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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/gdkprivate.h"
18
19 //-----------------------------------------------------------------------------
20 // wxColour
21 //-----------------------------------------------------------------------------
22
23 class wxColourRefData: public wxObjectRefData
24 {
25 public:
26
27 wxColourRefData();
28 ~wxColourRefData();
29 void FreeColour();
30
31 GdkColor m_color;
32 GdkColormap *m_colormap;
33 bool m_hasPixel;
34
35 friend wxColour;
36 };
37
38 wxColourRefData::wxColourRefData()
39 {
40 m_color.red = 0;
41 m_color.green = 0;
42 m_color.blue = 0;
43 m_color.pixel = 0;
44 m_colormap = (GdkColormap *) NULL;
45 m_hasPixel = FALSE;
46 }
47
48 wxColourRefData::~wxColourRefData()
49 {
50 FreeColour();
51 }
52
53 void wxColourRefData::FreeColour()
54 {
55 // if (m_hasPixel) gdk_colors_free( m_colormap, &m_color, 1, 0 );
56 }
57
58 //-----------------------------------------------------------------------------
59
60 #define M_COLDATA ((wxColourRefData *)m_refData)
61
62 #define SHIFT (8*(sizeof(short int)-sizeof(char)))
63
64 IMPLEMENT_DYNAMIC_CLASS(wxColour,wxGDIObject)
65
66 wxColour::wxColour()
67 {
68 }
69
70 wxColour::wxColour( unsigned char red, unsigned char green, unsigned char blue )
71 {
72 m_refData = new wxColourRefData();
73 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
74 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
75 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
76 M_COLDATA->m_color.pixel = 0;
77 }
78
79 void wxColour::InitFromName( const wxString &colourName )
80 {
81 wxNode *node = (wxNode *) NULL;
82 if ( (wxTheColourDatabase) && (node = wxTheColourDatabase->Find(colourName)) )
83 {
84 wxColour *col = (wxColour*)node->Data();
85 UnRef();
86 if (col) Ref( *col );
87 }
88 else
89 {
90 m_refData = new wxColourRefData();
91 if (!gdk_color_parse( colourName, &M_COLDATA->m_color ))
92 {
93 wxFAIL_MSG( "wxColour: couldn't find colour" );
94 printf( "Colourname %s.\n", WXSTRINGCAST colourName );
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 )
119 {
120 return m_refData == col.m_refData;
121 }
122
123 bool wxColour::operator != ( const wxColour& col)
124 {
125 return m_refData != col.m_refData;
126 }
127
128 void wxColour::Set( unsigned char red, unsigned char green, unsigned char blue )
129 {
130 UnRef();
131 m_refData = new wxColourRefData();
132 M_COLDATA->m_color.red = ((unsigned short)red) << SHIFT;
133 M_COLDATA->m_color.green = ((unsigned short)green) << SHIFT;
134 M_COLDATA->m_color.blue = ((unsigned short)blue) << SHIFT;
135 M_COLDATA->m_color.pixel = 0;
136 }
137
138 unsigned char wxColour::Red() const
139 {
140 wxCHECK_MSG( Ok(), 0, "invalid colour" );
141
142 return (unsigned char)(M_COLDATA->m_color.red >> SHIFT);
143 }
144
145 unsigned char wxColour::Green() const
146 {
147 wxCHECK_MSG( Ok(), 0, "invalid colour" );
148
149 return (unsigned char)(M_COLDATA->m_color.green >> SHIFT);
150 }
151
152 unsigned char wxColour::Blue() const
153 {
154 wxCHECK_MSG( Ok(), 0, "invalid colour" );
155
156 return (unsigned char)(M_COLDATA->m_color.blue >> SHIFT);
157 }
158
159 bool wxColour::Ok() const
160 {
161 return (m_refData != NULL);
162 }
163
164 void wxColour::CalcPixel( GdkColormap *cmap )
165 {
166 if (!Ok()) return;
167
168 if ((M_COLDATA->m_hasPixel) && (M_COLDATA->m_colormap == cmap)) return;
169 M_COLDATA->FreeColour();
170
171 GdkColormapPrivate *private_colormap = (GdkColormapPrivate*) cmap;
172 if ((private_colormap->visual->type == GDK_VISUAL_GRAYSCALE) ||
173 (private_colormap->visual->type == GDK_VISUAL_PSEUDO_COLOR))
174 {
175 GdkColor *colors = cmap->colors;
176 int max = 3 * (65536);
177 int index = -1;
178
179 for (int i = 0; i < cmap->size; i++)
180 {
181 int rdiff = (M_COLDATA->m_color.red - colors[i].red);
182 int gdiff = (M_COLDATA->m_color.green - colors[i].green);
183 int bdiff = (M_COLDATA->m_color.blue - colors[i].blue);
184 int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
185 if (sum < max) { index = i; max = sum; }
186 }
187
188 M_COLDATA->m_hasPixel = TRUE;
189 M_COLDATA->m_color.pixel = index;
190 }
191 else
192 {
193 M_COLDATA->m_hasPixel = gdk_color_alloc( cmap, &M_COLDATA->m_color );
194 }
195
196 M_COLDATA->m_colormap = cmap;
197 }
198
199 int wxColour::GetPixel() const
200 {
201 wxCHECK_MSG( Ok(), 0, "invalid colour" );
202
203 return M_COLDATA->m_color.pixel;
204 }
205
206 GdkColor *wxColour::GetColor() const
207 {
208 wxCHECK_MSG( Ok(), (GdkColor *) NULL, "invalid colour" );
209
210 return &M_COLDATA->m_color;
211 }
212
213