draw.cpp

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///////////////////////////////////////////////////////////////////////////////
//
// Draw.cpp : implementation file
//
///////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "Tools.h"
#include "Draw.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

///////////////////////////////////////////////////////////////////////////////
HLSCOLOR RGB2HLS (COLORREF rgb)
{
    unsigned char minval = min(GetRValue(rgb), min(GetGValue(rgb), GetBValue(rgb)));
    unsigned char maxval = max(GetRValue(rgb), max(GetGValue(rgb), GetBValue(rgb)));
    float mdiff  = float(maxval) - float(minval);
    float msum   = float(maxval) + float(minval);
   
    float luminance = msum / 510.0f;
    float saturation = 0.0f;
    float hue = 0.0f; 

    if ( maxval != minval )
    { 
        float rnorm = (maxval - GetRValue(rgb)  ) / mdiff;      
        float gnorm = (maxval - GetGValue(rgb)) / mdiff;
        float bnorm = (maxval - GetBValue(rgb) ) / mdiff;   

        saturation = (luminance <= 0.5f) ? (mdiff / msum) : (mdiff / (510.0f - msum));

        if (GetRValue(rgb) == maxval) hue = 60.0f * (6.0f + bnorm - gnorm);
        if (GetGValue(rgb) == maxval) hue = 60.0f * (2.0f + rnorm - bnorm);
        if (GetBValue(rgb) == maxval) hue = 60.0f * (4.0f + gnorm - rnorm);
        if (hue > 360.0f) hue = hue - 360.0f;
    }
    return HLS ((hue*255)/360, luminance*255, saturation*255);
}

///////////////////////////////////////////////////////////////////////////////
static BYTE _ToRGB (float rm1, float rm2, float rh)
{
  if      (rh > 360.0f) rh -= 360.0f;
  else if (rh <   0.0f) rh += 360.0f;
 
  if      (rh <  60.0f) rm1 = rm1 + (rm2 - rm1) * rh / 60.0f;   
  else if (rh < 180.0f) rm1 = rm2;
  else if (rh < 240.0f) rm1 = rm1 + (rm2 - rm1) * (240.0f - rh) / 60.0f;      
                   
  return (BYTE)(rm1 * 255);
}

///////////////////////////////////////////////////////////////////////////////
COLORREF HLS2RGB (HLSCOLOR hls)
{
    float hue        = ((int)HLS_H(hls)*360)/255.0f;
    float luminance  = HLS_L(hls)/255.0f;
    float saturation = HLS_S(hls)/255.0f;

    if ( saturation == 0.0f )
    {
        return RGB (HLS_L(hls), HLS_L(hls), HLS_L(hls));
    }
    float rm1, rm2;
     
    if ( luminance <= 0.5f ) rm2 = luminance + luminance * saturation;  
    else                     rm2 = luminance + saturation - luminance * saturation;
    rm1 = 2.0f * luminance - rm2;   
    BYTE red   = _ToRGB (rm1, rm2, hue + 120.0f);   
    BYTE green = _ToRGB (rm1, rm2, hue);
    BYTE blue  = _ToRGB (rm1, rm2, hue - 120.0f);

    return RGB (red, green, blue);
}

///////////////////////////////////////////////////////////////////////////////
COLORREF HLS_TRANSFORM (COLORREF rgb, int percent_L, int percent_S)
{
    HLSCOLOR hls = RGB2HLS (rgb);
    BYTE h = HLS_H(hls);
    BYTE l = HLS_L(hls);
    BYTE s = HLS_S(hls);

    if ( percent_L > 0 )
    {
        l = BYTE(l + ((255 - l) * percent_L) / 100);
    }
    else if ( percent_L < 0 )
    {
        l = BYTE((l * (100+percent_L)) / 100);
    }
    if ( percent_S > 0 )
    {
        s = BYTE(s + ((255 - s) * percent_S) / 100);
    }
    else if ( percent_S < 0 )
    {
        s = BYTE((s * (100+percent_S)) / 100);
    }
    return HLS2RGB (HLS(h, l, s));
}


