我在WPF中的自定义窗口（AllowTransparency，WindowStyle = None）有问题。 DragMove（）方法效果很好，但是当我最大化窗口，或者它通过Windows 7 Aero Snap自动最大化时，此方法根本不起作用。所以我无法用鼠标拖动来取消窗口并将其状态返回到WindowState.Normal。左右Aero Snap工作正常，我可以快速捕捉和取消窗口。但是当它最大化时，除了Win + Down组合之外没有任何作用。也许有人知道如何解决这个问题，或者我在哪里可以通过工作的Aero Snap功能找到其他方法来实现自定义窗口的正确DragMove？
这是我的方法。尽量缩短）））
private void InitHeader()
{
var border = Find<Border>("borderHeader");
var restoreIfMove = false;
border.MouseLeftButtonDown += (s, e) =>
{
if (e.ClickCount == 2)
{
if ((ResizeMode == ResizeMode.CanResize) ||
(ResizeMode == ResizeMode.CanResizeWithGrip))
{
SwitchState();
}
}
else
{
if (WindowState == WindowState.Maximized)
{
restoreIfMove = true;
}
DragMove();
}
};
border.MouseLeftButtonUp += (s, e) =>
{
restoreIfMove = false;
};
border.MouseMove += (s, e) =>
{
if (restoreIfMove)
{
restoreIfMove = false;
var mouseX = e.GetPosition(this).X;
var width = RestoreBounds.Width;
var x = mouseX - width / 2;
if (x < 0)
{
x = 0;
}
else
if (x + width > screenSize.X)
{
x = screenSize.X - width;
}
WindowState = WindowState.Normal;
Left = x;
Top = 0;
DragMove();
}
};
}
private void SwitchState()
{
switch (WindowState)
{
case WindowState.Normal:
{
WindowState = WindowState.Maximized;
break;
}
case WindowState.Maximized:
{
WindowState = WindowState.Normal;
break;
}
}
}
（要获得屏幕尺寸，我使用原生方法）
Groaner的解决方案无法在多个监视器设置下正常运行，尤其是在主监视器不是最左侧的情况下。
这是我的解决方案，基于他的正确处理单个或多个显示器设置。在此代码中，'rctHeader'是在XAML中定义的Rectangle。
private bool mRestoreIfMove = false;
public MainWindow()
{
InitializeComponent();
}
private void SwitchWindowState()
{
switch (WindowState)
{
case WindowState.Normal:
{
WindowState = WindowState.Maximized;
break;
}
case WindowState.Maximized:
{
WindowState = WindowState.Normal;
break;
}
}
}
private void rctHeader_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (e.ClickCount == 2)
{
if ((ResizeMode == ResizeMode.CanResize) || (ResizeMode == ResizeMode.CanResizeWithGrip))
{
SwitchWindowState();
}
return;
}
else if (WindowState == WindowState.Maximized)
{
mRestoreIfMove = true;
return;
}
DragMove();
}
private void rctHeader_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
mRestoreIfMove = false;
}
private void rctHeader_MouseMove(object sender, MouseEventArgs e)
{
if (mRestoreIfMove)
{
mRestoreIfMove = false;
double percentHorizontal = e.GetPosition(this).X / ActualWidth;
double targetHorizontal = RestoreBounds.Width * percentHorizontal;
double percentVertical = e.GetPosition(this).Y / ActualHeight;
double targetVertical = RestoreBounds.Height * percentVertical;
WindowState = WindowState.Normal;
POINT lMousePosition;
GetCursorPos(out lMousePosition);
Left = lMousePosition.X - targetHorizontal;
Top = lMousePosition.Y - targetVertical;
DragMove();
}
}
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GetCursorPos(out POINT lpPoint);
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
public int X;
public int Y;
public POINT(int x, int y)
{
this.X = x;
this.Y = y;
}
}
}
在WPF中，我强烈建议在Control.PointToScreen之前恢复窗口时使用Window.DragMove。 PointToScreen还将处理多个显示器设置。这将简化还原到以下内容：
private void OnMouseLeftButtonDown( object sender, MouseButtonEventArgs e )
{
if( e.ClickCount == 2 )
{
if( ResizeMode != ResizeMode.CanResize &&
ResizeMode != ResizeMode.CanResizeWithGrip )
{
return;
}
WindowState = WindowState == WindowState.Maximized
? WindowState.Normal
: WindowState.Maximized;
}
else
{
mRestoreForDragMove = WindowState == WindowState.Maximized;
DragMove();
}
}
private void OnMouseMove( object sender, MouseEventArgs e )
{
if( mRestoreForDragMove )
{
mRestoreForDragMove = false;
var point = PointToScreen( e.MouseDevice.GetPosition( this ) );
Left = point.X - ( RestoreBounds.Width * 0.5 );
Top = point.Y;
WindowState = WindowState.Normal;
DragMove();
}
}
private void OnMouseLeftButtonUp( object sender, MouseButtonEventArgs e )
{
mRestoreForDragMove = false;
}
private bool mRestoreForDragMove;
另一个答案有点晚了，但我的代码更简单，所以我会把它放在这里。正如你所做的那样，左右对齐的工作正常，但是当窗口最大化或捕捉到上部屏幕边界并最大化时，DragMove方法将无效！
只需处理要拖动的元素上的Mouse_Down事件，如下所示：
private void TitleBar_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (WindowState == WindowState.Maximized)
{
var point = PointToScreen(e.MouseDevice.GetPosition(this));
if (point.X <= RestoreBounds.Width / 2)
Left = 0;
else if (point.X >= RestoreBounds.Width)
Left = point.X - (RestoreBounds.Width - (this.ActualWidth - point.X));
else
Left = point.X - (RestoreBounds.Width / 2);
Top = point.Y - (((FrameworkElement)sender).ActualHeight / 2);
WindowState = WindowState.Normal;
}
DragMove();
}
我希望它对某人有所帮助！
Drag Move（）方法仅适用于表单的标题栏，因此使用：
[DllImport("user32.dll")]
public static extern IntPtr SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam);
public static void StartDrag(Window window)
{
WindowInteropHelper helper = new WindowInteropHelper(window);
SendMessage(helper.Handle, 161, 2, 0);
}
别忘了添加System.Windows.Interop