Common类库新增摇杆控件。
This commit is contained in:
QI Mingxuan
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using System;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Input;
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using System.Windows.Media;
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namespace XP.Common.Controls
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{
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/// <summary>
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/// 虚拟摇杆自定义控件，提供圆形区域内的鼠标拖拽操控能力 | Virtual joystick custom control providing mouse drag interaction within a circular area
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/// </summary>
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/// <remarks>
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/// 支持双轴/单轴 Y 模式、死区配置、归一化比例输出（-1.0 ~ 1.0）、鼠标左右键区分及四向功能图标切换。
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/// Supports dual-axis/single-axis Y mode, dead zone configuration, normalized proportional output (-1.0 ~ 1.0),
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/// left/right mouse button differentiation, and four-directional icon switching.
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/// </remarks>
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[TemplatePart(Name = PART_Thumb, Type = typeof(UIElement))]
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public class VirtualJoystick : Control
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{
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/// <summary>
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/// 操控点模板部件名称 | Thumb template part name
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/// </summary>
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private const string PART_Thumb = "PART_Thumb";
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#region 私有字段 | Private Fields
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/// <summary>
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/// 是否正在拖拽 | Whether dragging is in progress
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/// </summary>
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private bool _isDragging;
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/// <summary>
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/// 控件中心点坐标 | Control center point coordinates
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/// </summary>
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private Point _centerPoint;
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/// <summary>
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/// 操控点的平移变换，用于跟随鼠标移动 | Translate transform for thumb element to follow mouse movement
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/// </summary>
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private TranslateTransform _thumbTransform = new TranslateTransform();
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#endregion
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#region 静态构造函数 | Static Constructor
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static VirtualJoystick()
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{
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DefaultStyleKeyProperty.OverrideMetadata(
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typeof(VirtualJoystick),
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new FrameworkPropertyMetadata(typeof(VirtualJoystick)));
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}
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#endregion
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#region JoystickMode 依赖属性 | JoystickMode Dependency Property
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/// <summary>
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/// 摇杆轴模式依赖属性 | Joystick axis mode dependency property
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/// </summary>
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public static readonly DependencyProperty JoystickModeProperty =
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DependencyProperty.Register(
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nameof(JoystickMode),
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typeof(JoystickMode),
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typeof(VirtualJoystick),
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new PropertyMetadata(JoystickMode.DualAxis));
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/// <summary>
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/// 获取或设置摇杆轴模式（双轴或单轴 Y）| Gets or sets the joystick axis mode (DualAxis or SingleAxisY)
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/// </summary>
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public JoystickMode JoystickMode
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{
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get => (JoystickMode)GetValue(JoystickModeProperty);
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set => SetValue(JoystickModeProperty, value);
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}
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#endregion
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#region OutputX 只读依赖属性 | OutputX Read-Only Dependency Property
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/// <summary>
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/// OutputX 只读依赖属性键 | OutputX read-only dependency property key
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/// </summary>
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private static readonly DependencyPropertyKey OutputXPropertyKey =
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DependencyProperty.RegisterReadOnly(
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nameof(OutputX),
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typeof(double),
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typeof(VirtualJoystick),
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new PropertyMetadata(0.0));
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/// <summary>
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/// X 轴归一化输出依赖属性 | X-axis normalized output dependency property
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/// </summary>
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public static readonly DependencyProperty OutputXProperty = OutputXPropertyKey.DependencyProperty;
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/// <summary>
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/// 获取 X 轴归一化输出值，范围 [-1.0, 1.0] | Gets the X-axis normalized output value, range [-1.0, 1.0]
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/// </summary>
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public double OutputX
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{
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get => (double)GetValue(OutputXProperty);
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internal set => SetValue(OutputXPropertyKey, value);
