CEdit and the Return key

[CodeBrain]

I have a single line edit control and a class derived from CEdit. Now I want that the CFormView class which contains the edit control gets informed if the user presses the Return key if the Edit control has the input focus. I've tried to react on the NM_RETURN notification in my form view but I don't get the event in the form view (must I use reflection in my edit class?). Then I tried to capture the VK_RETURN key in the OnChar method of my edit class, but the OnChar method seems not to get any VK_RETURN events. So what would be the best way to get my form view informed if the user presses the return key in my edit control? Thanks in advance.

[rrrado]

Try to set "Want return" style in resource editor for edit control, i think NM_RETURN could start working then

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rrrado

[Johann Gerell]

Subclass the edit control like this:

pOldEditWindowProc = (WNDPROC)::SetWindowLong(hWndEdit, GWL_WNDPROC, (LONG)EditWindowProc);
.
.
.
LRESULT CALLBACK EditWindowProc(HWND aHwnd, UINT aMsg, WPARAM aWp, LPARAM aLp)
{
if(Return was pressed) ::SendMessage(::GetParent(aHwnd), aMsg, aWp, aLp);

return ::CallWindowProc(pOldEditWindowProc, aHwnd, aMsg, aWp, aLp);

}

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[Roger Allen]

The other way to handle this is in PreTranslateMessage() if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN && GetFocus() == GetDlgItem(ID_OF_CONTROL)) { // handle it here! } Roger Allen Sonork 100.10016 Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003

[CodeBrain]

No luck, it seems not to work. I've already tried it and it makes no difference. The documentation also says that "Want return" only effects multiline edit controls.

[CodeBrain]

I have added some additional code, which seems to work now. But I still find it a bit ugly to perform the check in the application class. But that's ugly windows X| ;) Would be nice if someone could add feedback, if this code is correct or not, e.g. the CWinApp::PreTranslateMessage(pMsg); part. Thanks for your help! BOOL CMyApp::PreTranslateMessage(MSG* pMsg) { if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN)) { HWND hFocus = GetFocus(); CFrameWnd* pFrmWnd = dynamic_cast(GetMainWnd()); if (pFrmWnd == NULL) { ASSERT(FALSE); } CWnd* pTarget = pFrmWnd->GetActiveView()->GetDlgItem(IDC_EDIT_X); // We should test, if an active view exists, if we are not sure... HWND hTarget = NULL; if (pTarget != NULL) { hTarget = pTarget->GetSafeHwnd(); } if (hFocus == hTarget) { // Do what you want } return 1; } else { return CWinApp::PreTranslateMessage(pMsg); } }

[Ryan Binns]

I would have overridden PreTranslateMessage() in your edit control, and just sent a message to the parent:

BOOL CMyEdit::PreTranslateMessage(MSG *pMsg)
{
if((pMsg->message == WM_KEYDOWN) && (pMsg->wParam == VK_RETURN))
{
CWnd *pParent = GetParent();
if(pParent != NULL)
pParent->SendMessage(WM_KEYDOWN, VK_RETURN, pMsg->lParam);
}
else
return CEdit::PreTranslateMessage(pMsg);
}

And then just handle WM_KEYDOWN like normal in the parent and check for Enter being pressed. If you need to handle it in your main frame window, then use AfxGetMainWnd() instead of GetParent(). Ryan Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2nd April 2003, The Lounge)
Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

[CodeBrain]

Thank you for the hint, I will try it.