| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/univ/slider.cpp |
| 3 | // Purpose: implementation of the universal version of wxSlider |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: 09.02.01 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 2001 SciTech Software, Inc. (www.scitechsoft.com) |
| 9 | // Licence: wxWindows licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | /* |
| 13 | There is some discrepancy in wxSL_LABELS style handling between wxMSW and |
| 14 | wxGTK: the latter handles it natively and shows only the current value of |
| 15 | the slider on the side corresponding to wxSL_TOP/BOTTOM/LEFT/RIGHT style |
| 16 | given (which can be combined with wxSL_HORIZONTAL/VERTICAL) while wxMSW |
| 17 | emulates this somehow and shows the min and max values near the ends of the |
| 18 | slider and the current value in a separate static box nearby. |
| 19 | |
| 20 | We currently follow wxGTK except that wxSL_HORIZONTAL slider can only have |
| 21 | the label displayed on top or bottom of it and wxSL_VERTICAL - to the left |
| 22 | or right. |
| 23 | |
| 24 | What we really need is probably a more fine grain control on labels, i.e. we |
| 25 | should be able to select if we show nothing at all, the current value only |
| 26 | or the value and the limits - the current approach is just that of the |
| 27 | lowest common denominator. |
| 28 | |
| 29 | TODO: |
| 30 | |
| 31 | +0. add ticks support |
| 32 | 1. support for all orientations |
| 33 | 2. draw the slider thumb highlighted when it is dragged |
| 34 | ?3. manual ticks support? |
| 35 | */ |
| 36 | |
| 37 | // ============================================================================ |
| 38 | // declarations |
| 39 | // ============================================================================ |
| 40 | |
| 41 | // ---------------------------------------------------------------------------- |
| 42 | // headers |
| 43 | // ---------------------------------------------------------------------------- |
| 44 | |
| 45 | #include "wx/wxprec.h" |
| 46 | |
| 47 | #ifdef __BORLANDC__ |
| 48 | #pragma hdrstop |
| 49 | #endif |
| 50 | |
| 51 | #ifndef WX_PRECOMP |
| 52 | #include "wx/dc.h" |
| 53 | #endif |
| 54 | |
| 55 | #include "wx/slider.h" |
| 56 | |
| 57 | #if wxUSE_SLIDER |
| 58 | |
| 59 | #include "wx/univ/renderer.h" |
| 60 | #include "wx/univ/inphand.h" |
| 61 | #include "wx/univ/theme.h" |
| 62 | |
| 63 | // ---------------------------------------------------------------------------- |
| 64 | // constants |
| 65 | // ---------------------------------------------------------------------------- |
| 66 | |
| 67 | // the margin between the slider and the label (FIXME: hardcoded) |
| 68 | static const wxCoord SLIDER_LABEL_MARGIN = 2; |
| 69 | |
| 70 | // ============================================================================ |
| 71 | // implementation of wxSlider |
| 72 | // ============================================================================ |
| 73 | |
| 74 | IMPLEMENT_DYNAMIC_CLASS(wxSlider, wxControl) |
| 75 | |
| 76 | BEGIN_EVENT_TABLE(wxSlider, wxControl) |
| 77 | EVT_SIZE(wxSlider::OnSize) |
| 78 | END_EVENT_TABLE() |
| 79 | |
| 80 | // ---------------------------------------------------------------------------- |
| 81 | // wxSlider creation |
| 82 | // ---------------------------------------------------------------------------- |
| 83 | |
| 84 | #ifdef __VISUALC__ |
| 85 | // warning C4355: 'this' : used in base member initializer list |
| 86 | #pragma warning(disable:4355) |
| 87 | #endif |
| 88 | |
| 89 | wxSlider::wxSlider() |
| 90 | : m_thumb(this) |
| 91 | { |
| 92 | Init(); |
| 93 | } |
| 94 | |
| 95 | wxSlider::wxSlider(wxWindow *parent, |
| 96 | wxWindowID id, |
| 97 | int value, int minValue, int maxValue, |
| 98 | const wxPoint& pos, |
| 99 | const wxSize& size, |
| 100 | long style, |
| 101 | const wxValidator& validator, |
| 102 | const wxString& name) |
| 103 | : m_thumb(this) |
| 104 | { |
| 105 | Init(); |
| 106 | |
| 107 | (void)Create(parent, id, value, minValue, maxValue, |
| 108 | pos, size, style, validator, name); |
| 109 | } |
| 110 | |
| 111 | #ifdef __VISUALC__ |
