bool CreateFlowSwitchLink(ConnectionPoint sourceConnPoint, ModelItem srcFlowElementMI, ModelItem destFlowElementMI, IFlowSwitchLink caseKey, PointCollection connectorViewState, ref string errorMessage)
{
IModelTreeItem modelTreeItem = this.ModelItem as IModelTreeItem;
if ((caseKey != null && caseKey.IsDefaultCase) || (caseKey == null && srcFlowElementMI.Properties["Default"].Value == null))
{
IFlowSwitchLink link = GenericFlowSwitchHelper.CreateFlowSwitchLink(srcFlowElementMI.ItemType, srcFlowElementMI, null, true);
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
if (connectorViewState != null)
{
this.StoreConnectorViewState(linkModelItem, connectorViewState, sourceConnPoint);
}
srcFlowElementMI.Properties["Default"].SetValue(destFlowElementMI);
}
else
{
ModelProperty casesProp = srcFlowElementMI.Properties["Cases"];
string uniqueCaseName = null;
if (caseKey == null)
{
Type typeArgument = srcFlowElementMI.ItemType.GetGenericArguments()[0];
if (GenericFlowSwitchHelper.CanBeGeneratedUniquely(typeArgument))
{
uniqueCaseName = GenericFlowSwitchHelper.GetCaseName(casesProp, typeArgument, out errorMessage);
}
else
{
FlowSwitchCaseEditorDialog editor = new FlowSwitchCaseEditorDialog(srcFlowElementMI, this.Context, this, SR.AddNewCase, typeArgument);
editor.WindowSizeToContent = SizeToContent.WidthAndHeight;
if (!editor.ShowOkCancel())
{
return(false);
}
uniqueCaseName = editor.CaseName;
}
}
else
{
uniqueCaseName = caseKey.CaseName;
}
if (string.IsNullOrEmpty(errorMessage))
{
IFlowSwitchLink link = GenericFlowSwitchHelper.CreateFlowSwitchLink(srcFlowElementMI.ItemType, srcFlowElementMI, uniqueCaseName, false);
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
if (connectorViewState != null)
{
this.StoreConnectorViewState(linkModelItem, connectorViewState, sourceConnPoint);
}
GenericFlowSwitchHelper.AddCase(srcFlowElementMI.Properties["Cases"], link.CaseObject, destFlowElementMI.GetCurrentValue());
}
}
return(true);
}
// 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);
}
void RefreshFlowSwitchLinkModelItem(ModelItem flowSwitchModelItem, Connector connector, bool isDefault)
{
ModelItem oldLinkModelItem = FlowchartDesigner.GetLinkModelItem(connector);
IModelTreeItem modelTreeItem = flowSwitchModelItem as IModelTreeItem;
IFlowSwitchLink link = GenericFlowSwitchHelper.CreateFlowSwitchLink(flowSwitchModelItem.ItemType, flowSwitchModelItem, ((IFlowSwitchLink)oldLinkModelItem.GetCurrentValue()).CaseObject, isDefault);
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
FlowchartDesigner.SetLinkModelItem(connector, linkModelItem);
connector.SetBinding(Connector.LabelTextProperty, link.CreateConnectorLabelTextBinding());
Selection currentSelection = this.Context.Items.GetValue <Selection>();
if (currentSelection.SelectedObjects.Contains(oldLinkModelItem))
{
Selection.Toggle(this.Context, oldLinkModelItem);
Selection.Select(this.Context, linkModelItem);
}
}
internal bool CreateLinkGesture(ConnectionPoint sourceConnectionPoint, UIElement dest, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
bool linkCreated = false;
ConnectionPoint destConnectionPoint = ClosestDestConnectionPoint(sourceConnectionPoint, dest, out errorMessage);
if (destConnectionPoint != null)
{
linkCreated = CreateLinkGesture(sourceConnectionPoint, destConnectionPoint, out errorMessage, isLinkValidDueToLinkMove, caseKey);
}
return linkCreated;
}
internal bool CreateLinkGesture(ConnectionPoint sourceConnectionPoint, ConnectionPoint destConnectionPoint, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
Fx.Assert(sourceConnectionPoint != null, "sourceConnectionPoint is null.");
Fx.Assert(destConnectionPoint != null, "destConnectionPoint is null.");
bool linkCreated = false;
errorMessage = string.Empty;
if (destConnectionPoint.PointType != ConnectionPointKind.Outgoing && sourceConnectionPoint.PointType != ConnectionPointKind.Incoming)
{
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(SR.FCCreateLink))
{
linkCreated = UpdateFlowChartObject(sourceConnectionPoint, destConnectionPoint, out errorMessage, isLinkValidDueToLinkMove, caseKey);
try
{
es.Complete();
}
catch (ArgumentException)
{
errorMessage = SR.InvalidFlowSwitchCaseMessage;
linkCreated = false;
}
}
}
else
{
errorMessage = SR.FCInvalidLink;
}
return linkCreated;
}
//Interfaces for users to create links on the flowchart.
