docs/latex/wx/slider.tex

   1 \section{\class{wxSlider}}\label{wxslider}
   2
   3 A slider is a control with a handle which can be pulled
   4 back and forth to change the value.
   5
   6 In Windows versions below Windows 95, a scrollbar is used to simulate the slider. In Windows 95,
   7 the track bar control is used.
   8
   9 Slider events are handled in the same way as a scrollbar.
  10
  11 \wxheading{Derived from}
  12
  13 \helpref{wxControl}{wxcontrol}\\
  14 \helpref{wxWindow}{wxwindow}\\
  15 \helpref{wxEvtHandler}{wxevthandler}\\
  16 \helpref{wxObject}{wxobject}
  17
  18 \wxheading{Window styles}
  19
  20 \twocolwidtha{5cm}
  21 \begin{twocollist}\itemsep=0pt
  22 \twocolitem{\windowstyle{wxSL\_HORIZONTAL}}{Displays the slider horizontally.}
  23 \twocolitem{\windowstyle{wxSL\_VERTICAL}}{Displays the slider vertically.}
  24 \twocolitem{\windowstyle{wxSL\_AUTOTICKS}}{Displays tick marks.}
  25 \twocolitem{\windowstyle{wxSL\_LABELS}}{Displays minimum, maximum and value labels.}
  26 \twocolitem{\windowstyle{wxSL\_LEFT}}{Displays ticks on the left, if a vertical slider.}
  27 \twocolitem{\windowstyle{wxSL\_RIGHT}}{Displays ticks on the right, if a vertical slider.}
  28 \twocolitem{\windowstyle{wxSL\_TOP}}{Displays ticks on the top, if a horizontal slider.}
  29 \twocolitem{\windowstyle{wxSL\_SELRANGE}}{Allows the user to select a range on the slider. Windows 95 only.}
  30 \end{twocollist}
  31
  32 See also \helpref{window styles overview}{windowstyles}.
  33
  34 \wxheading{Event handling}
  35
  36 To process input from a slider, use one of these event handler macros to direct input to member
  37 functions that take a \helpref{wxScrollEvent}{wxscrollevent} argument:
  38
  39 \twocolwidtha{7cm}
  40 \begin{twocollist}
  41 \twocolitem{{\bf EVT\_COMMAND\_SCROLL(id, func)}}{Catch all scroll commands.}
  42 \twocolitem{{\bf EVT\_COMMAND\_TOP(id, func)}}{Catch a command to put the scroll thumb at the maximum position.}
  43 \twocolitem{{\bf EVT\_COMMAND\_BOTTOM(id, func)}}{Catch a command to put the scroll thumb at the maximum position.}
  44 \twocolitem{{\bf EVT\_COMMAND\_LINEUP(id, func)}}{Catch a line up command.}
  45 \twocolitem{{\bf EVT\_COMMAND\_LINEDOWN(id, func)}}{Catch a line down command.}
  46 \twocolitem{{\bf EVT\_COMMAND\_PAGEUP(id, func)}}{Catch a page up command.}
  47 \twocolitem{{\bf EVT\_COMMAND\_PAGEDOWN(id, func)}}{Catch a page down command.}
  48 \twocolitem{{\bf EVT\_COMMAND\_THUMBTRACK(id, func)}}{Catch a thumbtrack command (continuous movement of the scroll thumb).}
  49 \twocolitem{{\bf EVT\_SLIDER(id, func)}}{Process a wxEVT\_COMMAND\_SLIDER\_UPDATED event,
  50 when the slider is moved. Though provided for backward compatibility, this is obsolete.}
  51 \end{twocollist}%
  52
  53 \wxheading{See also}
  54
  55 \helpref{Event handling overview}{eventhandlingoverview}, \helpref{wxScrollBar}{wxscrollbar}
  56
  57 \latexignore{\rtfignore{\wxheading{Members}}}
  58
  59 \membersection{wxSlider::wxSlider}\label{wxsliderconstr}
  60
  61 \func{}{wxSlider}{\void}
  62
  63 Default slider.
  64
  65 \func{}{wxSlider}{\param{wxWindow* }{parent}, \param{wxWindowID }{id}, \param{int }{value },\rtfsp
  66 \param{int}{ minValue}, \param{int}{ maxValue},\rtfsp
  67 \param{const wxPoint\& }{point = wxDefaultPosition}, \param{const wxSize\& }{size = wxDefaultSize},\rtfsp
