samples/widgets/bmpcombobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Program:     wxWidgets Widgets Sample
   3 // Name:        bmpcombobox.cpp
   4 // Purpose:     Part of the widgets sample showing wxBitmapComboBox
   5 // Author:      Jaakko Salli
   6 // Created:     Sep-01-2006
   7 // Id:          $Id$
   8 // Copyright:   (c) 2006 Jaakko Salli
   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_BITMAPCOMBOBOX
  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/combobox.h"
  37     #include "wx/radiobox.h"
  38     #include "wx/statbox.h"
  39     #include "wx/textctrl.h"
  40     #include "wx/filedlg.h"
  41 #endif
  42
  43 #include "wx/stattext.h"
  44 #include "wx/dc.h"
  45 #include "wx/dcmemory.h"
  46 #include "wx/sizer.h"
  47 #include "wx/icon.h"
  48 #include "wx/dir.h"
  49 #include "wx/msgdlg.h"
  50 #include "wx/filename.h"
  51 #include "wx/image.h"
  52 #include "wx/imaglist.h"
  53 #include "wx/bmpcbox.h"
  54
  55 #include "itemcontainer.h"
  56 #include "widgets.h"
  57
  58 #include "icons/bmpcombobox.xpm"
  59
  60 // Images loaded from file are reduced this width and height, if larger
  61 #define IMG_SIZE_TRUNC  256
  62
  63
  64 // ----------------------------------------------------------------------------
  65 // constants
  66 // ----------------------------------------------------------------------------
  67
  68 // control ids
  69 enum
  70 {
  71     BitmapComboBoxPage_Reset = wxID_HIGHEST,
  72     BitmapComboBoxPage_Insert,
  73     BitmapComboBoxPage_InsertText,
  74     BitmapComboBoxPage_ChangeHeight,
  75     BitmapComboBoxPage_LoadFromFile,
  76     BitmapComboBoxPage_SetFromFile,
  77     BitmapComboBoxPage_AddWidgetIcons,
  78     BitmapComboBoxPage_AddSeveralWithImages,
  79     BitmapComboBoxPage_AddSeveral,
  80     BitmapComboBoxPage_AddMany,
  81     BitmapComboBoxPage_Clear,
  82     BitmapComboBoxPage_Change,
  83     BitmapComboBoxPage_Delete,
  84     BitmapComboBoxPage_DeleteText,
  85     BitmapComboBoxPage_DeleteSel,
  86     BitmapComboBoxPage_Combo,
  87     BitmapComboBoxPage_ContainerTests
  88 };
  89
  90
  91 // ----------------------------------------------------------------------------
  92 // BitmapComboBoxWidgetsPage
  93 // ----------------------------------------------------------------------------
  94
  95 class BitmapComboBoxWidgetsPage : public ItemContainerWidgetsPage
  96 {
  97 public:
  98     BitmapComboBoxWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
  99
 100     virtual wxControl *GetWidget() const { return m_combobox; }
 101     virtual wxItemContainer* GetContainer() const { return m_combobox; }
 102     virtual void RecreateWidget() { CreateCombo(); }
 103
 104     // lazy creation of the content
 105     virtual void CreateContent();
 106
 107 protected:
 108     // event handlers
 109     void OnButtonReset(wxCommandEvent& event);
 110     void OnButtonChange(wxCommandEvent& event);
 111     void OnButtonDelete(wxCommandEvent& event);
 112     void OnButtonDeleteSel(wxCommandEvent& event);
 113     void OnButtonClear(wxCommandEvent& event);
 114     void OnButtonInsert(wxCommandEvent &event);
 115     void OnTextChangeHeight(wxCommandEvent& event);
 116     void OnButtonLoadFromFile(wxCommandEvent& event);
 117     void OnButtonSetFromFile(wxCommandEvent& event);
 118     void OnButtonAddSeveral(wxCommandEvent& event);
 119     void OnButtonAddSeveralWithImages(wxCommandEvent& event);
 120     void OnButtonAddWidgetIcons(wxCommandEvent& event);
 121     void OnButtonAddMany(wxCommandEvent& event);
 122
 123     void OnComboBox(wxCommandEvent& event);
 124     void OnComboText(wxCommandEvent& event);
 125
 126     void OnCheckOrRadioBox(wxCommandEvent& event);
 127
 128     void OnTextPopupWidth(wxCommandEvent& event);
 129     void OnTextPopupHeight(wxCommandEvent& event);
