内容 如果对某个 Visual 使用 PresentationSource.FromVisual 方法获取 HwndSource 内容,获取到的返回是空值。...= (HwndSource) PresentationSource.FromVisual(TextBox1); // not null var hwndSource2 = (HwndSource...(hwndSource2 is null) { throw new ArgumentNullException(nameof(hwndSource2...)); } } 执行代码,可以看到,可以从放入到 Grid 里的 TextBox1 拿到 HwndSource 内容。...为 Visible 即可让放入到 UserControl 的控件拿到 HwndSource 内容 因此,如果发现从某个 Visual 上,尝试获取 HwndSource 内容失败,可以看看此控件所在的视觉树上是否被放入到
EventArgs e) { if (WpfModalDialogFixer.Current.Enable) { HwndSource...src = HwndSource.FromVisual(Application.Current.MainWindow) as HwndSource; if (src !...foreach (Window w in Application.Current.Windows) { HwndSource...src = HwndSource.FromVisual(w) as HwndSource; if (src !...src = HwndSource.FromVisual(Application.Current.MainWindow) as HwndSource; if (src !
InputManager inputManager, PresentationSource inputSource) { } internal void UnRegisterHwndForInput(HwndSource...(this) 获取,上面的 this 需要一个在界面显示的元素 而 HwndSource 可以使用下面代码获取 var windowInteropHelper = new WindowInteropHelper...(this); var hwndSource = HwndSource.FromHwnd(windowInteropHelper.Handle); 先调用 UnRegisterHwndForInput...= HwndSource.FromHwnd(windowInteropHelper.Handle); var unRegisterHwndForInputMethodInfo...BindingFlags.NonPublic); unRegisterHwndForInputMethodInfo.Invoke(stylusLogic, new object[] {hwndSource
MainWindow_Loaded(object sender, RoutedEventArgs e) { IntPtr hWnd = IntPtr.Zero; //获取 WPF 窗口的句柄 HwndSource...hwndSource = PresentationSource.FromVisual(this) as HwndSource; if (hwndSource !...= null) { hWnd = hwndSource.Handle; } if (hWnd !
使用 HwndSource 将 WPF 嵌入到 Win32 窗口 HwndSource 会生成一个可以嵌入 WPF 的 Win32 窗口,使用 HwndSource.RootVisual 添加一个 WPF...ParentWindow = new IntPtr(-3), // message only WindowStyle = 1073741824 }; var hwndSource...= new HwndSource(p) { RootVisual = element, SizeToContent = SizeToContent.Manual,...}; hwndSource.CompositionTarget.BackgroundColor = Colors.White; return hwndSource.Handle
User32.dll")] public static extern IntPtr SetFocus(IntPtr hWnd); IntPtr GetHwnd(Popup popup) { HwndSource...source = (HwndSource)PresentationSource.FromVisual(popup.Child); return source.Handle; } private...extern bool SetForegroundWindow(IntPtr hWnd); public static void ActivatePopup(Popup popup) { HwndSource...source = (HwndSource)PresentationSource.FromVisual(popup.Child); IntPtr handle = source.Handle;...source = (HwndSource)PresentationSource.FromVisual(popup.Child); return source.Handle; } 在 TextBox
User32.dll")] public static extern IntPtr SetFocus(IntPtr hWnd); IntPtr GetHwnd(Popup popup) { HwndSource...source = (HwndSource)PresentationSource.FromVisual(popup.Child); return source.Handle; } private...extern bool SetForegroundWindow(IntPtr hWnd); public static void ActivatePopup(Popup popup) { HwndSource...source = (HwndSource)PresentationSource.FromVisual(popup.Child); IntPtr handle = source.Handle;
= HwndSource.FromHwnd(hwnd); //获取当前窗口的位置大小状态并保存 var placement = new...= HwndSource.FromHwnd(hwnd); if (hwndSource?....return; } var hwndSource = HwndSource.FromHwnd(hwnd);...return; } var hwndSource = HwndSource.FromHwnd(hwnd);...= HwndSource.FromHwnd(hwnd); if (hwndSource?.
