由于IsHitTestVisible="False"禁用了所有鼠标交互,似乎没有任何干净的方法来解决这个问题。我尝试了以下方法:
- 在OnPreviewMouseDown中设置IsHitTestVisible="False",然后使用UIAutomation重新单击装饰器,但不起作用
- 将Opacity绑定到Adorner下面的“不可见”元素,以便单击可以通过。它确实通过了,但是问题在下一级上是相同的,所以不起作用。
看起来唯一让其正常工作的方法就是在OnMouseDown中设置IsHitTestVisible="False",然后使用SendInput模拟新的MouseClick。虽然不太美观,但能完成任务。
protected override void OnMouseDown(MouseButtonEventArgs e)
{
IsHitTestVisible = false;
Action action = () =>
{
MouseSimulator.ClickLeftMouseButton();
IsHitTestVisible = true;
};
this.Dispatcher.BeginInvoke(action, DispatcherPriority.ContextIdle);
}
public class MouseSimulator
{
[DllImport("user32.dll", SetLastError = true)]
static extern uint SendInput(uint nInputs, ref INPUT pInputs, int cbSize);
[StructLayout(LayoutKind.Sequential)]
struct INPUT
{
public SendInputEventType type;
public MouseKeybdhardwareInputUnion mkhi;
}
[StructLayout(LayoutKind.Explicit)]
struct MouseKeybdhardwareInputUnion
{
[FieldOffset(0)]
public MouseInputData mi;
[FieldOffset(0)]
public KEYBDINPUT ki;
[FieldOffset(0)]
public HARDWAREINPUT hi;
}
[StructLayout(LayoutKind.Sequential)]
struct KEYBDINPUT
{
public ushort wVk;
public ushort wScan;
public uint dwFlags;
public uint time;
public IntPtr dwExtraInfo;
}
[StructLayout(LayoutKind.Sequential)]
struct HARDWAREINPUT
{
public int uMsg;
public short wParamL;
public short wParamH;
}
struct MouseInputData
{
public int dx;
public int dy;
public uint mouseData;
public MouseEventFlags dwFlags;
public uint time;
public IntPtr dwExtraInfo;
}
[Flags]
enum MouseEventFlags : uint
{
MOUSEEVENTF_MOVE = 0x0001,
MOUSEEVENTF_LEFTDOWN = 0x0002,
MOUSEEVENTF_LEFTUP = 0x0004,
MOUSEEVENTF_RIGHTDOWN = 0x0008,
MOUSEEVENTF_RIGHTUP = 0x0010,
MOUSEEVENTF_MIDDLEDOWN = 0x0020,
MOUSEEVENTF_MIDDLEUP = 0x0040,
MOUSEEVENTF_XDOWN = 0x0080,
MOUSEEVENTF_XUP = 0x0100,
MOUSEEVENTF_WHEEL = 0x0800,
MOUSEEVENTF_VIRTUALDESK = 0x4000,
MOUSEEVENTF_ABSOLUTE = 0x8000
}
enum SendInputEventType : int
{
InputMouse,
InputKeyboard,
InputHardware
}
public static void ClickLeftMouseButton()
{
INPUT mouseDownInput = new INPUT();
mouseDownInput.type = SendInputEventType.InputMouse;
mouseDownInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTDOWN;
SendInput(1, ref mouseDownInput, Marshal.SizeOf(new INPUT()));
INPUT mouseUpInput = new INPUT();
mouseUpInput.type = SendInputEventType.InputMouse;
mouseUpInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTUP;
SendInput(1, ref mouseUpInput, Marshal.SizeOf(new INPUT()));
}
}