回答編集履歴
1
見直しキャンペーン中
test
CHANGED
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@@ -10,92 +10,18 @@
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</DataTemplate>
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```
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とはいえ長ったらしいですし、事実上こうでいい気がします
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とはいえ長ったらしいですし、事実上こうでいい気がします（下記画像左）
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```xml
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<ItemsControl Foreground="{TemplateBinding TextColor}" ItemsSource="{TemplateBinding ItemsSource}">
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```
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依存関係プロパティを追加したいだけなら、継承でいい気がします（下記画像中央）
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（ご破算にするようですが）`Foreground`をいじっていいなら、`Style`だけで済んでしまいます（下記画像右）
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---
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依存関係プロパティを追加したいだけなら、継承でいい気がします（継承すべきかラップすべきかは、なかなか難しいところですが）
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（ご破算にするようですが）`Foreground`をいじっていいなら、`Style`だけで済んでしまいます。
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```xml
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<ResourceDictionary
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:local="clr-namespace:Qie48og91me277i">
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<Style TargetType="{x:Type local:ScrollView}">
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<Setter Property="TextColor" Value="Red" />
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<Setter Property="Template">
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<Setter.Value>
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<ControlTemplate TargetType="{x:Type local:ScrollView}">
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<Border
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BorderBrush="Black"
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BorderThickness="1"
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CornerRadius="3">
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<ScrollViewer
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HorizontalScrollBarVisibility="Disabled"
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VerticalScrollBarVisibility="Hidden"
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VirtualizingPanel.ScrollUnit="Pixel">
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<ItemsControl Foreground="{TemplateBinding TextColor}" ItemsSource="{TemplateBinding ItemsSource}">
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<ItemsControl.Template>
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<ControlTemplate TargetType="{x:Type ItemsControl}">
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<ItemsPresenter />
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</ControlTemplate>
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</ItemsControl.Template>
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<ItemsControl.ItemsPanel>
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<ItemsPanelTemplate>
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<StackPanel Orientation="Vertical" />
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</ItemsPanelTemplate>
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</ItemsControl.ItemsPanel>
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<ItemsControl.ItemTemplate>
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<DataTemplate>
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<TextBlock Text="{Binding}" TextAlignment="Center" />
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<!--<TextBlock
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Foreground="{Binding TextColor, RelativeSource={RelativeSource FindAncestor, AncestorType=local:ScrollView}}"
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```xml:MainWindow.xaml
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TextAlignment="Center" />-->
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</DataTemplate>
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</ItemsControl.ItemTemplate>
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</ItemsControl>
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</ScrollViewer>
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</Border>
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</ControlTemplate>
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</Setter.Value>
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</Setter>
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</Style>
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<Style TargetType="{x:Type local:ScrollView2}">
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<Setter Property="TextColor" Value="Red" />
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<Setter Property="BorderBrush" Value="Black" />
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<Setter Property="BorderThickness" Value="1" />
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<Setter Property="CornerRadius" Value="3" />
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<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
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<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
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<Setter Property="VirtualizingPanel.ScrollUnit" Value="Pixel" />
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<Setter Property="TextBlock.TextAlignment" Value="Center" />
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<Setter Property="Template">
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<Setter.Value>
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<ControlTemplate TargetType="local:ScrollView2">
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<Border
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BorderBrush="{TemplateBinding BorderBrush}"
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BorderThickness="{TemplateBinding BorderThickness}"
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CornerRadius="{TemplateBinding CornerRadius}">
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<ScrollViewer Foreground="{TemplateBinding TextColor}">
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<ItemsPresenter />
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</ScrollViewer>
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</Border>
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</ControlTemplate>
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</Setter.Value>
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</Setter>
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</Style>
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</ResourceDictionary>
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```
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```xml
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<Window
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x:Class="Qie48og91me277i.MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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@@ -104,6 +30,8 @@
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Width="800"
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Height="450">
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<Window.Resources>
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<!-- （ご破算にするようですが）Foregroundをいじっていいなら、Styleだけで済んでしまいます。 -->
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<Style x:Key="ScrollViewStyle" TargetType="{x:Type ItemsControl}">
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<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
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<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
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@@ -126,26 +54,103 @@
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</Style>
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</Window.Resources>
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<UniformGrid Rows="1">
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<UniformGrid Margin="10" Rows="1">
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<GroupBox Header="TemplateBinding">
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<local:ScrollView
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<local:ScrollView ItemsSource="{Binding}" />
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<
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</GroupBox>
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<GroupBox Header="継承">
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<local:ScrollView2 ItemsSource="{Binding}" TextColor="Green" />
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</GroupBox>
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<GroupBox Header="Style only">
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<ItemsControl
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Foreground="Blue"
