samples/help/demo.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        demo.cpp
   3 // Purpose:     wxHelpController demo
   4 // Author:      Karsten Ballueder
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Karsten Ballueder, Julian Smart
   9 // Licence:     wxWindows licence
  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 (this file is usually all you
  28 // need because it includes almost all "standard" wxWindows headers
  29 #ifndef WX_PRECOMP
  30 #   include "wx/wx.h"
  31 #endif
  32
  33 #   include "wx/image.h"
  34 #   include "wx/help.h"
  35 #   include "wx/cshelp.h"
  36
  37 #if wxUSE_TOOLTIPS
  38 #   include "wx/tooltip.h"
  39 #endif
  40
  41 // define this to 1 to use HTML help even under Windows (by default, Windows
  42 // version will use WinHelp).
  43 // Please also see samples/html/helpview.
  44
  45 #define USE_HTML_HELP 1
  46
  47 // Define this to 0 to use the help controller as the help
  48 // provider, or to 1 to use the 'simple help provider'
  49 // (the one implemented with wxTipWindow).
  50 #define USE_SIMPLE_HELP_PROVIDER 0
  51
  52 #if !wxUSE_HTML
  53 #undef USE_HTML_HELP
  54 #define USE_HTML_HELP 0
  55 #endif
  56
  57 #if USE_HTML_HELP
  58 #include "wx/filesys.h"
  59 #include "wx/fs_zip.h"
  60
  61 #include "wx/html/helpctrl.h"
  62 #endif
  63
  64 #if wxUSE_MS_HTML_HELP
  65 #include "wx/msw/helpchm.h"
  66 #endif
  67
  68 #if wxUSE_MS_HTML_HELP && wxUSE_WXHTML_HELP
  69 #include "wx/msw/helpbest.h"
  70 #endif
  71
  72 // ----------------------------------------------------------------------------
  73 // ressources
  74 // ----------------------------------------------------------------------------
  75 // the application icon
  76 #if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__)
  77     #include "mondrian.xpm"
  78 #endif
  79
  80 // ----------------------------------------------------------------------------
  81 // private classes
  82 // ----------------------------------------------------------------------------
  83
  84 // Define a new application type, each program should derive a class from wxApp
  85 class MyApp : public wxApp
  86 {
  87 public:
  88     // override base class virtuals
  89     // ----------------------------
  90
  91     // this one is called on application startup and is a good place for the app
  92     // initialization (doing it here and not in the ctor allows to have an error
  93     // return: if OnInit() returns false, the application terminates)
  94     virtual bool OnInit();
  95
  96     // do some clean up here
  97     virtual int OnExit();
  98 };
  99
 100 // Define a new frame type: this is going to be our main frame
 101 class MyFrame : public wxFrame
 102 {
 103 public:
 104     // ctor(s)
 105     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
 106
 107     wxHelpController& GetHelpController() { return m_help; }
 108
 109 #if USE_HTML_HELP
 110     wxHtmlHelpController& GetAdvancedHtmlHelpController() { return m_advancedHtmlHelp; }
 111 #endif
 112 #if wxUSE_MS_HTML_HELP
 113     wxCHMHelpController& GetMSHtmlHelpController() { return m_msHtmlHelp; }
 114 #endif
 115 #if wxUSE_MS_HTML_HELP && wxUSE_WXHTML_HELP
 116     wxBestHelpController& GetBestHelpController() { return m_bestHelp; }
