src/msw/slider95.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/slider.cpp
   3 // Purpose:     wxSlider, using the Win95 (and later) trackbar control
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart 1998
   9 //                  Vadim Zeitlin 2004
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // headers
  19 // ----------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #if wxUSE_SLIDER
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/brush.h"
  32 #endif
  33
  34 #include "wx/slider.h"
  35 #include "wx/msw/subwin.h"
  36
  37 #if !(defined(__GNUWIN32_OLD__) && !defined(__CYGWIN10__))
  38     #include <commctrl.h>
  39 #endif
  40
  41 // ----------------------------------------------------------------------------
  42 // constants
  43 // ----------------------------------------------------------------------------
  44
  45 // indices of labels in wxSlider::m_labels
  46 enum
  47 {
  48     SliderLabel_Min,
  49     SliderLabel_Max,
  50     SliderLabel_Value,
  51     SliderLabel_Last
  52 };
  53
  54 // the gap between the slider and the labels, in pixels
  55 static const int HGAP = 5;
  56
  57 // ----------------------------------------------------------------------------
  58 // XTI
  59 // ----------------------------------------------------------------------------
  60
  61 #if wxUSE_EXTENDED_RTTI
  62 WX_DEFINE_FLAGS( wxSliderStyle )
  63
  64 wxBEGIN_FLAGS( wxSliderStyle )
  65     // new style border flags, we put them first to
  66     // use them for streaming out
  67     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  68     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  69     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  70     wxFLAGS_MEMBER(wxBORDER_RAISED)
  71     wxFLAGS_MEMBER(wxBORDER_STATIC)
  72     wxFLAGS_MEMBER(wxBORDER_NONE)
  73
  74     // old style border flags
  75     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  76     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  77     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  78     wxFLAGS_MEMBER(wxRAISED_BORDER)
  79     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  80     wxFLAGS_MEMBER(wxBORDER)
  81
  82     // standard window styles
  83     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  84     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  85     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  86     wxFLAGS_MEMBER(wxWANTS_CHARS)
  87     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  88     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  89     wxFLAGS_MEMBER(wxVSCROLL)
  90     wxFLAGS_MEMBER(wxHSCROLL)
  91
  92     wxFLAGS_MEMBER(wxSL_HORIZONTAL)
  93     wxFLAGS_MEMBER(wxSL_VERTICAL)
  94     wxFLAGS_MEMBER(wxSL_AUTOTICKS)
  95     wxFLAGS_MEMBER(wxSL_LABELS)
  96     wxFLAGS_MEMBER(wxSL_LEFT)
  97     wxFLAGS_MEMBER(wxSL_TOP)
  98     wxFLAGS_MEMBER(wxSL_RIGHT)
  99     wxFLAGS_MEMBER(wxSL_BOTTOM)
 100     wxFLAGS_MEMBER(wxSL_BOTH)
 101     wxFLAGS_MEMBER(wxSL_SELRANGE)
 102     wxFLAGS_MEMBER(wxSL_INVERSE)
 103
 104 wxEND_FLAGS( wxSliderStyle )
 105
 106 IMPLEMENT_DYNAMIC_CLASS_XTI(wxSlider, wxControl,"wx/scrolbar.h")
 107
 108 wxBEGIN_PROPERTIES_TABLE(wxSlider)
 109     wxEVENT_RANGE_PROPERTY( Scroll , wxEVT_SCROLL_TOP , wxEVT_SCROLL_CHANGED , wxScrollEvent )
 110     wxEVENT_PROPERTY( Updated , wxEVT_COMMAND_SLIDER_UPDATED , wxCommandEvent )
 111
 112     wxPROPERTY( Value , int , SetValue, GetValue , 0, 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 113     wxPROPERTY( Minimum , int , SetMin, GetMin, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 114     wxPROPERTY( Maximum , int , SetMax, GetMax, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 115     wxPROPERTY( PageSize , int , SetPageSize, GetLineSize, 1 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 116     wxPROPERTY( LineSize , int , SetLineSize, GetLineSize, 1 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 117     wxPROPERTY( ThumbLength , int , SetThumbLength, GetThumbLength, 1 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 118     wxPROPERTY_FLAGS( WindowStyle , wxSliderStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 119 wxEND_PROPERTIES_TABLE()
