samples/html/zip/zip.cpp

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