samples/widgets/slider.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Program:     wxWidgets Widgets Sample
   3 // Name:        slider.cpp
   4 // Purpose:     Part of the widgets sample showing wxSlider
   5 // Author:      Vadim Zeitlin
   6 // Created:     16.04.01
   7 // Id:          $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin
   9 // License:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_SLIDER
  28
  29 // for all others, include the necessary headers
  30 #ifndef WX_PRECOMP
  31     #include "wx/log.h"
  32
  33     #include "wx/bitmap.h"
  34     #include "wx/button.h"
  35     #include "wx/checkbox.h"
  36     #include "wx/radiobox.h"
  37     #include "wx/slider.h"
  38     #include "wx/statbox.h"
  39     #include "wx/textctrl.h"
  40 #endif
  41
  42 #if wxUSE_TOOLTIPS
  43     #include "wx/tooltip.h"
  44 #endif
  45
  46 #include "wx/sizer.h"
  47
  48 #include "widgets.h"
  49
  50 #include "icons/slider.xpm"
  51
  52 // ----------------------------------------------------------------------------
  53 // constants
  54 // ----------------------------------------------------------------------------
  55
  56 // control ids
  57 enum
  58 {
  59     SliderPage_Reset = wxID_HIGHEST,
  60     SliderPage_Clear,
  61     SliderPage_SetValue,
  62     SliderPage_SetMinAndMax,
  63     SliderPage_SetTickFreq,
  64     SliderPage_SetThumbLen,
  65     SliderPage_CurValueText,
  66     SliderPage_ValueText,
  67     SliderPage_MinText,
  68     SliderPage_MaxText,
  69     SliderPage_TickFreqText,
  70     SliderPage_ThumbLenText,
  71     SliderPage_RadioSides,
  72     SliderPage_BothSides,
  73     SliderPage_Slider
  74 };
  75
  76 // sides radiobox values
  77 enum
  78 {
  79     SliderTicks_Top,
  80     SliderTicks_Bottom,
  81     SliderTicks_Left,
  82     SliderTicks_Right
  83 };
  84
  85 // ----------------------------------------------------------------------------
  86 // SliderWidgetsPage
  87 // ----------------------------------------------------------------------------
  88
  89 class SliderWidgetsPage : public WidgetsPage
  90 {
  91 public:
  92     SliderWidgetsPage(wxBookCtrlBase *book, wxImageList *imaglist);
  93     virtual ~SliderWidgetsPage(){};
  94
  95     virtual wxControl *GetWidget() const { return m_slider; }
  96
  97 protected:
  98     // event handlers
  99     void OnButtonReset(wxCommandEvent& event);
 100     void OnButtonClear(wxCommandEvent& event);
 101     void OnButtonSetValue(wxCommandEvent& event);
 102     void OnButtonSetMinAndMax(wxCommandEvent& event);
 103     void OnButtonSetTickFreq(wxCommandEvent& event);
 104     void OnButtonSetThumbLen(wxCommandEvent& event);
 105
 106     void OnCheckOrRadioBox(wxCommandEvent& event);
 107
 108     void OnSlider(wxScrollEvent& event);
 109
 110     void OnUpdateUIValueButton(wxUpdateUIEvent& event);
 111     void OnUpdateUIMinMaxButton(wxUpdateUIEvent& event);
 112     void OnUpdateUITickFreq(wxUpdateUIEvent& event);
 113     void OnUpdateUIThumbLen(wxUpdateUIEvent& event);
 114     void OnUpdateUIRadioSides(wxUpdateUIEvent& event);
 115     void OnUpdateUIBothSides(wxUpdateUIEvent& event);
 116
 117     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
 118
 119     void OnUpdateUICurValueText(wxUpdateUIEvent& event);
 120
 121     // reset the slider parameters
 122     void Reset();
 123
 124     // (re)create the slider
 125     void CreateSlider();
 126
 127     // set the tick frequency from the text field value
 128     void DoSetTickFreq();
 129
 130     // set the thumb len from the text field value
 131     void DoSetThumbLen();
 132
 133     // is this slider value in range?
