protected virtual void SelectLassoComponents(Rectangle lasso)//TODO: make hit test strategy pluggable
{
double left = lasso.GetValue <double>(Canvas.LeftProperty);
double top = lasso.GetValue <double>(Canvas.TopProperty);
double width = lasso.Width;
double height = lasso.Height;
Rect r = new Rect(left, top, width, height);
List <IDesignableControl> selection = new List <IDesignableControl>();
foreach (var u in LayoutRoot.Children)
{
if (u is IDesignableControl)
{
IDesignableControl test = (IDesignableControl)u;
Point[] corners = test.Visual.GetCanvasCorners();
for (int i = 0; i < corners.Length; ++i)
{
if (r.Contains(corners[i]))
{
selection.Add(test);
break;
}
}
}
}
SelectionSvc.Select(selection);
}
private void LayoutRoot_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
SelectionSvc.Select(null);
_isSelecting = true;
SelectDrawingBehavior = new RectangleDrawingBehavior(LayoutRoot);
LayoutRoot.CaptureMouse();
_localMousePos = e.GetPosition(this);
_selectingRect = (Rectangle)SelectDrawingBehavior.StartDrawing(_localMousePos);
}
/// <summary>
/// Get left,top, width,height of the entirety of all selected components
/// </summary>
/// <returns></returns>
public virtual Rect GetSelectionBounds()
{
double left, top, width, height;
left = int.MaxValue;
top = int.MaxValue;
width = 0.0;
height = 0.0;
IList <IDesignableControl> selection = SelectionSvc.GetSelection();
foreach (var idt in selection)
{
double l = idt.Visual.GetValue <double>(Canvas.LeftProperty);
double t = idt.Visual.GetValue <double>(Canvas.TopProperty);
if (l < left)
{
left = l;
}
if (t < top)
{
top = t;
}
}
foreach (var idt in selection)
{
double l = idt.Visual.GetValue <double>(Canvas.LeftProperty);
double t = idt.Visual.GetValue <double>(Canvas.TopProperty);
//Using RenderSize takes transforms into account
double w = idt.Visual.RenderSize.Width;
double h = idt.Visual.RenderSize.Height;
if (l + w > width)
{
width = l + w - left;
}
if (t + h > height)
{
height = t + h - top;
}
}
Rect r = new Rect(left, top, width, height);
return(r);
}