Shrlalgo.RvKits/Melskin/Controls/MultiTreeView.xaml

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:controls="clr-namespace:Melskin.Controls"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <!--  定义MultiTreeViewItem的样式  -->
    <Style TargetType="{x:Type controls:MultiTreeViewItem}" x:Key="DefaultMultiTreeViewItemStyle">
        <!--  设置前景色、背景色、边框圆角、字体大小等属性  -->
        <Setter Property="Background" Value="{DynamicResource ControlBackgroundNormalBrush}" />
        <Setter Property="Border.CornerRadius" Value="4" />
        <Setter Property="BorderBrush" Value="{DynamicResource BorderNormalBrush}" />
        <Setter Property="FontSize" Value="14" />
        <Setter Property="Foreground" Value="{DynamicResource TextPrimaryBrush}" />
        <Setter Property="Padding" Value="4,2,0,2" />
        <!--  设置焦点样式、是否对设备像素进行对齐、是否是Tab停止点、是否覆盖默认样式等属性  -->
        <Setter Property="FocusVisualStyle" Value="{DynamicResource FocusVisual}" />
        <Setter Property="IsTabStop" Value="False" />
        <Setter Property="OverridesDefaultStyle" Value="True" />
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <!--  定义模板  -->
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type controls:MultiTreeViewItem}">
                    <!--  定义网格布局  -->
                    <Grid Background="{TemplateBinding Background}">
                        <!--  定义列和行  -->
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto" />
                            <RowDefinition Height="Auto" />
                        </Grid.RowDefinitions>
                        <!--  定义边框，包含一个可展开/折叠的切换按钮、一个复选框和一个内容呈现器  -->
                        <Border
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            CornerRadius="{TemplateBinding Border.CornerRadius}"
                            HorizontalAlignment="Stretch"
                            Padding="{TemplateBinding Padding}"
                            SnapsToDevicePixels="True"
                            x:Name="Border">
                            <Grid>
                                <Grid.ColumnDefinitions>
                                    <!--  缩进  -->
                                    <ColumnDefinition Width="19" />
                                    <ColumnDefinition Width="Auto" />
                                    <ColumnDefinition Width="Auto" />
                                    <ColumnDefinition Width="*" />
                                </Grid.ColumnDefinitions>
                                <CheckBox
                                    Grid.Column="1"
                                    IsChecked="{Binding IsChecked, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
                                    x:Name="SelectionBox" />
                                <ToggleButton
                                    ClickMode="Press"
                                    Grid.Column="2"
                                    IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"
                                    Style="{DynamicResource ExpandCollapseToggleButtonStyle}"
                                    x:Name="Expander" />
                                <ContentPresenter
                                    ContentSource="Header"
                                    Grid.Column="3"
                                    HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                    Margin="{TemplateBinding Padding}"
                                    Name="PART_Header"
                                    TextElement.FontSize="{TemplateBinding FontSize}"
                                    VerticalAlignment="Center" />
                            </Grid>
                        </Border>
                        <!--  定义子项的呈现器  -->
                        <Grid Grid.Row="1">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="19" />
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="Auto" />
                                <ColumnDefinition Width="*" />
                            </Grid.ColumnDefinitions>
                            <ItemsPresenter
                                Grid.Column="1"
                                Grid.ColumnSpan="3"
                                HorizontalAlignment="Stretch"
                                Name="ItemsHost"
                                Visibility="Collapsed" />
                        </Grid>
                    </Grid>
                    <!--  定义触发器，用于改变在特定条件下的视觉效果  -->
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsExpanded" Value="True">
                            <Setter Property="Visibility" TargetName="ItemsHost" Value="Visible" />
                        </Trigger>
                        <Trigger Property="HasItems" Value="False">