 134     bool IsValidValue(int val) const
 135         { return (val >= m_min) && (val <= m_max); }
 136
 137     // the slider range
 138     int m_min, m_max;
 139
 140     // the controls
 141     // ------------
 142
 143     // the check/radio boxes for styles
 144     wxCheckBox *m_chkLabels,
 145                *m_chkInverse,
 146                *m_chkTicks,
 147                *m_chkBothSides;
 148
 149     wxRadioBox *m_radioSides;
 150
 151     // the slider itself and the sizer it is in
 152     wxSlider *m_slider;
 153     wxSizer *m_sizerSlider;
 154
 155     // the text entries for set value/range
 156     wxTextCtrl *m_textValue,
 157                *m_textMin,
 158                *m_textMax,
 159                *m_textTickFreq,
 160                *m_textThumbLen;
 161
 162 private:
 163     DECLARE_EVENT_TABLE()
 164     DECLARE_WIDGETS_PAGE(SliderWidgetsPage)
 165 };
 166
 167 // ----------------------------------------------------------------------------
 168 // event tables
 169 // ----------------------------------------------------------------------------
 170
 171 BEGIN_EVENT_TABLE(SliderWidgetsPage, WidgetsPage)
 172     EVT_BUTTON(SliderPage_Reset, SliderWidgetsPage::OnButtonReset)
 173     EVT_BUTTON(SliderPage_SetValue, SliderWidgetsPage::OnButtonSetValue)
 174     EVT_BUTTON(SliderPage_SetMinAndMax, SliderWidgetsPage::OnButtonSetMinAndMax)
 175     EVT_BUTTON(SliderPage_SetTickFreq, SliderWidgetsPage::OnButtonSetTickFreq)
 176     EVT_BUTTON(SliderPage_SetThumbLen, SliderWidgetsPage::OnButtonSetThumbLen)
 177
 178     EVT_UPDATE_UI(SliderPage_SetValue, SliderWidgetsPage::OnUpdateUIValueButton)
 179     EVT_UPDATE_UI(SliderPage_SetMinAndMax, SliderWidgetsPage::OnUpdateUIMinMaxButton)
 180     EVT_UPDATE_UI(SliderPage_SetTickFreq, SliderWidgetsPage::OnUpdateUITickFreq)
 181     EVT_UPDATE_UI(SliderPage_SetThumbLen, SliderWidgetsPage::OnUpdateUIThumbLen)
 182     EVT_UPDATE_UI(SliderPage_TickFreqText, SliderWidgetsPage::OnUpdateUITickFreq)
 183     EVT_UPDATE_UI(SliderPage_RadioSides, SliderWidgetsPage::OnUpdateUIRadioSides)
 184     EVT_UPDATE_UI(SliderPage_BothSides, SliderWidgetsPage::OnUpdateUIBothSides)
 185
 186     EVT_UPDATE_UI(SliderPage_Reset, SliderWidgetsPage::OnUpdateUIResetButton)
 187
 188     EVT_UPDATE_UI(SliderPage_CurValueText, SliderWidgetsPage::OnUpdateUICurValueText)
 189
 190     EVT_COMMAND_SCROLL(SliderPage_Slider, SliderWidgetsPage::OnSlider)
 191
 192     EVT_CHECKBOX(wxID_ANY, SliderWidgetsPage::OnCheckOrRadioBox)
 193     EVT_RADIOBOX(wxID_ANY, SliderWidgetsPage::OnCheckOrRadioBox)
 194 END_EVENT_TABLE()
 195
 196 // ============================================================================
 197 // implementation
 198 // ============================================================================
 199
 200 IMPLEMENT_WIDGETS_PAGE(SliderWidgetsPage, _T("Slider"));
 201
 202 SliderWidgetsPage::SliderWidgetsPage(wxBookCtrlBase *book,
 203                                      wxImageList *imaglist)
 204                   : WidgetsPage(book)
 205 {
 206     imaglist->Add(wxBitmap(slider_xpm));
 207
 208     // init everything
 209     m_min = 0;
 210     m_max = 100;
 211
 212     m_chkInverse =
 213     m_chkTicks =
 214     m_chkLabels =
 215     m_chkBothSides = (wxCheckBox *)NULL;
 216
 217     m_radioSides = (wxRadioBox *)NULL;
 218
 219     m_slider = (wxSlider *)NULL;
 220     m_sizerSlider = (wxSizer *)NULL;
 221
 222     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 223
 224     // left pane
 225     wxStaticBox *box = new wxStaticBox(this, wxID_ANY, _T("&Set style"));
 226     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 227
 228     m_chkInverse = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Inverse"));
 229     m_chkTicks = CreateCheckBoxAndAddToSizer(sizerLeft, _T("Show &ticks"));
 230     m_chkLabels = CreateCheckBoxAndAddToSizer(sizerLeft, _T("Show &labels"));
 231     static const wxString sides[] =
 232     {
 233         _T("top"),
 234         _T("bottom"),
 235         _T("left"),
 236         _T("right"),
 237     };
 238     m_radioSides = new wxRadioBox(this, SliderPage_RadioSides, _T("&Ticks/Labels"),
