webbrowser无法响应快捷键、按键消息

最新推荐文章于 2020-01-07 16:51:26 发布

转载最新推荐文章于 2020-01-07 16:51:26 发布 · 2.2k 阅读

文章标签：

#webbrowser #keyboard #dialog #mfc #browser

本文介绍了一个简单的解决方案，用于使嵌入在对话框中的WebBrowser能够响应键盘输入，如回车键、Tab键及快捷键等。通过修改对话框的PreTranslateMessage函数，允许将键盘消息传递给具有焦点的ActiveX控件。

添加到对话框里的webbrowser无法响应键盘的按键消息，如：回车、快捷键、tab等

网上找到了个简单的方法：http://www.codeproject.com/KB/wtl/wtl4mfc6.aspx

方法在“Keyboard Handling”这一节，翻译过来就是：

问题原因：对话框使用IsDialogMessage来处理了所有的键盘消息，这样webbrowser就无法得到响应的键盘消息了

解决方法：在对话框的PreTranslateMessage里发送WM_FORWARDMSG消息，普通的窗口因无法识别这个消息而自动忽略，但是获得焦点(has the focus)的ActiveX控件能正确识别这个消息并看看是否要对这个消息进行处理

代码：

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BOOL CMainDlg::PreTranslateMessage(MSG* pMsg)
{
// This was stolen from an SDI app using a form view.
//
// Pass keyboard messages along to the child window that has the focus.
// When the browser has the focus, the message is passed to its containing
// CAxWindow, which lets the control handle the message.
if((pMsg->message < WM_KEYFIRST || pMsg->message > WM_KEYLAST) &&
(pMsg->message < WM_MOUSEFIRST || pMsg->message > WM_MOUSELAST))
return FALSE;
HWND hWndCtl = ::GetFocus();
if(IsChild(hWndCtl))
{
// find a direct child of the dialog from the window that has focus
while(::GetParent(hWndCtl) != m_hWnd)
hWndCtl = ::GetParent(hWndCtl);
// give control a chance to translate this message
if(::SendMessage(hWndCtl, WM_FORWARDMSG, 0, (LPARAM)pMsg) != 0)
return TRUE;
}
// A normal control has the focus, so call IsDialogMessage() so that
// the dialog shortcut keys work (TAB, etc.)
return IsDialogMessage(pMsg);
}

BOOL CMainDlg::PreTranslateMessage(MSG* pMsg)
{
    // This was stolen from an SDI app using a form view.
    //
    // Pass keyboard messages along to the child window that has the focus.
    // When the browser has the focus, the message is passed to its containing
    // CAxWindow, which lets the control handle the message.
    if((pMsg->message < WM_KEYFIRST || pMsg->message > WM_KEYLAST) &&
       (pMsg->message < WM_MOUSEFIRST || pMsg->message > WM_MOUSELAST))
        return FALSE;
	HWND hWndCtl = ::GetFocus();
	
    if(IsChild(hWndCtl))
        {
        // find a direct child of the dialog from the window that has focus
        while(::GetParent(hWndCtl) != m_hWnd)
            hWndCtl = ::GetParent(hWndCtl);
        // give control a chance to translate this message
        if(::SendMessage(hWndCtl, WM_FORWARDMSG, 0, (LPARAM)pMsg) != 0)
            return TRUE;
        }
    // A normal control has the focus, so call IsDialogMessage() so that
    // the dialog shortcut keys work (TAB, etc.)
    return IsDialogMessage(pMsg);
}

这个是wtl代码，mfc的应该也差不多

添加这个代码后webbrowser里的回车、tab、快捷键都能正常响应了