void BringToFront()
{
FreeFormPanel panel = StateContainerEditor.GetVisualAncestor <FreeFormPanel>(this);
// It is possible when BringToFront is executed, the state has already been deleted
if (panel != null)
{
panel.Children.Remove(this);
panel.Children.Add(this);
// Bring to front all attached connectors including those attached to child states
StateContainerEditor parent = StateContainerEditor.GetVisualAncestor <StateContainerEditor>(this);
if (parent != null)
{
FreeFormPanel outmostPanel = parent.GetOutmostStateContainerEditor().Panel;
HashSet <Connector> connectors = new HashSet <Connector>();
List <ModelItem> allStateModelItems = new List <ModelItem>();
allStateModelItems.Add(this.ModelItem);
allStateModelItems.AddRange(StateContainerEditor.GetAllChildStateModelItems(this.ModelItem));
foreach (ModelItem stateModelItem in allStateModelItems)
{
List <Connector> attachedConnectors = StateContainerEditor.GetAttachedConnectors((UIElement)stateModelItem.View);
foreach (Connector connector in attachedConnectors)
{
connectors.Add(connector);
}
}
foreach (Connector connector in connectors)
{
outmostPanel.Children.Remove(connector);
outmostPanel.Children.Add(connector);
}
}
}
}
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);
}
static ConnectionPoint ConnectionPointHitTest(UIElement element, Point hitPoint)
{
FreeFormPanel panel = VisualTreeUtils.FindVisualAncestor <FreeFormPanel>(element);
List <ConnectionPoint> connectionPoints = StateContainerEditor.GetConnectionPoints(element);
return(FreeFormPanel.ConnectionPointHitTest(hitPoint, connectionPoints, panel));
}
ConnectionPoint ConnectionPointHitTest(UIElement element, Point hitPoint)
{
List <ConnectionPoint> connectionPoints = new List <ConnectionPoint>();
List <ConnectionPoint> defaultConnectionPoints = FlowchartDesigner.GetConnectionPoints(element);
connectionPoints.InsertRange(0, defaultConnectionPoints);
connectionPoints.Add(FlowchartDesigner.GetTrueConnectionPoint(element));
connectionPoints.Add(FlowchartDesigner.GetFalseConnectionPoint(element));
return(FreeFormPanel.ConnectionPointHitTest(hitPoint, connectionPoints, this.panel));
}
void DeleteLinkVisual(Connector link)
{
ConnectionPoint srcConnectionPoint = FreeFormPanel.GetSourceConnectionPoint(link);
ConnectionPoint destConnectionPoint = FreeFormPanel.GetDestinationConnectionPoint(link);
//Update ConnectionPoints.
srcConnectionPoint.AttachedConnectors.Remove(link);
destConnectionPoint.AttachedConnectors.Remove(link);
this.panel.Children.Remove(link);
}
protected override void OnRender(DrawingContext drawingContext)
{
Point actualPoint;
Point origin = FreeFormPanel.GetLocation(AdornedElement);
Thickness margin = ((FrameworkElement)AdornedElement).Margin;
origin.X += margin.Left;
origin.Y += margin.Top;
foreach (ConnectionPoint connPoint in connectionPoints)
{
actualPoint = new Point(connPoint.Location.X - origin.X, connPoint.Location.Y - origin.Y);
this.DrawConnectionPoint(connPoint, actualPoint, drawingContext);
}
base.OnRender(drawingContext);
}
protected override void OnMouseMove(MouseEventArgs args)
{
base.OnMouseMove(args);
if (args != null && !this.Disabled)
{
if (args.LeftButton == MouseButtonState.Pressed && this.IsMouseCaptured)
{
StateContainerEditor stateContainerEditor = this.ParentStateContainerEditor;
FreeFormPanel panel = stateContainerEditor.Panel;
Grid stateContainerGrid = stateContainerEditor.stateContainerGrid;
Point currentPosition = Mouse.GetPosition(stateContainerGrid);
currentPosition.Offset(this.offset.X, this.offset.Y);
stateContainerEditor.StateContainerWidth = Math.Min(Math.Max(panel.RequiredWidth, currentPosition.X), stateContainerGrid.MaxWidth);
stateContainerEditor.StateContainerHeight = Math.Min(Math.Max(panel.RequiredHeight, currentPosition.Y), stateContainerGrid.MaxHeight);
}
}
}
static ConnectionPoint GetSrcConnectionPointForSharedTrigger(UIElement sourceDesigner, ModelItem connectorModelItem)
{