 239                                  wxDefaultPosition, wxDefaultSize,
 240                                  WXSIZEOF(sides), sides,
 241                                  1, wxRA_SPECIFY_COLS);
 242     sizerLeft->Add(m_radioSides, 0, wxGROW | wxALL, 5);
 243     m_chkBothSides = CreateCheckBoxAndAddToSizer
 244                      (sizerLeft, _T("&Both sides"), SliderPage_BothSides);
 245 #if wxUSE_TOOLTIPS
 246     m_chkBothSides->SetToolTip( _T("\"Both sides\" is only supported \nin Win95 and Universal") );
 247 #endif // wxUSE_TOOLTIPS
 248
 249     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 250
 251     wxButton *btn = new wxButton(this, SliderPage_Reset, _T("&Reset"));
 252     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 253
 254     // middle pane
 255     wxStaticBox *box2 = new wxStaticBox(this, wxID_ANY, _T("&Change slider value"));
 256     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 257
 258     wxTextCtrl *text;
 259     wxSizer *sizerRow = CreateSizerWithTextAndLabel(_T("Current value"),
 260                                                     SliderPage_CurValueText,
 261                                                     &text);
 262     text->SetEditable(false);
 263
 264     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 265
 266     sizerRow = CreateSizerWithTextAndButton(SliderPage_SetValue,
 267                                             _T("Set &value"),
 268                                             SliderPage_ValueText,
 269                                             &m_textValue);
 270     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 271
 272     sizerRow = CreateSizerWithTextAndButton(SliderPage_SetMinAndMax,
 273                                             _T("&Min and max"),
 274                                             SliderPage_MinText,
 275                                             &m_textMin);
 276
 277     m_textMax = new wxTextCtrl(this, SliderPage_MaxText, wxEmptyString);
 278     sizerRow->Add(m_textMax, 1, wxLEFT | wxALIGN_CENTRE_VERTICAL, 5);
 279
 280     m_textMin->SetValue( wxString::Format(_T("%d"), m_min) );
 281     m_textMax->SetValue( wxString::Format(_T("%d"), m_max) );
 282
 283     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 284
 285     sizerRow = CreateSizerWithTextAndButton(SliderPage_SetTickFreq,
 286                                             _T("Tick &frequency"),
 287                                             SliderPage_TickFreqText,
 288                                             &m_textTickFreq);
 289
 290     m_textTickFreq->SetValue(_T("10"));
 291
 292     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 293
 294     sizerRow = CreateSizerWithTextAndButton(SliderPage_SetThumbLen,
 295                                             _T("Thumb &length"),
 296                                             SliderPage_ThumbLenText,
 297                                             &m_textThumbLen);
 298
 299     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 300
 301     // right pane
 302     wxSizer *sizerRight = new wxBoxSizer(wxHORIZONTAL);
 303     sizerRight->SetMinSize(150, 40);
 304     m_sizerSlider = sizerRight; // save it to modify it later
 305
 306     Reset();
 307     CreateSlider();
 308
 309     // the 3 panes panes compose the window
 310     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 311     sizerTop->Add(sizerMiddle, 0, wxGROW | wxALL, 10);
 312     sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 313
 314     // final initializations
 315     SetSizer(sizerTop);
 316
 317     sizerTop->Fit(this);
 318 }
 319
 320 // ----------------------------------------------------------------------------
 321 // operations
 322 // ----------------------------------------------------------------------------
 323
 324 void SliderWidgetsPage::Reset()
 325 {
 326     m_chkInverse->SetValue(false);
 327     m_chkTicks->SetValue(true);
 328     m_chkLabels->SetValue(true);
 329     m_chkBothSides->SetValue(false);
 330
 331     m_radioSides->SetSelection(SliderTicks_Top);
 332 }
 333
