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client.cpp
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C/C++ Source or Header
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2002-09-01
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7KB
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222 lines
/////////////////////////////////////////////////////////////////////////////
// Name: client.cpp
// Purpose: DDE sample: client
// Author: Julian Smart
// Modified by:
// Created: 25/01/99
// RCS-ID: $Id: client.cpp,v 1.11 2002/09/01 14:48:16 JS Exp $
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
// Settings common to both executables: determines whether
// we're using TCP/IP or real DDE.
#include "ddesetup.h"
#if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__)
#include "mondrian.xpm"
#endif
#include "client.h"
// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------
IMPLEMENT_APP(MyApp)
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(CLIENT_QUIT, MyFrame::OnExit)
EVT_MENU(CLIENT_EXECUTE, MyFrame::OnExecute)
EVT_MENU(CLIENT_POKE, MyFrame::OnPoke)
EVT_MENU(CLIENT_REQUEST, MyFrame::OnRequest)
END_EVENT_TABLE()
// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------
wxListBox *the_list = NULL;
MyConnection *the_connection = NULL;
MyClient *my_client;
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// MyApp
// ----------------------------------------------------------------------------
// The `main program' equivalent, creating the windows and returning the
// main frame
bool MyApp::OnInit()
{
// service name (DDE classes) or port number (TCP/IP based classes)
wxString service = IPC_SERVICE;
// ignored under DDE, host name in TCP/IP based classes
wxString hostName = "localhost";
if (argc > 1)
service = argv[1];
if (argc > 2)
hostName = argv[2];
// Create a new client
my_client = new MyClient;
// suppress the log messages from MakeConnection()
{
wxLogNull nolog;
the_connection = (MyConnection *)
my_client->MakeConnection(hostName, service, IPC_TOPIC);
while ( !the_connection )
{
if ( wxMessageBox("Failed to make connection to server.\nRetry?",
"Client Demo Error",
wxICON_ERROR | wxYES_NO | wxCANCEL ) != wxYES )
{
// no server
return FALSE;
}
the_connection = (MyConnection *)my_client->MakeConnection(hostName, service, "IPC TEST");
}
}
if (!the_connection->StartAdvise(IPC_ADVISE_NAME))
wxMessageBox("StartAdvise failed", "Client Demo Error");
// Create the main frame window
(new MyFrame(NULL, "Client"))->Show(TRUE);
return TRUE;
}
int MyApp::OnExit()
{
// will delete the connection too
// Update: Seems it didn't delete the_connection, because there's a leak.
// Deletion is now explicitly done a few lines up.
// another Update: in fact it's because OnDisconnect should delete it, but
// it wasn't
delete my_client;
return 0;
}
// Define my frame constructor
MyFrame::MyFrame(wxFrame *frame, const wxString& title)
: wxFrame(frame, -1, title, wxDefaultPosition, wxSize(300, 200))
{
// Give it an icon
SetIcon(wxICON(mondrian));
// Make a menubar
wxMenu *file_menu = new wxMenu;
file_menu->Append(CLIENT_EXECUTE, "&Execute\tCtrl-E");
file_menu->Append(CLIENT_REQUEST, "&Request\tCtrl-R");
file_menu->Append(CLIENT_POKE, "&Poke\tCtrl-P");
file_menu->Append(CLIENT_QUIT, "&Quit\tCtrl-Q");
wxMenuBar *menu_bar = new wxMenuBar;
menu_bar->Append(file_menu, "&File");
// Associate the menu bar with the frame
SetMenuBar(menu_bar);
// Make a listbox which shows the choices made in the server
the_list = new wxListBox(this, CLIENT_LISTBOX, wxPoint(5, 5));
the_list->Append("Apple");
the_list->Append("Pear");
the_list->Append("Orange");
the_list->Append("Banana");
the_list->Append("Fruit");
}
void MyFrame::OnExecute(wxCommandEvent& event)
{
if (the_connection)
if (!the_connection->Execute("Hello from the client!"))
wxMessageBox("Execute failed", "Client Demo Error");
}
void MyFrame::OnPoke(wxCommandEvent& event)
{
if (the_connection)
if (!the_connection->Poke("An item", "Some data to poke at the server!"))
wxMessageBox("Poke failed", "Client Demo Error");
}
void MyFrame::OnRequest(wxCommandEvent& event)
{
if (the_connection)
{
char *data = the_connection->Request("An item");
if (data)
wxMessageBox(data, "Client: Request", wxOK);
else
wxMessageBox("Request failed", "Client Demo Error");
}
}
void MyFrame::OnExit(wxCommandEvent& event)
{
Close();
}
wxConnectionBase *MyClient::OnMakeConnection()
{
return new MyConnection;
}
bool MyConnection::OnAdvise(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format)
{
if (the_list)
{
int n = the_list->FindString(data);
if (n > -1)
the_list->SetSelection(n);
}
return TRUE;
}
bool MyConnection::OnDisconnect()
{
// when connection is terminated, quit whole program
wxWindow *win = wxTheApp->GetTopWindow();
if ( win )
win->Destroy();
// delete self
the_connection = NULL;
return wxConnection::OnDisconnect();
}