class Color {
public:
Color(int r, int g, int b) : red(r), green(g), blue(b) {}
int getRed() { return red; }
int getGreen() { return green; }
int getBlue() { return blue; }
void setRed(int r) { red = r; }
void setGreen(int g) { green = g; }
void setBlue(int b) { blue = b; }
private:
// "callback enabled" data members
IntData red;
IntData green;
IntData blue;
};
Figure 11 chatApp.h
// chatApp.h
class ChatApp: public EosFramework
{
public:
ChatApp();
ChatApp(const ChatApp& src);
virtual ~ChatApp();
ChatApp& operator =(const ChatApp& src);
// overriden functions from the base application framework class
virtual EosObject *getFirstObject();
virtual EosAtom getClientViewName(EosClient *client);
private:
// storage for the chat strings based on messages created by remote clients
EosPrimitiveArray<EosString> fChatList;
};
Figure 12 chatApp.cpp
// chatApp.cpp
#include "stdeos.hpp"
#include <chatApp.h>
#include <chatperson.h>
// retrieves a chat person object for each client that attaches to the server .exe
EosObject *ChatApp::getFirstObject()
{
return (EosObject *)new ChatPerson(&fChatList);
}
// allows the server app to control the object and dialog name that is to be used at the applet level
// of the remote presentation
EosAtom ChatApp::getClientViewName(EosClient *client)
{
return EosAtom("ChatPerson.Chat");
}
// misc. member functions
ChatApp::ChatApp() : EosFramework(),
fChatList()
{
}
ChatApp::ChatApp(const ChatApp& src) : EosFramework(src),
fChatList(src.fChatList)
{
}
ChatApp::~ChatApp()
{
}
ChatApp& ChatApp::operator =(const ChatApp& src)
{
if (this != &src)
{
EosFramework::operator=(src);
fChatList = src.fChatList;
}
return *this;
}
Figure 13 chatperson.hpp
// chatperson.hpp
class ChatPerson: public EosObject
{
public:
ChatPerson();
ChatPerson(const ChatPerson& src);
virtual ~ChatPerson();
ChatPerson& operator =(const ChatPerson& src);
// constructor which initializes the shared chat list
ChatPerson(EosPrimitiveArray<EosString> *chatList);
// adds the user message to the chat list
void send(void);
protected:
// client message string for adding to the chat list
EosString fSendString;
// the client user name to be presented with the client's message in the chat list
EosString fName;
// a "reference" to the shared chat list initialized within the ChatPerson constructor
EosPrimitiveArrayRef<EosString> fChatList;
};Figure 14 chatperson.cpp
// chatperson.cpp
#include "stdeos.hpp"
#include <chatperson.hpp>
// performs the send which adds the client string to the chat list
void ChatPerson::send()
{
// prepare the client string and add it to the chat list
EosString theString("(" + fName + ") " + fSendString);
fChatList->add(theString);
// now clear the send string field on the client
fSendString = "";
}
// the constructor that takes a reference to the global chat list
ChatPerson::ChatPerson(EosPrimitiveArray<EosString> *chatList) : EosObject(),
fSendString(),
fName(),
// assign the shared chat list object with this client
fChatList(chatList) {}
ChatPerson::ChatPerson() : EosObject(),
fSendString(),
fName(),
fChatList() {}
ChatPerson::ChatPerson(const ChatPerson& src) : EosObject(src),
fSendString(src.fSendString),
fName(src.fName),
fChatList(src.fChatList) {}
ChatPerson::~ChatPerson() {}
ChatPerson& ChatPerson::operator =(const ChatPerson& src)
{
if (this != &src)
{
EosObject::operator=(src);
fSendString = src.fSendString;
fName = src.fName;
fChatList = src.fChatList;
}
return *this;
}
Figure 15 Java Thin Client Chat Applet
// Java File Generated By ViewSoft's Builder
// Portions Copyright (c) 1996 MSJ
package chat;
import java.applet.*;
import java.awt.*;
import java.util.*;
import viewsoft.*;
public class ChatPerson extends EosEmbeddedView
{
// this section of the generated code is used for client/server communication
// and basic object to dialog connections...