///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
CBufferDC::CBufferDC (HDC hDestDC, const CRect& rcPaint) : m_hDestDC (hDestDC)
{
    if ( rcPaint.IsRectEmpty() )
    {
        ::GetClipBox (m_hDestDC, m_rect);
    }
    else
    {
        m_rect = rcPaint;
    }
    VERIFY(Attach (::CreateCompatibleDC (m_hDestDC)));
    m_bitmap.Attach (::CreateCompatibleBitmap (m_hDestDC, m_rect.right, m_rect.bottom));
    m_hOldBitmap = ::SelectObject (m_hDC, m_bitmap);

    if ( m_rect.top > 0 )
    {
        ExcludeClipRect (0, 0, m_rect.right, m_rect.top);
    }
    if ( m_rect.left > 0 )
    {
        ExcludeClipRect (0, m_rect.top, m_rect.left, m_rect.bottom);
    }
}

///////////////////////////////////////////////////////////////////////////////
CBufferDC::~CBufferDC ()
{
    VERIFY(::BitBlt (m_hDestDC, m_rect.left, m_rect.top, m_rect.Width(), m_rect.Height(), m_hDC, m_rect.left, m_rect.top, SRCCOPY));
    ::SelectObject (m_hDC, m_hOldBitmap);
}


///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
CPenDC::CPenDC (HDC hDC, COLORREF crColor) : m_hDC (hDC)
{
    VERIFY(m_pen.CreatePen (PS_SOLID, 1, crColor));
    m_hOldPen = (HPEN)::SelectObject (m_hDC, m_pen);
}

///////////////////////////////////////////////////////////////////////////////
CPenDC::~CPenDC ()
{
    ::SelectObject (m_hDC, m_hOldPen);
}

///////////////////////////////////////////////////////////////////////////////
void CPenDC::Color (COLORREF crColor)
{
    ::SelectObject (m_hDC, m_hOldPen);
    VERIFY(m_pen.DeleteObject());
    VERIFY(m_pen.CreatePen (PS_SOLID, 1, crColor));
    m_hOldPen = (HPEN)::SelectObject (m_hDC, m_pen);
}

///////////////////////////////////////////////////////////////////////////////
COLORREF CPenDC::Color () const
{
    LOGPEN logPen;

    ((CPenDC*)this)->m_pen.GetLogPen (&logPen);

    return logPen.lopnColor;
}


///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
CBrushDC::CBrushDC (HDC hDC, COLORREF crColor) : m_hDC (hDC)
{
    if ( crColor == CLR_NONE ) VERIFY(m_brush.CreateStockObject (NULL_BRUSH));
    else                       VERIFY(m_brush.CreateSolidBrush (crColor));
    m_hOldBrush = (HBRUSH)::SelectObject (m_hDC, m_brush);
}

///////////////////////////////////////////////////////////////////////////////
CBrushDC::~CBrushDC ()
{
    ::SelectObject (m_hDC, m_hOldBrush);
}

///////////////////////////////////////////////////////////////////////////////
void CBrushDC::Color (COLORREF crColor)
{
    ::SelectObject (m_hDC, m_hOldBrush);
    VERIFY(m_brush.DeleteObject());
    if ( crColor == CLR_NONE ) VERIFY(m_brush.CreateStockObject (NULL_BRUSH));
    else                       VERIFY(m_brush.CreateSolidBrush (crColor));
    m_hOldBrush = (HBRUSH)::SelectObject (m_hDC, m_brush);
}

///////////////////////////////////////////////////////////////////////////////
COLORREF CBrushDC::Color () const
{
    LOGBRUSH logBrush;

    ((CBrushDC*)this)->m_brush.GetLogBrush (&logBrush);

    return logBrush.lbColor;
}


/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
CBoldDC::CBoldDC (HDC hDC, bool bBold) : m_hDC (hDC), m_hDefFont (NULL)
{
    LOGFONT lf;

    CFont::FromHandle((HFONT)::GetCurrentObject(m_hDC, OBJ_FONT))->GetLogFont (&lf);

    if ( ( bBold && lf.lfWeight != FW_BOLD) ||
         (!bBold && lf.lfWeight == FW_BOLD) )
    {
        lf.lfWeight = bBold ? FW_BOLD : FW_NORMAL;

        m_fontBold.CreateFontIndirect (&lf);
        m_hDefFont = (HFONT)::SelectObject (m_hDC, m_fontBold);
    }
}

/////////////////////////////////////////////////////////////////////////////
CBoldDC::~CBoldDC ()
{
    if ( m_hDefFont != NULL )
    {
        ::SelectObject (m_hDC, m_hDefFont);
    }
}