internal bool CreateLinkGesture(ConnectionPoint sourceConnectionPoint, ConnectionPoint destConnectionPoint, out string errorMessage, IFlowSwitchLink caseKey)
{
return CreateLinkGesture(sourceConnectionPoint, destConnectionPoint, out errorMessage, false, caseKey);
}
bool CreateFlowSwitchLink(ConnectionPoint sourceConnPoint, ModelItem srcFlowElementMI, ModelItem destFlowElementMI, IFlowSwitchLink caseKey, PointCollection connectorViewState, ref string errorMessage)
{
IModelTreeItem modelTreeItem = this.ModelItem as IModelTreeItem;
if ((caseKey != null && caseKey.IsDefaultCase) || (caseKey == null && srcFlowElementMI.Properties["Default"].Value == null))
{
IFlowSwitchLink link = GenericFlowSwitchHelper.CreateFlowSwitchLink(srcFlowElementMI.ItemType, srcFlowElementMI, null, true);
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
if (connectorViewState != null)
{
this.StoreConnectorViewState(linkModelItem, connectorViewState, sourceConnPoint);
}
srcFlowElementMI.Properties["Default"].SetValue(destFlowElementMI);
}
else
{
ModelProperty casesProp = srcFlowElementMI.Properties["Cases"];
string uniqueCaseName = null;
if (caseKey == null)
{
Type typeArgument = srcFlowElementMI.ItemType.GetGenericArguments()[0];
if (GenericFlowSwitchHelper.CanBeGeneratedUniquely(typeArgument))
{
uniqueCaseName = GenericFlowSwitchHelper.GetCaseName(casesProp, typeArgument, out errorMessage);
}
else
{
FlowSwitchCaseEditorDialog editor = new FlowSwitchCaseEditorDialog(srcFlowElementMI, this.Context, this, SR.AddNewCase, typeArgument);
editor.WindowSizeToContent = SizeToContent.WidthAndHeight;
if (!editor.ShowOkCancel())
{
return false;
}
uniqueCaseName = editor.CaseName;
}
}
else
{
uniqueCaseName = caseKey.CaseName;
}
if (string.IsNullOrEmpty(errorMessage))
{
IFlowSwitchLink link = GenericFlowSwitchHelper.CreateFlowSwitchLink(srcFlowElementMI.ItemType, srcFlowElementMI, uniqueCaseName, false);
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
if (connectorViewState != null)
{
this.StoreConnectorViewState(linkModelItem, connectorViewState, sourceConnPoint);
}
GenericFlowSwitchHelper.AddCase(srcFlowElementMI.Properties["Cases"], link.CaseObject, destFlowElementMI.GetCurrentValue());
}
}
return true;
}
bool UpdateFlowChartObject(ConnectionPoint sourceConnPoint, ConnectionPoint destConnPoint, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
//srcDesigner will be null for the case where source designer is StartSymbol.
