wxWidgets/samples/html/test/test.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        test.cpp
// Purpose:     wxHtml testing example
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
    #pragma implementation "test.cpp"
    #pragma interface "test.cpp"
#endif

// For compilers that support precompilation, includes "wx/wx.h".
#include <wx/wxprec.h>

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWindows headers
#ifndef WX_PRECOMP
    #include <wx/wx.h>
#endif

#include "wx/image.h"
#include "wx/html/htmlwin.h"
#include "wx/html/htmlproc.h"
#include "wx/fs_inet.h"
#include "wx/filedlg.h"

// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

// Define a new application type, each program should derive a class from wxApp
class MyApp : public wxApp
{
public:
 // override base class virtuals
 // ----------------------------

 // this one is called on application startup and is a good place for the app
 // initialization (doing it here and not in the ctor allows to have an error
 // return: if OnInit() returns false, the application terminates)
   virtual bool OnInit();
};

// Define a new frame type: this is going to be our main frame
class MyFrame : public wxFrame
{
public:
 // ctor(s)
    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);

  // event handlers (these functions should _not_ be virtual)
    void OnQuit(wxCommandEvent& event);
    void OnPageOpen(wxCommandEvent& event);
    void OnBack(wxCommandEvent& event);
    void OnForward(wxCommandEvent& event);
    void OnProcessor(wxCommandEvent& event);

private:
     wxHtmlWindow *m_Html;
     wxHtmlProcessor *m_Processor;
 // any class wishing to process wxWindows events must use this macro
 DECLARE_EVENT_TABLE()
};


class BoldProcessor : public wxHtmlProcessor
{
    public:
        virtual wxString Process(const wxString& s) const
        {
            wxString r(s);
            r.Replace(wxT("<b>"), wxEmptyString);
            r.Replace(wxT("<B>"), wxEmptyString);
            r.Replace(wxT("</b>"), wxEmptyString);
            r.Replace(wxT("</B>"), wxEmptyString);
            return r;
        }       
};

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// IDs for the controls and the menu commands
   enum
   {
    // menu items
   Minimal_Quit = 1,
   Minimal_PageOpen,
   Minimal_Back,
   Minimal_Forward,
   Minimal_Processor,
   
    // controls start here (the numbers are, of course, arbitrary)
   Minimal_Text = 1000
   };

// ----------------------------------------------------------------------------
// event tables and other macros for wxWindows
// ----------------------------------------------------------------------------

// the event tables connect the wxWindows events with the functions (event
// handlers) which process them. It can be also done at run-time, but for the
// simple menu events like this the static method is much simpler.
   BEGIN_EVENT_TABLE(MyFrame, wxFrame)
   EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
   EVT_MENU(Minimal_PageOpen, MyFrame::OnPageOpen)
   EVT_MENU(Minimal_Back, MyFrame::OnBack)
   EVT_MENU(Minimal_Forward, MyFrame::OnForward)
   EVT_MENU(Minimal_Processor, MyFrame::OnProcessor)
   END_EVENT_TABLE()
   
   // Create a new application object: this macro will allow wxWindows to create
   // the application object during program execution (it's better than using a
   // static object for many reasons) and also declares the accessor function
   // wxGetApp() which will return the reference of the right type (i.e. MyApp and
   // not wxApp)
   IMPLEMENT_APP(MyApp)
   
   // ============================================================================
   // implementation
   // ============================================================================
   
   // ----------------------------------------------------------------------------
   // the application class
   // ----------------------------------------------------------------------------
   // `Main program' equivalent: the program execution "starts" here
   bool MyApp::OnInit()
   {
     wxLog::AddTraceMask(wxT("strconv"));
   
     wxInitAllImageHandlers();
     #if wxUSE_FS_INET && wxUSE_STREAMS && wxUSE_SOCKETS
     wxFileSystem::AddHandler(new wxInternetFSHandler);
     #endif

      SetVendorName("wxWindows");
      SetAppName("wxHtmlTest"); 
      // the following call to wxConfig::Get will use it to create an object...

    // Create the main application window
      MyFrame *frame = new MyFrame("wxHtmlWindow testing application",
         wxPoint(50, 50), wxSize(640, 480));
   
    // Show it and tell the application that it's our main window
    // @@@ what does it do exactly, in fact? is it necessary here?
      frame->Show(TRUE);
      SetTopWindow(frame);

   
    // success: wxApp::OnRun() will be called which will enter the main message
    // loop and the application will run. If we returned FALSE here, the
    // application would exit immediately.
       return TRUE;
   }

// ----------------------------------------------------------------------------
// main frame
// ----------------------------------------------------------------------------


// frame constructor
   MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
   : wxFrame((wxFrame *)NULL, -1, title, pos, size, wxDEFAULT_FRAME_STYLE, "html_test_app")
   {
    // create a menu bar
      wxMenu *menuFile = new wxMenu;
      wxMenu *menuNav = new wxMenu;

      menuFile->Append(Minimal_PageOpen, "&Open HTML page...");
      menuFile->AppendSeparator();
      menuFile->Append(Minimal_Processor, "&Remove bold attribute", "", TRUE);
      
      menuFile->AppendSeparator();
      menuFile->Append(Minimal_Quit, "&Close frame");
      menuNav->Append(Minimal_Back, "Go &BACK");
      menuNav->Append(Minimal_Forward, "Go &FORWARD");

    // now append the freshly created menu to the menu bar...
      wxMenuBar *menuBar = new wxMenuBar;
      menuBar->Append(menuFile, "&File");
      menuBar->Append(menuNav, "&Navigate");

    // ... and attach this menu bar to the frame
      SetMenuBar(menuBar);
   
      CreateStatusBar(1);

      m_Processor = new BoldProcessor;
      m_Processor->Enable(FALSE);
      m_Html = new wxHtmlWindow(this);
      m_Html->SetRelatedFrame(this, "HTML : %s");
      m_Html->SetRelatedStatusBar(0);
      m_Html->ReadCustomization(wxConfig::Get());
      m_Html->LoadPage("test.htm");
      m_Html->AddProcessor(m_Processor);
   }


// event handlers

void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
 // TRUE is to force the frame to close
 m_Html -> WriteCustomization(wxConfig::Get());
 delete wxConfig::Set(NULL);
 Close(TRUE);
}

void MyFrame::OnPageOpen(wxCommandEvent& WXUNUSED(event))
{
  wxString p = wxFileSelector(wxT("Open HTML document"), wxT(""), wxT(""), wxT(""), wxT("HTML files|*.htm"));
  if (p != wxEmptyString)
    m_Html -> LoadPage(p);
}

void MyFrame::OnBack(wxCommandEvent& WXUNUSED(event))
{
if (!m_Html -> HistoryBack()) wxMessageBox("You reached prehistory era!");
}

void MyFrame::OnForward(wxCommandEvent& WXUNUSED(event))
{
if (!m_Html -> HistoryForward()) wxMessageBox("No more items in history!");
}

void MyFrame::OnProcessor(wxCommandEvent& WXUNUSED(event))
{
    m_Processor->Enable(!m_Processor->IsEnabled());
    m_Html->LoadPage(m_Html->GetOpenedPage());
}