samples/widgets/slider.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Program:     wxWindows 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 // for all others, include the necessary headers
  28 #ifndef WX_PRECOMP
  29     #include "wx/log.h"
  30
  31     #include "wx/button.h"
  32     #include "wx/checkbox.h"
  33     #include "wx/radiobox.h"
  34     #include "wx/slider.h"
  35     #include "wx/statbox.h"
  36     #include "wx/textctrl.h"
  37 #endif
  38
  39 #include "wx/sizer.h"
  40
  41 #include "widgets.h"
  42
  43 #include "icons/slider.xpm"
  44
  45 // ----------------------------------------------------------------------------
  46 // constants
  47 // ----------------------------------------------------------------------------
  48
  49 // control ids
  50 enum
  51 {
  52     SliderPage_Reset = 100,
  53     SliderPage_Clear,
  54     SliderPage_SetValue,
  55     SliderPage_SetMinAndMax,
  56     SliderPage_SetTickFreq,
  57     SliderPage_CurValueText,
  58     SliderPage_ValueText,
  59     SliderPage_MinText,
  60     SliderPage_MaxText,
  61     SliderPage_TickFreqText,
  62     SliderPage_OtherSide,
  63     SliderPage_Slider
  64 };
  65
  66 // ----------------------------------------------------------------------------
  67 // SliderWidgetsPage
  68 // ----------------------------------------------------------------------------
  69
  70 class SliderWidgetsPage : public WidgetsPage
  71 {
  72 public:
  73     SliderWidgetsPage(wxNotebook *notebook, wxImageList *imaglist);
  74     virtual ~SliderWidgetsPage();
  75
  76 protected:
  77     // event handlers
  78     void OnButtonReset(wxCommandEvent& event);
  79     void OnButtonClear(wxCommandEvent& event);
  80     void OnButtonSetValue(wxCommandEvent& event);
  81     void OnButtonSetMinAndMax(wxCommandEvent& event);
  82     void OnButtonSetTickFreq(wxCommandEvent& event);
  83
  84     void OnCheckOrRadioBox(wxCommandEvent& event);
  85
  86     void OnSlider(wxCommandEvent& event);
  87
  88     void OnUpdateUIOtherSide(wxUpdateUIEvent& event);
  89     void OnUpdateUIValueButton(wxUpdateUIEvent& event);
  90     void OnUpdateUIMinMaxButton(wxUpdateUIEvent& event);
  91     void OnUpdateUITickFreq(wxUpdateUIEvent& event);
  92
  93     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
  94
  95     void OnUpdateUICurValueText(wxUpdateUIEvent& event);
  96
  97     // reset the slider parameters
  98     void Reset();
  99
 100     // (re)create the slider
 101     void CreateSlider();
 102
 103     // set the tick frequency from the text field value
 104     void DoSetTickFreq();
 105
 106     // is this slider value in range?
 107     bool IsValidValue(int val) const
 108         { return (val >= m_min) && (val <= m_max); }
 109
 110     // the slider range
 111     int m_min, m_max;
 112
 113     // the controls
 114     // ------------
 115
 116     // the check/radio boxes for styles
 117     wxCheckBox *m_chkLabels,
 118                *m_chkOtherSide,
 119                *m_chkVert,
 120                *m_chkTicks;
 121
 122     // the slider itself and the sizer it is in
 123     wxSlider *m_slider;
 124     wxSizer *m_sizerSlider;
 125
 126     // the text entries for set value/range
 127     wxTextCtrl *m_textValue,
 128                *m_textMin,
 129                *m_textMax,
 130                *m_textTickFreq;
 131
 132 private:
 133     DECLARE_EVENT_TABLE();
 134     DECLARE_WIDGETS_PAGE(SliderWidgetsPage);
 135 };
 136
 137 // ----------------------------------------------------------------------------
 138 // event tables
 139 // ----------------------------------------------------------------------------
 140
 141 BEGIN_EVENT_TABLE(SliderWidgetsPage, WidgetsPage)
