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/gdkx.h>
  19 #include <gdk/gdkprivate.h>
  20
  21 //-----------------------------------------------------------------------------
  22 // wxColour
  23 //-----------------------------------------------------------------------------
  24
  25 class wxColourRefData: public wxObjectRefData
  26 {
  27   public:
  28
  29     wxColourRefData();
  30     ~wxColourRefData();
  31     void FreeColour();
  32
  33     GdkColor     m_color;
  34     GdkColormap *m_colormap;
  35     bool         m_hasPixel;
  36
  37     friend class wxColour;
  38 };
  39
  40 wxColourRefData::wxColourRefData()
  41 {
  42     m_color.red = 0;
  43     m_color.green = 0;
  44     m_color.blue = 0;
  45     m_color.pixel = 0;
  46     m_colormap = (GdkColormap *) NULL;
  47     m_hasPixel = FALSE;
  48 }
  49
  50 wxColourRefData::~wxColourRefData()
  51 {
  52     FreeColour();
  53 }
  54
  55 void wxColourRefData::FreeColour()
  56 {
  57 //  if (m_hasPixel) gdk_colors_free( m_colormap, &m_color, 1, 0 );
  58 }
  59
  60 //-----------------------------------------------------------------------------
  61
  62 #define M_COLDATA ((wxColourRefData *)m_refData)
  63
  64 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  65
  66 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
  67
  68 wxColour::wxColour()
  69 {
  70 }
  71
  72 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
  73 {
  74     m_refData = new wxColourRefData();
  75     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
  76     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
  77     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
  78     M_COLDATA->m_color.pixel = 0;
  79 }
  80
  81 void wxColour::InitFromName( const wxString &colourName )
  82 {
  83     wxNode *node = (wxNode *) NULL;
  84     if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
  85     {
  86         wxColour *col = (wxColour*)node->Data();
  87         UnRef();
  88         if (col) Ref( *col );
  89     }
  90     else
  91     {
  92         m_refData = new wxColourRefData();
  93         if (!gdk_color_parse( colourName.mb_str(), &M_COLDATA->m_color ))
  94         {
  95             wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
  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     if (m_refData == col.m_refData) return TRUE;
 122
 123     if (!m_refData) return FALSE;
 124     if (!col.m_refData) return FALSE;
 125
 126     GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
 127     GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 128     if (own->red != other->red) return FALSE;
 129     if (own->blue != other->blue) return FALSE;
 130     if (own->green != other->green) return FALSE;
 131
 132     return TRUE;
 133 }
 134
 135 bool wxColour::operator != ( const wxColour& col) const
 136 {
 137     return !(*this == col);
 138 }
 139
 140 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 141 {
 142     UnRef();
 143     m_refData = new wxColourRefData();
 144     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 145     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 146     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 147     M_COLDATA->m_color.pixel = 0;
 148 }
 149
 150 unsigned char wxColour::Red() const
 151 {
 152     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 153
 154     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 155 }
 156
 157 unsigned char wxColour::Green() const
 158 {
 159     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 160
 161     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 162 }
 163
 164 unsigned char wxColour::Blue() const
 165 {
 166     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 167
 168     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 169 }
 170
 171 bool wxColour::Ok() const
 172 {
 173     return (m_refData != NULL);
 174 }
 175
 176 void wxColour::CalcPixel( GdkColormap *cmap )
 177 {
 178     if (!Ok()) return;
 179
 180     if ((M_COLDATA->m_hasPixel) && (M_COLDATA->m_colormap == cmap)) return;
 181
 182     M_COLDATA->FreeColour();
 183
 184 #ifdef __WXGTK20__
 185     if ((cmap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 186         (cmap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 187 #else
 188     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 189     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 190         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 191 #endif
 192     {
 193         GdkColor *colors = cmap->colors;
 194         int max = 3 * (65536);
 195         int index = -1;
 196
 197         for (int i = 0; i < cmap->size; i++)
 198         {
 199             int rdiff = (M_COLDATA->m_color.red - colors[i].red);
 200             int gdiff = (M_COLDATA->m_color.green - colors[i].green);
 201             int bdiff = (M_COLDATA->m_color.blue - colors[i].blue);
 202             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 203             if (sum < max) { index = i; max = sum; }
 204         }
 205
 206         M_COLDATA->m_hasPixel = TRUE;
 207         M_COLDATA->m_color.pixel = index;
 208     }
 209     else
 210     {
 211         M_COLDATA->m_hasPixel = gdk_color_alloc( cmap, &M_COLDATA->m_color );
 212     }
 213
 214     M_COLDATA->m_colormap = cmap;
 215 }
 216
 217 int wxColour::GetPixel() const
 218 {
 219     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 220
 221     return M_COLDATA->m_color.pixel;
 222 }
 223
 224 GdkColor *wxColour::GetColor() const
 225 {
 226     wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
 227
 228     return &M_COLDATA->m_color;
 229 }
 230
 231