TemplateBinding 在某些情况下不起作用(使用 TranslateTransform 时)
这就是我在 WPF 中重现此问题的方法:
创建自定义控件:
public class TestCustomControl : Control
{
static TestCustomControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(TestCustomControl), new FrameworkPropertyMetadata(typeof(TestCustomControl)));
}
public string Text
{
get { return (string)GetValue(TextProperty); }
set { SetValue(TextProperty, value); }
}
// Using a DependencyProperty as the backing store for Text. This enables animation, styling, binding, etc...
public static readonly DependencyProperty TextProperty =
DependencyProperty.Register("Text", typeof(string), typeof(TestCustomControl), new PropertyMetadata("Hello"));
public double OffSet
{
get { return (double)GetValue(OffSetProperty); }
set { SetValue(OffSetProperty, value); }
}
// Using a DependencyProperty as the backing store for OffSet. This enables animation, styling, binding, etc...
public static readonly DependencyProperty OffSetProperty =
DependencyProperty.Register("OffSet", typeof(double), typeof(TestCustomControl), new PropertyMetadata(5.0));
}
在 Generic.xaml 文件中为其添加样式:
<Style TargetType="local:TestCustomControl">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:TestCustomControl">
<Grid>
<TextBlock Text="{TemplateBinding Text}"></TextBlock>
<TextBlock Text="{TemplateBinding Text}">
<TextBlock.RenderTransform>
<TranslateTransform X="{TemplateBinding OffSet}" Y="{TemplateBinding OffSet}"/>
<!--<TranslateTransform X="10" Y="10"/>-->
</TextBlock.RenderTransform>
</TextBlock>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
然后将其添加到主窗口:
<local:TestCustomControl OffSet="32" Text="the off set is not working" FontSize="36">
</local:TestCustomControl>
然后运行应用程序,结果发现“Text”工作正常,但“OffSet”不起作用。 我在Windows Phone 7开发环境中尝试了类似的事情,得到了相同的结果。
我应该如何修改代码才能使 OffSet 工作?
谢谢
This is how I reproduced this problem in WPF:
Create a custom control:
public class TestCustomControl : Control
{
static TestCustomControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(TestCustomControl), new FrameworkPropertyMetadata(typeof(TestCustomControl)));
}
public string Text
{
get { return (string)GetValue(TextProperty); }
set { SetValue(TextProperty, value); }
}
// Using a DependencyProperty as the backing store for Text. This enables animation, styling, binding, etc...
public static readonly DependencyProperty TextProperty =
DependencyProperty.Register("Text", typeof(string), typeof(TestCustomControl), new PropertyMetadata("Hello"));
public double OffSet
{
get { return (double)GetValue(OffSetProperty); }
set { SetValue(OffSetProperty, value); }
}
// Using a DependencyProperty as the backing store for OffSet. This enables animation, styling, binding, etc...
public static readonly DependencyProperty OffSetProperty =
DependencyProperty.Register("OffSet", typeof(double), typeof(TestCustomControl), new PropertyMetadata(5.0));
}
Add a style for it in the Generic.xaml file:
<Style TargetType="local:TestCustomControl">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:TestCustomControl">
<Grid>
<TextBlock Text="{TemplateBinding Text}"></TextBlock>
<TextBlock Text="{TemplateBinding Text}">
<TextBlock.RenderTransform>
<TranslateTransform X="{TemplateBinding OffSet}" Y="{TemplateBinding OffSet}"/>
<!--<TranslateTransform X="10" Y="10"/>-->
</TextBlock.RenderTransform>
</TextBlock>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
Then add it to the main window:
<local:TestCustomControl OffSet="32" Text="the off set is not working" FontSize="36">
</local:TestCustomControl>
Then run the application, it turned out the "Text" works fine but the "OffSet" does not work.
And I tried the similar thing in Windows Phone 7 development environment, and I got the same result.
How should I modify the code to make the OffSet work?
Thanks
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尝试:
Try:
TemplateBing 和RelativeSource 都不起作用,所以如果您的目标是WP7.0 (Silverlight 3),请忽略它。
使用一些其他方法来解决这个问题。
实际上,每次更改“OffSet”时,我都会手动更改每个变换的 X/Y 值。
Both of TemplateBing and RelativeSource do not work, so just forget about it if you are targeting WP7.0 (Silverlight 3).
Use some other ways to work it around.
I actually manually changed the X/Y values of each transform every time the "OffSet" is changed.