361 lines
13 KiB
C#
361 lines
13 KiB
C#
using System.Runtime.InteropServices;
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using System.Windows.Input;
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namespace Melskin.Controls;
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/// <summary>
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/// MelWindow 类继承自 WPF 的 Window 类，用于创建具有特定样式和功能的窗口。
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/// 该类通过设置默认样式资源引用来自定义窗口外观，并提供属性来控制窗口的行为和内容布局。
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/// </summary>
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public class MelWindow : Window
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{
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private const string VbMinimizeButtonName = "minimizeButton";
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private const string VbMaximizeRestoreButtonName = "maximizeRestoreButton";
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/// <summary>
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/// 用于在XAML模板中标识关闭按钮的名称。
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/// 此常量字符串值为 "closeButton"，用于在窗口样式应用时通过GetTemplateChild方法查找对应的关闭按钮控件。
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/// </summary>
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private const string VbCloseButtonName = "closeButton";
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/// <summary>
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///
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/// </summary>
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public MelWindow()
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{
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SetResourceReference(StyleProperty, typeof(MelWindow)); //设置默认的样式资源引用
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}
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#region 自定义标题栏按钮行为
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/// <inheritdoc />
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protected override void OnSourceInitialized(EventArgs e)
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{
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base.OnSourceInitialized(e);
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var helper = new WindowInteropHelper(this);
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var hwndSource = HwndSource.FromHwnd(helper.Handle);
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hwndSource?.AddHook(HwndSourceHook);
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}
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[DllImport("user32.dll")]
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[return: MarshalAs(UnmanagedType.Bool)]
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private static extern bool TrackMouseEvent(ref TRACKMOUSEEVENT lpEventTrack);
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/// <summary>
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/// 跟踪鼠标事件的结构体。
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/// </summary>
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[StructLayout(LayoutKind.Sequential)]
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public struct TRACKMOUSEEVENT
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{
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/// <summary>
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/// 结构体大小
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/// </summary>
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public int cbSize;
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/// <summary>
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/// 控制跟踪行为的标志
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/// </summary>
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public uint dwFlags;
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/// <summary>
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/// 要为其跟踪鼠标事件的窗口句柄
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/// </summary>
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public IntPtr hwndTrack;
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/// <summary>
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/// 可选的悬停时间（毫秒）
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/// </summary>
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public uint dwHoverTime;
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/// <summary>
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/// 初始化 TRACKMOUSEEVENT 结构体的新实例。
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/// </summary>
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/// <param name="dwFlags">A combination of flags that specify the services requested. The value should correspond to the TME_*
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/// constants defined by the Windows API.</param>
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/// <param name="hwndTrack">窗口句柄</param>
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public TRACKMOUSEEVENT(uint dwFlags, IntPtr hwndTrack)
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{
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this.cbSize = Marshal.SizeOf(typeof(TRACKMOUSEEVENT));
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this.dwFlags = dwFlags;
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this.hwndTrack = hwndTrack;
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this.dwHoverTime = 0;
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}
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}
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private const int WM_NCHITTEST = 0x0084;
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private const int WM_NCMOUSEMOVE = 0x00A0;
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private const int WM_NCMOUSELEAVE = 0x02A2;
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private const int WM_NCLBUTTONDOWN = 0x00A1;
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private const int WM_NCLBUTTONUP = 0x00A2;
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private const int WM_SYSCOMMAND = 0x0112;
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private const int HTMAXBUTTON = 9;
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private const int SC_MAXIMIZE = 0xF030;
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private const int SC_RESTORE = 0xF120;
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private const uint TME_LEAVE = 0x00000002;
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private const uint TME_NONCLIENT = 0x00000010;
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#endregion
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private bool isMouseOverMaximizeButton = false;
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private bool isMaximizeButtonPressed = false;
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/// <summary>
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/// 记录点击前的窗口状态，用于判断系统是否已通过 Snap Layout 处理了窗口状态变更。
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/// </summary>
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private WindowState windowStateBeforeClick;
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private IntPtr HwndSourceHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
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{
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switch (msg)
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{
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case WM_NCHITTEST:
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if (IsMouseOverMaximizeButton(lParam))
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{
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// 返回 HTMAXBUTTON 让 Windows 11 Shell 知道鼠标在最大化按钮上，
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// 从而触发 Snap Layout 弹出菜单。
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handled = true;
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return new IntPtr(HTMAXBUTTON);
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}
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else if (isMouseOverMaximizeButton || isMaximizeButtonPressed)
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{