VirtualizedContainerService.VirtualizingContainer srcDesigner = sourceConnPoint.ParentDesigner as VirtualizedContainerService.VirtualizingContainer;
VirtualizedContainerService.VirtualizingContainer destDesigner = destConnPoint.ParentDesigner as VirtualizedContainerService.VirtualizingContainer;
ModelItem linkSource;
ModelItem linkDest = destDesigner.ModelItem;
ModelItem destFlowElementMI = GetFlowElementMI(linkDest);
PointCollection connectorViewState = new PointCollection(ConnectorRouter.Route(this.panel, sourceConnPoint, destConnPoint));
errorMessage = string.Empty;
if (sourceConnPoint.ParentDesigner is StartSymbol)
{
linkSource = this.ModelItem;
if (linkSource.Properties["StartNode"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(linkSource, connectorViewState, sourceConnPoint);
linkSource.Properties["StartNode"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCNextLinkDefined;
}
}
else
{
linkSource = srcDesigner.ModelItem;
ModelItem srcFlowElementMI = GetFlowElementMI(linkSource);
if (typeof(FlowStep).IsAssignableFrom(srcFlowElementMI.ItemType))
{
if (srcFlowElementMI.Properties["Next"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(srcFlowElementMI, connectorViewState, sourceConnPoint);
srcFlowElementMI.Properties["Next"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCNextLinkDefined;
}
}
else if (typeof(FlowDecision).IsAssignableFrom(srcFlowElementMI.ItemType))
{
if (sourceConnPoint.Equals(FlowchartDesigner.GetTrueConnectionPoint(this.modelElement[linkSource])))
{
if (linkSource.Properties["True"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(srcFlowElementMI, connectorViewState, sourceConnPoint);
linkSource.Properties["True"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCTrueBranchExists;
}
}
else if (sourceConnPoint.Equals(FlowchartDesigner.GetFalseConnectionPoint(this.modelElement[linkSource])))
{
if (linkSource.Properties["False"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(srcFlowElementMI, connectorViewState, sourceConnPoint);
linkSource.Properties["False"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCFalseBranchExists;
}
}
else
{
errorMessage = SR.FCFlowConditionLinkError;
}
}
else //FlowSwitch
{
if (!CreateFlowSwitchLink(sourceConnPoint, srcFlowElementMI, destFlowElementMI, caseKey, connectorViewState, ref errorMessage))
{
return false;
}
}
}
return errorMessage.Equals(string.Empty);
}
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);
}
void AddFlowElementsToDesigner(IList <ModelItem> flowElementMICollection, bool addConnectorAfterLoaded = false)
{
Queue <ModelItem> flowElementsToProcess = new Queue <ModelItem>();
List <UIElement> viewsAdded = new List <UIElement>();
foreach (ModelItem model in flowElementMICollection)
{
ModelItem itemOnCanvas = GetCorrespondingElementOnCanvas(model);
if (!this.modelElement.ContainsKey(itemOnCanvas))
{
flowElementsToProcess.Enqueue(model);
viewsAdded.Add(ProcessAndGetModelView(itemOnCanvas));
}
else if (!this.panel.Children.Contains(this.modelElement[itemOnCanvas]))
{
flowElementsToProcess.Enqueue(model);
viewsAdded.Add(this.modelElement[itemOnCanvas]);
}
}
ModelItem startNodeModelItem = null;
List <Tuple <UIElement, UIElement, ModelItem> > elem2elemConnections = new List <Tuple <UIElement, UIElement, ModelItem> >();
List <Tuple <ConnectionPoint, UIElement, ModelItem> > point2elemConnections = new List <Tuple <ConnectionPoint, UIElement, ModelItem> >();
while (flowElementsToProcess.Count > 0)
{
ModelItem currentMI = flowElementsToProcess.Dequeue();
//Create links for the current FlowNode.