 130     void OnTextButtonAll(wxCommandEvent& event);
 131
 132     void OnUpdateUIInsert(wxUpdateUIEvent& event);
 133     void OnUpdateUIAddSeveral(wxUpdateUIEvent& event);
 134     void OnUpdateUIAddSeveralWithImages(wxUpdateUIEvent& event);
 135     void OnUpdateUIClearButton(wxUpdateUIEvent& event);
 136     void OnUpdateUIDeleteButton(wxUpdateUIEvent& event);
 137     void OnUpdateUIItemManipulator(wxUpdateUIEvent& event);
 138     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
 139
 140     // reset the bmpcombobox parameters
 141     void Reset();
 142
 143     // (re)create the bmpcombobox
 144     void CreateCombo();
 145
 146     // helpers for creating bitmaps
 147     wxBitmap CreateBitmap(const wxColour& colour);
 148     wxBitmap CreateRandomBitmap(wxString* pStr);
 149     wxBitmap LoadBitmap(const wxString& filepath);
 150     wxBitmap QueryBitmap(wxString* pStr);
 151
 152     void LoadWidgetImages( wxArrayString* strings, wxImageList* images );
 153
 154     wxSizer *CreateSizerWithSmallTextAndLabel(const wxString& label,
 155                                               wxWindowID id,
 156                                               wxTextCtrl **ppText);
 157
 158 #if wxUSE_IMAGE
 159     void RescaleImage(wxImage& image, int w, int h);
 160 #endif
 161
 162     // the controls
 163     // ------------
 164
 165     // the checkboxes for styles
 166     wxCheckBox *m_chkSort,
 167                *m_chkReadonly;
 168
 169     // the combobox itself and the sizer it is in
 170     wxBitmapComboBox *m_combobox;
 171     wxSizer *m_sizerCombo;
 172
 173     // the text entries for "Add/change string" and "Delete" buttons
 174     wxTextCtrl *m_textInsert,
 175                *m_textChangeHeight,
 176                *m_textChange,
 177                *m_textDelete;
 178
 179 private:
 180     DECLARE_EVENT_TABLE()
 181     DECLARE_WIDGETS_PAGE(BitmapComboBoxWidgetsPage)
 182 };
 183
 184 // ----------------------------------------------------------------------------
 185 // event tables
 186 // ----------------------------------------------------------------------------
 187
 188 BEGIN_EVENT_TABLE(BitmapComboBoxWidgetsPage, WidgetsPage)
 189     EVT_BUTTON(BitmapComboBoxPage_Reset, BitmapComboBoxWidgetsPage::OnButtonReset)
 190     EVT_BUTTON(BitmapComboBoxPage_Change, BitmapComboBoxWidgetsPage::OnButtonChange)
 191     EVT_BUTTON(BitmapComboBoxPage_Delete, BitmapComboBoxWidgetsPage::OnButtonDelete)
 192     EVT_BUTTON(BitmapComboBoxPage_DeleteSel, BitmapComboBoxWidgetsPage::OnButtonDeleteSel)
 193     EVT_BUTTON(BitmapComboBoxPage_Clear, BitmapComboBoxWidgetsPage::OnButtonClear)
 194     EVT_BUTTON(BitmapComboBoxPage_Insert, BitmapComboBoxWidgetsPage::OnButtonInsert)
 195     EVT_BUTTON(BitmapComboBoxPage_AddSeveral, BitmapComboBoxWidgetsPage::OnButtonAddSeveral)
 196     EVT_BUTTON(BitmapComboBoxPage_AddSeveralWithImages, BitmapComboBoxWidgetsPage::OnButtonAddSeveralWithImages)
 197     EVT_BUTTON(BitmapComboBoxPage_AddWidgetIcons, BitmapComboBoxWidgetsPage::OnButtonAddWidgetIcons)
 198     EVT_BUTTON(BitmapComboBoxPage_AddMany, BitmapComboBoxWidgetsPage::OnButtonAddMany)
 199     EVT_BUTTON(BitmapComboBoxPage_LoadFromFile, BitmapComboBoxWidgetsPage::OnButtonLoadFromFile)
 200     EVT_BUTTON(BitmapComboBoxPage_SetFromFile, BitmapComboBoxWidgetsPage::OnButtonSetFromFile)
 201     EVT_BUTTON(BitmapComboBoxPage_ContainerTests, ItemContainerWidgetsPage::OnButtonTestItemContainer)
 202
 203     EVT_TEXT_ENTER(BitmapComboBoxPage_InsertText, BitmapComboBoxWidgetsPage::OnButtonInsert)
 204     EVT_TEXT(BitmapComboBoxPage_ChangeHeight, BitmapComboBoxWidgetsPage::OnTextChangeHeight)
 205     EVT_TEXT_ENTER(BitmapComboBoxPage_DeleteText, BitmapComboBoxWidgetsPage::OnButtonDelete)
 206
 207     EVT_UPDATE_UI(BitmapComboBoxPage_Reset, BitmapComboBoxWidgetsPage::OnUpdateUIResetButton)
