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CodeBlocksPortable/wxWidgets-3.0.5/samples/ipc/server.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: server.cpp
// Purpose: IPC sample: server
// Author: Julian Smart
// Modified by: Jurgen Doornik
// Created: 25/01/99
// 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 "ipcsetup.h"
#ifndef wxHAS_IMAGES_IN_RESOURCES
#include "../sample.xpm"
#endif
#include "server.h"
#include "wx/textdlg.h"
#include "wx/datetime.h"
// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------
IMPLEMENT_APP(MyApp)
wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_CLOSE( MyFrame::OnClose )
EVT_BUTTON( ID_START, MyFrame::OnStart )
EVT_CHOICE( ID_SERVERNAME, MyFrame::OnServerName )
EVT_BUTTON( ID_DISCONNECT, MyFrame::OnDisconnect )
EVT_BUTTON( ID_ADVISE, MyFrame::OnAdvise )
wxEND_EVENT_TABLE()
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// MyApp
// ----------------------------------------------------------------------------
bool MyApp::OnInit()
{
if ( !wxApp::OnInit() )
return false;
// Create the main frame window
m_frame = new MyFrame(NULL, "Server");
m_frame->Show(true);
return true;
}
// ----------------------------------------------------------------------------
// MyFrame
// ----------------------------------------------------------------------------
// Define my frame constructor
MyFrame::MyFrame(wxFrame *frame, const wxString& title)
: wxFrame(frame, wxID_ANY, title, wxDefaultPosition, wxSize(400, 300))
{
#if wxUSE_STATUSBAR
CreateStatusBar();
#endif // wxUSE_STATUSBAR
SetIcon(wxICON(sample));
m_server = NULL;
wxPanel * const panel = new wxPanel(this);
wxBoxSizer * const sizerMain = new wxBoxSizer( wxVERTICAL );
wxFlexGridSizer * const sizerCmds = new wxFlexGridSizer( 2, 0, 0 );
sizerCmds->AddGrowableCol( 1 );
wxButton *btn;
btn = new wxButton(panel, ID_START, "&Start Server");
sizerCmds->Add(btn, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5);
const wxString choices[] = { IPC_SERVICE, "..." };
wxChoice * const choice = new wxChoice
(
panel,
ID_SERVERNAME,
wxDefaultPosition, wxSize(100, -1),
WXSIZEOF(choices), choices
);
sizerCmds->Add(choice, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5);
btn = new wxButton(panel, ID_DISCONNECT, "&Disconnect Client");
sizerCmds->Add(btn, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5);
sizerCmds->AddSpacer(20);
btn = new wxButton( panel, ID_ADVISE, "&Advise");
sizerCmds->Add(btn, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5);
sizerCmds->AddSpacer(20);
sizerMain->Add(sizerCmds, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5);
wxStaticBoxSizer * const
sizerLog = new wxStaticBoxSizer(wxVERTICAL, panel, "Server &log");
wxTextCtrl * const textLog = new wxTextCtrl
(
panel,
wxID_ANY,
"",
wxDefaultPosition, wxSize(500, 140),
wxTE_MULTILINE
);
sizerLog->Add(textLog, 1, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5);
sizerMain->Add(sizerLog, 1, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5);
panel->SetSizer(sizerMain);
sizerMain->SetSizeHints(panel);
SetClientSize(panel->GetSize());
GetServername()->SetSelection(0);
wxLogTextCtrl *logWindow = new wxLogTextCtrl(textLog);
delete wxLog::SetActiveTarget(logWindow);
wxLogMessage("Click on Start to start the server");
UpdateUI();
}
void MyFrame::UpdateUI()
{
GetStart()->Enable(m_server == NULL);
GetServername()->Enable(m_server == NULL);
GetAdvise()->Enable(m_server && m_server->CanAdvise());
GetDisconnect()->Enable(m_server && m_server->IsConnected());
}
void MyFrame::OnClose(wxCloseEvent& event)
{
wxDELETE(m_server);
event.Skip();
}
void MyFrame::OnStart(wxCommandEvent& WXUNUSED(event))
{
// Create a new server
m_server = new MyServer;
wxString servername = GetServername()->GetStringSelection();
if (m_server->Create(servername))
{
wxLogMessage("Server %s started", servername);
#if wxUSE_DDE_FOR_IPC
wxLogMessage("Server uses DDE");
#else // !wxUSE_DDE_FOR_IPC
wxLogMessage("Server uses TCP");
#endif // wxUSE_DDE_FOR_IPC/!wxUSE_DDE_FOR_IPC
}
else
{
wxLogMessage("Server %s failed to start", servername);
wxDELETE(m_server);
}
UpdateUI();
}
