src/osx/slider_osx.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/slider_osx.cpp
   3 // Purpose:     wxSlider
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id: slider.cpp 54129 2008-06-11 19:30:52Z SC $
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:       wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_SLIDER
  15
  16 #include "wx/slider.h"
  17 #include "wx/osx/private.h"
  18
  19 IMPLEMENT_DYNAMIC_CLASS(wxSlider, wxControl)
  20
  21 BEGIN_EVENT_TABLE(wxSlider, wxControl)
  22 END_EVENT_TABLE()
  23
  24  // The dimensions of the different styles of sliders (from Aqua document)
  25 #if wxOSX_USE_COCOA
  26     #define wxSLIDER_DIMENSIONACROSS_WITHTICKMARKS 28
  27     #define wxSLIDER_DIMENSIONACROSS_ARROW 21
  28 #else
  29     #define wxSLIDER_DIMENSIONACROSS_WITHTICKMARKS 24
  30     #define wxSLIDER_DIMENSIONACROSS_ARROW 18
  31 #endif
  32
  33 // Distance between slider and text
  34 #define wxSLIDER_BORDERTEXT 5
  35
  36 // NB: The default orientation for a slider is horizontal; however, if the user specifies
  37 // some slider styles but doesn't specify the orientation we have to assume he wants a
  38 // horizontal one. Therefore in this file when testing for the slider's orientation
  39 // vertical is tested for if this is not set then we use the horizontal one
  40 // e.g., if (GetWindowStyle() & wxSL_VERTICAL) {} else { horizontal case }.
  41
  42 wxSlider::wxSlider()
  43 {
  44     m_pageSize = 1;
  45     m_lineSize = 1;
  46     m_rangeMax = 0;
  47     m_rangeMin = 0;
  48     m_tickFreq = 0;
  49
  50     m_macMinimumStatic = NULL;
  51     m_macMaximumStatic = NULL;
  52     m_macValueStatic = NULL;
  53 }
  54
  55 bool wxSlider::Create(wxWindow *parent,
  56     wxWindowID id,
  57     int value, int minValue, int maxValue,
  58     const wxPoint& pos,
  59     const wxSize& size, long style,
  60     const wxValidator& validator,
  61     const wxString& name)
  62 {
  63     m_macIsUserPane = false;
  64
  65     m_macMinimumStatic = NULL;
  66     m_macMaximumStatic = NULL;
  67     m_macValueStatic = NULL;
  68
  69     m_lineSize = 1;
  70     m_tickFreq = 0;
  71
  72     m_rangeMax = maxValue;
  73     m_rangeMin = minValue;
  74
  75     m_pageSize = (int)((maxValue - minValue) / 10);
  76
  77     // our styles are redundant: wxSL_LEFT/RIGHT imply wxSL_VERTICAL and
  78     // wxSL_TOP/BOTTOM imply wxSL_HORIZONTAL, but for backwards compatibility
  79     // reasons we can't really change it, instead try to infer the orientation
  80     // from the flags given to us here
  81     switch ( style & (wxSL_LEFT | wxSL_RIGHT | wxSL_TOP | wxSL_BOTTOM) )
  82     {
  83         case wxSL_LEFT:
  84         case wxSL_RIGHT:
  85             style |= wxSL_VERTICAL;
  86             break;
  87
  88         case wxSL_TOP:
  89         case wxSL_BOTTOM:
  90             style |= wxSL_HORIZONTAL;
  91             break;
  92
  93         case 0:
  94         default:
  95             // no specific direction, do we have at least the orientation?
