关于在COM组件中 ATL/WTL使用webbroswer控件无法响应Ctrl+A Ctrl+V Ctrl+C及回车键的处理

本文链接：https://blog.youkuaiyun.com/abesky/article/details/5391919

本文介绍如何在ATL/WTL窗口中的WebBrowser控件启用Ctrl+C/V/A等快捷键功能。通过自定义CHTMLWin类及钩子处理消息转发，确保WebBrowser能够响应这些快捷键。

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如果在COM组件中ATL/WTL窗口中使用了webbroswer控件，这时默认情况下是无法响应Ctrl+A Ctrl+V Ctrl+C等快捷键的

so我以CDialogImpl类为例子说明

首先创建webbroswer控件使用一个包装类

class CHTMLWin : public CWindowImpl< CHTMLWin, CAxWindow> { ::ATL::CComPtr<IWebBrowser2> m_pBrowserApp; // Message map and handlers BEGIN_MSG_MAP(CHTMLWin) MESSAGE_HANDLER(WM_CREATE, OnCreate) END_MSG_MAP() virtual void OnFinalMessage(HWND /*hWnd*/) { delete this; } BOOL PreTranslateMessage(MSG* pMsg) { if((pMsg->message < WM_KEYFIRST || pMsg->message > WM_KEYLAST) && (pMsg->message < WM_MOUSEFIRST || pMsg->message > WM_MOUSELAST)) return FALSE; BOOL bRet = FALSE; // give HTML page a chance to translate this message if(pMsg->hwnd == m_hWnd || IsChild(pMsg->hwnd)) bRet = (BOOL)SendMessage(WM_FORWARDMSG, 0, (LPARAM)pMsg); return bRet; } LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/) { LRESULT lRet = DefWindowProc(uMsg, wParam, lParam); // Connect events HRESULT hRet = QueryControl(IID_IWebBrowser2, (void**)&m_pBrowserApp); if(SUCCEEDED(hRet)) { if(FAILED(DispEventAdvise(m_pBrowserApp, &DIID_DWebBrowserEvents2))) ATLASSERT(FALSE); } // Set host flag to indicate that we handle themes CComPtr<IAxWinAmbientDispatch> spHost; hRet = QueryHost(IID_IAxWinAmbientDispatch, (void**)&spHost); if(SUCCEEDED(hRet)) { hRet = spHost->put_DocHostFlags(DOCHOSTUIFLAG_NO3DBORDER | DOCHOSTUIFLAG_THEME); ATLASSERT(SUCCEEDED(hRet)); } //lRet = LoadSourceHtm() ? 0 : -1; return lRet; } virtual void OnFinalMessage(HWND /*hWnd*/) { delete this; } }

在对话框中

HHOOK hHook = NULL; class CHTMLDlg : public CDialogImpl<CHTMLDlg >, public CMessageFilter, public CIdleHandler { ...... CString m_strResourceURL; CHTMLWin *m_pHTML ; static CHTMLDlg* m_pThis; // 使用钩子来处理转发消息 static LRESULT FAR PASCAL MsgProc(int nCode, WPARAM wParam, LPARAM lParam) { LPMSG lpMsg = (LPMSG) lParam; if ( nCode >= 0 && PM_REMOVE == wParam ) { if ( (lpMsg->message != WM_CHAR && lpMsg->message >= WM_KEYFIRST && lpMsg->message <= WM_KEYLAST) ) { if (m_pThis->PreTranslateMessage(lpMsg)) // 调用CDialogImpl中的PreTranslateMessage，很重要以实现快捷键响应 { lpMsg->hwnd = NULL; lpMsg->message = WM_NULL; lpMsg->lParam = 0; lpMsg->wParam = 0; } } } return CallNextHookEx(hHook, nCode, wParam, lParam); } virtual BOOL PreTranslateMessage(MSG* pMsg) { if (pMsg->message==WM_KEYDOWN && pMsg->wParam == 0x0D) pMsg->message = WM_CHAR; // 将回车转为此种消息以使webbrowser处理 if (m_pHTML && m_pHTML->PreTranslateMessage(pMsg) ) return TRUE; return CWindow::IsDialogMessage(pMsg); } virtual BOOL OnIdle() { return FALSE; } LRESULT OnInitDialog(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) { bHandled = TRUE; m_pThis = this; CString szModule; if (GetModuleFileName(_AtlBaseModule.m_hInst, szModule.GetBuffer(_MAX_PATH), _MAX_PATH)) { m_strResourceURL.Format(_T("res://%s/%d"), szModule, IDR_HTML1); // 资源中的网页 } szModule.ReleaseBuffer(); // 创建网页控件 m_pHTML = new CHTMLWin; m_pHTML->Create(m_hWnd, 0, m_strResourceURL); // m_strResourceURL可以替换为其它URL地址，但必须是URL以确保创建网页控件 hHook = SetWindowsHookEx( WH_GETMESSAGE, MsgProc, NULL, GetCurrentThreadId() ); return 1; // Let the system set the focus } ..... }

其他钩子的释放不再列出....

其实主要是需要在消息循环中筛选消息向webbroswer窗口发送消息

处理方式为::SendMessage(hWndCtl, WM_FORWARDMSG, 0, (LPARAM)pMsg);

以便使webbroswer控件有机会转换处理；