 334 void SliderWidgetsPage::CreateSlider()
 335 {
 336     int flags = 0;
 337
 338     if ( m_chkInverse->GetValue() )
 339     {
 340         flags |= wxSL_INVERSE;
 341     }
 342
 343     if ( m_chkLabels->GetValue() )
 344     {
 345         flags |= wxSL_LABELS;
 346     }
 347
 348     if ( m_chkTicks->GetValue() )
 349     {
 350         flags |= wxSL_AUTOTICKS;
 351     }
 352
 353     switch ( m_radioSides->GetSelection() )
 354     {
 355         case SliderTicks_Top:
 356             flags |= wxSL_TOP;
 357             break;
 358
 359         case SliderTicks_Left:
 360             flags |= wxSL_LEFT;
 361             break;
 362
 363         case SliderTicks_Bottom:
 364             flags |= wxSL_BOTTOM;
 365             break;
 366
 367         case SliderTicks_Right:
 368             flags |= wxSL_RIGHT;
 369             break;
 370
 371         default:
 372             wxFAIL_MSG(_T("unexpected radiobox selection"));
 373             // fall through
 374     }
 375
 376     if ( m_chkBothSides->GetValue() )
 377     {
 378         flags |= wxSL_BOTH;
 379     }
 380
 381     int val = m_min;
 382     if ( m_slider )
 383     {
 384         int valOld = m_slider->GetValue();
 385         if ( !IsValidValue(valOld) )
 386         {
 387             val = valOld;
 388         }
 389
 390         m_sizerSlider->Detach( m_slider );
 391
 392         if ( m_sizerSlider->GetChildren().GetCount() )
 393         {
 394             // we have 2 spacers, remove them too
 395             m_sizerSlider->Remove( 0 );
 396             m_sizerSlider->Remove( 0 );
 397         }
 398
 399         delete m_slider;
 400     }
 401
 402     m_slider = new wxSlider(this, SliderPage_Slider,
 403                             val, m_min, m_max,
 404                             wxDefaultPosition, wxDefaultSize,
 405                             flags);
 406
 407     if ( m_slider->HasFlag(wxSL_VERTICAL) )
 408     {
 409         m_sizerSlider->Add(0, 0, 1);
 410         m_sizerSlider->Add(m_slider, 0, wxGROW | wxALL, 5);
 411         m_sizerSlider->Add(0, 0, 1);
 412     }
 413     else
 414     {
 415         m_sizerSlider->Add(m_slider, 1, wxCENTRE | wxALL, 5);
 416     }
 417
 418     if ( m_chkTicks->GetValue() )
 419     {
 420         DoSetTickFreq();
 421     }
 422
 423     m_sizerSlider->Layout();
 424 }
 425
 426 void SliderWidgetsPage::DoSetTickFreq()
 427 {
 428     long freq;
 429     if ( !m_textTickFreq->GetValue().ToLong(&freq) )
 430     {
 431         wxLogWarning(_T("Invalid slider tick frequency"));
 432
 433         return;
 434     }
 435
 436     m_slider->SetTickFreq(freq, 0 /* unused */);
 437 }
 438
 439 void SliderWidgetsPage::DoSetThumbLen()
 440 {
 441     long len;
 442     if ( !m_textThumbLen->GetValue().ToLong(&len) )
 443     {
 444         wxLogWarning(_T("Invalid slider thumb length"));
 445
 446         return;
 447     }
 448
 449     m_slider->SetThumbLength(len);
 450 }
 451
 452 // ----------------------------------------------------------------------------
 453 // event handlers
 454 // ----------------------------------------------------------------------------
 455
 456 void SliderWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 457 {
 458     Reset();
 459
 460     CreateSlider();
 461 }
 462
 463 void SliderWidgetsPage::OnButtonSetTickFreq(wxCommandEvent& WXUNUSED(event))
 464 {
 465     DoSetTickFreq();
 466 }
 467
 468 void SliderWidgetsPage::OnButtonSetThumbLen(wxCommandEvent& WXUNUSED(event))
 469 {
 470     DoSetThumbLen();
 471 }
 472
 473 void SliderWidgetsPage::OnButtonSetMinAndMax(wxCommandEvent& WXUNUSED(event))
 474 {
 475     long minNew,
 476          maxNew = 0; // init to suppress compiler warning
 477     if ( !m_textMin->GetValue().ToLong(&minNew) ||
 478          !m_textMax->GetValue().ToLong(&maxNew) ||
 479          minNew >= maxNew )
 480     {
 481         wxLogWarning(_T("Invalid min/max values for the slider."));
 482
 483         return;
 484     }
 485
 486     m_min = minNew;
 487     m_max = maxNew;
 488
 489     m_slider->SetRange(minNew, maxNew);
 490
 491     if ( m_slider->GetMin() != m_min ||