  96             if ( !(style & (wxSL_HORIZONTAL | wxSL_VERTICAL)) )
  97                 // no: choose default
  98                 style |= wxSL_BOTTOM | wxSL_HORIZONTAL;
  99             break;
 100     }
 101
 102     wxASSERT_MSG( !(style & wxSL_VERTICAL) || !(style & wxSL_HORIZONTAL),
 103         wxT("incompatible slider direction and orientation") );
 104
 105     if ( !wxControl::Create(parent, id, pos, size, style, validator, name) )
 106         return false;
 107
 108     m_peer = wxWidgetImpl::CreateSlider( this, parent, id, value, minValue, maxValue, pos, size, style, GetExtraStyle() );
 109
 110     if (style & wxSL_VERTICAL)
 111         // Forces SetSize to use the proper width
 112         SetSizeHints(10, -1, 10, -1);
 113     else
 114         // Forces SetSize to use the proper height
 115         SetSizeHints(-1, 10, -1, 10);
 116
 117     // NB: SetSizeHints is overloaded by wxSlider and will substitute 10 with the
 118     // proper dimensions, it also means other people cannot bugger the slider with
 119     // other values
 120
 121     if (style & wxSL_LABELS)
 122     {
 123         m_macMinimumStatic = new wxStaticText( parent, wxID_ANY, wxEmptyString );
 124         m_macMaximumStatic = new wxStaticText( parent, wxID_ANY, wxEmptyString );
 125         m_macValueStatic = new wxStaticText( parent, wxID_ANY, wxEmptyString );
 126     }
 127
 128     SetRange(minValue, maxValue);
 129     SetValue(value);
 130
 131     MacPostControlCreate(pos, size);
 132
 133     return true;
 134 }
 135
 136 wxSlider::~wxSlider()
 137 {
 138     // this is a special case, as we had to add windows as siblings we are
 139     // responsible for their disposal, but only if we are not part of a DestroyAllChildren
 140     if ( m_parent && !m_parent->IsBeingDeleted() )
 141     {
 142         delete m_macMinimumStatic;
 143         delete m_macMaximumStatic;
 144         delete m_macValueStatic;
 145     }
 146 }
 147
 148 int wxSlider::GetValue() const
 149 {
 150     // We may need to invert the value returned by the widget
 151     return ValueInvertOrNot( m_peer->GetValue() ) ;
 152 }
 153
 154 void wxSlider::SetValue(int value)
 155 {
 156     if ( m_macValueStatic )
 157     {
 158         wxString valuestring;
 159         valuestring.Printf( wxT("%d"), value );
 160         m_macValueStatic->SetLabel( valuestring );
 161     }
 162
 163     // We only invert for the setting of the actual native widget
 164     m_peer->SetValue( ValueInvertOrNot( value ) );
 165 }
 166
 167 void wxSlider::SetRange(int minValue, int maxValue)
 168 {
 169     wxString value;
 170
 171     m_rangeMin = minValue;
 172     m_rangeMax = maxValue;
 173
 174     m_peer->SetMinimum( m_rangeMin );
 175     m_peer->SetMaximum( m_rangeMax );
 176
 177     if (m_macMinimumStatic)
 178     {
 179         value.Printf( wxT("%d"), ValueInvertOrNot( m_rangeMin ) );
 180         m_macMinimumStatic->SetLabel( value );
 181     }
 182
 183     if (m_macMaximumStatic)
 184     {
 185         value.Printf( wxT("%d"), ValueInvertOrNot( m_rangeMax ) );
 186         m_macMaximumStatic->SetLabel( value );
 187     }
 188
 189     // If the range is out of bounds, set it to a
 190     // value that is within bounds
 191     // RN: Testing reveals OSX does its own
 192     // bounding, perhaps this isn't needed?