| 112 | // warning C4355: 'this' : used in base member initializer list |
| 113 | #pragma warning(default:4355) |
| 114 | #endif |
| 115 | |
| 116 | void wxSlider::Init() |
| 117 | { |
| 118 | m_min = |
| 119 | m_max = |
| 120 | m_value = 0; |
| 121 | |
| 122 | m_tickFreq = 1; |
| 123 | |
| 124 | m_lineSize = |
| 125 | m_pageSize = 0; |
| 126 | |
| 127 | m_thumbSize = 0; |
| 128 | m_thumbFlags = 0; |
| 129 | } |
| 130 | |
| 131 | bool wxSlider::Create(wxWindow *parent, |
| 132 | wxWindowID id, |
| 133 | int value, int minValue, int maxValue, |
| 134 | const wxPoint& pos, |
| 135 | const wxSize& size, |
| 136 | long style, |
| 137 | const wxValidator& validator, |
| 138 | const wxString& name) |
| 139 | { |
| 140 | if ( !wxSliderBase::Create(parent, id, pos, size, style, |
| 141 | validator, name) ) |
| 142 | return false; |
| 143 | |
| 144 | SetRange(minValue, maxValue); |
| 145 | SetValue(value); |
| 146 | |
| 147 | // call this after setting the range as the best size depends (at least if |
| 148 | // we have wxSL_LABELS style) on the range |
| 149 | SetBestSize(size); |
| 150 | |
| 151 | CreateInputHandler(wxINP_HANDLER_SLIDER); |
| 152 | |
| 153 | return true; |
| 154 | } |
| 155 | |
| 156 | // ---------------------------------------------------------------------------- |
| 157 | // wxSlider range and value |
| 158 | // ---------------------------------------------------------------------------- |
| 159 | |
| 160 | int wxSlider::GetValue() const |
| 161 | { |
| 162 | return m_value; |
| 163 | } |
| 164 | |
| 165 | int wxSlider::NormalizeValue(int value) const |
| 166 | { |
| 167 | if ( value < m_min ) |
| 168 | return m_min; |
| 169 | else if ( value > m_max ) |
| 170 | return m_max; |
| 171 | else |
| 172 | return value; |
| 173 | } |
| 174 | |
| 175 | bool wxSlider::ChangeValueBy(int inc) |
| 176 | { |
| 177 | return ChangeValueTo(NormalizeValue(m_value + inc)); |
| 178 | } |
| 179 | |
| 180 | bool wxSlider::ChangeValueTo(int value) |
| 181 | { |
| 182 | // check if the value is going to change at all |
| 183 | if (value == m_value) |
| 184 | return false; |
| 185 | |
| 186 | // this method is protected and we should only call it with normalized |
| 187 | // value! |
| 188 | wxCHECK_MSG( IsInRange(value), false, _T("invalid slider value") ); |
| 189 | |
| 190 | m_value = value; |
| 191 | |
| 192 | Refresh(); |
| 193 | |
| 194 | // generate the events: both a specific scroll event and a command event |
| 195 | wxScrollEvent eventScroll(wxEVT_SCROLL_CHANGED, GetId()); |
| 196 | eventScroll.SetPosition(m_value); |
| 197 | eventScroll.SetEventObject( this ); |
| 198 | (void)GetEventHandler()->ProcessEvent(eventScroll); |
| 199 | |
| 200 | wxCommandEvent event(wxEVT_COMMAND_SLIDER_UPDATED, GetId()); |
| 201 | event.SetInt(m_value); |
| 202 | event.SetEventObject(this); |
| 203 | (void)GetEventHandler()->ProcessEvent(event); |
| 204 | |
| 205 | return true; |
| 206 | } |
| 207 | |
| 208 | void wxSlider::SetValue(int value) |
| 209 | { |
| 210 | value = NormalizeValue(value); |
| 211 | |
| 212 | if ( m_value != value ) |
| 213 | { |
| 214 | m_value = value; |
| 215 | |
| 216 | Refresh(); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | void wxSlider::SetRange(int minValue, int maxValue) |
| 221 | { |
| 222 | if ( minValue > maxValue ) |
| 223 | { |
| 224 | // swap them, we always want min to be less than max |
| 225 | int tmp = minValue; |
| 226 | minValue = maxValue; |
| 227 | maxValue = tmp; |
| 228 | } |
| 229 | |
| 230 | if ( m_min != minValue || m_max != maxValue ) |
| 231 | { |
| 232 | m_min = minValue; |
| 233 | m_max = maxValue; |
| 234 | |
| 235 | // reset the value to make sure it is in the new range |
| 236 | SetValue(m_value); |
| 237 | |
| 238 | // the size of the label rect might have changed |
| 239 | if ( HasLabels() ) |
| 240 | { |
| 241 | CalcGeometry(); |
| 242 | } |
| 243 | |
| 244 | Refresh(); |
| 245 | } |
| 246 | //else: nothing changed |
| 247 | } |
| 248 | |
| 249 | int wxSlider::GetMin() const |
| 250 | { |
| 251 | return m_min; |
| 252 | } |
| 253 | |
| 254 | int wxSlider::GetMax() const |
| 255 | { |
| 256 | return m_max; |
| 257 | } |
| 258 | |