 208     EVT_UPDATE_UI(BitmapComboBoxPage_Insert, BitmapComboBoxWidgetsPage::OnUpdateUIInsert)
 209     EVT_UPDATE_UI(BitmapComboBoxPage_LoadFromFile, BitmapComboBoxWidgetsPage::OnUpdateUIInsert)
 210     EVT_UPDATE_UI(BitmapComboBoxPage_AddSeveral, BitmapComboBoxWidgetsPage::OnUpdateUIAddSeveral)
 211     EVT_UPDATE_UI(BitmapComboBoxPage_AddSeveralWithImages, BitmapComboBoxWidgetsPage::OnUpdateUIAddSeveralWithImages)
 212     EVT_UPDATE_UI(BitmapComboBoxPage_Clear, BitmapComboBoxWidgetsPage::OnUpdateUIClearButton)
 213     EVT_UPDATE_UI(BitmapComboBoxPage_DeleteText, BitmapComboBoxWidgetsPage::OnUpdateUIClearButton)
 214     EVT_UPDATE_UI(BitmapComboBoxPage_Delete, BitmapComboBoxWidgetsPage::OnUpdateUIDeleteButton)
 215     EVT_UPDATE_UI(BitmapComboBoxPage_Change, BitmapComboBoxWidgetsPage::OnUpdateUIItemManipulator)
 216     EVT_UPDATE_UI(BitmapComboBoxPage_SetFromFile, BitmapComboBoxWidgetsPage::OnUpdateUIItemManipulator)
 217     EVT_UPDATE_UI(BitmapComboBoxPage_DeleteSel, BitmapComboBoxWidgetsPage::OnUpdateUIItemManipulator)
 218
 219     EVT_COMBOBOX(BitmapComboBoxPage_Combo, BitmapComboBoxWidgetsPage::OnComboBox)
 220     EVT_TEXT(BitmapComboBoxPage_Combo, BitmapComboBoxWidgetsPage::OnComboText)
 221     EVT_TEXT_ENTER(BitmapComboBoxPage_Combo, BitmapComboBoxWidgetsPage::OnComboText)
 222
 223     EVT_CHECKBOX(wxID_ANY, BitmapComboBoxWidgetsPage::OnCheckOrRadioBox)
 224     EVT_RADIOBOX(wxID_ANY, BitmapComboBoxWidgetsPage::OnCheckOrRadioBox)
 225 END_EVENT_TABLE()
 226
 227 // ============================================================================
 228 // implementation
 229 // ============================================================================
 230
 231
 232
 233 IMPLEMENT_WIDGETS_PAGE(BitmapComboBoxWidgetsPage, _T("BitmapCombobox"),
 234                        GENERIC_CTRLS | WITH_ITEMS_CTRLS | COMBO_CTRLS
 235                        );
 236
 237
 238 BitmapComboBoxWidgetsPage::BitmapComboBoxWidgetsPage(WidgetsBookCtrl *book,
 239                                              wxImageList *imaglist)
 240                   : ItemContainerWidgetsPage(book, imaglist, bmpcombobox_xpm)
 241 {
 242     // init everything
 243     m_chkSort =
 244     m_chkReadonly = (wxCheckBox *)NULL;
 245
 246     m_combobox = (wxBitmapComboBox *)NULL;
 247     m_sizerCombo = (wxSizer *)NULL;
 248 }
 249
 250 // create a sizer containing a label and a small text ctrl
 251 wxSizer *BitmapComboBoxWidgetsPage::CreateSizerWithSmallTextAndLabel(const wxString& label,
 252                                                                     wxWindowID id,
 253                                                                     wxTextCtrl **ppText)
 254 {
 255     wxControl* control = new wxStaticText(this, wxID_ANY, label);
 256     wxSizer *sizerRow = new wxBoxSizer(wxHORIZONTAL);
 257     wxTextCtrl *text = new wxTextCtrl(this, id, wxEmptyString,
 258         wxDefaultPosition, wxSize(50,wxDefaultCoord), wxTE_PROCESS_ENTER);
 259
 260     sizerRow->Add(control, 0, wxRIGHT | wxALIGN_CENTRE_VERTICAL, 5);
 261     sizerRow->Add(text, 1, wxFIXED_MINSIZE | wxLEFT | wxALIGN_CENTRE_VERTICAL, 5);
 262
 263     if ( ppText )
 264         *ppText = text;
 265
 266     return sizerRow;
 267 }
 268
 269 void BitmapComboBoxWidgetsPage::CreateContent()
 270 {
 271     /*
 272        What we create here is a frame having 3 panes: style pane is the
 273        leftmost one, in the middle the pane with buttons allowing to perform
 274        miscellaneous combobox operations and the pane containing the combobox
 275        itself to the right
 276     */
 277     //wxTextCtrl *text;
 278     wxSizer *sizerRow;
 279
 280     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 281
 282     wxSizer *sizerLeft = new wxBoxSizer(wxVERTICAL);
 283
 284     // left pane - style box