 193     int currentValue = GetValue();
 194
 195     if(currentValue < m_rangeMin)
 196         SetValue(m_rangeMin);
 197     else if(currentValue > m_rangeMax)
 198         SetValue(m_rangeMax);
 199 }
 200
 201 // For trackbars only
 202 void wxSlider::SetTickFreq(int n, int WXUNUSED(pos))
 203 {
 204     // TODO
 205     m_tickFreq = n;
 206 }
 207
 208 void wxSlider::SetPageSize(int pageSize)
 209 {
 210     // TODO
 211     m_pageSize = pageSize;
 212 }
 213
 214 int wxSlider::GetPageSize() const
 215 {
 216     return m_pageSize;
 217 }
 218
 219 void wxSlider::ClearSel()
 220 {
 221     // TODO
 222 }
 223
 224 void wxSlider::ClearTicks()
 225 {
 226     // TODO
 227 }
 228
 229 void wxSlider::SetLineSize(int lineSize)
 230 {
 231     m_lineSize = lineSize;
 232     // TODO
 233 }
 234
 235 int wxSlider::GetLineSize() const
 236 {
 237     // TODO
 238     return m_lineSize;
 239 }
 240
 241 int wxSlider::GetSelEnd() const
 242 {
 243     // TODO
 244     return 0;
 245 }
 246
 247 int wxSlider::GetSelStart() const
 248 {
 249     // TODO
 250     return 0;
 251 }
 252
 253 void wxSlider::SetSelection(int WXUNUSED(minPos), int WXUNUSED(maxPos))
 254 {
 255     // TODO
 256 }
 257
 258 void wxSlider::SetThumbLength(int WXUNUSED(len))
 259 {
 260     // TODO
 261 }
 262
 263 int wxSlider::GetThumbLength() const
 264 {
 265     // TODO
 266     return 0;
 267 }
 268
 269 void wxSlider::SetTick(int WXUNUSED(tickPos))
 270 {
 271     // TODO
 272 }
 273
 274 void wxSlider::Command(wxCommandEvent &event)
 275 {
 276     SetValue(event.GetInt());
 277     ProcessCommand(event);
 278 }
 279
 280 void wxSlider::TriggerScrollEvent( wxEventType scrollEvent)
 281 {
 282     // Whatever the native value is, we may need to invert it for calling
 283     // SetValue and putting the possibly inverted value in the event
 284     int value = ValueInvertOrNot( m_peer->GetValue() );
 285
 286     SetValue( value );
 287
 288     wxScrollEvent event( scrollEvent, m_windowId );
 289     event.SetPosition( value );
 290     event.SetEventObject( this );
 291     HandleWindowEvent( event );
 292
 293     wxCommandEvent cevent( wxEVT_COMMAND_SLIDER_UPDATED, m_windowId );
 294     cevent.SetInt( value );
 295     cevent.SetEventObject( this );
 296     HandleWindowEvent( cevent );
 297 }
 298
 299 bool wxSlider::OSXHandleClicked( double WXUNUSED(timestampsec) )
 300 {
 301     TriggerScrollEvent(wxEVT_SCROLL_THUMBRELEASE);
 302
 303     return true;
 304 }
 305
 306 // This is overloaded in wxSlider so that the proper width/height will always be used
 307 // for the slider different values would cause redrawing and mouse detection problems
 308 //
 309 void wxSlider::DoSetSizeHints( int minW, int minH,
 310     int maxW, int maxH,
 311     int WXUNUSED(incW), int WXUNUSED(incH) )
 312 {
 313     wxSize size = GetBestSize();
 314
 315     if (GetWindowStyle() & wxSL_VERTICAL)
 316     {
 317         SetMinSize( wxSize(size.x,minH) );
 318         SetMaxSize( wxSize(size.x,maxH) );
 319     }
 320     else
 321     {
 322         SetMinSize( wxSize(minW,size.y) );
 323         SetMaxSize( wxSize(maxW,size.y) );
 324     }
 325 }
 326
 327 wxSize wxSlider::DoGetBestSize() const
 328 {
 329     wxSize size;
 330     int textwidth, textheight;
 331     int mintwidth, mintheight;
 332     int maxtwidth, maxtheight;
 333
 334     textwidth = textheight = 0;
 335     mintwidth = mintheight = 0;
 336     maxtwidth = maxtheight = 0;
 337
 338     if (GetWindowStyle() & wxSL_LABELS)
