samples/html/about/about.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        about.cpp
   3 // Purpose:     wxHtml sample: about dialog test
   4 // Author:      ?
   5 // Modified by:
   6 // Created:     ?
   7 // Copyright:   (c) wxWidgets team
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx/wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 // for all others, include the necessary headers (this file is usually all you
  19 // need because it includes almost all "standard" wxWidgets headers
  20 #ifndef WX_PRECOMP
  21     #include "wx/wx.h"
  22 #endif
  23
  24 #include "wx/image.h"
  25 #include "wx/imagpng.h"
  26 #include "wx/wxhtml.h"
  27 #include "wx/statline.h"
  28
  29 #ifndef wxHAS_IMAGES_IN_RESOURCES
  30     #include "../../sample.xpm"
  31 #endif
  32
  33
  34 // ----------------------------------------------------------------------------
  35 // private classes
  36 // ----------------------------------------------------------------------------
  37
  38
  39 // Define a new application type, each program should derive a class from wxApp
  40 class MyApp : public wxApp
  41 {
  42 public:
  43     // override base class virtuals
  44     // ----------------------------
  45
  46     // this one is called on application startup and is a good place for the app
  47     // initialization (doing it here and not in the ctor allows to have an error
  48     // return: if OnInit() returns false, the application terminates)
  49     virtual bool OnInit();
  50 };
  51
  52 // Define a new frame type: this is going to be our main frame
  53 class MyFrame : public wxFrame
  54 {
  55 public:
  56     // ctor(s)
  57     MyFrame(const wxString& title);
  58
  59     // event handlers (these functions should _not_ be virtual)
  60     void OnQuit(wxCommandEvent& event);
  61     void OnAbout(wxCommandEvent& event);
  62
  63 private:
  64     // any class wishing to process wxWidgets events must use this macro
  65     DECLARE_EVENT_TABLE()
  66 };
  67
  68 // ----------------------------------------------------------------------------
  69 // event tables and other macros for wxWidgets
  70 // ----------------------------------------------------------------------------
  71
  72 // the event tables connect the wxWidgets events with the functions (event
  73 // handlers) which process them. It can be also done at run-time, but for the
  74 // simple menu events like this the static method is much simpler.
  75 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  76    EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
  77    EVT_MENU(wxID_EXIT,  MyFrame::OnQuit)
  78 END_EVENT_TABLE()
  79
  80 // Create a new application object: this macro will allow wxWidgets to create
  81 // the application object during program execution (it's better than using a
  82 // static object for many reasons) and also declares the accessor function
  83 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
  84 // not wxApp)
  85 IMPLEMENT_APP(MyApp)
  86
  87 // ============================================================================
  88 // implementation
  89 // ============================================================================
  90
  91 // ----------------------------------------------------------------------------
  92 // the application class
  93 // ----------------------------------------------------------------------------
  94
  95 // `Main program' equivalent: the program execution "starts" here
  96 bool MyApp::OnInit()
  97 {
  98     if ( !wxApp::OnInit() )
  99         return false;
 100
 101     // we use a PNG image in our HTML page
 102     wxImage::AddHandler(new wxPNGHandler);
 103
 104     // create and show the main application window
 105     MyFrame *frame = new MyFrame(_("wxHtmlWindow testing application"));
 106     frame->Show();
 107
 108     // success: wxApp::OnRun() will be called which will enter the main message
 109     // loop and the application will run. If we returned false here, the
 110     // application would exit immediately.
 111     return true;
 112 }
 113
 114 // ----------------------------------------------------------------------------
 115 // main frame
 116 // ----------------------------------------------------------------------------
 117
 118 // frame constructor
 119 MyFrame::MyFrame(const wxString& title)
 120        : wxFrame((wxFrame *)NULL, wxID_ANY, title)
 121 {
 122     SetIcon(wxICON(sample));
 123
 124     // create a menu bar
 125     wxMenu *menuFile = new wxMenu;
 126
 127     menuFile->Append(wxID_ABOUT);
 128     menuFile->Append(wxID_EXIT);
 129
 130     // now append the freshly created menu to the menu bar...
 131     wxMenuBar *menuBar = new wxMenuBar;
 132     menuBar->Append(menuFile, _("&File"));
 133
 134     // ... and attach this menu bar to the frame
 135     SetMenuBar(menuBar);
 136 }
 137
 138
 139 // event handlers
 140
 141 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 142 {
 143     // true is to force the frame to close
 144     Close(true);
 145 }
 146
 147 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 148 {
 149     wxBoxSizer *topsizer;
 150     wxHtmlWindow *html;
 151     wxDialog dlg(this, wxID_ANY, wxString(_("About")));
 152
 153     topsizer = new wxBoxSizer(wxVERTICAL);
 154
 155     html = new wxHtmlWindow(&dlg, wxID_ANY, wxDefaultPosition, wxSize(380, 160), wxHW_SCROLLBAR_NEVER);
 156     html -> SetBorders(0);
 157     html -> LoadPage(wxT("data/about.htm"));
 158     html -> SetSize(html -> GetInternalRepresentation() -> GetWidth(),
 159                     html -> GetInternalRepresentation() -> GetHeight());
 160
 161     topsizer -> Add(html, 1, wxALL, 10);
 162
 163 #if wxUSE_STATLINE
 164     topsizer -> Add(new wxStaticLine(&dlg, wxID_ANY), 0, wxEXPAND | wxLEFT | wxRIGHT, 10);
 165 #endif // wxUSE_STATLINE
 166
 167     wxButton *bu1 = new wxButton(&dlg, wxID_OK, _("OK"));
 168     bu1 -> SetDefault();
 169
 170     topsizer -> Add(bu1, 0, wxALL | wxALIGN_RIGHT, 15);
 171
 172     dlg.SetSizer(topsizer);
 173     topsizer -> Fit(&dlg);
 174
 175     dlg.ShowModal();
 176 }
 177