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__) || defined(__WXMAC__)
  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     // service name (DDE classes) or port number (TCP/IP based classes)
  78     wxString service = "4242";
  79
  80     // ignored under DDE, host name in TCP/IP based classes
  81     wxString hostName = "localhost";
  82
  83     if (argc > 1)
  84         service = argv[1];
  85     if (argc > 2)
  86         hostName = argv[2];
  87
  88     // Create a new client
  89     my_client = new MyClient;
  90
  91     // suppress the log messages from MakeConnection()
  92     {
  93         wxLogNull nolog;
  94         the_connection = (MyConnection *)my_client->MakeConnection(hostName, service, "IPC TEST");
  95
  96         while ( !the_connection )
  97         {
  98             if ( wxMessageBox("Failed to make connection to server.\nRetry?",
  99                               "Client Demo Error",
 100                               wxICON_ERROR | wxYES_NO | wxCANCEL ) != wxYES )
 101             {
 102                 // no server
 103                 return FALSE;
 104             }
 105
 106             the_connection = (MyConnection *)my_client->MakeConnection(hostName, service, "IPC TEST");
 107         }
 108     }
 109
 110     if (!the_connection->StartAdvise("Item"))
 111         wxMessageBox("StartAdvise failed", "Client Demo Error");
 112
 113     // Create the main frame window
 114     (new MyFrame(NULL, "Client"))->Show(TRUE);
 115
 116     return TRUE;
 117 }
 118
 119 int MyApp::OnExit()
 120 {
 121     if (the_connection)
 122     {
 123         the_connection->Disconnect();
 124         delete the_connection;
 125         the_connection = NULL;
 126     }
 127
 128     // will delete the connection too
 129     // Update: Seems it didn't delete the_connection, because there's a leak.
 130     // Deletion is now explicitly done a few lines up.
 131     delete my_client;
 132
 133
 134
 135     return 0;
 136 }
 137
 138 // Define my frame constructor
 139 MyFrame::MyFrame(wxFrame *frame, const wxString& title)
 140         : wxFrame(frame, -1, title)
 141 {
 142     panel = NULL;
 143
 144     // Give it an icon
 145     SetIcon(wxICON(mondrian));
 146
 147     // Make a menubar
 148     wxMenu *file_menu = new wxMenu;
 149
 150     file_menu->Append(CLIENT_EXECUTE, "Execute");
 151     file_menu->Append(CLIENT_REQUEST, "Request");
 152     file_menu->Append(CLIENT_POKE, "Poke");
 153     file_menu->Append(CLIENT_QUIT, "Quit");
 154
 155     wxMenuBar *menu_bar = new wxMenuBar;
 156
 157     menu_bar->Append(file_menu, "File");
 158
 159     // Associate the menu bar with the frame
 160     SetMenuBar(menu_bar);
 161
 162     // Make a panel
 163     panel = new wxPanel(this);
 164     the_list = new wxListBox(panel, CLIENT_LISTBOX, wxPoint(5, 5));
 165     the_list->Append("Apple");
 166     the_list->Append("Pear");
 167     the_list->Append("Orange");
 168     the_list->Append("Banana");
 169     the_list->Append("Fruit");
 170
 171     panel->Fit();
 172     Fit();
 173 }
 174
 175 void MyFrame::OnExecute(wxCommandEvent& event)
 176 {
 177     if (the_connection)
 178         if (!the_connection->Execute("Hello from the client!"))
 179             wxMessageBox("Execute failed", "Client Demo Error");
 180 }
 181
 182 void MyFrame::OnPoke(wxCommandEvent& event)
 183 {
 184     if (the_connection)
 185         if (!the_connection->Poke("An item", "Some data to poke at the server!"))
 186             wxMessageBox("Poke failed", "Client Demo Error");
 187 }
 188
 189 void MyFrame::OnRequest(wxCommandEvent& event)
 190 {
 191     if (the_connection)
 192     {
 193         char *data = the_connection->Request("An item");
 194         if (data)
 195             wxMessageBox(data, "Client: Request", wxOK);
 196         else
 197             wxMessageBox("Request failed", "Client Demo Error");
 198     }
 199 }
 200
 201 void MyFrame::OnExit(wxCommandEvent& event)
 202 {
 203     Close();
 204 }
 205
 206 wxConnectionBase *MyClient::OnMakeConnection()
 207 {
 208     return new MyConnection;
 209 }
 210
 211 MyConnection::MyConnection()
 212             : wxConnection(ipc_buffer, WXSIZEOF(ipc_buffer))
 213 {
 214 }
 215
 216 bool MyConnection::OnAdvise(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format)
 217 {
 218     if (the_list)
 219     {
 220         int n = the_list->FindString(data);
 221         if (n > -1)
 222             the_list->SetSelection(n);
 223     }
 224     return TRUE;
 225 }
 226
 227 bool MyConnection::OnDisconnect()
 228 {
 229     wxWindow *win = wxTheApp->GetTopWindow();
 230     if ( win )
 231         win->Destroy();
 232
 233     return TRUE;
 234 }
 235