 285     wxStaticBox *box = new wxStaticBox(this, wxID_ANY, _T("&Set style"));
 286
 287     wxSizer *sizerStyle = new wxStaticBoxSizer(box, wxVERTICAL);
 288
 289     m_chkSort = CreateCheckBoxAndAddToSizer(sizerStyle, _T("&Sort items"));
 290     m_chkReadonly = CreateCheckBoxAndAddToSizer(sizerStyle, _T("&Read only"));
 291
 292     wxButton *btn = new wxButton(this, BitmapComboBoxPage_Reset, _T("&Reset"));
 293     sizerStyle->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 3);
 294
 295     sizerLeft->Add(sizerStyle, 0, wxGROW | wxALIGN_CENTRE_HORIZONTAL);
 296
 297     // left pane - other options box
 298     box = new wxStaticBox(this, wxID_ANY, _T("Demo options"));
 299
 300     wxSizer *sizerOptions = new wxStaticBoxSizer(box, wxVERTICAL);
 301
 302     sizerRow = CreateSizerWithSmallTextAndLabel(_T("Control &height:"),
 303                                                 BitmapComboBoxPage_ChangeHeight,
 304                                                 &m_textChangeHeight);
 305     m_textChangeHeight->SetSize(20, wxDefaultCoord);
 306     sizerOptions->Add(sizerRow, 0, wxALL | wxFIXED_MINSIZE /*| wxGROW*/, 5);
 307
 308     sizerLeft->Add(sizerOptions, 0, wxGROW | wxALIGN_CENTRE_HORIZONTAL | wxTOP, 2);
 309
 310     // middle pane
 311     wxStaticBox *box2 = new wxStaticBox(this, wxID_ANY,
 312         _T("&Change wxBitmapComboBox contents"));
 313     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 314
 315     btn = new wxButton(this, BitmapComboBoxPage_ContainerTests, _T("Run &tests"));
 316     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 317
 318 #if wxUSE_IMAGE
 319     btn = new wxButton(this, BitmapComboBoxPage_AddWidgetIcons, _T("Add &widget icons"));
 320     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 321
 322     btn = new wxButton(this, BitmapComboBoxPage_LoadFromFile, _T("Insert image from &file"));
 323     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 324
 325     btn = new wxButton(this, BitmapComboBoxPage_SetFromFile, _T("&Set image from file"));
 326     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 327 #endif
 328
 329     btn = new wxButton(this, BitmapComboBoxPage_AddSeveralWithImages, _T("A&ppend a few strings with images"));
 330     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 331
 332     btn = new wxButton(this, BitmapComboBoxPage_AddSeveral, _T("Append a &few strings"));
 333     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 334
 335     btn = new wxButton(this, BitmapComboBoxPage_AddMany, _T("Append &many strings"));
 336     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 337
 338     sizerRow = CreateSizerWithTextAndButton(BitmapComboBoxPage_Delete,
 339                                             _T("&Delete this item"),
 340                                             BitmapComboBoxPage_DeleteText,
 341                                             &m_textDelete);
 342     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 343
 344     btn = new wxButton(this, BitmapComboBoxPage_DeleteSel, _T("Delete &selection"));
 345     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 346
 347     btn = new wxButton(this, BitmapComboBoxPage_Clear, _T("&Clear"));
 348     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 349
 350 #if wxUSE_IMAGE
 351     wxInitAllImageHandlers();
 352 #endif
 353
 354     // right pane
 355     wxSizer *sizerRight = new wxBoxSizer(wxVERTICAL);
 356     m_combobox = new wxBitmapComboBox();
 357     m_combobox->Create(this, BitmapComboBoxPage_Combo, wxEmptyString,
 358                        wxDefaultPosition, wxDefaultSize,
 359                        0, NULL,
 360                        wxCB_READONLY);
 361
 362 #if defined(wxGENERIC_BITMAPCOMBOBOX)
 363     // This will sure make the list look nicer when larger images are used.
