samples/help/demo.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        minimal.cpp
   3 // Purpose:     Minimal wxWindows sample
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20     #pragma implementation "minimal.cpp"
  21     #pragma interface "minimal.cpp"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx/wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 // for all others, include the necessary headers (this file is usually all you
  32 // need because it includes almost all "standard" wxWindows headers
  33 #ifndef WX_PRECOMP
  34     #include "wx/wx.h"
  35 #endif
  36
  37 #include   "wx/helpbase.h"
  38 #include   "wx/help.h"
  39
  40 // ----------------------------------------------------------------------------
  41 // ressources
  42 // ----------------------------------------------------------------------------
  43 // the application icon
  44 #if defined(__WXGTK__) || defined(__WXMOTIF__)
  45     #include "mondrian.xpm"
  46 #endif
  47
  48 // ----------------------------------------------------------------------------
  49 // private classes
  50 // ----------------------------------------------------------------------------
  51
  52 // Define a new application type, each program should derive a class from wxApp
  53 class MyApp : public wxApp
  54 {
  55 public:
  56     // override base class virtuals
  57     // ----------------------------
  58
  59     // this one is called on application startup and is a good place for the app
  60     // initialization (doing it here and not in the ctor allows to have an error
  61     // return: if OnInit() returns false, the application terminates)
  62     virtual bool OnInit();
  63 };
  64
  65 // Define a new frame type: this is going to be our main frame
  66 class MyFrame : public wxFrame
  67 {
  68 public:
  69     // ctor(s)
  70     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  71
  72     // event handlers (these functions should _not_ be virtual)
  73     void OnQuit(wxCommandEvent& event);
  74     void OnHelp(wxCommandEvent& event);
  75
  76 private:
  77    wxHelpController  help;
  78     // any class wishing to process wxWindows events must use this macro
  79    DECLARE_EVENT_TABLE()
  80 };
  81
  82 // ----------------------------------------------------------------------------
  83 // constants
  84 // ----------------------------------------------------------------------------
  85
  86 // IDs for the controls and the menu commands
  87 enum
  88 {
  89     // menu items
  90     Minimal_Quit = 1,
  91     Minimal_Help_Index,
  92     Minimal_Help_Classes,
  93     Minimal_Help_Functions,
  94     Minimal_Help_Help,
  95     Minimal_Help_KDE,
  96     Minimal_Help_GNOME,
  97     Minimal_Help_Netscape,
  98     Minimal_Help_Search,
  99     // controls start here (the numbers are, of course, arbitrary)
 100     Minimal_Text = 1000,
 101 };
 102
 103 // ----------------------------------------------------------------------------
 104 // event tables and other macros for wxWindows
 105 // ----------------------------------------------------------------------------
 106
 107 // the event tables connect the wxWindows events with the functions (event
 108 // handlers) which process them. It can be also done at run-time, but for the
 109 // simple menu events like this the static method is much simpler.
 110 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 111     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
 112     EVT_MENU(Minimal_Help_Index, MyFrame::OnHelp)
 113     EVT_MENU(Minimal_Help_Classes, MyFrame::OnHelp)
 114     EVT_MENU(Minimal_Help_Functions, MyFrame::OnHelp)
 115     EVT_MENU(Minimal_Help_Help, MyFrame::OnHelp)
 116     EVT_MENU(Minimal_Help_KDE, MyFrame::OnHelp)
 117     EVT_MENU(Minimal_Help_GNOME, MyFrame::OnHelp)
 118     EVT_MENU(Minimal_Help_Netscape, MyFrame::OnHelp)
 119     EVT_MENU(Minimal_Help_Search, MyFrame::OnHelp)
 120 END_EVENT_TABLE()
 121
 122 // Create a new application object: this macro will allow wxWindows to create
 123 // the application object during program execution (it's better than using a
 124 // static object for many reasons) and also declares the accessor function
 125 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 126 // not wxApp)
 127 IMPLEMENT_APP(MyApp)
 128
 129 // ============================================================================
 130 // implementation
 131 // ============================================================================
 132
 133 // ----------------------------------------------------------------------------
 134 // the application class
 135 // ----------------------------------------------------------------------------
 136
 137 // `Main program' equivalent: the program execution "starts" here
 138 bool MyApp::OnInit()
 139 {
 140     // Create the main application window
 141     MyFrame *frame = new MyFrame("Minimal wxWindows App",
 142                                  wxPoint(50, 50), wxSize(450, 340));
 143
 144     // Show it and tell the application that it's our main window
 145     // @@@ what does it do exactly, in fact? is it necessary here?
