src/univ/slider.cpp

   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