ConnectionPoint sourceConnectionPoint = null;
List <Connector> connectors = StateContainerEditor.GetOutgoingConnectors(sourceDesigner);
foreach (Connector connector in connectors)
{
ModelItem modelItem = StateContainerEditor.GetConnectorModelItem(connector);
if (modelItem != null && modelItem.ItemType == typeof(Transition))
{
if (modelItem.Properties[TransitionDesigner.TriggerPropertyName].Value == connectorModelItem.Properties[TransitionDesigner.TriggerPropertyName].Value)
{
sourceConnectionPoint = FreeFormPanel.GetSourceConnectionPoint(connector);
}
}
}
return(sourceConnectionPoint);
}
void CreateStartSymbol()
{
//Instantiate the start symbol
StartSymbol start = System.Activities.Core.Presentation.StartSymbol.CreateStartSymbol(this.Context);
start.Text = "Start";
this.flowStart = start.ModelItem;
DragDropHelper.SetCompositeView(start, this);
modelElement.Add(flowStart, start);
start.SizeChanged += new SizeChangedEventHandler(ChildSizeChanged);
this.StartSymbol = start;
PopulateConnectionPoints(this.StartSymbol, null);
this.StartSymbol.MouseEnter += new MouseEventHandler(ChildElement_MouseEnter);
this.StartSymbol.MouseLeave += new MouseEventHandler(ChildElement_MouseLeave);
//Getting the View state information.
object locationOfShape = this.ViewStateService.RetrieveViewState(this.ModelItem, shapeLocation);
object sizeOfShape = this.ViewStateService.RetrieveViewState(this.ModelItem, shapeSize);
if (locationOfShape != null)
{
Point locationPt = (Point)locationOfShape;
FreeFormPanel.SetLocation(this.StartSymbol, locationPt);
}
else
{
//Set the location of the start symbol.
this.StartSymbol.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
double startHeight = this.StartSymbol.DesiredSize.Height;
double startWidth = this.StartSymbol.DesiredSize.Width;
Point startPoint = new Point(panel.MinWidth / 2, startSymbolTopMargin + startHeight / 2);
Point startLocation = SnapVisualToGrid(this.StartSymbol, startPoint, new Point(-1, -1), false);
FreeFormPanel.SetLocation(this.StartSymbol, startLocation);
this.internalViewStateChange = true;
this.StoreShapeViewState(this.ModelItem, startLocation);
this.internalViewStateChange = false;
}
if (sizeOfShape != null)
{
FreeFormPanel.SetChildSize(this.StartSymbol, (Size)sizeOfShape);
}
}
static ConnectionPoint ConnectionPointHitTest(UIElement element, Point hitPoint)
{
ConnectionPoint hitConnectionPoint = null;
List <ConnectionPoint> connectionPoints = StateContainerEditor.GetConnectionPoints(element);
foreach (ConnectionPoint connPoint in connectionPoints)
{
if (connPoint != null)
{
// We need to transform the connection point location to be relative to the outmost panel
FreeFormPanel panel = GetVisualAncestor <FreeFormPanel>(element);
if (new Rect(panel.GetLocationRelativeToOutmostPanel(connPoint.Location) + connPoint.HitTestOffset, connPoint.HitTestSize).Contains(hitPoint))
{
hitConnectionPoint = connPoint;
break;
}
}
}
return(hitConnectionPoint);
}
protected override void OnMouseMove(MouseEventArgs args)
{
base.OnMouseMove(args);
if (!this.Disabled)
{
if (args.LeftButton == MouseButtonState.Pressed && this.IsMouseCaptured)
{
FlowchartDesigner flowchartDesigner = this.ParentFlowchartDesigner;
FreeFormPanel panel = flowchartDesigner.panel;
Grid flowchartGrid = this.ParentGrid;
Point currentPosition = Mouse.GetPosition(flowchartGrid);
currentPosition.Offset(this.offset.X, this.offset.Y);
flowchartDesigner.FlowchartWidth = Math.Min(Math.Max(panel.RequiredWidth, currentPosition.X), flowchartGrid.MaxWidth);
flowchartDesigner.FlowchartHeight = Math.Min(Math.Max(panel.RequiredHeight, currentPosition.Y), flowchartGrid.MaxHeight);
args.Handled = 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);
}
private static List <ConnectionPoint> FindCandidatePointsForLink(List <ConnectionPoint> destConnPoints, ConnectionPointKind excludePointType)
{
List <ConnectionPoint> candidateDestConnPoints;
IEnumerable <ConnectionPoint> freeDestConnPoints = destConnPoints.Where(p =>