 117 #endif
 118
 119     // event handlers (these functions should _not_ be virtual)
 120     void OnQuit(wxCommandEvent& event);
 121     void OnHelp(wxCommandEvent& event);
 122     void OnAdvancedHtmlHelp(wxCommandEvent& event);
 123     void OnMSHtmlHelp(wxCommandEvent& event);
 124     void OnBestHelp(wxCommandEvent& event);
 125
 126     void OnShowContextHelp(wxCommandEvent& event);
 127     void OnShowDialogContextHelp(wxCommandEvent& event);
 128
 129     void ShowHelp(int commandId, wxHelpControllerBase& helpController);
 130
 131 private:
 132    wxHelpController         m_help;
 133
 134 #if USE_HTML_HELP
 135    wxHtmlHelpController     m_advancedHtmlHelp;
 136 #endif
 137
 138 #if wxUSE_MS_HTML_HELP
 139     wxCHMHelpController     m_msHtmlHelp;
 140 #endif
 141
 142 #if wxUSE_MS_HTML_HELP && wxUSE_WXHTML_HELP
 143     wxBestHelpController    m_bestHelp;
 144 #endif
 145
 146     // any class wishing to process wxWindows events must use this macro
 147    DECLARE_EVENT_TABLE()
 148 };
 149
 150 // A custom modal dialog
 151 class MyModalDialog : public wxDialog
 152 {
 153 public:
 154     MyModalDialog(wxWindow *parent);
 155
 156 private:
 157
 158     DECLARE_EVENT_TABLE()
 159 };
 160
 161 // ----------------------------------------------------------------------------
 162 // constants
 163 // ----------------------------------------------------------------------------
 164
 165 // IDs for the controls and the menu commands
 166 enum
 167 {
 168     // menu items
 169     HelpDemo_Quit = 100,
 170     HelpDemo_Help_Index,
 171     HelpDemo_Help_Classes,
 172     HelpDemo_Help_Functions,
 173     HelpDemo_Help_Help,
 174     HelpDemo_Help_Search,
 175     HelpDemo_Help_ContextHelp,
 176     HelpDemo_Help_DialogContextHelp,
 177
 178     HelpDemo_Html_Help_Index,
 179     HelpDemo_Html_Help_Classes,
 180     HelpDemo_Html_Help_Functions,
 181     HelpDemo_Html_Help_Help,
 182     HelpDemo_Html_Help_Search,
 183
 184     HelpDemo_Advanced_Html_Help_Index,
 185     HelpDemo_Advanced_Html_Help_Classes,
 186     HelpDemo_Advanced_Html_Help_Functions,
 187     HelpDemo_Advanced_Html_Help_Help,
 188     HelpDemo_Advanced_Html_Help_Search,
 189
 190     HelpDemo_MS_Html_Help_Index,
 191     HelpDemo_MS_Html_Help_Classes,
 192     HelpDemo_MS_Html_Help_Functions,
 193     HelpDemo_MS_Html_Help_Help,
 194     HelpDemo_MS_Html_Help_Search,
 195
 196     HelpDemo_Best_Help_Index,
 197     HelpDemo_Best_Help_Classes,
 198     HelpDemo_Best_Help_Functions,
 199     HelpDemo_Best_Help_Help,
 200     HelpDemo_Best_Help_Search,
 201
 202     HelpDemo_Help_KDE,
 203     HelpDemo_Help_GNOME,
 204     HelpDemo_Help_Netscape,
 205     // controls start here (the numbers are, of course, arbitrary)
 206     HelpDemo_Text = 1000,
 207 };
 208
 209 // ----------------------------------------------------------------------------
 210 // event tables and other macros for wxWindows
 211 // ----------------------------------------------------------------------------
 212
 213 // the event tables connect the wxWindows events with the functions (event
 214 // handlers) which process them. It can be also done at run-time, but for the
 215 // simple menu events like this the static method is much simpler.
