDist);
}
//Save the connector.Points property on the CFx object for serialization and viewstate maintenance.
void StoreConnectorViewState(ModelItem linkModelItem, PointCollection viewState, ConnectionPoint srcConnPoint, bool isUndoableViewState)
{
ModelItem storageModelItem = GetConnectorViewStateStorageModelItem(linkModelItem);
string viewStateKey = GetConnectorViewStateKey(linkModelItem, srcConnPoint);
StoreConnectorViewState(storageModelItem, viewStateKey, viewState, isUndoableViewState);
}
static void GetClosestConnectionPointPair(List<ConnectionPoint> srcConnPoints, List<ConnectionPoint> destConnPoints, out ConnectionPoint srcConnPoint, out ConnectionPoint destConnPoint)
{
double minDist = double.PositiveInfinity;
double dist;
ConnectionPoint tempConnPoint;
srcConnPoint = null;
destConnPoint = null;
foreach (ConnectionPoint connPoint in srcConnPoints)
{
tempConnPoint = GetClosestConnectionPoint(connPoint, destConnPoints, out dist);
if (dist < minDist)
{
minDist = dist;
srcConnPoint = connPoint;
destConnPoint = tempConnPoint;
}
}
Fx.Assert(srcConnPoint != null, "No ConnectionPoint found");
Fx.Assert(destConnPoint != null, "No ConnectionPoint found");
}
string GetConnectorViewStateKey(ModelItem linkModelItem, ConnectionPoint srcConnPoint)
{
string viewStateKey = ConnectorViewStateKey;
if ((typeof(FlowDecision).IsAssignableFrom(linkModelItem.ItemType)))
{
if (srcConnPoint.Equals(FlowchartDesigner.GetTrueConnectionPoint(this.modelElement[linkModelItem])))
{
viewStateKey = TrueConnectorViewStateKey;
}
else
{
viewStateKey = FalseConnectorViewStateKey;
}
}
else if (typeof(IFlowSwitchLink).IsAssignableFrom(linkModelItem.ItemType))
{
IFlowSwitchLink link = (IFlowSwitchLink)linkModelItem.GetCurrentValue();
if (link.IsDefaultCase)
{
viewStateKey = FlowSwitchDefaultViewStateKey;
}
else
{
viewStateKey = link.CaseName + CaseViewStateKeyAppendString;
}
}
return viewStateKey;
}
static void GetEmptySrcDestConnectionPoints(UIElement source, UIElement dest, out ConnectionPoint srcConnPoint, out ConnectionPoint destConnPoint)
{
srcConnPoint = null;
destConnPoint = null;
List<ConnectionPoint> srcConnectionPoints = GetEmptyConnectionPoints(source);
List<ConnectionPoint> destConnectionPoints = GetEmptyConnectionPoints(dest);
if (srcConnectionPoints.Count > 0 && destConnectionPoints.Count > 0)
{
GetClosestConnectionPointPair(srcConnectionPoints, destConnectionPoints, out srcConnPoint, out destConnPoint);
}
}
internal static ConnectionPoint GetDestinationConnectionPointForAutoConnect(UIElement dest, ConnectionPoint srcConnPoint)
{
EdgeLocation destEdgeLocation = EdgeLocation.Top;
if (!((dest is VirtualizedContainerService.VirtualizingContainer) && ((VirtualizedContainerService.VirtualizingContainer)dest).ModelItem.ItemType == typeof(FlowDecision)))
{
switch (srcConnPoint.EdgeLocation)
{
case EdgeLocation.Top:
destEdgeLocation = EdgeLocation.Bottom;
break;
case EdgeLocation.Bottom:
destEdgeLocation = EdgeLocation.Top;
break;
case EdgeLocation.Left:
destEdgeLocation = EdgeLocation.Right;
break;
case EdgeLocation.Right:
destEdgeLocation = EdgeLocation.Left;
break;
}
}
List<ConnectionPoint> destConnectionPoints = new List<ConnectionPoint>(FlowchartDesigner.GetConnectionPoints(dest).Where<ConnectionPoint>((p) =>
{
return p.PointType != ConnectionPointKind.Outgoing && p.EdgeLocation == destEdgeLocation;
}));
Fx.Assert(destConnectionPoints.Count > 0, "There should be at least one dest connection point available");
return FlowchartDesigner.GetConnectionPointForAutoConnect(destConnectionPoints);
}
//This returns the closest non-incoming connectionPoint on source. Return value will be different than destConnectionPoint.
