问题描述

我的应用程序收到越来越多的请求，要求某些对话框的行为类似于 Mac OS X Document modal Sheet 功能，其中对话框仅对父控件/对话框而不是整个应用程序是模态的(参见 http://en.wikipedia.org/wiki/Window_dialog).

My application has been getting more and more requests to have certain dialogs behave similar to Mac OS X Document modal Sheet functionality, where a dialog is modal to just the parent control/dialog, and not the whole application (see http://en.wikipedia.org/wiki/Window_dialog).

当前窗口 ShowDialog() 不足以满足我的应用程序的需要，因为我需要让一个对话框成为应用程序中另一个对话框的模态，但仍允许用户访问应用程序的其他区域.

Current windows ShowDialog() is insufficient for the needs of my application, as I need to have a dialog be modal to another dialog in the application, but still allow the user to access other areas of the application.

C# .NET 中是否有与 Document modal Sheet 等效的功能?甚至是某人已经完成的紧密实现，还是我自己尝试实现此功能?我尝试搜索 Google 和 SO 无济于事.

Is there an equivalent to Document modal Sheet in C# .NET? Or even a close implementation someone has done, or am I on my own to try and implement this functionality? I tried searching Google and SO to no avail.

谢谢，

凯尔

推荐答案

重新审视这个问题后，我做了一些挖掘，发现了一个可以满足我需求的混合解决方案.

After revisiting this issue, I did some digging and found a hybrid solution that will work for my needs.

我接受了 p-daddy 的建议:https://stackoverflow.com/a/428782/654244

我使用 hans-passant:https://stackoverflow.com/a/3344276/654244

结果如下:

const int GWL_STYLE   = -16;
const int WS_DISABLED = 0x08000000;

public static int GetWindowLong(IntPtr hWnd, int nIndex)
{
    if (IntPtr.Size == 4)
    {
        return GetWindowLong32(hWnd, nIndex);
    }
    return GetWindowLongPtr64(hWnd, nIndex);
}

public static int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong)
{
    if (IntPtr.Size == 4)
    {
        return SetWindowLong32(hWnd, nIndex, dwNewLong);
    }
    return SetWindowLongPtr64(hWnd, nIndex, dwNewLong);
}

[DllImport("user32.dll", EntryPoint = "GetWindowLong", CharSet = CharSet.Auto)]
private static extern int GetWindowLong32(IntPtr hWnd, int nIndex);

[DllImport("user32.dll", EntryPoint = "GetWindowLongPtr", CharSet = CharSet.Auto)]
private static extern int GetWindowLongPtr64(IntPtr hWnd, int nIndex);

[DllImport("user32.dll", EntryPoint = "SetWindowLong", CharSet = CharSet.Auto)]
private static extern int SetWindowLong32(IntPtr hWnd, int nIndex, int dwNewLong);

[DllImport("user32.dll", EntryPoint = "SetWindowLongPtr", CharSet = CharSet.Auto)]
private static extern int SetWindowLongPtr64(IntPtr hWnd, int nIndex, int dwNewLong);


public static void SetNativeEnabled(IWin32Window control, bool enabled)
{
    if (control == null || control.Handle == IntPtr.Zero) return;

        NativeMethods.SetWindowLong(control.Handle, NativeMethods.GWL_STYLE, NativeMethods.GetWindowLong(control.Handle, NativeMethods.GWL_STYLE) &
            ~NativeMethods.WS_DISABLED | (enabled ? 0 : NativeMethods.WS_DISABLED));
}

public static void ShowChildModalToParent(IWin32Window parent, Form child)
{
    if (parent == null || child == null) return;

    //Disable the parent.
    SetNativeEnabled(parent, false);

    child.Closed += (s, e) =>
    {
        //Enable the parent.
        SetNativeEnabled(parent, true);
    };

    child.Show(parent);
}

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