//First of all check if this is connected to the start node.
if (this.ModelItem.Properties["StartNode"].Value != null &&
this.ModelItem.Properties["StartNode"].Value.Equals(currentMI))
{
startNodeModelItem = currentMI;
}
if (typeof(FlowStep).IsAssignableFrom(currentMI.ItemType))
{
ModelItem linkDest = currentMI.Properties["Next"].Value;
if (linkDest != null)
{
ModelItem src = GetCorrespondingElementOnCanvas(currentMI);
ModelItem dest = GetCorrespondingElementOnCanvas(linkDest);
if (!modelElement.ContainsKey(dest))
{
viewsAdded.Add(ProcessAndGetModelView(dest));
flowElementsToProcess.Enqueue(linkDest);
}
elem2elemConnections.Add(Tuple.Create(modelElement[src], modelElement[dest], currentMI));
}
}
else if (typeof(FlowDecision).IsAssignableFrom(currentMI.ItemType))
{
ModelItem trueDest = currentMI.Properties["True"].Value;
ModelItem falseDest = currentMI.Properties["False"].Value;
if (trueDest != null)
{
ConnectionPoint srcConnectionPoint = FlowchartDesigner.GetTrueConnectionPoint(modelElement[currentMI]);
ModelItem trueDestOnCanvas = GetCorrespondingElementOnCanvas(trueDest);
if (!modelElement.ContainsKey(trueDestOnCanvas))
{
viewsAdded.Add(ProcessAndGetModelView(trueDestOnCanvas));
flowElementsToProcess.Enqueue(trueDest);
}
point2elemConnections.Add(Tuple.Create(srcConnectionPoint, modelElement[trueDestOnCanvas], currentMI));
}
if (falseDest != null)
{
ConnectionPoint srcConnectionPoint = FlowchartDesigner.GetFalseConnectionPoint(modelElement[currentMI]);
ModelItem falseDestOnCanvas = GetCorrespondingElementOnCanvas(falseDest);
if (!modelElement.ContainsKey(falseDestOnCanvas))
{
viewsAdded.Add(ProcessAndGetModelView(falseDestOnCanvas));
flowElementsToProcess.Enqueue(falseDest);
}
point2elemConnections.Add(Tuple.Create(srcConnectionPoint, modelElement[falseDestOnCanvas], currentMI));
}
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(currentMI.ItemType))
{
IModelTreeItem modelTreeItem = this.ModelItem as IModelTreeItem;
ModelItem defaultCase = currentMI.Properties["Default"].Value;
if (defaultCase != null)
{
ModelItem defaultCaseOnCanvas = GetCorrespondingElementOnCanvas(defaultCase);
if (!modelElement.ContainsKey(defaultCaseOnCanvas))
{
viewsAdded.Add(ProcessAndGetModelView(defaultCaseOnCanvas));
flowElementsToProcess.Enqueue(defaultCase);
}
IFlowSwitchLink link = GenericFlowSwitchHelper.CreateFlowSwitchLink(currentMI.ItemType, currentMI, null, true);
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
elem2elemConnections.Add(Tuple.Create(modelElement[currentMI], modelElement[defaultCaseOnCanvas], linkModelItem));
}
Type genericType = currentMI.ItemType.GetGenericArguments()[0];
foreach (ModelItem key in GenericFlowSwitchHelper.GetCaseKeys(currentMI.Properties["Cases"]))
{
ModelItem destFlowElementMI = GenericFlowSwitchHelper.GetCaseModelItem(currentMI.Properties["Cases"], (key == null) ? null : key.GetCurrentValue());
IFlowSwitchLink link = GenericFlowSwitchHelper.CreateFlowSwitchLink(currentMI.ItemType, currentMI, (key == null) ? null : key.GetCurrentValue(), false);
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
ModelItem destModelItem = GetCorrespondingElementOnCanvas(destFlowElementMI);
if (!modelElement.ContainsKey(destModelItem))
{
viewsAdded.Add(ProcessAndGetModelView(destModelItem));
flowElementsToProcess.Enqueue(destFlowElementMI);
}
elem2elemConnections.Add(Tuple.Create(modelElement[currentMI], modelElement[destModelItem], linkModelItem));