 339     {
 340         wxString text;
 341
 342         // Get maximum text label width and height
 343         text.Printf( wxT("%d"), ValueInvertOrNot( m_rangeMin ) );
 344         GetTextExtent(text, &mintwidth, &mintheight);
 345         text.Printf( wxT("%d"), ValueInvertOrNot( m_rangeMax ) );
 346         GetTextExtent(text, &maxtwidth, &maxtheight);
 347
 348         if (maxtheight > mintheight)
 349             textheight = maxtheight;
 350         else
 351             textheight = mintheight;
 352
 353         if (maxtwidth > mintwidth)
 354             textwidth = maxtwidth;
 355         else
 356             textwidth = mintwidth;
 357     }
 358
 359     if (GetWindowStyle() & wxSL_VERTICAL)
 360     {
 361         size.y = 150;
 362
 363         if (GetWindowStyle() & wxSL_AUTOTICKS)
 364             size.x = wxSLIDER_DIMENSIONACROSS_WITHTICKMARKS;
 365         else
 366             size.x = wxSLIDER_DIMENSIONACROSS_ARROW;
 367
 368         if (GetWindowStyle() & wxSL_LABELS)
 369             size.x += textwidth + wxSLIDER_BORDERTEXT;
 370     }
 371     else
 372     {
 373         size.x = 150;
 374
 375         if (GetWindowStyle() & wxSL_AUTOTICKS)
 376             size.y = wxSLIDER_DIMENSIONACROSS_WITHTICKMARKS;
 377         else
 378             size.y = wxSLIDER_DIMENSIONACROSS_ARROW;
 379
 380         if (GetWindowStyle() & wxSL_LABELS)
 381         {
 382             size.y += textheight + wxSLIDER_BORDERTEXT;
 383             size.x += (mintwidth / 2) + (maxtwidth / 2);
 384         }
 385     }
 386
 387     return size;
 388 }
 389
 390 void wxSlider::DoSetSize(int x, int y, int w, int h, int sizeFlags)
 391 {
 392     int yborder = 0;
 393     int minValWidth, maxValWidth, textheight;
 394     int sliderBreadth;
 395     int width = w;
 396
 397     if (GetWindowStyle() & wxSL_LABELS)
 398     {
 399         wxString text;
 400         int ht, valValWidth;
 401
 402         // Get maximum text label width and height
 403         text.Printf(wxT("%d"), ValueInvertOrNot( m_rangeMin ) );
 404         GetTextExtent(text, &minValWidth, &textheight);
 405         text.Printf(wxT("%d"), ValueInvertOrNot( m_rangeMax ) );
 406         GetTextExtent(text, &maxValWidth, &ht);
 407
 408         if (ht > textheight)
 409             textheight = ht;
 410
 411         if (GetWindowStyle() & wxSL_HORIZONTAL)
 412         {
 413             if ( m_macMinimumStatic )
 414             {
 415                 w -= minValWidth / 2;
 416                 x += minValWidth / 2;
 417             }
 418
 419             if ( m_macMaximumStatic )
 420                 w -= maxValWidth / 2;
 421         }
 422
 423         // Labels have this control's parent as their parent
 424         // so if this control is not at 0,0 relative to the parent
 425         // the labels need to know the position of this control
 426         // relative to its parent in order to size properly, so
 427         // move the control first so we can use GetPosition()
 428         wxControl::DoSetSize( x, y, w, h, sizeFlags );
 429
 430         if (GetWindowStyle() & wxSL_VERTICAL)
 431             // If vertical, use current value
 432             text.Printf(wxT("%d"), (int)m_peer->GetValue());
 433         else
 434             // Use max so that the current value doesn't drift as centering would need to change
 435             text.Printf(wxT("%d"), m_rangeMax);
 436
 437         GetTextExtent(text, &valValWidth, &ht);
 438
 439         yborder = textheight + wxSLIDER_BORDERTEXT;
