Vista - Why can't I use TemplateBinding in Setter?

Hi~~~

I want to use some TemplateBinding in a setter of ControlTemplate's
Triggers.
But the runtime throwed the exception to warn me I can't do that.


<Style x:Key="{x:Type local:BitmapButton}" TargetType="{x:Type
local:BitmapButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:BitmapButton}">
<Grid x:Name="Grid" RenderTransformOrigin="0.5,0.5">
.... etc
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Source"
Value="{TemplateBinding
local:BitmapButton.ImageDefault}"
^^^^^^^^^^^^^^^^^^^^^^
TargetName="Image"/>

Why I can't use TemplateBinding in Setters?

So I change the way and write triggers on C# code.
In OnApplyTemplate() function

Trigger newTrigger = new Trigger();
newTrigger.Property = BitmapButton.IsMouseOverProperty;
newTrigger.Value = true;
Setter setter1 = new Setter(Image.SourceProperty, new
BitmapImage(...etc);
newTrigger.Setters.Add(setter1);
this.Triggers.Add(newTrigger);

But I got a exception that only EventTrigger can be added
into Button.Triggers.

Could anyone suggest other ways to implement that?
Thanks

have a nice day


HolaMan

Have you tried {Binding} instead of {TemplateBinding}? I honestly don't
know if that works, you may not inherit the DataContext into that place.
But as for Binding vs. TemplateBinding, TemplateBinding is intended as a
subset of Binding, created for a few specific scenarios we knew how to
optimize specially.

-Nick Kramer [MSFT]

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"HolaMan" <reality.chang@gmail.com> wrote in message
news:1144753729.285998.87760@z34g2000cwc.googlegroups.com...
> Hi~~~
>
> I want to use some TemplateBinding in a setter of ControlTemplate's
> Triggers.
> But the runtime throwed the exception to warn me I can't do that.
>
>
> <Style x:Key="{x:Type local:BitmapButton}" TargetType="{x:Type
> local:BitmapButton}">
> <Setter Property="Template">
> <Setter.Value>
> <ControlTemplate TargetType="{x:Type local:BitmapButton}">
> <Grid x:Name="Grid" RenderTransformOrigin="0.5,0.5">
> .... etc
> <ControlTemplate.Triggers>
> <Trigger Property="IsMouseOver" Value="True">
> <Setter Property="Source"
> Value="{TemplateBinding
> local:BitmapButton.ImageDefault}"
> ^^^^^^^^^^^^^^^^^^^^^^
> TargetName="Image"/>
>
> Why I can't use TemplateBinding in Setters?
>
> So I change the way and write triggers on C# code.
> In OnApplyTemplate() function
>
> Trigger newTrigger = new Trigger();
> newTrigger.Property = BitmapButton.IsMouseOverProperty;
> newTrigger.Value = true;
> Setter setter1 = new Setter(Image.SourceProperty, new
> BitmapImage(...etc);
> newTrigger.Setters.Add(setter1);
> this.Triggers.Add(newTrigger);
>
> But I got a exception that only EventTrigger can be added
> into Button.Triggers.
>
> Could anyone suggest other ways to implement that?
> Thanks
>
> have a nice day
>
>
> HolaMan
>

Thanks for your reply.

But It seems that Binding doesn't work either.

<local:MyImageSourceConverter x:Key="ImgConverter"/>

<Style TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid>
<StackPanel>
<TextBlock x:Name="tb" Text="Test"/>
<Image Source="{TemplateBinding Button.Content,
Converter={StaticResource ImgConverter}}"/>
<Rectangle Width="100" Height="100" x:Name="RR">
<Rectangle.Fill>
<ImageBrush x:Name="Test"
ImageSource="d:\\p1.jpg"/>
</Rectangle.Fill>
</Rectangle>
</StackPanel>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Text" Value="{Binding
Path=Content}" TargetName="tb"/>

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

But I found I can use a strange way to do that. Set a collapsed
object(in order not to affect the final result) outside to
templatebinding
and use Binding's "ElementName" to bind the value.

<Style TargetType="{x:Type Button}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid>
<StackPanel>
<TextBlock x:Name="tb2" Text="{TemplateBinding
Button.Content}" Visibility="Collapsed"/>

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Collapsed Object but TemplateBinding
<TextBlock x:Name="tb" Text="Test"/>
<Image Source="{TemplateBinding Button.Content,
Converter={StaticResource ImgConverter}}"/>
<Rectangle Width="100" Height="100" x:Name="RR">
<Rectangle.Fill>
<ImageBrush x:Name="Test"
ImageSource="d:\\p1.jpg"/>
</Rectangle.Fill>
</Rectangle>
</StackPanel>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Rectangle.Fill" Value="{Binding
Path=Text, ElementName=tb2, Converter={StaticResource ImgConverter}}"
TargetName="RR"/>


^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Binding to Collapsed Properties
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>


Or if I miss some easier method or syntax to do the same thing?
Thanks

Have a nice day

HolaMan