Banner Control

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• Download source - 9.14 Kb

Introduction

In my opinion the worst things in programming are really useful interface making. Therefore the using of existing solutions is preferable. But sometimes we need to realize our own one because found solutions can't achieve desirable results. I hope that this application allows people to simplify his or her life and work.

Background

In my work I have needed to use banner control. In Code Project I quickly found solutions of PaulWendt and Peter Mares and decided to combine their solutions.

Using the code

This application demonstrates banner control with docked possibility and font orientation according to docked position. By form controls we may to change scrolling speed and manipulate banner database with text attributes changing and banner positioning.

I have made orientation addition in class CMultiColorStatic

int CMultiColorStatic::GetOrientation()
{ return m_iOrientation;}

void CMultiColorStatic::SetOrientation(int iOrientation)
{ m_iOrientation = iOrientation; Invalidate(); }

Also I have added consequent insertions in Paint function in

CBannerStatic

void CBannerStatic::OnPaint()
{
   CPaintDC dc(this);
      
   CRect rcBounds = m_rcBounds;      
   if(GetOrientation()==ORIENTATION_HORIZONTAL) 
     rcBounds.left = m_nTextOut;
   if(GetOrientation()==ORIENTATION_VERTICAL_LEFT) 
     rcBounds.bottom = m_rcBounds.Height()-m_nTextOut;
   if(GetOrientation()==ORIENTATION_VERTICAL_RIGHT) 
     rcBounds.top = m_nTextOut;
   dc.FillRect(m_rcBounds, &m_brBackGround);
   dc.IntersectClipRect(m_rcBounds); 

   m_nTextLength = 0;

   for (int i = 0; i < m_astrData.GetSize(); i++)
   {
      CColorString* pstrCurrent = 
        reinterpret_cast<CColorString*>(m_astrData.GetAt(i));
      TEXTMETRIC    stFontMetrics;
      SIZE          stSize;

      DetermineFont(pstrCurrent);

      dc.SelectObject(&m_ftText)->DeleteObject();
    if (pstrCurrent->GetBackColor() == ::GetSysColor(COLOR_BTNFACE))
      {
         dc.SetBkColor(m_crBackColor);
      }
      else
      {
         dc.SetBkColor(pstrCurrent->GetBackColor());
      }
    dc.SetTextColor(pstrCurrent->GetColor());
    dc.GetOutputTextMetrics(&stFontMetrics);

      GetTextExtentPoint32(dc.GetSafeHdc(), 
          *pstrCurrent, pstrCurrent->GetLength(), &stSize);

      if(GetOrientation()==ORIENTATION_VERTICAL_LEFT) 
      {
        dc.MoveTo(rcBounds.left, rcBounds.Height());
        dc.SetTextAlign( TA_UPDATECP);
      }
    if(GetOrientation()==ORIENTATION_VERTICAL_RIGHT)
    {
       dc.MoveTo(rcBounds.Width(),rcBounds.top);
         dc.SetTextAlign( TA_UPDATECP);
       }
       dc.DrawText(*pstrCurrent, rcBounds, DT_LEFT);
    
       if(GetOrientation()==ORIENTATION_HORIZONTAL) 
          rcBounds.left += stSize.cx + stFontMetrics.tmOverhang;
       if(GetOrientation()==ORIENTATION_VERTICAL_LEFT) 
          rcBounds.bottom -= stSize.cx + stFontMetrics.tmOverhang;
       if(GetOrientation()==ORIENTATION_VERTICAL_RIGHT) 
          rcBounds.top += stSize.cx + stFontMetrics.tmOverhang;

       m_nTextLength += stSize.cx + stFontMetrics.tmOverhang;
  }
}

Points of Interest

I don't understand why system font has not changed according to given orientation. I had no time to clear this situation and I had used other fonts.

void CMultiColorStatic::DetermineFont(const CColorString* const pstrData)
{
   LOGFONT stFont;

   m_ftText.DeleteObject();

   //---------------------------------------------------
   // set up the font based on pstrData
   //
   /*if (!GetFont()->GetLogFont(&stFont))
   {    
     memset(&stFont, 0, sizeof(stFont));

     stFont.lfWidth = ((stFont.lfHeight * 7) / 16);
     stFont.lfPitchAndFamily = VARIABLE_PITCH | FF_SWISS;
   }*/
  CFont font;  
  font.CreatePointFont(110, _T("Tahoma Bold"));
  font.GetLogFont(&stFont);
  font.DeleteObject();
  stFont.lfWidth = ((stFont.lfHeight * 12) / 16);
  stFont.lfPitchAndFamily = DEFAULT_PITCH | FF_SWISS;
  if (m_fAutoSize)
  {
    if(GetOrientation()==ORIENTATION_HORIZONTAL) stFont.lfHeight = 
         m_rcBounds.Height();
    if(GetOrientation()==ORIENTATION_VERTICAL_LEFT) stFont.lfHeight = 
         m_rcBounds.Width();
    if(GetOrientation()==ORIENTATION_VERTICAL_RIGHT) stFont.lfHeight = 
         m_rcBounds.Width();
  }
  
  if(GetOrientation()==ORIENTATION_HORIZONTAL) 
    stFont.lfEscapement = stFont.lfOrientation = 0;
  if(GetOrientation()==ORIENTATION_VERTICAL_LEFT) 
    stFont.lfEscapement = stFont.lfOrientation = 900;
  if(GetOrientation()==ORIENTATION_VERTICAL_RIGHT) 
    stFont.lfEscapement = stFont.lfOrientation = -900;
  stFont.lfWeight = (pstrData->GetBold() ? FW_HEAVY : FW_NORMAL);
  stFont.lfUnderline = pstrData->GetUnderlined();
  stFont.lfItalic = pstrData->GetItalic();
  stFont.lfQuality = PROOF_QUALITY;
  m_ftText.CreateFontIndirect(&stFont);
}

History

I think it is the first contribution to CodeProject on my banner theme.