src/gtk1/colour.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        colour.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // Id:
   7 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "colour.h"
  14 #endif
  15
  16 #include "wx/gdicmn.h"
  17
  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( char red, char green, 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, &M_COLDATA->m_color ))
  93     {
  94       wxFAIL_MSG( "wxColour: couldn't find colour" );
  95       delete m_refData;
  96       m_refData = (wxObjectRefData *) NULL;
  97     }
  98   }
  99 }
 100
 101 wxColour::wxColour( const wxColour& col )
 102 {
 103   Ref( col );
 104 }
 105
 106 wxColour::wxColour( const wxColour* col )
 107 {
 108   if (col) Ref( *col );
 109 }
 110
 111 wxColour::~wxColour()
 112 {
 113 }
 114
 115 wxColour& wxColour::operator = ( const wxColour& col )
 116 {
 117   if (*this == col) return (*this);
 118   Ref( col );
 119   return *this;
 120 }
 121
 122 bool wxColour::operator == ( const wxColour& col )
 123 {
 124   return m_refData == col.m_refData;
 125 }
 126
 127 bool wxColour::operator != ( const wxColour& col)
 128 {
 129   return m_refData != col.m_refData;
 130 }
 131
 132 void wxColour::Set( const unsigned char red, const unsigned char green, const unsigned char blue )
 133 {
 134   UnRef();
 135   m_refData = new wxColourRefData();
 136   M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 137   M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 138   M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 139   M_COLDATA->m_color.pixel = 0;
 140 }
 141
 142 unsigned char wxColour::Red() const
 143 {
 144   if (!Ok())
 145   {
 146      wxFAIL_MSG( "invalid colour" );
 147      return 0;
 148   }
 149
 150   return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 151 }
 152
 153 unsigned char wxColour::Green() const
 154 {
 155   if (!Ok())
 156   {
 157      wxFAIL_MSG( "invalid colour" );
 158      return 0;
 159   }
 160
 161   return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 162 }
 163
 164 unsigned char wxColour::Blue() const
 165 {
 166   if (!Ok())
 167   {
 168      wxFAIL_MSG( "invalid colour" );
 169      return 0;
 170   }
 171
 172   return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 173 }
 174
 175 bool wxColour::Ok() const
 176 {
 177   return (m_refData != NULL);
 178 }
 179
 180 void wxColour::CalcPixel( GdkColormap *cmap )
 181 {
 182   if (!Ok()) return;
 183
 184   if ((M_COLDATA->m_hasPixel) && (M_COLDATA->m_colormap == cmap)) return;
 185   M_COLDATA->FreeColour();
 186
 187   GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 188   if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 189       (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 190   {
 191     GdkColor *colors = cmap->colors;
 192     int max = 3 * (65536);
 193     int index = -1;
 194
 195     for (int i = 0; i < cmap->size; i++)
 196     {
 197       int rdiff = (M_COLDATA->m_color.red - colors[i].red);
 198       int gdiff = (M_COLDATA->m_color.green - colors[i].green);
 199       int bdiff = (M_COLDATA->m_color.blue - colors[i].blue);
 200       int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 201       if (sum < max) { index = i; max = sum; }
 202     }
 203
 204     M_COLDATA->m_hasPixel = TRUE;
 205     M_COLDATA->m_color.pixel = index;
 206   }
 207   else
 208   {
 209     M_COLDATA->m_hasPixel = gdk_color_alloc( cmap, &M_COLDATA->m_color );
 210   }
 211
 212   M_COLDATA->m_colormap = cmap;
 213 }
 214
 215 int wxColour::GetPixel() const
 216 {
 217   if (!Ok()) return 0;
 218
 219   return M_COLDATA->m_color.pixel;
 220 }
 221
 222 GdkColor *wxColour::GetColor() const
 223 {
 224   if (!Ok()) return (GdkColor *) NULL;
 225
 226   return &M_COLDATA->m_color;
 227 }
 228
 229