Re: SS_RIGHT and SS_OWNERDRAW

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 5 Dec 2008 14:11:06 -0600

Message-ID:

<0Wf_k.6225$hc1.6144@flpi150.ffdc.sbc.com>

Wow that is interesting. DrawItem never gets called when SS_RIGHT is
specified. I haven't been able to find anything on this.

As a work-around, you can do the same thing in OnPaint without ownerdraw.

#pragma once

class CMyStatic : public CStatic
{
public:
    CMyStatic();
    ~CMyStatic();
protected:
   afx_msg void OnPaint();
   DECLARE_MESSAGE_MAP()
};

CMyStatic::CMyStatic()
{
}

CMyStatic::~CMyStatic()
{
}

BEGIN_MESSAGE_MAP(CMyStatic, CStatic)
   ON_WM_PAINT()
END_MESSAGE_MAP()

void CMyStatic::OnPaint()
{
   CPaintDC dc(this); // device context for painting
   CRect Rect;
   GetClientRect(&Rect);
   switch (GetStyle() & SS_TYPEMASK)
   {
   // If SS_LEFT is specified, draw red
   case SS_LEFT:
      dc.FillSolidRect(&Rect, RGB(255, 0, 0));
      break;

   // If SS_CENTER is specified, draw green
   case SS_CENTER:
      dc.FillSolidRect(&Rect, RGB(0, 255, 0));
      break;

   // If SS_RIGHT is specified, draw blue
   case SS_RIGHT:
      dc.FillSolidRect(&Rect, RGB(0, 0, 255));
      break;

   // Anything else, draw black
   default:
      dc.FillSolidRect(&Rect, RGB(0, 0, 0));
      break;
   }
}

AliR.

"none" <none@none.none> wrote in message
news:Xns9B6B81D591E3Cnonenonenone@69.16.186.8...

"AliR $VC++ MVP$" <AliR@online.nospam> wrote:

Can you post the entire CMyStatic class? It looks like the problem is
in there!

I was hoping that was the case, but I don't think that's possible.
Below is code that reproduces the problem. When run, the code draws a
red rectangle, a green rectangle, and that's it. The third one doesn't
draw in blue or black -- it just doesn't draw at all. But the Create()
call does not fail. If I set a breakpoint inside the "case" statement
for SS_RIGHT, it never breaks. The "case" statements for both SS_LEFT
and SS_CENTER are both hit repeatedly.

----- MyStatic.h -----

#pragma once
#include "afxwin.h"

class CMyStatic : public CStatic
{
public:

   CMyStatic();
   ~CMyStatic();

protected:

   DWORD m_static_style;

   void PreSubclassWindow();
   afx_msg void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
};

----- MyStatic.cpp -----

#include "StdAfx.h"
#include "CMyStatic.h"

CMyStatic::CMyStatic()
{
   m_static_style = SS_CENTER;
}

CMyStatic::~CMyStatic()
{
}

void CMyStatic::PreSubclassWindow()
{
   CStatic::PreSubclassWindow();

   m_static_style = GetStyle() & SS_TYPEMASK;

   ModifyStyle(0, SS_OWNERDRAW);
}

void CMyStatic::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
   CDC* dc = CDC::FromHandle(lpDrawItemStruct->hDC);

   switch (m_static_style)
   {
   // If SS_LEFT is specified, draw red
   case SS_LEFT:
       dc->FillSolidRect(&lpDrawItemStruct->rcItem, RGB(255, 0, 0));
       break;

   // If SS_CENTER is specified, draw green
   case SS_CENTER:
       dc->FillSolidRect(&lpDrawItemStruct->rcItem, RGB(0, 255, 0));
       break;

   // If SS_RIGHT is specified, draw blue
   case SS_RIGHT:
       dc->FillSolidRect(&lpDrawItemStruct->rcItem, RGB(0, 0, 255));
       break;

   // Anything else, draw black
   default:
       dc->FillSolidRect(&lpDrawItemStruct->rcItem, RGB(0, 0, 0));
       break;
   }
}

----- Code in the parent dialog class -----

// The rest of this class is just the automatically generated
// code from the MFC app wizard, aside from the addition of
// the declarations of m_label_1, m_label_2, and m_label_3.

void CMyStaticDlg::OnCreateStatics()
{
   m_label_1.Create("1", WS_CHILD | WS_VISIBLE | SS_LEFT,
                    CRect(0, 10, 100, 25), this);
   m_label_2.Create("2", WS_CHILD | WS_VISIBLE | SS_CENTER,
                    CRect(0, 30, 100, 45), this);
   m_label_3.Create("3", WS_CHILD | WS_VISIBLE | SS_RIGHT,
                    CRect(0, 50, 100, 65), this);
}