/// <summary>
/// The implementation of VsShell.ISelectionContainer.SelectObjects in
/// ModelingWindowPane calls DoSelectObjects()
/// - base calls to DiagramDocView : ModelingDocView : ModelingWindowPane
/// if (this.CurrentDesigner != null) -> sets selection in the current designer
/// else calls to ModelingWindowPane which is a no-op
/// This seems to only be called when the user chooses an item from the
/// drop down box at the top of the properties screen
/// </summary>
/// <returns></returns>
protected override void DoSelectObjects(uint count, object[] objects, uint flags)
{
// We have to reverse the logic of the GetSelectX fn above; that is, convert the
// array of our ItemDescriptors back into an array of Dsl ModelElements before
// calling the base impl; the base impl will then select the shape
var objectsSelected = new ArrayList();
var selectedModelObjects = new List <EFObject>();
uint nonPropertyObjectsCount = 0;
if (count > 0)
{
foreach (var o in objects)
{
var typeDesc = o as ObjectDescriptor;
Debug.Assert(typeDesc != null, "Something unexpected was selected");
if (typeDesc != null)
{
selectedModelObjects.Add(typeDesc.WrappedItem);
// Properties do not have a corresponding ShapeElement; the instance of the DomainClass is just an item
// within the ElementListCompartment. Since this override only accepts a list of ShapeElements, we will
// have to use the DSLDesignerNavigationHelper to create a DiagramItem that uniquely identifies the
// list compartment item and select that.
if (typeDesc.WrappedItem is PropertyBase)
{
DSLDesignerNavigationHelper.NavigateTo(typeDesc.WrappedItem);
}
else
{
// For all other EFObjects, we can attempt to get a ShapeElement
nonPropertyObjectsCount++;
var dslElem = XRef.GetExisting(typeDesc.WrappedItem);
var presElem = dslElem as DslDiagrams.PresentationElement;
if (presElem == null)
{
var shapes =
DslDiagrams.PresentationViewsSubject.GetPresentation(dslElem);
// just select the first shape for this item
if (shapes != null &&
shapes.Count > 0)
{
presElem = shapes[0];
}
}
Debug.Assert(presElem != null, "Why couldn't we find the shape for this ModelElement?");
if (presElem != null)
{
objectsSelected.Add(presElem);
}
}
}
}
Debug.Assert(
nonPropertyObjectsCount == objectsSelected.Count,
"nonPropertyObjectsCount(" + nonPropertyObjectsCount + ") != objectsSelected.Count (" + objectsSelected.Count + ")");
}
// update the selection for the Entity Designer in case anyone else is interested
Context.Items.SetValue(new EntityDesignerSelection(selectedModelObjects));
if (nonPropertyObjectsCount > 0 &&
nonPropertyObjectsCount == objectsSelected.Count)
{
// If we didn't encounter any property descriptors and the number of those descriptors equals the objects selected,
// then we can pass this on to the base implementation to perform the selection
var objectsToSelect = new object[objectsSelected.Count];
objectsSelected.CopyTo(objectsToSelect, 0);
base.DoSelectObjects(nonPropertyObjectsCount, objectsToSelect, flags);
}
else if (nonPropertyObjectsCount != objectsSelected.Count)
{
// We should have found objects to select from all the non-property descriptors. If for some reason we didn't,
// then we pass this onto the base implementation
base.DoSelectObjects(count, objects, flags);
}
}
/// <summary>
/// This uses the XRef in our context to find the Model item that is the basis for
/// each DSL object in the selection collection. For each Model item, we get the correct
/// item descriptor and create a new selection array of these.
/// </summary>
/// <param name="objects"></param>
/// <returns></returns>
private ArrayList ConvertDslModelElementArrayToItemDescriptors(object[] objects, bool gettingAllObjects)
{
// save off this reference
var selectedDesignerObjects = objects;
// create a new array to hold the item descriptors
var selectedModelObjects = new List <EFObject>();
var selectedModelObjectDescriptors = new ArrayList();
foreach (var o in selectedDesignerObjects)
{
DslModeling.ModelElement dslElem = null;
var elemList = o as DslDiagrams.ElementListCompartment;
var presElem = o as DslDiagrams.PresentationElement;
if (elemList != null)
{
// if the user selects a compartment element, we want to display the entity-type and the shape property.
if (elemList.IsNestedChild &&
elemList.ParentShape != null)
{
presElem = elemList.ParentShape;
dslElem = presElem.ModelElement;
}
else
{
// they have selected one of the compartments, probably wanting to show
// the right-click context menu
continue;
}
}
else if (presElem != null)
{
// if this is a shape, gets it corresponding DSL object
dslElem = presElem.ModelElement;
}
else
{
// o is a non-shape
dslElem = o as DslModeling.ModelElement;
}
// there might be no ModelElement corresponding to the selected object
if (dslElem != null)
{
EFObject modelElem;
// If an EntityType is selected in DSL canvas, we want to show the property of the EntityTypeShape.
if (dslElem is EntityType &&
presElem != null)
{
modelElem = XRef.GetExisting(presElem);
}
else
{
modelElem = XRef.GetExisting(dslElem);
}
// model element might not be yet created
if (modelElem != null)
{
selectedModelObjects.Add(modelElem);
selectedModelObjectDescriptors.Add(PropertyWindowViewModel.GetObjectDescriptor(modelElem, Context, true));
}
}
}
if (gettingAllObjects == false)
{
// update the selection for the Entity Designer in case anyone else is interested
if (Context != null &&
Context.Items != null)
{
Context.Items.SetValue(new EntityDesignerSelection(selectedModelObjects));
}
}
return(selectedModelObjectDescriptors);
}
