QI Mingxuan
630 lines
24 KiB
C#
630 lines
24 KiB
C#
using System;
|
||
using System.Windows;
|
||
using System.Windows.Controls;
|
||
using System.Windows.Input;
|
||
using System.Windows.Media;
|
||
|
||
namespace XP.Common.Controls
|
||
{
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
/// <remarks>
|
||
/// 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。
|
||
/// Supports dual-axis/single-axis Y mode, dead zone configuration, normalized proportional output (-1.0 ~ 1.0),
|
||
/// left/right mouse button differentiation, and four-directional icon switching.
|
||
/// </remarks>
|
||
[TemplatePart(Name = PART_Thumb, Type = typeof(UIElement))]
|
||
public class VirtualJoystick : Control
|
||
{
|
||
/// <summary>
|
||
/// 操控点模板部件名称 | Thumb template part name
|
||
/// </summary>
|
||
private const string PART_Thumb = "PART_Thumb";
|
||
|
||
#region 私有字段 | Private Fields
|
||
|
||
/// <summary>
|
||
/// 是否正在拖拽 | Whether dragging is in progress
|
||
/// </summary>
|
||
private bool _isDragging;
|
||
|
||
/// <summary>
|
||
/// 控件中心点坐标 | Control center point coordinates
|
||
/// </summary>
|
||
private Point _centerPoint;
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
private TranslateTransform _thumbTransform = new TranslateTransform();
|
||
|
||
#endregion
|
||
#region 静态构造函数 | Static Constructor
|
||
|
||
static VirtualJoystick()
|
||
{
|
||
DefaultStyleKeyProperty.OverrideMetadata(
|
||
typeof(VirtualJoystick),
|
||
new FrameworkPropertyMetadata(typeof(VirtualJoystick)));
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region JoystickMode 依赖属性 | JoystickMode Dependency Property
|
||
|
||
/// <summary>
|
||
/// 摇杆轴模式依赖属性 | Joystick axis mode dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty JoystickModeProperty =
|
||
DependencyProperty.Register(
|
||
nameof(JoystickMode),
|
||
typeof(JoystickMode),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(JoystickMode.DualAxis));
|
||
|
||
/// <summary>
|
||
/// 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)
|
||
/// </summary>
|
||
public JoystickMode JoystickMode
|
||
{
|
||
get => (JoystickMode)GetValue(JoystickModeProperty);
|
||
set => SetValue(JoystickModeProperty, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region OutputX 只读依赖属性 | OutputX Read-Only Dependency Property
|
||
|
||
/// <summary>
|
||
/// OutputX 只读依赖属性键 | OutputX read-only dependency property key
|
||
/// </summary>
|
||
private static readonly DependencyPropertyKey OutputXPropertyKey =
|
||
DependencyProperty.RegisterReadOnly(
|
||
nameof(OutputX),
|
||
typeof(double),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(0.0));
|
||
|
||
/// <summary>
|
||
/// X 轴归一化输出依赖属性 | X-axis normalized output dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty OutputXProperty = OutputXPropertyKey.DependencyProperty;
|
||
|
||
/// <summary>
|
||
/// 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]
|
||
/// </summary>
|
||
public double OutputX
|
||
{
|
||
get => (double)GetValue(OutputXProperty);
|
||
internal set => SetValue(OutputXPropertyKey, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region OutputY 只读依赖属性 | OutputY Read-Only Dependency Property
|
||
|
||
/// <summary>
|
||
/// OutputY 只读依赖属性键 | OutputY read-only dependency property key
|
||
/// </summary>
|
||
private static readonly DependencyPropertyKey OutputYPropertyKey =
|
||
DependencyProperty.RegisterReadOnly(
|
||
nameof(OutputY),
|
||
typeof(double),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(0.0));
|
||
|
||
/// <summary>
|
||
/// Y 轴归一化输出依赖属性 | Y-axis normalized output dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty OutputYProperty = OutputYPropertyKey.DependencyProperty;
|
||
|
||
/// <summary>
|
||
/// 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]
|
||
/// </summary>
|
||
public double OutputY
|
||
{
|
||
get => (double)GetValue(OutputYProperty);
|
||
internal set => SetValue(OutputYPropertyKey, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region DeadZone 依赖属性 | DeadZone Dependency Property
|
||
|
||
/// <summary>
|
||
