public static void Draw(this Canvas canvas, DrawRecord record)
{
if (History == null)
{
History = new Dictionary <Canvas, Stack <int> >();
}
Stack <int> history = null;
if (History.ContainsKey(canvas))
{
history = History[canvas];
}
else
{
history = new Stack <int>();
History.Add(canvas, history);
}
var element = record.GetElement();
if (element == null)
{
return;
}
history.Push(canvas.Children.Add(element));
GC.Collect();
}
/// <summary>
/// 绘制图形
/// </summary>
/// <param name="record"></param>
public void Draw(DrawRecord record)
{
var element = record.GetElement();
if (element == null)
{
return;
}
if (History.Any(item => item.Equals(element)))
{
return;
}
Children.Add(element);
History.Push(element);
GC.Collect();
}