 142     EVT_BUTTON(SliderPage_Reset, SliderWidgetsPage::OnButtonReset)
 143     EVT_BUTTON(SliderPage_SetValue, SliderWidgetsPage::OnButtonSetValue)
 144     EVT_BUTTON(SliderPage_SetMinAndMax, SliderWidgetsPage::OnButtonSetMinAndMax)
 145     EVT_BUTTON(SliderPage_SetTickFreq, SliderWidgetsPage::OnButtonSetTickFreq)
 146
 147     EVT_UPDATE_UI(SliderPage_OtherSide, SliderWidgetsPage::OnUpdateUIOtherSide)
 148
 149     EVT_UPDATE_UI(SliderPage_SetValue, SliderWidgetsPage::OnUpdateUIValueButton)
 150     EVT_UPDATE_UI(SliderPage_SetMinAndMax, SliderWidgetsPage::OnUpdateUIMinMaxButton)
 151     EVT_UPDATE_UI(SliderPage_SetTickFreq, SliderWidgetsPage::OnUpdateUITickFreq)
 152     EVT_UPDATE_UI(SliderPage_TickFreqText, SliderWidgetsPage::OnUpdateUITickFreq)
 153
 154     EVT_UPDATE_UI(SliderPage_Reset, SliderWidgetsPage::OnUpdateUIResetButton)
 155
 156     EVT_UPDATE_UI(SliderPage_CurValueText, SliderWidgetsPage::OnUpdateUICurValueText)
 157
 158     EVT_SLIDER(SliderPage_Slider, SliderWidgetsPage::OnSlider)
 159
 160     EVT_CHECKBOX(-1, SliderWidgetsPage::OnCheckOrRadioBox)
 161     EVT_RADIOBOX(-1, SliderWidgetsPage::OnCheckOrRadioBox)
 162 END_EVENT_TABLE()
 163
 164 // ============================================================================
 165 // implementation
 166 // ============================================================================
 167
 168 IMPLEMENT_WIDGETS_PAGE(SliderWidgetsPage, _T("Slider"));
 169
 170 SliderWidgetsPage::SliderWidgetsPage(wxNotebook *notebook,
 171                                        wxImageList *imaglist)
 172                   : WidgetsPage(notebook)
 173 {
 174     imaglist->Add(wxBitmap(slider_xpm));
 175
 176     // init everything
 177     m_min = 0;
 178     m_max = 100;
 179
 180     m_chkVert =
 181     m_chkTicks =
 182     m_chkLabels =
 183     m_chkOtherSide = (wxCheckBox *)NULL;
 184
 185     m_slider = (wxSlider *)NULL;
 186     m_sizerSlider = (wxSizer *)NULL;
 187
 188     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 189
 190     // left pane
 191     wxStaticBox *box = new wxStaticBox(this, -1, _T("&Set style"));
 192     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 193
 194     m_chkVert = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Vertical"));
 195     m_chkTicks = CreateCheckBoxAndAddToSizer(sizerLeft, _T("Show &ticks"));
 196     m_chkLabels = CreateCheckBoxAndAddToSizer(sizerLeft, _T("Show &labels"));
 197     m_chkOtherSide = CreateCheckBoxAndAddToSizer
 198                      (
 199                         sizerLeft,
 200                         _T("On &other side"),
 201                         SliderPage_OtherSide
 202                      );
 203
 204     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 205
 206     wxButton *btn = new wxButton(this, SliderPage_Reset, _T("&Reset"));
 207     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 208
 209     // middle pane
 210     wxStaticBox *box2 = new wxStaticBox(this, -1, _T("&Change slider value"));
 211     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 212
 213     wxTextCtrl *text;
 214     wxSizer *sizerRow = CreateSizerWithTextAndLabel(_T("Current value"),
 215                                                     SliderPage_CurValueText,
 216                                                     &text);
 217     text->SetEditable(FALSE);
 218
 219     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 220
 221     sizerRow = CreateSizerWithTextAndButton(SliderPage_SetValue,
 222                                             _T("Set &value"),
 223                                             SliderPage_ValueText,
 224                                             &m_textValue);
 225     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 226