  68 \param{long}{ style = wxSL\_HORIZONTAL},\rtfsp
  69 \param{const wxValidator\& }{validator = wxDefaultValidator},\rtfsp
  70 \param{const wxString\& }{name = ``slider"}}
  71
  72 Constructor, creating and showing a slider.
  73
  74 \wxheading{Parameters}
  75
  76 \docparam{parent}{Parent window. Must not be NULL.}
  77
  78 \docparam{id}{Window identifier. A value of -1 indicates a default value.}
  79
  80 \docparam{value}{Initial position for the slider.}
  81
  82 \docparam{minValue}{Minimum slider position.}
  83
  84 \docparam{maxValue}{Maximum slider position.}
  85
  86 \docparam{size}{Window size. If the default size (-1, -1) is specified then a default size is chosen.}
  87
  88 \docparam{style}{Window style. See \helpref{wxSlider}{wxslider}.}
  89
  90 \docparam{validator}{Window validator.}
  91
  92 \docparam{name}{Window name.}
  93
  94 \wxheading{See also}
  95
  96 \helpref{wxSlider::Create}{wxslidercreate}, \helpref{wxValidator}{wxvalidator}
  97
  98 \membersection{wxSlider::\destruct{wxSlider}}
  99
 100 \func{void}{\destruct{wxSlider}}{\void}
 101
 102 Destructor, destroying the slider.
 103
 104 \membersection{wxSlider::ClearSel}\label{wxsliderclearsel}
 105
 106 \func{void}{ClearSel}{\void}
 107
 108 Clears the selection, for a slider with the {\bf wxSL\_SELRANGE} style.
 109
 110 \wxheading{Remarks}
 111
 112 Windows 95 only.
 113
 114 \membersection{wxSlider::ClearTicks}\label{wxsliderclearticks}
 115
 116 \func{void}{ClearTicks}{\void}
 117
 118 Clears the ticks.
 119
 120 \wxheading{Remarks}
 121
 122 Windows 95 only.
 123
 124 \membersection{wxSlider::Create}\label{wxslidercreate}
 125
 126 \func{bool}{Create}{\param{wxWindow* }{parent}, \param{wxWindowID }{id}, \param{int }{value },\rtfsp
 127 \param{int}{ minValue}, \param{int}{ maxValue},\rtfsp
 128 \param{const wxPoint\& }{point = wxDefaultPosition}, \param{const wxSize\& }{size = wxDefaultSize},\rtfsp
 129 \param{long}{ style = wxSL\_HORIZONTAL},\rtfsp
 130 \param{const wxValidator\& }{validator = wxDefaultValidator},\rtfsp
 131 \param{const wxString\& }{name = ``slider"}}
 132
 133 Used for two-step slider construction. See \helpref{wxSlider::wxSlider}{wxsliderconstr}\rtfsp
 134 for further details.
 135
 136 \membersection{wxSlider::GetLineSize}\label{wxslidergetlinesize}
 137
 138 \constfunc{int}{GetLineSize}{\void}
 139
 140 Returns the line size.
 141
 142 \wxheading{See also}
 143
 144 \helpref{wxSlider::SetLineSize}{wxslidersetlinesize}
 145
 146 \membersection{wxSlider::GetMax}\label{wxslidergetmax}
 147
 148 \constfunc{int}{GetMax}{\void}
 149
 150 Gets the maximum slider value.
 151
 152 \wxheading{See also}
 153
 154 \helpref{wxSlider::GetMin}{wxslidergetmin}, \helpref{wxSlider::SetRange}{wxslidersetrange}
 155
 156 \membersection{wxSlider::GetMin}\label{wxslidergetmin}
 157
 158 \constfunc{int}{GetMin}{\void}
 159
 160 Gets the minimum slider value.
 161
 162 \wxheading{See also}
 163
 164 \helpref{wxSlider::GetMin}{wxslidergetmin}, \helpref{wxSlider::SetRange}{wxslidersetrange}
 165
 166 \membersection{wxSlider::GetPageSize}\label{wxslidergetpagesize}
 167
 168 \constfunc{int}{GetPageSize}{\void}
 169
 170 Returns the page size.
 171
 172 \wxheading{See also}
 173
 174 \helpref{wxSlider::SetPageSize}{wxslidersetpagesize}
 175
 176 \membersection{wxSlider::GetSelEnd}\label{wxslidergetselend}
 177
 178 \constfunc{int}{GetSelEnd}{\void}
 179
 180 Returns the selection end point.
 181
 182 \wxheading{Remarks}
 183
 184 Windows 95 only.
 185
 186 \wxheading{See also}
 187
 188 \helpref{wxSlider::GetSelStart}{wxslidergetselstart}, \helpref{wxSlider::SetSelection}{wxslidersetselection}
 189
 190 \membersection{wxSlider::GetSelStart}\label{wxslidergetselstart}
 191
 192 \constfunc{int}{GetSelStart}{\void}
 193
 194 Returns the selection start point.
 195
 196 \wxheading{Remarks}
 197
 198 Windows 95 only.
 199
 200 \wxheading{See also}
 201
 202 \helpref{wxSlider::GetSelEnd}{wxslidergetselend}, \helpref{wxSlider::SetSelection}{wxslidersetselection}
