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);
}
}
}
}
/// <summary>
/// Process selection operation
/// </summary>
/// <param name="e"></param>
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
// if mouse button is not pressed we have no drag operation, ...
if (e.LeftButton != MouseButtonState.Pressed)
{
this.dragStartPoint = null;
}
// but if mouse button is pressed and start point value is set we do have one
if (this.dragStartPoint.HasValue)
{
// create connection adorner
DiagramDesigner designer = DiagramHelper.GetDiagramDesigner(this);
if (designer != null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(designer);
if (adornerLayer != null)
{
DiagramConnectorAdorner adorner = new DiagramConnectorAdorner(designer, this, this.dragStartPoint.Value);
if (adorner != null)
{
adornerLayer.Add(adorner);
e.Handled = true;
}
}
}
}
}
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>
/// Updates the selection for this item.
/// </summary>
/// <param name="bSelect">True if this item should be selected; false otherwise.</param>
protected virtual void UpdateSelection(bool bSelect)
{
DiagramDesigner designer = DiagramHelper.GetDiagramDesigner(this) as DiagramDesigner;
// update selection
if (designer != null)
{
if ((Keyboard.Modifiers & (ModifierKeys.Shift | ModifierKeys.Control)) != ModifierKeys.None)
{
if (bSelect && this.IsSelected)
{
designer.SelectionService.RemoveFromSelection(this);
}
else if (!this.IsSelected)
{
designer.SelectionService.AddToSelection(this);
}
}
else if (!this.IsSelected && bSelect)
{
designer.SelectionService.SelectItem(this);
}
else if (this.IsSelected && !bSelect)
{
designer.SelectionService.RemoveFromSelection(this);
}
}
}
/// <summary>
/// Update selection.
/// </summary>
/// <param name="e"></param>
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
if (this.DataContext is IDiagramLinkViewModel)
{
if (DiagramHelper.GetDiagramDesignerLink((DependencyObject)e.MouseDevice.DirectlyOver) == this)
{
UpdateSelection(true);
if (!this.IsFocused)
{
this.Focus();
}
e.Handled = false;
}
}
else
{
if (DiagramHelper.GetDiagramDesignerItem((DependencyObject)e.MouseDevice.DirectlyOver) == this)
{
UpdateSelection(true);
if (!this.IsFocused)
{
this.Focus();
}
e.Handled = false;
}
}
//DiagramDesignerCanvas.IgnoreRubberbandSelection = true;
base.OnPreviewMouseDown(e);
//DiagramDesignerCanvas.IgnoreRubberbandSelection = false;
}
/// <summary>
/// Contructor.
/// </summary>
/// <param name="designerCanvas">Designer items canvas.</param>
/// <param name="dragStartPoint">Start point.</param>
public DiagramDesignerRubberbandAdorner(DiagramDesignerCanvas designerCanvas, Point?dragStartPoint)
: base(designerCanvas)
{
this.designerCanvas = designerCanvas;
this.designer = DiagramHelper.GetDiagramDesigner(this.designerCanvas);
this.startPoint = dragStartPoint;
rubberbandPen = new Pen(Brushes.LightSlateGray, 1);
rubberbandPen.DashStyle = new DashStyle(new double[] { 2 }, 1);
}
/// <summary>
/// Verifies if this is the top most container in the canvas hierarchy.
/// </summary>
/// <returns>True if this is the top most container; False otherwise.</returns>
public virtual bool IsTopMostContainer()
{
if (DiagramHelper.GetDiagramDesignerItem(this) == null)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Get start point of the possible selection operation.
/// </summary>
/// <param name="e"></param>
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
DiagramDesigner designer = DiagramHelper.GetDiagramDesigner(this);
if (designer != null)
{
// position relative to DesignerCanvas
this.dragStartPoint = new Point?(e.GetPosition(designer));
e.Handled = true;
}
}
/// <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;
}
//private Point? rubberbandSelectionStartPoint = null;
/*
* /// <summary>
* /// Cancels the rubberband selection.
* /// </summary>
* public void CancelRubberbandSelection()
* {
* this.rubberbandSelectionStartPoint = null;
* }*/
/// <summary>
/// Set the starting point for a possible rubberband selection. Clear selection if
/// this is the top most container.
/// </summary>
/// <param name="e"></param>
protected override void OnMouseDown(MouseButtonEventArgs e)
{
base.OnMouseDown(e);
if (e.Source == this && e.LeftButton == MouseButtonState.Pressed)
{
// in case that this click is the start of a
// drag operation we cache the start point
//this.rubberbandSelectionStartPoint = new Point?(e.GetPosition(this));
DiagramRubberbandSelector.RubberbandSelectionStartPoint = new Point?(e.GetPosition(this));
}
if (e.Source == this && IsTopMostContainer())
{
DiagramDesigner designer = DiagramHelper.GetDiagramDesigner(this);
if (designer != null)
{
if (designer.SelectionService.CurrentSelection.Count > 0)
{
designer.SelectionService.ClearSelection(true);
}
Focus();
}
}
}
/// <summary>
/// Start the drag operation.
