如何在WPF中缩放图形？

Question

我在<Canvas> </Canvas>中放置了一些图形,例如一些Elipse,Rectangle,Path等，那么如何让这些图形 进行按比例放大缩小呢？最好以鼠标所在位置为基点，就好比在Microsoft Expresson Blend3 中 利用鼠标滚轮对图形界面进行缩放的效果一样（还有CAD ，Protell 里面的缩放）。我看书上利用ScaleTransform 能进行缩放，但假如在<Canvas> </Canvas>里面有很多图形，对每个图形都用ScaleTransform 就有点麻烦了。请问大神们 通过什么方法能实现缩放功能啊？

Answer 1

你要想对每个图像都缩放，那你直接缩放Canvas就好了啊

<Canvas Canvas.Left="53" Canvas.Top="60" Height="110" Width="240">

    <Canvas.LayoutTransform>

        <ScaleTransform ScaleX="2" ScaleY="2" CenterX=".5" CenterY=".5" />

    </Canvas.LayoutTransform>

</Canvas>

 

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Sheldon _Xiao[MSFT]
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Answer 2

或者, 用缩放控件:

• ZoomableCanvas: http://blogs.msdn.com/b/kaelr/archive/2010/07/29/zoomablecanvas.aspx
• 介绍: http://blogs.msdn.com/b/wpf/archive/2010/08/12/wpf-zoomablecanvas-with-a-million-items-from-kael-rowan.aspx

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Bob Bao [MSFT]
MSDN Community Support | Feedback to us
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Answer 3

谢谢两位版主的帮助。