static ConnectionPoint GetClosestSrcConnectionPoint(UIElement src, ConnectionPoint destConnectionPoint)
{
ConnectionPoint srcConnectionPoint = null;
if (destConnectionPoint.PointType != ConnectionPointKind.Outgoing)
{
srcConnectionPoint = GetClosestConnectionPointNotOfType(destConnectionPoint, StateContainerEditor.GetConnectionPoints(src), ConnectionPointKind.Incoming);
}
return srcConnectionPoint;
}
internal static int GetConnectionPointIndex(UIElement element, ConnectionPoint pnt)
{
List<ConnectionPoint> list = FlowchartDesigner.GetAllConnectionPoints(element);
return list.IndexOf(pnt);
}
//This returns the closest non-outgoing connectionPoint on dest. Return value will be different than sourceConnectionPoint.
static ConnectionPoint GetClosestDestConnectionPoint(ConnectionPoint sourceConnectionPoint, UIElement dest)
{
ConnectionPoint destConnectionPoint = null;
if (sourceConnectionPoint.PointType != ConnectionPointKind.Incoming)
{
destConnectionPoint = GetClosestConnectionPointNotOfType(sourceConnectionPoint, StateContainerEditor.GetConnectionPoints(dest), ConnectionPointKind.Outgoing);
}
return destConnectionPoint;
}
private void OnFlowchartGridMouseLeave(object sender, MouseEventArgs e)
{
bool endLinkCreation = !IsVisualHit(sender as UIElement, sender as UIElement, e.GetPosition(sender as IInputElement));
if (endLinkCreation)
{
RemoveAdorner(this.panel, typeof(ConnectorCreationAdorner));
this.srcConnectionPoint = null;
}
}
//widthFraction, heightFraction determine location of connectionpoint on the shape.
ConnectionPoint CreateConnectionPoint(UIElement element, double widthFraction, double heightFraction, EdgeLocation location)
{
ConnectionPoint connectionPoint = new ConnectionPoint();
connectionPoint.EdgeLocation = location;
connectionPoint.PointType = ConnectionPointKind.Default;
connectionPoint.ParentDesigner = element;
BindingOperations.SetBinding(connectionPoint, ConnectionPoint.LocationProperty, GetConnectionPointBinding(element as FrameworkElement, widthFraction, heightFraction));
return connectionPoint;
}
static void SetTrueConnectionPoint(DependencyObject obj, ConnectionPoint connectionPoint)
{
obj.SetValue(FlowchartDesigner.TrueConnectionPointProperty, connectionPoint);
}
void GetSrcDestConnectionPoints(UIElement source, UIElement dest, out ConnectionPoint srcConnPoint, out ConnectionPoint destConnPoint, out string errorMessage)
{
srcConnPoint = null;
destConnPoint = null;
errorMessage = string.Empty;
VirtualizedContainerService.VirtualizingContainer sourceContainer = source as VirtualizedContainerService.VirtualizingContainer;
if (sourceContainer != null && typeof(FlowDecision).IsAssignableFrom(sourceContainer.ModelItem.ItemType))
{
srcConnPoint = FindFlowDecisionSrcConnectionPoint(source, out errorMessage);
if (srcConnPoint != null)
{
destConnPoint = FindBestMatchDestConnectionPoint(srcConnPoint, dest, out errorMessage);
}
}
else
{
List<ConnectionPoint> srcConnectionPoints = FlowchartDesigner.GetConnectionPoints(source);
List<ConnectionPoint> destConnectionPoints = FlowchartDesigner.GetConnectionPoints(dest);
if (sourceContainer != null && GenericFlowSwitchHelper.IsGenericFlowSwitch(sourceContainer.ModelItem.ItemType))
{
FindBestMatchConnectionPointPair(srcConnectionPoints, destConnectionPoints, out srcConnPoint, out destConnPoint);
}
else
{
// Flowstep
FindBestMatchConnectionPointPair(srcConnectionPoints, destConnectionPoints, out srcConnPoint, out destConnPoint);
}
}
}
void ConnectionPoint_MouseUp(object sender, MouseButtonEventArgs e)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
UIElement dest = ((Adorner)sender).AdornedElement as UIElement;
Fx.Assert(dest != null, "Adorned element is not a UIElement");
if (this.srcConnectionPoint != null)
{
ConnectionPoint destConnectionPoint = ConnectionPointHitTest(dest, e.GetPosition(this.panel));
if (destConnectionPoint != null && !this.srcConnectionPoint.Equals(destConnectionPoint))
{
string errorMessage = string.Empty;
if (!CreateLinkGesture(this.srcConnectionPoint, destConnectionPoint, out errorMessage, null) && !errorMessage.Equals(string.Empty))
{
ErrorReporting.ShowErrorMessage(errorMessage);
}
}
this.srcConnectionPoint = null;
RemoveAdorner(this.panel, typeof(ConnectorCreationAdorner));
RemoveAdorner(dest, typeof(FlowchartConnectionPointsAdorner));
}
else
{
//This will cause the FreeFormPanel to handle the event and is useful while moving connection end points of a connector.
lastConnectionPointMouseUpElement = dest;
dest.RaiseEvent(e);
}
}
//This returns the closest non-outgoing connectionPoint on dest. Return value will be different than sourceConnectionPoint.
