docs/latex/wx/colour.tex

   1 \section{\class{wxColour}}\label{wxcolour}
   2
   3 A colour is an object representing a combination of Red, Green, and Blue (RGB) intensity values,
   4 and is used to determine drawing colours. See the
   5 entry for \helpref{wxColourDatabase}{wxcolourdatabase} for how a pointer to a predefined,
   6 named colour may be returned instead of creating a new colour.
   7
   8 Valid RGB values are in the range 0 to 255.
   9
  10 You can retrieve the current system colour settings with \helpref{wxSystemSettings}{wxsystemsettings}.
  11
  12 \wxheading{Derived from}
  13
  14 \helpref{wxObject}{wxobject}
  15
  16 \wxheading{Include files}
  17
  18 <wx/colour.h>
  19
  20 \wxheading{Predefined objects}
  21
  22 Objects:
  23
  24 {\bf wxNullColour}
  25
  26 Pointers:
  27
  28 {\bf wxBLACK\\
  29 wxWHITE\\
  30 wxRED\\
  31 wxBLUE\\
  32 wxGREEN\\
  33 wxCYAN\\
  34 wxLIGHT\_GREY}
  35
  36 \wxheading{See also}
  37
  38 \helpref{wxColourDatabase}{wxcolourdatabase}, \helpref{wxPen}{wxpen}, \helpref{wxBrush}{wxbrush},\rtfsp
  39 \helpref{wxColourDialog}{wxcolourdialog}, \helpref{wxSystemSettings}{wxsystemsettings}
  40
  41 \latexignore{\rtfignore{\wxheading{Members}}}
  42
  43
  44 \membersection{wxColour::wxColour}\label{wxcolourconstr}
  45
  46 \func{}{wxColour}{\void}
  47
  48 Default constructor.
  49
  50 \func{}{wxColour}{\param{const unsigned char}{ red}, \param{const unsigned char}{ green}, \param{const unsigned char}{ blue}}
  51
  52 Constructs a colour from red, green and blue values.
  53
  54 \func{}{wxColour}{\param{const wxString\& }{colourNname}}
  55
  56 Constructs a colour object using a colour name
  57 listed in {\bf wxTheColourDatabase}.
  58
  59 \func{}{wxColour}{\param{const wxColour\&}{ colour}}
  60
  61 Copy constructor.
  62
  63 \wxheading{Parameters}
  64
  65 \docparam{red}{The red value.}
  66
  67 \docparam{green}{The green value.}
  68
  69 \docparam{blue}{The blue value.}
  70
  71 \docparam{colourName}{The colour name.}
  72
  73 \docparam{colour}{The colour to copy.}
  74
  75 \wxheading{See also}
  76
  77 \helpref{wxColourDatabase}{wxcolourdatabase}
  78
  79 \pythonnote{Constructors supported by wxPython are:\par
  80 \indented{2cm}{\begin{twocollist}
  81 \twocolitem{{\bf wxColour(red=0, green=0, blue=0)}}{}
  82 \twocolitem{{\bf wxNamedColour(name)}}{}
  83 \end{twocollist}}
  84 }
  85
  86
  87
  88 \membersection{wxColour::Blue}\label{wxcolourblue}
  89
  90 \constfunc{unsigned char}{Blue}{\void}
  91
  92 Returns the blue intensity.
  93
  94
  95 \membersection{wxColour::GetPixel}\label{wxcolourgetpixel}
  96
  97 \constfunc{long}{GetPixel}{\void}
  98
  99 Returns a pixel value which is platform-dependent. On Windows, a COLORREF is returned.
 100 On X, an allocated pixel value is returned.
 101
 102 -1 is returned if the pixel is invalid (on X, unallocated).
 103
 104
 105 \membersection{wxColour::Green}\label{wxcolourgreen}
 106
 107 \constfunc{unsigned char}{Green}{\void}
 108
 109 Returns the green intensity.
 110
 111
 112 \membersection{wxColour::Ok}\label{wxcolourok}
 113
 114 \constfunc{bool}{Ok}{\void}
 115
 116 Returns \true if the colour object is valid (the colour has been initialised with RGB values).
 117
 118
 119 \membersection{wxColour::Red}\label{wxcolourred}
 120
 121 \constfunc{unsigned char}{Red}{\void}
 122
 123 Returns the red intensity.
 124
 125
 126 \membersection{wxColour::Set}\label{wxcolourset}
 127
 128 \func{void}{Set}{\param{const unsigned char}{ red}, \param{const unsigned char}{ green}, \param{const unsigned char}{ blue}}
