wxWidgets/samples/help/demo.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: minimal.cpp
// Purpose: Minimal wxWindows sample
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "minimal.cpp"
#pragma interface "minimal.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/helpbase.h"
#include "wx/help.h"
// ----------------------------------------------------------------------------
// ressources
// ----------------------------------------------------------------------------
// the application icon
#if defined(__WXGTK__) || defined(__WXMOTIF__)
#include "mondrian.xpm"
#endif
// ----------------------------------------------------------------------------
// 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:
wxHelpController help;
// 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_Index,
Minimal_Help_Classes,
Minimal_Help_Functions,
Minimal_Help_Help,
Minimal_Help_KDE,
Minimal_Help_GNOME,
Minimal_Help_Netscape,
Minimal_Help_Search,
// 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_Help_Index, MyFrame::OnHelp)
EVT_MENU(Minimal_Help_Classes, MyFrame::OnHelp)
EVT_MENU(Minimal_Help_Functions, MyFrame::OnHelp)
EVT_MENU(Minimal_Help_Help, MyFrame::OnHelp)
EVT_MENU(Minimal_Help_KDE, MyFrame::OnHelp)
EVT_MENU(Minimal_Help_GNOME, MyFrame::OnHelp)
EVT_MENU(Minimal_Help_Netscape, MyFrame::OnHelp)
EVT_MENU(Minimal_Help_Search, 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()
{
// Create the main application window
MyFrame *frame = new MyFrame("Minimal wxWindows App",
wxPoint(50, 50), wxSize(450, 340));
// 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)
{
// set the frame icon
SetIcon(wxICON(mondrian));
// create a menu bar
wxMenu *menuFile = new wxMenu;
menuFile->Append(Minimal_Help_Index, "&Help Index...");
menuFile->Append(Minimal_Help_Classes, "&Help on Classes...");
menuFile->Append(Minimal_Help_Functions, "&Help on Functions...");
menuFile->Append(Minimal_Help_Help, "&About wxExtHelpController...");
menuFile->AppendSeparator();
menuFile->Append(Minimal_Help_Search, "&Search help...");
if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
{
menuFile->AppendSeparator();
menuFile->Append(Minimal_Help_KDE, "Use &KDE");
menuFile->Append(Minimal_Help_GNOME, "Use &GNOME");
menuFile->Append(Minimal_Help_Netscape, "Use &Netscape");
}
menuFile->AppendSeparator();
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);
// create a status bar just for fun (by default with 1 pane only)
CreateStatusBar();
SetStatusText("Welcome to wxWindows!");
// now create some controls
// a panel first - if there were several controls, it would allow us to
// navigate between them from the keyboard
wxPanel *panel = new wxPanel(this, -1, wxPoint(0, 0), wxSize(400, 200));
// and a static control whose parent is the panel
(void)new wxStaticText(panel, -1, "Hello, world!", wxPoint(10, 10));
// initialise the help system
help.Initialize("doc");
}
// event handlers
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
// TRUE is to force the frame to close
Close(TRUE);
}
void MyFrame::OnHelp(wxCommandEvent& event)
{
switch(event.GetId())
{
case Minimal_Help_Classes:
help.DisplaySection(1);
break;
case Minimal_Help_Functions:
help.DisplaySection(2);
break;
case Minimal_Help_Help:
help.DisplaySection(5);
break;
case Minimal_Help_KDE:
if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
((wxExtHelpController *)&help)->SetBrowser("kdehelp");
break;
case Minimal_Help_GNOME:
if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
((wxExtHelpController *)&help)->SetBrowser("gnome-help-browser");
break;
case Minimal_Help_Netscape:
if(help.IsKindOf(CLASSINFO(wxExtHelpController)))
((wxExtHelpController *)&help)->SetBrowser("netscape",TRUE);
break;
case Minimal_Help_Search:
{
wxString key = wxGetTextFromUser("Search for?",
"Search help for keyword",
"",
this);
if(! key.IsEmpty())
help.KeywordSearch(key);
}
break;
case Minimal_Help_Index:
default:
help.DisplayContents();
break;
}
}