}
}
else
{
Fx.Assert(false, "Unknown type of FlowNode");
}
}
if (!this.startNodeAdded)
{
panel.Children.Add(this.StartSymbol);
this.startNodeAdded = true;
}
foreach (UIElement view in viewsAdded)
{
panel.Children.Add(view);
}
// connection between flownode should be create only after all flownodes have been loaded on the canvas
if (addConnectorAfterLoaded)
{
this.Dispatcher.BeginInvoke(DispatcherPriority.Loaded, new Action(() =>
{
if (this.isLoaded)
{
AddConnectorsToPanel(startNodeModelItem, elem2elemConnections, point2elemConnections);
}
}));
}
else
{
AddConnectorsToPanel(startNodeModelItem, elem2elemConnections, point2elemConnections);
}
}
internal bool CreateLinkGesture(UIElement source, ConnectionPoint destConnectionPoint, Point mouseLocation, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
bool linkCreated = false;
double minDist;
errorMessage = string.Empty;
ConnectionPoint sourceConnectionPoint = FindClosestConnectionPoint(
mouseLocation,
FlowchartDesigner.GetConnectionPoints(source).Where(p => p.PointType != ConnectionPointKind.Incoming).ToList(),
out minDist);
if (sourceConnectionPoint != null)
{
linkCreated = CreateLinkGesture(sourceConnectionPoint, destConnectionPoint, out errorMessage, isLinkValidDueToLinkMove, caseKey);
}
else
{
errorMessage = SR.FCInvalidLink;
}
return(linkCreated);
}
internal bool CreateLinkGesture(ConnectionPoint sourceConnectionPoint, UIElement dest, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
bool linkCreated = false;
ConnectionPoint destConnectionPoint = ClosestDestConnectionPoint(sourceConnectionPoint, dest, out errorMessage);
if (destConnectionPoint != null)
{
linkCreated = CreateLinkGesture(sourceConnectionPoint, destConnectionPoint, out errorMessage, isLinkValidDueToLinkMove, caseKey);
}
return(linkCreated);
}
internal bool CreateLinkGesture(ConnectionPoint sourceConnectionPoint, ConnectionPoint destConnectionPoint, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
Fx.Assert(this.panel != null, "This code should not be hit if panel is null");
Fx.Assert(sourceConnectionPoint != null, "sourceConnectionPoint is null.");
Fx.Assert(destConnectionPoint != null, "destConnectionPoint is null.");
bool linkCreated = false;
errorMessage = string.Empty;
if (destConnectionPoint.PointType != ConnectionPointKind.Outgoing && sourceConnectionPoint.PointType != ConnectionPointKind.Incoming)
{
using (EditingScope es = (EditingScope)this.ModelItem.BeginEdit(SR.FCCreateLink))
{
linkCreated = UpdateFlowChartObject(sourceConnectionPoint, destConnectionPoint, out errorMessage, isLinkValidDueToLinkMove, caseKey);
try
{
es.Complete();
}
catch (ArgumentException)
{
errorMessage = SR.InvalidFlowSwitchCaseMessage;
linkCreated = false;
}
}
}
else
{
errorMessage = SR.FCInvalidLink;
}
return(linkCreated);
}
//Interfaces for users to create links on the flowchart.
internal bool CreateLinkGesture(ConnectionPoint sourceConnectionPoint, ConnectionPoint destConnectionPoint, out string errorMessage, IFlowSwitchLink caseKey)
{
return(CreateLinkGesture(sourceConnectionPoint, destConnectionPoint, out errorMessage, false, caseKey));
}
bool UpdateFlowChartObject(ConnectionPoint sourceConnPoint, ConnectionPoint destConnPoint, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
//srcDesigner will be null for the case where source designer is StartSymbol.
