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     wxColourRefData();
  29     ~wxColourRefData();
  30
  31     void FreeColour();
  32
  33 public:
  34     GdkColor     m_color;
  35     GdkColormap *m_colormap;
  36     bool         m_hasPixel;
  37
  38     friend class 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_colormap)
  59     {
  60 #ifdef __WXGTK20__
  61         if ((m_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
  62             (m_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
  63 #else
  64         GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) m_colormap;
  65         if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
  66             (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
  67 #endif
  68         {
  69             // What happens if the colour has not been allocated
  70             // anew but has been found? RR.
  71             gdk_colormap_free_colors( m_colormap, &m_color, 1 );
  72         }
  73     }
  74 }
  75
  76 //-----------------------------------------------------------------------------
  77
  78 #define M_COLDATA ((wxColourRefData *)m_refData)
  79
  80 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
  81
  82 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
  83
  84 wxColour::wxColour()
  85 {
  86 }
  87
  88 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
  89 {
  90     m_refData = new wxColourRefData();
  91     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
  92     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
  93     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
  94     M_COLDATA->m_color.pixel = 0;
  95 }
  96
  97 void wxColour::InitFromName( const wxString &colourName )
  98 {
  99     wxNode *node = (wxNode *) NULL;
 100     if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
 101     {
 102         wxColour *col = (wxColour*)node->Data();
 103         UnRef();
 104         if (col) Ref( *col );
 105     }
 106     else
 107     {
 108         m_refData = new wxColourRefData();
 109         if (!gdk_color_parse( colourName.mb_str(), &M_COLDATA->m_color ))
 110         {
 111             // VZ: asserts are good in general but this one is triggered by
 112             //     calling wxColourDatabase::FindColour() with an
 113             //     unrecognized colour name and this can't be avoided from the
 114             //     user code, so don't give it here
 115             //
 116             //     a better solution would be to changed code in FindColour()
 117
 118             //wxFAIL_MSG( wxT("wxColour: couldn't find colour") );
 119
 120             delete m_refData;
 121             m_refData = (wxObjectRefData *) NULL;
 122         }
 123     }
 124 }
 125
 126 wxColour::wxColour( const wxColour& col )
 127 {
 128     Ref( col );
 129 }
 130
 131 wxColour::~wxColour()
 132 {
 133 }
 134
 135 wxColour& wxColour::operator = ( const wxColour& col )
 136 {
 137     if (*this == col) return (*this);
 138     Ref( col );
 139     return *this;
 140 }
 141
 142 bool wxColour::operator == ( const wxColour& col ) const
 143 {
 144     if (m_refData == col.m_refData) return TRUE;
 145
 146     if (!m_refData) return FALSE;
 147     if (!col.m_refData) return FALSE;
 148
 149     GdkColor *own = &(((wxColourRefData*)m_refData)->m_color);
 150     GdkColor *other = &(((wxColourRefData*)col.m_refData)->m_color);
 151     if (own->red != other->red) return FALSE;
 152     if (own->blue != other->blue) return FALSE;
 153     if (own->green != other->green) return FALSE;
 154
 155     return TRUE;
 156 }
 157
 158 bool wxColour::operator != ( const wxColour& col) const
 159 {
 160     return !(*this == col);
 161 }
 162
 163 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
 164 {
 165     UnRef();
 166     m_refData = new wxColourRefData();
 167     M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
 168     M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
 169     M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
 170     M_COLDATA->m_color.pixel = 0;
 171 }
 172
 173 unsigned char wxColour::Red() const
 174 {
 175     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 176
 177     return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
 178 }
 179
 180 unsigned char wxColour::Green() const
 181 {
 182     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 183
 184     return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
 185 }
 186
 187 unsigned char wxColour::Blue() const
 188 {
 189     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 190
 191     return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
 192 }
 193
 194 bool wxColour::Ok() const
 195 {
 196     return (m_refData != NULL);
 197 }
 198
 199 void wxColour::CalcPixel( GdkColormap *cmap )
 200 {
 201     if (!Ok()) return;
 202
 203     if ((M_COLDATA->m_hasPixel) && (M_COLDATA->m_colormap == cmap)) return;
 204
 205     M_COLDATA->FreeColour();
 206
 207 #ifdef __WXGTK20__
 208     if ((cmap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 209         (cmap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 210 #else
 211     GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
 212     if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
 213         (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
 214 #endif
 215     {
 216         M_COLDATA->m_hasPixel = gdk_colormap_alloc_color( cmap, &M_COLDATA->m_color, FALSE, TRUE );
 217     }
 218     else
 219     {
 220         M_COLDATA->m_hasPixel = gdk_color_alloc( cmap, &M_COLDATA->m_color );
 221     }
 222
 223     M_COLDATA->m_colormap = cmap;
 224 }
 225
 226 int wxColour::GetPixel() const
 227 {
 228     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 229
 230     return M_COLDATA->m_color.pixel;
 231 }
 232
 233 GdkColor *wxColour::GetColor() const
 234 {
 235     wxCHECK_MSG( Ok(), (GdkColor *) NULL, wxT("invalid colour") );
 236
 237     return &M_COLDATA->m_color;
 238 }
 239
 240