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wxWidgets/samples/ipc/server.cpp
Vadim Zeitlin b21348b405 don't compare bools with NULL 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@36266 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2005-11-27 14:03:36 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: server.cpp
// Purpose: IPC sample: server
// Author: Julian Smart
// Modified by: Jurgen Doornik
// Created: 25/01/99
// RCS-ID: $Id$
// 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"
#if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__)
#include "mondrian.xpm"
#endif
#include "server.h"
#include "wx/textdlg.h"
#include "wx/datetime.h"
// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------
IMPLEMENT_APP(MyApp)
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU (wxID_EXIT, MyFrame::OnExit)
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 )
END_EVENT_TABLE()
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// MyApp
// ----------------------------------------------------------------------------
bool MyApp::OnInit()
{
// Create the main frame window
m_frame = new MyFrame(NULL, _T("Server"));
m_frame->Show(true);
return true;
}
int MyApp::OnExit()
{
return 0;
}
// ----------------------------------------------------------------------------
// 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
// Give it an icon
SetIcon(wxICON(mondrian));
// Make a menubar
wxMenu *file_menu = new wxMenu;
file_menu->Append(wxID_EXIT, _T("&Quit\tCtrl-Q"));
wxMenuBar *menu_bar = new wxMenuBar;
menu_bar->Append(file_menu, _T("&File"));
// Associate the menu bar with the frame
SetMenuBar(menu_bar);
// set a dialog background
SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE));
// add the controls to the frame
wxBoxSizer *item0 = new wxBoxSizer( wxVERTICAL );
wxBoxSizer *item1 = new wxBoxSizer( wxHORIZONTAL );
wxFlexGridSizer *item2 = new wxFlexGridSizer( 2, 0, 0 );
item2->AddGrowableCol( 1 );
wxButton *item3 = new wxButton( this, ID_START, wxT("Start Server"), wxDefaultPosition, wxDefaultSize, 0 );
item2->Add( item3, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
wxString strs4[] =
{
IPC_SERVICE, _T("...")
};
wxChoice *item4 = new wxChoice( this, ID_SERVERNAME, wxDefaultPosition, wxSize(100,-1), 2, strs4, 0 );
item2->Add( item4, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
wxButton *item5 = new wxButton( this, ID_DISCONNECT, wxT("Disconnect Client"), wxDefaultPosition, wxDefaultSize, 0 );
item2->Add( item5, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
item2->Add( 20, 20, 0, wxALIGN_CENTER|wxALL, 5 );
wxButton *item6 = new wxButton( this, ID_ADVISE, wxT("Advise"), wxDefaultPosition, wxDefaultSize, 0 );
item2->Add( item6, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
item2->Add( 20, 20, 0, wxALIGN_CENTER|wxALL, 5 );
item1->Add( item2, 1, wxALIGN_CENTER|wxALL, 5 );
item0->Add( item1, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
wxStaticBox *item8 = new wxStaticBox( this, -1, wxT("Server log") );
wxStaticBoxSizer *item7 = new wxStaticBoxSizer( item8, wxVERTICAL );
wxTextCtrl *item9 = new wxTextCtrl( this, ID_LOG, wxT(""), wxDefaultPosition, wxSize(500,140), wxTE_MULTILINE );
item7->Add( item9, 1, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
item0->Add( item7, 0, wxGROW|wxALIGN_CENTER_VERTICAL|wxALL, 5 );
SetSizer( item0 );
item0->SetSizeHints( this );
// status
m_server = NULL;
GetServername()->SetSelection(0);
wxLogTextCtrl *logWindow = new wxLogTextCtrl(GetLog());
delete wxLog::SetActiveTarget(logWindow);
wxLogMessage(_T("Click on Start to start the server"));
Enable();
}
void MyFrame::Enable()
{
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)
{
if (m_server)
{
delete m_server;
m_server = NULL;
}
event.Skip();
}
void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
{
Close(true);
}
void MyFrame::OnStart(wxCommandEvent& WXUNUSED(event))
{
// Create a new server
m_server = new MyServer;
wxString servername = GetServername()->GetStringSelection();
if (m_server->Create(servername))
{
wxLogMessage(_T("Server %s started"), servername.c_str());
#if wxUSE_DDE_FOR_IPC
wxLogMessage(_T("Server uses DDE"));
#else // !wxUSE_DDE_FOR_IPC
wxLogMessage(_T("Server uses TCP"));
#endif // wxUSE_DDE_FOR_IPC/!wxUSE_DDE_FOR_IPC
}
else
{
wxLogMessage(_T("Server %s failed to start"), servername.c_str());
delete m_server;
m_server = NULL;
}
Enable();
}
void MyFrame::OnServerName( wxCommandEvent& WXUNUSED(event) )
{
if (GetServername()->GetStringSelection() == _T("..."))