p.PointType != excludePointType &&
!p.AttachedConnectors.Any());
if (freeDestConnPoints.Any())
{
candidateDestConnPoints = freeDestConnPoints.ToList();
}
else
{
IEnumerable <ConnectionPoint> availablePoints =
destConnPoints.Where(
p => p.PointType != excludePointType &&
p.AttachedConnectors.Any(connector => FreeFormPanel.GetDestinationConnectionPoint(connector).Equals(p)));
candidateDestConnPoints = availablePoints.Any() ? availablePoints.ToList() : destConnPoints;
}
return(candidateDestConnPoints);
}
void OnViewStateChanged(object sender, ViewStateChangedEventArgs e)
{
Debug.Assert(e.ParentModelItem != null, "ViewState should be associated with some modelItem");
if (!this.internalViewStateChange)
{
if (e.ParentModelItem == this.ModelItem)
{
if (string.Equals(e.Key, StateContainerWidthViewStateKey, StringComparison.Ordinal))
{
double defaultWidth = ((this.ModelItem.ItemType == typeof(State)) ? DefaultStateWidth : DefaultStateMachineWidth);
object widthViewState = this.ViewStateService.RetrieveViewState(this.ModelItem, StateContainerWidthViewStateKey);
this.StateContainerWidth = (widthViewState != null) ? (double)widthViewState : defaultWidth;
}
else if (string.Equals(e.Key, StateContainerHeightViewStateKey, StringComparison.Ordinal))
{
double defaultHeight = ((this.ModelItem.ItemType == typeof(State)) ? DefaultStateHeight : DefaultStateMachineHeight);
object heightViewState = this.ViewStateService.RetrieveViewState(this.ModelItem, StateContainerHeightViewStateKey);
this.StateContainerHeight = (heightViewState != null) ? (double)heightViewState : defaultHeight;
}
}
if (e.ParentModelItem.ItemType == typeof(State) && e.Key.Equals(ShapeLocationViewStateKey))
{
if (this.modelItemToUIElement.ContainsKey(e.ParentModelItem))
{
if (e.NewValue != null)
{
FreeFormPanel.SetLocation(this.modelItemToUIElement[e.ParentModelItem], (Point)e.NewValue);
this.panel.InvalidateMeasure();
if (e.OldValue != null)
{
this.shapeLocations.Remove((Point)e.OldValue);
}
this.shapeLocations.Add((Point)e.NewValue);
// To reroute the links
this.InvalidateMeasureForOutmostPanel();
}
}
}
else if (e.ParentModelItem.ItemType == typeof(State) && e.Key.Equals(ShapeSizeViewStateKey))
{
// To reroute the links
this.InvalidateMeasureForOutmostPanel();
}
// Only the outmost editor should respond to connector changes because all connectors are
// only added to the outmost editor
else if (e.Key.Equals(ConnectorLocationViewStateKey) && this.IsOutmostStateContainerEditor())
{
Connector changedConnector = this.GetConnectorOnOutmostEditor(e.ParentModelItem);
if (changedConnector != null)
{
if (e.NewValue != null)
{
Debug.Assert(e.NewValue is PointCollection, "e.NewValue is not PointCollection");
changedConnector.Points = e.NewValue as PointCollection;
this.panel.RemoveConnectorEditor();
this.InvalidateMeasureForOutmostPanel();
if (IsConnectorFromInitialNode(changedConnector))
{
this.initialStateChanged = true;
}
}
}
}
}
}
internal Connector GetLinkOnCanvas(ModelItem srcFlowElementModelItem, ModelItem destflowElementModelItem, string propertyName)
{
Connector linkOnCanvas = null;
ModelItem shapeModelItem = null;
List <Connector> outGoingConnectors = null;
if (!srcFlowElementModelItem.Equals(this.ModelItem))
{
shapeModelItem = this.GetCorrespondingElementOnCanvas(srcFlowElementModelItem);
outGoingConnectors = GetOutGoingConnectors(this.modelElement[shapeModelItem]);
}
else // Must be startNode
{
outGoingConnectors = GetOutGoingConnectors(this.StartSymbol);
}
foreach (Connector connector in outGoingConnectors)
{
ModelItem connectorDestModelItem = ((VirtualizedContainerService.VirtualizingContainer)FreeFormPanel.GetDestinationConnectionPoint(connector).ParentDesigner).ModelItem;
ModelItem connectorDestFlowElementMI = this.GetFlowElementMI(connectorDestModelItem);
//Following condition checks if the destination for current connector is equal to the destination passed in.