| 259 | // ---------------------------------------------------------------------------- |
| 260 | // wxSlider line/page/thumb size |
| 261 | // ---------------------------------------------------------------------------- |
| 262 | |
| 263 | void wxSlider::SetLineSize(int lineSize) |
| 264 | { |
| 265 | wxCHECK_RET( lineSize >= 0, _T("invalid slider line size") ); |
| 266 | |
| 267 | m_lineSize = lineSize; |
| 268 | } |
| 269 | |
| 270 | void wxSlider::SetPageSize(int pageSize) |
| 271 | { |
| 272 | wxCHECK_RET( pageSize >= 0, _T("invalid slider page size") ); |
| 273 | |
| 274 | m_pageSize = pageSize; |
| 275 | } |
| 276 | |
| 277 | int wxSlider::GetLineSize() const |
| 278 | { |
| 279 | if ( !m_lineSize ) |
| 280 | { |
| 281 | // the default line increment is 1 |
| 282 | wxConstCast(this, wxSlider)->m_lineSize = 1; |
| 283 | } |
| 284 | |
| 285 | return m_lineSize; |
| 286 | } |
| 287 | |
| 288 | int wxSlider::GetPageSize() const |
| 289 | { |
| 290 | if ( !m_pageSize ) |
| 291 | { |
| 292 | // the default page increment is m_tickFreq |
| 293 | wxConstCast(this, wxSlider)->m_pageSize = m_tickFreq; |
| 294 | } |
| 295 | |
| 296 | return m_pageSize; |
| 297 | } |
| 298 | |
| 299 | void wxSlider::SetThumbLength(int lenPixels) |
| 300 | { |
| 301 | wxCHECK_RET( lenPixels >= 0, _T("invalid slider thumb size") ); |
| 302 | |
| 303 | // use m_thumbSize here directly and not GetThumbLength() to avoid setting |
| 304 | // it to the default value as we don't need it |
| 305 | if ( lenPixels != m_thumbSize ) |
| 306 | { |
| 307 | m_thumbSize = lenPixels; |
| 308 | |
| 309 | Refresh(); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | int wxSlider::GetThumbLength() const |
| 314 | { |
| 315 | wxSize sz = GetDefaultThumbSize(); |
| 316 | int len = (IsVert() ? sz.x : sz.y); |
| 317 | if (m_thumbSize > len) |
| 318 | { |
| 319 | return m_thumbSize; |
| 320 | } |
| 321 | else |
| 322 | { |
| 323 | return len; |
| 324 | } |
| 325 | |
| 326 | } |
| 327 | |
| 328 | // ---------------------------------------------------------------------------- |
| 329 | // wxSlider ticks |
| 330 | // ---------------------------------------------------------------------------- |
| 331 | |
| 332 | void wxSlider::SetTickFreq(int n, int WXUNUSED(dummy)) |
| 333 | { |
| 334 | wxCHECK_RET (n > 0, _T("invalid slider tick frequency")); |
| 335 | |
| 336 | if ( n != m_tickFreq ) |
| 337 | { |
| 338 | m_tickFreq = n; |
| 339 | |
| 340 | Refresh(); |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | // ---------------------------------------------------------------------------- |
| 345 | // wxSlider geometry |
| 346 | // ---------------------------------------------------------------------------- |
| 347 | |
| 348 | wxSize wxSlider::CalcLabelSize() const |
| 349 | { |
| 350 | wxSize size; |
| 351 | |
| 352 | // there is no sense in trying to calc the labels size if we haven't got |
| 353 | // any, the caller must check for it |
| 354 | wxCHECK_MSG( HasLabels(), size, _T("shouldn't be called") ); |
| 355 | |
| 356 | wxCoord w1, h1, w2, h2; |
| 357 | GetTextExtent(FormatValue(m_min), &w1, &h1); |
| 358 | GetTextExtent(FormatValue(m_max), &w2, &h2); |
| 359 | |
| 360 | size.x = wxMax(w1, w2); |
| 361 | size.y = wxMax(h1, h2); |
| 362 | |
| 363 | return size; |
| 364 | } |
| 365 | |
| 366 | wxSize wxSlider::DoGetBestClientSize() const |
| 367 | { |
| 368 | // this dimension is completely arbitrary |
| 369 | static const wxCoord SLIDER_WIDTH = 40; |
| 370 | |
| 371 | long style = GetWindowStyle(); |
| 372 | |
| 373 | // first calculate the size of the slider itself: i.e. the shaft and the |
| 374 | // thumb |
| 375 | wxCoord height = GetRenderer()->GetSliderDim(); |
| 376 | |
| 377 | wxSize size; |
| 378 | if ( IsVert() ) |
| 379 | { |
| 380 | size.x = height; |
| 381 | size.y = SLIDER_WIDTH; |
| 382 | } |
| 383 | else // horizontal |
| 384 | { |
| 385 | size.x = SLIDER_WIDTH; |
| 386 | size.y = height; |
| 387 | } |
| 388 | |
| 389 | // add space for ticks |
| 390 | if ( HasTicks() ) |
| 391 | { |
| 392 | wxCoord lenTick = GetRenderer()->GetSliderTickLen(); |
| 393 | if (style & wxSL_BOTH) |
| 394 | { |
| 395 | lenTick = 2 * lenTick; |
| 396 | } |
| 397 | |
| 398 | if ( IsVert() ) |
| 399 | size.x += lenTick; |
| 400 | else |
| 401 | size.y += lenTick; |
| 402 | } |
| 403 | |
| 404 | // if we have the label, reserve enough space for it |
| 405 | if ( HasLabels() ) |
| 406 | { |
| 407 | wxSize sizeLabels = CalcLabelSize(); |
| 408 | |
| 409 | if (style & (wxSL_LEFT|wxSL_RIGHT)) |
| 410 | { |
| 411 | size.x += sizeLabels.x + SLIDER_LABEL_MARGIN; |
| 412 | } |
| 413 | else if (style & (wxSL_TOP|wxSL_BOTTOM)) |
| 414 | { |
| 415 | size.y += sizeLabels.y + SLIDER_LABEL_MARGIN; |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | return size; |
| 420 | } |
| 421 | |
| 422 | void wxSlider::OnSize(wxSizeEvent& event) |
| 423 | { |
| 424 | CalcGeometry(); |
| 425 | |
| 426 | event.Skip(); |
| 427 | } |
| 428 | |
| 429 | const wxRect& wxSlider::GetSliderRect() const |
| 430 | { |
| 431 | if ( m_rectSlider.width < 0 ) |
| 432 | { |
| 433 | wxConstCast(this, wxSlider)->CalcGeometry(); |
| 434 | } |
| 435 | |
| 436 | return m_rectSlider; |
| 437 | } |
| 438 | |
| 439 | void wxSlider::CalcGeometry() |
| 440 | { |
| 441 | /* |
| 442 | recalc the label and slider positions, this looks like this for |
| 443 | wxSL_HORIZONTAL | wxSL_TOP slider: |
| 444 | |
| 445 | LLL lll |
| 446 | ------------------------- |
| 447 | | T | <-- this is the slider rect |
| 448 | | HHHHHHHHHHHHHHHTHHHHH | |
| 449 | | T | |
| 450 | | * * * * * * * *| |
| 451 | ------------------------- |
| 452 | |
| 453 | LLL is m_rectLabel as calculated here and lll is the real rect used for |
| 454 | label drawing in OnDraw() (TTT indicated the thumb position and *s are |
| 455 | the ticks) |
| 456 | |
| 457 | in the wxSL_VERTICAL | wxSL_RIGHT case the picture is like this: |
| 458 | |
| 459 | ------ LLL |
| 460 | | H | |
| 461 | | H *| |
| 462 | | H | |
| 463 | | H *| |
| 464 | | H | |
| 465 | | H *| |
| 466 | | H | |
| 467 | |TTT*| lll |
| 468 | | H | |
| 469 | | H *| |
| 470 | ------ |
| 471 | */ |
| 472 | long style = GetWindowStyle(); |
| 473 | |
| 474 | // initialize to the full client rect |
| 475 | wxRect rectTotal = GetClientRect(); |
| 476 | m_rectSlider = rectTotal; |
| 477 | wxSize sizeThumb = GetThumbSize(); |
| 478 | |
| 479 | // Labels reduce the size of the slider rect |
| 480 | if ( HasLabels() ) |
| 481 | { |
| 482 | wxSize sizeLabels = CalcLabelSize(); |
| 483 | |
| 484 | m_rectLabel = wxRect(rectTotal.GetPosition(), sizeLabels); |
| 485 | |
| 486 | if (style & wxSL_TOP) |
| 487 | { |
| 488 | // shrink and offset the slider to the bottom |
| 489 | m_rectSlider.y += sizeLabels.y + SLIDER_LABEL_MARGIN; |
| 490 | m_rectSlider.height -= sizeLabels.y + SLIDER_LABEL_MARGIN; |
| 491 | } |
| 492 | else if (style & wxSL_BOTTOM) |
| 493 | { |
| 494 | // shrink the slider and move the label to the bottom |
| 495 | m_rectSlider.height -= sizeLabels.y + SLIDER_LABEL_MARGIN; |
| 496 | m_rectLabel.y += m_rectSlider.height + SLIDER_LABEL_MARGIN; |
| 497 | } |
| 498 | else if (style & wxSL_LEFT) |
| 499 | { |
| 500 | // shrink and offset the slider to the right |
| 501 | m_rectSlider.x += sizeLabels.x + SLIDER_LABEL_MARGIN; |
| 502 | m_rectSlider.width -= sizeLabels.x + SLIDER_LABEL_MARGIN; |
| 503 | } |
| 504 | else if (style & wxSL_RIGHT) |
| 505 | { |
| 506 | // shrink the slider and move the label to the right |
| 507 | m_rectSlider.width -= sizeLabels.x + SLIDER_LABEL_MARGIN; |
| 508 | m_rectLabel.x += m_rectSlider.width + SLIDER_LABEL_MARGIN; |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | // calculate ticks too |
| 513 | if ( HasTicks() ) |
| 514 | { |
| 515 | wxCoord lenTick = GetRenderer()->GetSliderTickLen(); |
| 516 | |
| 517 | // it |
| 518 | m_rectTicks = GetShaftRect(); |
| 519 | |
| 520 | if ( IsVert() ) |
| 521 | { |
| 522 | if (style & (wxSL_LEFT|wxSL_BOTH)) |
| 523 | { |
| 524 | m_rectTicks.x = m_rectSlider.x; |
| 525 | } |
| 526 | else |
| 527 | { // wxSL_RIGHT |
| 528 | m_rectTicks.x = m_rectSlider.x + m_rectSlider.width - lenTick; |
| 529 | } |
| 530 | m_rectTicks.width = lenTick; |
| 531 | } |
| 532 | else // horizontal |
| 533 | { |
| 534 | if (style & (wxSL_TOP|wxSL_BOTH)) |
| 535 | { |
| 536 | m_rectTicks.y = m_rectSlider.y; |
| 537 | } |
| 538 | else |
| 539 | { // wxSL_BOTTOM |
| 540 | m_rectTicks.y = m_rectSlider.y + m_rectSlider.height - lenTick; |
| 541 | } |
| 542 | m_rectTicks.height = lenTick; |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | // slider is never smaller than thumb size unless rectTotal |
| 547 | if ( IsVert() ) |
| 548 | { |
| 549 | wxCoord width = wxMin ( rectTotal.width, sizeThumb.x ); |
| 550 | m_rectSlider.width = wxMax ( m_rectSlider.width, width ); |
| 551 | } |
| 552 | else |
| 553 | { |
| 554 | wxCoord height = wxMin ( rectTotal.height, sizeThumb.y ); |
| 555 | m_rectSlider.height = wxMax ( m_rectSlider.height, height ); |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | wxSize wxSlider::GetDefaultThumbSize() const |
| 560 | { |
| 561 | // Default size has no styles (arrows) |
| 562 | return GetRenderer()->GetSliderThumbSize(GetSliderRect(), 0, GetOrientation()); |
| 563 | } |
| 564 | |
| 565 | wxSize wxSlider::GetThumbSize() const |
| 566 | { |
| 567 | return GetRenderer()->GetSliderThumbSize(GetSliderRect(), m_thumbSize, GetOrientation()); |
| 568 | } |
| 569 | |
| 570 | // ---------------------------------------------------------------------------- |
| 571 | // wxSlider thumb geometry |
| 572 | // ---------------------------------------------------------------------------- |
| 573 | |
| 574 | wxRect wxSlider::GetShaftRect() const |
| 575 | { |
| 576 | return GetRenderer()->GetSliderShaftRect(m_rectSlider, m_thumbSize, GetOrientation(), GetWindowStyle()); |
| 577 | } |
| 578 | |
| 579 | void wxSlider::CalcThumbRect(const wxRect *rectShaftIn, |
| 580 | wxRect *rectThumbOut, |
| 581 | wxRect *rectLabelOut, |
| 582 | int value) const |
| 583 | { |
| 584 | if ( value == INVALID_THUMB_VALUE ) |
| 585 | { |
| 586 | // use the current if not specified |
| 587 | value = m_value; |
| 588 | } |
| 589 | |
| 590 | bool isVertical = IsVert(); |
| 591 | |
| 592 | wxRect rectShaft; |
| 593 | if ( rectShaftIn ) |
| 594 | { |
| 595 | rectShaft = *rectShaftIn; |
| 596 | } |
| 597 | else // no shaft rect provided, calc it |
| 598 | { |
| 599 | rectShaft = GetShaftRect(); |
| 600 | } |
| 601 | |
| 602 | wxCoord lenShaft, |
| 603 | lenThumb; |
| 604 | wxCoord *p; |
| 605 | |
| 606 | wxRect rectThumb(rectShaft.GetPosition(), GetThumbSize()); |
| 607 | if ( isVertical ) |
| 608 | { |
| 609 | rectThumb.x += (rectShaft.width - rectThumb.width) / 2; |
| 610 | |
| 611 | lenThumb = rectThumb.height; |
| 612 | lenShaft = rectShaft.height; |
| 613 | p = &rectThumb.y; |
| 614 | } |
| 615 | else // horz |
| 616 | { |
| 617 | rectThumb.y += (rectShaft.height - rectThumb.height) / 2; |
| 618 | |
| 619 | lenThumb = rectThumb.width; |
| 620 | lenShaft = rectShaft.width; |
| 621 | p = &rectThumb.x; |
| 622 | } |
| 623 | |
| 624 | // the thumb must always be entirely inside the shaft limits, so the max |
| 625 | // position is not at lenShaft but at lenShaft - thumbSize |
| 626 | if ( m_max != m_min ) |
| 627 | { |
| 628 | if ( isVertical ) |
| 629 | { |
| 630 | *p += ((lenShaft - lenThumb)*(m_max - value))/(m_max - m_min); |
| 631 | } |
| 632 | else |
| 633 | { // horz |
| 634 | *p += ((lenShaft - lenThumb)*(value - m_min))/(m_max - m_min); |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | // calc the label rect |
| 639 | if ( HasLabels() && rectLabelOut ) |
| 640 | { |
| 641 | long style = GetWindowStyle(); |
| 642 | wxRect rectLabel = m_rectLabel; |
| 643 | |
| 644 | // centre the label relatively to the thumb position |
| 645 | if (style & (wxSL_TOP|wxSL_BOTTOM)) |
| 646 | { |
| 647 | rectLabel.x = rectThumb.x + (rectThumb.width - m_rectLabel.width)/2; |
| 648 | } |
| 649 | else if (style & (wxSL_LEFT|wxSL_RIGHT)) |
| 650 | { |
| 651 | rectLabel.y = rectThumb.y + (rectThumb.height - m_rectLabel.height)/2; |
| 652 | } |
| 653 | |
| 654 | *rectLabelOut = rectLabel; |
| 655 | } |
| 656 | |
| 657 | if ( rectThumbOut ) |
| 658 | |
| 659 | *rectThumbOut = rectThumb; |
| 660 | } |
| 661 | |
| 662 | // ---------------------------------------------------------------------------- |
| 663 | // wxSlider drawing |
| 664 | // ---------------------------------------------------------------------------- |
| 665 | |
