wxWidgets/samples/html/zip/zip.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/fs_zip.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 OnBack(wxCommandEvent& event);
    void OnForward(wxCommandEvent& event);

private:
    // any class wishing to process wxWindows events must use this macro
    DECLARE_EVENT_TABLE()
};

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

// IDs for the controls and the menu commands
enum
{
    // menu items
    Minimal_Quit = 1,
    Minimal_Back,
    Minimal_Forward
};

// ----------------------------------------------------------------------------
// 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_Back, MyFrame::OnBack)
    EVT_MENU(Minimal_Forward, MyFrame::OnForward)
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()
{
#if wxUSE_LIBPNG
    wxImage::AddHandler(new wxPNGHandler);
#endif
#if wxUSE_LIBJPEG
    wxImage::AddHandler(new wxJPEGHandler);
#endif

    wxFileSystem::AddHandler(new wxZipFSHandler);

    // 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
// ----------------------------------------------------------------------------

wxHtmlWindow *html;

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

    menuFile->Append(Minimal_Quit, "E&xit");
    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);

    {
    html = new wxHtmlWindow(this);
    html -> SetRelatedFrame(this, "HTML : %s");
    html -> SetRelatedStatusBar(0);
    html -> LoadPage("start.htm");
    }
}


// event handlers

void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
    // TRUE is to force the frame to close
    Close(TRUE);
}

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

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