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编写拖动效果装饰器与状态回显装饰器

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于智纯
2025-09-07 20:41:19 +08:00
parent f6b97e01b8
commit 7212a7dea7
4 changed files with 142 additions and 8 deletions
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8
RazorEngineTest/PositionAdorner.cs → RazorEngineTest/DropPlacementAdorner.cs
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@@ -10,19 +10,19 @@ namespace RazorEngineTest
using System.Windows.Documents;
using System.Windows.Media;
public class PositionAdorner : Adorner
public class DropPlacementAdorner : Adorner
{
private readonly string _position;
private static readonly Pen _pen;
static PositionAdorner()
static DropPlacementAdorner()
{
// 定义装饰器的画笔
_pen = new Pen(Brushes.Red, 5.0);
_pen.Freeze();
}
public PositionAdorner(UIElement adornedElement, string position)
public DropPlacementAdorner(UIElement adornedElement, string position)
: base(adornedElement)
{
_position = position;
@@ -36,13 +36,11 @@ namespace RazorEngineTest
// 根据位置信息绘制不同的视觉效果
switch (_position)
{
case "前":
case "上":
drawingContext.DrawLine(_pen,
new Point(0, 0),
new Point(adornedElementRect.Right, 0));
break;
case "后":
case "下":
drawingContext.DrawLine(_pen,
new Point(0, adornedElementRect.Bottom),

4
RazorEngineTest/MyControl.cs
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@@ -46,7 +46,7 @@ namespace RazorEngineTest
/// </summary>
public class MyControl : Control
{
private PositionAdorner? _currentAdorner = null;
private DropPlacementAdorner? _currentAdorner = null;
private AdornerLayer? _adornerLayer = null;
static MyControl()
{
@@ -61,7 +61,7 @@ namespace RazorEngineTest
if (_adornerLayer != null)
{
_currentAdorner = new PositionAdorner(this, position);
_currentAdorner = new DropPlacementAdorner(this, position);
_adornerLayer.Add(_currentAdorner);
}
}

66
RazorEngineTest/StateAdornerDecorator.cs Normal file
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@@ -0,0 +1,66 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace RazorEngineTest
{
/// <summary>
/// 按照步骤 1a 或 1b 操作，然后执行步骤 2 以在 XAML 文件中使用此自定义控件。
///
/// 步骤 1a) 在当前项目中存在的 XAML 文件中使用该自定义控件。
/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
/// 元素中:
///
/// xmlns:MyNamespace="clr-namespace:RazorEngineTest"
///
///
/// 步骤 1b) 在其他项目中存在的 XAML 文件中使用该自定义控件。
/// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
/// 元素中:
///
/// xmlns:MyNamespace="clr-namespace:RazorEngineTest;assembly=RazorEngineTest"
///
/// 您还需要添加一个从 XAML 文件所在的项目到此项目的项目引用，
/// 并重新生成以避免编译错误:
///
/// 在解决方案资源管理器中右击目标项目，然后依次单击
/// “添加引用”->“项目”->[浏览查找并选择此项目]
///
///
/// 步骤 2)
/// 继续操作并在 XAML 文件中使用控件。
///
/// <MyNamespace:StateAdornerDecorator/>
///
/// </summary>
[TemplateVisualState(GroupName = "SmartUnit", Name = "Normal")]
[TemplateVisualState(GroupName = "SmartUnit", Name = "Selected")]
[TemplateVisualState(GroupName = "SmartUnit", Name = "NormalHover")]
[TemplateVisualState(GroupName = "SmartUnit", Name = "SelectedHover")]
[TemplateVisualState(GroupName = "SmartUnit", Name = "NormalDragHover")]
[TemplateVisualState(GroupName = "SmartUnit", Name = "SelectedDragHover")]
[ContentProperty("Content")]
public class StateAdornerDecorator : ContentControl
{
static StateAdornerDecorator()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(StateAdornerDecorator), new FrameworkPropertyMetadata(typeof(StateAdornerDecorator)));
}
public StateAdornerDecorator()
{
VisualStateManager.GoToState(this, "Normal", true);
}
}
}

72
RazorEngineTest/Themes/Generic.xaml
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@@ -14,10 +14,80 @@
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:MyControl}">
<AdornerDecorator>
<!--使用「状态装饰器」对象做为模版的根对象，保证当前空间具备装饰层与状态切换动画-->
<local:StateAdornerDecorator>
<Border Background="{TemplateBinding Background}">
<TextBlock Text="装饰器测试" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Border>
</local:StateAdornerDecorator>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type local:StateAdornerDecorator}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:StateAdornerDecorator}">
<!--使用「装饰器」容器做为控件模板的根对象，保证当前控件可以为任何控件提供装饰层-->
<AdornerDecorator>
<Border BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<Border.Background>
<SolidColorBrush x:Name="BackgroundBrush" Color="White"/>
</Border.Background>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SmartUnit">
<VisualState x:Name="Normal">
<Storyboard>
<!--状态切换动画：背景色、前景色、填充色、描边色、透明度、边框尺寸、描边宽度，边框尺寸-->
<ColorAnimation Storyboard.TargetName="BackgroundBrush"
Storyboard.TargetProperty="Color"
From="White" To="Black"
Duration="0:0:3"
AutoReverse="True"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<!--状态切换动画-->
</Storyboard>
</VisualState>
<VisualState x:Name="NormalHover">
<Storyboard>
<!--状态切换动画-->
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedHover">
<Storyboard>
<!--状态切换动画-->
</Storyboard>
</VisualState>
<VisualState x:Name="NormalDragHover">
<Storyboard>
<!--状态切换动画-->
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedDragHover">
<Storyboard>
<!--状态切换动画-->
</Storyboard>
</VisualState>
<VisualStateGroup.Transitions>
<VisualTransition To="Normal">
<Storyboard>
<!--状态切换动画：背景色、前景色、填充色、描边色、透明度、边框尺寸、描边宽度，边框尺寸-->
<ColorAnimation Storyboard.TargetName="BackgroundBrush"
Storyboard.TargetProperty="Color"
From="White" To="Black"
Duration="0:0:3"
AutoReverse="True"/>
</Storyboard>
</VisualTransition>
</VisualStateGroup.Transitions>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter/>
</Border>
</AdornerDecorator>
</ControlTemplate>
</Setter.Value>