 364     m_combobox->SetPopupMaxHeight(600);
 365 #endif
 366
 367     sizerRight->Add(m_combobox, 0, wxGROW | wxALL, 5);
 368     sizerRight->SetMinSize(150, 0);
 369     m_sizerCombo = sizerRight; // save it to modify it later
 370
 371     // the 3 panes panes compose the window
 372     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 373     sizerTop->Add(sizerMiddle, 5, wxGROW | wxALL, 10);
 374     sizerTop->Add(sizerRight, 4, wxGROW | (wxALL & ~wxRIGHT), 10);
 375
 376     // final initializations
 377     Reset();
 378
 379     SetSizer(sizerTop);
 380 }
 381
 382 // ----------------------------------------------------------------------------
 383 // operations
 384 // ----------------------------------------------------------------------------
 385
 386 void BitmapComboBoxWidgetsPage::Reset()
 387 {
 388     m_chkSort->SetValue(false);
 389     m_chkReadonly->SetValue(true);
 390 }
 391
 392 void BitmapComboBoxWidgetsPage::CreateCombo()
 393 {
 394     int flags = ms_defaultFlags;
 395
 396     if ( m_chkSort->GetValue() )
 397         flags |= wxCB_SORT;
 398     if ( m_chkReadonly->GetValue() )
 399         flags |= wxCB_READONLY;
 400
 401     wxArrayString items;
 402     wxArrayPtrVoid bitmaps;
 403     if ( m_combobox )
 404     {
 405         unsigned int count = m_combobox->GetCount();
 406         for ( unsigned int n = 0; n < count; n++ )
 407         {
 408             items.Add(m_combobox->GetString(n));
 409             bitmaps.Add(new wxBitmap(m_combobox->GetItemBitmap(n)));
 410         }
 411
 412         m_sizerCombo->Detach( m_combobox );
 413         delete m_combobox;
 414     }
 415
 416     m_combobox = new wxBitmapComboBox();
 417     m_combobox->Create(this, BitmapComboBoxPage_Combo, wxEmptyString,
 418                        wxDefaultPosition, wxDefaultSize,
 419                        0, NULL,
 420                        flags);
 421
 422 #if defined(wxGENERIC_BITMAPCOMBOBOX)
 423     // This will sure make the list look nicer when larger images are used.
 424     m_combobox->SetPopupMaxHeight(600);
 425 #endif
 426
 427     unsigned int count = items.GetCount();
 428     for ( unsigned int n = 0; n < count; n++ )
 429     {
 430         wxBitmap* bmp = (wxBitmap*) bitmaps[n];
 431         m_combobox->Append(items[n], *bmp);
 432         delete bmp;
 433     }
 434
 435     m_sizerCombo->Add(m_combobox, 0, wxGROW | wxALL, 5);
 436     m_sizerCombo->Layout();
 437
 438     // Allow changing height inorder to demonstrate flexible
 439     // size of image "thumbnail" painted in the control itself.
 440     long h = 0;
 441     m_textChangeHeight->GetValue().ToLong(&h);
 442     if ( h >= 5 )
 443         m_combobox->SetSize(wxDefaultCoord, h);
 444 }
 445
 446 // ----------------------------------------------------------------------------
 447 // event handlers
 448 // ----------------------------------------------------------------------------
 449
 450 void BitmapComboBoxWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 451 {
 452     Reset();
 453
 454     CreateCombo();
 455 }
 456
 457 void BitmapComboBoxWidgetsPage::OnButtonChange(wxCommandEvent& WXUNUSED(event))
 458 {
 459     int sel = m_combobox->GetSelection();
 460     if ( sel != wxNOT_FOUND )
 461     {
 462 #ifndef __WXGTK__
 463         m_combobox->SetString(sel, m_textChange->GetValue());
 464 #else
 465         wxLogMessage(_T("Not implemented in wxGTK"));
 466 #endif
 467     }
 468 }
 469
 470 void BitmapComboBoxWidgetsPage::OnButtonDelete(wxCommandEvent& WXUNUSED(event))
 471 {
 472     unsigned long n;
 473     if ( !m_textDelete->GetValue().ToULong(&n) ||
 474             (n >= m_combobox->GetCount()) )
 475     {
 476         return;
 477     }
 478
 479     m_combobox->Delete(n);
 480 }
 481
 482 void BitmapComboBoxWidgetsPage::OnButtonDeleteSel(wxCommandEvent& WXUNUSED(event))
 483 {
 484     int sel = m_combobox->GetSelection();
 485     if ( sel != wxNOT_FOUND )
 486     {
 487         m_combobox->Delete(sel);
 488     }
 489 }
 490
 491 void BitmapComboBoxWidgetsPage::OnButtonClear(wxCommandEvent& WXUNUSED(event))
 492 {
 493     m_combobox->Clear();
 494 }
 495
 496 void BitmapComboBoxWidgetsPage::OnButtonInsert(wxCommandEvent& WXUNUSED(event))
 497 {
 498     static unsigned int s_item = 0;
 499