ConnectionPoint ClosestDestConnectionPoint(ConnectionPoint sourceConnectionPoint, UIElement dest, out string errorMessage)
{
ConnectionPoint destConnectionPoint = null;
errorMessage = string.Empty;
if (sourceConnectionPoint.PointType != ConnectionPointKind.Incoming)
{
destConnectionPoint = FindClosestConnectionPointNotOfType(sourceConnectionPoint, FlowchartDesigner.GetConnectionPoints(dest), ConnectionPointKind.Outgoing);
}
else
{
errorMessage = SR.FCInvalidLink;
}
return destConnectionPoint;
}
Connector GetConnector(ModelItem linkModelItem, ConnectionPoint srcConnPoint, ConnectionPoint destConnPoint)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
ConnectorWithoutStartDot connector = new ConnectorWithoutStartDot();
connector.FocusVisualStyle = null;
connector.Focusable = true;
DesignerView.SetCommandMenuMode(connector, CommandMenuMode.NoCommandMenu);
SetConnectorLabel(connector, srcConnPoint, linkModelItem);
connector.GotKeyboardFocus += new KeyboardFocusChangedEventHandler(OnConnectorGotKeyboardFocus);
connector.RequestBringIntoView += new RequestBringIntoViewEventHandler(OnConnectorRequestBringIntoView);
connector.MouseDown += new MouseButtonEventHandler(OnConnectorMouseDown);
connector.GotFocus += new RoutedEventHandler(OnConnectorGotFocus);
SetConnectorSrcDestConnectionPoints(connector, srcConnPoint, destConnPoint);
FlowchartDesigner.SetLinkModelItem(connector, linkModelItem);
connector.Unloaded += new RoutedEventHandler(OnConnectorUnloaded);
connector.AutoSplitContainer = this;
return connector;
}
//This returns the closest non-Incoming connectionPoint on source. Return value will be different than destConnectionPoint.
ConnectionPoint ClosestSrcConnectionPoint(UIElement src, ConnectionPoint destConnectionPoint, out string errorMessage)
{
ConnectionPoint sourceConnectionPoint = null;
errorMessage = string.Empty;
if (destConnectionPoint.PointType != ConnectionPointKind.Outgoing)
{
VirtualizedContainerService.VirtualizingContainer srcContainer = src as VirtualizedContainerService.VirtualizingContainer;
if (srcContainer != null && typeof(FlowDecision).IsAssignableFrom(srcContainer.ModelItem.ItemType))
{
sourceConnectionPoint = FindFlowDecisionSrcConnectionPoint(src, out errorMessage);
}
else
{
sourceConnectionPoint = FindClosestConnectionPointNotOfType(destConnectionPoint, FlowchartDesigner.GetConnectionPoints(src), ConnectionPointKind.Incoming);
}
}
else
{
errorMessage = SR.FCInvalidLink;
}
return sourceConnectionPoint;
}
//Returns a new connector if viewstate exists, null otherwise.
Connector GetConnectorViewState(UIElement source, UIElement dest, ModelItem linkModelItem, ConnectionPoint sourceConnectionPoint)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
Connector connector = null;
object connectorLocation = null;
if (typeof(FlowDecision).IsAssignableFrom(linkModelItem.ItemType))
{
Fx.Assert(sourceConnectionPoint != null, "Source connection point is null.");
if (sourceConnectionPoint.Equals(FlowchartDesigner.GetTrueConnectionPoint(this.modelElement[linkModelItem])))
{
connectorLocation = this.ViewStateService.RetrieveViewState(linkModelItem, TrueConnectorViewStateKey);
}
else
{
connectorLocation = this.ViewStateService.RetrieveViewState(linkModelItem, FalseConnectorViewStateKey);
}
}
else if (typeof(IFlowSwitchLink).IsAssignableFrom(linkModelItem.ItemType))
{
string key = null;
IFlowSwitchLink link = (IFlowSwitchLink)linkModelItem.GetCurrentValue();
if (link.IsDefaultCase)
{
key = FlowSwitchDefaultViewStateKey;
}
else
{
key = link.CaseName + CaseViewStateKeyAppendString;
}
//Transitioning from fake ModelItem world to real ModelItem world.
