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     // check if the value is going to change at all
 187     if (value == m_value) return FALSE;
 188
 189     // this method is protected and we should only call it with normalized
 190     // value!
 191     wxCHECK_MSG( IsInRange(value), FALSE, _T("invalid slider value") );
 192
 193     m_value = value;
 194
 195     Refresh();
 196
 197     // generate the event
 198     wxCommandEvent event(wxEVT_COMMAND_SLIDER_UPDATED, GetId());
 199     event.SetInt(m_value);
 200     event.SetEventObject(this);
 201
 202     (void)GetEventHandler()->ProcessEvent(event);
 203
 204     return TRUE;
 205 }
 206
 207 void wxSlider::SetValue(int value)
 208 {
 209     value = NormalizeValue(value);
 210
 211     if ( m_value != value )
 212     {
 213         m_value = value;
 214
 215         Refresh();
 216     }
 217 }
 218
 219 void wxSlider::SetRange(int minValue, int maxValue)
 220 {
 221     if ( minValue > maxValue )
 222     {
 223         // swap them, we always want min to be less than max
 224         int tmp = minValue;
 225         minValue = maxValue;
 226         maxValue = tmp;
 227     }
 228
 229     if ( m_min != minValue || m_max != maxValue )
 230     {
 231         m_min = minValue;
 232         m_max = maxValue;
 233
 234         // reset the value to make sure it is in the new range
 235         SetValue(m_value);
 236
 237         // the size of the label rect might have changed
 238         if ( HasLabels() )
 239         {
 240             CalcGeometry();
 241         }
 242
 243         Refresh();
 244     }
 245     //else: nothing changed
 246 }
 247
 248 int wxSlider::GetMin() const
 249 {
 250     return m_min;
 251 }
 252
 253 int wxSlider::GetMax() const
 254 {
 255     return m_max;
 256 }
 257
 258 // ----------------------------------------------------------------------------
 259 // wxSlider line/page/thumb size
 260 // ----------------------------------------------------------------------------
 261
 262 void wxSlider::SetLineSize(int lineSize)
 263 {
 264     wxCHECK_RET( lineSize >= 0, _T("invalid slider line size") );
 265
 266     m_lineSize = lineSize;
 267 }
 268
 269 void wxSlider::SetPageSize(int pageSize)
 270 {
 271     wxCHECK_RET( pageSize >= 0, _T("invalid slider page size") );
 272
 273     m_pageSize = pageSize;
 274 }
 275
 276 int wxSlider::GetLineSize() const
 277 {
 278     if ( !m_lineSize )
 279     {
 280         // the default line increment is 1
 281         wxConstCast(this, wxSlider)->m_lineSize = 1;
 282     }
 283
 284     return m_lineSize;
 285 }
 286
 287 int wxSlider::GetPageSize() const
 288 {
 289     if ( !m_pageSize )
 290     {
 291         // the default page increment is m_tickFreq
 292         wxConstCast(this, wxSlider)->m_pageSize = m_tickFreq;
 293     }
 294
 295     return m_pageSize;
 296 }
 297
 298 void wxSlider::SetThumbLength(int lenPixels)
 299 {
 300     wxCHECK_RET( lenPixels >= 0, _T("invalid slider thumb size") );
 301
 302     // use m_thumbSize here directly and not GetThumbLength() to avoid setting
 303     // it to the default value as we don't need it
 304     if ( lenPixels != m_thumbSize )
 305     {
 306         m_thumbSize = lenPixels;
 307
 308         Refresh();
 309     }
 310 }
 311
 312 int wxSlider::GetThumbLength() const
 313 {
 314     wxSize sz = GetDefaultThumbSize();
 315     int len = (IsVert() ? sz.x : sz.y);
 316     if (m_thumbSize > len)
 317     {
 318         return m_thumbSize;
 319     }
 320     else
 321     {
 322         return len;
 323     }
 324
 325 }
 326
 327 // ----------------------------------------------------------------------------
 328 // wxSlider ticks
 329 // ----------------------------------------------------------------------------
 330
 331 void wxSlider::SetTickFreq(int n, int WXUNUSED(dummy))
 332 {
 333     wxCHECK_RET (n > 0, _T("invalid slider tick frequency"));
 334
 335     if ( n != m_tickFreq )
 336     {
 337         m_tickFreq = n;
 338
 339         Refresh();
 340     }
 341 }
 342
 343 // ----------------------------------------------------------------------------
 344 // wxSlider geometry
 345 // ----------------------------------------------------------------------------
 346
 347 wxSize wxSlider::CalcLabelSize() const
 348 {
 349     wxSize size;
 350
 351     // there is no sense in trying to calc the labels size if we haven't got
 352     // any, the caller must check for it
 353     wxCHECK_MSG( HasLabels(), size, _T("shouldn't be called") );
 354
 355     wxCoord w1, h1, w2, h2;
 356     GetTextExtent(FormatValue(m_min), &w1, &h1);
 357     GetTextExtent(FormatValue(m_max), &w2, &h2);
 358
 359     size.x = wxMax(w1, w2);
 360     size.y = wxMax(h1, h2);
 361
 362     return size;
 363 }
 364
 365 wxSize wxSlider::DoGetBestClientSize() const
 366 {
 367     // this dimension is completely arbitrary
 368     static const wxCoord SLIDER_WIDTH = 40;
 369
 370     long style = GetWindowStyle();
 371
 372     // first calculate the size of the slider itself: i.e. the shaft and the
 373     // thumb
 374     wxCoord height = GetRenderer()->GetSliderDim();
 375
 376     wxSize size;
 377     if ( IsVert() )
 378     {
 379         size.x = height;
 380         size.y = SLIDER_WIDTH;
 381     }
 382     else // horizontal
 383     {
 384         size.x = SLIDER_WIDTH;
 385         size.y = height;
 386     }
 387
 388     // add space for ticks
 389     if ( HasTicks() )
 390     {
 391         wxCoord lenTick = GetRenderer()->GetSliderTickLen();
 392         if (style & wxSL_BOTH)
 393         {
 394             lenTick = 2 * lenTick;
 395         }
 396
 397         if ( IsVert() )
 398             size.x += lenTick;
 399         else
 400             size.y += lenTick;
 401     }
 402
 403     // if we have the label, reserve enough space for it
 404     if ( HasLabels() )
 405     {
 406         wxSize sizeLabels = CalcLabelSize();
 407
 408         if (style & (wxSL_LEFT|wxSL_RIGHT))
 409         {
 410             size.x += sizeLabels.x + SLIDER_LABEL_MARGIN;
 411         }
 412         else if (style & (wxSL_TOP|wxSL_BOTTOM))
 413         {
 414             size.y += sizeLabels.y + SLIDER_LABEL_MARGIN;
 415         }
 416     }
 417
 418     return size;
 419 }
 420
 421 void wxSlider::OnSize(wxSizeEvent& event)
 422 {
 423     CalcGeometry();
 424
 425     event.Skip();
 426 }
 427
 428 const wxRect& wxSlider::GetSliderRect() const
 429 {
 430     if ( m_rectSlider.width < 0 )
 431     {
 432         wxConstCast(this, wxSlider)->CalcGeometry();
 433     }
 434
 435     return m_rectSlider;
 436 }
 437
 438 void wxSlider::CalcGeometry()
 439 {
 440     /*
 441        recalc the label and slider positions, this looks like this for
 442        wxSL_HORIZONTAL | wxSL_TOP slider:
 443
 444        LLL             lll
 445        -------------------------
 446        |                T      |  <-- this is the slider rect
 447        | HHHHHHHHHHHHHHHTHHHHH |
 448        |                T      |
 449        | *  *  *  *  *  *  *  *|
 450        -------------------------
 451
 452        LLL is m_rectLabel as calculated here and lll is the real rect used for
 453        label drawing in OnDraw() (TTT indicated the thumb position and *s are
 454        the ticks)
 455
 456        in the wxSL_VERTICAL | wxSL_RIGHT case the picture is like this:
 457
 458        ------ LLL
 459        | H  |
 460        | H *|
 461        | H  |
 462        | H *|
 463        | H  |
 464        | H *|
 465        | H  |
 466        |TTT*| lll
 467        | H  |
 468        | H *|
 469        ------
 470     */
 471     long style = GetWindowStyle();
 472
 473     // initialize to the full client rect
 474     wxRect rectTotal = GetClientRect();
 475     m_rectSlider = rectTotal;
 476     wxSize sizeThumb = GetThumbSize();
 477
 478     // Labels reduce the size of the slider rect
 479     if ( HasLabels() )
 480     {
 481        wxSize sizeLabels = CalcLabelSize();
 482
 483         m_rectLabel = wxRect(rectTotal.GetPosition(), sizeLabels);
 484
 485         if (style & wxSL_TOP)
 486         {
 487             // shrink and offset the slider to the bottom
 488             m_rectSlider.y += sizeLabels.y + SLIDER_LABEL_MARGIN;
 489             m_rectSlider.height -= sizeLabels.y + SLIDER_LABEL_MARGIN;
 490         }
 491         else if (style & wxSL_BOTTOM)
 492         {
 493             // shrink the slider and move the label to the bottom
 494             m_rectSlider.height -= sizeLabels.y + SLIDER_LABEL_MARGIN;
 495             m_rectLabel.y += m_rectSlider.height + SLIDER_LABEL_MARGIN;
 496         }
 497         else if (style & wxSL_LEFT)
 498         {
 499             // shrink and offset the slider to the right
 500             m_rectSlider.x += sizeLabels.x + SLIDER_LABEL_MARGIN;
 501             m_rectSlider.width -= sizeLabels.x + SLIDER_LABEL_MARGIN;
 502         }
 503         else if (style & wxSL_RIGHT)
 504         {
 505             // shrink the slider and move the label to the right
 506             m_rectSlider.width -= sizeLabels.x + SLIDER_LABEL_MARGIN;
 507             m_rectLabel.x += m_rectSlider.width + SLIDER_LABEL_MARGIN;
 508         }
 509     }
 510
 511     // calculate ticks too
 512     if ( HasTicks() )
 513     {
 514         wxCoord lenTick = GetRenderer()->GetSliderTickLen();
 515
 516         // it
 517         m_rectTicks = GetShaftRect();
 518
 519         if ( IsVert() )
 520         {
 521             if (style & (wxSL_LEFT|wxSL_BOTH))
 522             {
 523                 m_rectTicks.x = m_rectSlider.x;
 524             }
 525             else
 526             { // wxSL_RIGHT
 527                 m_rectTicks.x = m_rectSlider.x + m_rectSlider.width - lenTick;
 528             }
 529             m_rectTicks.width = lenTick;
 530         }
 531         else // horizontal
 532         {
 533             if (style & (wxSL_TOP|wxSL_BOTH))
 534             {
 535                 m_rectTicks.y = m_rectSlider.y;
 536             }
 537             else
 538             { // wxSL_BOTTOM
 539                 m_rectTicks.y = m_rectSlider.y + m_rectSlider.height - lenTick;
 540             }
 541             m_rectTicks.height = lenTick;
 542         }
 543     }
 544
 545     // slider is never smaller than thumb size unless rectTotal
 546     if ( IsVert() )
 547     {
 548         wxCoord width = wxMin ( rectTotal.width, sizeThumb.x );
 549         m_rectSlider.width = wxMax ( m_rectSlider.width, width );
 550     }
 551     else
 552     {
 553         wxCoord height = wxMin ( rectTotal.height, sizeThumb.y );
 554         m_rectSlider.height = wxMax ( m_rectSlider.height, height );
 555     }
 556 }
 557
 558 wxSize wxSlider::GetDefaultThumbSize() const
 559 {
 560     // Default size has no styles (arrows)
 561     return GetRenderer()->GetSliderThumbSize(GetSliderRect(), 0, GetOrientation());
 562 }
 563
 564 wxSize wxSlider::GetThumbSize() const
 565 {
 566     return GetRenderer()->GetSliderThumbSize(GetSliderRect(), m_thumbSize, GetOrientation());
 567 }
 568
 569 // ----------------------------------------------------------------------------
 570 // wxSlider thumb geometry
 571 // ----------------------------------------------------------------------------
 572
 573 wxRect wxSlider::GetShaftRect() const
 574 {
 575     return GetRenderer()->GetSliderShaftRect(m_rectSlider, m_thumbSize, GetOrientation(), GetWindowStyle());
 576 }
 577
 578 void wxSlider::CalcThumbRect(const wxRect *rectShaftIn,
 579                              wxRect *rectThumbOut,
 580                              wxRect *rectLabelOut,
 581                              int value) const
 582 {
 583     if ( value == INVALID_THUMB_VALUE )
 584     {
 585         // use the current if not specified
 586         value = m_value;
 587     }
 588
 589     bool isVertical = IsVert();
 590
 591     wxRect rectShaft;
 592     if ( rectShaftIn )
 593     {
 594         rectShaft = *rectShaftIn;
 595     }
 596     else // no shaft rect provided, calc it
 597     {
 598         rectShaft = GetShaftRect();
 599     }
 600
 601     wxCoord lenShaft,
 602             lenThumb,
 603            *p;
 604     wxRect rectThumb(rectShaft.GetPosition(), GetThumbSize());
 605     if ( isVertical )
 606     {
 607         rectThumb.x += (rectShaft.width - rectThumb.width) / 2;
 608
 609         lenThumb = rectThumb.height;
 610         lenShaft = rectShaft.height;
 611         p = &rectThumb.y;
 612     }
 613     else // horz
 614     {
 615         rectThumb.y += (rectShaft.height - rectThumb.height) / 2;
 616
 617         lenThumb = rectThumb.width;
 618         lenShaft = rectShaft.width;
 619         p = &rectThumb.x;
 620     }
 621
 622     // the thumb must always be entirely inside the shaft limits, so the max
 623     // position is not at lenShaft but at lenShaft - thumbSize
 624     if ( m_max != m_min )
 625     {
 626         if ( isVertical )
 627         {
 628             *p += ((lenShaft - lenThumb)*(m_max - value))/(m_max - m_min);
 629         }
 630         else
 631         { // horz
 632             *p += ((lenShaft - lenThumb)*(value - m_min))/(m_max - m_min);
 633         }
 634     }
 635
 636     // calc the label rect
 637     if ( HasLabels() && rectLabelOut )
 638     {
 639         long style = GetWindowStyle();
 640         wxRect rectLabel = m_rectLabel;
 641
 642         // centre the label relatively to the thumb position
 643         if (style & (wxSL_TOP|wxSL_BOTTOM))
 644         {
 645             rectLabel.x = rectThumb.x + (rectThumb.width - m_rectLabel.width)/2;
 646         }
 647         else if (style & (wxSL_LEFT|wxSL_RIGHT))
 648         {
 649             rectLabel.y = rectThumb.y + (rectThumb.height - m_rectLabel.height)/2;
 650         }
 651
 652         *rectLabelOut = rectLabel;
 653     }
 654
 655     if ( rectThumbOut )
 656
 657         *rectThumbOut = rectThumb;
 658 }
 659
 660 // ----------------------------------------------------------------------------
 661 // wxSlider drawing
 662 // ----------------------------------------------------------------------------
 663
 664 wxString wxSlider::FormatValue(int value) const
 665 {
 666     return wxString::Format(_T("%d"), value);
 667 }
 668
 669 void wxSlider::DoDraw(wxControlRenderer *renderer)
 670 {
 671     wxRenderer *rend = GetRenderer();
 672     wxDC& dc = renderer->GetDC();
 673     wxRect rectUpdate = GetUpdateClientRect();
 674
 675     wxOrientation orient = GetOrientation();
 676     int flags = GetStateFlags();
 677     long style = GetWindowStyle();
 678
 679     wxSize sz = GetThumbSize();
 680     int len = IsVert() ? sz.x : sz.y;
 681
 682     // first draw the shaft
 683     wxRect rectShaft = rend->GetSliderShaftRect(m_rectSlider, len, orient, style);
 684     if ( rectUpdate.Intersects(rectShaft) )
 685     {
 686         rend->DrawSliderShaft(dc, m_rectSlider, len, orient, flags, style);
 687     }
 688
 689     // calculate the thumb position in pixels and draw it
 690     wxRect rectThumb, rectLabel;
 691     CalcThumbRect(&rectShaft, &rectThumb, &rectLabel);
 692
 693     // then draw the ticks
 694     if ( HasTicks() && rectUpdate.Intersects(m_rectTicks) )
 695     {
 696         rend->DrawSliderTicks(dc, m_rectSlider, len, orient,
 697                               m_min, m_max, m_tickFreq, flags, style);
 698     }
 699
 700     // then draw the thumb
 701     if ( rectUpdate.Intersects(rectThumb) )
 702     {
 703         rend->DrawSliderThumb(dc, rectThumb, orient, flags | m_thumbFlags, style);
 704     }
 705
 706     // finally, draw the label near the thumb
 707     if ( HasLabels() && rectUpdate.Intersects(rectLabel) )
 708     {
 709         // align it to be close to the shaft
 710         int align = 0;
 711         if (style & wxSL_TOP)
 712         {
 713             align = wxALIGN_CENTRE_HORIZONTAL|wxALIGN_TOP;
 714         }
 715         else if (style & wxSL_BOTTOM)
 716         {
 717             align = wxALIGN_CENTRE_HORIZONTAL|wxALIGN_BOTTOM;
 718         }
 719         else if (style & wxSL_LEFT)
 720         {
 721             align = wxALIGN_CENTRE_VERTICAL|wxALIGN_LEFT;
 722         }
 723         else if (style & wxSL_RIGHT)
 724         {
 725             align = wxALIGN_CENTRE_VERTICAL|wxALIGN_RIGHT;
 726         }
 727
 728         dc.SetFont(GetFont());
 729         dc.SetTextForeground(GetForegroundColour());
 730
 731         // the slider label is never drawn focused
 732         rend->DrawLabel(dc, FormatValue(m_value), rectLabel,
 733                         flags & ~wxCONTROL_FOCUSED, align);
 734     }
 735 }
 736
 737 // ----------------------------------------------------------------------------
 738 // wxSlider input processing
 739 // ----------------------------------------------------------------------------
 740
 741 bool wxSlider::PerformAction(const wxControlAction& action,
 742                              long numArg,
 743                              const wxString& strArg)
 744 {
 745      if ( action == wxACTION_SLIDER_START )
 746     {
 747         ChangeValueTo(m_min);
 748     }
 749     else if ( action == wxACTION_SLIDER_END )
 750     {
 751         ChangeValueTo(m_max);
 752     }
 753     else if ( action == wxACTION_SLIDER_PAGE_CHANGE )
 754     {
 755         ChangeValueBy(numArg * GetPageSize());
 756     }
 757     else if ( action == wxACTION_SLIDER_LINE_UP )
 758     {
 759         ChangeValueBy(+GetLineSize());
 760     }
 761     else if ( action == wxACTION_SLIDER_LINE_DOWN )
 762     {
 763         ChangeValueBy(-GetLineSize());
 764     }
 765     else if ( action == wxACTION_SLIDER_PAGE_UP )
 766     {
 767         ChangeValueBy(+GetPageSize());
 768     }
 769     else if ( action == wxACTION_SLIDER_PAGE_DOWN )
 770     {
 771         ChangeValueBy(-GetPageSize());
 772     }
 773     else if ( action == wxACTION_SLIDER_THUMB_DRAG )
 774     {
 775         // no special processing for it
 776         return TRUE;
 777     }
 778     else if ( action == wxACTION_SLIDER_THUMB_MOVE ||
 779               action == wxACTION_SLIDER_THUMB_RELEASE )
 780     {
 781         ChangeValueTo((int)numArg);
 782     }
 783     else
 784     {
 785         return wxControl::PerformAction(action, numArg, strArg);
 786     }
 787
 788     return TRUE;
 789 }
 790
 791 // ----------------------------------------------------------------------------
 792 // wxSlider implementation of wxControlWithThumb interface
 793 // ----------------------------------------------------------------------------
 794
 795 wxScrollThumb::Shaft wxSlider::HitTest(const wxPoint& pt) const
 796 {
 797     wxRect rectShaft = GetShaftRect();
 798     wxRect rectThumb;
 799     CalcThumbRect(&rectShaft, &rectThumb, NULL);
 800
 801     // check for possible shaft or thumb hit
 802     if (!rectShaft.Inside(pt) && !rectThumb.Inside(pt))
 803     {
 804         return wxScrollThumb::Shaft_None;
 805     }
 806
 807     // the position to test and the start and end of the thumb
 808     wxCoord x, x1, x2, x3, x4;
 809     if (IsVert())
 810     {
 811         x = pt.y;
 812         x1 = rectThumb.GetBottom();
 813         x2 = rectShaft.GetBottom();
 814         x3 = rectShaft.GetTop();
 815         x4 = rectThumb.GetTop();
 816     }
 817     else
 818     { // horz
 819         x = pt.x;
 820         x1 = rectShaft.GetLeft();
 821         x2 = rectThumb.GetLeft();
 822         x3 = rectThumb.GetRight();
 823         x4 = rectShaft.GetRight();
 824     }
 825     if ((x1 <= x) & (x < x2))
 826     {
 827         // or to the left
 828         return wxScrollThumb::Shaft_Above;
 829     }
 830
 831     if ((x3 < x) & (x <= x4)) {
 832         // or to the right
 833         return wxScrollThumb::Shaft_Below;
 834     }
 835
 836     // where else can it be?
 837     return wxScrollThumb::Shaft_Thumb;
 838 }
 839
 840 wxCoord wxSlider::ThumbPosToPixel() const
 841 {
 842     wxRect rectThumb;
 843     CalcThumbRect(NULL, &rectThumb, NULL);
 844
 845     return IsVert() ? rectThumb.y : rectThumb.x;
 846 }
 847
 848 int wxSlider::PixelToThumbPos(wxCoord x) const
 849 {
 850     wxRect rectShaft = GetShaftRect();
 851     wxSize sizeThumb = GetThumbSize();
 852
 853     wxCoord x0, len;
 854     if ( IsVert() )
 855     {
 856         x0 = rectShaft.y;
 857         len = rectShaft.height - sizeThumb.y;
 858     }
 859     else // horz
 860     {
 861         x0 = rectShaft.x;
 862         len = rectShaft.width - sizeThumb.x;
 863     }
 864
 865     int pos = m_min;
 866     if ( len > 0 )
 867     {
 868         if ( x > x0 )
 869         {
 870             pos += ((x - x0) * (m_max - m_min)) / len;
 871             if ( pos > m_max )
 872                 pos = m_max;
 873         }
 874         //else: x <= x0, leave pos = min
 875     }
 876
 877     return pos;
 878 }
 879
 880 void wxSlider::SetShaftPartState(wxScrollThumb::Shaft shaftPart,
 881                                  int flag,
 882                                  bool set)
 883 {
 884     // for now we ignore the flags for the shaft as no renderer uses them
 885     // anyhow
 886     if ( shaftPart == wxScrollThumb::Shaft_Thumb )
 887     {
 888         if ( set )
 889             m_thumbFlags |= flag;
 890         else
 891             m_thumbFlags &= ~flag;
 892
 893         Refresh();
 894     }
 895 }
 896
 897 void wxSlider::OnThumbDragStart(int pos)
 898 {
 899     if (IsVert())
 900     {
 901         PerformAction(wxACTION_SLIDER_THUMB_DRAG, m_max - pos);
 902     }
 903     else
 904     {
 905         PerformAction(wxACTION_SLIDER_THUMB_DRAG, pos);
 906     }
 907 }
 908
 909 void wxSlider::OnThumbDrag(int pos)
 910 {
 911     if (IsVert())
 912     {
 913         PerformAction(wxACTION_SLIDER_THUMB_MOVE, m_max - pos);
 914     }
 915     else
