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Capturing clicks and double-clicks in Rich Edit controls

Posted on 1998-08-24
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Last Modified: 2013-11-20
Environment: VC++ 5.0, Win NT 4.0

I am writing an application using Rich Edit controls in a modal dialog box.  I want to capture when the user clicks or doubleclicks on the Rich Edit control, but have so far been unable to do this.  When I do this with CEdit's, it works right away, so I must have to do something more than simply adding the function OnClickRichEdit through the dialog editor.  What can I do?

/Claus
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Question by:Claus
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2 Comments
 
LVL 1

Accepted Solution

by:
amby earned 50 total points
ID: 1321213
A solution is to define a new window proc for your control in your application...

example:
--------

long OldWndProc;

CMyDialog::InitDialog(...)
{
  //... Code Before

  OldWndProc=SetWindowLong(m_MyRichEdit.m_hWnd, GWL_WNDPROC, (long) NewWndProc);

  //... Code After
}

LRESULT CALLBACK NewWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
  // this is the new wnd proc
  switch (uMsg) {

  case WM_LBUTTONDOWN:
    //... code
    break;

  case WM_LBUTTONUP:
    //... code
    break;
  }

  return CallWindowProc((WNDPROC)OldWndProc, hwnd, uMsg, wParam, lParam);
}

another solution is to make a class derived from CRichEditControl but someone here has already done this and it is really lot of work

in this second case, you declare

class CMyRichEditControl : public CRichEditControl
{
  ...

  // Generated message map functions
  //{{AFX_MSG(CMyRichEditControl)
    afx_msg MYRETVAL OnlButtonDown(WPARAM, LPARAM ); // added manually
    ...
  //}}AFX_MSG
  DECLARE_MESSAGE_MAP()
};

in the definition file:
-----------------------

BEGIN_MESSAGE_MAP(CMyRichEditControl, CRichEditControl)
  //{{AFX_MSG_MAP(CMixerMainDlg)
  ON_MESSAGE(WM_LBUTTONDOWN, OnlButtonDown)
END_MESSAGE_MAP()

MYRETVAL CMyRichEditControl::OnlButtonDown(WPARAM wParam, LPARAM lParam)
{
  //... blah blah
}


I prefer first solution...
0
 

Author Comment

by:Claus
ID: 1321214
I found a better solution myself in the meantime.  I can catch the messages in the PreTranslateMessage of the main dialog box.  The code looks somewhat like this:

BOOL CTbuilderDlg::PreTranslateMessage(MSG* pMsg)
{
      CRichEditCtrl *sub;

      sub = (CRichEditCtrl *)GetDlgItem(IDC_SUB2);

      switch ( pMsg->message)
      {
            case WM_LBUTTONDBLCLK:
                  if (pMsg->hwnd == sub->m_hWnd)
                        MessageBox("", "", MB_OK);
                  break;
      }

      return CDialog::PreTranslateMessage(pMsg);
}

/Claus

0

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