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);
  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 // event tables and other macros for wxWidgets
  60 // ----------------------------------------------------------------------------
  61
  62 // the event tables connect the wxWidgets events with the functions (event
  63 // handlers) which process them. It can be also done at run-time, but for the
  64 // simple menu events like this the static method is much simpler.
  65 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  66    EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
  67    EVT_MENU(wxID_EXIT,  MyFrame::OnQuit)
  68 END_EVENT_TABLE()
  69
  70 // Create a new application object: this macro will allow wxWidgets to create
  71 // the application object during program execution (it's better than using a
  72 // static object for many reasons) and also declares the accessor function
  73 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
  74 // not wxApp)
  75 IMPLEMENT_APP(MyApp)
  76
  77 // ============================================================================
  78 // implementation
  79 // ============================================================================
  80
  81 // ----------------------------------------------------------------------------
  82 // the application class
  83 // ----------------------------------------------------------------------------
  84
  85 // `Main program' equivalent: the program execution "starts" here
  86 bool MyApp::OnInit()
  87 {
  88     if ( !wxApp::OnInit() )
  89         return false;
  90
  91     // we use a PNG image in our HTML page
  92     wxImage::AddHandler(new wxPNGHandler);
  93
  94     // create and show the main application window
  95     MyFrame *frame = new MyFrame(_("wxHtmlWindow testing application"));
  96     frame->Show();
  97
  98     // success: wxApp::OnRun() will be called which will enter the main message
  99     // loop and the application will run. If we returned false here, the
 100     // application would exit immediately.
 101     return true;
 102 }
 103
 104 // ----------------------------------------------------------------------------
 105 // main frame
 106 // ----------------------------------------------------------------------------
 107
 108 // frame constructor
 109 MyFrame::MyFrame(const wxString& title)
 110        : wxFrame((wxFrame *)NULL, wxID_ANY, title)
 111 {
 112     // create a menu bar
 113     wxMenu *menuFile = new wxMenu;
 114
 115     menuFile->Append(wxID_ABOUT);
 116     menuFile->Append(wxID_EXIT);
 117
 118     // now append the freshly created menu to the menu bar...
 119     wxMenuBar *menuBar = new wxMenuBar;
 120     menuBar->Append(menuFile, _("&File"));
 121
 122     // ... and attach this menu bar to the frame
 123     SetMenuBar(menuBar);
 124 }
 125
 126
 127 // event handlers
 128
 129 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 130 {
 131     // true is to force the frame to close
 132     Close(true);
 133 }
 134
 135 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 136 {
 137     wxBoxSizer *topsizer;
 138     wxHtmlWindow *html;
 139     wxDialog dlg(this, wxID_ANY, wxString(_("About")));
 140
 141     topsizer = new wxBoxSizer(wxVERTICAL);
 142
 143     html = new wxHtmlWindow(&dlg, wxID_ANY, wxDefaultPosition, wxSize(380, 160), wxHW_SCROLLBAR_NEVER);
 144     html -> SetBorders(0);
 145     html -> LoadPage(wxT("data/about.htm"));
 146     html -> SetSize(html -> GetInternalRepresentation() -> GetWidth(),
 147                     html -> GetInternalRepresentation() -> GetHeight());
 148
 149     topsizer -> Add(html, 1, wxALL, 10);
 150
 151 #if wxUSE_STATLINE
 152     topsizer -> Add(new wxStaticLine(&dlg, wxID_ANY), 0, wxEXPAND | wxLEFT | wxRIGHT, 10);
 153 #endif // wxUSE_STATLINE
 154
 155     wxButton *bu1 = new wxButton(&dlg, wxID_OK, _("OK"));
 156     bu1 -> SetDefault();
 157
 158     topsizer -> Add(bu1, 0, wxALL | wxALIGN_RIGHT, 15);
 159
 160     dlg.SetSizer(topsizer);
 161     topsizer -> Fit(&dlg);
 162
 163     dlg.ShowModal();
 164 }
 165