                            <Setter Property="Visibility" TargetName="Expander" Value="Hidden" />
                        </Trigger>
                        <Trigger Property="UIElement.IsMouseOver" Value="True">
                            <Setter Property="Background" TargetName="Border" Value="{DynamicResource ControlBackgroundHoverBrush}" />
                        </Trigger>
                        <!-- <Trigger Property="exc:MultiTreeView.IsItemSelected" Value="true"> -->
                        <Trigger Property="IsChecked" Value="true">
                            <Setter Property="Background" TargetName="Border" Value="{DynamicResource ControlBackgroundSelectedBrush}" />
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="HasHeader" Value="False" />
                                <Condition Property="Width" Value="Auto" />
                            </MultiTrigger.Conditions>
                            <Setter Property="MinWidth" TargetName="PART_Header" Value="75" />
                        </MultiTrigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="HasHeader" Value="False" />
                                <Condition Property="Height" Value="Auto" />
                            </MultiTrigger.Conditions>
                            <Setter Property="MinHeight" TargetName="PART_Header" Value="19" />
                        </MultiTrigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource TextDisabledBrush}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <!--  定义样式触发器，用于改变在特定条件下的样式  -->
        <Style.Triggers>
            <Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
                <Setter Property="ItemsPanel">
                    <Setter.Value>
                        <ItemsPanelTemplate>
                            <VirtualizingStackPanel />
                        </ItemsPanelTemplate>
                    </Setter.Value>
                </Setter>
            </Trigger>
        </Style.Triggers>
    </Style>
    <!--  定义MultiTreeView的样式  -->
    <Style TargetType="{x:Type controls:MultiTreeView}" x:Key="DefaultMultiTreeViewStyle">
        <!--  定义样式触发器，用于改变在特定条件下的样式  -->
        <Style.Triggers>
            <Trigger Property="VirtualizingPanel.IsVirtualizing" Value="True">
                <Setter Property="ItemsPanel">
                    <Setter.Value>
                        <ItemsPanelTemplate>
                            <VirtualizingStackPanel />
                        </ItemsPanelTemplate>
                    </Setter.Value>
                </Setter>
            </Trigger>
        </Style.Triggers>
        <!--  设置前景色、背景色、边框颜色、边距、填充、边框厚度等属性  -->
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="FocusVisualStyle" Value="{x:Null}" />
        <Setter Property="Foreground" Value="{DynamicResource TextPrimaryBrush}" />
        <Setter Property="Margin" Value="0" />
        <Setter Property="OverridesDefaultStyle" Value="True" />
        <Setter Property="Padding" Value="0" />
        <!--  设置滚动条的可见性和内容滚动的能力  -->
        <Setter Property="ScrollViewer.CanContentScroll" Value="True" />
        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
        <!--  设置是否覆盖默认样式、是否对设备像素进行对齐等属性  -->
        <Setter Property="SnapsToDevicePixels" Value="True" />
        <!--  定义模板  -->
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type controls:MultiTreeView}">
                    <!--  定义触发器，用于改变在特定条件下的视觉效果  -->
                    <ControlTemplate.Triggers>
                        <Trigger Property="VirtualizingPanel.IsVirtualizing" Value="True">
                            <Setter Property="ScrollViewer.CanContentScroll" TargetName="ItemsPresenterScrollViewer" Value="True" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                    <!--  定义边框，包含一个滚动视图，滚动视图中包含了所有的树视图项  -->
                    <Border
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        CornerRadius="4"
                        Name="Border"
                        Padding="0">
                        <ScrollViewer
                            CanContentScroll="False"
                            HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
                            Name="ItemsPresenterScrollViewer"
                            VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
                            <ItemsPresenter Margin="{TemplateBinding Padding}" />
                        </ScrollViewer>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style BasedOn="{StaticResource DefaultMultiTreeViewItemStyle}" TargetType="{x:Type controls:MultiTreeViewItem}" />
    <!--  基于DefaultMultiTreeViewStyle的样式，应用于MultiTreeView  -->
    <Style BasedOn="{StaticResource DefaultMultiTreeViewStyle}" TargetType="{x:Type controls:MultiTreeView}" />
</ResourceDictionary>