/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
#define DB_GETTYPE(Style)       ((Style)&0x00FF)
#define DB_ISENABLED(Style)     (!((Style)&DB_DISABLED))
#define DB_ISBORDER(Style)      (((Style)&DB_BORDER)==DB_BORDER)
#define DB_ISWINDOWDC(Style)    (((Style)&DB_WINDOWDC)==DB_WINDOWDC)
#define DB_ISFLAT(Style)        (((Style)&DB_FLAT)==DB_FLAT)
#define DB_ISPRESSED(Style)     (((Style)&(DB_PRESSED|DB_PRESSED2))!=0)
#define DB_ISPRESSED1(Style)    (((Style)&DB_PRESSED)==DB_PRESSED)
#define DB_ISPRESSED2(Style)    (((Style)&DB_PRESSED2)==DB_PRESSED2)
#define DB_ISOVER(Style)        (((Style)&DB_OVER)==DB_OVER)
#define DB_ISTRANSPARENT(Style) (((Style)&DB_TRANSPARENT)==DB_TRANSPARENT)

/////////////////////////////////////////////////////////////////////////////
static void _DrawTriangle (CDC* pDC, int x, int y, int nSize, bool bDown)
{
    for ( int i = 0; i < nSize; i++ )
    {
        pDC->MoveTo (x-i, bDown ? y-i : y+i);
        pDC->LineTo (x+i+1, bDown ? y-i : y+i);
    }
}

/////////////////////////////////////////////////////////////////////////////
void CDrawButton::Draw (CDC* pDC, DWORD wStyle) const
{
    if ( wStyle == DB_DEFAULT )
    {
        wStyle = m_wStyle;
    }
    ASSERT (pDC != NULL);
    CRect rc (m_Rect);
    CPenDC pen (pDC->m_hDC, ::GetSysColor (COLOR_3DFACE));
    CBrushDC brush (pDC->m_hDC, ::GetSysColor (COLOR_3DFACE));

    if ( DB_ISBORDER(m_wStyle) && !DB_ISFLAT(wStyle) )
    {
        pDC->MoveTo (rc.right-1, rc.top);
        pDC->LineTo (rc.left, rc.top);
        pDC->LineTo (rc.left, rc.bottom);
        pDC->SetPixel (rc.right-1, rc.top, ::GetSysColor (COLOR_3DDKSHADOW));
        rc.left++;
        rc.top++;
    }
    COLORREF crBorder = 0, crPressed = 0, crOver = 0, crText = 0;

    if ( DB_ISFLAT(wStyle) )
    {
        crBorder = ::GetSysColor (COLOR_HIGHLIGHT);
        crPressed = HLS_TRANSFORM (crBorder, +50, -50);
        crOver = HLS_TRANSFORM (crBorder, +70, -57);
    }
    if ( DB_GETTYPE(wStyle) == DB_UPDOWN )
    {
        if ( !DB_ISPRESSED2(wStyle) )
        {
            if ( DB_ISFLAT(wStyle) )
            {
                CRect rcBtn (rc.left, rc.top, rc.right, (rc.top+rc.bottom)/2+1);

                if ( DB_ISENABLED(wStyle) && DB_ISOVER(wStyle) )
                {
                    pen.Color (crBorder);
                    brush.Color (DB_ISPRESSED(wStyle) ? crPressed : crOver);
                    pDC->Rectangle (rcBtn);
                }
                else if ( !DB_ISTRANSPARENT(wStyle) )
                {
                    pen.Color (::GetSysColor (DB_ISBORDER(m_wStyle) ? COLOR_3DSHADOW : COLOR_WINDOW));
                    pDC->Rectangle (rcBtn);
                }
            }
            else
            {
                CRect rcBtn (rc.left, rc.top, rc.right, (rc.top+rc.bottom)/2);

                pDC->DrawFrameControl (rcBtn, DFC_BUTTON, DFCS_BUTTONPUSH|(DB_ISPRESSED1(wStyle) ? DFCS_PUSHED : 0));
            }
        }
        if ( !DB_ISPRESSED(wStyle) && !DB_ISFLAT(wStyle) )
        {
            pDC->MoveTo (rc.left, (rc.top+rc.bottom)/2);
            pDC->LineTo (rc.right, (rc.top+rc.bottom)/2);