{
wxString s = wxGetTextFromUser(_T("Specify the name of the server"),
_T("Server Name"), _(""), this);
if (!s.IsEmpty() && s != IPC_SERVICE)
{
GetServername()->Insert(s, 0);
GetServername()->SetSelection(0);
}
}
}
void MyFrame::Disconnect()
{
m_server->Disconnect();
Enable();
}
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(_T("OnAcceptConnection(\"%s\")"), topic.c_str());
if ( topic == IPC_TOPIC )
{
m_connection = new MyConnection();
wxGetApp().GetFrame()->Enable();
wxLogMessage(_T("Connection accepted"));
return m_connection;
}
// unknown topic
return NULL;
}
void MyServer::Disconnect()
{
if (m_connection)
{
m_connection->Disconnect();
delete m_connection;
m_connection = NULL;
wxGetApp().GetFrame()->Enable();
wxLogMessage(_T("Disconnected client"));
}
}
void MyServer::Advise()
{
if (CanAdvise())
{
wxString s = wxDateTime::Now().Format();
m_connection->Advise(m_connection->m_sAdvise, (wxChar *)s.c_str());
s = wxDateTime::Now().FormatTime() + _T(" ") + wxDateTime::Now().FormatDate();
m_connection->Advise(m_connection->m_sAdvise, (wxChar *)s.c_str(), (s.Length() + 1) * sizeof(wxChar));
#if wxUSE_DDE_FOR_IPC
wxLogMessage(_T("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];
bytes[0] = '1'; bytes[1] = '2'; bytes[2] = '3';
m_connection->Advise(m_connection->m_sAdvise, (wxChar *)bytes, 3, wxIPC_PRIVATE);
// this works, but the log treats it as a string now
// m_connection->Advise(m_connection->m_sAdvise, (wxChar *)bytes, 3, wxIPC_TEXT );
}
}
// ----------------------------------------------------------------------------
// MyConnection
// ----------------------------------------------------------------------------
MyConnection::MyConnection()
: wxConnection()
{
}
MyConnection::~MyConnection()
{
}
bool MyConnection::OnExecute(const wxString& topic,
wxChar *data, int size, wxIPCFormat format)
{
Log(_T("OnExecute"), topic, _T(""), data, size, format);
return true;
}
bool MyConnection::OnPoke(const wxString& topic,
const wxString& item, wxChar *data, int size, wxIPCFormat format)
{
Log(_T("OnPoke"), topic, item, data, size, format);
return wxConnection::OnPoke(topic, item, data, size, format);
}
wxChar *MyConnection::OnRequest(const wxString& topic,
const wxString& item, int * size, wxIPCFormat format)
{
wxChar *data;
if (item == _T("Date"))
{
m_sRequestDate = wxDateTime::Now().Format();
data = (wxChar *)m_sRequestDate.c_str();
*size = -1;
}
else if (item == _T("Date+len"))
{
m_sRequestDate = wxDateTime::Now().FormatTime() + _T(" ") + wxDateTime::Now().FormatDate();
data = (wxChar *)m_sRequestDate.c_str();
*size = (m_sRequestDate.Length() + 1) * sizeof(wxChar);
}
else if (item == _T("bytes[3]"))
{
data = (wxChar *)m_achRequestBytes;
m_achRequestBytes[0] = '1'; m_achRequestBytes[1] = '2'; m_achRequestBytes[2] = '3';
*size = 3;
}
else
{
data = NULL;
*size = 0;
}
Log(_T("OnRequest"), topic, item, data, *size, format);
return data;
}
bool MyConnection::OnStartAdvise(const wxString& topic,
const wxString& item)
{
wxLogMessage(_T("OnStartAdvise(\"%s\",\"%s\")"), topic.c_str(), item.c_str());
wxLogMessage(_T("Returning true"));
m_sAdvise = item;
wxGetApp().GetFrame()->Enable();
return true;
}
bool MyConnection::OnStopAdvise(const wxString& topic,
const wxString& item)
{
wxLogMessage(_T("OnStopAdvise(\"%s\",\"%s\")"), topic.c_str(), item.c_str());
wxLogMessage(_T("Returning true"));
m_sAdvise.Empty();
wxGetApp().GetFrame()->Enable();
return true;
}
void MyConnection::Log(const wxString& command, const wxString& topic,
const wxString& item, wxChar *data, int size, wxIPCFormat format)
{
wxString s;
if (topic.IsEmpty() && item.IsEmpty())
s.Printf(_T("%s("), command.c_str());
else if (topic.IsEmpty())
s.Printf(_T("%s(\"%s\","), command.c_str(), item.c_str());
else if (item.IsEmpty())
s.Printf(_T("%s(\"%s\","), command.c_str(), topic.c_str());
else
s.Printf(_T("%s(\"%s\",\"%s\","), command.c_str(), topic.c_str(), item.c_str());
if (format == wxIPC_TEXT || format == wxIPC_UNICODETEXT)
wxLogMessage(_T("%s\"%s\",%d)"), s.c_str(), data, size);
else if (format == wxIPC_PRIVATE)
{
if (size == 3)
{
char *bytes = (char *)data;
wxLogMessage(_T("%s'%c%c%c',%d)"), s.c_str(), bytes[0], bytes[1], bytes[2], size);
}
else
wxLogMessage(_T("%s...,%d)"), s.c_str(), size);
}
else if (format == wxIPC_INVALID)
wxLogMessage(_T("%s[invalid data],%d)"), s.c_str(), size);
}
bool MyConnection::Advise(const wxString& item, wxChar *data, int size, wxIPCFormat format)
{
Log(_T("Advise"), _T(""), item, data, size, format);
return wxConnection::Advise(item, data, size, format);
}
bool MyConnection::OnDisconnect()
{
wxLogMessage(_T("OnDisconnect()"));
wxGetApp().GetFrame()->Disconnect();
return true;
}
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