 216 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 217     EVT_MENU(HelpDemo_Quit,  MyFrame::OnQuit)
 218     EVT_MENU(HelpDemo_Help_Index, MyFrame::OnHelp)
 219     EVT_MENU(HelpDemo_Help_Classes, MyFrame::OnHelp)
 220     EVT_MENU(HelpDemo_Help_Functions, MyFrame::OnHelp)
 221     EVT_MENU(HelpDemo_Help_Help, MyFrame::OnHelp)
 222     EVT_MENU(HelpDemo_Help_Search, MyFrame::OnHelp)
 223     EVT_MENU(HelpDemo_Help_ContextHelp, MyFrame::OnShowContextHelp)
 224     EVT_MENU(HelpDemo_Help_DialogContextHelp, MyFrame::OnShowDialogContextHelp)
 225
 226     EVT_MENU(HelpDemo_Advanced_Html_Help_Index, MyFrame::OnAdvancedHtmlHelp)
 227     EVT_MENU(HelpDemo_Advanced_Html_Help_Classes, MyFrame::OnAdvancedHtmlHelp)
 228     EVT_MENU(HelpDemo_Advanced_Html_Help_Functions, MyFrame::OnAdvancedHtmlHelp)
 229     EVT_MENU(HelpDemo_Advanced_Html_Help_Help, MyFrame::OnAdvancedHtmlHelp)
 230     EVT_MENU(HelpDemo_Advanced_Html_Help_Search, MyFrame::OnAdvancedHtmlHelp)
 231
 232     EVT_MENU(HelpDemo_MS_Html_Help_Index, MyFrame::OnMSHtmlHelp)
 233     EVT_MENU(HelpDemo_MS_Html_Help_Classes, MyFrame::OnMSHtmlHelp)
 234     EVT_MENU(HelpDemo_MS_Html_Help_Functions, MyFrame::OnMSHtmlHelp)
 235     EVT_MENU(HelpDemo_MS_Html_Help_Help, MyFrame::OnMSHtmlHelp)
 236     EVT_MENU(HelpDemo_MS_Html_Help_Search, MyFrame::OnMSHtmlHelp)
 237
 238     EVT_MENU(HelpDemo_Best_Help_Index, MyFrame::OnBestHelp)
 239
 240     EVT_MENU(HelpDemo_Help_KDE, MyFrame::OnHelp)
 241     EVT_MENU(HelpDemo_Help_GNOME, MyFrame::OnHelp)
 242     EVT_MENU(HelpDemo_Help_Netscape, MyFrame::OnHelp)
 243 END_EVENT_TABLE()
 244
 245 // Create a new application object: this macro will allow wxWindows to create
 246 // the application object during program execution (it's better than using a
 247 // static object for many reasons) and also declares the accessor function
 248 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 249 // not wxApp)
 250 IMPLEMENT_APP(MyApp)
 251
 252 // ============================================================================
 253 // implementation
 254 // ============================================================================
 255
 256 // ----------------------------------------------------------------------------
 257 // the application class
 258 // ----------------------------------------------------------------------------
 259
 260 // `Main program' equivalent: the program execution "starts" here
 261 bool MyApp::OnInit()
 262 {
 263     // Create a simple help provider to make SetHelpText() do something.
 264     // Note that this must be set before any SetHelpText() calls are made.
