samples/ipc/client.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        client.cpp
   3 // Purpose:     DDE sample: client
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     25/01/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/wx.h"
  29 #endif
  30
  31 // Settings common to both executables: determines whether
  32 // we're using TCP/IP or real DDE.
  33
  34 #include "ddesetup.h"
  35
  36 #if defined(__WXGTK__) || defined(__WXMOTIF__)
  37 #include "mondrian.xpm"
  38 #endif
  39
  40 #include "client.h"
  41
  42 // ----------------------------------------------------------------------------
  43 // wxWin macros
  44 // ----------------------------------------------------------------------------
  45
  46 IMPLEMENT_APP(MyApp)
  47
  48 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  49     EVT_MENU(CLIENT_QUIT, MyFrame::OnExit)
  50     EVT_MENU(CLIENT_EXECUTE, MyFrame::OnExecute)
  51     EVT_MENU(CLIENT_POKE, MyFrame::OnPoke)
  52     EVT_MENU(CLIENT_REQUEST, MyFrame::OnRequest)
  53 END_EVENT_TABLE()
  54
  55 // ----------------------------------------------------------------------------
  56 // globals
  57 // ----------------------------------------------------------------------------
  58
  59 char ipc_buffer[4000];
  60 wxListBox *the_list = NULL;
  61
  62 MyConnection *the_connection = NULL;
  63 MyClient *my_client ;
  64
  65 // ============================================================================
  66 // implementation
  67 // ============================================================================
  68
  69 // ----------------------------------------------------------------------------
  70 // MyApp
  71 // ----------------------------------------------------------------------------
  72
  73 // The `main program' equivalent, creating the windows and returning the
  74 // main frame
  75 bool MyApp::OnInit()
  76 {
  77     wxString server = "4242";
  78     wxString hostName = wxGetHostName();
  79
  80     if (argc > 1)
  81         server = argv[1];
  82     if (argc > 2)
  83         hostName = argv[2];
  84
  85     // Create a new client
  86     my_client = new MyClient;
  87
  88     // suppress the log messages from MakeConnection()
  89     {
  90         wxLogNull nolog;
  91         the_connection = (MyConnection *)my_client->MakeConnection(hostName, server, "IPC TEST");
  92
  93         while ( !the_connection )
  94         {
  95             if ( wxMessageBox("Failed to make connection to server.\nRetry?",
  96                               "Client Demo Error",
  97                               wxICON_ERROR | wxYES_NO | wxCANCEL ) != wxYES )
  98             {
  99                 // no server
 100                 return FALSE;
 101             }
 102
 103             the_connection = (MyConnection *)my_client->MakeConnection(hostName, server, "IPC TEST");
 104         }
 105     }
 106
 107     if (!the_connection->StartAdvise("Item"))
 108         wxMessageBox("StartAdvise failed", "Client Demo Error");
 109
 110     // Create the main frame window
 111     (new MyFrame(NULL, "Client"))->Show(TRUE);
 112
 113     return TRUE;
 114 }
 115
 116 int MyApp::OnExit()
 117 {
 118     if (the_connection)
 119     {
 120         the_connection->Disconnect();
 121     }
 122
 123     // will delete the connection too
 124     delete my_client;
 125
 126     return 0;
 127 }
 128
 129 // Define my frame constructor
 130 MyFrame::MyFrame(wxFrame *frame, const wxString& title)
 131         : wxFrame(frame, -1, title)
 132 {
 133     panel = NULL;
 134
 135     // Give it an icon
 136     SetIcon(wxICON(mondrian));
 137
 138     // Make a menubar
 139     wxMenu *file_menu = new wxMenu;
 140
 141     file_menu->Append(CLIENT_EXECUTE, "Execute");
 142     file_menu->Append(CLIENT_REQUEST, "Request");
 143     file_menu->Append(CLIENT_POKE, "Poke");
 144     file_menu->Append(CLIENT_QUIT, "Quit");
 145
 146     wxMenuBar *menu_bar = new wxMenuBar;
 147
 148     menu_bar->Append(file_menu, "File");
 149
 150     // Associate the menu bar with the frame
 151     SetMenuBar(menu_bar);
 152
 153     // Make a panel
 154     panel = new wxPanel(this);
 155     the_list = new wxListBox(panel, CLIENT_LISTBOX, wxPoint(5, 5));
 156     the_list->Append("Apple");
 157     the_list->Append("Pear");
 158     the_list->Append("Orange");
 159     the_list->Append("Banana");
 160     the_list->Append("Fruit");
 161
 162     panel->Fit();
 163     Fit();
 164 }
 165
 166 void MyFrame::OnExecute(wxCommandEvent& event)
 167 {
 168     if (the_connection)
 169         if (!the_connection->Execute("Hello from the client!"))
 170             wxMessageBox("Execute failed", "Client Demo Error");
 171 }
 172
 173 void MyFrame::OnPoke(wxCommandEvent& event)
 174 {
 175     if (the_connection)
 176         if (!the_connection->Poke("An item", "Some data to poke at the server!"))
 177             wxMessageBox("Poke failed", "Client Demo Error");
 178 }
 179
 180 void MyFrame::OnRequest(wxCommandEvent& event)
 181 {
 182     if (the_connection)
 183     {
 184         char *data = the_connection->Request("An item");
 185         if (data)
 186             wxMessageBox(data, "Client: Request", wxOK);
 187         else
 188             wxMessageBox("Request failed", "Client Demo Error");
 189     }
 190 }
 191
 192 void MyFrame::OnExit(wxCommandEvent& event)
 193 {
 194     Close();
 195 }
 196
 197 wxConnectionBase *MyClient::OnMakeConnection()
 198 {
 199     return new MyConnection;
 200 }
 201
 202 MyConnection::MyConnection()
 203             : wxConnection(ipc_buffer, WXSIZEOF(ipc_buffer))
 204 {
 205 }
 206
 207 MyConnection::~MyConnection()
 208 {
 209     the_connection = NULL;
 210 }
 211
 212 bool MyConnection::OnAdvise(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format)
 213 {
 214     if (the_list)
 215     {
 216         int n = the_list->FindString(data);
 217         if (n > -1)
 218             the_list->SetSelection(n);
 219     }
 220     return TRUE;
 221 }
 222
 223 bool MyConnection::OnDisconnect()
 224 {
 225     wxWindow *win = wxTheApp->GetTopWindow();
 226     if ( win )
 227         win->Destroy();
 228
 229     return TRUE;
 230 }
 231