안녕하세요.
TreeView를 커스텀해서 디자인해보고 있는데,
TreeViewItem이 Extend 될 때 TreeView 내부의 ScrollViewer가
Extend된 TreeViewItem 사이즈 만큼 늘어나지 않고 있습니다.
어떤 부분이 문제인지 파악이 안되는데 어느 부분을 손대야지
ScrollViewer의 스크롤이 늘어난 ItemPresenter 사이즈를 인식해서 변할 수 있을까요
TreeView 스타일 부분
<Style TargetType="{x:Type back:CustomTreeView}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type back:CustomTreeView}">
<Border
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}"
CornerRadius="50">
<Border.OpacityMask>
<VisualBrush>
<VisualBrush.Visual>
<Border
Background="Black"
SnapsToDevicePixels="True"
CornerRadius="{Binding CornerRadius, RelativeSource={RelativeSource AncestorType=Border}}"
Width="{Binding ActualWidth, RelativeSource={RelativeSource AncestorType=Border}}"
Height="{Binding ActualHeight, RelativeSource={RelativeSource AncestorType=Border}}"
/>
</VisualBrush.Visual>
</VisualBrush>
</Border.OpacityMask>
<ScrollViewer x:Name="_tv_scrollviewer_"
VerticalScrollBarVisibility="Visible"
Margin="0 20 0 20">
<ItemsPresenter/>
</ScrollViewer>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
<Setter Property="CanContentScroll" TargetName="_tv_scrollviewer_" Value="true"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
TreeViewItem부분
<Style TargetType="{x:Type back:CustomTreeViewItem}">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Foreground" Value="Black"/>
<Setter Property="IsExpanded" Value="{Binding IsTreeExpanded, Mode=TwoWay}"/>
<Setter Property="IsSelected" Value="{Binding IsTreeSelected}"/>
<Setter Property="ItemsSource" Value="{Binding ChildItem}"/>
<Setter Property="SnapsToDevicePixels" Value="True"/>
<Setter Property="UseLayoutRounding" Value="True"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type back:CustomTreeViewItem}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Border x:Name="item"
Background="{TemplateBinding Background}"
Margin="0 5 0 0"
>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<back:ExpandButton x:Name="expand"
Grid.Column="0"
Foreground="{TemplateBinding Foreground}"
IsChecked="{Binding IsTreeExpanded, Mode=TwoWay}"
VerticalAlignment="Center"/>
<Border Grid.Column="1"
x:Name="textBorder"
CornerRadius="5"
Margin="0 0 30 0"
Background="#1BA1E2">
<TextBlock x:Name="text"
Grid.Column="1"
Foreground="White"
Text="{Binding Name}"
Margin="5 0 5 0"
TextTrimming="CharacterEllipsis"
VerticalAlignment="Center"/>
</Border>
</Grid>
</Border>
<ItemsPresenter Grid.Row="1" x:Name="items" Visibility="Collapsed" Margin="20 0 0 0"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="True">
<Setter TargetName="items" Property="Visibility" Value="Visible"/>
</Trigger>
<DataTrigger Binding="{Binding ElementName=expand, Path=IsChecked}" Value="True">
<Setter TargetName="items" Property="Visibility" Value="Visible"/>
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=expand, Path=IsChecked}" Value="False">
<Setter TargetName="items" Property="Visibility" Value="Collapsed"/>
</DataTrigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="Gray"/>
<Setter Property="Foreground" Value="White"/>
</Trigger>
<DataTrigger Binding="{Binding ChildItem}" Value="{x:Null}">
<Setter TargetName="expand" Property="Visibility" Value="Hidden"/>
</DataTrigger>
<DataTrigger Binding="{Binding IsLast}" Value="true">
<Setter TargetName="textBorder" Property="Background" Value="#B5739D"/>
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
