[英]Why can't I define a Geometry with a Transform in XAML?
I am trying to create a ResourceDictionary
á la this answer that contains StreamGeometries
that have Transforms
set: 我正在尝试创建一个
ResourceDictionary
这个答案包含具有Transforms
集的StreamGeometries
:
<ResourceDictionary>
<StreamGeometry x:Name="Chevrons">
<StreamGeometry.Transform>
<TranslateTransform X="20" Y="120"/>
</StreamGeometry.Transform>
M21.750001,94.749999 L34.000002,117.66218 30.625003,133.62501 17 [...]
</StreamGeometry>
</ResourceDictionary>
However, I get the following error: 但是,我收到以下错误:
1: Cannot add content to an object of type "StreamGeometry".
1:无法向“StreamGeometry”类型的对象添加内容。
and 和
2: TypeConverter syntax error encountered while processing initialization string ' {PathData} '.
2:处理初始化字符串' {PathData} '时遇到TypeConverter语法错误。 Element attributes are not allowed on objects created via TypeConverter.
通过TypeConverter创建的对象不允许使用元素属性。
So I tried it with a PathGeometry
and got this error: 所以我用
PathGeometry
尝试了它并得到了这个错误:
The specified value cannot be assigned to the collection.
无法将指定的值分配给集合。 The following type was expected: "PathFigure".
预期以下类型:“PathFigure”。
Is there any way to do apply a transform to a Geometry in XAML code? 有没有办法在XAML代码中将变换应用于几何? Or do I just have to do it via code?
或者我只需要通过代码来完成它?
You may write it like this: 你可以这样写:
<PathGeometry x:Key="Chevrons">
<PathGeometry.Transform>
<TranslateTransform X="20" Y="120"/>
</PathGeometry.Transform>
<PathGeometry.Figures>
M21.750001,94.749999 L34.000002,117.66218 30.625003,133.62501 ...
</PathGeometry.Figures>
</PathGeometry>
or like this: 或者像这样:
<PathGeometry x:Key="Chevrons"
Figures="M21.750001,94.749999 L34.000002,117.66218 30.625003,133.62501 ...">
<PathGeometry.Transform>
<TranslateTransform X="20" Y="120"/>
</PathGeometry.Transform>
</PathGeometry>
About the behavior of StreamGeometry
, quote from MSDN
: 关于
StreamGeometry
的行为,引自MSDN
:
Here: 这里:
A StreamGeometry is a Freezable type.
StreamGeometry是Freezable类型。 StreamGeometry is light-weight alternative to PathGeometry for creating geometric shapes.
StreamGeometry是PathGeometry的轻量级替代品,用于创建几何形状。 Use a StreamGeometry when you need to describe a complex geometry but do not want the overhead of supporting data binding, animation, or modification.
当您需要描述复杂几何体但不希望支持数据绑定,动画或修改的开销时,请使用StreamGeometry。 Because of its efficiency, the StreamGeometry class is a good choice for describing adorners.
由于其效率,StreamGeometry类是描述装饰者的不错选择。
And here: 和这里:
A StreamGeometry cannot be serialized if it contains a Transform or any non-stroked or unfilled segments.
如果StreamGeometry包含Transform或任何非描边或未填充的段,则无法序列化。
Therefore, use the PathGeomerty
, as advised @Clemens. 因此,请使用
PathGeomerty
,如@Clemens所建议的那样。
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