private void EnsureDestroyed()
{
if (_timer is not null)
{
_timer.Dispose();
_timer = null;
}
if (_tipWindow is not null)
{
_tipWindow.DestroyHandle();
_tipWindow = null;
}
// Hide the window and invalidate the parent to ensure
// that we leave no visual artifacts. given that we
// have a bizarre region window, this is needed.
User32.SetWindowPos(
new HandleRef(this, Handle),
User32.HWND_TOP,
_windowBounds.X,
_windowBounds.Y,
_windowBounds.Width,
_windowBounds.Height,
User32.SWP.HIDEWINDOW | User32.SWP.NOSIZE | User32.SWP.NOMOVE);
_parent?.Invalidate(true);
DestroyHandle();
}
// will destroy the tipWindow
public void Destroy()
{
Debug.Assert(tipWindow != null, "how can one destroy a null window");
tipWindow.DestroyHandle();
tipWindow = null;
}
//==============================================================
/// <summary>
/// 通过向指定的按键发送KeyUp来恢复状态
/// </summary>
/// <param name="c"></param>
/// <param name="allKeys"></param>
public static void TryResetKeys(params IEnumerable<VirtualKeyCode>[] allKeys)
{
var dummyWnd = new NativeWindow();
try
{
//如果被系统或者杀毒软件阻止， 则发送给自己的一个窗口，这样避免被在此拦截。
dummyWnd.CreateHandle(new CreateParams(){ExStyle = (int) (User32.WS_EX.WS_EX_LAYERED | User32.WS_EX.WS_EX_TOOLWINDOW)});
User32.ShowWindow(dummyWnd.Handle, User32.SW.SW_SHOWNORMAL);
var sim = new InputSimulator();
sim.Keyboard.Sleep(10);
foreach (var keys in allKeys)
{
foreach (var k in keys)
{
User32.SetForegroundWindow(dummyWnd.Handle);
sim.Keyboard.KeyUp(k);
}
}
}
catch (Exception)
{
Debug.WriteLine("恢复键盘状态失败");
#if TEST
throw;
#endif
}
finally
{
dummyWnd.DestroyHandle();
}
}