 120
 121 wxBEGIN_HANDLERS_TABLE(wxSlider)
 122 wxEND_HANDLERS_TABLE()
 123
 124 wxCONSTRUCTOR_8( wxSlider , wxWindow* , Parent , wxWindowID , Id , int , Value , int , Minimum , int , Maximum , wxPoint , Position , wxSize , Size , long , WindowStyle )
 125 #else
 126 IMPLEMENT_DYNAMIC_CLASS(wxSlider, wxControl)
 127 #endif
 128
 129 // ============================================================================
 130 // wxSlider implementation
 131 // ============================================================================
 132
 133 // ----------------------------------------------------------------------------
 134 // construction
 135 // ----------------------------------------------------------------------------
 136
 137 void wxSlider::Init()
 138 {
 139     m_labels = NULL;
 140
 141     m_pageSize = 1;
 142     m_lineSize = 1;
 143     m_rangeMax = 0;
 144     m_rangeMin = 0;
 145     m_tickFreq = 0;
 146
 147     m_isDragging = false;
 148 }
 149
 150 bool
 151 wxSlider::Create(wxWindow *parent,
 152                  wxWindowID id,
 153                  int value,
 154                  int minValue,
 155                  int maxValue,
 156                  const wxPoint& pos,
 157                  const wxSize& size,
 158                  long style,
 159                  const wxValidator& validator,
 160                  const wxString& name)
 161 {
 162     // our styles are redundant: wxSL_LEFT/RIGHT imply wxSL_VERTICAL and
 163     // wxSL_TOP/BOTTOM imply wxSL_HORIZONTAL, but for backwards compatibility
 164     // reasons we can't really change it, instead try to infer the orientation
 165     // from the flags given to us here
 166     switch ( style & (wxSL_LEFT | wxSL_RIGHT | wxSL_TOP | wxSL_BOTTOM) )
 167     {
 168         case wxSL_LEFT:
 169         case wxSL_RIGHT:
 170             style |= wxSL_VERTICAL;
 171             break;
 172
 173         case wxSL_TOP:
 174         case wxSL_BOTTOM:
 175             style |= wxSL_HORIZONTAL;
 176             break;
 177
 178         case 0:
 179             // no specific direction, do we have at least the orientation?
 180             if ( !(style & (wxSL_HORIZONTAL | wxSL_VERTICAL)) )
 181             {
 182                 // no, choose default
 183                 style |= wxSL_BOTTOM | wxSL_HORIZONTAL;
 184             }
 185     };
 186
 187     wxASSERT_MSG( !(style & wxSL_VERTICAL) || !(style & wxSL_HORIZONTAL),
 188                     _T("incompatible slider direction and orientation") );
 189
 190
 191     // initialize everything
 192     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 193         return false;
 194
 195     // ensure that we have correct values for GetLabelsSize()
 196     m_rangeMin = minValue;
 197     m_rangeMax = maxValue;
 198
 199     // create the labels first, so that our DoGetBestSize() could take them
 200     // into account
 201     //
 202     // note that we could simply create 3 wxStaticTexts here but it could
 203     // result in some observable side effects at wx level (e.g. the parent of
 204     // wxSlider would have 3 more children than expected) and so we prefer not
 205     // to do it like this
 206     if ( m_windowStyle & wxSL_LABELS )
 207     {
 208         m_labels = new wxSubwindows(SliderLabel_Last);
 209
 210         HWND hwndParent = GetHwndOf(parent);
 211         for ( size_t n = 0; n < SliderLabel_Last; n++ )
 212         {
 213             (*m_labels)[n] = ::CreateWindow
 214                                (
 215                                     wxT("STATIC"),
 216                                     NULL,
 217                                     WS_CHILD | WS_VISIBLE | SS_CENTER,
 218                                     0, 0, 0, 0,
 219                                     hwndParent,
 220                                     (HMENU)NewControlId(),
 221                                     wxGetInstance(),
 222                                     NULL
 223                                );
 224         }
 225
 226         m_labels->SetFont(GetFont());
 227     }
 228
