保持键盘焦点 [英] Keeping Keyboard Focus

问题描述

如何确保基于C ++ / MFC对话框的应用程序在运行时保持键盘焦点？我尝试使用SetWindowPos（）使主窗口位于最顶层，但是虽然它仍然位于其他窗口的顶部，但如果有人试图激活另一个应用程序，它仍然会失去键盘焦点。我必须点击我的应用程序标题栏才能重新获得键盘焦点。



谢谢



Tony

How can I ensure that my C++/MFC dialog based application keeps keyboard focus when it is running? I have tried making the main window topmost using SetWindowPos() but although it stays on top of other windows, it still looses keyboard focus if someone tries to activate another application. I have to click on my application's title bar to regain keyboard focus.

Thanks

Tony

推荐答案

你应该放松一个人激活另一个窗口的焦点，这是唯一有效的行为。您需要了解每个桌面只有一个聚焦窗口（子窗口，一个控件）。



但是，如果你认为焦点应该回到当窗口被激活时，以前集中控制，你是绝对正确的。



高级UI库总是会照顾它，但MFC不是其中之一。您可以通过处理Windows消息来实现此效果WM_ACTIVATE： https ：//msdn.microsoft.com/en-us/library/windows/desktop/ms646274%28v=vs.85%29.aspx [ ^ ]。



使用MFC，您可以使用 CWin：OnActivate ：https://msdn.microsoft.com/en-us/library/1f31c334.aspx [ ^ ]。

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谢谢。

-SA

You are supposed to loose focus of someone activates another window, this is the only valid behavior. You need to understand that there is only one focused window (child window, a control) per desktop.

However, if you think that the focus should get back to the previously focused control when a window is activated, you are absolutely right.

High-level UI libraries always take care of that, but MFC is not one of them. You can achieve this effect by handling windows message WM_ACTIVATE: https://msdn.microsoft.com/en-us/library/windows/desktop/ms646274%28v=vs.85%29.aspx[^].

With MFC, you can use CWin:OnActivate: https://msdn.microsoft.com/en-us/library/1f31c334.aspx[^].

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