WPF解决Popup窗口随动及显隐

使用自定义Popup控件，解决WPF控件被Winform遮挡、初始化时Z顺序错误导致显隐异常、输入框无法输入的问题，还可以设置Popup以全屏方式展现。

public class CusPopup : Popup
{/// <summary>/// 应用状态/// </summary>private bool? _appliedTopMost;/// <summary>/// 是否已经加载/// </summary>private bool _alreadyLoaded;/// <summary>/// popup所在的窗体/// </summary>private Window _parentWindow;/// <summary>/// 是否顶置/// </summary>public bool IsTopmost{get { return (bool)GetValue(IsTopmostProperty); }set { SetValue(IsTopmostProperty, value); }}/// <summary>/// 是否顶置依赖属性（默认不顶置）/// </summary>public static readonly DependencyProperty IsTopmostProperty = DependencyProperty.Register("IsTopmost", typeof(bool), typeof(CusPopup), new FrameworkPropertyMetadata(false, OnIsTopmostChanged));/// <summary>/// 是否跟随父窗体移动（默认为True）/// </summary>public bool IsMove{get { return (bool)GetValue(IsMoveProperty); }set { SetValue(IsMoveProperty, value); }}public static readonly DependencyProperty IsMoveProperty =DependencyProperty.Register("IsMove", typeof(bool), typeof(CusPopup), new PropertyMetadata(true));/// <summary>/// 是否包含TextBox控件/// </summary>public bool IsHasTextBox{get { return (bool)GetValue(IsHasTextBoxProperty); }set { SetValue(IsHasTextBoxProperty, value); }}public static readonly DependencyProperty IsHasTextBoxProperty =DependencyProperty.Register("IsHasTextBox", typeof(bool), typeof(CusPopup), new PropertyMetadata(false));/// <summary>/// 是否全屏/// </summary>public bool IsFullScreen{get { return (bool)GetValue(IsFullScreenProperty); }set { SetValue(IsFullScreenProperty, value); }}public static readonly DependencyProperty IsFullScreenProperty =DependencyProperty.Register("IsFullScreen", typeof(bool), typeof(CusPopup), new PropertyMetadata(false, OnFullScreenChanged));/// <summary>/// 全屏设置改变事件/// </summary>/// <param name="d"></param>/// <param name="e"></param>private static void OnFullScreenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e){CusPopup pop = (CusPopup)d;if((bool)e.NewValue == true){pop.Opened += Pop_Opened;}}/// <summary>/// 全屏时打开pop事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private static void Pop_Opened(object sender, EventArgs e){Popup pop = sender as Popup;DependencyObject parent = pop.Child;do{parent = System.Windows.Media.VisualTreeHelper.GetParent(parent);if (parent != null && parent.ToString() == "System.Windows.Controls.Primitives.PopupRoot"){var element = parent as FrameworkElement;var mainWin = Application.Current.MainWindow;element.Height = mainWin.ActualHeight;element.Width = mainWin.ActualWidth;break;}}while (parent != null);}/// <summary>/// 构造函数/// </summary>public CusPopup(){Loaded += OnPopupLoaded;Unloaded += OnPopupUnloaded;}/// <summary>/// popup加载事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void OnPopupLoaded(object sender, RoutedEventArgs e){if (_alreadyLoaded)return;_alreadyLoaded = true;if (Child != null){Child.AddHandler(PreviewMouseLeftButtonDownEvent, new MouseButtonEventHandler(OnChildPreviewMouseLeftButtonDown), true);}_parentWindow = Window.GetWindow(this);if (IsMove)_parentWindow.LocationChanged += delegate{var offset = this.HorizontalOffset;this.HorizontalOffset = offset + 1;this.HorizontalOffset = offset;};if (_parentWindow == null)return;_parentWindow.Activated += OnParentWindowActivated;_parentWindow.Deactivated += OnParentWindowDeactivated;//SetPopupOwner();}private void OnPopupUnloaded(object sender, RoutedEventArgs e){if (_parentWindow == null)return;_parentWindow.Activated -= OnParentWindowActivated;_parentWindow.Deactivated -= OnParentWindowDeactivated;}private void SetPopupOwner(){if (this == null) return;var hwndSource = (PresentationSource.FromVisual(this)) as HwndSource;if (hwndSource == null) return;var hwnd = hwndSource.Handle;WindowInteropHelper helper = new WindowInteropHelper(_parentWindow);SetWindowLong(hwnd, -8, new IntPtr(helper.Handle.ToInt32()));}/// <summary>/// 主窗体激活事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void OnParentWindowActivated(object sender, EventArgs e){Debug.WriteLine("Parent Window Activated");SetTopmostState(true);}/// <summary>/// 主窗体不在激活状态事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void OnParentWindowDeactivated(object sender, EventArgs e){if (IsTopmost == false){SetTopmostState(IsTopmost);}}/// <summary>/// 子元素的鼠标左键按下事件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>void OnChildPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e){//SetTopmostState(true);if (IsHasTextBox){ActivatePopup();}else{if (!