ModelItem realFSModelItem = (this.ModelItem as IModelTreeItem).ModelTreeManager.WrapAsModelItem(link.ParentFlowSwitch);
connectorLocation = this.ViewStateService.RetrieveViewState(realFSModelItem, key);
}
else
{
connectorLocation = this.ViewStateService.RetrieveViewState(linkModelItem, ConnectorViewStateKey);
}
PointCollection locationPts = connectorLocation as PointCollection;
if (locationPts != null)
{
ConnectionPoint srcConnPoint, destConnPoint;
System.Diagnostics.Debug.WriteLine(this.isLoaded ? "About to call ConnectionPointHitTest - Loaded" : "About to call ConnectionPointHitTest - Not Loaded");
srcConnPoint = ConnectionPointHitTest(source, locationPts[0]);
destConnPoint = ConnectionPointHitTest(dest, locationPts[locationPts.Count - 1]);
//In Debug mode, the size of the designer changes due to the debug adorner(border). Because of this connection points will move and
//won't coincide with the viewstate.
//The following code path is added for the scenario where we reload the flowchart designer by navigating back and forth on breadcrumb
//when one of the flowchart activities has the debug border.
//In this scenario we try to find the closest connection point from the end point stored in viewstate. If the distance between the two
//is within the acceptable range, we will reuse the viewstate and avoid re-drawing the connector.
if (this.IsReadOnly)
{
ConnectionPoint pt;
double dist;
if (srcConnPoint == null)
{
pt = FindClosestConnectionPoint(locationPts[0], FlowchartDesigner.GetConnectionPoints(source), out dist);
if (pt != null && pt.PointType != ConnectionPointKind.Incoming && dist <= DebugTimeMaxConnectorShapeDist)
{
srcConnPoint = pt;
}
}
if (destConnPoint == null)
{
pt = FindClosestConnectionPoint(locationPts[locationPts.Count - 1], FlowchartDesigner.GetConnectionPoints(dest), out dist);
if (pt != null && pt.PointType != ConnectionPointKind.Outgoing && dist <= DebugTimeMaxConnectorShapeDist)
{
destConnPoint = pt;
}
}
}
if (srcConnPoint != null && destConnPoint != null)
{
connector = GetConnector(linkModelItem, srcConnPoint, destConnPoint);
connector.Points = locationPts;
}
}
return connector;
}
void UpdateEditPoints(Point newPoint)
{
if (this.editPoints.Count < 2 ||
this.editPoints[0].Type != EditPoint.EditPointTypes.ConnectionEditPoint ||
this.editPoints[this.editPoints.Count - 1].Type != EditPoint.EditPointTypes.ConnectionEditPoint)
{
Fx.Assert(false, "EditPoints are invalid");
return;
}
if (this.activeEditPoint != null)
{
int activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint);
EditPoint previous = (activeEditPointIndex > 0) ? this.editPoints[activeEditPointIndex - 1] : null;
EditPoint next = (activeEditPointIndex < this.editPoints.Count - 1) ? this.editPoints[activeEditPointIndex + 1] : null;
//Note that extra edit points are only added if we are connected to connection point
if (previous != null && previous.Type == EditPoint.EditPointTypes.ConnectionEditPoint)
{
double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(previous.Location, this.activeEditPoint.Location);
Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
int editPointOffset = Convert.ToInt32(DesignerGeometryHelper.DistanceBetweenPoints(previous.Location, (next != null) ? next.Location : this.activeEditPoint.Location)) / 4;
if (orientation == Orientation.Horizontal)
{
editPointOffset *= (previous.Location.X < this.activeEditPoint.Location.X) ? 1 : -1;
}
else
{
editPointOffset *= (previous.Location.Y < this.activeEditPoint.Location.Y) ? 1 : -1;
}
activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint);
Point editPointLocation = (orientation == Orientation.Horizontal) ? new Point(previous.Location.X + editPointOffset, previous.Location.Y) : new Point(previous.Location.X, previous.Location.Y + editPointOffset);
previous = new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation);
this.editPoints.InsertRange(activeEditPointIndex, new EditPoint[] { new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation), previous });
}
if (next != null && next.Type == EditPoint.EditPointTypes.ConnectionEditPoint)
{
double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(this.activeEditPoint.Location, next.Location);
Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
