samples/html/about/about.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/imagpng.h"
  21 #include "wx/wxhtml.h"
  22 #include "wx/statline.h"
  23
  24 // ----------------------------------------------------------------------------
  25 // private classes
  26 // ----------------------------------------------------------------------------
  27
  28
  29 // Define a new application type, each program should derive a class from wxApp
  30    class MyApp : public wxApp
  31    {
  32    public:
  33     // override base class virtuals
  34     // ----------------------------
  35
  36     // this one is called on application startup and is a good place for the app
  37     // initialization (doing it here and not in the ctor allows to have an error
  38     // return: if OnInit() returns false, the application terminates)
  39       virtual bool OnInit();
  40    };
  41
  42 // Define a new frame type: this is going to be our main frame
  43    class MyFrame : public wxFrame
  44    {
  45    public:
  46     // ctor(s)
  47       MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  48
  49     // event handlers (these functions should _not_ be virtual)
  50       void OnQuit(wxCommandEvent& event);
  51       void OnAbout(wxCommandEvent& event);
  52
  53    private:
  54     // any class wishing to process wxWidgets events must use this macro
  55     DECLARE_EVENT_TABLE()
  56    };
  57
  58 // ----------------------------------------------------------------------------
  59 // constants
  60 // ----------------------------------------------------------------------------
  61
  62 // IDs for the controls and the menu commands
  63    enum
  64    {
  65     // menu items
  66    Minimal_Quit = 1,
  67    Minimal_About,
  68    Minimal_Back,
  69    Minimal_Forward,
  70
  71     // controls start here (the numbers are, of course, arbitrary)
  72    Minimal_Text = 1000
  73    };
  74
  75 // ----------------------------------------------------------------------------
  76 // event tables and other macros for wxWidgets
  77 // ----------------------------------------------------------------------------
  78
  79 // the event tables connect the wxWidgets events with the functions (event
  80 // handlers) which process them. It can be also done at run-time, but for the
  81 // simple menu events like this the static method is much simpler.
  82    BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  83    EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
  84    EVT_MENU(Minimal_About, MyFrame::OnAbout)
  85    END_EVENT_TABLE()
  86
  87    // Create a new application object: this macro will allow wxWidgets to create
  88    // the application object during program execution (it's better than using a
  89    // static object for many reasons) and also declares the accessor function
  90    // wxGetApp() which will return the reference of the right type (i.e. MyApp and
  91    // not wxApp)
  92    IMPLEMENT_APP(MyApp)
  93
  94    // ============================================================================
  95    // implementation
  96    // ============================================================================
  97
  98    // ----------------------------------------------------------------------------
  99    // the application class
 100    // ----------------------------------------------------------------------------
 101    // `Main program' equivalent: the program execution "starts" here
 102    bool MyApp::OnInit()
 103    {
 104     wxImage::AddHandler(new wxPNGHandler);
 105     // Create the main application window
 106       MyFrame *frame = new MyFrame(_("wxHtmlWindow testing application"),
 107          wxDefaultPosition, wxDefaultSize);
 108
 109     // Show it and tell the application that it's our main window
 110     // @@@ what does it do exactly, in fact? is it necessary here?
 111       frame->Show(true);
 112       SetTopWindow(frame);
 113
 114
 115     // success: wxApp::OnRun() will be called which will enter the main message
 116     // loop and the application will run. If we returned false here, the
 117     // application would exit immediately.
 118       return true;
 119    }
 120
 121 // ----------------------------------------------------------------------------
 122 // main frame
 123 // ----------------------------------------------------------------------------
 124
 125
 126 // frame constructor
 127    MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 128    : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size)
 129    {
 130     // create a menu bar
 131       wxMenu *menuFile = new wxMenu;
 132
 133       menuFile->Append(Minimal_About, _("&About"));
 134       menuFile->Append(Minimal_Quit, _("E&xit"));
 135
 136     // now append the freshly created menu to the menu bar...
 137       wxMenuBar *menuBar = new wxMenuBar;
 138       menuBar->Append(menuFile, _("&File"));
 139
 140     // ... and attach this menu bar to the frame
 141       SetMenuBar(menuBar);
 142    }
 143
 144
 145 // event handlers
 146
 147    void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 148    {
 149     // true is to force the frame to close
 150       Close(true);
 151    }
 152
 153    void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 154    {
 155         wxBoxSizer *topsizer;
 156         wxHtmlWindow *html;
 157         wxDialog dlg(this, wxID_ANY, wxString(_("About")));
 158
 159         topsizer = new wxBoxSizer(wxVERTICAL);
 160
 161         html = new wxHtmlWindow(&dlg, wxID_ANY, wxDefaultPosition, wxSize(380, 160), wxHW_SCROLLBAR_NEVER);
 162         html -> SetBorders(0);
 163         html -> LoadPage(wxT("data/about.htm"));
 164         html -> SetSize(html -> GetInternalRepresentation() -> GetWidth(),
 165                         html -> GetInternalRepresentation() -> GetHeight());
 166
 167         topsizer -> Add(html, 1, wxALL, 10);
 168
 169 #if wxUSE_STATLINE
 170         topsizer -> Add(new wxStaticLine(&dlg, wxID_ANY), 0, wxEXPAND | wxLEFT | wxRIGHT, 10);
 171 #endif // wxUSE_STATLINE
 172
 173         wxButton *bu1 = new wxButton(&dlg, wxID_OK, _("OK"));
 174         bu1 -> SetDefault();
 175
 176         topsizer -> Add(bu1, 0, wxALL | wxALIGN_RIGHT, 15);
 177
 178         dlg.SetSizer(topsizer);
 179         topsizer -> Fit(&dlg);
 180
 181         dlg.ShowModal();
 182     }
 183