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