int editPointOffset = Convert.ToInt32(DesignerGeometryHelper.DistanceBetweenPoints((previous != null) ? previous.Location : this.activeEditPoint.Location, next.Location)) / 4;
if (orientation == Orientation.Horizontal)
{
editPointOffset *= (this.activeEditPoint.Location.X < next.Location.X) ? -1 : 1;
}
else
{
editPointOffset *= (this.activeEditPoint.Location.Y < next.Location.Y) ? -1 : 1;
}
activeEditPointIndex = this.editPoints.IndexOf(this.activeEditPoint);
Point editPointLocation = (orientation == Orientation.Horizontal) ? new Point(next.Location.X + editPointOffset, next.Location.Y) : new Point(next.Location.X, next.Location.Y + editPointOffset);
next = new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation);
this.editPoints.InsertRange(activeEditPointIndex + 1, new EditPoint[] { next, new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, editPointLocation) });
}
if (this.activeEditPoint.Type == EditPoint.EditPointTypes.ConnectionEditPoint)
{
Fx.Assert(this.editPoints[0].Type == EditPoint.EditPointTypes.ConnectionEditPoint, "EditPoint type is wrong.");
Fx.Assert(this.editPoints[editPoints.Count - 1].Type == EditPoint.EditPointTypes.ConnectionEditPoint, "EditPoint type is wrong.");
this.activeEditPoint.Location = newPoint;
Fx.Assert(this.editPoints.Count > 0, "Some edit point should exist");
ConnectionPoint targetConnPt = null;
Point[] points = null;
Point begin = this.editPoints[0].Location;
Point end = this.editPoints[this.editPoints.Count - 1].Location;
if (typeof(ConnectionPointsAdorner).IsAssignableFrom(Mouse.DirectlyOver.GetType()))
{
ConnectionPointsAdorner connPtsAdorner = Mouse.DirectlyOver as ConnectionPointsAdorner;
targetConnPt = FreeFormPanel.ConnectionPointHitTest(newPoint, connPtsAdorner);
}
if (activeEditPointIndex == 0)
{
// We are dragging the source point of a connector.
ConnectionPoint destConnPt = FreeFormPanel.GetDestinationConnectionPoint(this.editedConnector);
if (targetConnPt != null)
{
points = ConnectorRouter.Route(parentPanel, targetConnPt, destConnPt);
this.activeEditPoint.Location = targetConnPt.Location;
}
else
{
points = ConnectorRouter.Route(parentPanel, begin, destConnPt);
}
}
else
{
// We are dragging the destination point of a connector.
ConnectionPoint srcConnPt = FreeFormPanel.GetSourceConnectionPoint(this.editedConnector);
if (targetConnPt != null)
{
points = ConnectorRouter.Route(parentPanel, srcConnPt, targetConnPt);
this.activeEditPoint.Location = targetConnPt.Location;
}
else
{
points = ConnectorRouter.Route(parentPanel, srcConnPt, end);
}
}
//When we start editing the end point we need to clear the slate and start over
List <EditPoint> newEditPoints = new List <EditPoint>();
if (points != null && points.Length > 1)
{
RemoveEditPoints(EditPoint.EditPointTypes.MultiSegmentEditPoint);
for (int i = 1; i < points.Length - 1; ++i)
{
newEditPoints.Add(new EditPoint(EditPoint.EditPointTypes.MultiSegmentEditPoint, points[i]));
}
this.editPoints.InsertRange(1, newEditPoints.ToArray());
}
}
else if (this.activeEditPoint.Type == EditPoint.EditPointTypes.MultiSegmentEditPoint)
{
if (previous != null && previous.Type != EditPoint.EditPointTypes.ConnectionEditPoint && next != null && next.Type != EditPoint.EditPointTypes.ConnectionEditPoint)
{
//Update the previous point
double slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(previous.Location, this.activeEditPoint.Location);
Orientation orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
previous.Location = (orientation == Orientation.Horizontal) ? new Point(previous.Location.X, newPoint.Y) : new Point(newPoint.X, previous.Location.Y);
//Update the next point
slopeOfLine = DesignerGeometryHelper.SlopeOfLineSegment(this.activeEditPoint.Location, next.Location);
orientation = (Math.Abs(slopeOfLine) < 1) ? Orientation.Horizontal : Orientation.Vertical;
next.Location = (orientation == Orientation.Horizontal) ? new Point(next.Location.X, newPoint.Y) : new Point(newPoint.X, next.Location.Y);
//Update the current point
this.activeEditPoint.Location = newPoint;
}
else
{
Fx.Assert(false, "Should not be here. UpdateEditPoints failed.");
}
}
}
// Remove all the redundant edit points
RemoveCoincidingEditPoints();
bool validEditPoints = ValidateEditPoints();
Fx.Assert(validEditPoints, "Validating EditPoints failed.");
}