 916     {
 917         PerformAction(wxACTION_SLIDER_THUMB_MOVE, pos);
 918     }
 919 }
 920
 921 void wxSlider::OnThumbDragEnd(int pos)
 922 {
 923     if (IsVert())
 924     {
 925         PerformAction(wxACTION_SLIDER_THUMB_RELEASE, m_max - pos);
 926     }
 927     else
 928     {
 929         PerformAction(wxACTION_SLIDER_THUMB_RELEASE, pos);
 930     }
 931 }
 932
 933 void wxSlider::OnPageScrollStart()
 934 {
 935     // we do nothing here
 936 }
 937
 938 bool wxSlider::OnPageScroll(int pageInc)
 939 {
 940     int value = GetValue();
 941     PerformAction(wxACTION_SLIDER_PAGE_CHANGE, pageInc);
 942
 943     return GetValue() != value;
 944 }
 945
 946 // ----------------------------------------------------------------------------
 947 // wxStdSliderButtonInputHandler
 948 // ----------------------------------------------------------------------------
 949
 950 bool wxStdSliderButtonInputHandler::HandleKey(wxInputConsumer *consumer,
 951                                               const wxKeyEvent& event,
 952                                               bool pressed)
 953 {
 954    if ( pressed )
 955     {
 956         int keycode = event.GetKeyCode();
 957
 958         wxControlAction action;
 959         switch ( keycode )
 960         {
 961             case WXK_HOME:
 962                 action = wxACTION_SLIDER_END;
 963                 break;
 964
 965             case WXK_END:
 966                 action = wxACTION_SLIDER_START;
 967                 break;
 968
 969             case WXK_RIGHT:
 970             case WXK_UP:
 971                 action = wxACTION_SLIDER_LINE_UP;
 972                 break;
 973
 974             case WXK_LEFT:
 975             case WXK_DOWN:
 976                 action = wxACTION_SLIDER_LINE_DOWN;
 977                 break;
 978
 979             case WXK_PRIOR:
 980             case WXK_PAGEUP:
 981                 action = wxACTION_SLIDER_PAGE_UP;
 982                 break;
 983
 984             case WXK_NEXT:
 985             case WXK_PAGEDOWN:
 986                 action = wxACTION_SLIDER_PAGE_DOWN;
 987                 break;
 988         }
 989
 990         if ( !!action )
 991         {
 992             consumer->PerformAction(action);
 993
 994             return TRUE;
 995         }
 996     }
 997
 998     return wxStdInputHandler::HandleKey(consumer, event, pressed);
 999 }
1000
1001 bool wxStdSliderButtonInputHandler::HandleMouse(wxInputConsumer *consumer,
1002                                                 const wxMouseEvent& event)
1003 {
1004     wxSlider *slider = wxStaticCast(consumer->GetInputWindow(), wxSlider);
1005
1006     if ( slider->GetThumb().HandleMouse(event) )
1007     {
1008         // processed by the thumb
1009         return FALSE;
1010     }
1011
1012     return wxStdInputHandler::HandleMouse(consumer, event);
1013 }
1014
1015 bool wxStdSliderButtonInputHandler::HandleMouseMove(wxInputConsumer *consumer,
1016                                                     const wxMouseEvent& event)
1017 {
1018     wxSlider *slider = wxStaticCast(consumer->GetInputWindow(), wxSlider);
1019
1020     if ( slider->GetThumb().HandleMouseMove(event) )
1021     {
1022         // processed by the thumb
1023         return FALSE;
1024     }
1025
1026     return wxStdInputHandler::HandleMouseMove(consumer, event);
1027 }
1028
1029 bool wxStdSliderButtonInputHandler::HandleFocus(wxInputConsumer *consumer,
1030                                                 const wxFocusEvent& event)
1031 {
1032     // slider's appearance changes when it gets/loses focus
1033     return TRUE;
1034 }
1035
1036 #endif // wxUSE_SLIDER