 440
 441         // Get slider breadth
 442         if (GetWindowStyle() & wxSL_AUTOTICKS)
 443             sliderBreadth = wxSLIDER_DIMENSIONACROSS_WITHTICKMARKS;
 444         else
 445             sliderBreadth = wxSLIDER_DIMENSIONACROSS_ARROW;
 446
 447         if (GetWindowStyle() & wxSL_VERTICAL)
 448         {
 449             h = h - yborder;
 450
 451             if ( m_macMinimumStatic )
 452                 m_macMinimumStatic->Move(GetPosition().x + sliderBreadth + wxSLIDER_BORDERTEXT, GetPosition().y + h - yborder);
 453             if ( m_macMaximumStatic )
 454                 m_macMaximumStatic->Move(GetPosition().x + sliderBreadth + wxSLIDER_BORDERTEXT, GetPosition().y + 0);
 455             if ( m_macValueStatic )
 456                 m_macValueStatic->Move(GetPosition().x + sliderBreadth + wxSLIDER_BORDERTEXT, GetPosition().y + (h / 2) - (ht / 2));
 457         }
 458         else
 459         {
 460             if ( m_macMinimumStatic )
 461                 m_macMinimumStatic->Move(GetPosition().x, GetPosition().y + sliderBreadth + wxSLIDER_BORDERTEXT);
 462             if ( m_macMaximumStatic )
 463                  m_macMaximumStatic->Move(GetPosition().x + w - maxValWidth, GetPosition().y + sliderBreadth + wxSLIDER_BORDERTEXT);
 464             if ( m_macValueStatic )
 465                 m_macValueStatic->Move(GetPosition().x + (w / 2) - (valValWidth / 2), GetPosition().y + sliderBreadth + wxSLIDER_BORDERTEXT);
 466         }
 467     }
 468
 469     // yet another hack since this is a composite control
 470     // when wxSlider has it's size hardcoded, we're not allowed to
 471     // change the size. But when the control has labels, we DO need
 472     // to resize the internal Mac control to accommodate the text labels.
 473     // We need to trick the wxWidgets resize mechanism so that we can
 474     // resize the slider part of the control ONLY.
 475
 476     // TODO: Can all of this code go in the conditional wxSL_LABELS block?
 477
 478     int minWidth = m_minWidth;
 479
 480     if (GetWindowStyle() & wxSL_LABELS)
 481     {
 482         // make sure we don't allow the entire control to be resized accidently
 483         if (width == GetSize().x)
 484             m_minWidth = -1;
 485     }
 486
 487     // If the control has labels, we still need to call this again because
 488     // the labels alter the control's w and h values.
 489     wxControl::DoSetSize( x, y, w, h, sizeFlags );
 490
 491     m_minWidth = minWidth;
 492 }
 493
 494 void wxSlider::DoMoveWindow(int x, int y, int width, int height)
 495 {
 496     wxControl::DoMoveWindow( x, y, width, height );
 497 }
 498
 499 // Common processing to invert slider values based on wxSL_INVERSE
 500 int wxSlider::ValueInvertOrNot(int value) const
 501 {
 502     int result = 0;
 503
 504     if (m_windowStyle & wxSL_VERTICAL)
 505     {
 506         // The reason for the backwards logic is that Mac's vertical sliders are
 507         // inverted compared to Windows and GTK, hence we want inversion to be the
 508         // default, and if wxSL_INVERSE is set, then we do not invert (use native)
 509         if (m_windowStyle & wxSL_INVERSE)
 510             result = value;
 511         else
 512             result = (m_rangeMax + m_rangeMin) - value;
 513     }
 514     else // normal logic applies to HORIZONTAL sliders
 515     {
 516         result = wxSliderBase::ValueInvertOrNot(value);
 517     }
 518
 519     return result;
 520 }
 521
 522 #endif // wxUSE_SLIDER