Question

我正在构建一个 WPF 4.5应用程序，它具有控件，可以让用户“锁定”并“解锁”应用程序的高度。

为了锁定高度，我正在关注StackOverflow answer regarding setting the MinHeight and MaxHeight to the same value。

为了解锁高度，我设置了MinHeight=0和MaxHeight=double.PositiveInfinity

这一切似乎都运转正常。

我遇到的问题是我无法解决的问题是，当高度为“已锁定”时，当鼠标悬停在应用程序窗口的右边缘时，光标将变为水平调整大小光标。

有没有办法可以禁用它，以便光标保持为WPF中的常规指针？

我在WPF 4.5上。

我看到这篇文章的答案显示了如何在Win32中执行此操作：WPF: Make window unresizeable, but keep the frame?。

这篇文章已经超过3年了，我只是想知道（希望）自那以后WPF可能已经发展了。

非常感谢你！

菲利普

Answer 1

在启动窗口（MainWindow.xaml）上，尝试对Window的ResizeMode属性进行绑定，然后在不希望它可调整大小时将其修改为“NoResize”。要使其可调整大小，请将其更改为“CanResize”。

希望有所帮助！

Answer 2

您需要设置MinWidth = MaxWidth = Width =您想要的宽度，如StackOverflow answer regarding setting the MinHeight and MaxHeight to the same value中所述。

此外，您需要为窗口挂钩winproc并处理 WM_NCHITTEST 消息。

#region Vertical Resize Only

// ReSharper disable InconsistentNaming
private const int WM_NCHITTEST = 0x0084;
private const int HTBORDER = 18;
private const int HTBOTTOM = 15;
private const int HTBOTTOMLEFT = 16;
private const int HTBOTTOMRIGHT = 17;
private const int HTLEFT = 10;
private const int HTRIGHT = 11;
private const int HTTOP = 12;
private const int HTTOPLEFT = 13;
private const int HTTOPRIGHT = 14;

[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr DefWindowProc(
    IntPtr hWnd,
    int msg,
    IntPtr wParam,
    IntPtr lParam);

// ReSharper restore InconsistentNaming

#endregion Vertical Resize Only

public CanConfigurationDialog()
{
    InitializeComponent();
    Loaded += MainWindowLoaded;
}


#region Vertical Resize Only

private void MainWindowLoaded(object sender, RoutedEventArgs e)
{
    try
    {
        // Obtain the window handle for WPF application
        var mainWindowPtr = new WindowInteropHelper(this).Handle;
        var mainWindowSrc = HwndSource.FromHwnd(mainWindowPtr);
        mainWindowSrc?.AddHook(WndProc);
    }
    catch (Exception)
    {
        ;
    }
}

private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
    // Override the window hit test
    // and if the cursor is over a resize border,
    // return a standard border result instead.
    if (msg == WM_NCHITTEST)
    {
        handled = true;
        var htLocation = DefWindowProc(hwnd, msg, wParam, lParam).ToInt32();
        switch (htLocation)
        {
            case HTTOP:
            case HTTOPLEFT:
            case HTTOPRIGHT:
                htLocation = HTTOP;
                break;

            case HTBOTTOM:
            case HTBOTTOMLEFT:
            case HTBOTTOMRIGHT:
                htLocation = HTBOTTOM;
                break;

            case HTLEFT:
            case HTRIGHT:
                htLocation = HTBORDER;
                break;
        }

        return new IntPtr(htLocation);
    }

    return IntPtr.Zero;
}

#endregion Vertical Resize Only

这将阻止显示水平调整大小光标！ Q.E.D。

WPF窗口固定宽度鼠标光标

2 个答案: