samples/html/zip/zip.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        zip.cpp
   3 // Purpose:     wxHtml sample
   4 // Author:      ?
   5 // Modified by:
   6 // Created:     ?
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx/wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 // for all others, include the necessary headers (this file is usually all you
  20 // need because it includes almost all "standard" wxWidgets headers
  21 #ifndef WX_PRECOMP
  22     #include "wx/wx.h"
  23 #endif
  24
  25 #include "wx/image.h"
  26 #include "wx/html/htmlwin.h"
  27 #include "wx/fs_zip.h"
  28
  29 #ifndef __WXMSW__
  30     #include "../../sample.xpm"
  31 #endif
  32
  33 // ----------------------------------------------------------------------------
  34 // private classes
  35 // ----------------------------------------------------------------------------
  36
  37 // Define a new application type, each program should derive a class from wxApp
  38 class MyApp : public wxApp
  39 {
  40 public:
  41     // override base class virtuals
  42     // ----------------------------
  43
  44     // this one is called on application startup and is a good place for the app
  45     // initialization (doing it here and not in the ctor allows to have an error
  46     // return: if OnInit() returns false, the application terminates)
  47     virtual bool OnInit();
  48 };
  49
  50 // Define a new frame type: this is going to be our main frame
  51 class MyFrame : public wxFrame
  52 {
  53 public:
  54     // ctor(s)
  55     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  56
  57     // event handlers (these functions should _not_ be virtual)
  58     void OnQuit(wxCommandEvent& event);
  59     void OnBack(wxCommandEvent& event);
  60     void OnForward(wxCommandEvent& event);
  61
  62 private:
  63     // any class wishing to process wxWidgets events must use this macro
  64     DECLARE_EVENT_TABLE()
  65 };
  66
  67 // ----------------------------------------------------------------------------
  68 // constants
  69 // ----------------------------------------------------------------------------
  70
  71 // IDs for the controls and the menu commands
  72 enum
  73 {
  74     // menu items
  75     Minimal_Quit = 1,
  76     Minimal_Back,
  77     Minimal_Forward
  78 };
  79
  80 // ----------------------------------------------------------------------------
  81 // event tables and other macros for wxWidgets
  82 // ----------------------------------------------------------------------------
  83
  84 // the event tables connect the wxWidgets events with the functions (event
  85 // handlers) which process them. It can be also done at run-time, but for the
  86 // simple menu events like this the static method is much simpler.
  87 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  88     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
  89     EVT_MENU(Minimal_Back, MyFrame::OnBack)
  90     EVT_MENU(Minimal_Forward, MyFrame::OnForward)
  91 END_EVENT_TABLE()
  92
  93 // Create a new application object: this macro will allow wxWidgets to create
  94 // the application object during program execution (it's better than using a
  95 // static object for many reasons) and also declares the accessor function
  96 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
  97 // not wxApp)
  98 IMPLEMENT_APP(MyApp)
  99
 100 // ============================================================================
 101 // implementation
 102 // ============================================================================
 103
 104 // ----------------------------------------------------------------------------
 105 // the application class
 106 // ----------------------------------------------------------------------------
 107 // `Main program' equivalent: the program execution "starts" here
 108 bool MyApp::OnInit()
 109 {
 110     if ( !wxApp::OnInit() )
 111         return false;
 112
 113 #if wxUSE_LIBPNG
 114     wxImage::AddHandler(new wxPNGHandler);
 115 #endif
 116 #if wxUSE_LIBJPEG
 117     wxImage::AddHandler(new wxJPEGHandler);
 118 #endif
 119
 120     wxFileSystem::AddHandler(new wxZipFSHandler);
 121
 122     // Create the main application window
 123     MyFrame *frame = new MyFrame(_("wxHtmlWindow testing application"),
 124         wxDefaultPosition, wxSize(640, 480) );
 125
 126     // Show it and tell the application that it's our main window
 127     // @@@ what does it do exactly, in fact? is it necessary here?
 128     frame->Show(true);
 129     SetTopWindow(frame);
 130
 131     // success: wxApp::OnRun() will be called which will enter the main message
 132     // loop and the application will run. If we returned false here, the
 133     // application would exit immediately.
 134
 135     return true;
 136 }
 137
 138 // ----------------------------------------------------------------------------
 139 // main frame
 140 // ----------------------------------------------------------------------------
 141
 142 wxHtmlWindow *html;
 143
 144 // frame constructor
 145 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 146     : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
 147 {
 148     SetIcon(wxICON(sample));
 149
 150     // create a menu bar
 151     wxMenu *menuFile = new wxMenu;
 152     wxMenu *menuNav = new wxMenu;
 153
 154     menuFile->Append(Minimal_Quit, _("E&xit"));
 155     menuNav->Append(Minimal_Back, _("Go &BACK"));
 156     menuNav->Append(Minimal_Forward, _("Go &FORWARD"));
 157
 158     // now append the freshly created menu to the menu bar...
 159     wxMenuBar *menuBar = new wxMenuBar;
 160     menuBar->Append(menuFile, _("&File"));
 161     menuBar->Append(menuNav, _("&Navigate"));
 162
 163     // ... and attach this menu bar to the frame
 164     SetMenuBar(menuBar);
 165
 166 #if wxUSE_STATUSBAR
 167     CreateStatusBar(1);
 168 #endif // wxUSE_STATUSBAR
 169
 170     html = new wxHtmlWindow(this);
 171     html -> SetRelatedFrame(this, _("HTML : %s"));
 172 #if wxUSE_STATUSBAR
 173     html -> SetRelatedStatusBar(0);
 174 #endif // wxUSE_STATUSBAR
 175     html -> LoadPage(wxT("start.htm"));
 176 }
 177
 178
 179 // event handlers
 180
 181 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 182 {
 183     // true is to force the frame to close
 184     Close(true);
 185 }
 186
 187 void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event))
 188 {
 189     if (!html -> HistoryBack()) wxMessageBox(_("You reached prehistory era!"));
 190 }
 191
 192 void MyFrame::OnForward(wxCommandEvent& WXUNUSED(event))
 193 {
 194     if (!html -> HistoryForward()) wxMessageBox(_("No more items in history!"));
 195 }