if (destflowElementModelItem != null && destflowElementModelItem.Equals(connectorDestFlowElementMI))
{
if (GenericFlowSwitchHelper.IsGenericFlowSwitch(srcFlowElementModelItem.ItemType))
{
ModelItem linkModelItem = FlowchartDesigner.GetLinkModelItem(connector);
if (linkModelItem.Properties["IsDefaultCase"].Value.GetCurrentValue().Equals(true) && propertyName.Equals("Default"))
{
linkOnCanvas = connector;
break;
}
else
{
ModelItem connectorCaseMI = linkModelItem.Properties["Case"].Value;
if (linkModelItem.Properties["IsDefaultCase"].Value.GetCurrentValue().Equals(false))
{
string caseName = connectorCaseMI == null ? null : GenericFlowSwitchHelper.GetString(connectorCaseMI.GetCurrentValue(), connectorCaseMI.ItemType);
if (connectorCaseMI != null && caseName.Equals(propertyName.Substring(GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier.Length)))
{
linkOnCanvas = connector;
break;
}
else if (connectorCaseMI == null)
{
if (GenericFlowSwitchHelper.FlowSwitchNullCaseKeyIdentifier.Equals(propertyName.Substring(GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier.Length)))
{
linkOnCanvas = connector;
break;
}
}
}
}
}
else if (typeof(FlowDecision).IsAssignableFrom(srcFlowElementModelItem.ItemType))
{
ConnectionPoint trueConnPoint = FlowchartDesigner.GetTrueConnectionPoint(this.modelElement[shapeModelItem]);
ConnectionPoint falseConnPoint = FlowchartDesigner.GetFalseConnectionPoint(this.modelElement[shapeModelItem]);
ConnectionPoint connectorSrcConnPoint = FreeFormPanel.GetSourceConnectionPoint(connector);
if ((propertyName.Equals("True") && connectorSrcConnPoint.Equals(trueConnPoint)) ||
(propertyName.Equals("False") && connectorSrcConnPoint.Equals(falseConnPoint)))
{
linkOnCanvas = connector;
break;
}
}
else //FlowStep case.
{
linkOnCanvas = connector;
break;
}
}
}
return(linkOnCanvas);
}
void OnViewStateChanged(object sender, ViewStateChangedEventArgs e)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
Fx.Assert(e.ParentModelItem != null, "ViewState should be associated with some modelItem");
Connector changedConnector = null;
if (e.ParentModelItem == this.ModelItem)
{
if (string.Equals(e.Key, FlowchartSizeFeature.WidthPropertyName, StringComparison.Ordinal))
{
this.FlowchartWidth = (double)TypeDescriptor.GetProperties(this.ModelItem)[FlowchartSizeFeature.WidthPropertyName].GetValue(this.ModelItem);
}
else if (string.Equals(e.Key, FlowchartSizeFeature.HeightPropertyName, StringComparison.Ordinal))
{
this.FlowchartHeight = (double)TypeDescriptor.GetProperties(this.ModelItem)[FlowchartSizeFeature.HeightPropertyName].GetValue(this.ModelItem);
}
}
if ((IsFlowNode(e.ParentModelItem) || this.ModelItem.Equals(e.ParentModelItem)) && !this.internalViewStateChange)
{
ModelItem itemOnCanvas = this.GetCorrespondingElementOnCanvas(e.ParentModelItem);
if (this.modelElement.ContainsKey(itemOnCanvas))
{
if (e.Key.Equals(shapeLocation))
{
if (e.NewValue != null)
{
FreeFormPanel.SetLocation(this.modelElement[itemOnCanvas], (Point)e.NewValue);
this.panel.InvalidateMeasure();
if (e.OldValue != null)
{
this.shapeLocations.Remove((Point)e.OldValue);
}
this.shapeLocations.Add((Point)e.NewValue);
}
}
else
{
if (this.ModelItem.Equals(e.ParentModelItem) &&
e.Key.Equals(ConnectorViewStateKey))
{
changedConnector = this.GetLinkOnCanvas(e.ParentModelItem, e.ParentModelItem.Properties["StartNode"].Value, "StartNode");