 229     // now create the main control too
 230     if ( !MSWCreateControl(TRACKBAR_CLASS, wxEmptyString, pos, size) )
 231         return false;
 232
 233     // and initialize everything
 234     SetRange(minValue, maxValue);
 235     SetValue(value);
 236     SetPageSize((maxValue - minValue)/10);
 237
 238     // we need to position the labels correctly if we have them and if
 239     // SetSize() hadn't been called before (when best size was determined by
 240     // MSWCreateControl()) as in this case they haven't been put in place yet
 241     if ( m_labels && size.x != wxDefaultCoord && size.y != wxDefaultCoord )
 242     {
 243         SetSize(size);
 244     }
 245
 246     return true;
 247 }
 248
 249 WXDWORD wxSlider::MSWGetStyle(long style, WXDWORD *exstyle) const
 250 {
 251     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 252
 253     // TBS_HORZ, TBS_RIGHT and TBS_BOTTOM are 0 but do include them for clarity
 254     msStyle |= style & wxSL_VERTICAL ? TBS_VERT : TBS_HORZ;
 255
 256     if ( style & wxSL_BOTH )
 257     {
 258         // this fully specifies the style combined with TBS_VERT/HORZ above
 259         msStyle |= TBS_BOTH;
 260     }
 261     else // choose one direction
 262     {
 263         if ( style & wxSL_LEFT )
 264             msStyle |= TBS_LEFT;
 265         else if ( style & wxSL_RIGHT )
 266             msStyle |= TBS_RIGHT;
 267         else if ( style & wxSL_TOP )
 268             msStyle |= TBS_TOP;
 269         else if ( style & wxSL_BOTTOM )
 270             msStyle |= TBS_BOTTOM;
 271     }
 272
 273     if ( style & wxSL_AUTOTICKS )
 274         msStyle |= TBS_AUTOTICKS;
 275     else
 276         msStyle |= TBS_NOTICKS;
 277
 278     if ( style & wxSL_SELRANGE )
 279         msStyle |= TBS_ENABLESELRANGE;
 280
 281     return msStyle;
 282 }
 283
 284 wxSlider::~wxSlider()
 285 {
 286     delete m_labels;
 287 }
 288
 289 // ----------------------------------------------------------------------------
 290 // event handling
 291 // ----------------------------------------------------------------------------
 292
 293 bool wxSlider::MSWOnScroll(int WXUNUSED(orientation),
 294                            WXWORD wParam,
 295                            WXWORD WXUNUSED(pos),
 296                            WXHWND control)
 297 {
 298     wxEventType scrollEvent;
 299     switch ( wParam )
 300     {
 301         case SB_TOP:
 302             scrollEvent = wxEVT_SCROLL_TOP;
 303             break;
 304
 305         case SB_BOTTOM:
 306             scrollEvent = wxEVT_SCROLL_BOTTOM;
 307             break;
 308
 309         case SB_LINEUP:
 310             scrollEvent = wxEVT_SCROLL_LINEUP;
 311             break;
 312
 313         case SB_LINEDOWN:
 314             scrollEvent = wxEVT_SCROLL_LINEDOWN;
 315             break;
 316
 317         case SB_PAGEUP:
 318             scrollEvent = wxEVT_SCROLL_PAGEUP;
 319             break;
 320
 321         case SB_PAGEDOWN:
 322             scrollEvent = wxEVT_SCROLL_PAGEDOWN;
 323             break;
 324
 325         case SB_THUMBTRACK:
 326             scrollEvent = wxEVT_SCROLL_THUMBTRACK;
 327             m_isDragging = true;
 328             break;
 329
 330         case SB_THUMBPOSITION:
 331             if ( m_isDragging )
 332             {
 333                 scrollEvent = wxEVT_SCROLL_THUMBRELEASE;
 334                 m_isDragging = false;
 335             }
 336             else
 337             {
 338                 // this seems to only happen when the mouse wheel is used: in
 339                 // this case, as it might be unexpected to get THUMBRELEASE
 340                 // without preceding THUMBTRACKs, we don't generate it at all
 341                 // but generate CHANGED event because the control itself does
 342                 // not send us SB_ENDSCROLL for whatever reason when mouse
 343                 // wheel is used
 344                 scrollEvent = wxEVT_SCROLL_CHANGED;
 345             }
 346             break;
 347
 348         case SB_ENDSCROLL:
 349             scrollEvent = wxEVT_SCROLL_CHANGED;
 350             break;
 351
 352         default:
 353             // unknown scroll event?
