protected override void OnPreviewMouseUp(MouseButtonEventArgs e)
{
if (IsMouseCaptured)
{
ReleaseMouseCapture();
}
var adornerLayer = AdornerLayer.GetAdornerLayer(_itemsPanel);
adornerLayer?.Remove(this);
if (_drawableInstance == null)
{
return;
}
_drawableInstance.Y2 = _endPoint.Value.Y;
_drawableInstance.X2 = _endPoint.Value.X;
_drawableInstance.Left = Math.Min(_drawableInstance.X1,
_drawableInstance.X2);
_drawableInstance.Top = Math.Min(_drawableInstance.Y1,
_drawableInstance.Y2);
var width = Math.Abs(_drawableInstance.X1 - _drawableInstance.X2);
var height = Math.Abs(_drawableInstance.Y1 - _drawableInstance.Y2);
CreateDrawableInstance(width, height);
_designerPanel.AddItem(_drawableInstance);
_designerPanel.SelectionService.SelectItem(_drawableInstance);
e.Handled = true;
}
private static void OnDesignerDrop(object sender, DragEventArgs e)
{
if (e.Data.GetData(typeof(DragObject)) is DragObject dragObject &&
dragObject.DataContextType !=
null)
{
if (Activator.CreateInstance(dragObject.DataContextType) is IDesignerItem element)
{
Point position = e.GetPosition(_itemsPanel);
element.Parent = _designerViewModel;
element.ZIndex = _designerViewModel.Items.Count;
element.TransformOrigin = new Point(0.5, 0.5);
element.MinHeight = 10;
element.MinWidth = 10;
if (dragObject.DesiredSize.HasValue)
{
Size desiredSize = dragObject.DesiredSize.Value;
element.Width = desiredSize.Width;
element.Height = desiredSize.Height;
element.Left = Math.Max(0,
position.X -
element.Width /
2);
element.Top = Math.Max(0,
position.Y -
element.Height /
2);
}
else
{
element.Left = Math.Max(0, position.X);
element.Top = Math.Max(0, position.Y);
}
_designerViewModel.AddItem(element);
_designerViewModel.SelectionService.SelectItem(element);
}
}
e.Handled = true;
}