求教多显示器下WPF自定义窗体的最大化问题！！！

cronos00 2015-11-26 09:57:06

问题是这样的，设置了WindowStyle="None" AllowsTransparency="True"之后，自己做了个标题栏，实现了缩放与最大化问题，但是最大化时会遮住任务栏。
然后就上网查了下，这个问题还是很好解决的。
但是。。在多显示器情况下不行了
如果副显示器的分辨率比主显示器分辨率高的话，最大化时窗体仍然会盖住副显示器的任务栏。
下面上最大化的解决代码，求大神指教。。

this.SourceInitialized += MainWindow_SourceInitialized;

void MainWindow_SourceInitialized(object sender, EventArgs e)

        {

            HwndSource source = HwndSource.FromHwnd(new WindowInteropHelper(this).Handle);

            if (source == null)

                // Should never be null  

                throw new Exception("Cannot get HwndSource instance.");



            source.AddHook(new HwndSourceHook(this.WndProc));

        }

private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)

        {



            switch (msg)

            {

                case Win32.WM_GETMINMAXINFO: // WM_GETMINMAXINFO message  

                    WmGetMinMaxInfo(hwnd, lParam);

                    handled = true;

                    break;

              //  case Win32.WM_NCHITTEST: // WM_NCHITTEST message  

                //    return WmNCHitTest(lParam, ref handled);

            }



            return IntPtr.Zero;  

        }



 private void WmGetMinMaxInfo(IntPtr hwnd, IntPtr lParam)

        {

            // MINMAXINFO structure  

            Win32.MINMAXINFO mmi = (Win32.MINMAXINFO)Marshal.PtrToStructure(lParam, typeof(Win32.MINMAXINFO));



            // Get handle for nearest monitor to this window  

            WindowInteropHelper wih = new WindowInteropHelper(this);

            IntPtr hMonitor = Win32.MonitorFromWindow(wih.Handle, Win32.MONITOR_DEFAULTTONEAREST);



            // Get monitor info  

            Win32.MONITORINFOEX monitorInfo = new Win32.MONITORINFOEX();

            monitorInfo.cbSize = Marshal.SizeOf(monitorInfo);

            Win32.GetMonitorInfo(new HandleRef(this, hMonitor), monitorInfo);



            // Get HwndSource  

            HwndSource source = HwndSource.FromHwnd(wih.Handle);

            if (source == null)

                // Should never be null  

                throw new Exception("Cannot get HwndSource instance.");

            if (source.CompositionTarget == null)

                // Should never be null  

                throw new Exception("Cannot get HwndTarget instance.");



            // Get transformation matrix  

            Matrix matrix = source.CompositionTarget.TransformFromDevice;



            // Convert working area  

            Win32.RECT workingArea = monitorInfo.rcWork;

            Point dpiIndependentSize =

                matrix.Transform(new Point(

                        workingArea.Right - workingArea.Left,

                        workingArea.Bottom - workingArea.Top

                        ));



            // Convert minimum size  

            Point dpiIndenpendentTrackingSize = matrix.Transform(new Point(

                this.MinWidth,

                this.MinHeight

                ));



            // Set the maximized size of the window  

            mmi.ptMaxSize.x = (int)dpiIndependentSize.X;

            mmi.ptMaxSize.y = (int)dpiIndependentSize.Y;



            // Set the position of the maximized window  

            mmi.ptMaxPosition.x = 0;

            mmi.ptMaxPosition.y = 0;



            // Set the minimum tracking size  

            mmi.ptMinTrackSize.x = (int)dpiIndenpendentTrackingSize.X;

            mmi.ptMinTrackSize.y = (int)dpiIndenpendentTrackingSize.Y;



            Marshal.StructureToPtr(mmi, lParam, true);

        }

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Veary 2015-12-02

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善用shell

cronos00 2015-11-26

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继续补充，分别设置两个显示器为主显示器，在断点下可以看到最后mmi里面的数据是一模一样的。但是显示却有问题，，不知道为什么了

cronos00 2015-11-26

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补充下，副显示器的任务栏被盖住，所以宽度上就会超出屏幕，显示不全了。不然盖住任务栏也无所谓了。

exception92 2015-11-26

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这是我处理全屏的代码，可以实现分屏效果，你可以看着改改试试。


已 2个Form 窗口显示到 2个显示屏为例，在App 的cs代码中    重载OnStartup 方法：
frmNameSpace= System.Windows.Forms;

 protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);
            MainWindow mainWindow = new MainWindow();
            MainGreenRoomWindow maintainWindow = new MainGreenRoomWindow();
            if (frmNameSpace.Screen.AllScreens != null && frmNameSpace.Screen.AllScreens.Count() == 2)
            {
                frmNameSpace.Screen sRight = frmNameSpace.Screen.AllScreens[0];
                frmNameSpace.Screen sLeft = frmNameSpace.Screen.AllScreens[1];
                Rectangle rectLeft = sRight.WorkingArea;
                Rectangle rectRight = sLeft.WorkingArea;
                mainWindow.Width = rectRight.Width;
                mainWindow.Height = rectRight.Height;
                maintainWindow.Top = rectLeft.Top;
                maintainWindow.Left = rectLeft.Left + 3; 
                //maintainWindow.Width = rectLeft.Width;
                //maintainWindow.Height = rectLeft.Height;
                mainWindow.Show();
                maintainWindow.Show();
                if (mainWindow != null)
                {
                    maintainWindow.Owner = mainWindow;
                }

            }
            else
            {
                MessageBox.Show("请确保屏幕为双屏模式。");
                Application.Current.Shutdown();
            }
        }
第一屏窗口  设置全屏:
 private void SetFullScreen()
        {
            this.WindowState = System.Windows.WindowState.Maximized;
            this.WindowStyle = System.Windows.WindowStyle.None;
            this.ResizeMode = System.Windows.ResizeMode.NoResize;
            this.Left = 0.0;
            this.Top = 0.0;
        }



第二屏窗口  设置全屏:
 /// <summary>
        /// 设置全屏
        /// </summary>
        private void SetFullScreen()
        {
            this.WindowStyle = System.Windows.WindowStyle.None;
            this.ResizeMode = System.Windows.ResizeMode.NoResize;
            this.Left = 0.0;
            this.Top = 0.0;
        }
以上SetFullScreen()方法  均放置在 窗口 构造函数中

cronos00 2015-11-26