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CornerRadius="30,3,30,3"
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ItemsSource="{Binding}"
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ItemsSource="{Binding}"
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TextColor="Green" />
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<ItemsControl
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Margin="10"
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Foreground="Blue"
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ItemsSource="{Binding}"
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Style="{StaticResource ScrollViewStyle}" />
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Style="{StaticResource ScrollViewStyle}" />
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</GroupBox>
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</UniformGrid>
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</Window>
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```
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```xml:Generic.xaml
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<ResourceDictionary
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:local="clr-namespace:Qie48og91me277i">
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<Style TargetType="{x:Type local:ScrollView}">
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<Setter Property="TextColor" Value="Red" />
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<Setter Property="Template">
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<Setter.Value>
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<ControlTemplate TargetType="{x:Type local:ScrollView}">
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<Border
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BorderBrush="Black"
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BorderThickness="1"
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CornerRadius="3">
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<ScrollViewer
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HorizontalScrollBarVisibility="Disabled"
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VerticalScrollBarVisibility="Hidden"
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VirtualizingPanel.ScrollUnit="Pixel">
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<!-- とはいえ長ったらしいですし、事実上こうでいい気がします。 -->
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<ItemsControl Foreground="{TemplateBinding TextColor}" ItemsSource="{TemplateBinding ItemsSource}">
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<ItemsControl.Template>
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<ControlTemplate TargetType="{x:Type ItemsControl}">
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<ItemsPresenter />
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</ControlTemplate>
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</ItemsControl.Template>
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<ItemsControl.ItemsPanel>
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<ItemsPanelTemplate>
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<StackPanel Orientation="Vertical" />
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</ItemsPanelTemplate>
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</ItemsControl.ItemsPanel>
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<ItemsControl.ItemTemplate>
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<DataTemplate>
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<TextBlock Text="{Binding}" TextAlignment="Center" />
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<!-- 字面通り素直に受け取ればこうなります。 -->
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<!--<TextBlock
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Foreground="{Binding TextColor, RelativeSource={RelativeSource FindAncestor, AncestorType=local:ScrollView}}"
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Text="{Binding}"
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TextAlignment="Center" />-->
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</DataTemplate>
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</ItemsControl.ItemTemplate>
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</ItemsControl>
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</ScrollViewer>
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</Border>
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</ControlTemplate>
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</Setter.Value>
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</Setter>
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</Style>
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<Style TargetType="{x:Type local:ScrollView2}">
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<Setter Property="TextColor" Value="Red" />
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<Setter Property="BorderBrush" Value="Black" />
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<Setter Property="BorderThickness" Value="1" />
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<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
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<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
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<Setter Property="VirtualizingPanel.ScrollUnit" Value="Pixel" />
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<Setter Property="TextBlock.TextAlignment" Value="Center" />
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<Setter Property="Template">
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<Setter.Value>
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<ControlTemplate TargetType="local:ScrollView2">
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<Border
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BorderBrush="{TemplateBinding BorderBrush}"
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BorderThickness="{TemplateBinding BorderThickness}"
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CornerRadius="3">
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<ScrollViewer Foreground="{TemplateBinding TextColor}">
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<ItemsPresenter />
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</ScrollViewer>
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</Border>
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</ControlTemplate>
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</Setter.Value>
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</Setter>
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</Style>
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</ResourceDictionary>
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```
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```cs
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-
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Windows;
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@@ -181,6 +186,7 @@
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}
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}
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// 依存関係プロパティを追加したいだけなら、継承でいい気がします
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184
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public class ScrollView2 : ItemsControl
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{
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public Brush TextColor { get => (Brush)GetValue(TextColorProperty); set => SetValue(TextColorProperty, value); }
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@@ -188,17 +194,12 @@
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= DependencyProperty.Register(nameof(TextColor), typeof(Brush), typeof(ScrollView2),
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new PropertyMetadata(Brushes.Black));
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public CornerRadius CornerRadius { get => (CornerRadius)GetValue(CornerRadiusProperty); set => SetValue(CornerRadiusProperty, value); }
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public static readonly DependencyProperty CornerRadiusProperty
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= Border.CornerRadiusProperty.AddOwner(typeof(ScrollView2),
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new PropertyMetadata(new CornerRadius()));
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static ScrollView2()
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{
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DefaultStyleKeyProperty.OverrideMetadata(typeof(ScrollView2), new FrameworkPropertyMetadata(typeof(ScrollView2)));
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}
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}
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}
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```
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-
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