 265 #if USE_SIMPLE_HELP_PROVIDER
 266     wxSimpleHelpProvider* provider = new wxSimpleHelpProvider;
 267 #else
 268     wxHelpControllerHelpProvider* provider = new wxHelpControllerHelpProvider;
 269 #endif
 270     wxHelpProvider::Set(provider);
 271
 272 #if wxUSE_HTML
 273 #if wxUSE_GIF
 274     // Required for images in the online documentation
 275     wxImage::AddHandler(new wxGIFHandler);
 276
 277     // Required for advanced HTML help
 278 #if wxUSE_STREAMS && wxUSE_ZIPSTREAM && wxUSE_ZLIB
 279       wxFileSystem::AddHandler(new wxZipFSHandler);
 280 #endif
 281
 282 #endif
 283 #endif
 284
 285     // Create the main application window
 286     MyFrame *frame = new MyFrame("HelpDemo wxWindows App",
 287                                  wxPoint(50, 50), wxSize(450, 340));
 288
 289 #if !USE_SIMPLE_HELP_PROVIDER
 290 #if wxUSE_MS_HTML_HELP
 291     provider->SetHelpController(& frame->GetMSHtmlHelpController());
 292 #else
 293     provider->SetHelpController(& frame->GetHelpController());
 294 #endif
 295 #endif
 296
 297     frame->Show(TRUE);
 298     SetTopWindow(frame);
 299
 300     // initialise the help system: this means that we'll use doc.hlp file under
 301     // Windows and that the HTML docs are in the subdirectory doc for platforms
 302     // using HTML help
 303     if ( !frame->GetHelpController().Initialize("doc") )
 304     {
 305         wxLogError(wxT("Cannot initialize the help system, aborting."));
 306
 307         return FALSE;
 308     }
 309
 310 #if wxUSE_MS_HTML_HELP
 311     if( !frame->GetMSHtmlHelpController().Initialize("doc") )
 312     {
 313         wxLogError(wxT("Cannot initialize the MS HTML Help system."));
 314     }
 315 #endif
 316
 317 #if wxUSE_MS_HTML_HELP && wxUSE_WXHTML_HELP
 318     // you need to call Initialize in order to use wxBestHelpController
 319     if( !frame->GetBestHelpController().Initialize("doc") )
 320     {
 321         wxLogError(wxT("Cannot initialize the best help system, aborting."));
 322     }
 323 #endif
 324
 325 #if USE_HTML_HELP
 326     // initialise the advanced HTML help system: this means that the HTML docs are in .htb
 327     // (zipped) form
 328     if ( !frame->GetAdvancedHtmlHelpController().Initialize("doc") )
 329     {
 330         wxLogError(wxT("Cannot initialize the advanced HTML help system, aborting."));
 331
 332         return FALSE;
 333     }
 334 #endif
 335
 336 #if 0
 337     // defined(__WXMSW__) && wxUSE_MS_HTML_HELP
 338     wxString path(wxGetCwd());
 339     if ( !frame->GetMSHtmlHelpController().Initialize(path + "\\doc.chm") )
 340     {
 341         wxLogError("Cannot initialize the MS HTML help system, aborting.");
 342
 343         return FALSE;
 344     }
 345 #endif
 346
 347     return TRUE;
 348 }
 349
 350 int MyApp::OnExit()
 351 {
 352     // clean up
 353     delete wxHelpProvider::Set(NULL);
 354
 355     return 0;
 356 }
 357
 358 // ----------------------------------------------------------------------------
 359 // main frame
 360 // ----------------------------------------------------------------------------
 361
 362 // frame constructor
 363 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 364        : wxFrame((wxFrame *)NULL, 300, title, pos, size)
 365 {
 366     // set the frame icon
 367     SetIcon(wxICON(mondrian));
 368
 369     // create a menu bar
 370     wxMenu *menuFile = new wxMenu;
 371
 372     menuFile->Append(HelpDemo_Help_Index, "&Help Index...");
 373     menuFile->Append(HelpDemo_Help_Classes, "&Help on Classes...");
 374     menuFile->Append(HelpDemo_Help_Functions, "&Help on Functions...");
 375     menuFile->Append(HelpDemo_Help_ContextHelp, "&Context Help...");
 376     menuFile->Append(HelpDemo_Help_DialogContextHelp, "&Dialog Context Help...\tCtrl-H");
 377     menuFile->Append(HelpDemo_Help_Help, "&About Help Demo...");
 378     menuFile->Append(HelpDemo_Help_Search, "&Search help...");
 379 #if USE_HTML_HELP
 380     menuFile->AppendSeparator();
