private void UpdateSelection(Collection <ISelectable> itemsToSelect, Rect rubberBand, DiagramDesignerCanvas dCanvas)
{
foreach (Control item in dCanvas.Children)
{
Rect itemRect = VisualTreeHelper.GetDescendantBounds(item);
Rect itemBounds = item.TransformToAncestor(designerCanvas).TransformBounds(itemRect);
// drag decorator requires this;
itemBounds.Inflate(-DragDecoratorInflateValue, -DragDecoratorInflateValue);
if (rubberBand.Contains(itemBounds))
{
if (item is ISelectable)
{
itemsToSelect.Add(item as ISelectable);
}
}
if (item is DiagramDesignerItem)
{
DiagramDesignerItem designerItem = item as DiagramDesignerItem;
if (designerItem.IsDiagramLink)
{
continue;
}
DiagramDesignerCanvas canvas = DiagramHelper.GetChild(designerItem, typeof(DiagramDesignerCanvas)) as DiagramDesignerCanvas;
if (canvas != null)
{
UpdateSelection(itemsToSelect, rubberBand, canvas);
}
}
}
}
private static void IsSelectedPropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
DiagramDesignerItem item = obj as DiagramDesignerItem;
if (item.DataContext != null)
{
if (item != null)
{
DiagramDesigner designer = DiagramHelper.GetDiagramDesigner(item) as DiagramDesigner;
if (designer != null)
{
if ((bool)args.NewValue)
{
if (!designer.SelectionService.CurrentSelection.Contains(item))
{
designer.SelectionService.AddToSelection(item, false);
}
if (item.IsSelected && !item.IsFocused)
{
item.Focus();
}
}
else
{
if (designer.SelectionService.CurrentSelection.Contains(item))
{
designer.SelectionService.RemoveFromSelection(item, false);
}
}
}
}
}
}
/// <summary>
/// Dragging has started, see if VM is IDiagramLinkViewModel and notify of moving start.
/// </summary>
void DragThumb_DragStarted(object sender, DragStartedEventArgs e)
{
diagramDesigner = DiagramHelper.GetDiagramDesigner(this);
diagramDesignerVM = diagramDesigner.DataContext as IDiagramViewModel;
selectedItem = null;
selectedItemVM = null;
edgePointVM = this.DataContext as IEdgePointViewModel;
List <ISelectable> selection = diagramDesigner.SelectionService.CurrentSelection;
if (selection.Count == 1)
{
foreach (ISelectable item in selection)
{
if (item is DiagramDesignerItem)
{
if ((item as DiagramDesignerItem).IsDiagramLink)
{
selectedItem = item as DiagramDesignerItem;
}
}
}
// create control to display on the drag adorner
dragCanvas = new Canvas();
IDiagramLinkViewModel designerItem = selectedItem.DataContext as IDiagramLinkViewModel;
selectedItemVM = designerItem;
AddLinkAnchorAndShape(new PointD(designerItem.StartEdgePoint.X, designerItem.StartEdgePoint.Y),
new PointD(designerItem.EndEdgePoint.X, designerItem.EndEdgePoint.Y));
// create drag adorner
if (diagramDesigner != null && selectedItemVM != null && selectedItem != null && edgePointVM != null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(diagramDesigner);
if (adornerLayer != null)
{
this.dragAdorner = new DragAdorner(diagramDesigner, dragCanvas, false, 1.0);
if (this.dragAdorner != null)
{
adornerLayer.Add(this.dragAdorner);
e.Handled = true;
}
}
}
}
e.Handled = false;
}
/// <summary>
/// Dragging has started, see if VM is IDiagramLinkViewModel and notify of moving start.