 492          m_slider->GetMax() != m_max )
 493     {
 494         wxLogWarning(_T("Invalid range in slider."));
 495     }
 496 }
 497
 498 void SliderWidgetsPage::OnButtonSetValue(wxCommandEvent& WXUNUSED(event))
 499 {
 500     long val;
 501     if ( !m_textValue->GetValue().ToLong(&val) || !IsValidValue(val) )
 502     {
 503         wxLogWarning(_T("Invalid slider value."));
 504
 505         return;
 506     }
 507
 508     m_slider->SetValue(val);
 509 }
 510
 511 void SliderWidgetsPage::OnUpdateUIValueButton(wxUpdateUIEvent& event)
 512 {
 513     long val;
 514     event.Enable( m_textValue->GetValue().ToLong(&val) && IsValidValue(val) );
 515 }
 516
 517 void SliderWidgetsPage::OnUpdateUITickFreq(wxUpdateUIEvent& event)
 518 {
 519     long freq;
 520     event.Enable( m_chkTicks->GetValue() &&
 521                   m_textTickFreq->GetValue().ToLong(&freq) &&
 522                   (freq > 0) && (freq <= m_max - m_min) );
 523 }
 524
 525 void SliderWidgetsPage::OnUpdateUIThumbLen(wxUpdateUIEvent& event)
 526 {
 527     long val;
 528     event.Enable( m_textThumbLen->GetValue().ToLong(&val));
 529 }
 530
 531 void SliderWidgetsPage::OnUpdateUIMinMaxButton(wxUpdateUIEvent& event)
 532 {
 533     long mn, mx;
 534     event.Enable( m_textMin->GetValue().ToLong(&mn) &&
 535                   m_textMax->GetValue().ToLong(&mx) &&
 536                   mn < mx);
 537 }
 538
 539 void SliderWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 540 {
 541     event.Enable( m_chkInverse->GetValue() ||
 542                   !m_chkTicks->GetValue() ||
 543                   !m_chkLabels->GetValue() ||
 544                   m_chkBothSides->GetValue() ||
 545                   m_radioSides->GetSelection() != SliderTicks_Top );
 546 }
 547
 548 void SliderWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& WXUNUSED(event))
 549 {
 550     CreateSlider();
 551 }
 552
 553 void SliderWidgetsPage::OnUpdateUICurValueText(wxUpdateUIEvent& event)
 554 {
 555     event.SetText( wxString::Format(_T("%d"), m_slider->GetValue()) );
 556 }
 557
 558 void SliderWidgetsPage::OnUpdateUIRadioSides(wxUpdateUIEvent& event)
 559 {
 560     event.Enable( m_chkLabels->GetValue() || m_chkTicks->GetValue() );
 561 }
 562
 563 void SliderWidgetsPage::OnUpdateUIBothSides(wxUpdateUIEvent& event)
 564 {
 565 #if defined(__WIN95__) || defined(__WXUNIVERSAL__)
 566     event.Enable( m_chkTicks->GetValue() );
 567 #else
 568     event.Enable( false );
 569 #endif // defined(__WIN95__) || defined(__WXUNIVERSAL__)
 570 }
 571
 572 void SliderWidgetsPage::OnSlider(wxScrollEvent& event)
 573 {
 574     wxASSERT_MSG( event.GetInt() == m_slider->GetValue(),
 575                   wxT("slider value should be the same") );
 576
 577     wxEventType eventType = event.GetEventType();
 578
 579     /*
 580         This array takes the EXACT order of the declarations in
 581         include/wx/event.h
 582         (section "wxScrollBar and wxSlider event identifiers")
 583     */
 584     static const wxChar *eventNames[] =
 585     {
 586         wxT("wxEVT_SCROLL_TOP"),
 587         wxT("wxEVT_SCROLL_BOTTOM"),
 588         wxT("wxEVT_SCROLL_LINEUP"),
 589         wxT("wxEVT_SCROLL_LINEDOWN"),
 590         wxT("wxEVT_SCROLL_PAGEUP"),
 591         wxT("wxEVT_SCROLL_PAGEDOWN"),
 592         wxT("wxEVT_SCROLL_THUMBTRACK"),
 593         wxT("wxEVT_SCROLL_THUMBRELEASE"),
 594         wxT("wxEVT_SCROLL_CHANGED")
 595     };
 596
 597     int index = eventType - wxEVT_SCROLL_TOP;
 598
 599     /*
 600         If this assert is triggered, there is an unknown slider event which
 601         should be added to the above eventNames array.
 602     */
 603     wxASSERT_MSG(index >= 0 && (size_t)index < WXSIZEOF(eventNames),
 604                  wxT("Unknown slider event") );
 605
 606
 607     static int s_numSliderEvents = 0;
 608
 609     wxLogMessage(wxT("Slider event #%d: %s (pos = %d, int value = %ld)"),
 610                  s_numSliderEvents++,
 611                  eventNames[index],
 612                  event.GetPosition(),
 613                  event.GetInt());
 614 }
 615
 616 #endif // wxUSE_SLIDER