internal void SetWindowPosition(ExtensionWindow window, Point position)
{
Func <double, double, double, double, double> CalculateInBoundsValue =
(pos, size, limit, modifier) =>
{
if (this.AutoExpandCanvas)
{
return(pos - modifier);
}
else
{
pos = Math.Max(0.0, pos);
return(pos + size > limit ? limit - size : pos);
}
};
//in case of AutoExpandCanvas == false:
// - do not allow placing window outside surface bounds
//in case of AutoExpandCanvas == true:
// - include possible negative canvas offset
position.X = CalculateInBoundsValue(position.X, window.DesiredSize.Width, this.ActualWidth, this.selectedChild.Value.X);
position.Y = CalculateInBoundsValue(position.Y, window.DesiredSize.Height, this.ActualHeight, this.selectedChild.Value.Y);
//update its position on canvas
ExtensionSurface.SetPosition(window, position);
bool requiresMeasure = false;
if (this.AutoExpandCanvas)
{
requiresMeasure = true;
this.canvasOffset.X = 0;
this.canvasOffset.Y = 0;
foreach (UIElement item in this.Children)
{
FrameworkElement child = item as FrameworkElement;
if (null != child)
{
Point p = ExtensionSurface.GetPosition(child);
this.canvasOffset.X = Math.Min(this.canvasOffset.X, p.X);
this.canvasOffset.Y = Math.Min(this.canvasOffset.Y, p.Y);
}
}
this.canvasOffset.X = Math.Abs(this.canvasOffset.X);
this.canvasOffset.Y = Math.Abs(this.canvasOffset.Y);
}
if (requiresMeasure)
{
this.InvalidateMeasure();
}
else
{
this.InvalidateArrange();
}
}
private void UpdateRubberBand()
{
if (this.ExtenstionSurface.Children.Contains(this.rubberBand))
{
// Transform the start and end points to be relative to the extension surface by transforming to the common ancestor (DesignerView) first
GeneralTransform transform1 = this.Designer.scrollableContent.TransformToAncestor(this.Designer);
GeneralTransform transform2 = this.Designer.TransformToDescendant(this.ExtenstionSurface);
Point start = ClipPoint(transform2.Transform(transform1.Transform(this.StartPoint)));
Point end = ClipPoint(transform2.Transform(transform1.Transform(this.EndPoint)));
Rect rect = new Rect(start, end);
this.rubberBand.Width = rect.Width;
this.rubberBand.Height = rect.Height;
this.rubberBand.InvalidateVisual();
ExtensionSurface.SetPosition(this.rubberBand, rect.TopLeft);
}
else
{
Fx.Assert(false, "Rubber band was not correctly added.");
}
}