 354             return false;
 355     }
 356
 357     int newPos = ValueInvertOrNot((int) ::SendMessage((HWND) control, TBM_GETPOS, 0, 0));
 358     if ( (newPos < GetMin()) || (newPos > GetMax()) )
 359     {
 360         // out of range - but we did process it
 361         return true;
 362     }
 363
 364     SetValue(newPos);
 365
 366     wxScrollEvent event(scrollEvent, m_windowId);
 367     event.SetPosition(newPos);
 368     event.SetEventObject( this );
 369     GetEventHandler()->ProcessEvent(event);
 370
 371     wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, GetId() );
 372     cevent.SetInt( newPos );
 373     cevent.SetEventObject( this );
 374
 375     return GetEventHandler()->ProcessEvent( cevent );
 376 }
 377
 378 void wxSlider::Command (wxCommandEvent & event)
 379 {
 380     SetValue (event.GetInt());
 381     ProcessCommand (event);
 382 }
 383
 384 // ----------------------------------------------------------------------------
 385 // geometry stuff
 386 // ----------------------------------------------------------------------------
 387
 388 wxRect wxSlider::GetBoundingBox() const
 389 {
 390     // take care not to call our own functions which would call us recursively
 391     int x, y, w, h;
 392     wxSliderBase::DoGetPosition(&x, &y);
 393     wxSliderBase::DoGetSize(&w, &h);
 394
 395     wxRect rect(x, y, w, h);
 396     if ( m_labels )
 397     {
 398         wxRect lrect = m_labels->GetBoundingBox();
 399         GetParent()->ScreenToClient(&lrect.x, &lrect.y);
 400         rect.Union(lrect);
 401     }
 402
 403     return rect;
 404 }
 405
 406 void wxSlider::DoGetSize(int *width, int *height) const
 407 {
 408     wxRect rect = GetBoundingBox();
 409
 410     if ( width )
 411         *width = rect.width;
 412     if ( height )
 413         *height = rect.height;
 414 }
 415
 416 void wxSlider::DoGetPosition(int *x, int *y) const
 417 {
 418     wxRect rect = GetBoundingBox();
 419
 420     if ( x )
 421         *x = rect.x;
 422     if ( y )
 423         *y = rect.y;
 424 }
 425
 426 int wxSlider::GetLabelsSize(int *width) const
 427 {
 428     int cy;
 429
 430     if ( width )
 431     {
 432         // find the max label width
 433         int wLabelMin, wLabelMax;
 434         GetTextExtent(Format(m_rangeMin), &wLabelMin, &cy);
 435         GetTextExtent(Format(m_rangeMax), &wLabelMax, &cy);
 436
 437         *width = wxMax(wLabelMin, wLabelMax);
 438     }
 439     else
 440     {
 441         cy = GetCharHeight();
 442     }
 443
 444     return EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 445 }
 446
 447 void wxSlider::DoMoveWindow(int x, int y, int width, int height)
 448 {
 449     // all complications below are because we need to position the labels,
 450     // without them everything is easy
 451     if ( !m_labels )
 452     {
 453         wxSliderBase::DoMoveWindow(x, y, width, height);
 454         return;
 455     }
 456
 457     // be careful to position the slider itself after moving the labels as
 458     // otherwise our GetBoundingBox(), which is called from WM_SIZE handler,
 459     // would return a wrong result and wrong size would be cached internally
 460     if ( HasFlag(wxSL_VERTICAL) )
 461     {
 462         int wLabel;
 463         int hLabel = GetLabelsSize(&wLabel);
 464
 465         int xLabel = HasFlag(wxSL_LEFT) ? x + width - wLabel : x;
 466
 467         // position all labels: min at the top, value in the middle and max at
