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>
/// 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>
/// 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>
/// Draw the rubberband.
/// </summary>
/// <param name="e"></param>
/// <param name="control"></param>
public static void DrawOnMouseMove(MouseEventArgs e, DiagramDesignerCanvas control)
{
if (IgnoreRubberbandSelectionOnce)
{
IgnoreRubberbandSelectionOnce = false;
CancelRubberbandSelection();
return;
}
if (RubberbandSelectionStartPoint.HasValue)
{
// if mouse button is not pressed we have no drag operation, ...
if (e.LeftButton != MouseButtonState.Pressed)
RubberbandSelectionStartPoint = null;
// ... but if mouse button is pressed and start
// point value is set we do have one
else
{
Point pCurrent = e.GetPosition(control);
if (Math.Abs(pCurrent.X - RubberbandSelectionStartPoint.Value.X) > 5 ||
Math.Abs(pCurrent.Y - RubberbandSelectionStartPoint.Value.Y) > 5)
{
// create rubberband adorner
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(control);
if (adornerLayer != null)
{
DiagramDesignerRubberbandAdorner adorner = new DiagramDesignerRubberbandAdorner(control, RubberbandSelectionStartPoint);
if (adorner != null)
{
adornerLayer.Add(adorner);
}
}
}
}
}
}
/// <summary>
/// Draw the rubberband.
/// </summary>
/// <param name="e"></param>
/// <param name="control"></param>
public static void DrawOnMouseMove(MouseEventArgs e, DiagramDesignerCanvas control)
{
if (IgnoreRubberbandSelectionOnce)
{
IgnoreRubberbandSelectionOnce = false;
CancelRubberbandSelection();
return;
}
if (RubberbandSelectionStartPoint.HasValue)
{
// if mouse button is not pressed we have no drag operation, ...
if (e.LeftButton != MouseButtonState.Pressed)
{
RubberbandSelectionStartPoint = null;
}
// ... but if mouse button is pressed and start
// point value is set we do have one
else
{
Point pCurrent = e.GetPosition(control);
if (Math.Abs(pCurrent.X - RubberbandSelectionStartPoint.Value.X) > 5 ||
Math.Abs(pCurrent.Y - RubberbandSelectionStartPoint.Value.Y) > 5)
{
// create rubberband adorner
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(control);
if (adornerLayer != null)
{
DiagramDesignerRubberbandAdorner adorner = new DiagramDesignerRubberbandAdorner(control, RubberbandSelectionStartPoint);
if (adorner != null)
{
adornerLayer.Add(adorner);
}
}
}
}
}
}
/// <summary>
/// Dragging has ended, see if VM is IDiagramDesignerItem and notify of moving end.
/// </summary>
void DragThumb_DragCompleted(object sender, DragCompletedEventArgs e)
{
if (!dragStarted)
{
return;
}
else
{
dragStarted = false;
}
DiagramItemsMovementInfo movementInfo = diagramDesignerVM.CalcMovementInfo(this.selectedItemsVM, e.HorizontalChange, e.VerticalChange);
diagramDesignerVM.MoveElements(selectedItemsVM, movementInfo);
List <DiagramDesignerCanvas> selectionParentCanvases = new List <DiagramDesignerCanvas>();
foreach (DiagramDesignerItem item in selectedItems)
{
/*
* IDiagramItemViewModel designerItem = item.DataContext as IDiagramItemViewModel;
* if (designerItem == null)
* continue;
*
* // apply change
* double left = designerItem.Left + dragAdorner.LeftOffset;
* double top = designerItem.Top + dragAdorner.TopOffset;
* designerItem.Location = new PointD(left, top);
*/
DiagramDesignerCanvas canvas = (item as DiagramDesignerItem).ParentCanvas;
if (canvas != null)
{
if (!selectionParentCanvases.Contains(canvas))
{
selectionParentCanvases.Add(canvas);
}
}
}
// update diagram surfaces
foreach (DiagramDesignerCanvas canvas in selectionParentCanvases)
{
if (canvas != null)
{
canvas.InvalidateMeasure();
}
}
// remove drag adorner
if (this.IsMouseCaptured)
{
this.ReleaseMouseCapture();
}
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this.diagramDesigner);
if (adornerLayer != null)
{
adornerLayer.Remove(this.dragAdorner);
}
e.Handled = false;
}
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);
}
}
}
}