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 popup
SetFocus(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
}