 500     wxString s = m_textInsert->GetValue();
 501     if ( !m_textInsert->IsModified() )
 502     {
 503         // update the default string
 504         m_textInsert->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 505     }
 506
 507     int sel = m_combobox->GetSelection();
 508     if ( sel == wxNOT_FOUND )
 509         sel = m_combobox->GetCount();
 510
 511     m_combobox->Insert(s, wxNullBitmap, m_combobox->GetSelection());
 512 }
 513
 514 void BitmapComboBoxWidgetsPage::OnTextChangeHeight(wxCommandEvent& WXUNUSED(event))
 515 {
 516     long h = 0;
 517     m_textChangeHeight->GetValue().ToLong(&h);
 518     if ( h < 5 )
 519         return;
 520     m_combobox->SetSize(wxDefaultCoord, h);
 521 }
 522
 523 void BitmapComboBoxWidgetsPage::OnButtonLoadFromFile(wxCommandEvent& WXUNUSED(event))
 524 {
 525     wxString s;
 526     int sel = m_combobox->GetSelection();
 527     if ( sel == wxNOT_FOUND )
 528         sel = m_combobox->GetCount();
 529
 530     m_combobox->Insert(s, QueryBitmap(&s), sel);
 531 }
 532
 533 void BitmapComboBoxWidgetsPage::OnButtonSetFromFile(wxCommandEvent& WXUNUSED(event))
 534 {
 535     m_combobox->SetItemBitmap(m_combobox->GetSelection(), QueryBitmap(NULL));
 536 }
 537
 538 void BitmapComboBoxWidgetsPage::OnButtonAddMany(wxCommandEvent& WXUNUSED(event))
 539 {
 540     // "many" means 1000 here
 541     for ( unsigned int n = 0; n < 1000; n++ )
 542     {
 543         m_combobox->Append(wxString::Format(_T("item #%u"), n));
 544     }
 545 }
 546
 547 void BitmapComboBoxWidgetsPage::OnButtonAddSeveral(wxCommandEvent& WXUNUSED(event))
 548 {
 549     m_combobox->Append(_T("First"));
 550     m_combobox->Append(_T("another one"));
 551     m_combobox->Append(_T("and the last (very very very very very very very very very very long) one"));
 552 }
 553
 554 void BitmapComboBoxWidgetsPage::OnButtonAddSeveralWithImages(wxCommandEvent& WXUNUSED(event))
 555 {
 556     int i;
 557
 558     for ( i=0; i<4; i++ )
 559     {
 560         wxString s;
 561         wxBitmap bmp = CreateRandomBitmap(&s);
 562         m_combobox->Append(s, bmp);
 563     }
 564 }
 565
 566 #if wxUSE_IMAGE
 567 void BitmapComboBoxWidgetsPage::RescaleImage(wxImage& image, int w, int h)
 568 {
 569     if ( image.GetWidth() == w && image.GetHeight() == h )
 570         return;
 571
 572     if ( w <= 0 || h <= 0 )
 573         return;
 574
 575     static bool isFirstScale = true;
 576
 577     if ( isFirstScale && m_combobox->GetCount() > 0 )
 578     {
 579         wxMessageBox( wxT("wxBitmapComboBox normally only supports images of one size. ")
 580                       wxT("However, for demonstration purposes, loaded bitmaps are scaled to fit ")
 581                       wxT("using wxImage::Rescale."),
 582                       wxT("Notice"),
 583                       wxOK,
 584                       this );
 585
 586         isFirstScale = false;
 587     }
 588
 589     image.Rescale(w, h);
 590 }
 591 #endif
 592
 593 void BitmapComboBoxWidgetsPage::LoadWidgetImages( wxArrayString* strings, wxImageList* images )
 594 {
 595     wxFileName fn;
 596     fn.AssignCwd();
 597     fn.AppendDir(wxT("icons"));
 598
 599     wxSetCursor(*wxHOURGLASS_CURSOR);
 600
 601     if ( !wxDir::Exists(fn.GetFullPath()) ||
 602          !wxDir::GetAllFiles(fn.GetFullPath(),strings,wxT("*.xpm")) )
 603     {
 604         fn.RemoveLastDir();
 605         fn.RemoveLastDir();
 606         fn.AppendDir(wxT("icons"));
 607         if ( !wxDir::Exists(fn.GetFullPath()) ||
 608              !wxDir::GetAllFiles(fn.GetFullPath(),strings,wxT("*.xpm")) )
 609         {
 610             // Try ../../../samples/widgets/icons
 611             fn.AssignCwd();
 612             fn.RemoveLastDir();
 613             fn.RemoveLastDir();
 614             fn.RemoveLastDir();
 615             fn.AppendDir(wxT("samples"));
 616             fn.AppendDir(wxT("widgets"));
 617             fn.AppendDir(wxT("icons"));
 618             if ( !wxDir::Exists(fn.GetFullPath()) ||
 619                  !wxDir::GetAllFiles(fn.GetFullPath(),strings,wxT("*.xpm")) )
 620             {
 621                 wxLogWarning(wxT("Could not load widget icons."));
 622                 wxSetCursor(*wxSTANDARD_CURSOR);
 623                 return;
 624             }