/// 死区比例依赖属性 | Dead zone ratio dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty DeadZoneProperty =
|
||
DependencyProperty.Register(
|
||
nameof(DeadZone),
|
||
typeof(double),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(0.05));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public double DeadZone
|
||
{
|
||
get => (double)GetValue(DeadZoneProperty);
|
||
set => SetValue(DeadZoneProperty, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region ActiveMouseButton 只读依赖属性 | ActiveMouseButton Read-Only Dependency Property
|
||
|
||
/// <summary>
|
||
/// ActiveMouseButton 只读依赖属性键 | ActiveMouseButton read-only dependency property key
|
||
/// </summary>
|
||
private static readonly DependencyPropertyKey ActiveMouseButtonPropertyKey =
|
||
DependencyProperty.RegisterReadOnly(
|
||
nameof(ActiveMouseButton),
|
||
typeof(MouseButtonType),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(MouseButtonType.None));
|
||
|
||
/// <summary>
|
||
/// 当前激活的鼠标按键依赖属性 | Active mouse button dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty ActiveMouseButtonProperty = ActiveMouseButtonPropertyKey.DependencyProperty;
|
||
|
||
/// <summary>
|
||
/// 获取当前激活的鼠标按键（None、Left、Right）| Gets the currently active mouse button (None, Left, Right)
|
||
/// </summary>
|
||
public MouseButtonType ActiveMouseButton
|
||
{
|
||
get => (MouseButtonType)GetValue(ActiveMouseButtonProperty);
|
||
internal set => SetValue(ActiveMouseButtonPropertyKey, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 左键四向图标依赖属性 | Left Button Directional Icon Dependency Properties
|
||
|
||
/// <summary>
|
||
/// 左键拖动时上方图标内容依赖属性 | Left button top icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty LeftButtonTopIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(LeftButtonTopIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? LeftButtonTopIcon
|
||
{
|
||
get => GetValue(LeftButtonTopIconProperty);
|
||
set => SetValue(LeftButtonTopIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 左键拖动时下方图标内容依赖属性 | Left button bottom icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty LeftButtonBottomIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(LeftButtonBottomIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? LeftButtonBottomIcon
|
||
{
|
||
get => GetValue(LeftButtonBottomIconProperty);
|
||
set => SetValue(LeftButtonBottomIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 左键拖动时左方图标内容依赖属性 | Left button left icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty LeftButtonLeftIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(LeftButtonLeftIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? LeftButtonLeftIcon
|
||
{
|
||
get => GetValue(LeftButtonLeftIconProperty);
|
||
set => SetValue(LeftButtonLeftIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 左键拖动时右方图标内容依赖属性 | Left button right icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty LeftButtonRightIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(LeftButtonRightIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? LeftButtonRightIcon
|
||
{
|
||
get => GetValue(LeftButtonRightIconProperty);
|
||
set => SetValue(LeftButtonRightIconProperty, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 右键四向图标依赖属性 | Right Button Directional Icon Dependency Properties
|
||
|
||
/// <summary>
|
||
/// 右键拖动时上方图标内容依赖属性 | Right button top icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty RightButtonTopIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(RightButtonTopIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? RightButtonTopIcon
|
||
{
|
||
get => GetValue(RightButtonTopIconProperty);
|
||
set => SetValue(RightButtonTopIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 右键拖动时下方图标内容依赖属性 | Right button bottom icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty RightButtonBottomIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(RightButtonBottomIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? RightButtonBottomIcon
|
||
{
|
||
get => GetValue(RightButtonBottomIconProperty);
|
||
