src/gtk/colour.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        colour.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "colour.h"
  13 #endif
  14
  15 #include "wx/gdicmn.h"
  16
  17 #include "gdk/gdk.h"
  18 #include "gdk/gdkprivate.h"
  19
  20 //-----------------------------------------------------------------------------
  21 // wxColour
  22 //-----------------------------------------------------------------------------
  23
  24 class wxColourRefData: public wxObjectRefData
  25 {
  26   public:
  27
  28     wxColourRefData();
  29     ~wxColourRefData();
  30     void FreeColour();
  31
  32     GdkColor     m_color;
  33     GdkColormap *m_colormap;
  34     bool         m_hasPixel;
  35
  36     friend wxColour;
  37 };
  38
  39 wxColourRefData::wxColourRefData()
  40 {
  41     m_color.red = 0;
  42     m_color.green = 0;
  43     m_color.blue = 0;
  44     m_color.pixel = 0;
  45     m_colormap = (GdkColormap *) NULL;
  46     m_hasPixel = FALSE;
  47 }
  48
  49 wxColourRefData::~wxColourRefData()
  50 {
  51     FreeColour();
  52 }
  53
  54 void wxColourRefData::FreeColour()
  55 {
  56 //  if (m_hasPixel) gdk_colors_free( m_colormap, &m_color, 1, 0 );
  57 }
  58
  59 //-----------------------------------------------------------------------------
  60
  61 #define M_COLDATA ((wxColourRefData *)m_refData)
  62
  63 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
  66
  67 wxColour::wxColour()
  68 {
  69 }
  70
  71 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
  72 {
  73     m_refData = new wxColourRefData();
  74     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
  75     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
  76     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
  77     M_COLDATA->m_color.pixel = 0;
  78 }
  79
  80 void wxColour::InitFromName( const wxString &colourName )
  81 {
  82     wxNode *node = (wxNode *) NULL;
  83     if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
  84     {
  85         wxColour *col = (wxColour*)node->Data();
  86         UnRef();
  87         if (col) Ref( *col );
  88     }
  89     else
  90     {
  91         m_refData = new wxColourRefData();
  92         if (!gdk_color_parse( colourName.mb_str(), &M_COLDATA->m_color ))
  93         {
  94             wxFAIL_MSG( _T("wxColour: couldn't find colour") );
  95             wxPrintf( _T("Colourname %s.\n"), WXSTRINGCAST colourName );
  96
  97             delete m_refData;
  98             m_refData = (wxObjectRefData *) NULL;
  99         }
 100     }
 101 }
 102
 103 wxColour::wxColour( const wxColour& col )
 104 {
 105     Ref( col );
 106 }
 107
 108 wxColour::~wxColour()
 109 {
 110 }
 111
 112 wxColour& wxColour::operator = ( const wxColour& col )
 113 {
 114     if (*this == col) return (*this);
 115     Ref( col );
 116     return *this;
 117 }
 118
 119 bool wxColour::operator == ( const wxColour& col ) const
 120 {
 121     return m_refData == col.m_refData;
 122 }
 123
 124 bool wxColour::operator != ( const wxColour& col) const
 125 {
 126     return m_refData != col.m_refData;
 127 }
 128
 129 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 130 {
 131     UnRef();
 132     m_refData = new wxColourRefData();
 133     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 134     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 135     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 136     M_COLDATA->m_color.pixel = 0;
 137 }
 138
 139 unsigned char wxColour::Red() const
 140 {
 141     wxCHECK_MSG( Ok(), 0, _T("invalid colour") );
 142
 143     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 144 }
 145
 146 unsigned char wxColour::Green() const
 147 {
 148     wxCHECK_MSG( Ok(), 0, _T("invalid colour") );
 149
 150     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 151 }
 152
 153 unsigned char wxColour::Blue() const
 154 {
 155     wxCHECK_MSG( Ok(), 0, _T("invalid colour") );
 156
 157     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 158 }
 159
 160 bool wxColour::Ok() const
 161 {
 162     return (m_refData != NULL);
 163 }
 164
 165 void wxColour::CalcPixel( GdkColormap *cmap )
 166 {
 167     if (!Ok()) return;
 168
 169     if ((M_COLDATA->m_hasPixel) && (M_COLDATA->m_colormap == cmap)) return;
 170
 171     M_COLDATA->FreeColour();
 172
 173     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 174     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 175         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 176     {
 177         GdkColor *colors = cmap->colors;
 178         int max = 3 * (65536);
 179         int index = -1;
 180
 181         for (int i = 0; i < cmap->size; i++)
 182         {
 183             int rdiff = (M_COLDATA->m_color.red - colors[i].red);
 184             int gdiff = (M_COLDATA->m_color.green - colors[i].green);
 185             int bdiff = (M_COLDATA->m_color.blue - colors[i].blue);
 186             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 187             if (sum < max) { index = i; max = sum; }
 188         }
 189
 190         M_COLDATA->m_hasPixel = TRUE;
 191         M_COLDATA->m_color.pixel = index;
 192     }
 193     else
 194     {
 195         M_COLDATA->m_hasPixel = gdk_color_alloc( cmap, &M_COLDATA->m_color );
 196     }
 197
 198     M_COLDATA->m_colormap = cmap;
 199 }
 200
 201 int wxColour::GetPixel() const
 202 {
 203     wxCHECK_MSG( Ok(), 0, _T("invalid colour") );
 204
 205     return M_COLDATA->m_color.pixel;
 206 }
 207
 208 GdkColor *wxColour::GetColor() const
 209 {
 210     wxCHECK_MSG( Ok(), (GdkColor *) NULL, _T("invalid colour") );
 211
 212     return &M_COLDATA->m_color;
 213 }
 214
 215