/// <summary>
/// Dragging has ended, see if VM is IDiagramDesignerItem and notify of resizing end.
/// </summary>
void ResizeThumb_DragCompleted(object sender, DragCompletedEventArgs e)
{
if (!dragStarted)
{
return;
}
else
{
dragStarted = false;
}
DiagramItemsResizeInfo resizeInfo = diagramDesignerVM.CalcResizeInfo(this.selectedItemsVM, e.HorizontalChange, e.VerticalChange, direction.Value);
diagramDesignerVM.ResizeElements(this.selectedItemsVM, resizeInfo);
// remove drag adorner
if (this.IsMouseCaptured)
{
this.ReleaseMouseCapture();
}
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this.diagramDesigner);
if (adornerLayer != null)
{
adornerLayer.Remove(this.dragAdorner);
}
e.Handled = false;
}
/// <summary>
/// Resize item(s).
/// </summary>
void ResizeThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
if (!dragStarted)
{
if (Math.Abs(e.HorizontalChange) >= MinDistanceToStart || Math.Abs(e.VerticalChange) >= MinDistanceToStart)
{
Start();
dragStarted = true;
}
}
if (dragStarted)
{
if (diagramDesignerVM == null)
{
return;
}
// update position of the drag adorner
DiagramItemsResizeInfo resizeInfo = diagramDesignerVM.CalcResizeInfo(this.selectedItemsVM, e.HorizontalChange, e.VerticalChange, direction.Value);
if (selectedItemsVM.Count != dragCanvas.Children.Count)
{
return;
}
for (int i = 0; i < selectedItemsVM.Count; i++)
{
FrameworkElement elem = dragCanvas.Children[i] as FrameworkElement;
if (elem != null)
{
elem.Margin = new System.Windows.Thickness(
selectedItemsVM[i].AbsoluteLocation.X + resizeInfo.LeftChange,
selectedItemsVM[i].AbsoluteLocation.Y + resizeInfo.TopChange, 0, 0);
elem.Width = selectedItemsVM[i].Width + resizeInfo.WidthChange;
elem.Height = selectedItemsVM[i].Height + resizeInfo.HeightChange;
}
}
// update adorned element
this.dragAdorner.Update();
}
}
