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(__WXX11__) || 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 = IPC_SERVICE;
  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 *)
  95             my_client->MakeConnection(hostName, service, IPC_TOPIC);
  96
  97         while ( !the_connection )
  98         {
  99             if ( wxMessageBox("Failed to make connection to server.\nRetry?",
 100                               "Client Demo Error",
 101                               wxICON_ERROR | wxYES_NO | wxCANCEL ) != wxYES )
 102             {
 103                 // no server
 104                 return FALSE;
 105             }
 106
 107             the_connection = (MyConnection *)my_client->MakeConnection(hostName, service, "IPC TEST");
 108         }
 109     }
 110
 111     if (!the_connection->StartAdvise(IPC_ADVISE_NAME))
 112         wxMessageBox("StartAdvise failed", "Client Demo Error");
 113
 114     // Create the main frame window
 115     (new MyFrame(NULL, "Client"))->Show(TRUE);
 116
 117     return TRUE;
 118 }
 119
 120 int MyApp::OnExit()
 121 {
 122     if (the_connection)
 123     {
 124         the_connection->Disconnect();
 125         delete the_connection;
 126         the_connection = NULL;
 127     }
 128
 129     // will delete the connection too
 130     // Update: Seems it didn't delete the_connection, because there's a leak.
 131     // Deletion is now explicitly done a few lines up.
 132     delete my_client;
 133
 134
 135
 136     return 0;
 137 }
 138
 139 // Define my frame constructor
 140 MyFrame::MyFrame(wxFrame *frame, const wxString& title)
 141         : wxFrame(frame, -1, title, wxDefaultPosition, wxSize(300, 200))
 142 {
 143     // Give it an icon
 144     SetIcon(wxICON(mondrian));
 145
 146     // Make a menubar
 147     wxMenu *file_menu = new wxMenu;
 148
 149     file_menu->Append(CLIENT_EXECUTE, "&Execute\tCtrl-E");
 150     file_menu->Append(CLIENT_REQUEST, "&Request\tCtrl-R");
 151     file_menu->Append(CLIENT_POKE, "&Poke\tCtrl-P");
 152     file_menu->Append(CLIENT_QUIT, "&Quit\tCtrl-Q");
 153
 154     wxMenuBar *menu_bar = new wxMenuBar;
 155
 156     menu_bar->Append(file_menu, "&File");
 157
 158     // Associate the menu bar with the frame
 159     SetMenuBar(menu_bar);
 160
 161     // Make a listbox which shows the choices made in the server
 162     the_list = new wxListBox(this, CLIENT_LISTBOX, wxPoint(5, 5));
 163     the_list->Append("Apple");
 164     the_list->Append("Pear");
 165     the_list->Append("Orange");
 166     the_list->Append("Banana");
 167     the_list->Append("Fruit");
 168 }
 169
 170 void MyFrame::OnExecute(wxCommandEvent& event)
 171 {
 172     if (the_connection)
 173         if (!the_connection->Execute("Hello from the client!"))
 174             wxMessageBox("Execute failed", "Client Demo Error");
 175 }
 176
 177 void MyFrame::OnPoke(wxCommandEvent& event)
 178 {
 179     if (the_connection)
 180         if (!the_connection->Poke("An item", "Some data to poke at the server!"))
 181             wxMessageBox("Poke failed", "Client Demo Error");
 182 }
 183
 184 void MyFrame::OnRequest(wxCommandEvent& event)
 185 {
 186     if (the_connection)
 187     {
 188         char *data = the_connection->Request("An item");
 189         if (data)
 190             wxMessageBox(data, "Client: Request", wxOK);
 191         else
 192             wxMessageBox("Request failed", "Client Demo Error");
 193     }
 194 }
 195
 196 void MyFrame::OnExit(wxCommandEvent& event)
 197 {
 198     Close();
 199 }
 200
 201 wxConnectionBase *MyClient::OnMakeConnection()
 202 {
 203     return new MyConnection;
 204 }
 205
 206 MyConnection::MyConnection()
 207             : wxConnection(ipc_buffer, WXSIZEOF(ipc_buffer))
 208 {
 209 }
 210
 211 bool MyConnection::OnAdvise(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format)
 212 {
 213     if (the_list)
 214     {
 215         int n = the_list->FindString(data);
 216         if (n > -1)
 217             the_list->SetSelection(n);
 218     }
 219     return TRUE;
 220 }
 221
 222 bool MyConnection::OnDisconnect()
 223 {
 224     wxWindow *win = wxTheApp->GetTopWindow();
 225     if ( win )
 226         win->Destroy();
 227
 228     return TRUE;
 229 }
 230