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}
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#endregion
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#region OutputY 只读依赖属性 | OutputY Read-Only Dependency Property
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/// <summary>
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/// OutputY 只读依赖属性键 | OutputY read-only dependency property key
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/// </summary>
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private static readonly DependencyPropertyKey OutputYPropertyKey =
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DependencyProperty.RegisterReadOnly(
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nameof(OutputY),
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typeof(double),
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typeof(VirtualJoystick),
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new PropertyMetadata(0.0));
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/// <summary>
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/// Y 轴归一化输出依赖属性 | Y-axis normalized output dependency property
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/// </summary>
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public static readonly DependencyProperty OutputYProperty = OutputYPropertyKey.DependencyProperty;
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/// <summary>
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/// 获取 Y 轴归一化输出值，范围 [-1.0, 1.0] | Gets the Y-axis normalized output value, range [-1.0, 1.0]
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/// </summary>
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public double OutputY
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{
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get => (double)GetValue(OutputYProperty);
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internal set => SetValue(OutputYPropertyKey, value);
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}
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#endregion
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#region DeadZone 依赖属性 | DeadZone Dependency Property
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/// <summary>
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/// 死区比例依赖属性 | Dead zone ratio dependency property
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/// </summary>
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public static readonly DependencyProperty DeadZoneProperty =
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DependencyProperty.Register(
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nameof(DeadZone),
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typeof(double),
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typeof(VirtualJoystick),
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new PropertyMetadata(0.05));
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/// <summary>
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/// 获取或设置死区比例，范围 [0.0, 1.0]，默认值 0.05 | Gets or sets the dead zone ratio, range [0.0, 1.0], default 0.05
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/// </summary>
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public double DeadZone
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{
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get => (double)GetValue(DeadZoneProperty);
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set => SetValue(DeadZoneProperty, value);
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}
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#endregion
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#region ActiveMouseButton 只读依赖属性 | ActiveMouseButton Read-Only Dependency Property
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/// <summary>
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/// ActiveMouseButton 只读依赖属性键 | ActiveMouseButton read-only dependency property key
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/// </summary>
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private static readonly DependencyPropertyKey ActiveMouseButtonPropertyKey =
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DependencyProperty.RegisterReadOnly(
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nameof(ActiveMouseButton),
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typeof(MouseButtonType),
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typeof(VirtualJoystick),
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new PropertyMetadata(MouseButtonType.None));
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/// <summary>
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/// 当前激活的鼠标按键依赖属性 | Active mouse button dependency property
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/// </summary>
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public static readonly DependencyProperty ActiveMouseButtonProperty = ActiveMouseButtonPropertyKey.DependencyProperty;
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/// <summary>
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/// 获取当前激活的鼠标按键（None、Left、Right）| Gets the currently active mouse button (None, Left, Right)
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/// </summary>
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public MouseButtonType ActiveMouseButton
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{
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get => (MouseButtonType)GetValue(ActiveMouseButtonProperty);
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internal set => SetValue(ActiveMouseButtonPropertyKey, value);
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}
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#endregion
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#region 左键四向图标依赖属性 | Left Button Directional Icon Dependency Properties
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/// <summary>
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/// 左键拖动时上方图标内容依赖属性 | Left button top icon content dependency property
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/// </summary>
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public static readonly DependencyProperty LeftButtonTopIconProperty =
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DependencyProperty.Register(
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nameof(LeftButtonTopIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置左键拖动时上方图标内容 | Gets or sets the top icon content when left button is dragging
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/// </summary>
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public object? LeftButtonTopIcon
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{
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get => GetValue(LeftButtonTopIconProperty);
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set => SetValue(LeftButtonTopIconProperty, value);
