src/gtk/colour.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/colour.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/colour.h"
  14
  15 #include "wx/gtk/private.h"
  16
  17 #include <gdk/gdk.h>
  18
  19 //-----------------------------------------------------------------------------
  20 // wxColour
  21 //-----------------------------------------------------------------------------
  22
  23 class wxColourRefData : public wxGDIRefData
  24 {
  25 public:
  26     wxColourRefData(guint16 red, guint16 green, guint16 blue, guint16 alpha)
  27     {
  28         m_color.red =
  29         m_red = red;
  30         m_color.green =
  31         m_green = green;
  32         m_color.blue =
  33         m_blue = blue;
  34         m_alpha = alpha;
  35         m_color.pixel = 0;
  36         m_colormap = NULL;
  37     }
  38
  39     virtual ~wxColourRefData()
  40     {
  41         FreeColour();
  42     }
  43
  44     void FreeColour();
  45     void AllocColour( GdkColormap* cmap );
  46
  47     GdkColor     m_color;
  48     GdkColormap *m_colormap;
  49     // gdk_colormap_alloc_color may change the RGB values in m_color, so we need separate copies
  50     guint16 m_red;
  51     guint16 m_green;
  52     guint16 m_blue;
  53     guint16 m_alpha;
  54
  55     DECLARE_NO_COPY_CLASS(wxColourRefData)
  56 };
  57
  58 void wxColourRefData::FreeColour()
  59 {
  60     if (m_colormap)
  61     {
  62         gdk_colormap_free_colors(m_colormap, &m_color, 1);
  63         m_colormap = NULL;
  64         m_color.pixel = 0;
  65     }
  66 }
  67
  68 void wxColourRefData::AllocColour( GdkColormap *cmap )
  69 {
  70     if (m_colormap != cmap)
  71     {
  72         FreeColour();
  73
  74         m_color.red = m_red;
  75         m_color.green = m_green;
  76         m_color.blue = m_blue;
  77         if (gdk_colormap_alloc_color(cmap, &m_color, FALSE, TRUE))
  78         {
  79             m_colormap = cmap;
  80         }
  81     }
  82 }
  83
  84 //-----------------------------------------------------------------------------
  85
  86 #define M_COLDATA wx_static_cast(wxColourRefData*, m_refData)
  87
  88 // GDK's values are in 0..65535 range, ours are in 0..255
  89 #define SHIFT  8
  90
  91 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
  92
  93 wxColour::wxColour(const GdkColor& gdkColor)
  94 {
  95     m_refData = new wxColourRefData(gdkColor.red, gdkColor.green, gdkColor.blue, 0xFFFF /*opaque alpha in 16 bit*/);
  96 }
  97
  98 wxColour::~wxColour()
  99 {
 100 }
 101
 102 bool wxColour::operator == ( const wxColour& col ) const
 103 {
 104     if (m_refData == col.m_refData)
 105         return true;
 106
 107     if (!m_refData || !col.m_refData)
 108         return false;
 109
 110     wxColourRefData* refData = M_COLDATA;
 111     wxColourRefData* that_refData = wx_static_cast(wxColourRefData*, col.m_refData);
 112     return refData->m_red == that_refData->m_red &&
 113            refData->m_green == that_refData->m_green &&
 114            refData->m_blue == that_refData->m_blue &&
 115            refData->m_alpha == that_refData->m_alpha;
 116 }
 117
 118 void wxColour::InitRGBA(unsigned char red, unsigned char green, unsigned char blue,
 119                         unsigned char alpha)
 120 {
 121     UnRef();
 122
 123     m_refData = new wxColourRefData(
 124         (guint16(red) << SHIFT) + red,
 125         (guint16(green) << SHIFT) + green,
 126         (guint16(blue) << SHIFT) + blue,
 127         (guint16(alpha) << SHIFT) + alpha);
 128 }
 129
 130 unsigned char wxColour::Red() const
 131 {
 132     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 133
 134     return wxByte(M_COLDATA->m_red >> SHIFT);
 135 }
 136
 137 unsigned char wxColour::Green() const
 138 {
 139     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 140
 141     return wxByte(M_COLDATA->m_green >> SHIFT);
 142 }
 143
 144 unsigned char wxColour::Blue() const
 145 {
 146     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 147
 148     return wxByte(M_COLDATA->m_blue >> SHIFT);
 149 }
 150
 151 unsigned char wxColour::Alpha() const
 152 {
 153     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 154
 155     return wxByte(M_COLDATA->m_alpha >> SHIFT);
 156 }
 157
 158 void wxColour::CalcPixel( GdkColormap *cmap )
 159 {
 160     if (!Ok()) return;
 161
 162     M_COLDATA->AllocColour( cmap );
 163 }
 164
 165 int wxColour::GetPixel() const
 166 {
 167     wxCHECK_MSG( Ok(), 0, wxT("invalid colour") );
 168
 169     return M_COLDATA->m_color.pixel;
 170 }
 171
 172 const GdkColor *wxColour::GetColor() const
 173 {
 174     wxCHECK_MSG( Ok(), NULL, wxT("invalid colour") );
 175
 176     return &M_COLDATA->m_color;
 177 }
 178
 179 bool wxColour::FromString(const wxString& str)
 180 {
 181     GdkColor colGDK;
 182     if ( gdk_color_parse( wxGTK_CONV_SYS( str ), &colGDK ) )
 183     {
 184         *this = wxColour(colGDK);
 185         return true;
 186     }
 187
 188     return wxColourBase::FromString(str);
 189 }