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{wxcolourdatactor}
 181
 182 \func{}{wxColourData}{\void}
 183
 184 Constructor. Initializes the custom colours to {\tt wxNullColour},
 185 the {\it data colour} setting
 186 to black, and the {\it choose full} setting to true.
 187
 188
 189 \membersection{wxColourData::\destruct{wxColourData}}\label{wxcolourdatadtor}
 190
 191 \func{}{\destruct{wxColourData}}{\void}
 192
 193 Destructor.
 194
 195
 196 \membersection{wxColourData::GetChooseFull}\label{wxcolourdatagetchoosefull}
 197
 198 \constfunc{bool}{GetChooseFull}{\void}
 199
 200 Under Windows, determines whether the Windows colour dialog will display the full dialog
 201 with custom colour selection controls. Under PalmOS, determines whether colour dialog
 202 will display full rgb colour picker or only available palette indexer.
 203 Has no meaning under other platforms.
 204
 205 The default value is true.
 206
 207
 208 \membersection{wxColourData::GetColour}\label{wxcolourdatagetcolour}
 209
 210 \constfunc{wxColour\&}{GetColour}{\void}
 211
 212 Gets the current colour associated with the colour dialog.
 213
 214 The default colour is black.
 215
 216
 217 \membersection{wxColourData::GetCustomColour}\label{wxcolourdatagetcustomcolour}
 218
 219 \constfunc{wxColour\&}{GetCustomColour}{\param{int}{ i}}
 220
 221 Gets the {\it i}th custom colour associated with the colour dialog. {\it i} should
 222 be an integer between 0 and 15.
 223
 224 The default custom colours are invalid colours.
 225
 226
 227 \membersection{wxColourData::SetChooseFull}\label{wxcolourdatasetchoosefull}
 228
 229 \func{void}{SetChooseFull}{\param{const bool }{flag}}
 230
 231 Under Windows, tells the Windows colour dialog to display the full dialog
 232 with custom colour selection controls. Under other platforms, has no effect.
 233
 234 The default value is true.
 235
 236
 237 \membersection{wxColourData::SetColour}\label{wxcolourdatasetcolour}
 238
 239 \func{void}{SetColour}{\param{const wxColour\&}{ colour}}
 240
 241 Sets the default colour for the colour dialog.
 242
 243 The default colour is black.
 244
 245
 246 \membersection{wxColourData::SetCustomColour}\label{wxcolourdatasetcustomcolour}
 247
 248 \func{void}{SetCustomColour}{\param{int}{ i}, \param{const wxColour\&}{ colour}}
 249
 250 Sets the {\it i}th custom colour for the colour dialog. {\it i} should
 251 be an integer between 0 and 15.
 252
 253 The default custom colours are invalid colours.
 254
 255
 256 \membersection{wxColourData::operator $=$}\label{wxcolourdataassign}
 257
 258 \func{void}{operator $=$}{\param{const wxColourData\&}{ data}}
 259
 260 Assignment operator for the colour data.
 261
 262
 263
 264
 265 \section{\class{wxColourDatabase}}\label{wxcolourdatabase}
 266
 267 wxWidgets maintains a database of standard RGB colours for a predefined
 268 set of named colours (such as ``BLACK'', ``LIGHT GREY''). The
 269 application may add to this set if desired by using
 270 \helpref{AddColour}{wxcolourdatabaseaddcolour} and may use it to look up
 271 colours by names using \helpref{Find}{wxcolourdatabasefind} or find the names
 272 for the standard colour suing \helpref{FindName}{wxcolourdatabasefindname}.
 273
 274 There is one predefined instance of this class called
 275 {\bf wxTheColourDatabase}.
 276
 277 \wxheading{Derived from}
 278
 279 None
 280
 281 \wxheading{Include files}
 282
 283 <wx/gdicmn.h>
 284
 285 \wxheading{Remarks}
 286
 287 The standard database contains at least the following colours:
 288
 289 AQUAMARINE, BLACK, BLUE, BLUE VIOLET, BROWN, CADET BLUE, CORAL,
 290 CORNFLOWER BLUE, CYAN, DARK GREY, DARK GREEN, DARK OLIVE GREEN, DARK
 291 ORCHID, DARK SLATE BLUE, DARK SLATE GREY DARK TURQUOISE, DIM GREY,
 292 FIREBRICK, FOREST GREEN, GOLD, GOLDENROD, GREY, GREEN, GREEN YELLOW,
 293 INDIAN RED, KHAKI, LIGHT BLUE, LIGHT GREY, LIGHT STEEL BLUE, LIME GREEN,
 294 MAGENTA, MAROON, MEDIUM AQUAMARINE, MEDIUM BLUE, MEDIUM FOREST GREEN,
 295 MEDIUM GOLDENROD, MEDIUM ORCHID, MEDIUM SEA GREEN, MEDIUM SLATE BLUE,
 296 MEDIUM SPRING GREEN, MEDIUM TURQUOISE, MEDIUM VIOLET RED, MIDNIGHT BLUE,
 297 NAVY, ORANGE, ORANGE RED, ORCHID, PALE GREEN, PINK, PLUM, PURPLE, RED,
 298 SALMON, SEA GREEN, SIENNA, SKY BLUE, SLATE BLUE, SPRING GREEN, STEEL
 299 BLUE, TAN, THISTLE, TURQUOISE, VIOLET, VIOLET RED, WHEAT, WHITE, YELLOW,
 300 YELLOW GREEN.
 301
 302 \wxheading{See also}
 303
 304 \helpref{wxColour}{wxcolour}
 305
 306 \latexignore{\rtfignore{\wxheading{Members}}}
 307
 308
 309 \membersection{wxColourDatabase::wxColourDatabase}\label{wxcolourdatabaseconstr}
 310
 311 \func{}{wxColourDatabase}{\void}
 312
 313 Constructs the colour database. It will be initialized at the first use.
 314
 315
 316 \membersection{wxColourDatabase::AddColour}\label{wxcolourdatabaseaddcolour}
 317
 318 \func{void}{AddColour}{\param{const wxString\& }{colourName}, \param{const wxColour\&}{colour}}
 319
 320 \func{void}{AddColour}{\param{const wxString\& }{colourName}, \param{wxColour* }{colour}}
 321
 322 Adds a colour to the database. If a colour with the same name already exists,
 323 it is replaced.
 324
 325 Please note that the overload taking a pointer is deprecated and will be
 326 removed in the next wxWidgets version, please don't use it.
 327
 328
 329 \membersection{wxColourDatabase::Find}\label{wxcolourdatabasefind}
 330
 331 \func{wxColour}{Find}{\param{const wxString\& }{colourName}}
 332
 333 Finds a colour given the name. Returns an invalid colour object (that is, such
 334 that its \helpref{Ok()}{wxcolourok} method returns \false) if the colour wasn't
 335 found in the database.
 336
 337
 338 \membersection{wxColourDatabase::FindName}\label{wxcolourdatabasefindname}
 339
 340 \constfunc{wxString}{FindName}{\param{const wxColour\&}{ colour}}
 341
 342 Finds a colour name given the colour. Returns an empty string if the colour is
 343 not found in the database.
 344
 345