 227     sizerRow = CreateSizerWithTextAndButton(SliderPage_SetMinAndMax,
 228                                             _T("&Min and max"),
 229                                             SliderPage_MinText,
 230                                             &m_textMin);
 231
 232     m_textMax = new wxTextCtrl(this, SliderPage_MaxText, _T(""));
 233     sizerRow->Add(m_textMax, 1, wxLEFT | wxALIGN_CENTRE_VERTICAL, 5);
 234
 235     m_textMin->SetValue(wxString::Format(_T("%lu"), m_min));
 236     m_textMax->SetValue(wxString::Format(_T("%lu"), m_max));
 237
 238     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 239
 240     sizerRow = CreateSizerWithTextAndButton(SliderPage_SetTickFreq,
 241                                             _T("Tick &frequency"),
 242                                             SliderPage_TickFreqText,
 243                                             &m_textTickFreq);
 244
 245     m_textTickFreq->SetValue(_T("10"));
 246
 247     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 248
 249     // right pane
 250     wxSizer *sizerRight = new wxBoxSizer(wxHORIZONTAL);
 251     sizerRight->SetMinSize(250, 0);
 252     m_sizerSlider = sizerRight; // save it to modify it later
 253
 254     Reset();
 255     CreateSlider();
 256
 257     // the 3 panes panes compose the window
 258     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 259     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 260     sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 261
 262     // final initializations
 263     SetAutoLayout(TRUE);
 264     SetSizer(sizerTop);
 265
 266     sizerTop->Fit(this);
 267 }
 268
 269 SliderWidgetsPage::~SliderWidgetsPage()
 270 {
 271 }
 272
 273 // ----------------------------------------------------------------------------
 274 // operations
 275 // ----------------------------------------------------------------------------
 276
 277 void SliderWidgetsPage::Reset()
 278 {
 279     m_chkLabels->SetValue(TRUE);
 280     m_chkTicks->SetValue(FALSE);
 281     m_chkVert->SetValue(FALSE);
 282     m_chkOtherSide->SetValue(FALSE);
 283 }
 284
 285 void SliderWidgetsPage::CreateSlider()
 286 {
 287     int flags = 0;
 288
 289     bool isVert = m_chkVert->GetValue();
 290     if ( isVert )
 291         flags |= wxSL_VERTICAL;
 292     else
 293         flags |= wxSL_HORIZONTAL;
 294
 295     if ( m_chkLabels->GetValue() )
 296     {
 297         flags |= wxSL_LABELS;
 298
 299         if ( m_chkOtherSide->GetValue() )
 300             flags |= isVert ? wxSL_RIGHT : wxSL_BOTTOM;
 301         else
 302             flags |= isVert ? wxSL_LEFT : wxSL_TOP;
 303     }
 304
 305     if ( m_chkTicks->GetValue() )
 306     {
 307         flags |= wxSL_AUTOTICKS;
 308     }
 309
 310     int val = m_min;
 311     if ( m_slider )
 312     {
 313         int valOld = m_slider->GetValue();
 314         if ( !IsValidValue(valOld) )
 315         {
 316             val = valOld;
 317         }
 318
 319         m_sizerSlider->Remove(m_slider);
 320
 321         if ( m_sizerSlider->GetChildren().GetCount() )
 322         {
 323             // we have 2 spacers, remove them too
 324             m_sizerSlider->Remove((int)0);
 325             m_sizerSlider->Remove((int)0);
 326         }
 327
 328         delete m_slider;
 329     }
 330
 331     m_slider = new wxSlider(this, SliderPage_Slider,
 332                             val, m_min, m_max,
 333                             wxDefaultPosition, wxDefaultSize,
 334                             flags);
 335
 336     if ( isVert )
 337     {
 338         m_sizerSlider->Add(0, 0, 1);
 339         m_sizerSlider->Add(m_slider, 0, wxGROW | wxALL, 5);
