WPF 使用Trigger遇到的问题

<TextBlock Text="AAA" Foreground="Black" >
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Foreground" Value="Orange"></Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Foreground" Value="Red"></Setter>
</Trigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>

<!--使用了Object和MouseOverObject两个对象，是为了处理图片的切换，比如美工针对鼠标进入和离开两种场景提供了两张图片，Header也类似，以及其他场景，如下：-->

<localControls:IconButton Height="" Width="" HeaderWidth="*"
Icon="MMM" MouseOverForeground="White" MouseOverBackground="Black">
<localControls:IconButton.Header>
<Border>
<TextBlock Text="asdfasdf"></TextBlock>
</Border>
</localControls:IconButton.Header>
<localControls:IconButton.MouseOverHeader>
<TextBlock Foreground="Orange" Text="MouseONver"></TextBlock>
</localControls:IconButton.MouseOverHeader>
</localControls:IconButton>

<Style x:Key="IconButtonStyle" TargetType="{x:Type localControls:IconButton}">
<!--Foreground这个属性，如果直接在IconButton对象上设置Foreground默认值，将导致Trigger无效，所以添加了NormalForeground-->
<Setter Property="NormalBackground" Value="Gray"></Setter>
<Setter Property="NormalForeground" Value="Black"></Setter>
<Setter Property="MouseOverBackground" Value="{Binding NormalBackground, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="MouseOverForeground" Value="{Binding NormalForeground, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="MouseOverIcon" Value="{Binding Icon, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="MouseOverHeader" Value="{Binding Header, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="DisabledBackground" Value="{Binding NormalBackground, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="DisabledForeground" Value="{Binding NormalForeground, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="DisabledIcon" Value="{Binding Icon, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="DisabledHeader" Value="{Binding Header, RelativeSource={RelativeSource Self}}"></Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type localControls:IconButton}">
<Border x:Name="TemplateRoot" Background="{TemplateBinding NormalBackground}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="{TemplateBinding IconWidth}"></ColumnDefinition>
<ColumnDefinition Width="{TemplateBinding HeaderWidth}"></ColumnDefinition>
</Grid.ColumnDefinitions>
<ContentPresenter x:Name="IconContentSite"
Content="{TemplateBinding Icon}"
Margin="{TemplateBinding IconMargin}"
HorizontalAlignment="{TemplateBinding IconHorizontalAlignment}"
VerticalAlignment="{TemplateBinding IconVerticalAlignment}"></ContentPresenter>
<ContentPresenter x:Name="HeaderContentSite" Grid.Column=""
Margin="{TemplateBinding HeaderMargin}"
HorizontalAlignment="{TemplateBinding HeaderHorizontalAlignment}"
VerticalAlignment="{TemplateBinding HeaderVerticalAlignment}"
Content="{TemplateBinding Header}"></ContentPresenter> </Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="IconContentSite" Property="Content" Value="{Binding MouseOverIcon,RelativeSource={RelativeSource TemplatedParent}}"></Setter>
<Setter TargetName="HeaderContentSite" Property="Content" Value="{Binding MouseOverHeader,RelativeSource={RelativeSource TemplatedParent}}"></Setter>
<Setter TargetName="TemplateRoot" Property="Background" Value="{Binding MouseOverBackground,RelativeSource={RelativeSource TemplatedParent}}"></Setter>
<!--因为是要设置IconButton的依赖属性值，所以不设置TargetName，并且Model为Self，如果为TemplateParent，将无法绑定到目标值，具体原因看MSDN关于此枚举的介绍-->
<Setter Property="Foreground" Value="{Binding MouseOverForeground,RelativeSource={RelativeSource Self}}"></Setter>
</Trigger>
<Trigger Property="IsMouseOver" Value="false">
<Setter Property="Foreground" Value="{Binding NormalForeground,RelativeSource={RelativeSource Self}}"></Setter>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="IconContentSite" Property="Content" Value="{Binding DisabledIcon,RelativeSource={RelativeSource TemplatedParent}}"></Setter>
<Setter TargetName="HeaderContentSite" Property="Content" Value="{Binding DisabledHeader,RelativeSource={RelativeSource TemplatedParent}}"></Setter>
<Setter TargetName="TemplateRoot" Property="Background" Value="{Binding DisabledBackground,RelativeSource={RelativeSource TemplatedParent}}"></Setter>
<Setter Property="Foreground" Value="{Binding DisabledForeground,RelativeSource={RelativeSource Self}}"></Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