}
else if (typeof(FlowStep).IsAssignableFrom(e.ParentModelItem.ItemType) &&
e.Key.Equals(ConnectorViewStateKey))
{
changedConnector = this.GetLinkOnCanvas(e.ParentModelItem, e.ParentModelItem.Properties["Next"].Value, "Next");
}
else if (typeof(FlowDecision).IsAssignableFrom(e.ParentModelItem.ItemType))
{
if (e.Key.Equals(TrueConnectorViewStateKey))
{
changedConnector = this.GetLinkOnCanvas(e.ParentModelItem, e.ParentModelItem.Properties["True"].Value, "True");
}
else if (e.Key.Equals(FalseConnectorViewStateKey))
{
changedConnector = this.GetLinkOnCanvas(e.ParentModelItem, e.ParentModelItem.Properties["False"].Value, "False");
}
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(e.ParentModelItem.ItemType))
{
if (e.Key.Equals(FlowchartDesigner.FlowSwitchDefaultViewStateKey, StringComparison.CurrentCulture))
{
changedConnector = this.GetLinkOnCanvas(e.ParentModelItem, e.ParentModelItem.Properties["Default"].Value, e.Key);
}
else if (e.Key.EndsWith(CaseViewStateKeyAppendString, StringComparison.CurrentCulture))
{
string switchCaseName = e.Key.Substring(0, e.Key.Length - CaseViewStateKeyAppendString.Length);
object switchCase = switchCaseName;
Type genericType = e.ParentModelItem.ItemType.GetGenericArguments()[0];
switchCase = GenericFlowSwitchHelper.GetObject(switchCaseName, genericType);
if (GenericFlowSwitchHelper.ContainsCaseKey(e.ParentModelItem.Properties["Cases"], switchCase))
{
//Prepending with GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier to differentiate between the property Default and the key Default.
changedConnector = this.GetLinkOnCanvas(e.ParentModelItem, GenericFlowSwitchHelper.GetCaseModelItem(e.ParentModelItem.Properties["Cases"], switchCase), GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier + switchCase);
}
}
}
}
}
}
if (changedConnector != null)
{
if (e.NewValue != null)
{
Fx.Assert(e.NewValue is PointCollection, "e.NewValue is not PointCollection");
changedConnector.Points = e.NewValue as PointCollection;
this.panel.RemoveConnectorEditor();
this.panel.InvalidateMeasure();
}
}
}
private IFlowSwitchLink DeleteLinkImpl(Connector link, bool isMoveOrAutoSplit = false,
HashSet <ModelItem> referenceUpdatedModelItems = null)
{
IFlowSwitchLink caseKey = null;
ModelItem linkModelItem = FlowchartDesigner.GetLinkModelItem(link);
if (referenceUpdatedModelItems != null &&
referenceUpdatedModelItems.Contains(linkModelItem))
{
return(caseKey);
}
ConnectionPoint srcConnectionPoint = FreeFormPanel.GetSourceConnectionPoint(link);
ConnectionPoint destConnectionPoint = FreeFormPanel.GetDestinationConnectionPoint(link);
if (typeof(FlowStep).IsAssignableFrom(linkModelItem.ItemType))
{
linkModelItem.Properties["Next"].SetValue(null);
}
else if (typeof(FlowDecision).IsAssignableFrom(linkModelItem.ItemType))
{
//Determine if it is True or False branch.
if (srcConnectionPoint.Equals(FlowchartDesigner.GetTrueConnectionPoint(srcConnectionPoint.ParentDesigner)))
{
//True branch
linkModelItem.Properties["True"].SetValue(null);
}
else
{
linkModelItem.Properties["False"].SetValue(null);
}
}
else if (typeof(IFlowSwitchLink).IsAssignableFrom(linkModelItem.ItemType))
{
IFlowSwitchLink flowSwitchLink = (IFlowSwitchLink)linkModelItem.GetCurrentValue();
caseKey = flowSwitchLink;
//Transitioning from the fakeModelItem world to the real ModelItem world.
