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我正在修改RadioButton以用作iOS中已知的分段控件。帶綁定的觸發樣式更新，相關來源
下面是它的外觀： 
我的改裝風格看起來是這樣的：
<Style TargetType="control:SegmentRadioButton" x:Key="SegmentedRadioButtonStyle">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="control:SegmentRadioButton">
<Grid x:Name="RootGrid" Background="{TemplateBinding Background}">
<ContentPresenter
x:Name="ContentPresenter"
Padding="{TemplateBinding Padding}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
AutomationProperties.AccessibilityView="Raw"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
ContentTransitions="{TemplateBinding ContentTransitions}"
Background="{TemplateBinding Background}"
Foreground="{TemplateBinding Foreground}"/>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal">
<Storyboard>
<PointerUpThemeAnimation Storyboard.TargetName="RootGrid" />
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="CheckStates">
<VisualState x:Name="Checked">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding SelectedTextColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding TintColor, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unchecked">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding Foreground, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{Binding Background, RelativeSource={RelativeSource TemplatedParent}}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Indeterminate" />
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
而我得到的控制是這樣的：
public class SegmentRadioButton : RadioButton
{
public static readonly DependencyProperty SelectedTextColorProperty = DependencyProperty.Register(
"SelectedTextColor",
typeof(SolidColorBrush), typeof(SegmentRadioButton),
new PropertyMetadata(default(SolidColorBrush), new PropertyChangedCallback(OnSelectedTextChanged)));
public SolidColorBrush SelectedTextColor
{
get => (SolidColorBrush) GetValue(SelectedTextColorProperty);
set => SetValue(SelectedTextColorProperty, value);
}
public static readonly DependencyProperty TintColorProperty = DependencyProperty.Register(
"TintColor", typeof(SolidColorBrush), typeof(SegmentRadioButton), new PropertyMetadata(default(SolidColorBrush), new PropertyChangedCallback(OnTintChanged)));
public SolidColorBrush TintColor
{
get => (SolidColorBrush) GetValue(TintColorProperty);
set => SetValue(TintColorProperty, value);
}
public SegmentRadioButton()
{
}
private static void OnTintChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is SegmentRadioButton segment)
{
segment.BorderBrush = (SolidColorBrush) e.NewValue;
if (segment.IsChecked ?? false)
{
// Hack to make the selected segment re-draw.
segment.IsChecked = false;
segment.IsChecked = true;
}
}
}
private static void OnSelectedTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is SegmentRadioButton segment)
{
if (segment.IsChecked ?? false)
{
// Hack to make the selected segment re-draw.
segment.IsChecked = false;
segment.IsChecked = true;
}
}
}
}
的問題：這實際工作，但我想知道是否有更優雅和更少的方法來使t他TintColor和SelectedTextColor更新？正如你可以從兩個在線評論中看到的，我通過翻轉IsChecked值來更新/重新繪製
我覺得沒有任何問題。您將「IsChecked」屬性設置爲false，並重置爲true，以觸發控件模板中的「已檢查」可視狀態。然後，您的控件可以及時更新顏色。 – Skyblue
是的，這有效，但我覺得它有點哈克。我結束了你使用視覺狀態管理器。它仍然感覺有點冒險，但現在我的想法更加清晰。 –