edit_cr.shtml
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<html><head><meta HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><meta NAME="Author" CONTENT="Guy Gascoigne - Piggford"><title>Controls - Eating returns in a single line edit</title></head><body background="../fancyhome/back.gif" bgcolor="#FFFFFF" link="#B50029" vlink="#8E2323"alink="#FF0000" bgproperties="fixed"><table WIDTH="100%"> <tr WIDTH="100%"> <td><!--#exec cgi="/cgi/ads.cgi"--></td> <td></td> </tr></table><h3 align="center"><font COLOR="#AOAO99">Eating returns in a single line edit</font></h3><hr align="center"><p>This code was contributed by <a HREF="mailto:Petr.Novotny@antek.cz">Petr Novotny</a><!-- start --><p>I was quite frustrated in my app - I have a dialog with a few single-line edit controls; after updating the edits, when I pressed Enter the dialog was closed (IDOK was the default button)."Want return" option is unfortunately valid only for multiline edits.</p><p>Here is my fix:</p><p>I override PreTranslateMessage. If there is WM_KEYDOWN with VK_ENTER going to the edit, I set the focus to the default button and discard the message. If the dialog has no defualt button, I let VK_ENTER through - no problem this time.</p><p>I check if the window is an editbox by calling GetClassName and comparing the return value to "Edit". There are much more possibilities - comparing the FromHandle(hwnd) to array of CWnd*, to array of IDs (comparing to GetDlgItem() return values) etc.</p><p>For the code to be completely correct, it should check for the edit's windows style and it should not act if it is multi-line, want-return edit. [I haven't done that as I don't use multiline edits.]</p><p>1. To your override of CDialog, add the following method:</p><pre><tt><FONT COLOR="#990000"> virtual BOOL PreTranslateMessage(MSG *);</pre></tt></font><p>2. Implement this function, for example:</p><pre><tt><FONT COLOR="#990000">BOOL CMyDialog::PreTranslateMessage(MSG *pMsg){ if (pMsg->message==WM_KEYDOWN && pMsg->wParam==VK_RETURN) { DWORD def_id=GetDefID(); if (def_id!=0) { CWnd *wnd=FromHandle(pMsg->hwnd); // you may implement other ways of testing, e.g. // comparing to array of CWnd*, comparing to array of IDs etc. char class_name[16]; if (GetClassName(wnd->GetSafeHwnd(),class_name,sizeof(class_name))!=0) { if (strnicmp(class_name,"edit",5)==0) { GetDlgItem(LOWORD(def_id))->SetFocus(); return TRUE; // discard the message! } } } } // be a good citizen - call the base class return CDialog::PreTranslateMessage(pMsg);}</pre></tt></font><!-- end --><p>Posted on: April 11, 98. </p><hr><table BORDER="0" WIDTH="100%"> <tr> <td WIDTH="33%"><font SIZE="-1"><a HREF="http://www.codeguru.com">Goto HomePage</a></font> </td> <td WIDTH="33%"><p align="center"><font SIZE="-2">⌨️ 快捷键说明
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