 625         }
 626     }
 627
 628     unsigned int i;
 629
 630     // Get size of existing images in list
 631     wxSize foundSize = m_combobox->GetBitmapSize();
 632
 633     for ( i=0; i<strings->size(); i++ )
 634     {
 635         fn.SetFullName((*strings)[i]);
 636         wxString name =fn.GetName();
 637
 638         // Handle few exceptions
 639         if ( name == wxT("bmpbtn") )
 640         {
 641             strings->RemoveAt(i);
 642             i--;
 643         }
 644         else
 645         {
 646 #if wxUSE_IMAGE
 647             wxASSERT(fn.FileExists());
 648             wxImage image(fn.GetFullPath());
 649             wxASSERT(image.Ok());
 650             RescaleImage(image, foundSize.x, foundSize.y);
 651             wxBitmap bmp(image);
 652             wxASSERT( bmp.Ok() );
 653 #else
 654             wxBitmap bmp(wxNullBitmap);
 655 #endif
 656             images->Add(bmp);
 657             (*strings)[i] = name;
 658         }
 659     }
 660
 661     wxSetCursor(*wxSTANDARD_CURSOR);
 662 }
 663
 664 void BitmapComboBoxWidgetsPage::OnButtonAddWidgetIcons(wxCommandEvent& WXUNUSED(event))
 665 {
 666     wxArrayString strings;
 667
 668     wxSize sz = m_combobox->GetBitmapSize();
 669     if ( sz.x <= 0 )
 670     {
 671         sz.x = 32;
 672         sz.y = 32;
 673     }
 674
 675     wxImageList images(sz.x, sz.y);
 676
 677     LoadWidgetImages(&strings, &images);
 678
 679     unsigned int i;
 680
 681     for ( i=0; i<strings.size(); i++ )
 682     {
 683         m_combobox->Append(strings[i], images.GetBitmap(i));
 684     }
 685 }
 686
 687 void BitmapComboBoxWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 688 {
 689     if (m_combobox)
 690         event.Enable( m_chkSort->GetValue() || m_chkReadonly->GetValue() );
 691 }
 692
 693 void BitmapComboBoxWidgetsPage::OnUpdateUIInsert(wxUpdateUIEvent& event)
 694 {
 695     if (m_combobox)
 696     {
 697         bool enable = !(m_combobox->GetWindowStyle() & wxCB_SORT);
 698
 699         event.Enable(enable);
 700     }
 701 }
 702
 703 void BitmapComboBoxWidgetsPage::OnUpdateUIDeleteButton(wxUpdateUIEvent& event)
 704 {
 705     if (m_combobox)
 706     {
 707       unsigned long n;
 708       event.Enable(m_textDelete->GetValue().ToULong(&n) &&
 709         (n < (unsigned)m_combobox->GetCount()));
 710     }
 711 }
 712
 713 void BitmapComboBoxWidgetsPage::OnUpdateUIItemManipulator(wxUpdateUIEvent& event)
 714 {
 715     if (m_combobox)
 716         event.Enable(m_combobox->GetSelection() != wxNOT_FOUND);
 717 }
 718
 719 void BitmapComboBoxWidgetsPage::OnUpdateUIClearButton(wxUpdateUIEvent& event)
 720 {
 721     if (m_combobox)
 722         event.Enable(m_combobox->GetCount() != 0);
 723 }
 724
 725 void BitmapComboBoxWidgetsPage::OnUpdateUIAddSeveral(wxUpdateUIEvent& event)
 726 {
 727     if (m_combobox)
 728         event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
 729 }
 730
 731 void BitmapComboBoxWidgetsPage::OnUpdateUIAddSeveralWithImages(wxUpdateUIEvent& event)
 732 {
 733     if (m_combobox)
 734         event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
 735 }
 736
 737 void BitmapComboBoxWidgetsPage::OnComboText(wxCommandEvent& event)
 738 {
 739     if (!m_combobox)
 740         return;
 741
 742     wxString s = event.GetString();
 743
 744     wxASSERT_MSG( s == m_combobox->GetValue(),
 745                   _T("event and combobox values should be the same") );
 746
 747     if (event.GetEventType() == wxEVT_COMMAND_TEXT_ENTER)
 748         wxLogMessage(_T("BitmapCombobox enter pressed (now '%s')"), s.c_str());
 749     else
 750         wxLogMessage(_T("BitmapCombobox text changed (now '%s')"), s.c_str());
 751 }
 752
 753 void BitmapComboBoxWidgetsPage::OnComboBox(wxCommandEvent& event)
 754 {
 755     long sel = event.GetInt();
 756     m_textDelete->SetValue(wxString::Format(_T("%ld"), sel));
 757
 758     wxLogMessage(_T("BitmapCombobox item %ld selected"), sel);
 759
 760     wxLogMessage(_T("BitmapCombobox GetValue(): %s"), m_combobox->GetValue().c_str() );
 761 }
 762
 763 void BitmapComboBoxWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& WXUNUSED(event))
 764 {
 765     CreateCombo();
 766 }
 767
 768 #if wxUSE_IMAGE
 769 wxBitmap BitmapComboBoxWidgetsPage::LoadBitmap(const wxString& filepath)
