双击WPF中的窗口标题栏后如何防止MouseUp事件？

Question

如果用户双击窗口标题栏以最大化窗口，则窗口将在第二次单击的 MouseDown 事件时最大化，但同一第二次单击时的 MouseUp 事件将由窗口中的一个控件注册现在在光标下并触发用户不想要的东西。 如何预防？

Answer 1

这应该可以正常工作：

解决方案：

  //WNDPROC INTEROP
        private const int WM_NCLBUTTONDBLCLK = 0x00A3;

        protected override void OnSourceInitialized(EventArgs e)
        {
            base.OnSourceInitialized(e);
            HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
            source.AddHook(WndProc);
        }

   private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        //TITLE BAR DOUBLE CLICK
        if (msg == WM_NCLBUTTONDBLCLK)
        {
            Console.WriteLine("titlebar double click  " + this.WindowState);

            //WINDOW ABOUT TO GET MAXIMIZED
            if (msg == WM_NCLBUTTONDBLCLK) 
                handleNextMouseup = true;

            else if (msg == 0x202) //  mouseup     
            {        
                if (handleNextMouseup) 
                    handled = true;      
                
                handleNextMouseup = false;     
            } 
        }

        return IntPtr.Zero;
    }

另一种可能的解决方案：

  //WNDPROC INTEROP
        private const int WM_NCLBUTTONDBLCLK = 0x00A3;

        protected override void OnSourceInitialized(EventArgs e)
        {
            base.OnSourceInitialized(e);
            HwndSource source = PresentationSource.FromVisual(this) as HwndSource;
            source.AddHook(WndProc);
        }

        private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
        {
            //TITLE BAR DOUBLE CLICK
            if (msg == WM_NCLBUTTONDBLCLK)
            {
                Console.WriteLine("titlebar double click  " + this.WindowState);

                //WINDOW ABOUT TO GET MAXIMIZED
                if (this.WindowState == WindowState.Normal)
                {
                    fakehittestvisible = true;

                }
            }

            return IntPtr.Zero;
        }


        private bool fakehittestvisible = false;

        //ON PREVIEW MOUSE UP ABORT IF MIXIMIZING HAPPENED
        private void this_PreviewMouseUp(object sender, MouseButtonEventArgs e)
        {
            if (fakehittestvisible)
            {
                e.Handled = true;
                fakehittestvisible = false;
                return;
            }

            fakehittestvisible = false;
            Console.WriteLine("this mouse up state is " + this.WindowState);
        }