_hwndSource; private bool _isUpdatingCompositionWindow; 这里有一个细节是 ImmGetDefaultIMEWnd 也许会返回 0x00...进行获取,这里的 HwndSource 就相当于或者说大多数时候是等于 Editor 所在的窗口 _hwndSource = (HwndSource) (PresentationSource.FromVisual...否则微软拼音输入法将在屏幕的左上角上 RefreshInputMethodEditors(); // 尝试通过 _hwndSource...刚好 WPF 对接了 _previousContext = IMENative.ImmAssociateContext(_hwndSource.Handle, _currentContext...source = _hwndSource; var textEditorLeftTop = Editor.GetTextEditorLeftTop();
使用方法很简单,在 Loaded 之后,添加下面代码 HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource;...HwndTarget hwndTarget = hwndSource.CompositionTarget; hwndTarget.RenderMode = RenderMode.SoftwareOnly
originOffsetX, out int originOffsetY) { Point originScreenCoord = new Point(); HwndSource...hwndSource = PresentationSource.FromVisual(_source.Value.RootVisual) as HwndSource; if (...hwndSource !...= null) { HandleRef handleRef = new HandleRef(hwndSource, hwndSource.CriticalHandle
WispLogic.RegisterHwndForInput(InputManager inputManager, PresentationSource inputSource) HwndStylusInputProvider..ctor(HwndSource...source) HwndSource.Initialize(HwndSourceParameters parameters) HwndSource..ctor(HwndSourceParameters
UpdateScreenInfo(this); } private void UpdateScreenInfo(Window window) { var hwndSource...= (HwndSource)PresentationSource.FromVisual(window); if (hwndSource is null)...{ return; } var hWnd = hwndSource.Handle; var screen
WPF 中可以使用 HwndSource 来包装一个 WPF 控件到 Win32 窗口,使用自定义的继承自 HwndHost 的类可以把 Win32 窗口包装成 WPF 控件。...原因和解决办法 此异常的原因非常简单,是 HwndSource 的 BuildWindowCore 的返回值有问题。具体来说,就是子窗口的句柄返回了 0。...WS_CHILD | WS_CLIPCHILDREN), TreatAncestorsAsNonClientArea = true, }; var source = new HwndSource
线程更快进入此函数,在首次触摸时,让 PresentationSource 参数为空,从而无法获取到正确的值进行计算,从而计算触摸点由于缺少参数,在 DPI 非 96 情况下偏移 DPI 比例 var hwndSource...= source as HwndSource; Matrix toDevice = Matrix.Identity; if (hwndSource?...._transformToDeviceMatrices.ContainsKey(hwndSource.CompositionTarget.CurrentDpiScale)) {...] = hwndSource.CompositionTarget.TransformToDevice; Debug.Assert(_transformToDeviceMatrices...[hwndSource.CompositionTarget.CurrentDpiScale]; } return toDevice; } 问题已反馈给 WPF 官方:
minimizeButton; private Button _restoreButton; private Button _closeButton; private HwndSource..._hwndSource; private void InitializeControl() { ControlTemplate template...private void MainWindow_SourceInitialized(object sender, EventArgs e) { _hwndSource...= (HwndSource)PresentationSource.FromVisual(this); } private void MinimizeButton_Click...); private void ResizeWindow(ResizeDirection direction) { SendMessage(_hwndSource.Handle
>(); var source = (HwndSource) PresentationSource.FromVisual(window);... public async void Attach(AppBarEdge value) { var hwndSource... public async void Update(AppBarEdge value) { var hwndSource.../// public async void Detach() { var hwndSource =...= _hwndSourceTask.Task.Result; var bounds = TransformToAppBar(hwndSource.Handle
windowInteropHelper = new WindowInteropHelper(this); var hwnd = windowInteropHelper.Handle; HwndSource...source = HwndSource.FromHwnd(hwnd); source.AddHook(Hook); } private IntPtr
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