中望CAD 注册钩子，实现点击命令行选项自动输入

在这里插入图片描述

在中望CAD2018、2019中还未实现通过点击命令行直接输入命令的效果（如上图）。于是自己试着实现玩玩，完成后发出来分享一下。

//只需在初始化时注册钩子
acedRegisterFilterWinMsg(toCaps);

BOOL toCaps(MSG* pMsg)
{
	if (pMsg->message == WM_LBUTTONDOWN)
	{
		CWnd *pWnd = acedGetAcadDockCmdLine();
		HWND hwnd = ::FindWindowEx(pWnd->m_hWnd, NULL, NULL, _T("CommandLine"));//借助spy++查看
		//点击了命令行
		if (pMsg->hwnd == hwnd)
		{
			CPoint ptLeftClk = pMsg->pt;;
			CString sCmdText;
  			CWnd *pCmdWnd = CWnd::FromHandle(hwnd);
			pCmdWnd->GetWindowTextW(sCmdText);
			
			HDC hDC = ::GetDC(hwnd);
			CDC dc;
			dc.Attach(hDC);
			int index = sCmdText.Find(_T("/"));
			std::map<CString, CPoint> mapOptions;

			int size1 = 0;
			int size2;
			CString sOption;
			while (index != -1)
			{
				size2 = dc.GetOutputTextExtent(sCmdText.Left(index+4)).cx;
				sOption = sCmdText.GetAt(index - 2);
				mapOptions[sOption] = CPoint(size1, size2);
				size1 = size2;
				index = sCmdText.Find(_T("/"),index+1);
			}
			size2 = dc.GetOutputTextExtent(sCmdText).cx;
			if (sCmdText.Find(L"[") != -1)
			{
				sOption = sCmdText.GetAt(sCmdText.ReverseFind(_T(']')) - 2);
				mapOptions[sOption] = CPoint(size1, size2);
			}

			dc.Detach();

			CRect rc;
			::GetWindowRect(hwnd, rc);
			rc.right = rc.left + size2;

			if (rc.PtInRect(ptLeftClk))
			{
				int nResult = ptLeftClk.x - rc.left;
				std::map<CString, CPoint>::iterator iter;
				for (iter = mapOptions.begin(); iter != mapOptions.end(); iter++)
				{
					if (nResult >= (iter->second.x) && nResult <= (iter->second.y))
					{
						acDocManager->sendStringToExecute(curDoc(), iter->first + L" ");
						break;
					}
				}
			}
		}
	}
	return FALSE;
}