 770 {
 771     // Get size of existing images in list
 772     wxSize foundSize = m_combobox->GetBitmapSize();
 773
 774     // Have some reasonable maximum size
 775     if ( foundSize.x <= 0 )
 776     {
 777         foundSize.x = IMG_SIZE_TRUNC;
 778         foundSize.y = IMG_SIZE_TRUNC;
 779     }
 780
 781     wxImage image(filepath);
 782     if ( image.Ok() )
 783     {
 784         // Rescale very large images
 785         int ow = image.GetWidth();
 786         int oh = image.GetHeight();
 787
 788         if ( foundSize.x > 0 &&
 789              (ow != foundSize.x || oh != foundSize.y) )
 790         {
 791             int w = ow;
 792             if ( w > foundSize.x )
 793                 w = foundSize.x;
 794             int h = oh;
 795             if ( h > foundSize.y )
 796                 h = foundSize.y;
 797
 798             RescaleImage(image, w, h);
 799         }
 800
 801         return wxBitmap(image);
 802     }
 803
 804     return wxNullBitmap;
 805 }
 806 #else
 807 wxBitmap BitmapComboBoxWidgetsPage::LoadBitmap(const wxString& WXUNUSED(filepath))
 808 {
 809     return wxNullBitmap;
 810 }
 811 #endif
 812
 813 wxBitmap BitmapComboBoxWidgetsPage::QueryBitmap(wxString* pStr)
 814 {
 815     wxString filepath = wxFileSelector(wxT("Choose image file"),
 816                                        wxEmptyString,
 817                                        wxEmptyString,
 818                                        wxEmptyString,
 819                                        wxT("*.*"),
 820                                        wxFD_OPEN | wxFD_FILE_MUST_EXIST,
 821                                        this);
 822
 823     wxBitmap bitmap;
 824
 825     ::wxSetCursor( *wxHOURGLASS_CURSOR );
 826
 827     if ( filepath.length() )
 828     {
 829         if ( pStr )
 830         {
 831             *pStr = wxFileName(filepath).GetName();
 832         }
 833
 834         bitmap = LoadBitmap(filepath);
 835     }
 836
 837     wxLogDebug(wxT("%i, %i"),bitmap.GetWidth(), bitmap.GetHeight());
 838
 839     ::wxSetCursor( *wxSTANDARD_CURSOR );
 840
 841     return bitmap;
 842 }
 843
 844 wxBitmap BitmapComboBoxWidgetsPage::CreateBitmap(const wxColour& colour)
 845 {
 846     int ch = m_combobox->GetBitmapSize().y;
 847     int h0 = ch - 5;
 848
 849     long w = ch;
 850     long h = ch;
 851
 852     if ( w <= 0 )
 853         w = h0 - 1;
 854     if ( h <= 0 )
 855         h = h0;
 856     if ( h > ch )
 857         h = ch;
 858
 859     wxMemoryDC dc;
 860     wxBitmap bmp(w,h);
 861     dc.SelectObject(bmp);
 862
 863     // Draw transparent background
 864     wxColour magic(255,0,255);
 865     wxBrush magicBrush(magic);
 866     dc.SetBrush(magicBrush);
 867     dc.SetPen(*wxTRANSPARENT_PEN);
 868     dc.DrawRectangle(0,0,bmp.GetWidth(),bmp.GetHeight());
 869
 870     // Draw image content
 871     dc.SetBrush(wxBrush(colour));
 872     dc.DrawCircle(h/2,h/2+1,(h/2));
 873
 874     dc.SelectObject(wxNullBitmap);
 875
 876     // Finalize transparency with a mask
 877     wxMask *mask = new wxMask(bmp, magic);
 878     bmp.SetMask(mask);
 879
 880     return bmp;
 881 }
 882
 883 wxBitmap BitmapComboBoxWidgetsPage::CreateRandomBitmap( wxString* pStr )
 884 {
 885     int i = rand() % 6;
 886     const wxChar* str = wxT("");
 887     wxBitmap bmp;
 888
 889     if ( i == 0 )
 890     {
 891         str = wxT("Red Circle");
 892         bmp = CreateBitmap( *wxRED );
 893     }
 894     else if ( i == 1 )
 895     {
 896         str = wxT("Green Circle");
 897         bmp = CreateBitmap( *wxGREEN );
 898     }
 899     else if ( i == 2 )
 900     {
 901         str = wxT("Blue Circle");
 902         bmp = CreateBitmap( *wxBLUE );
 903     }
 904     else if ( i == 3 )
 905     {
 906         str = wxT("Black Circle");
 907         bmp = CreateBitmap( *wxBLACK );
 908     }
 909     else if ( i == 4 )
 910     {
 911         str = wxT("Cyan Circle");
 912         bmp = CreateBitmap( *wxCYAN );
 913     }
 914     else if ( i == 5 )
 915     {
 916         str = wxT("Light Grey Circle");
 917         bmp = CreateBitmap( *wxLIGHT_GREY );
 918     }
 919
 920     if ( pStr )
 921         *pStr = str;
 922
 923     return bmp;
 924 }
 925
 926 #endif //wxUSE_BITMAPCOMBOBOX