| 666 | wxString wxSlider::FormatValue(int value) const |
| 667 | { |
| 668 | return wxString::Format(_T("%d"), value); |
| 669 | } |
| 670 | |
| 671 | void wxSlider::DoDraw(wxControlRenderer *renderer) |
| 672 | { |
| 673 | wxRenderer *rend = GetRenderer(); |
| 674 | wxDC& dc = renderer->GetDC(); |
| 675 | wxRect rectUpdate = GetUpdateClientRect(); |
| 676 | |
| 677 | wxOrientation orient = GetOrientation(); |
| 678 | int flags = GetStateFlags(); |
| 679 | long style = GetWindowStyle(); |
| 680 | |
| 681 | wxSize sz = GetThumbSize(); |
| 682 | int len = IsVert() ? sz.x : sz.y; |
| 683 | |
| 684 | // first draw the shaft |
| 685 | wxRect rectShaft = rend->GetSliderShaftRect(m_rectSlider, len, orient, style); |
| 686 | if ( rectUpdate.Intersects(rectShaft) ) |
| 687 | { |
| 688 | rend->DrawSliderShaft(dc, m_rectSlider, len, orient, flags, style); |
| 689 | } |
| 690 | |
| 691 | // calculate the thumb position in pixels and draw it |
| 692 | wxRect rectThumb, rectLabel; |
| 693 | CalcThumbRect(&rectShaft, &rectThumb, &rectLabel); |
| 694 | |
| 695 | // then draw the ticks |
| 696 | if ( HasTicks() && rectUpdate.Intersects(m_rectTicks) ) |
| 697 | { |
| 698 | rend->DrawSliderTicks(dc, m_rectSlider, len, orient, |
| 699 | m_min, m_max, m_tickFreq, flags, style); |
| 700 | } |
| 701 | |
| 702 | // then draw the thumb |
| 703 | if ( rectUpdate.Intersects(rectThumb) ) |
| 704 | { |
| 705 | rend->DrawSliderThumb(dc, rectThumb, orient, flags | m_thumbFlags, style); |
| 706 | } |
| 707 | |
| 708 | // finally, draw the label near the thumb |
| 709 | if ( HasLabels() && rectUpdate.Intersects(rectLabel) ) |
| 710 | { |
| 711 | // align it to be close to the shaft |
| 712 | int align = 0; |
| 713 | if (style & wxSL_TOP) |
| 714 | { |
| 715 | align = wxALIGN_CENTRE_HORIZONTAL|wxALIGN_TOP; |
| 716 | } |
| 717 | else if (style & wxSL_BOTTOM) |
| 718 | { |
| 719 | align = wxALIGN_CENTRE_HORIZONTAL|wxALIGN_BOTTOM; |
| 720 | } |
| 721 | else if (style & wxSL_LEFT) |
| 722 | { |
| 723 | align = wxALIGN_CENTRE_VERTICAL|wxALIGN_LEFT; |
| 724 | } |
| 725 | else if (style & wxSL_RIGHT) |
| 726 | { |
| 727 | align = wxALIGN_CENTRE_VERTICAL|wxALIGN_RIGHT; |
| 728 | } |
| 729 | |
| 730 | dc.SetFont(GetFont()); |
| 731 | dc.SetTextForeground(GetForegroundColour()); |
| 732 | |
| 733 | // the slider label is never drawn focused |
| 734 | rend->DrawLabel(dc, FormatValue(m_value), rectLabel, |
| 735 | flags & ~wxCONTROL_FOCUSED, align); |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | // ---------------------------------------------------------------------------- |
| 740 | // wxSlider input processing |
| 741 | // ---------------------------------------------------------------------------- |
| 742 | |
| 743 | bool wxSlider::PerformAction(const wxControlAction& action, |
| 744 | long numArg, |
| 745 | const wxString& strArg) |
| 746 | { |
| 747 | wxEventType scrollEvent = wxEVT_NULL; |
| 748 | int value; |
| 749 | bool valueChanged = true; |
| 750 | |
| 751 | if ( action == wxACTION_SLIDER_START ) |
| 752 | { |
| 753 | scrollEvent = wxEVT_SCROLL_TOP; |
| 754 | value = m_min; |
| 755 | } |
| 756 | else if ( action == wxACTION_SLIDER_END ) |
| 757 | { |
| 758 | scrollEvent = wxEVT_SCROLL_BOTTOM; |
| 759 | value = m_max; |
| 760 | } |
| 761 | else if ( action == wxACTION_SLIDER_PAGE_CHANGE ) |
| 762 | { |
| 763 | value = NormalizeValue(m_value + numArg * GetPageSize()); |
| 764 | } |
| 765 | else if ( action == wxACTION_SLIDER_LINE_UP ) |
| 766 | { |
| 767 | scrollEvent = wxEVT_SCROLL_LINEUP; |
| 768 | value = NormalizeValue(m_value + +GetLineSize()); |
| 769 | } |
| 770 | else if ( action == wxACTION_SLIDER_LINE_DOWN ) |
| 771 | { |
| 772 | scrollEvent = wxEVT_SCROLL_LINEDOWN; |
| 773 | value = NormalizeValue(m_value + -GetLineSize()); |
| 774 | } |
| 775 | else if ( action == wxACTION_SLIDER_PAGE_UP ) |
| 776 | { |
| 777 | scrollEvent = wxEVT_SCROLL_PAGEUP; |
| 778 | value = NormalizeValue(m_value + +GetPageSize()); |
| 779 | } |
| 780 | else if ( action == wxACTION_SLIDER_PAGE_DOWN ) |
| 781 | { |
| 782 | scrollEvent = wxEVT_SCROLL_PAGEDOWN; |
| 783 | value = NormalizeValue(m_value + -GetPageSize()); |
| 784 | } |