 203
 204 \membersection{wxSlider::GetThumbLength}\label{wxslidergetthumblength}
 205
 206 \constfunc{int}{GetThumbLength}{\void}
 207
 208 Returns the thumb length.
 209
 210 \wxheading{Remarks}
 211
 212 Windows 95 only.
 213
 214 \wxheading{See also}
 215
 216 \helpref{wxSlider::SetThumbLength}{wxslidersetthumblength}
 217
 218 \membersection{wxSlider::GetTickFreq}\label{wxslidergettickfreq}
 219
 220 \constfunc{int}{GetTickFreq}{\void}
 221
 222 Returns the tick frequency.
 223
 224 \wxheading{Remarks}
 225
 226 Windows 95 only.
 227
 228 \wxheading{See also}
 229
 230 \helpref{wxSlider::SetTickFreq}{wxslidersettickfreq}
 231
 232 \membersection{wxSlider::GetValue}\label{wxslidergetvalue}
 233
 234 \constfunc{int}{GetValue}{\void}
 235
 236 Gets the current slider value.
 237
 238 \wxheading{See also}
 239
 240 \helpref{wxSlider::GetMin}{wxslidergetmin}, \helpref{wxSlider::GetMax}{wxslidergetmax},\rtfsp
 241 \helpref{wxSlider::SetValue}{wxslidersetvalue}
 242
 243 \membersection{wxSlider::SetRange}\label{wxslidersetrange}
 244
 245 \func{void}{SetRange}{\param{int}{ minValue}, \param{int}{ maxValue}}
 246
 247 Sets the minimum and maximum slider values.
 248
 249 \wxheading{See also}
 250
 251 \helpref{wxSlider::GetMin}{wxslidergetmin}, \helpref{wxSlider::GetMax}{wxslidergetmax}
 252
 253 \membersection{wxSlider::SetTickFreq}\label{wxslidersettickfreq}
 254
 255 \func{void}{SetTickFreq}{\param{int }{n}, \param{int }{pos}}
 256
 257 Sets the tick mark frequency and position.
 258
 259 \wxheading{Parameters}
 260
 261 \docparam{n}{Frequency. For example, if the frequency is set to two, a tick mark is displayed for
 262 every other increment in the slider's range.}
 263
 264 \docparam{pos}{Position. Must be greater than zero. TODO: what is this for?}
 265
 266 \wxheading{Remarks}
 267
 268 Windows 95 only.
 269
 270 \wxheading{See also}
 271
 272 \helpref{wxSlider::GetTickFreq}{wxslidergettickfreq}
 273
 274 \membersection{wxSlider::SetLineSize}\label{wxslidersetlinesize}
 275
 276 \func{void}{SetLineSize}{\param{int }{lineSize}}
 277
 278 Sets the line size for the slider.
 279
 280 \wxheading{Parameters}
 281
 282 \docparam{lineSize}{The number of steps the slider moves when the user moves it up or down a line.}
 283
 284 \wxheading{See also}
 285
 286 \helpref{wxSlider::GetLineSize}{wxslidergetlinesize}
 287
 288 \membersection{wxSlider::SetPageSize}\label{wxslidersetpagesize}
 289
 290 \func{void}{SetPageSize}{\param{int }{pageSize}}
 291
 292 Sets the page size for the slider.
 293
 294 \wxheading{Parameters}
 295
 296 \docparam{pageSize}{The number of steps the slider moves when the user pages up or down.}
 297
 298 \wxheading{See also}
 299
 300 \helpref{wxSlider::GetPageSize}{wxslidergetpagesize}
 301
 302 \membersection{wxSlider::SetSelection}\label{wxslidersetselection}
 303
 304 \func{void}{SetSelection}{\param{int }{startPos}, \param{int }{endPos}}
 305
 306 Sets the selection.
 307
 308 \wxheading{Parameters}
 309
 310 \docparam{startPos}{The selection start position.}
 311
 312 \docparam{endPos}{The selection end position.}
 313
 314 \wxheading{Remarks}
 315
 316 Windows 95 only.
 317
 318 \wxheading{See also}
 319
 320 \helpref{wxSlider::GetSelStart}{wxslidergetselstart}, \helpref{wxSlider::GetSelEnd}{wxslidergetselend}
 321
 322 \membersection{wxSlider::SetThumbLength}\label{wxslidersetthumblength}
 323
 324 \func{void}{SetThumbLength}{\param{int }{len}}
 325
 326 Sets the slider thumb length.
 327
 328 \wxheading{Parameters}
 329
 330 \docparam{len}{The thumb length.}
 331
 332 \wxheading{Remarks}
 333
 334 Windows 95 only.
 335
 336 \wxheading{See also}
 337
 338 \helpref{wxSlider::GetThumbLength}{wxslidergetthumblength}
 339
 340 \membersection{wxSlider::SetTick}\label{wxslidersettick}
 341
 342 \func{void}{SetTick}{\param{int}{ tickPos}}
 343
 344 Sets a tick position.
 345
 346 \wxheading{Parameters}
 347
 348 \docparam{tickPos}{The tick position.}
 349
 350 \wxheading{Remarks}
 351
 352 Windows 95 only.
 353
 354 \wxheading{See also}
 355
 356 \helpref{wxSlider::SetTickFreq}{wxslidersettickfreq}
 357
 358 \membersection{wxSlider::SetValue}\label{wxslidersetvalue}
 359
 360 \func{void}{SetValue}{\param{int}{ value}}
 361
 362 Sets the slider position.
 363
 364 \wxheading{Parameters}
 365
 366 \docparam{value}{The slider position.}
 367
 368 \wxheading{See also}
 369
 370 \helpref{wxSlider::GetValue}{wxslidergetvalue}
 371