本文整理汇总了C#中System.Windows.Media.PathGeometry.ReadLocalValue方法的典型用法代码示例。如果您正苦于以下问题：C# PathGeometry.ReadLocalValue方法的具体用法？C# PathGeometry.ReadLocalValue怎么用？C# PathGeometry.ReadLocalValue使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Media.PathGeometry的用法示例。
在下文中一共展示了PathGeometry.ReadLocalValue方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: PathGeometryHasFigures
// This is needed in Silverlight because of a Silverlight bug
// that causes a Path with a PathGeometry that was created using
// <Path ... Data="M0 0 L10 20 ..." />
// to have ZERO Bounds after trying to access the PathGeometry.Figures property.
//
// In both WPF and Silverlight Paths constructed using the Path markup syntax
// using the StreamGeometry mini-language are supposed to be "black boxes".
// There is no way to walk the PathGeometry.Figures to determine its actual geometry.
// One can only get the PathGeometry.Bounds.
// We have to treat it as a rectangular shape.
// Note: Silverlight does not support the PathFigureCollection mini-language.
// (Example: <PathGeometry Figures="M0 0 L10 20 ..." />.)
// WPF supports both the StreamGeometry mini-language and the PathFigureCollection mini-language.
//
// So if the programmer wants to use a Node containing Paths for which Links want to
// connect at the edge of the Paths (when Spot.None, of course),
// they have to construct a PathFigureCollection containing PathFigures.
//
// But in Silverlight there is a bug causing the PathGeometry to have zero Bounds
// once our code tries to get the value of PathGeometry.Figures,
// if the Path was defined in XAML.
// This causes that Path to disappear, to the consternation of our customers.
// Typically that happenened (before version 1.2.6f) when routing a link to a node
// containing a Path defined in XAML, when the Spot was None and no surrounding
// Panel with a Background hid the actual shape of the Path.
//
// Our work-around requires our code to construct each PathGeometry with an
// explicitly created PathFigureCollection containing PathFigures.
// Explicitly setting PathGeometry.Figures gives it a local value which
// tells this predicate that it's OK to try to get the PathGeometry.Figures property.
// If it hasn't been set, it won't have a local value, which means
// (most likely) that it was created in XAML using Data="...".
public static bool PathGeometryHasFigures(PathGeometry path) {
object val = path.ReadLocalValue(PathGeometry.FiguresProperty);
var pfc = val as PathFigureCollection;
return pfc != null && pfc.Count > 0;
}