src/univ/slider.cpp

   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