src/gtk/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 #ifdef wxUSE_GDK_IMLIB
  19 #include "../gdk_imlib/gdk_imlib.h"
  20 #endif
  21
  22 //-----------------------------------------------------------------------------
  23 // wxColour
  24 //-----------------------------------------------------------------------------
  25
  26 class wxColourRefData: public wxObjectRefData
  27 {
  28   public:
  29
  30     wxColourRefData();
  31     ~wxColourRefData();
  32     void FreeColour();
  33
  34     GdkColor     m_color;
  35     GdkColormap *m_colormap;
  36     bool         m_hasPixel;
  37
  38     friend wxColour;
  39 };
  40
  41 wxColourRefData::wxColourRefData()
  42 {
  43   m_color.red = 0;
  44   m_color.green = 0;
  45   m_color.blue = 0;
  46   m_color.pixel = 0;
  47   m_colormap = (GdkColormap *) NULL;
  48   m_hasPixel = FALSE;
  49 }
  50
  51 wxColourRefData::~wxColourRefData()
  52 {
  53   FreeColour();
  54 }
  55
  56 void wxColourRefData::FreeColour()
  57 {
  58 //  if (m_hasPixel) gdk_colors_free( m_colormap, &m_color, 1, 0 );
  59 }
  60
  61 //-----------------------------------------------------------------------------
  62
  63 #define M_COLDATA ((wxColourRefData *)m_refData)
  64
  65 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  66
  67 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
  68
  69 wxColour::wxColour()
  70 {
  71 }
  72
  73 wxColour::wxColour( char red, char green, char blue )
  74 {
  75   m_refData = new wxColourRefData();
  76   M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
  77   M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
  78   M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
  79   M_COLDATA->m_color.pixel = 0;
  80 }
  81
  82 void wxColour::InitFromName( const wxString &colourName )
  83 {
  84   wxNode *node = (wxNode *) NULL;
  85   if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
  86   {
  87     wxColour *col = (wxColour*)node->Data();
  88     UnRef();
  89     if (col) Ref( *col );
  90   }
  91   else
  92   {
  93     m_refData = new wxColourRefData();
  94     if (!gdk_color_parse( colourName, &M_COLDATA->m_color ))
  95     {
  96       wxFAIL_MSG( "wxColour: couldn't find colour" );
  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( const wxColour* col )
 109 {
 110   if (col) Ref( *col );
 111 }
 112
 113 wxColour::~wxColour()
 114 {
 115 }
 116
 117 wxColour& wxColour::operator = ( const wxColour& col )
 118 {
 119   if (*this == col) return (*this);
 120   Ref( col );
 121   return *this;
 122 }
 123
 124 bool wxColour::operator == ( const wxColour& col )
 125 {
 126   return m_refData == col.m_refData;
 127 }
 128
 129 bool wxColour::operator != ( const wxColour& col)
 130 {
 131   return m_refData != col.m_refData;
 132 }
 133
 134 void wxColour::Set( const unsigned char red, const unsigned char green, const unsigned char blue )
 135 {
 136   UnRef();
 137   m_refData = new wxColourRefData();
 138   M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 139   M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 140   M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 141   M_COLDATA->m_color.pixel = 0;
 142 }
 143
 144 unsigned char wxColour::Red() const
 145 {
 146   if (!Ok())
 147   {
 148      wxFAIL_MSG( "invalid colour" );
 149      return 0;
 150   }
 151
 152   return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 153 }
 154
 155 unsigned char wxColour::Green() const
 156 {
 157   if (!Ok())
 158   {
 159      wxFAIL_MSG( "invalid colour" );
 160      return 0;
 161   }
 162
 163   return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 164 }
 165
 166 unsigned char wxColour::Blue() const
 167 {
 168   if (!Ok())
 169   {
 170      wxFAIL_MSG( "invalid colour" );
 171      return 0;
 172   }
 173
 174   return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 175 }
 176
 177 bool wxColour::Ok() const
 178 {
 179   return (m_refData != NULL);
 180 }
 181
 182 void wxColour::CalcPixel( GdkColormap *cmap )
 183 {
 184   if (!Ok()) return;
 185
 186   if ((M_COLDATA->m_hasPixel) && (M_COLDATA->m_colormap == cmap)) return;
 187   M_COLDATA->FreeColour();
 188
 189 #ifdef wxUSE_GDK_IMLIB
 190
 191   int r = M_COLDATA->m_color.red >> SHIFT;
 192   int g = M_COLDATA->m_color.green >> SHIFT;
 193   int b = M_COLDATA->m_color.blue >> SHIFT;
 194   M_COLDATA->m_hasPixel = TRUE;
 195   M_COLDATA->m_color.pixel = gdk_imlib_best_color_match( &r, &g, &b );
 196
 197 #else
 198
 199   M_COLDATA->m_hasPixel = gdk_color_alloc( cmap, &M_COLDATA->m_color );
 200
 201 #endif
 202
 203   M_COLDATA->m_colormap = cmap;
 204 }
 205
 206 int wxColour::GetPixel() const
 207 {
 208   if (!Ok()) return 0;
 209
 210   return M_COLDATA->m_color.pixel;
 211 }
 212
 213 GdkColor *wxColour::GetColor() const
 214 {
 215   if (!Ok()) return (GdkColor *) NULL;
 216
 217   return &M_COLDATA->m_color;
 218 }
 219
 220