set => SetValue(RightButtonBottomIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 右键拖动时左方图标内容依赖属性 | Right button left icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty RightButtonLeftIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(RightButtonLeftIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? RightButtonLeftIcon
|
||
{
|
||
get => GetValue(RightButtonLeftIconProperty);
|
||
set => SetValue(RightButtonLeftIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 右键拖动时右方图标内容依赖属性 | Right button right icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty RightButtonRightIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(RightButtonRightIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? RightButtonRightIcon
|
||
{
|
||
get => GetValue(RightButtonRightIconProperty);
|
||
set => SetValue(RightButtonRightIconProperty, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region ThumbElement 内部属性 | ThumbElement Internal Property
|
||
|
||
/// <summary>
|
||
/// 操控点 UI 元素引用（从模板获取）| Thumb UI element reference (obtained from template)
|
||
/// </summary>
|
||
internal UIElement? ThumbElement { get; private set; }
|
||
|
||
#endregion
|
||
|
||
#region 默认四向图标依赖属性 | Default Directional Icon Dependency Properties
|
||
|
||
/// <summary>
|
||
/// 默认状态上方图标内容依赖属性 | Default top icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty DefaultTopIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(DefaultTopIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? DefaultTopIcon
|
||
{
|
||
get => GetValue(DefaultTopIconProperty);
|
||
set => SetValue(DefaultTopIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 默认状态下方图标内容依赖属性 | Default bottom icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty DefaultBottomIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(DefaultBottomIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? DefaultBottomIcon
|
||
{
|
||
get => GetValue(DefaultBottomIconProperty);
|
||
set => SetValue(DefaultBottomIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 默认状态左方图标内容依赖属性 | Default left icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty DefaultLeftIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(DefaultLeftIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? DefaultLeftIcon
|
||
{
|
||
get => GetValue(DefaultLeftIconProperty);
|
||
set => SetValue(DefaultLeftIconProperty, value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 默认状态右方图标内容依赖属性 | Default right icon content dependency property
|
||
/// </summary>
|
||
public static readonly DependencyProperty DefaultRightIconProperty =
|
||
DependencyProperty.Register(
|
||
nameof(DefaultRightIcon),
|
||
typeof(object),
|
||
typeof(VirtualJoystick),
|
||
new PropertyMetadata(null));
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public object? DefaultRightIcon
|
||
{
|
||
get => GetValue(DefaultRightIconProperty);
|
||
set => SetValue(DefaultRightIconProperty, value);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 模板应用 | Template Application
|
||
|
||
/// <summary>
|
||
/// 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
|
||
/// </summary>
|
||
public override void OnApplyTemplate()
|
||
{
|
||
base.OnApplyTemplate();
|
||
|
||
// 查找模板中的操控点元素 | Find the thumb element in the template
|
||
ThumbElement = GetTemplateChild(PART_Thumb) as UIElement;
|
||
|
||
if (ThumbElement != null)
|
||
{
|
||
// 设置平移变换用于拖拽跟随 | Set translate transform for drag following
|
||
ThumbElement.RenderTransform = _thumbTransform;
|
||
}
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 鼠标交互事件处理 | Mouse Interaction Event Handlers
|
||
|
||
/// <summary>
|
||
/// 鼠标左键按下时开始拖拽 | Start dragging when left mouse button is pressed
|
||
/// </summary>
|
||
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
|
||
{
|
||
base.OnMouseLeftButtonDown(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.Left);
|
||
e.Handled = true;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 鼠标右键按下时开始拖拽 | Start dragging when right mouse button is pressed
|
||
/// </summary>
|
||
protected override void OnMouseRightButtonDown(MouseButtonEventArgs e)
|
||
{
|
||
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
|
||
}
|
||
}
|