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}
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/// <summary>
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/// 左键拖动时下方图标内容依赖属性 | Left button bottom icon content dependency property
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/// </summary>
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public static readonly DependencyProperty LeftButtonBottomIconProperty =
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DependencyProperty.Register(
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nameof(LeftButtonBottomIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置左键拖动时下方图标内容 | Gets or sets the bottom icon content when left button is dragging
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/// </summary>
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public object? LeftButtonBottomIcon
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{
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get => GetValue(LeftButtonBottomIconProperty);
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set => SetValue(LeftButtonBottomIconProperty, value);
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}
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/// <summary>
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/// 左键拖动时左方图标内容依赖属性 | Left button left icon content dependency property
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/// </summary>
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public static readonly DependencyProperty LeftButtonLeftIconProperty =
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DependencyProperty.Register(
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nameof(LeftButtonLeftIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置左键拖动时左方图标内容 | Gets or sets the left icon content when left button is dragging
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/// </summary>
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public object? LeftButtonLeftIcon
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{
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get => GetValue(LeftButtonLeftIconProperty);
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set => SetValue(LeftButtonLeftIconProperty, value);
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}
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/// <summary>
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/// 左键拖动时右方图标内容依赖属性 | Left button right icon content dependency property
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/// </summary>
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public static readonly DependencyProperty LeftButtonRightIconProperty =
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DependencyProperty.Register(
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nameof(LeftButtonRightIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置左键拖动时右方图标内容 | Gets or sets the right icon content when left button is dragging
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/// </summary>
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public object? LeftButtonRightIcon
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{
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get => GetValue(LeftButtonRightIconProperty);
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set => SetValue(LeftButtonRightIconProperty, value);
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}
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#endregion
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#region 右键四向图标依赖属性 | Right Button Directional Icon Dependency Properties
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/// <summary>
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/// 右键拖动时上方图标内容依赖属性 | Right button top icon content dependency property
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/// </summary>
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public static readonly DependencyProperty RightButtonTopIconProperty =
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DependencyProperty.Register(
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nameof(RightButtonTopIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置右键拖动时上方图标内容 | Gets or sets the top icon content when right button is dragging
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/// </summary>
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public object? RightButtonTopIcon
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{
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get => GetValue(RightButtonTopIconProperty);
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set => SetValue(RightButtonTopIconProperty, value);
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}
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/// <summary>
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/// 右键拖动时下方图标内容依赖属性 | Right button bottom icon content dependency property
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/// </summary>
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public static readonly DependencyProperty RightButtonBottomIconProperty =
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DependencyProperty.Register(
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nameof(RightButtonBottomIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置右键拖动时下方图标内容 | Gets or sets the bottom icon content when right button is dragging
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/// </summary>
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public object? RightButtonBottomIcon
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{
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get => GetValue(RightButtonBottomIconProperty);
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set => SetValue(RightButtonBottomIconProperty, value);
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}
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/// <summary>
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/// 右键拖动时左方图标内容依赖属性 | Right button left icon content dependency property
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/// </summary>
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public static readonly DependencyProperty RightButtonLeftIconProperty =
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DependencyProperty.Register(
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nameof(RightButtonLeftIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置右键拖动时左方图标内容 | Gets or sets the left icon content when right button is dragging
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/// </summary>
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public object? RightButtonLeftIcon
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{
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get => GetValue(RightButtonLeftIconProperty);
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set => SetValue(RightButtonLeftIconProperty, value);