 381     menuFile->Append(HelpDemo_Advanced_Html_Help_Index, "Advanced HTML &Help Index...");
 382     menuFile->Append(HelpDemo_Advanced_Html_Help_Classes, "Advanced HTML &Help on Classes...");
 383     menuFile->Append(HelpDemo_Advanced_Html_Help_Functions, "Advanced HTML &Help on Functions...");
 384     menuFile->Append(HelpDemo_Advanced_Html_Help_Help, "Advanced HTML &About Help Demo...");
 385     menuFile->Append(HelpDemo_Advanced_Html_Help_Search, "Advanced HTML &Search help...");
 386 #endif
 387
 388 #if wxUSE_MS_HTML_HELP
 389     menuFile->AppendSeparator();
 390     menuFile->Append(HelpDemo_MS_Html_Help_Index, "MS HTML &Help Index...");
 391     menuFile->Append(HelpDemo_MS_Html_Help_Classes, "MS HTML &Help on Classes...");
 392     menuFile->Append(HelpDemo_MS_Html_Help_Functions, "MS HTML &Help on Functions...");
 393     menuFile->Append(HelpDemo_MS_Html_Help_Help, "MS HTML &About Help Demo...");
 394     menuFile->Append(HelpDemo_MS_Html_Help_Search, "MS HTML &Search help...");
 395 #endif
 396
 397 #if wxUSE_MS_HTML_HELP && wxUSE_WXHTML_HELP
 398     menuFile->AppendSeparator();
 399     menuFile->Append(HelpDemo_Best_Help_Index, "Best &Help Index...");
 400 #endif
 401
 402 #ifndef __WXMSW__
 403 #if !wxUSE_HTML
 404     menuFile->AppendSeparator();
 405     menuFile->Append(HelpDemo_Help_KDE, "Use &KDE");
 406     menuFile->Append(HelpDemo_Help_GNOME, "Use &GNOME");
 407     menuFile->Append(HelpDemo_Help_Netscape, "Use &Netscape");
 408 #endif
 409 #endif
 410     menuFile->AppendSeparator();
 411     menuFile->Append(HelpDemo_Quit, "E&xit");
 412
 413     // now append the freshly created menu to the menu bar...
 414     wxMenuBar *menuBar = new wxMenuBar;
 415     menuBar->Append(menuFile, "&File");
 416
 417     // ... and attach this menu bar to the frame
 418     SetMenuBar(menuBar);
 419
 420     // create a status bar just for fun (by default with 1 pane only)
 421     CreateStatusBar();
 422     SetStatusText("Welcome to wxWindows!");
 423
 424     // now create some controls
 425
 426     // a panel first - if there were several controls, it would allow us to
 427     // navigate between them from the keyboard
 428     wxPanel *panel = new wxPanel(this, 301, wxPoint(0, 0), wxSize(400, 200));
 429     panel->SetHelpText(_("This panel just holds a static text control."));
 430     //panel->SetHelpText(wxContextId(300));
 431
 432     // and a static control whose parent is the panel
 433     wxStaticText* staticText = new wxStaticText(panel, 302, "Hello, world!", wxPoint(10, 10));
 434     staticText->SetHelpText(_("This static text control isn't doing a lot right now."));
 435 }
 436
 437
 438 // event handlers
 439
 440 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 441 {
 442     // TRUE is to force the frame to close
 443     Close(TRUE);
 444 }
 445
 446 void MyFrame::OnHelp(wxCommandEvent& event)
 447 {
 448     ShowHelp(event.GetId(), m_help);
 449 }
 450
 451 void MyFrame::OnShowContextHelp(wxCommandEvent& event)
 452 {
 453     // This starts context help mode, then the user
 454     // clicks on a window to send a help message
 455     wxContextHelp contextHelp(this);
 456 }
 457
 458 void MyFrame::OnShowDialogContextHelp(wxCommandEvent& event)
 459 {
 460     MyModalDialog dialog(this);
 461     dialog.ShowModal();
 462 }
 463
 464 void MyFrame::OnAdvancedHtmlHelp(wxCommandEvent& event)
 465 {
 466 #if USE_HTML_HELP
 467     ShowHelp(event.GetId(), m_advancedHtmlHelp);
 468 #endif
 469 }
 470
 471 void MyFrame::OnMSHtmlHelp(wxCommandEvent& event)
 472 {
 473 #if wxUSE_MS_HTML_HELP
 474     ShowHelp(event.GetId(), m_msHtmlHelp);
 475 #endif
 476 }
 477
 478 void MyFrame::OnBestHelp(wxCommandEvent& event)
 479 {
 480 #if wxUSE_MS_HTML_HELP && wxUSE_WXHTML_HELP
 481     ShowHelp(event.GetId(), m_bestHelp);
 482 #endif
 483 }
 484
 485 /*
 486  Notes: ShowHelp uses section ids for displaying particular topics,
 487  but you might want to use a unique keyword to display a topic, instead.