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// 如果鼠标移出按钮区域，重置状态
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isMouseOverMaximizeButton = false;
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isMaximizeButtonPressed = false;
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UpdateMaximizeButtonVisualState();
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}
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break;
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case WM_NCMOUSEMOVE:
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bool isCurrentlyOver = IsMouseOverMaximizeButton(lParam);
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if (isCurrentlyOver != isMouseOverMaximizeButton)
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{
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isMouseOverMaximizeButton = isCurrentlyOver;
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UpdateMaximizeButtonVisualState();
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if (isMouseOverMaximizeButton)
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{
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var tme = new TRACKMOUSEEVENT(TME_LEAVE | TME_NONCLIENT, hwnd);
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TrackMouseEvent(ref tme);
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}
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}
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break;
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case WM_NCMOUSELEAVE:
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isMouseOverMaximizeButton = false;
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isMaximizeButtonPressed = false;
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UpdateMaximizeButtonVisualState();
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break;
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case WM_NCLBUTTONDOWN:
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if (isMouseOverMaximizeButton)
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{
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isMaximizeButtonPressed = true;
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windowStateBeforeClick = this.WindowState;
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UpdateMaximizeButtonVisualState();
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handled = true;
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}
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break;
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case WM_NCLBUTTONUP:
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if (isMaximizeButtonPressed)
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{
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isMaximizeButtonPressed = false;
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isMouseOverMaximizeButton = false;
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UpdateMaximizeButtonVisualState();
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// 检查系统是否已经通过 Snap Layout 处理了窗口状态变更
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// 如果窗口状态未被系统改变，说明用户只是普通点击最大化按钮
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if (this.WindowState == windowStateBeforeClick)
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{
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ToggleWindowState();
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}
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handled = true;
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}
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break;
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case WM_SYSCOMMAND:
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var command = wParam.ToInt32() & 0xFFF0;
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if (command == SC_MAXIMIZE || command == SC_RESTORE)
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{
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// 让系统正常处理 Snap Layout 发出的最大化/还原命令
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// 不要阻止这些消息，以确保 Snap Layout 选择的布局能正确应用
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}
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break;
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}
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return IntPtr.Zero;
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}
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private bool IsMouseOverMaximizeButton(IntPtr lParam)
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{
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// 使用 ToInt64() 确保在 64 位系统和多显示器环境下坐标解析正确
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var val = lParam.ToInt64();
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var x = (short)(val & 0xFFFF);
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var y = (short)((val >> 16) & 0xFFFF);
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var mousePos = new Point(x, y);
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var windowPos = this.PointFromScreen(mousePos);
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if (maximizeRestoreButton is Visual maximizeButtonVisual)
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{
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var bounds = VisualTreeHelper.GetDescendantBounds(maximizeButtonVisual);
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//Debug.WriteLine(bounds.ToString());
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var buttonTransform = maximizeButtonVisual.TransformToAncestor(this);
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var buttonRect = buttonTransform.TransformBounds(bounds);
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return buttonRect.Contains(windowPos);
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}
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return false;
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}
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private void UpdateMaximizeButtonVisualState()
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{
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string stateName;
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if (isMaximizeButtonPressed && isMouseOverMaximizeButton)
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{
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stateName = "Pressed";
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}
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else if (isMouseOverMaximizeButton)
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{
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stateName = "MouseOver";
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}
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else
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{
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stateName = "Normal";
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}
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//VisualStateManager.GoToState(maximizeRestoreButton, stateName, true);
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maximizeRestoreButton?.Background = stateName switch
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{
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"Pressed" =>
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//VisualStateManager.GoToState(maximizeRestoreButton, "Pressed", true);
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new SolidColorBrush((Color)ColorConverter.ConvertFromString("#33000000")),
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"MouseOver" =>
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//VisualStateManager.GoToState(maximizeRestoreButton, "MouseOver", true);
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new SolidColorBrush((Color)ColorConverter.ConvertFromString("#1A000000")),
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"Normal" => Brushes.Transparent,
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//VisualStateManager.GoToState(maximizeRestoreButton, "Normal", true);
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_ => maximizeRestoreButton?.Background
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};
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}
