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( wxT("wxColour: couldn't find colour") );
  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 ) const
 119 {
 120     if (m_refData == col.m_refData) return TRUE;
 121
 122     if (!m_refData) return FALSE;
 123     if (!col.m_refData) return FALSE;
 124
 125     GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
 126     GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 127     if (own->red != other->red) return FALSE;
 128     if (own->blue != other->blue) return FALSE;
 129     if (own->green != other->green) return FALSE;
 130
 131     return TRUE;
 132 }
 133
 134 bool wxColour::operator != ( const wxColour& col) const
 135 {
 136     return m_refData != col.m_refData;
 137 }
 138
 139 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 140 {
 141     UnRef();
 142     m_refData = new wxColourRefData();
 143     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 144     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 145     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 146     M_COLDATA->m_color.pixel = 0;
 147 }
 148
 149 unsigned char wxColour::Red() const
 150 {
 151     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 152
 153     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 154 }
 155
 156 unsigned char wxColour::Green() const
 157 {
 158     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 159
 160     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 161 }
 162
 163 unsigned char wxColour::Blue() const
 164 {
 165     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 166
 167     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 168 }
 169
 170 bool wxColour::Ok() const
 171 {
 172     return (m_refData != NULL);
 173 }
 174
 175 void wxColour::CalcPixel( GdkColormap *cmap )
 176 {
 177     if (!Ok()) return;
 178
 179     if ((M_COLDATA->m_hasPixel) && (M_COLDATA->m_colormap == cmap)) return;
 180
 181     M_COLDATA->FreeColour();
 182
 183     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 184     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 185         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 186     {
 187         GdkColor *colors = cmap->colors;
 188         int max = 3 * (65536);
 189         int index = -1;
 190
 191         for (int i = 0; i < cmap->size; i++)
 192         {
 193             int rdiff = (M_COLDATA->m_color.red - colors[i].red);
 194             int gdiff = (M_COLDATA->m_color.green - colors[i].green);
 195             int bdiff = (M_COLDATA->m_color.blue - colors[i].blue);
 196             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 197             if (sum < max) { index = i; max = sum; }
 198         }
 199
 200         M_COLDATA->m_hasPixel = TRUE;
 201         M_COLDATA->m_color.pixel = index;
 202     }
 203     else
 204     {
 205         M_COLDATA->m_hasPixel = gdk_color_alloc( cmap, &M_COLDATA->m_color );
 206     }
 207
 208     M_COLDATA->m_colormap = cmap;
 209 }
 210
 211 int wxColour::GetPixel() const
 212 {
 213     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 214
 215     return M_COLDATA->m_color.pixel;
 216 }
 217
 218 GdkColor *wxColour::GetColor() const
 219 {
 220     wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
 221
 222     return &M_COLDATA->m_color;
 223 }
 224
 225