WPF自定义Popup窗口随动非顶层不屏蔽输入法

2016-11-16 18:56:56来源:CSDN作者:u012559285人点击

第七城市

    做小项目的时候用到了Popup,但是原生的Popup为最顶层页面,屏蔽输入法不说,还不会自动随窗口移动更新位置。网上方案有很多,这里整理下方便各位码农们使用,废话不多说,直接上干货!

class PopubEx : Popup    {        /// <summary>        /// 是否窗口随动,默认为随动(true)        /// </summary>        public bool IsPositionUpdate        {            get { return (bool)GetValue(IsPositionUpdateProperty); }            set { SetValue(IsPositionUpdateProperty, value); }        }        public static readonly DependencyProperty IsPositionUpdateProperty =            DependencyProperty.Register("IsPositionUpdate", typeof(bool), typeof(PopubEx), new PropertyMetadata(true, new PropertyChangedCallback(IsPositionUpdateChanged)));        private static void IsPositionUpdateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)        {            (d as PopubEx).pup_Loaded(d as PopubEx, null);        }        /// <summary>        /// 加载窗口随动事件        /// </summary>        public PopubEx()        {            this.Loaded += pup_Loaded;        }        /// <summary>        /// 加载窗口随动事件        /// </summary>        private void pup_Loaded(object sender, RoutedEventArgs e)        {            Popup pup = sender as Popup;            var win = VisualTreeHelper.GetParent(pup);            while (win != null && (win as Window) == null)            {                win = VisualTreeHelper.GetParent(win);            }            if ((win as Window) != null)            {                (win as Window).LocationChanged -= PositionChanged;                if (IsPositionUpdate)                    (win as Window).LocationChanged += PositionChanged;            }        }        /// <summary>        /// 刷新位置        /// </summary>        private void PositionChanged(object sender, EventArgs e)        {            var method = typeof(Popup).GetMethod("UpdatePosition", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);            if (this.IsOpen)            
               method.Invoke(this, null);        }        //是否最前默认为非最前(false)        public static DependencyProperty TopmostProperty = Window.TopmostProperty.AddOwner(typeof(Popup), new FrameworkPropertyMetadata(false, OnTopmostChanged));        public bool Topmost        {            get { return (bool)GetValue(TopmostProperty); }            set { SetValue(TopmostProperty, value); }        }        private static void OnTopmostChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)        {            (obj as PopubEx).UpdateWindow();        }        /// <summary>        /// 重写拉开方法,置于非最前        /// </summary>        /// <param name="e"></param>        protected override void OnOpened(EventArgs e)        {            UpdateWindow();        }        /// <summary>        /// 刷新Popup层级        /// </summary>        private void UpdateWindow()        {            var hwnd = ((HwndSource)PresentationSource.FromVisual(this.Child)).Handle;            RECT rect;            if (NativeMethods.GetWindowRect(hwnd, out rect))            {                NativeMethods.SetWindowPos(hwnd, Topmost ? -1 : -2, rect.Left, rect.Top, (int)this.Width, (int)this.Height, 0);            }        }        [StructLayout(LayoutKind.Sequential)]        public struct RECT        {            public int Left;            public int Top;            public int Right;            public int Bottom;        }        #region P/Invoke imports & definitions        public static class NativeMethods        {            [DllImport("user32.dll")]            [return: MarshalAs(UnmanagedType.Bool)]            internal static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);            [DllImport("user32", EntryPoint = "SetWindowPos")]            internal static extern int SetWindowPos(IntPtr hWnd, int hwndInsertAfter, int x, int y, int cx, int cy, int wFlags);        }        #endregion    }
    默认设置为窗口随动,非顶层。快去试试吧!

第七城市

最新文章

123

最新摄影

微信扫一扫

第七城市微信公众平台