FlowNode fs = flowSwitchLink.ParentFlowSwitch;
ModelItem realFlowSwitchMI = (this.ModelItem as IModelTreeItem).ModelTreeManager.WrapAsModelItem(fs);
if (referenceUpdatedModelItems != null &&
referenceUpdatedModelItems.Contains(realFlowSwitchMI))
{
return(caseKey);
}
if (flowSwitchLink.IsDefaultCase)
{
realFlowSwitchMI.Properties["Default"].SetValue(null);
if (!isMoveOrAutoSplit)
{
realFlowSwitchMI.Properties[FlowSwitchLabelFeature.DefaultCaseDisplayNamePropertyName].SetValue(FlowSwitchLabelFeature.DefaultCaseDisplayNameDefaultValue);
}
}
else
{
GenericFlowSwitchHelper.RemoveCase(realFlowSwitchMI.Properties["Cases"], flowSwitchLink.CaseObject);
}
}
else // StartNode
{
this.ModelItem.Properties["StartNode"].SetValue(null);
}
this.StoreConnectorViewState(linkModelItem, null, srcConnectionPoint, true);
return(caseKey);
}
List <Connector> GetOutGoingConnectors(UIElement shape)
{
List <Connector> outGoingConnectors = new List <Connector>();
List <ConnectionPoint> allConnectionPoints = GetAllConnectionPoints(shape);
foreach (ConnectionPoint connPoint in allConnectionPoints)
{
if (connPoint != null)
{
outGoingConnectors.AddRange(connPoint.AttachedConnectors.Where(p => FreeFormPanel.GetSourceConnectionPoint(p).Equals(connPoint)));
}
}
return(outGoingConnectors);
}
static List <Connector> GetIncomingConnectors(UIElement shape)
{
List <Connector> incomingConnectors = new List <Connector>();
List <ConnectionPoint> allConnectionPoints = GetConnectionPoints(shape);
foreach (ConnectionPoint connPoint in allConnectionPoints)
{
if (connPoint != null)
{
incomingConnectors.AddRange(connPoint.AttachedConnectors.Where(p => FreeFormPanel.GetDestinationConnectionPoint(p).Equals(connPoint)));
}
}
return(incomingConnectors);
}
protected override void OnRender(DrawingContext drawingContext)
{
const int textCulture = 9;
ConnectionPoint trueConnectionPoint = null;
ConnectionPoint falseConnectionPoint = null;
if (this.connectionPoints.Contains(FlowchartDesigner.GetTrueConnectionPoint(this.AdornedElement)))
{
trueConnectionPoint = FlowchartDesigner.GetTrueConnectionPoint(this.AdornedElement);
}
if (this.connectionPoints.Contains(FlowchartDesigner.GetFalseConnectionPoint(this.AdornedElement)))
{
falseConnectionPoint = FlowchartDesigner.GetFalseConnectionPoint(this.AdornedElement);
}
Point actualPoint;
Point origin = FreeFormPanel.GetLocation(AdornedElement);
Thickness margin = ((FrameworkElement)AdornedElement).Margin;
origin.X += margin.Left;
origin.Y += margin.Top;
foreach (ConnectionPoint connPoint in this.connectionPoints)
{
actualPoint = new Point(connPoint.Location.X - origin.X, connPoint.Location.Y - origin.Y);
this.DrawConnectionPoint(connPoint, actualPoint, drawingContext);
}
if (trueConnectionPoint != null)
{
string trueLabelText = String.Empty;
VirtualizedContainerService.VirtualizingContainer virtualizingContainer = (VirtualizedContainerService.VirtualizingContainer)trueConnectionPoint.ParentDesigner;
if (virtualizingContainer != null && virtualizingContainer.ModelItem != null)
{
trueLabelText = (string)virtualizingContainer.ModelItem.Properties["TrueLabel"].ComputedValue;
}
actualPoint = new Point(trueConnectionPoint.Location.X - origin.X, trueConnectionPoint.Location.Y - origin.Y);
FormattedText trueMarkerFormattedText = new FormattedText(trueLabelText, new System.Globalization.CultureInfo(textCulture),
this.FlowDirection, FlowchartDesigner.FlowElementCaptionTypeface, FlowchartDesigner.FlowNodeCaptionFontSize,
new SolidColorBrush(WorkflowDesignerColors.WorkflowViewElementCaptionColor));
actualPoint.Y += ConnectionPoint.DrawingLargeSide / 2;
actualPoint.X -= trueMarkerFormattedText.WidthIncludingTrailingWhitespace;
DrawtWithTransform(
drawingContext,
this.isTextRightToLeft,
// Mirror the left side text to the right side by using this axis when RTL.