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#region Window Control Methods
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private void TitleBar_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
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{
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if (e.ClickCount == 2)
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{
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ToggleWindowState();
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}
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else
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{
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this.DragMove();
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}
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}
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private void maximizeRestoreButton_Click(object sender, RoutedEventArgs e)
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{
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ToggleWindowState();
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}
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private void ToggleWindowState()
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{
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this.WindowState = (this.WindowState == WindowState.Normal) ? WindowState.Maximized : WindowState.Normal;
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}
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private void CloseButton_Click(object sender, RoutedEventArgs e)
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{
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this.Close();
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}
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#endregion
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static MelWindow()
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{
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DefaultStyleKeyProperty.OverrideMetadata(typeof(MelWindow), new FrameworkPropertyMetadata(typeof(MelWindow)));
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}
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/// <summary>
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/// 如果窗口不活动，请让窗口的内容淡出。
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/// 默认值为真（已启用）。
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/// </summary>
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public static readonly DependencyProperty FadeContentIfInactiveProperty = DependencyProperty.Register(
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nameof(FadeContentIfInactive), typeof(bool), typeof(MelWindow), new FrameworkPropertyMetadata(true));
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/// <summary>
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/// 如果窗口不活动，请让窗口的内容淡出。
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/// 默认值为真（已启用）。
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/// </summary>
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public bool FadeContentIfInactive
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{
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get => (bool)GetValue(FadeContentIfInactiveProperty);
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set => SetValue(FadeContentIfInactiveProperty, value);
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}
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/// <summary>
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/// 标题栏左侧内容模板
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/// </summary>
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public object TitleBarLeftContent
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{
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get => (object)GetValue(TitleBarLeftContentProperty);
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set => SetValue(TitleBarLeftContentProperty, value);
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}
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/// <summary>
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/// 用于定义窗口左侧内容区域的数据模板。
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/// 此依赖属性允许开发者自定义左侧内容的布局和显示方式，通过设置不同的DataTemplate来改变该区域的内容呈现形式。
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/// </summary>
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public static readonly DependencyProperty TitleBarLeftContentProperty =
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DependencyProperty.Register(nameof(TitleBarLeftContent), typeof(object), typeof(MelWindow));
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/// <summary>
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/// 标题栏右侧内容模板
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/// </summary>
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public object TitleBarRightContent
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{
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get => (object)GetValue(TitleBarRightContentProperty);
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set => SetValue(TitleBarRightContentProperty, value);
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}
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/// <summary>
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/// 用于定义窗口右侧内容区域的数据模板。
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/// 此依赖属性允许开发者自定义右侧内容的布局和显示方式，通过设置不同的DataTemplate来改变该区域的内容呈现形式。
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/// </summary>
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public static readonly DependencyProperty TitleBarRightContentProperty =
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DependencyProperty.Register(nameof(TitleBarRightContent), typeof(object), typeof(MelWindow));
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private Button? minimizeButton;
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private Button? maximizeRestoreButton;
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private Button? closeButton;
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/// <inheritdoc />
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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minimizeButton?.Click -= MinimizeButtonClickHandler;
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minimizeButton = GetTemplateChild(VbMinimizeButtonName) as Button;
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minimizeButton?.Click += MinimizeButtonClickHandler;
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maximizeRestoreButton?.Click -= MaximizeRestoreButtonClickHandler;
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maximizeRestoreButton = GetTemplateChild(VbMaximizeRestoreButtonName) as Button;
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maximizeRestoreButton?.Click += MaximizeRestoreButtonClickHandler;
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closeButton?.Click -= CloseButtonClickHandler;
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closeButton = GetTemplateChild(VbCloseButtonName) as Button;
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closeButton?.Click += CloseButtonClickHandler;
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}
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private void CloseButtonClickHandler(object sender, RoutedEventArgs args)
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{
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Close();
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}
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private void MaximizeRestoreButtonClickHandler(object sender, RoutedEventArgs args)
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{
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WindowState = (WindowState == WindowState.Normal) ? WindowState.Maximized : WindowState.Normal;
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}
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private void MinimizeButtonClickHandler(object sender, RoutedEventArgs args)
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{
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WindowState = WindowState.Minimized;
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}
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}
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