 129
 130 Sets the RGB intensity values.
 131
 132
 133 \membersection{wxColour::operator $=$}\label{wxcolourassign}
 134
 135 \func{wxColour\&}{operator $=$}{\param{const wxColour\&}{ colour}}
 136
 137 Assignment operator, taking another colour object.
 138
 139 \func{wxColour\&}{operator $=$}{\param{const wxString\&}{ colourName}}
 140
 141 Assignment operator, using a colour name to be found in the colour database.
 142
 143 \wxheading{See also}
 144
 145 \helpref{wxColourDatabase}{wxcolourdatabase}
 146
 147
 148 \membersection{wxColour::operator $==$}\label{wxcolourequality}
 149
 150 \func{bool}{operator $==$}{\param{const wxColour\&}{ colour}}
 151
 152 Tests the equality of two colours by comparing individual red, green blue colours.
 153
 154
 155 \membersection{wxColour::operator $!=$}\label{wxcolourinequality}
 156
 157 \func{bool}{operator $!=$}{\param{const wxColour\&}{ colour}}
 158
 159 Tests the inequality of two colours by comparing individual red, green blue colours.
 160
 161 \section{\class{wxColourData}}\label{wxcolourdata}
 162
 163 This class holds a variety of information related to colour dialogs.
 164
 165 \wxheading{Derived from}
 166
 167 \helpref{wxObject}{wxobject}
 168
 169 \wxheading{Include files}
 170
 171 <wx/cmndata.h>
 172
 173 \wxheading{See also}
 174
 175 \helpref{wxColour}{wxcolour}, \helpref{wxColourDialog}{wxcolourdialog}, \helpref{wxColourDialog overview}{wxcolourdialogoverview}
 176
 177 \latexignore{\rtfignore{\wxheading{Members}}}
 178
 179
 180 \membersection{wxColourData::wxColourData}\label{wxcolourdataconstr}
 181
 182 \func{}{wxColourData}{\void}
 183
 184 Constructor. Initializes the custom colours to white, the {\it data colour} setting
 185 to black, and the {\it choose full} setting to true.
 186
 187
 188 \membersection{wxColourData::\destruct{wxColourData}}
 189
 190 \func{}{\destruct{wxColourData}}{\void}
 191
 192 Destructor.
 193
 194
 195 \membersection{wxColourData::GetChooseFull}\label{wxcolourdatagetchoosefull}
 196
 197 \constfunc{bool}{GetChooseFull}{\void}
 198
 199 Under Windows, determines whether the Windows colour dialog will display the full dialog
 200 with custom colour selection controls. Has no meaning under other platforms.
 201
 202 The default value is true.
 203
 204
 205 \membersection{wxColourData::GetColour}\label{wxcolourdatagetcolour}
 206
 207 \constfunc{wxColour\&}{GetColour}{\void}
 208
 209 Gets the current colour associated with the colour dialog.
 210
 211 The default colour is black.
 212
 213
 214 \membersection{wxColourData::GetCustomColour}\label{wxcolourdatagetcustomcolour}
 215
 216 \constfunc{wxColour\&}{GetCustomColour}{\param{int}{ i}}
 217
 218 Gets the {\it i}th custom colour associated with the colour dialog. {\it i} should
 219 be an integer between 0 and 15.
 220
 221 The default custom colours are all white.
 222
 223
 224 \membersection{wxColourData::SetChooseFull}\label{wxcolourdatasetchoosefull}
 225
 226 \func{void}{SetChooseFull}{\param{const bool }{flag}}
 227
 228 Under Windows, tells the Windows colour dialog to display the full dialog
 229 with custom colour selection controls. Under other platforms, has no effect.
 230
 231 The default value is true.
 232
 233
 234 \membersection{wxColourData::SetColour}\label{wxcolourdatasetcolour}
 235
 236 \func{void}{SetColour}{\param{const wxColour\&}{ colour}}
 237
 238 Sets the default colour for the colour dialog.
 239
 240 The default colour is black.
 241
 242
 243 \membersection{wxColourData::SetCustomColour}\label{wxcolourdatasetcustomcolour}
 244
 245 \func{void}{SetCustomColour}{\param{int}{ i}, \param{const wxColour\&}{ colour}}
 246
 247 Sets the {\it i}th custom colour for the colour dialog. {\it i} should
 248 be an integer between 0 and 15.
