Re: How to resize an Custom class derived from CEdit when it reaches its max text limit?

Try this class, it's pretty much what Joe suggested with a few minor fixes.

#pragma once

// CDSEdit

class CDSEdit : public CEdit
{
   DECLARE_DYNAMIC(CDSEdit)

public:
   CDSEdit();
   virtual ~CDSEdit();

protected:
   afx_msg void OnEnUpdate();
   DECLARE_MESSAGE_MAP()
};

//////////////////////////////////////////////////////////////////////
// DSEdit.cpp : implementation file
//
#include "stdafx.h"
#include "DSEdit.h"

// CDSEdit

IMPLEMENT_DYNAMIC(CDSEdit, CEdit)
CDSEdit::CDSEdit()
{
}

CDSEdit::~CDSEdit()
{
}

BEGIN_MESSAGE_MAP(CDSEdit, CEdit)
   ON_CONTROL_REFLECT(EN_UPDATE, OnEnUpdate)
END_MESSAGE_MAP()

// CDSEdit message handlers

void CDSEdit::OnEnUpdate()
{
   CClientDC dc(this);

   //Get the margins
   DWORD Margin = GetMargins();
   WORD LMargin = LOWORD(Margin);
   WORD RMargin = HIWORD(Margin);

   //get the size of the text
   CFont *pOldFont = dc.SelectObject(GetFont());
   CString Str;
   GetWindowText(Str);
   CSize sz = dc.GetTextExtent(Str);
   dc.SelectObject(pOldFont);

   //get the inside size of the edit
   CRect Rect;
   GetRect(&Rect);

   //get the external size of the edit
   CRect WRect;
   GetWindowRect(&WRect);

   //if the size of the edit is different than the size of the
   //text then resize.
   //NOTE: you might want to set a limit to how small it gets
   if ((sz.cx + LMargin + RMargin) != Rect.Width())
   {
      WRect.right += (sz.cx + LMargin + RMargin) - Rect.Width();

      SetWindowPos(NULL, 0, 0, WRect.Width(), WRect.Height(), SWP_NOMOVE |
SWP_NOZORDER);
   }
}

AliR.

<sujeet27kulk@gmail.com> wrote in message
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