// socket port used for remote server side communication private EosPort fPort;
// information used to connect view to C++ object on the server
private EosMapperTable fIdTable;
public ChatPerson() { super(); init(); }
// data state change management hooks
public EosMapperTableEntry getProbe(int id)
{ return (EosMapperTableEntry) fIdTable.elementAt(id); }
public void removeProbe(int id) { fIdTable.removeProbe(id); }
public void setMapperTable(EosMapperTable table) { fIdTable = table; }
// port assignment
public void setPort(EosPort port) { fPort = port; }
// "resource" generation for the ChatPerson object dialogs designed in the
// builder... responds to applet request to create an instance of a
// ChatPerson dialog
public void createView(String viewName, Container shell)
{
// since an object can have multiple views a comparison is made when the
// create view function is called
if (viewName.equals("Chat"))
{
int id;
// create a geometry layout manager
EosBoxContainer eosC1 = new EosBoxContainer();
this.add(eosC1);
// propagate communication variables
eosC1.setPort(fPort);
eosC1.setMapperTable(fIdTable);
EosBoxContainer eosC2 = new EosBoxContainer();
eosC1.add(eosC2);
eosC2.setPort(fPort);
eosC2.setMapperTable(fIdTable);
// add the "Chat" label
EosLabel eosC3 = new EosLabel();
eosC2.add(eosC3);
eosC3.setProperty("Caption", new EosString("Chat"));
// add the list box for the chat list
EosListBox eosC4 = new EosListBox();
eosC2.add(eosC4);
// probe ids...used to connect dialog elements to the object running on
// the server
id = fIdTable.attachProbe(eosC4, "fInvalidate");
eosC4.setUp(fPort, "fInvalidate", id);
id = fIdTable.attachProbe(eosC4, "select");
eosC4.setUp(fPort, "select", id);
id = fIdTable.attachProbe(eosC4, "insert");
eosC4.setUp(fPort, "insert", id);
id = fIdTable.attachProbe(eosC4, "fRemove");
eosC4.setUp(fPort, "fRemove", id);
id = fIdTable.attachProbe(eosC4, "fRemoveAll");
eosC4.setUp(fPort, "fRemoveAll", id);
id = fIdTable.attachProbe(eosC4, "set");
eosC4.setUp(fPort, "set", id);
// create a row/column layout manager
EosGridContainer eosC5 = new EosGridContainer();
eosC1.add(eosC5);
// propagate communication variables
eosC5.setPort(fPort);
eosC5.setMapperTable(fIdTable);
// "My Name" label
EosLabel eosC6 = new EosLabel();
eosC5.add(eosC6);
eosC6.setProperty("Caption", new EosString("My Name:"));
// horizontal layout manager
EosBoxContainer eosC7 = new EosBoxContainer();
eosC5.add(eosC7);
eosC7.setPort(fPort);
eosC7.setMapperTable(fIdTable);
// user name edit box
EosTextField eosC8 = new EosTextField();
eosC7.add(eosC8);
// probe ids
id = fIdTable.attachProbe(eosC8, "fText");
eosC8.setUp(fPort, "fText", id);
// send button
EosButton eosC9 = new EosButton();
eosC7.add(eosC9);
// probe ids
id = fIdTable.attachProbe(eosC9, "fPressed");
eosC9.setUp(fPort, "fPressed", id);
eosC9.setProperty("Caption", new EosString("Send"));
// "Message" label
EosLabel eosC10 = new EosLabel();
eosC5.add(eosC10);
eosC10.setProperty("Caption", new EosString("Message:"));
// edit box for the client message
EosTextField eosC11 = new EosTextField();
eosC5.add(eosC11);
// probe ids
id = fIdTable.attachProbe(eosC11, "fText");
eosC11.setUp(fPort, "fText", id);
}
}
}