 249
 250 The default custom colours are all white.
 251
 252
 253 \membersection{wxColourData::operator $=$}\label{wxcolourdataassign}
 254
 255 \func{void}{operator $=$}{\param{const wxColourData\&}{ data}}
 256
 257 Assignment operator for the colour data.
 258
 259
 260
 261
 262 \section{\class{wxColourDatabase}}\label{wxcolourdatabase}
 263
 264 wxWidgets maintains a database of standard RGB colours for a predefined
 265 set of named colours (such as ``BLACK'', ``LIGHT GREY''). The
 266 application may add to this set if desired by using
 267 \helpref{AddColour}{wxcolourdatabaseaddcolour} and may use it to look up
 268 colours by names using \helpref{Find}{wxcolourdatabasefind} or find the names
 269 for the standard colour suing \helpref{FindName}{wxcolourdatabasefindname}.
 270
 271 There is one predefined instance of this class called
 272 {\bf wxTheColourDatabase}.
 273
 274 \wxheading{Derived from}
 275
 276 None
 277
 278 \wxheading{Include files}
 279
 280 <wx/gdicmn.h>
 281
 282 \wxheading{Remarks}
 283
 284 The standard database contains at least the following colours:
 285
 286 AQUAMARINE, BLACK, BLUE, BLUE VIOLET, BROWN, CADET BLUE, CORAL,
 287 CORNFLOWER BLUE, CYAN, DARK GREY, DARK GREEN, DARK OLIVE GREEN, DARK
 288 ORCHID, DARK SLATE BLUE, DARK SLATE GREY DARK TURQUOISE, DIM GREY,
 289 FIREBRICK, FOREST GREEN, GOLD, GOLDENROD, GREY, GREEN, GREEN YELLOW,
 290 INDIAN RED, KHAKI, LIGHT BLUE, LIGHT GREY, LIGHT STEEL BLUE, LIME GREEN,
 291 MAGENTA, MAROON, MEDIUM AQUAMARINE, MEDIUM BLUE, MEDIUM FOREST GREEN,
 292 MEDIUM GOLDENROD, MEDIUM ORCHID, MEDIUM SEA GREEN, MEDIUM SLATE BLUE,
 293 MEDIUM SPRING GREEN, MEDIUM TURQUOISE, MEDIUM VIOLET RED, MIDNIGHT BLUE,
 294 NAVY, ORANGE, ORANGE RED, ORCHID, PALE GREEN, PINK, PLUM, PURPLE, RED,
 295 SALMON, SEA GREEN, SIENNA, SKY BLUE, SLATE BLUE, SPRING GREEN, STEEL
 296 BLUE, TAN, THISTLE, TURQUOISE, VIOLET, VIOLET RED, WHEAT, WHITE, YELLOW,
 297 YELLOW GREEN.
 298
 299 \wxheading{See also}
 300
 301 \helpref{wxColour}{wxcolour}
 302
 303 \latexignore{\rtfignore{\wxheading{Members}}}
 304
 305
 306 \membersection{wxColourDatabase::wxColourDatabase}\label{wxcolourdatabaseconstr}
 307
 308 \func{}{wxColourDatabase}{\void}
 309
 310 Constructs the colour database. It will be initialized at the first use.
 311
 312
 313 \membersection{wxColourDatabase::AddColour}\label{wxcolourdatabaseaddcolour}
 314
 315 \func{void}{AddColour}{\param{const wxString\& }{colourName}, \param{const wxColour\&}{colour}}
 316
 317 \func{void}{AddColour}{\param{const wxString\& }{colourName}, \param{wxColour* }{colour}}
 318
 319 Adds a colour to the database. If a colour with the same name already exists,
 320 it is replaced.
 321
 322 Please note that the overload taking a pointer is deprecated and will be
 323 removed in the next wxWidgets version, please don't use it.
 324
 325
 326 \membersection{wxColourDatabase::Find}\label{wxcolourdatabasefind}
 327
 328 \func{wxColour}{FindColour}{\param{const wxString\& }{colourName}}
 329
 330 Finds a colour given the name. Returns an invalid colour object (that is, such
 331 that its \helpref{Ok()}{wxcolourok} method returns \false) if the colour wasn't
 332 found in the database.
 333
 334
 335 \membersection{wxColourDatabase::FindColour}\label{wxcolourdatabasefindcolour}
 336
 337 \func{wxColour*}{FindColour}{\param{const wxString\& }{colourName}}
 338
 339 Finds a colour given the name. Returns \tt{NULL} if not found or a pointer which
 340 must be deleted by the caller otherwise.
 341
 342 Please note that this method is deprecated and will be removed in the next
 343 wxWidgets version, please use \helpref{Find}{wxcolourdatabasefind} instead of
 344 it.
 345
 346
 347 \membersection{wxColourDatabase::FindName}\label{wxcolourdatabasefindname}
 348
 349 \constfunc{wxString}{FindName}{\param{const wxColour\&}{ colour}}
 350
 351 Finds a colour name given the colour. Returns an empty string if the colour is
 352 not found in the database.
 353
 354