/// </summary>
void DragThumb_DragStarted(object sender, DragStartedEventArgs e)
{
diagramDesigner = DiagramHelper.GetDiagramDesigner(this);
diagramDesignerVM = diagramDesigner.DataContext as IDiagramViewModel;
selectedItem = null;
selectedItemVM = null;
edgePointVM = this.DataContext as IEdgePointViewModel;
List<ISelectable> selection = diagramDesigner.SelectionService.CurrentSelection;
if (selection.Count == 1)
{
foreach (ISelectable item in selection)
{
if (item is DiagramDesignerItem)
if ((item as DiagramDesignerItem).IsDiagramLink)
{
selectedItem = item as DiagramDesignerItem;
}
}
// create control to display on the drag adorner
dragCanvas = new Canvas();
IDiagramLinkViewModel designerItem = selectedItem.DataContext as IDiagramLinkViewModel;
selectedItemVM = designerItem;
AddLinkAnchorAndShape(new PointD(designerItem.StartEdgePoint.X, designerItem.StartEdgePoint.Y),
new PointD(designerItem.EndEdgePoint.X, designerItem.EndEdgePoint.Y));
// create drag adorner
if (diagramDesigner != null && selectedItemVM != null && selectedItem != null && edgePointVM != null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(diagramDesigner);
if (adornerLayer != null)
{
this.dragAdorner = new DragAdorner(diagramDesigner, dragCanvas, false, 1.0);
if (this.dragAdorner != null)
{
adornerLayer.Add(this.dragAdorner);
e.Handled = true;
}
}
}
}
e.Handled = false;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="designer">Diagram designer.</param>
/// <param name="sourceConnector">Source item of the relationship.</param>
/// <param name="startPoint">Start point.</param>
public DiagramConnectorAdorner(DiagramDesigner designer, DiagramConnector sourceConnector, Point startPoint)
: base(designer)
{
this.diagramDesigner = designer;
if (this.diagramDesigner.DataContext is IDiagramViewModel)
diagramDesignerVM = this.diagramDesigner.DataContext as IDiagramViewModel;
this.sourceConnector = sourceConnector;
this.startPoint = startPoint;
sourceItem = sourceConnector.DiagramItem;
//if (sourceConnector.DiagramItem is ISelectable)
// this.sourceElement = (sourceConnector.DiagramItem as ISelectable).SelectedData;
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
this.Cursor = Cursors.Cross;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="designer">Diagram designer.</param>
/// <param name="sourceConnector">Source item of the relationship.</param>
/// <param name="startPoint">Start point.</param>
public DiagramConnectorAdorner(DiagramDesigner designer, DiagramConnector sourceConnector, Point startPoint)
: base(designer)
{
this.diagramDesigner = designer;
if (this.diagramDesigner.DataContext is IDiagramViewModel)
{
diagramDesignerVM = this.diagramDesigner.DataContext as IDiagramViewModel;
}
this.sourceConnector = sourceConnector;
this.startPoint = startPoint;
sourceItem = sourceConnector.DiagramItem;
//if (sourceConnector.DiagramItem is ISelectable)
// this.sourceElement = (sourceConnector.DiagramItem as ISelectable).SelectedData;
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
this.Cursor = Cursors.Cross;
}
/// <summary>
/// Hit testing.
/// </summary>
/// <param name="hitPoint">Location to do a hit test at.</param>
private void HitTesting(Point hitPoint)
{
DependencyObject hitObject = diagramDesigner.InputHitTest(hitPoint) as DependencyObject;
while (hitObject != null)
{
if (hitObject is DiagramDesignerItem)
{
hitItem = hitObject as DiagramDesignerItem;
if (!hitItem.IsDiagramLink)
{
if (sourceItem != null && hitItem != null && this.diagramDesigner.CreateRelationshipCommand != null)
{
object sourceData = sourceItem.SelectedData;
object targetData = hitItem.SelectedData;
if (sourceData != null && targetData != null)
{
ViewModelRelationshipCreationInfo info = new ViewModelRelationshipCreationInfo(sourceData, targetData);
if (info.Source != null && info.Target != null)
{
if (this.diagramDesigner.CreateRelationshipCommand.CanExecute(info))
{
return;
}
}
}
}
}
hitItem = null;
return;
}
hitObject = VisualTreeHelper.GetParent(hitObject);
}
hitItem = null;
}
/// <summary>
/// Gets the item that is directly under the mouse.
/// </summary>
/// <param name="position">Position.</param>
/// <returns>Item under the mouse or null.</returns>
public object GetItemAtPosition(PointD position)
{
DiagramDesignerItem hitItem = null;
DependencyObject hitObject = this.InputHitTest(position.ToPoint()) as DependencyObject;
while (hitObject != null)
{
if (hitObject is DiagramDesignerItem)
{
hitItem = hitObject as DiagramDesignerItem;
break;
}
hitObject = VisualTreeHelper.GetParent(hitObject);
}
if (hitItem != null)
{
return(hitItem.DataContext);
}
else
{
return(null);
}
}
/// <summary>
/// Hit testing.
/// </summary>
/// <param name="hitPoint">Location to do a hit test at.</param>
private void HitTesting(Point hitPoint)
{
DependencyObject hitObject = diagramDesigner.InputHitTest(hitPoint) as DependencyObject;
while (hitObject != null )
{
if (hitObject is DiagramDesignerItem)
{
hitItem = hitObject as DiagramDesignerItem;
if (!hitItem.IsDiagramLink)
{
if (sourceItem != null && hitItem != null && this.diagramDesigner.CreateRelationshipCommand != null)
{
object sourceData = sourceItem.SelectedData;
object targetData = hitItem.SelectedData;
if (sourceData != null && targetData != null)
{
ViewModelRelationshipCreationInfo info = new ViewModelRelationshipCreationInfo(sourceData, targetData);
if (info.Source != null && info.Target != null)
if (this.diagramDesigner.CreateRelationshipCommand.CanExecute(info))
{
return;
}
}
}
}
hitItem = null;
return;
}
hitObject = VisualTreeHelper.GetParent(hitObject);
}
hitItem = null;
}