 146     frame->Show(TRUE);
 147     SetTopWindow(frame);
 148
 149     // success: wxApp::OnRun() will be called which will enter the main message
 150     // loop and the application will run. If we returned FALSE here, the
 151     // application would exit immediately.
 152     return TRUE;
 153 }
 154
 155 // ----------------------------------------------------------------------------
 156 // main frame
 157 // ----------------------------------------------------------------------------
 158
 159 // frame constructor
 160 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 161        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 162 {
 163     // set the frame icon
 164     SetIcon(wxICON(mondrian));
 165
 166     // create a menu bar
 167     wxMenu *menuFile = new wxMenu;
 168
 169     menuFile->Append(Minimal_Help_Index, "&Help Index...");
 170     menuFile->Append(Minimal_Help_Classes, "&Help on Classes...");
 171     menuFile->Append(Minimal_Help_Functions, "&Help on Functions...");
 172     menuFile->Append(Minimal_Help_Help, "&About wxExtHelpController...");
 173     menuFile->AppendSeparator();
 174     menuFile->Append(Minimal_Help_Search, "&Search help...");
 175     if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
 176        {
 177           menuFile->AppendSeparator();
 178           menuFile->Append(Minimal_Help_KDE, "Use &KDE");
 179           menuFile->Append(Minimal_Help_GNOME, "Use &GNOME");
 180           menuFile->Append(Minimal_Help_Netscape, "Use &Netscape");
 181        }
 182     menuFile->AppendSeparator();
 183     menuFile->Append(Minimal_Quit, "E&xit");
 184
 185     // now append the freshly created menu to the menu bar...
 186     wxMenuBar *menuBar = new wxMenuBar;
 187     menuBar->Append(menuFile, "&File");
 188
 189     // ... and attach this menu bar to the frame
 190     SetMenuBar(menuBar);
 191
 192     // create a status bar just for fun (by default with 1 pane only)
 193     CreateStatusBar();
 194     SetStatusText("Welcome to wxWindows!");
 195
 196     // now create some controls
 197
 198     // a panel first - if there were several controls, it would allow us to
 199     // navigate between them from the keyboard
 200     wxPanel *panel = new wxPanel(this, -1, wxPoint(0, 0), wxSize(400, 200));
 201
 202     // and a static control whose parent is the panel
 203     (void)new wxStaticText(panel, -1, "Hello, world!", wxPoint(10, 10));
 204
 205     // initialise the help system
 206     help.Initialize("doc");
 207
 208 }
 209
 210
 211 // event handlers
 212
 213 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 214 {
 215     // TRUE is to force the frame to close
 216     Close(TRUE);
 217 }
 218
 219 void MyFrame::OnHelp(wxCommandEvent& event)
 220 {
 221    switch(event.GetId())
 222    {
 223    case Minimal_Help_Classes:
 224       help.DisplaySection(1);
 225       break;
 226    case Minimal_Help_Functions:
 227       help.DisplaySection(2);
 228       break;
 229    case Minimal_Help_Help:
 230       help.DisplaySection(5);
 231       break;
 232    case Minimal_Help_KDE:
 233       if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
 234          ((wxExtHelpController *)&help)->SetBrowser("kdehelp");
 235       break;
 236    case Minimal_Help_GNOME:
 237       if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
 238          ((wxExtHelpController *)&help)->SetBrowser("gnome-help-browser");
 239       break;
 240    case Minimal_Help_Netscape:
 241       if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
 242          ((wxExtHelpController *)&help)->SetBrowser("netscape",TRUE);
 243       break;
 244    case Minimal_Help_Search:
 245    {
 246       wxString key = wxGetTextFromUser("Search for?",
 247                                        "Search help for keyword",
 248                                        "",
 249                                        this);
 250       if(! key.IsEmpty())
 251          help.KeywordSearch(key);
 252    }
 253    break;
 254    case Minimal_Help_Index:
 255    default:
 256       help.DisplayContents();
 257       break;
 258    }
 259 }