public class IconButton : Control
{
public IconButton()
{
} #region DependencyProperty
public object Icon
{
get { return (object)GetValue(IconProperty); }
set { SetValue(IconProperty, value); }
} // Using a DependencyProperty as the backing store for Icon. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IconProperty =
DependencyProperty.Register("Icon", typeof(object), typeof(IconButton), new PropertyMetadata(null)); public Thickness IconMargin
{
get { return (Thickness)GetValue(IconMarginProperty); }
set { SetValue(IconMarginProperty, value); }
} // Using a DependencyProperty as the backing store for IconMargin. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IconMarginProperty =
DependencyProperty.Register("IconMargin", typeof(Thickness), typeof(IconButton), new PropertyMetadata(new Thickness(0d))); public GridLength IconWidth
{
get { return (GridLength)GetValue(IconWidthProperty); }
set { SetValue(IconWidthProperty, value); }
} // Using a DependencyProperty as the backing store for IconWidth. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IconWidthProperty =
DependencyProperty.Register("IconWidth", typeof(GridLength), typeof(IconButton), new PropertyMetadata(GridLength.Auto)); public HorizontalAlignment IconHorizontalAlignment
{
get { return (HorizontalAlignment)GetValue(IconHorizontalAlignmentProperty); }
set { SetValue(IconHorizontalAlignmentProperty, value); }
} // Using a DependencyProperty as the backing store for IconHorizontalAlignment. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IconHorizontalAlignmentProperty =
DependencyProperty.Register("IconHorizontalAlignment", typeof(HorizontalAlignment), typeof(IconButton), new PropertyMetadata(HorizontalAlignment.Center)); public VerticalAlignment IconVerticalAlignment
{
get { return (VerticalAlignment)GetValue(IconVerticalAlignmentProperty); }
set { SetValue(IconVerticalAlignmentProperty, value); }
} // Using a DependencyProperty as the backing store for IconVerticalAlignment. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IconVerticalAlignmentProperty =
DependencyProperty.Register("IconVerticalAlignment", typeof(VerticalAlignment), typeof(IconButton), new PropertyMetadata(VerticalAlignment.Center)); public object MouseOverIcon
{
get { return (object)GetValue(MouseOverIconProperty); }
set { SetValue(MouseOverIconProperty, value); }
} // Using a DependencyProperty as the backing store for MouseOverIcon. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MouseOverIconProperty =
DependencyProperty.Register("MouseOverIcon", typeof(object), typeof(IconButton), new PropertyMetadata(null)); public object DisabledIcon
{
get { return (object)GetValue(DisabledIconProperty); }
set { SetValue(DisabledIconProperty, value); }
} // Using a DependencyProperty as the backing store for DisabledIcon. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DisabledIconProperty =
DependencyProperty.Register("DisabledIcon", typeof(object), typeof(IconButton), new PropertyMetadata()); public object Header
{
get { return (object)GetValue(HeaderProperty); }
set { SetValue(HeaderProperty, value); }
} // Using a DependencyProperty as the backing store for Header. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HeaderProperty =
DependencyProperty.Register("Header", typeof(object), typeof(IconButton), new PropertyMetadata(null)); public Thickness HeaderMargin
{
get { return (Thickness)GetValue(HeaderMarginProperty); }
set { SetValue(HeaderMarginProperty, value); }
} // Using a DependencyProperty as the backing store for HeaderMargin. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HeaderMarginProperty =
DependencyProperty.Register("HeaderMargin", typeof(Thickness), typeof(IconButton), new PropertyMetadata(new Thickness(0d))); public HorizontalAlignment HeaderHorizontalAlignment
{
get { return (HorizontalAlignment)GetValue(HeaderHorizontalAlignmentProperty); }
set { SetValue(HeaderHorizontalAlignmentProperty, value); }
} // Using a DependencyProperty as the backing store for HeaderHorizontalAlignment. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HeaderHorizontalAlignmentProperty =
DependencyProperty.Register("HeaderHorizontalAlignment", typeof(HorizontalAlignment), typeof(IconButton), new PropertyMetadata(HorizontalAlignment.Center)); public VerticalAlignment HeaderVerticalAlignment