| 785 | else if ( action == wxACTION_SLIDER_THUMB_DRAG || |
| 786 | action == wxACTION_SLIDER_THUMB_MOVE ) |
| 787 | { |
| 788 | scrollEvent = wxEVT_SCROLL_THUMBTRACK; |
| 789 | |
| 790 | // we shouldn't generate a command event about this change but we still |
| 791 | // should update our value and the slider appearance |
| 792 | valueChanged = false; |
| 793 | m_value = |
| 794 | value = (int)numArg; |
| 795 | Refresh(); |
| 796 | } |
| 797 | else if ( action == wxACTION_SLIDER_THUMB_RELEASE ) |
| 798 | { |
| 799 | scrollEvent = wxEVT_SCROLL_THUMBRELEASE; |
| 800 | value = (int)numArg; |
| 801 | } |
| 802 | else |
| 803 | { |
| 804 | return wxControl::PerformAction(action, numArg, strArg); |
| 805 | } |
| 806 | |
| 807 | // update wxSlider current value and generate wxCommandEvent, except while |
| 808 | // dragging the thumb |
| 809 | if ( valueChanged ) |
| 810 | ChangeValueTo(value); |
| 811 | |
| 812 | // also generate more precise wxScrollEvent if applicable |
| 813 | if ( scrollEvent != wxEVT_NULL ) |
| 814 | { |
| 815 | wxScrollEvent event(scrollEvent, GetId()); |
| 816 | event.SetPosition(value); |
| 817 | event.SetEventObject( this ); |
| 818 | GetEventHandler()->ProcessEvent(event); |
| 819 | } |
| 820 | |
| 821 | return true; |
| 822 | } |
| 823 | |
| 824 | // ---------------------------------------------------------------------------- |
| 825 | // wxSlider implementation of wxControlWithThumb interface |
| 826 | // ---------------------------------------------------------------------------- |
| 827 | |
| 828 | wxScrollThumb::Shaft wxSlider::HitTest(const wxPoint& pt) const |
| 829 | { |
| 830 | wxRect rectShaft = GetShaftRect(); |
| 831 | wxRect rectThumb; |
| 832 | CalcThumbRect(&rectShaft, &rectThumb, NULL); |
| 833 | |
| 834 | // check for possible shaft or thumb hit |
| 835 | if (!rectShaft.Inside(pt) && !rectThumb.Inside(pt)) |
| 836 | { |
| 837 | return wxScrollThumb::Shaft_None; |
| 838 | } |
| 839 | |
| 840 | // the position to test and the start and end of the thumb |
| 841 | wxCoord x, x1, x2, x3, x4; |
| 842 | if (IsVert()) |
| 843 | { |
| 844 | x = pt.y; |
| 845 | x1 = rectThumb.GetBottom(); |
| 846 | x2 = rectShaft.GetBottom(); |
| 847 | x3 = rectShaft.GetTop(); |
| 848 | x4 = rectThumb.GetTop(); |
| 849 | } |
| 850 | else |
| 851 | { // horz |
| 852 | x = pt.x; |
| 853 | x1 = rectShaft.GetLeft(); |
| 854 | x2 = rectThumb.GetLeft(); |
| 855 | x3 = rectThumb.GetRight(); |
| 856 | x4 = rectShaft.GetRight(); |
| 857 | } |
| 858 | if ((x1 <= x) && (x < x2)) |
| 859 | { |
| 860 | // or to the left |
| 861 | return wxScrollThumb::Shaft_Above; |
| 862 | } |
| 863 | |
| 864 | if ((x3 < x) && (x <= x4)) { |
| 865 | // or to the right |
| 866 | return wxScrollThumb::Shaft_Below; |
| 867 | } |
| 868 | |
| 869 | // where else can it be? |
| 870 | return wxScrollThumb::Shaft_Thumb; |
| 871 | } |
| 872 | |
| 873 | wxCoord wxSlider::ThumbPosToPixel() const |
| 874 | { |
| 875 | wxRect rectThumb; |
| 876 | CalcThumbRect(NULL, &rectThumb, NULL); |
| 877 | |
| 878 | return IsVert() ? rectThumb.y : rectThumb.x; |
| 879 | } |
| 880 | |
| 881 | int wxSlider::PixelToThumbPos(wxCoord x) const |
| 882 | { |
| 883 | wxRect rectShaft = GetShaftRect(); |
| 884 | wxSize sizeThumb = GetThumbSize(); |
| 885 | |
| 886 | wxCoord x0, len; |
| 887 | if ( IsVert() ) |
| 888 | { |
| 889 | x0 = rectShaft.y; |
| 890 | len = rectShaft.height - sizeThumb.y; |
| 891 | } |
| 892 | else // horz |
| 893 | { |
| 894 | x0 = rectShaft.x; |
| 895 | len = rectShaft.width - sizeThumb.x; |
| 896 | } |
| 897 | |
| 898 | int pos = m_min; |
| 899 | if ( len > 0 ) |
| 900 | { |
| 901 | if ( x > x0 ) |
| 902 | { |
| 903 | pos += ((x - x0) * (m_max - m_min)) / len; |
| 904 | if ( pos > m_max ) |
| 905 | pos = m_max; |
| 906 | } |
| 907 | //else: x <= x0, leave pos = min |
| 908 | } |
| 909 | |
| 910 | return pos; |
| 911 | } |
| 912 | |
| 913 | void wxSlider::SetShaftPartState(wxScrollThumb::Shaft shaftPart, |
| 914 | int flag, |
| 915 | bool set) |
| 916 | { |
| 917 | // for now we ignore the flags for the shaft as no renderer uses them |
| 918 | // anyhow |
| 919 | if ( shaftPart == wxScrollThumb::Shaft_Thumb ) |
| 920 | { |
| 921 | if ( set ) |