 468         // the bottom
 469         DoMoveSibling((HWND)(*m_labels)[SliderLabel_Min],
 470                      xLabel, y, wLabel, hLabel);
 471
 472         DoMoveSibling((HWND)(*m_labels)[SliderLabel_Value],
 473                      xLabel, y + (height - hLabel)/2, wLabel, hLabel);
 474
 475         DoMoveSibling((HWND)(*m_labels)[SliderLabel_Max],
 476                       xLabel, y + height - hLabel, wLabel, hLabel);
 477
 478         // position the slider itself along the left/right edge
 479         wxSliderBase::DoMoveWindow(HasFlag(wxSL_LEFT) ? x : x + wLabel + HGAP,
 480                                    y + hLabel/2,
 481                                    width - wLabel - HGAP,
 482                                    height - hLabel);
 483     }
 484     else // horizontal
 485     {
 486         int wLabel;
 487         int hLabel = GetLabelsSize(&wLabel);
 488
 489         int yLabel = HasFlag(wxSL_TOP) ? y + height - hLabel : y;
 490
 491         // position all labels: min on the left, value in the middle and max to
 492         // the right
 493         DoMoveSibling((HWND)(*m_labels)[SliderLabel_Min],
 494                       x, yLabel, wLabel, hLabel);
 495
 496         DoMoveSibling((HWND)(*m_labels)[SliderLabel_Value],
 497                       x + (width - wLabel)/2, yLabel, wLabel, hLabel);
 498
 499         DoMoveSibling((HWND)(*m_labels)[SliderLabel_Max],
 500                       x + width - wLabel, yLabel, wLabel, hLabel);
 501
 502         // position the slider itself along the top/bottom edge
 503         wxSliderBase::DoMoveWindow(x,
 504                                    HasFlag(wxSL_TOP) ? y : y + hLabel,
 505                                    width,
 506                                    height - hLabel);
 507     }
 508 }
 509
 510 wxSize wxSlider::DoGetBestSize() const
 511 {
 512     // these values are arbitrary
 513     static const int length = 100;
 514     static const int thumb = 24;
 515     static const int ticks = 8;
 516
 517     int *width;
 518     wxSize size;
 519     if ( HasFlag(wxSL_VERTICAL) )
 520     {
 521         size.x = thumb;
 522         size.y = length;
 523         width = &size.x;
 524
 525         if ( m_labels )
 526         {
 527             int wLabel;
 528             int hLabel = GetLabelsSize(&wLabel);
 529
 530             // account for the labels
 531             size.x += HGAP + wLabel;
 532
 533             // labels are indented relative to the slider itself
 534             size.y += hLabel;
 535         }
 536     }
 537     else // horizontal
 538     {
 539         size.x = length;
 540         size.y = thumb;
 541         width = &size.y;
 542
 543         if ( m_labels )
 544         {
 545             // labels add extra height
 546             size.y += GetLabelsSize();
 547         }
 548     }
 549
 550     // need extra space to show ticks
 551     if ( HasFlag(wxSL_TICKS) )
 552     {
 553         *width += ticks;
 554
 555         // and maybe twice as much if we show them on both sides
 556         if ( HasFlag(wxSL_BOTH) )
 557             *width += ticks;
 558     }
 559
 560     return size;
 561 }
 562
 563 // ----------------------------------------------------------------------------
 564 // slider-specific methods
 565 // ----------------------------------------------------------------------------
 566
 567 int wxSlider::GetValue() const
 568 {
 569     return ValueInvertOrNot(::SendMessage(GetHwnd(), TBM_GETPOS, 0, 0));