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}
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/// <summary>
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/// 右键拖动时右方图标内容依赖属性 | Right button right icon content dependency property
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/// </summary>
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public static readonly DependencyProperty RightButtonRightIconProperty =
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DependencyProperty.Register(
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nameof(RightButtonRightIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置右键拖动时右方图标内容 | Gets or sets the right icon content when right button is dragging
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/// </summary>
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public object? RightButtonRightIcon
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{
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get => GetValue(RightButtonRightIconProperty);
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set => SetValue(RightButtonRightIconProperty, value);
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}
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#endregion
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#region ThumbElement 内部属性 | ThumbElement Internal Property
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/// <summary>
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/// 操控点 UI 元素引用（从模板获取）| Thumb UI element reference (obtained from template)
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/// </summary>
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internal UIElement? ThumbElement { get; private set; }
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#endregion
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#region 默认四向图标依赖属性 | Default Directional Icon Dependency Properties
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/// <summary>
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/// 默认状态上方图标内容依赖属性 | Default top icon content dependency property
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/// </summary>
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public static readonly DependencyProperty DefaultTopIconProperty =
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DependencyProperty.Register(
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nameof(DefaultTopIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置默认状态上方图标内容 | Gets or sets the top icon content in default state
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/// </summary>
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public object? DefaultTopIcon
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{
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get => GetValue(DefaultTopIconProperty);
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set => SetValue(DefaultTopIconProperty, value);
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}
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/// <summary>
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/// 默认状态下方图标内容依赖属性 | Default bottom icon content dependency property
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/// </summary>
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public static readonly DependencyProperty DefaultBottomIconProperty =
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DependencyProperty.Register(
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nameof(DefaultBottomIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置默认状态下方图标内容 | Gets or sets the bottom icon content in default state
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/// </summary>
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public object? DefaultBottomIcon
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{
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get => GetValue(DefaultBottomIconProperty);
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set => SetValue(DefaultBottomIconProperty, value);
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}
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/// <summary>
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/// 默认状态左方图标内容依赖属性 | Default left icon content dependency property
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/// </summary>
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public static readonly DependencyProperty DefaultLeftIconProperty =
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DependencyProperty.Register(
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nameof(DefaultLeftIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置默认状态左方图标内容 | Gets or sets the left icon content in default state
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/// </summary>
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public object? DefaultLeftIcon
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{
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get => GetValue(DefaultLeftIconProperty);
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set => SetValue(DefaultLeftIconProperty, value);
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}
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/// <summary>
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/// 默认状态右方图标内容依赖属性 | Default right icon content dependency property
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/// </summary>
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public static readonly DependencyProperty DefaultRightIconProperty =
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DependencyProperty.Register(
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nameof(DefaultRightIcon),
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typeof(object),
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typeof(VirtualJoystick),
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new PropertyMetadata(null));
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/// <summary>
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/// 获取或设置默认状态右方图标内容 | Gets or sets the right icon content in default state
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/// </summary>
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public object? DefaultRightIcon
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{
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get => GetValue(DefaultRightIconProperty);
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set => SetValue(DefaultRightIconProperty, value);
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}
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#endregion
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#region 模板应用 | Template Application
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/// <summary>
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/// 应用控件模板时查找操控点元素并设置平移变换 | Find thumb element and set up translate transform when template is applied
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/// </summary>