 488
 489  Section ids are specified as follows for the different formats.
 490
 491  WinHelp
 492
 493    The [MAP] section specifies the topic to integer id mapping, e.g.
 494
 495    [MAP]
 496    #define intro       100
 497    #define functions   1
 498    #define classes     2
 499    #define about       3
 500
 501    The identifier name corresponds to the label used for that topic.
 502    You could also put these in a .h file and #include it in both the MAP
 503    section and your C++ source.
 504
 505    Note that Tex2RTF doesn't currently generate the MAP section automatically.
 506
 507  MS HTML Help
 508
 509    The [MAP] section specifies the HTML filename root to integer id mapping, e.g.
 510
 511    [MAP]
 512    #define doc1       100
 513    #define doc3       1
 514    #define doc2       2
 515    #define doc4       3
 516
 517    The identifier name corresponds to the HTML filename used for that topic.
 518    You could also put these in a .h file and #include it in both the MAP
 519    section and your C++ source.
 520
 521    Note that Tex2RTF doesn't currently generate the MAP section automatically.
 522
 523  Simple wxHTML Help and External HTML Help
 524
 525    A wxhelp.map file is used, for example:
 526
 527    0 wx.htm             ; wxWindows: Help index; additional keywords like overview
 528    1 wx204.htm          ; wxWindows Function Reference
 529    2 wx34.htm           ; wxWindows Class Reference
 530
 531    Note that Tex2RTF doesn't currently generate the MAP section automatically.
 532
 533  Advanced HTML Help
 534
 535    An extension to the .hhc file format is used, specifying a new parameter
 536    with name="ID":
 537
 538    <OBJECT type="text/sitemap">
 539    <param name="Local" value="doc2.htm#classes">
 540    <param name="Name" value="Classes">
 541    <param name="ID" value=2>
 542    </OBJECT>
 543
 544    Again, this is not generated automatically by Tex2RTF, though it could
 545    be added quite easily.
 546
 547    Unfortunately adding the ID parameters appears to interfere with MS HTML Help,
 548    so you should not try to compile a .chm file from a .hhc file with
 549    this extension, or the contents will be messed up.
 550  */
 551
 552 void MyFrame::ShowHelp(int commandId, wxHelpControllerBase& helpController)
 553 {
 554    switch(commandId)
 555    {
 556        case HelpDemo_Help_Classes:
 557        case HelpDemo_Html_Help_Classes:
 558        case HelpDemo_Advanced_Html_Help_Classes:
 559        case HelpDemo_MS_Html_Help_Classes:
 560        case HelpDemo_Best_Help_Classes:
 561           helpController.DisplaySection(2);
 562           //helpController.DisplaySection("Classes"); // An alternative form for most controllers
 563           break;
 564
 565        case HelpDemo_Help_Functions:
 566        case HelpDemo_Html_Help_Functions:
 567        case HelpDemo_Advanced_Html_Help_Functions:
 568        case HelpDemo_MS_Html_Help_Functions:
 569           helpController.DisplaySection(1);
 570           //helpController.DisplaySection("Functions"); // An alternative form for most controllers
 571           break;
 572
 573        case HelpDemo_Help_Help:
 574        case HelpDemo_Html_Help_Help:
 575        case HelpDemo_Advanced_Html_Help_Help:
 576        case HelpDemo_MS_Html_Help_Help:
 577        case HelpDemo_Best_Help_Help:
 578           helpController.DisplaySection(3);
 579           //helpController.DisplaySection("About"); // An alternative form for most controllers