actualPoint.X,
() =>
{
drawingContext.DrawText(trueMarkerFormattedText, actualPoint);
});
}
if (falseConnectionPoint != null)
{
string falseLabelText = String.Empty;
VirtualizedContainerService.VirtualizingContainer virtualizingContainer = (VirtualizedContainerService.VirtualizingContainer)falseConnectionPoint.ParentDesigner;
if (virtualizingContainer != null && virtualizingContainer.ModelItem != null)
{
falseLabelText = (string)virtualizingContainer.ModelItem.Properties["FalseLabel"].ComputedValue;
}
actualPoint = new Point(falseConnectionPoint.Location.X - origin.X, falseConnectionPoint.Location.Y - origin.Y);
actualPoint.Y += ConnectionPoint.DrawingLargeSide / 2;
FormattedText falseMarkerFormattedText = new FormattedText(falseLabelText, new System.Globalization.CultureInfo(textCulture),
this.FlowDirection, FlowchartDesigner.FlowElementCaptionTypeface, FlowchartDesigner.FlowNodeCaptionFontSize,
new SolidColorBrush(WorkflowDesignerColors.WorkflowViewElementCaptionColor));
DrawtWithTransform(
drawingContext,
this.isTextRightToLeft,
// Mirror the left side text to the right side by using this axis when RTL.
actualPoint.X,
() =>
{
drawingContext.DrawText(falseMarkerFormattedText, actualPoint);
});
}
base.OnRender(drawingContext);
}
//For flowchart reacting to ModelItem changes we are concerned of the following scenarios:
//1. FlowElements being deleted from the Flowchart.Nodes collection or Flowswitch cases being deleted from ItemsCollection
//2. FlowElements being added to the Flowchart.Nodes collection or Flowswitch cases being added from ItemsCollection
//3. Properties being changed in FlowStep(Next), FlowDecision(True, false), FlowSwitch(Default) (Any of the flowelemnet should be present in the elements collection).
//4. Flowswitch cases being added/remove via Cases.Dicitionary
void ModelTreeManager_EditingScopeCompleted(object sender, EditingScopeEventArgs e)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
foreach (Change change in e.EditingScope.Changes)
{
//Case 1, 2.
if (change is CollectionChange)
{
CollectionChange collectionChange = change as CollectionChange;
if (collectionChange.Collection.Equals(this.ModelItem.Properties["Nodes"].Collection))
{
if (collectionChange.Operation == CollectionChange.OperationType.Delete)
{
this.DeleteShapeVisual(this.flowNodeToUIElement[collectionChange.Item]);
}
else
{
this.AddFlowElementsToDesigner(new List <ModelItem> {
collectionChange.Item
});
//An editing scope change references the ModelItem.
//Hence in case of multiple changes to the same modelItem within the same EditingScope, we will see all the changes on the ModelItem for each change.
//Eg. Suppose following two changes are in the same editing scope: 1. Add ModelItem item1 to Collection, 2. Change a property on this MI, item1.Prop1
//In this case, EditingScope.Changes.Count will be 2.
//Since an EditingScope change keeps a reference to the ModelItem changed, when we process the first change, the second change would already be reflected on the ModelItem.
//Hence, while processing CollectionChange for item1, item1.Prop1 will already reflect the new value.
//Also there will be another change notifying the change in item1.Prop1.
//AddFlowElementsToDesigner() method, walks through the properties of a newly added item and creates any links if required.
//This is necessary for Paste scenario where we want to create links between Items added to the Nodes Collection.
//Because of this behavior of AddFlowElementsToDesigner(), before reacting to a property change for adding a link, we will always verify that the link does not already exists.
}
}
if (collectionChange.Collection.Parent != null && collectionChange.Collection.Parent.Parent != null &&
this.ModelItem.Properties["Nodes"].Collection.Contains(collectionChange.Collection.Parent.Parent) &&
collectionChange.Collection.Parent.Parent.ItemType.IsGenericType &&
collectionChange.Collection.Parent.Parent.ItemType.GetGenericTypeDefinition() == typeof(FlowSwitch <>))
{
ModelItem item = collectionChange.Item;
string caseName = GenericFlowSwitchHelper.GetString(item.Properties["Key"].ComputedValue, item.Properties["Key"].PropertyType);
Connector connector = this.GetLinkOnCanvas(collectionChange.Collection.Parent.Parent,
item.Properties["Value"].Value, GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier + caseName);
if (collectionChange.Operation == CollectionChange.OperationType.Delete)
{
if (connector != null)
{
this.DeleteLinkVisual(connector);
}
}
else if (collectionChange.Operation == CollectionChange.OperationType.Insert)
{
if (connector == null)
{
//Prepending GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier to differentiate between the FlowSwitch's Property Default and key Default.