 340         m_sizerSlider->Add(0, 0, 1);
 341     }
 342     else
 343     {
 344         m_sizerSlider->Add(m_slider, 1, wxCENTRE | wxALL, 5);
 345     }
 346
 347     if ( m_chkTicks->GetValue() )
 348     {
 349         DoSetTickFreq();
 350     }
 351
 352     m_sizerSlider->Layout();
 353 }
 354
 355 void SliderWidgetsPage::DoSetTickFreq()
 356 {
 357     long freq;
 358     if ( !m_textTickFreq->GetValue().ToLong(&freq) )
 359     {
 360         wxLogWarning(_T("Invalid slider tick frequency"));
 361
 362         return;
 363     }
 364
 365     m_slider->SetTickFreq(freq, 0 /* unused */);
 366 }
 367
 368 // ----------------------------------------------------------------------------
 369 // event handlers
 370 // ----------------------------------------------------------------------------
 371
 372 void SliderWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 373 {
 374     Reset();
 375
 376     CreateSlider();
 377 }
 378
 379 void SliderWidgetsPage::OnButtonSetTickFreq(wxCommandEvent& WXUNUSED(event))
 380 {
 381     DoSetTickFreq();
 382 }
 383
 384 void SliderWidgetsPage::OnButtonSetMinAndMax(wxCommandEvent& WXUNUSED(event))
 385 {
 386     long minNew,
 387          maxNew = 0; // init to suppress compiler warning
 388     if ( !m_textMin->GetValue().ToLong(&minNew) ||
 389          !m_textMax->GetValue().ToLong(&maxNew) ||
 390          minNew >= maxNew )
 391     {
 392         wxLogWarning(_T("Invalid min/max values for the slider."));
 393
 394         return;
 395     }
 396
 397     m_min = minNew;
 398     m_max = maxNew;
 399
 400     m_slider->SetRange(minNew, maxNew);
 401 }
 402
 403 void SliderWidgetsPage::OnButtonSetValue(wxCommandEvent& WXUNUSED(event))
 404 {
 405     long val;
 406     if ( !m_textValue->GetValue().ToLong(&val) || !IsValidValue(val) )
 407     {
 408         wxLogWarning(_T("Invalid slider value."));
 409
 410         return;
 411     }
 412
 413     m_slider->SetValue(val);
 414 }
 415
 416 void SliderWidgetsPage::OnUpdateUIValueButton(wxUpdateUIEvent& event)
 417 {
 418     long val;
 419     event.Enable( m_textValue->GetValue().ToLong(&val) && IsValidValue(val) );
 420 }
 421
 422 void SliderWidgetsPage::OnUpdateUITickFreq(wxUpdateUIEvent& event)
 423 {
 424     long freq;
 425     event.Enable( m_chkTicks->GetValue() &&
 426                   m_textTickFreq->GetValue().ToLong(&freq) &&
 427                   (freq > 0) && (freq <= m_max - m_min) );
 428 }
 429
 430 void SliderWidgetsPage::OnUpdateUIMinMaxButton(wxUpdateUIEvent& event)
 431 {
 432     long mn, mx;
 433     event.Enable( m_textMin->GetValue().ToLong(&mn) &&
 434                   m_textMax->GetValue().ToLong(&mx) &&
 435                   mn < mx);
 436 }
 437
 438 void SliderWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 439 {
 440     event.Enable( m_chkVert->GetValue() ||
 441                   !m_chkLabels->GetValue() ||
 442                   m_chkOtherSide->GetValue() ||
 443                   m_chkTicks->GetValue() );
 444 }
 445
 446 void SliderWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& event)
 447 {
 448     CreateSlider();
 449 }
 450
 451 void SliderWidgetsPage::OnUpdateUICurValueText(wxUpdateUIEvent& event)
 452 {
 453     event.SetText( wxString::Format(_T("%d"), m_slider->GetValue()));
 454 }
 455
 456 void SliderWidgetsPage::OnUpdateUIOtherSide(wxUpdateUIEvent& event)
 457 {
 458     event.Enable( m_chkLabels->GetValue() );
 459 }
 460
 461 void SliderWidgetsPage::OnSlider(wxCommandEvent& event)
 462 {
 463     int value = event.GetInt();
 464
 465     wxASSERT_MSG( value == m_slider->GetValue(),
 466                   _T("slider value should be the same") );
 467
 468     wxLogMessage(_T("Slider value changed, now %d"), value);
 469 }
 470