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Merge pull request #596 from irihitech/treeview

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Make TreeViewItem indentation easier
This commit is contained in:
Zhang Dian
2025-04-16 22:11:26 +08:00
committed by GitHub
parent 5bd08daaac cae26f2134
commit 6f98fbb21c
2 changed files with 34 additions and 13 deletions
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25
src/Semi.Avalonia/Controls/TreeView.axaml
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@@ -1,7 +1,7 @@
<ResourceDictionary
xmlns="https://github.com/avaloniaui"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:converters="clr-namespace:Avalonia.Controls.Converters;assembly=Avalonia.Controls"
xmlns:converters="clr-namespace:Semi.Avalonia.Converters"
x:CompileBindings="True">
<Design.PreviewWith>
@@ -40,8 +40,8 @@
AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
Background="{TemplateBinding Background}"
HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
IsDeferredScrollingEnabled="{TemplateBinding (ScrollViewer.IsDeferredScrollingEnabled)}"
IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
VerticalScrollBarVisibility="{TemplateBinding (ScrollViewer.VerticalScrollBarVisibility)}">
<ItemsPresenter
Name="PART_ItemsPresenter"
@@ -53,10 +53,6 @@
</Setter>
</ControlTheme>
<converters:MarginMultiplierConverter
x:Key="TreeViewItemLeftMarginConverter"
Indent="{StaticResource TreeViewItemIndent}"
Left="True" />
<ControlTheme x:Key="ToggleButtonTreeViewItemIconButton" TargetType="ToggleButton">
<Setter Property="Margin" Value="0" />
<Setter Property="Cursor" Value="Hand" />
@@ -71,10 +67,10 @@
Background="Transparent">
<PathIcon
Name="PART_ExpandIconPath"
Theme="{StaticResource InnerPathIcon}"
Classes="Small"
Data="{DynamicResource ExpanderIconData}"
Foreground="{DynamicResource TreeViewItemIconDefaultForeground}">
Foreground="{DynamicResource TreeViewItemIconDefaultForeground}"
Theme="{StaticResource InnerPathIcon}">
<PathIcon.Transitions>
<Transitions>
<TransformOperationsTransition Property="RenderTransform" Duration="0.1" />
@@ -110,16 +106,19 @@
CornerRadius="{TemplateBinding CornerRadius}"
Focusable="True"
TemplatedControl.IsTemplateFocusTarget="True">
<Grid
Name="PART_Header"
Margin="{TemplateBinding Level, Mode=OneWay, Converter={StaticResource TreeViewItemLeftMarginConverter}}"
ColumnDefinitions="Auto, *">
<Grid Name="PART_Header" ColumnDefinitions="Auto, *">
<Grid.Margin>
<MultiBinding Converter="{x:Static converters:TreeViewItemIndentConverter.Instance}">
<Binding Path="Level" RelativeSource="{RelativeSource TemplatedParent}" />
<DynamicResource ResourceKey="TreeViewItemIndent" />
</MultiBinding>
</Grid.Margin>
<ToggleButton
Name="PART_ExpandCollapseChevron"
Grid.Column="0"
Padding="{DynamicResource TreeViewItemIconMargin}"
Focusable="False"
IsChecked="{TemplateBinding IsExpanded, Mode=TwoWay}"
IsChecked="{TemplateBinding IsExpanded,Mode=TwoWay}"
Theme="{StaticResource ToggleButtonTreeViewItemIconButton}" />
<ContentPresenter
Name="PART_HeaderPresenter"

22
src/Semi.Avalonia/Converters/TreeViewItemIndentConverter.cs Normal file
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@@ -0,0 +1,22 @@
using System;
using System.Collections.Generic;
using System.Globalization;
using Avalonia;
using Avalonia.Data.Converters;
namespace Semi.Avalonia.Converters;
public class TreeViewItemIndentConverter : IMultiValueConverter
{
public static readonly TreeViewItemIndentConverter Instance = new();
public object? Convert(IList<object?> values, Type targetType, object? parameter, CultureInfo culture)
{
if (values.Count > 1 && values[0] is int level && values[1] is double indent)
{
return new Thickness(indent * level, 0, 0, 0);
}
return new Thickness(0);
}
}