connector = this.CreatePropertyLink(collectionChange.Collection.Parent.Parent,
item.Properties["Value"].Value,
GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier + caseName);
Fx.Assert(connector != null, "Link not created");
this.panel.Children.Add(connector);
}
else
{
RefreshFlowSwitchLinkModelItem(/* flowSwitchModelItem = */ collectionChange.Collection.Parent.Parent, connector, false);
}
}
}
}
else if (change is DictionaryChange)
{
// case 4
DictionaryChange dictionaryChange = change as DictionaryChange;
if (dictionaryChange.Dictionary.Parent != null &&
this.ModelItem.Properties["Nodes"].Collection.Contains(dictionaryChange.Dictionary.Parent) &&
dictionaryChange.Dictionary.Parent.ItemType.IsGenericType &&
dictionaryChange.Dictionary.Parent.ItemType.GetGenericTypeDefinition() == typeof(FlowSwitch <>))
{
ModelItem flowSwitchModelItem = dictionaryChange.Dictionary.Parent;
ModelItem caseTargetModelItem = dictionaryChange.Value;
string caseName = GenericFlowSwitchHelper.GetString(dictionaryChange.Key == null ? null : dictionaryChange.Key.GetCurrentValue(), dictionaryChange.Key == null ? null : dictionaryChange.Key.ItemType);
string caseNameInModelItem = GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier + caseName;
Connector connector = this.GetLinkOnCanvas(
flowSwitchModelItem,
caseTargetModelItem,
caseNameInModelItem);
if (dictionaryChange.Operation == DictionaryChange.OperationType.Delete)
{
if (connector != null)
{
this.DeleteLinkVisual(connector);
}
}
else if (dictionaryChange.Operation == DictionaryChange.OperationType.Insert)
{
if (connector == null)
{
connector = this.CreatePropertyLink(
flowSwitchModelItem,
caseTargetModelItem,
caseNameInModelItem);
this.panel.Children.Add(connector);
}
}
}
}
//Case 3.
else if (change is PropertyChange)
{
PropertyChange propertyChange = change as PropertyChange;
if (this.ModelItem.Properties["Nodes"].Collection.Contains(propertyChange.Owner) ||
(propertyChange.PropertyName == "StartNode" && propertyChange.Owner == this.ModelItem))
{
if (propertyChange.OldValue != null &&
IsFlowNode(propertyChange.OldValue))
{
Connector link = GetLinkOnCanvas(propertyChange.Owner, propertyChange.OldValue, propertyChange.PropertyName);
//Debug.Assert(link != null, "Link not found on designer");
if (link != null)
{
this.DeleteLinkVisual(link);
}
}
if (propertyChange.NewValue != null &&
IsFlowNode(propertyChange.NewValue))
{
Connector oldLink = GetLinkOnCanvas(propertyChange.Owner, propertyChange.NewValue, propertyChange.PropertyName);
//If this connector has already been added don't add again.
if (oldLink == null)
{
Connector link = CreatePropertyLink(propertyChange.Owner, propertyChange.NewValue, propertyChange.PropertyName);
Fx.Assert(link != null, "Link not created");
this.panel.Children.Add(link);
}
else
{
if (GenericFlowSwitchHelper.IsGenericFlowSwitch(propertyChange.Owner.ItemType))
{
this.RefreshFlowSwitchLinkModelItem(/* flowSwitchModelItem = */ propertyChange.Owner, oldLink, true);
}
}
}
//handling for the case where the FlowStep.Action changes:
//Explicitly adding a check for FlowStep, because other FlowNodes have properties of type Activity, which we don't want to react to.
//AddFlowElementsToDesigner() will add the links originating out of the shape that is changing.
//We have to take care of refreshing the links coming into the shape that is changing.
if (typeof(FlowStep).IsAssignableFrom(propertyChange.Owner.ItemType))
{
List <Connector> oldIncomingConnectors = new List <Connector>();
if (propertyChange.OldValue != null && IsFlowStepAction(propertyChange.OldValue))
{
UIElement oldShape = this.flowNodeToUIElement[propertyChange.Owner];
oldIncomingConnectors = this.GetInComingConnectors(oldShape);
this.DeleteShapeVisual(oldShape);
}
if (propertyChange.NewValue != null && IsFlowStepAction(propertyChange.NewValue))
{
this.AddFlowElementsToDesigner(new List <ModelItem> {
propertyChange.Owner
});
foreach (Connector oldConnector in oldIncomingConnectors)
{
Connector newConnector = CreateLink(FreeFormPanel.GetSourceConnectionPoint(oldConnector),
this.flowNodeToUIElement[propertyChange.Owner], FlowchartDesigner.GetLinkModelItem(oldConnector));
this.panel.Children.Add(newConnector);
}
}
}
}
}
}
}