void MyFrame::OnServerName( wxCommandEvent& WXUNUSED(event) )
{
if ( GetServername()->GetStringSelection() == "..." )
{
wxString s = wxGetTextFromUser
(
"Specify the name of the server",
"Server Name",
"",
this
);
if ( !s.empty() && s != IPC_SERVICE )
{
GetServername()->Insert(s, 0);
GetServername()->SetSelection(0);
}
}
}
void MyFrame::Disconnect()
{
m_server->Disconnect();
UpdateUI();
}
void MyFrame::OnDisconnect(wxCommandEvent& WXUNUSED(event))
{
Disconnect();
}
void MyFrame::OnAdvise(wxCommandEvent& WXUNUSED(event))
{
m_server->Advise();
}
// ----------------------------------------------------------------------------
// MyServer
// ----------------------------------------------------------------------------
MyServer::MyServer() : wxServer()
{
m_connection = NULL;
}
MyServer::~MyServer()
{
Disconnect();
}
wxConnectionBase *MyServer::OnAcceptConnection(const wxString& topic)
{
wxLogMessage("OnAcceptConnection(\"%s\")", topic);
if ( topic == IPC_TOPIC )
{
m_connection = new MyConnection();
wxGetApp().GetFrame()->UpdateUI();
wxLogMessage("Connection accepted");
return m_connection;
}
//else: unknown topic
wxLogMessage("Unknown topic, connection refused");
return NULL;
}
void MyServer::Disconnect()
{
if ( m_connection )
{
wxDELETE(m_connection);
wxGetApp().GetFrame()->UpdateUI();
wxLogMessage("Disconnected client");
}
}
void MyServer::Advise()
{
if ( CanAdvise() )
{
const wxDateTime now = wxDateTime::Now();
m_connection->Advise(m_connection->m_advise, now.Format());
const wxString s = now.FormatTime() + " " + now.FormatDate();
m_connection->Advise(m_connection->m_advise, s.mb_str(), wxNO_LEN);
#if wxUSE_DDE_FOR_IPC
wxLogMessage("DDE Advise type argument cannot be wxIPC_PRIVATE. "
"The client will receive it as wxIPC_TEXT, "
" and receive the correct no of bytes, "
"but not print a correct log entry.");
#endif
char bytes[3] = { '1', '2', '3' };
m_connection->Advise(m_connection->m_advise, bytes, 3, wxIPC_PRIVATE);
}
}
// ----------------------------------------------------------------------------
// MyConnection
// ----------------------------------------------------------------------------
bool
MyConnection::OnExecute(const wxString& topic,
const void *data,
size_t size,
wxIPCFormat format)
{
Log("OnExecute", topic, "", data, size, format);
return true;
}
bool
MyConnection::OnPoke(const wxString& topic,
const wxString& item,
const void *data,
size_t size,
wxIPCFormat format)
{
Log("OnPoke", topic, item, data, size, format);
return wxConnection::OnPoke(topic, item, data, size, format);
}
const void *
MyConnection::OnRequest(const wxString& topic,
const wxString& item,
size_t *size,
wxIPCFormat format)
{
*size = 0;
wxString s,
afterDate;
if ( item.StartsWith("Date", &afterDate) )
{
const wxDateTime now = wxDateTime::Now();
if ( afterDate.empty() )
{
s = now.Format();
*size = wxNO_LEN;
}
else if ( afterDate == "+len" )
{
s = now.FormatTime() + " " + now.FormatDate();
*size = strlen(s.mb_str()) + 1;
}
}
else if ( item == "bytes[3]" )
{
s = "123";
*size = 3;
}
if ( !*size )
{
wxLogMessage("Unknown request for \"%s\"", item);
return NULL;
}
// store the data pointer to which we return in a member variable to ensure
// that the pointer remains valid even after we return
m_requestData = s.mb_str();
const void * const data = m_requestData;
Log("OnRequest", topic, item, data, *size, format);
return data;
}
bool MyConnection::OnStartAdvise(const wxString& topic, const wxString& item)
{
wxLogMessage("OnStartAdvise(\"%s\", \"%s\")", topic, item);
wxLogMessage("Returning true");
m_advise = item;
wxGetApp().GetFrame()->UpdateUI();
return true;
}
bool MyConnection::OnStopAdvise(const wxString& topic, const wxString& item)
{
wxLogMessage("OnStopAdvise(\"%s\",\"%s\")", topic, item);
wxLogMessage("Returning true");
m_advise.clear();
wxGetApp().GetFrame()->UpdateUI();
return true;
}
bool
MyConnection::DoAdvise(const wxString& item,
const void *data,
size_t size,
wxIPCFormat format)
{
Log("Advise", "", item, data, size, format);
return wxConnection::DoAdvise(item, data, size, format);
}
bool MyConnection::OnDisconnect()
{
wxLogMessage("OnDisconnect()");
wxGetApp().GetFrame()->Disconnect();
return true;
}