VirtualizedContainerService.VirtualizingContainer srcDesigner = sourceConnPoint.ParentDesigner as VirtualizedContainerService.VirtualizingContainer;
VirtualizedContainerService.VirtualizingContainer destDesigner = destConnPoint.ParentDesigner as VirtualizedContainerService.VirtualizingContainer;
ModelItem linkSource;
ModelItem linkDest = destDesigner.ModelItem;
ModelItem destFlowElementMI = GetFlowElementMI(linkDest);
PointCollection connectorViewState = new PointCollection(ConnectorRouter.Route(this.panel, sourceConnPoint, destConnPoint));
errorMessage = string.Empty;
if (sourceConnPoint.ParentDesigner is StartSymbol)
{
linkSource = this.ModelItem;
if (linkSource.Properties["StartNode"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(linkSource, connectorViewState, sourceConnPoint);
linkSource.Properties["StartNode"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCNextLinkDefined;
}
}
else
{
linkSource = srcDesigner.ModelItem;
ModelItem srcFlowElementMI = GetFlowElementMI(linkSource);
if (typeof(FlowStep).IsAssignableFrom(srcFlowElementMI.ItemType))
{
if (srcFlowElementMI.Properties["Next"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(srcFlowElementMI, connectorViewState, sourceConnPoint);
srcFlowElementMI.Properties["Next"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCNextLinkDefined;
}
}
else if (typeof(FlowDecision).IsAssignableFrom(srcFlowElementMI.ItemType))
{
if (sourceConnPoint.Equals(FlowchartDesigner.GetTrueConnectionPoint(this.modelElement[linkSource])))
{
if (linkSource.Properties["True"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(srcFlowElementMI, connectorViewState, sourceConnPoint);
linkSource.Properties["True"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCTrueBranchExists;
}
}
else if (sourceConnPoint.Equals(FlowchartDesigner.GetFalseConnectionPoint(this.modelElement[linkSource])))
{
if (linkSource.Properties["False"].Value == null || isLinkValidDueToLinkMove)
{
this.StoreConnectorViewState(srcFlowElementMI, connectorViewState, sourceConnPoint);
linkSource.Properties["False"].SetValue(destFlowElementMI);
}
else
{
errorMessage = SR.FCFalseBranchExists;
}
}
else
{
errorMessage = SR.FCFlowConditionLinkError;
}
}
else //FlowSwitch
{
if (!CreateFlowSwitchLink(sourceConnPoint, srcFlowElementMI, destFlowElementMI, caseKey, connectorViewState, ref errorMessage))
{
return(false);
}
}
}
return(errorMessage.Equals(string.Empty));
}
internal bool CreateLinkGesture(UIElement source, ConnectionPoint destConnectionPoint, Point mouseLocation, out string errorMessage, bool isLinkValidDueToLinkMove, IFlowSwitchLink caseKey)
{
bool linkCreated = false;
double minDist;
errorMessage = string.Empty;
ConnectionPoint sourceConnectionPoint = FindClosestConnectionPoint(
mouseLocation,
FlowchartDesigner.GetConnectionPoints(source).Where(p => p.PointType != ConnectionPointKind.Incoming).ToList(),
out minDist);
if (sourceConnectionPoint != null)
{
linkCreated = CreateLinkGesture(sourceConnectionPoint, destConnectionPoint, out errorMessage, isLinkValidDueToLinkMove, caseKey);
}
else
{
errorMessage = SR.FCInvalidLink;
}
return linkCreated;
}
internal bool CreateLinkGesture(UIElement source, UIElement dest, out string errorMessage, IFlowSwitchLink caseKey)
{
bool linkCreated = false;
ConnectionPoint srcConnPoint, destConnPoint;
GetSrcDestConnectionPoints(source, dest, out srcConnPoint, out destConnPoint, out errorMessage);
if (srcConnPoint != null && destConnPoint != null)
{
linkCreated = CreateLinkGesture(srcConnPoint, destConnPoint, out errorMessage, caseKey);
}
return linkCreated;
}
internal bool CreateLinkGesture(UIElement source, UIElement dest, out string errorMessage, IFlowSwitchLink caseKey)
{
bool linkCreated = false;
ConnectionPoint srcConnPoint, destConnPoint;
GetSrcDestConnectionPoints(source, dest, out srcConnPoint, out destConnPoint, out errorMessage);
if (srcConnPoint != null && destConnPoint != null)
{
linkCreated = CreateLinkGesture(srcConnPoint, destConnPoint, out errorMessage, caseKey);
}
return(linkCreated);
}
