wxWidgets/samples/html/help/help.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: test.cpp
// Purpose: wxHtml testing example
/////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation "help.cpp"
#pragma interface "help.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/wxhtml.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 OnHelp(wxCommandEvent& event);
private:
wxHtmlHelpController help;
wxConfig* config;
// 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_Help
};
// ----------------------------------------------------------------------------
// 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_Help, MyFrame::OnHelp)
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
// Create the main application window
MyFrame *frame = new MyFrame("HTML Help Sample",
wxPoint(50, 50), wxSize(150, 50));
// 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), help()
{
// create a menu bar
wxMenu *menuFile = new wxMenu;
menuFile->Append(Minimal_Help, "&Help");
menuFile->Append(Minimal_Quit, "E&xit");
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menuFile, "&File");
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
config = new wxConfig("wxHTMLhelp");
help.UseConfig(config);
help.AddBook("helpfiles/testing.hhp");
}
// event handlers
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
// TRUE is to force the frame to close
delete config;
Close(TRUE);
}
void MyFrame::OnHelp(wxCommandEvent& WXUNUSED(event))
{
help.Display("Main page");
}