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