| 922 | m_thumbFlags |= flag; |
| 923 | else |
| 924 | m_thumbFlags &= ~flag; |
| 925 | |
| 926 | Refresh(); |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | void wxSlider::OnThumbDragStart(int pos) |
| 931 | { |
| 932 | if (IsVert()) |
| 933 | { |
| 934 | PerformAction(wxACTION_SLIDER_THUMB_DRAG, m_max - pos); |
| 935 | } |
| 936 | else |
| 937 | { |
| 938 | PerformAction(wxACTION_SLIDER_THUMB_DRAG, pos); |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | void wxSlider::OnThumbDrag(int pos) |
| 943 | { |
| 944 | if (IsVert()) |
| 945 | { |
| 946 | PerformAction(wxACTION_SLIDER_THUMB_MOVE, m_max - pos); |
| 947 | } |
| 948 | else |
| 949 | { |
| 950 | PerformAction(wxACTION_SLIDER_THUMB_MOVE, pos); |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | void wxSlider::OnThumbDragEnd(int pos) |
| 955 | { |
| 956 | if (IsVert()) |
| 957 | { |
| 958 | PerformAction(wxACTION_SLIDER_THUMB_RELEASE, m_max - pos); |
| 959 | } |
| 960 | else |
| 961 | { |
| 962 | PerformAction(wxACTION_SLIDER_THUMB_RELEASE, pos); |
| 963 | } |
| 964 | } |
| 965 | |
| 966 | void wxSlider::OnPageScrollStart() |
| 967 | { |
| 968 | // we do nothing here |
| 969 | } |
| 970 | |
| 971 | bool wxSlider::OnPageScroll(int pageInc) |
| 972 | { |
| 973 | int value = GetValue(); |
| 974 | PerformAction(wxACTION_SLIDER_PAGE_CHANGE, pageInc); |
| 975 | |
| 976 | return GetValue() != value; |
| 977 | } |
| 978 | |
| 979 | // ---------------------------------------------------------------------------- |
| 980 | // wxStdSliderButtonInputHandler |
| 981 | // ---------------------------------------------------------------------------- |
| 982 | |
| 983 | bool wxStdSliderButtonInputHandler::HandleKey(wxInputConsumer *consumer, |
| 984 | const wxKeyEvent& event, |
| 985 | bool pressed) |
| 986 | { |
| 987 | if ( pressed ) |
| 988 | { |
| 989 | int keycode = event.GetKeyCode(); |
| 990 | |
| 991 | wxControlAction action; |
| 992 | switch ( keycode ) |
| 993 | { |
| 994 | case WXK_HOME: |
| 995 | action = wxACTION_SLIDER_END; |
| 996 | break; |
| 997 | |
| 998 | case WXK_END: |
| 999 | action = wxACTION_SLIDER_START; |
| 1000 | break; |
| 1001 | |
| 1002 | case WXK_RIGHT: |
| 1003 | case WXK_UP: |
| 1004 | action = wxACTION_SLIDER_LINE_UP; |
| 1005 | break; |
| 1006 | |
| 1007 | case WXK_LEFT: |
| 1008 | case WXK_DOWN: |
| 1009 | action = wxACTION_SLIDER_LINE_DOWN; |
| 1010 | break; |
| 1011 | |
| 1012 | case WXK_PAGEUP: |
| 1013 | action = wxACTION_SLIDER_PAGE_UP; |
| 1014 | break; |
| 1015 | |
| 1016 | case WXK_PAGEDOWN: |
| 1017 | action = wxACTION_SLIDER_PAGE_DOWN; |
| 1018 | break; |
| 1019 | } |
| 1020 | |
| 1021 | if ( !action.IsEmpty() ) |
| 1022 | { |
| 1023 | consumer->PerformAction(action); |
| 1024 | |
| 1025 | return true; |
| 1026 | } |
| 1027 | } |
| 1028 | |
| 1029 | return wxStdInputHandler::HandleKey(consumer, event, pressed); |
| 1030 | } |
| 1031 | |
| 1032 | bool wxStdSliderButtonInputHandler::HandleMouse(wxInputConsumer *consumer, |
| 1033 | const wxMouseEvent& event) |
| 1034 | { |
| 1035 | wxSlider *slider = wxStaticCast(consumer->GetInputWindow(), wxSlider); |
| 1036 | |
| 1037 | if ( slider->GetThumb().HandleMouse(event) ) |
| 1038 | { |
| 1039 | // processed by the thumb |
| 1040 | return false; |
| 1041 | } |
| 1042 | |
| 1043 | return wxStdInputHandler::HandleMouse(consumer, event); |
| 1044 | } |
| 1045 | |
| 1046 | bool wxStdSliderButtonInputHandler::HandleMouseMove(wxInputConsumer *consumer, |
| 1047 | const wxMouseEvent& event) |
| 1048 | { |
| 1049 | wxSlider *slider = wxStaticCast(consumer->GetInputWindow(), wxSlider); |
| 1050 | |
| 1051 | if ( slider->GetThumb().HandleMouseMove(event) ) |
| 1052 | { |
| 1053 | // processed by the thumb |
| 1054 | return false; |
| 1055 | } |
| 1056 | |
| 1057 | return wxStdInputHandler::HandleMouseMove(consumer, event); |
| 1058 | } |
| 1059 | |
| 1060 | bool |
| 1061 | wxStdSliderButtonInputHandler::HandleFocus(wxInputConsumer * WXUNUSED(consumer), |
| 1062 | const wxFocusEvent& WXUNUSED(event)) |
| 1063 | { |
| 1064 | // slider's appearance changes when it gets/loses focus |
| 1065 | return true; |
| 1066 | } |
| 1067 | |
| 1068 | #endif // wxUSE_SLIDER |