/// </summary>
private void Start()
{
diagramDesigner = DiagramHelper.GetDiagramDesigner(this);
diagramDesignerVM = diagramDesigner.DataContext as IDiagramViewModel;
selectedItems = new List <DiagramDesignerItem>();
selectedItemsVM = new List <IDiagramItemViewModel>();
List <ISelectable> selection = diagramDesigner.SelectionService.CurrentSelection;
foreach (ISelectable item in selection)
{
if (item is DiagramDesignerItem)
{
if (!(item as DiagramDesignerItem).IsDiagramLink)
{
selectedItems.Add(item as DiagramDesignerItem);
}
}
}
// create control to display on the drag adorner
Canvas canvas = new Canvas();
foreach (DiagramDesignerItem item in selectedItems)
{
IDiagramItemViewModel designerItem = item.DataContext as IDiagramItemViewModel;
if (designerItem == null)
{
continue;
}
selectedItemsVM.Add(designerItem);
Rectangle r = new Rectangle();
r.Stroke = new SolidColorBrush(Colors.Black);
r.StrokeDashArray = new DoubleCollection();
r.StrokeDashArray.Add(3);
r.StrokeDashArray.Add(6);
r.StrokeThickness = 1.0;
r.Width = item.ActualWidth;
r.Height = item.ActualHeight;
r.Margin = new System.Windows.Thickness(designerItem.AbsoluteLocation.X, designerItem.AbsoluteLocation.Y, 0, 0);
canvas.Children.Add(r);
}
// create drag adorner
if (diagramDesigner != null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(diagramDesigner);
if (adornerLayer != null)
{
this.dragAdorner = new DragAdorner(diagramDesigner, canvas, false, 1.0);
if (this.dragAdorner != null)
{
adornerLayer.Add(this.dragAdorner);
//e.Handled = true;
}
}
}
//e.Handled = false;
}
/// <summary>
/// Start the drag operation.
/// </summary>
private void Start()
{
if (direction == null)
{
if (base.VerticalAlignment == System.Windows.VerticalAlignment.Top)
{
if (base.HorizontalAlignment == System.Windows.HorizontalAlignment.Left)
{
direction = DiagramItemsResizeDirection.LeftTop;
}
else if (base.HorizontalAlignment == System.Windows.HorizontalAlignment.Stretch)
{
direction = DiagramItemsResizeDirection.Top;
}
else
{
direction = DiagramItemsResizeDirection.RightTop;
}
}
else if (base.VerticalAlignment == System.Windows.VerticalAlignment.Bottom)
{
if (base.HorizontalAlignment == System.Windows.HorizontalAlignment.Left)
{
direction = DiagramItemsResizeDirection.LeftBottom;
}
else if (base.HorizontalAlignment == System.Windows.HorizontalAlignment.Stretch)
{
direction = DiagramItemsResizeDirection.Bottom;
}
else
{
direction = DiagramItemsResizeDirection.RightBottom;
}
}
else
{
if (base.HorizontalAlignment == System.Windows.HorizontalAlignment.Left)
{
direction = DiagramItemsResizeDirection.Left;
}
else
{
direction = DiagramItemsResizeDirection.Right;
}
}
}
diagramDesigner = DiagramHelper.GetDiagramDesigner(this);
diagramDesignerVM = diagramDesigner.DataContext as IDiagramViewModel;
selectedItems = new List <DiagramDesignerItem>();
selectedItemsVM = new List <IDiagramItemViewModel>();
List <ISelectable> selection = diagramDesigner.SelectionService.CurrentSelection;
foreach (ISelectable item in selection)
{
if (item is DiagramDesignerItem)
{
if (!(item as DiagramDesignerItem).IsDiagramLink)
{
selectedItems.Add(item as DiagramDesignerItem);
}
}
}
// create control to display on the drag adorner
dragCanvas = new Canvas();
foreach (DiagramDesignerItem item in selectedItems)
{
if (item.DataContext is IDiagramItemViewModel)
{
selectedItemsVM.Add(item.DataContext as IDiagramItemViewModel);
}
Rectangle r = new Rectangle();
r.Stroke = new SolidColorBrush(Colors.Black);
r.StrokeDashArray = new DoubleCollection();
r.StrokeDashArray.Add(3);
r.StrokeDashArray.Add(6);
r.StrokeThickness = 1.0;
r.Width = item.ActualWidth;
r.Height = item.ActualHeight;
r.Margin = new System.Windows.Thickness(item.AbsoluteLocation.X, item.AbsoluteLocation.Y, 0, 0);
dragCanvas.Children.Add(r);
}
// create drag adorner
if (diagramDesigner != 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;
}