 570 }
 571
 572 void wxSlider::SetValue(int value)
 573 {
 574     ::SendMessage(GetHwnd(), TBM_SETPOS, (WPARAM)TRUE, (LPARAM)ValueInvertOrNot(value));
 575
 576     if ( m_labels )
 577     {
 578         ::SetWindowText((*m_labels)[SliderLabel_Value], Format(value));
 579     }
 580 }
 581
 582 void wxSlider::SetRange(int minValue, int maxValue)
 583 {
 584     m_rangeMin = minValue;
 585     m_rangeMax = maxValue;
 586
 587     ::SendMessage(GetHwnd(), TBM_SETRANGEMIN, TRUE, m_rangeMin);
 588     ::SendMessage(GetHwnd(), TBM_SETRANGEMAX, TRUE, m_rangeMax);
 589
 590     if ( m_labels )
 591     {
 592         ::SetWindowText((*m_labels)[SliderLabel_Min], Format(ValueInvertOrNot(m_rangeMin)));
 593         ::SetWindowText((*m_labels)[SliderLabel_Max], Format(ValueInvertOrNot(m_rangeMax)));
 594     }
 595 }
 596
 597 void wxSlider::SetTickFreq(int n, int pos)
 598 {
 599     m_tickFreq = n;
 600     ::SendMessage( GetHwnd(), TBM_SETTICFREQ, (WPARAM) n, (LPARAM) pos );
 601 }
 602
 603 void wxSlider::SetPageSize(int pageSize)
 604 {
 605     ::SendMessage( GetHwnd(), TBM_SETPAGESIZE, (WPARAM) 0, (LPARAM) pageSize );
 606     m_pageSize = pageSize;
 607 }
 608
 609 int wxSlider::GetPageSize() const
 610 {
 611     return m_pageSize;
 612 }
 613
 614 void wxSlider::ClearSel()
 615 {
 616     ::SendMessage(GetHwnd(), TBM_CLEARSEL, (WPARAM) TRUE, (LPARAM) 0);
 617 }
 618
 619 void wxSlider::ClearTicks()
 620 {
 621     ::SendMessage(GetHwnd(), TBM_CLEARTICS, (WPARAM) TRUE, (LPARAM) 0);
 622 }
 623
 624 void wxSlider::SetLineSize(int lineSize)
 625 {
 626     m_lineSize = lineSize;
 627     ::SendMessage(GetHwnd(), TBM_SETLINESIZE, (WPARAM) 0, (LPARAM) lineSize);
 628 }
 629
 630 int wxSlider::GetLineSize() const
 631 {
 632     return (int)::SendMessage(GetHwnd(), TBM_GETLINESIZE, 0, 0);
 633 }
 634
 635 int wxSlider::GetSelEnd() const
 636 {
 637     return (int)::SendMessage(GetHwnd(), TBM_GETSELEND, 0, 0);
 638 }
 639
 640 int wxSlider::GetSelStart() const
 641 {
 642     return (int)::SendMessage(GetHwnd(), TBM_GETSELSTART, 0, 0);
 643 }
 644
 645 void wxSlider::SetSelection(int minPos, int maxPos)
 646 {
 647     ::SendMessage(GetHwnd(), TBM_SETSEL,
 648                   (WPARAM) TRUE /* redraw */,
 649                   (LPARAM) MAKELONG( minPos, maxPos) );
 650 }
 651
 652 void wxSlider::SetThumbLength(int len)
 653 {
 654     ::SendMessage(GetHwnd(), TBM_SETTHUMBLENGTH, (WPARAM) len, (LPARAM) 0);
 655 }
 656
 657 int wxSlider::GetThumbLength() const
 658 {
 659     return (int)::SendMessage( GetHwnd(), TBM_GETTHUMBLENGTH, 0, 0);
 660 }
 661
 662 void wxSlider::SetTick(int tickPos)
 663 {
 664     ::SendMessage( GetHwnd(), TBM_SETTIC, (WPARAM) 0, (LPARAM) tickPos );
 665 }
 666
 667 // ----------------------------------------------------------------------------
 668 // composite control methods
 669 // ----------------------------------------------------------------------------
 670
 671 WXHWND wxSlider::GetStaticMin() const
 672 {
 673     return m_labels ? (WXHWND)(*m_labels)[SliderLabel_Min] : NULL;
 674 }
 675
 676 WXHWND wxSlider::GetStaticMax() const
 677 {
 678     return m_labels ? (WXHWND)(*m_labels)[SliderLabel_Max] : NULL;
 679 }
 680
 681 WXHWND wxSlider::GetEditValue() const
 682 {
 683     return m_labels ? (WXHWND)(*m_labels)[SliderLabel_Value] : NULL;
 684 }
 685
 686 WX_FORWARD_STD_METHODS_TO_SUBWINDOWS(wxSlider, wxSliderBase, m_labels)
 687
 688 #endif // wxUSE_SLIDER