 580           break;
 581
 582        case HelpDemo_Help_Search:
 583        case HelpDemo_Html_Help_Search:
 584        case HelpDemo_Advanced_Html_Help_Search:
 585        case HelpDemo_MS_Html_Help_Search:
 586        case HelpDemo_Best_Help_Search:
 587        {
 588           wxString key = wxGetTextFromUser("Search for?",
 589                                            "Search help for keyword",
 590                                            "",
 591                                            this);
 592           if(! key.IsEmpty())
 593              helpController.KeywordSearch(key);
 594        }
 595        break;
 596
 597        case HelpDemo_Help_Index:
 598        case HelpDemo_Html_Help_Index:
 599        case HelpDemo_Advanced_Html_Help_Index:
 600        case HelpDemo_MS_Html_Help_Index:
 601        case HelpDemo_Best_Help_Index:
 602           helpController.DisplayContents();
 603           break;
 604
 605        // These three calls are only used by wxExtHelpController
 606
 607        case HelpDemo_Help_KDE:
 608           helpController.SetViewer("kdehelp");
 609           break;
 610        case HelpDemo_Help_GNOME:
 611           helpController.SetViewer("gnome-help-browser");
 612           break;
 613        case HelpDemo_Help_Netscape:
 614           helpController.SetViewer("netscape", wxHELP_NETSCAPE);
 615           break;
 616    }
 617 }
 618
 619 // ----------------------------------------------------------------------------
 620 // MyModalDialog
 621 // Demonstrates context-sensitive help
 622 // ----------------------------------------------------------------------------
 623
 624 BEGIN_EVENT_TABLE(MyModalDialog, wxDialog)
 625 END_EVENT_TABLE()
 626
 627 MyModalDialog::MyModalDialog(wxWindow *parent)
 628              : wxDialog()
 629 {
 630     // Add the context-sensitive help button on the caption for MSW
 631 #ifdef __WXMSW__
 632     SetExtraStyle(wxDIALOG_EX_CONTEXTHELP);
 633 #endif
 634
 635     wxDialog::Create(parent, -1, wxString("Modal dialog"));
 636
 637     wxBoxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
 638     wxBoxSizer *sizerRow = new wxBoxSizer(wxHORIZONTAL);
 639
 640     wxButton* btnOK = new wxButton(this, wxID_OK, "&OK");
 641     btnOK->SetHelpText(_("The OK button confirms the dialog choices."));
 642
 643     wxButton* btnCancel = new wxButton(this, wxID_CANCEL, "&Cancel");
 644     btnCancel->SetHelpText(_("The Cancel button cancels the dialog."));
 645
 646     sizerRow->Add(btnOK, 0, wxALIGN_CENTER | wxALL, 5);
 647     sizerRow->Add(btnCancel, 0, wxALIGN_CENTER | wxALL, 5);
 648
 649     // Add explicit context-sensitive help button for non-MSW
 650 #ifndef __WXMSW__
 651     sizerRow->Add(new wxContextHelpButton(this), 0, wxALIGN_CENTER | wxALL, 5);
 652 #endif
 653
 654     wxTextCtrl *text = new wxTextCtrl(this, -1, wxT("A demo text control"),
 655                                       wxDefaultPosition, wxSize(300, 100),
 656                                       wxTE_MULTILINE);
 657     text->SetHelpText(_("Type text here if you have got nothing more interesting to do"));
 658     sizerTop->Add(text, 0, wxEXPAND|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
 659     sizerTop->Add(sizerRow, 0, wxALIGN_RIGHT|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
 660
 661     SetAutoLayout(TRUE);
 662     SetSizer(sizerTop);
 663
 664     sizerTop->SetSizeHints(this);
 665     sizerTop->Fit(this);
 666
 667     btnOK->SetFocus();
 668     btnOK->SetDefault();
 669 }
 670