在Metro Style应用上计算ViewBox ScaleFactor

本文介绍了在Metro Style应用上计算ViewBox ScaleFactor的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

是否可以通过任何方式获取ViewBox在XAML Windows 8 Metro Style应用中缩放其内容的比例因子

Is there any way to get the scale factor by which a ViewBox scales its content in a XAML Windows 8 Metro Style App

推荐答案

public static double GetChildScaleX(this Viewbox viewbox)
{
    if (viewbox.Child == null)
        throw new InvalidOperationException("Can't tell effective scale of a Viewbox child for a Viewbox with no child.");

    var fe = viewbox.Child as FrameworkElement;

    if (fe == null)
        throw new InvalidOperationException("Can't tell effective scale of a Viewbox child for a Viewbox with a child that is not a FrameworkElement.");

    if (fe.ActualWidth == 0)
        throw new InvalidOperationException("Can't tell effective scale of a Viewbox child for a Viewbox with a child that is not laid out.");

    return viewbox.ActualWidth / fe.ActualWidth;
}

GetChildScaleY相同，但具有高度.

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