protected void EndDrawing()
{
if (TargetObject != null)
{
if (TargetObject.Nodes.Count < 2)
{
if (TargetObject.Parent is Canvas)
{
(TargetObject.Parent as Canvas).Children.Remove(TargetObject);
}
}
else
if (ObjectCreated != null)
{
ObjectCreated(this, new EventArgs());
}
TargetObject = null;
}
if ((GuideLine != null) && (GuideLine.Parent is Canvas))
{
(GuideLine.Parent as Canvas).Children.Remove(GuideLine);
GuideLine = null;
}
IsDrawing = false;
}
protected void StartDrawing(Canvas drawingCanvas)
{
if (drawingCanvas == null)
{
return;
}
IsDrawing = true;
if (TargetObject == null)
{
TargetObject = CreateNewObject();
drawingCanvas.Children.Add(TargetObject);
}
if (GuideLine == null)
{
GuideLine = new DDPenGuideLine();
if (TargetObject.Nodes.Count > 0)
{
GuideLine.StartPoint = TargetObject.Nodes.Last.Point.Point;
GuideLine.EndPoint = TargetObject.Nodes.Last.Point.Point;
}
drawingCanvas.Children.Add(GuideLine);
}
}
private static void AnyPropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs args)
{
DDPenGuideLine sender = (DDPenGuideLine)d;
sender.InvalidateVisual();
}