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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// 查找模板中的操控点元素 | Find the thumb element in the template
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ThumbElement = GetTemplateChild(PART_Thumb) as UIElement;
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if (ThumbElement != null)
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{
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// 设置平移变换用于拖拽跟随 | Set translate transform for drag following
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ThumbElement.RenderTransform = _thumbTransform;
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}
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}
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#endregion
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#region 鼠标交互事件处理 | Mouse Interaction Event Handlers
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/// <summary>
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/// 鼠标左键按下时开始拖拽 | Start dragging when left mouse button is pressed
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/// </summary>
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protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
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{
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base.OnMouseLeftButtonDown(e);
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// 如果已在拖拽中或控件未启用，忽略 | Ignore if already dragging or control is disabled
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if (_isDragging || !IsEnabled)
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return;
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StartDrag(MouseButtonType.Left);
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e.Handled = true;
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}
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/// <summary>
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/// 鼠标右键按下时开始拖拽 | Start dragging when right mouse button is pressed
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/// </summary>
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protected override void OnMouseRightButtonDown(MouseButtonEventArgs e)
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{
|
||||
base.OnMouseRightButtonDown(e);
|
||||
|
||||
// 如果已在拖拽中或控件未启用，忽略 | Ignore if already dragging or control is disabled
|
||||
if (_isDragging || !IsEnabled)
|
||||
return;
|
||||
|
||||
StartDrag(MouseButtonType.Right);
|
||||
e.Handled = true;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 鼠标移动时更新操控点位置和输出值 | Update thumb position and output values when mouse moves
|
||||
/// </summary>
|
||||
protected override void OnMouseMove(MouseEventArgs e)
|
||||
{
|
||||
base.OnMouseMove(e);
|
||||
|
||||
if (!_isDragging)
|
||||
return;
|
||||
|
||||
try
|
||||
{
|
||||
// 获取鼠标相对于控件的位置 | Get mouse position relative to the control
|
||||
var mousePosition = e.GetPosition(this);
|
||||
|
||||
// 计算相对于中心的偏移量 | Calculate displacement from center
|
||||
var dx = mousePosition.X - _centerPoint.X;
|
||||
var dy = mousePosition.Y - _centerPoint.Y;
|
||||
|
||||
// 计算可用半径（取宽高较小值的一半）| Calculate available radius (half of the smaller dimension)
|
||||
var radius = GetRadius();
|
||||
if (radius <= 0)
|
||||
return;
|
||||
|
||||
// 将位移限制在圆形区域内 | Clamp displacement within circular area
|
||||
var (clampedDx, clampedDy) = JoystickCalculator.ClampToRadius(dx, dy, radius);
|
||||
|
||||
// 计算归一化输出（含死区映射）| Calculate normalized output (with dead zone mapping)
|
||||
var (outputX, outputY) = JoystickCalculator.CalculateOutput(dx, dy, radius, DeadZone, JoystickMode);
|
||||
|
||||
// 更新输出值 | Update output values
|
||||
OutputX = outputX;
|
||||
OutputY = outputY;
|
||||
|
||||
// 更新操控点的平移变换位置（使用限制后的位移）| Update thumb translate transform (using clamped displacement)
|
||||
_thumbTransform.X = clampedDx;
|
||||
_thumbTransform.Y = clampedDy;
|
||||
}
|
||||
catch
|
||||
{
|
||||
// 异常时重置到中心位置并输出归零 | Reset to center and zero output on exception
|
||||
ResetToCenter();
|
||||
}
|
||||
|
||||
e.Handled = true;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 鼠标左键释放时结束拖拽 | End dragging when left mouse button is released
|
||||
/// </summary>
|
||||
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
|
||||
{
|
||||
base.OnMouseLeftButtonUp(e);
|
||||
|
||||
// 仅当正在拖拽且激活按键为左键时处理 | Only handle when dragging with left button active
|
||||
if (!_isDragging || ActiveMouseButton != MouseButtonType.Left)
|
||||
return;
|
||||
|
||||
EndDrag();
|
||||
e.Handled = true;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 鼠标右键释放时结束拖拽 | End dragging when right mouse button is released
|
||||
/// </summary>
|
||||
protected override void OnMouseRightButtonUp(MouseButtonEventArgs e)
|
||||
{
|
||||
base.OnMouseRightButtonUp(e);
|
||||
|
||||
// 仅当正在拖拽且激活按键为右键时处理 | Only handle when dragging with right button active
|
||||
if (!_isDragging || ActiveMouseButton != MouseButtonType.Right)
|
||||
return;
|
||||
|
||||
EndDrag();
|
||||
e.Handled = true;
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region 拖拽辅助方法 | Drag Helper Methods
|
||||
|
||||
/// <summary>
|
||||
/// 开始拖拽操作 | Start drag operation
|
||||
/// </summary>
|
||||
/// <param name="buttonType">触发拖拽的鼠标按键类型 | Mouse button type that initiated the drag</param>
|
||||
private void StartDrag(MouseButtonType buttonType)
|
||||
{
|
||||
// 捕获鼠标以接收控件外的鼠标事件 | Capture mouse to receive events outside the control
|
||||
CaptureMouse();
|
||||
|
||||
// 设置激活的鼠标按键 | Set the active mouse button
|
||||
ActiveMouseButton = buttonType;
|
||||
|
||||
// 计算控件中心点 | Calculate control center point
|
||||
_centerPoint = new Point(ActualWidth / 2.0, ActualHeight / 2.0);
|
||||
|
||||
// 标记拖拽状态 | Mark dragging state
|
||||
_isDragging = true;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 结束拖拽操作 | End drag operation
|
||||
/// </summary>
|
||||
private void EndDrag()
|
||||
{
|
||||
// 重置到中心位置并归零输出 | Reset to center and zero output
|
||||
ResetToCenter();
|
||||
|
||||
// 释放鼠标捕获 | Release mouse capture
|
||||
ReleaseMouseCapture();
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 重置操控点到中心位置，输出归零，清除拖拽状态 | Reset thumb to center, zero output, clear drag state
|
||||
/// </summary>
|
||||
internal void ResetToCenter()
|
||||
{
|
||||
// 输出值归零 | Zero output values
|
||||
OutputX = 0.0;
|
||||
OutputY = 0.0;
|
||||
|
||||
// 清除激活的鼠标按键 | Clear active mouse button
|
||||
ActiveMouseButton = MouseButtonType.None;
|
||||
|
||||
// 清除拖拽状态 | Clear dragging state
|
||||
_isDragging = false;
|
||||
|
||||
// 重置操控点平移变换到中心 | Reset thumb translate transform to center
|
||||
_thumbTransform.X = 0.0;
|
||||
_thumbTransform.Y = 0.0;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 获取可用半径（取宽高较小值的一半）| Get available radius (half of the smaller dimension)
|
||||
/// </summary>
|
||||
/// <returns>可用半径 | Available radius</returns>
|
||||
private double GetRadius()
|
||||
{
|
||||
return Math.Min(ActualWidth, ActualHeight) / 2.0;
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user