如何处理 CEdit 控件中的 Return 键?

2022-01-12 00:00:00 windows c++ mfc cedit

如何处理 CEdit 控件中的 Return 键 (VK_RETURN)?CEdit 控件的父级是 CDialog.

How can I handle the Return key (VK_RETURN) in a CEdit control? The CEdit control is parented to a CDialog.

推荐答案

您还可以在对话框的 PreTranslateMessage 中过滤键.如果您得到 VK_RETURN 的 WM_KEYDOWN，请调用 GetFocus.如果焦点在您的编辑控件上，请调用您对编辑控件中按下的返回的处理.

You could also filter for the key in your dialog's PreTranslateMessage. If you get WM_KEYDOWN for VK_RETURN, call GetFocus. If focus is on your edit control, call your handling for return pressed in the edit control.

注意 if 中的子句顺序依赖于短路是有效的.

Note the order of clauses in the if relies on short-circuiting to be efficient.

BOOL CMyDialog::PreTranslateMessage(MSG* pMsg)
{
    if (pMsg->message == WM_KEYDOWN &&
        pMsg->wParam == VK_RETURN &&
        GetFocus() == m_EditControl)
    {
        // handle return pressed in edit control
        return TRUE; // this doesn't need processing anymore
    }
    return FALSE; // all other cases still need default processing
}

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