{
get { return (VerticalAlignment)GetValue(HeaderVerticalAlignmentProperty); }
set { SetValue(HeaderVerticalAlignmentProperty, value); }
} // Using a DependencyProperty as the backing store for HeaderVerticalAlignment. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HeaderVerticalAlignmentProperty =
DependencyProperty.Register("HeaderVerticalAlignment", typeof(VerticalAlignment), typeof(IconButton), new PropertyMetadata(VerticalAlignment.Center)); public GridLength HeaderWidth
{
get { return (GridLength)GetValue(HeaderWidthProperty); }
set { SetValue(HeaderWidthProperty, value); }
} // Using a DependencyProperty as the backing store for HeaderWidth. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HeaderWidthProperty =
DependencyProperty.Register("HeaderWidth", typeof(GridLength), typeof(IconButton), new PropertyMetadata(GridLength.Auto)); public object MouseOverHeader
{
get { return (object)GetValue(MouseOverHeaderProperty); }
set { SetValue(MouseOverHeaderProperty, value); }
} // Using a DependencyProperty as the backing store for MouseOverHeader. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MouseOverHeaderProperty =
DependencyProperty.Register("MouseOverHeader", typeof(object), typeof(IconButton), new PropertyMetadata(null)); public object DisabledHeader
{
get { return (object)GetValue(DisabledHeaderProperty); }
set { SetValue(DisabledHeaderProperty, value); }
} // Using a DependencyProperty as the backing store for DisabledHeader. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DisabledHeaderProperty =
DependencyProperty.Register("DisabledHeader", typeof(object), typeof(IconButton), new PropertyMetadata(null)); public Brush MouseOverBackground
{
get { return (Brush)GetValue(MouseOverBackgroundProperty); }
set { SetValue(MouseOverBackgroundProperty, value); }
} // Using a DependencyProperty as the backing store for MouseOverBackground. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MouseOverBackgroundProperty =
DependencyProperty.Register("MouseOverBackground", typeof(Brush), typeof(IconButton), new PropertyMetadata(null)); public Brush MouseOverForeground
{
get { return (Brush)GetValue(MouseOverForegroundProperty); }
set { SetValue(MouseOverForegroundProperty, value); }
} // Using a DependencyProperty as the backing store for MouseOverForeground. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MouseOverForegroundProperty =
DependencyProperty.Register("MouseOverForeground", typeof(Brush), typeof(IconButton), new PropertyMetadata(new SolidColorBrush(Colors.Transparent))); public Brush NormalBackground
{
get { return (Brush)GetValue(NormalBackgroundProperty); }
set { SetValue(NormalBackgroundProperty, value); }
} // Using a DependencyProperty as the backing store for NormalBackground. This enables animation, styling, binding, etc...
public static readonly DependencyProperty NormalBackgroundProperty =
DependencyProperty.Register("NormalBackground", typeof(Brush), typeof(IconButton), new PropertyMetadata(null)); public Brush NormalForeground
{
get { return (Brush)GetValue(NormalForegroundProperty); }
set { SetValue(NormalForegroundProperty, value); }
} // Using a DependencyProperty as the backing store for NormalForeground. This enables animation, styling, binding, etc...
public static readonly DependencyProperty NormalForegroundProperty =
DependencyProperty.Register("NormalForeground", typeof(Brush), typeof(IconButton), new PropertyMetadata(null)); public Brush DisabledBackground
{
get { return (Brush)GetValue(DisabledBackgroundProperty); }
set { SetValue(DisabledBackgroundProperty, value); }
} // Using a DependencyProperty as the backing store for DisabledBackground. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DisabledBackgroundProperty =
DependencyProperty.Register("DisabledBackground", typeof(Brush), typeof(IconButton), new PropertyMetadata(null)); public Brush DisabledForeground
{
get { return (Brush)GetValue(DisabledForegroundProperty); }
set { SetValue(DisabledForegroundProperty, value); }
} // Using a DependencyProperty as the backing store for DisabledForeground. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DisabledForegroundProperty =
DependencyProperty.Register("DisabledForeground", typeof(Brush), typeof(IconButton), new PropertyMetadata(null));
#endregion }