_parentWindow.IsActive && IsTopmost == false){_parentWindow.Activate();}}}/// <summary>/// IsTopmost属性改变事件/// </summary>/// <param name="obj"></param>/// <param name="e"></param>private static void OnIsTopmostChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e){var thisobj = (CusPopup)obj;thisobj.SetTopmostState(thisobj.IsTopmost);}/// <summary>/// 重写open事件/// </summary>/// <param name="e"></param>protected override void OnOpened(EventArgs e){//设置状态SetTopmostState(IsTopmost);base.OnOpened(e);}/// <summary>/// 设置置顶状态/// </summary>/// <param name="isTop"></param>private void SetTopmostState(bool isTop){// 如果状态与输入状态相同，则不要应用状态if (_appliedTopMost.HasValue && _appliedTopMost == isTop){return;}if (Child == null)return;var hwndSource = (PresentationSource.FromVisual(Child)) as HwndSource;if (hwndSource == null)return;var hwnd = hwndSource.Handle;RECT rect;if (!GetWindowRect(hwnd, out rect))return;Debug.WriteLine("setting z-order " + isTop);//设置所有者窗口,跟随其所有者窗口的Z序显示,避免失去焦点后被遮盖var windowHwnd = new WindowInteropHelper(_parentWindow).Handle;SetWindowLong(hwnd, -8, windowHwnd);if (isTop){SetWindowPos(hwnd, HWND_TOPMOST, rect.Left, rect.Top, (int)Width, (int)Height, TOPMOST_FLAGS);}else{/*z顺序只会在点击时得到刷新/反射标题栏（与外部的其他部分相对比窗口）除非我先将弹出窗口设置为hwndbottom然后HWND_TOP HWND_NOTOPMOST之前*/SetWindowPos(hwnd, HWND_BOTTOM, rect.Left, rect.Top, (int)Width, (int)Height, TOPMOST_FLAGS);SetWindowPos(hwnd, HWND_TOP, rect.Left, rect.Top, (int)Width, (int)Height, TOPMOST_FLAGS);SetWindowPos(hwnd, HWND_NOTOPMOST, rect.Left, rect.Top, (int)Width, (int)Height, TOPMOST_FLAGS);}_appliedTopMost = isTop;}[DllImport("USER32.DLL")]public static extern IntPtr SetFocus(IntPtr hWnd);/// <summary>/// 激活Pop（解决无法删除TextBox文字）/// </summary>/// <param name="popup"></param>public void ActivatePopup(){if (Child == null) return;//try to get a handle on the popup itself (via its child)HwndSource source = (HwndSource)PresentationSource.FromVisual(Child);IntPtr handle = source.Handle;//activate the popupSetFocus(handle);}#region P / Invoke 入口和定义[StructLayout(LayoutKind.Sequential)]public struct RECT{public int Left;public int Top;public int Right;public int Bottom;}[DllImport("user32.dll", SetLastError = true)]static extern int SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);[DllImport("user32.dll")][return: MarshalAs(UnmanagedType.Bool)]private static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);[DllImport("user32.dll")]private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X,int Y, int cx, int cy, uint uFlags);static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);static readonly IntPtr HWND_NOTOPMOST = new IntPtr(-2);static readonly IntPtr HWND_TOP = new IntPtr(0);static readonly IntPtr HWND_BOTTOM = new IntPtr(1);private const UInt32 SWP_NOSIZE = 0x0001;const UInt32 SWP_NOMOVE = 0x0002;const UInt32 SWP_NOZORDER = 0x0004;const UInt32 SWP_NOREDRAW = 0x0008;const UInt32 SWP_NOACTIVATE = 0x0010;const UInt32 SWP_FRAMECHANGED = 0x0020; /* The frame changed: send WM_NCCALCSIZE */const UInt32 SWP_SHOWWINDOW = 0x0040;const UInt32 SWP_HIDEWINDOW = 0x0080;const UInt32 SWP_NOCOPYBITS = 0x0100;const UInt32 SWP_NOOWNERZORDER = 0x0200; /* Don’t do owner Z ordering */const UInt32 SWP_NOSENDCHANGING = 0x0400; /* Don’t send WM_WINDOWPOSCHANGING */const UInt32 TOPMOST_FLAGS =SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOSIZE | SWP_NOMOVE | SWP_NOREDRAW | SWP_NOSENDCHANGING;#endregion
}

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WPF解决Popup窗口随动及显隐

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