FakeModelItemImpl WrapValue(object value)
{
FakeModelItemImpl wrappedValue = value as FakeModelItemImpl;
if (null == wrappedValue && null != value)
{
wrappedValue = new FakeModelItemImpl(this.parentModelTreeItem.ModelTreeManager, this.PropertyType, value, (FakeModelItemImpl)this.Parent);
}
return(wrappedValue);
}
public override ModelItem SetValue(object value)
{
//are we already setting value?
if (!isSettingValue)
{
try
{
this.isSettingValue = true;
//create new value
this.temporaryValue = this.WrapValue(value);
//is there a value stored already?
if (this.parentModelTreeItem.ModelPropertyStore.ContainsKey(this.Name))
{
//yes - cleanup references
IModelTreeItem item = (IModelTreeItem)this.parentModelTreeItem.ModelPropertyStore[this.Name];
item.RemoveSource(this);
item.RemoveParent(this.parentModelTreeItem.ModelItem);
//and remove it
this.parentModelTreeItem.ModelPropertyStore.Remove(this.Name);
}
//set it onto underlying object
this.PropertyDescriptor.SetValue(this.Parent.GetCurrentValue(), (null != this.temporaryValue ? this.temporaryValue.GetCurrentValue() : null));
//store it in parent's store
this.temporaryValue = this.StoreValue(this.temporaryValue);
//notify listeners - notification must be postponed until actual underlying object value is updated, otherwise, listeners might get old value
this.parentModelTreeItem.ModelTreeManager.AddToCurrentEditingScope(new FakeModelNotifyPropertyChange(this.parentModelTreeItem, this.Name));
}
catch (ValidationException e)
{
Trace.WriteLine(e.ToString());
//it is important to rethrow exception here - otherwise, DataGrid will assume operation completed successfully
throw;
}
finally
{
this.isSettingValue = false;
}
}
return this.temporaryValue;
}
public override ModelItem SetValue(object value)
{
//are we already setting value?
if (!isSettingValue)
{
try
{
this.isSettingValue = true;
//create new value
this.temporaryValue = this.WrapValue(value);
//is there a value stored already?
if (this.parentModelTreeItem.ModelPropertyStore.ContainsKey(this.Name))
{
//yes - cleanup references
IModelTreeItem item = (IModelTreeItem)this.parentModelTreeItem.ModelPropertyStore[this.Name];
item.RemoveSource(this);
item.RemoveParent(this.parentModelTreeItem.ModelItem);
//and remove it
this.parentModelTreeItem.ModelPropertyStore.Remove(this.Name);
}
//set it onto underlying object
this.PropertyDescriptor.SetValue(this.Parent.GetCurrentValue(), (null != this.temporaryValue ? this.temporaryValue.GetCurrentValue() : null));
//store it in parent's store
this.temporaryValue = this.StoreValue(this.temporaryValue);
//notify listeners - notification must be postponed until actual underlying object value is updated, otherwise, listeners might get old value
this.parentModelTreeItem.ModelTreeManager.AddToCurrentEditingScope(new FakeModelNotifyPropertyChange(this.parentModelTreeItem, this.Name));
}
catch (ValidationException e)
{
Trace.WriteLine(e.ToString());
//it is important to rethrow exception here - otherwise, DataGrid will assume operation completed successfully
throw;
}
finally
{
this.isSettingValue = false;
}
}
return(this.temporaryValue);
}
FakeModelItemImpl StoreValue(object value)
{
FakeModelItemImpl wrappedValue = WrapValue(value);
if (null != wrappedValue)
{
this.parentModelTreeItem.ModelPropertyStore[this.Name] = wrappedValue;
IModelTreeItem modelTreeItem = (IModelTreeItem)wrappedValue;
modelTreeItem.SetSource(this);
}
else
{
ModelItem existing = null;
if (this.parentModelTreeItem.ModelPropertyStore.TryGetValue(this.Name, out existing))
{
IModelTreeItem modelTreeItem = (IModelTreeItem)existing;
modelTreeItem.RemoveSource(this);
modelTreeItem.RemoveParent(this.Parent);
}
this.parentModelTreeItem.ModelPropertyStore.Remove(this.Name);
}
return(wrappedValue);
}
public FakeModelPropertyImpl(FakeModelItemImpl parent, PropertyDescriptor propertyDescriptor)
: base(parent, propertyDescriptor, false)
{
this.parentModelTreeItem = (IModelTreeItem)parent;
}
FakeModelItemImpl WrapValue(object value)
{
FakeModelItemImpl wrappedValue = value as FakeModelItemImpl;
if (null == wrappedValue && null != value)
{
wrappedValue = new FakeModelItemImpl(this.parentModelTreeItem.ModelTreeManager, this.PropertyType, value, (FakeModelItemImpl)this.Parent);
}
return wrappedValue;
}
Connector CreatePropertyLink(ModelItem srcModelItem, ModelItem propertyValue, string propertyName)
{
Connector newConnector = null;
if (typeof(FlowStep).IsAssignableFrom(srcModelItem.ItemType))
{
ModelItem src = GetCorrespondingElementOnCanvas(srcModelItem);
ModelItem dest = GetCorrespondingElementOnCanvas(propertyValue);
newConnector = CreateLink(modelElement[src], modelElement[dest], srcModelItem);
}
else if (typeof(FlowDecision).IsAssignableFrom(srcModelItem.ItemType))
{
ModelItem dest = GetCorrespondingElementOnCanvas(propertyValue);
ConnectionPoint srcConnPoint;
if (propertyName.Equals("True"))
{
srcConnPoint = FlowchartDesigner.GetTrueConnectionPoint(modelElement[srcModelItem]);
}
else
{
srcConnPoint = FlowchartDesigner.GetFalseConnectionPoint(modelElement[srcModelItem]);
}
newConnector = CreateLink(srcConnPoint, modelElement[dest], srcModelItem);
}
else if (GenericFlowSwitchHelper.IsGenericFlowSwitch(srcModelItem.ItemType))
{
ModelItem dest = GetCorrespondingElementOnCanvas(propertyValue);
IFlowSwitchLink link;
if (propertyName.Equals("Default"))
{
link = GenericFlowSwitchHelper.CreateFlowSwitchLink(srcModelItem.ItemType, srcModelItem, null, true);
}
else
{
Fx.Assert(propertyName.Length >= GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier.Length, "Case property names should be prepended by the string GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier");
link = GenericFlowSwitchHelper.CreateFlowSwitchLink(srcModelItem.ItemType, srcModelItem, propertyName.Substring(GenericFlowSwitchHelper.FlowSwitchCasesKeyIdentifier.Length), false);
}
IModelTreeItem modelTreeItem = (IModelTreeItem)this.ModelItem;
ModelItem linkModelItem = new FakeModelItemImpl(modelTreeItem.ModelTreeManager, link.GetType(), link, null);
link.ModelItem = linkModelItem;
newConnector = CreateLink(modelElement[srcModelItem], modelElement[dest], linkModelItem);
}
else // FlowStart
{
ModelItem dest = GetCorrespondingElementOnCanvas(propertyValue);
newConnector = CreateLink(this.StartSymbol, modelElement[dest], this.ModelItem);
}
return newConnector;
}
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);
}
}
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);
}
}
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;
}
public FakeModelPropertyImpl(FakeModelItemImpl parent, PropertyDescriptor propertyDescriptor)
: base(parent, propertyDescriptor, false)
{
this.parentModelTreeItem = (IModelTreeItem)parent;
}