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 #include "ddesetup.h"
  34
  35 #if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__)
  36 #include "mondrian.xpm"
  37 #endif
  38
  39 #include "client.h"
  40
  41 // ----------------------------------------------------------------------------
  42 // wxWin macros
  43 // ----------------------------------------------------------------------------
  44
  45 IMPLEMENT_APP(MyApp)
  46
  47 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  48     EVT_MENU(CLIENT_QUIT, MyFrame::OnExit)
  49     EVT_MENU(CLIENT_EXECUTE, MyFrame::OnExecute)
  50     EVT_MENU(CLIENT_POKE, MyFrame::OnPoke)
  51     EVT_MENU(CLIENT_REQUEST, MyFrame::OnRequest)
  52 END_EVENT_TABLE()
  53
  54 // ----------------------------------------------------------------------------
  55 // globals
  56 // ----------------------------------------------------------------------------
  57
  58 wxListBox *the_list = NULL;
  59
  60 MyConnection *the_connection = NULL;
  61 MyClient *my_client;
  62
  63 // ============================================================================
  64 // implementation
  65 // ============================================================================
  66
  67 // ----------------------------------------------------------------------------
  68 // MyApp
  69 // ----------------------------------------------------------------------------
  70
  71 // The `main program' equivalent, creating the windows and returning the
  72 // main frame
  73 bool MyApp::OnInit()
  74 {
  75     // service name (DDE classes) or port number (TCP/IP based classes)
  76     wxString service = IPC_SERVICE;
  77
  78     // ignored under DDE, host name in TCP/IP based classes
  79     wxString hostName = "localhost";
  80
  81     if (argc > 1)
  82         service = argv[1];
  83     if (argc > 2)
  84         hostName = argv[2];
  85
  86     // Create a new client
  87     my_client = new MyClient;
  88
  89     // suppress the log messages from MakeConnection()
  90     {
  91         wxLogNull nolog;
  92         the_connection = (MyConnection *)
  93             my_client->MakeConnection(hostName, service, IPC_TOPIC);
  94
  95         while ( !the_connection )
  96         {
  97             if ( wxMessageBox("Failed to make connection to server.\nRetry?",
  98                               "Client Demo Error",
  99                               wxICON_ERROR | wxYES_NO | wxCANCEL ) != wxYES )
 100             {
 101                 // no server
 102                 return FALSE;
 103             }
 104
 105             the_connection = (MyConnection *)my_client->MakeConnection(hostName, service, "IPC TEST");
 106         }
 107     }
 108
 109     if (!the_connection->StartAdvise(IPC_ADVISE_NAME))
 110         wxMessageBox("StartAdvise failed", "Client Demo Error");
 111
 112     // Create the main frame window
 113     (new MyFrame(NULL, "Client"))->Show(TRUE);
 114
 115     return TRUE;
 116 }
 117
 118 int MyApp::OnExit()
 119 {
 120     // will delete the connection too
 121     // Update: Seems it didn't delete the_connection, because there's a leak.
 122     // Deletion is now explicitly done a few lines up.
 123     // another Update: in fact it's because OnDisconnect should delete it, but
 124     // it wasn't
 125     delete my_client;
 126
 127
 128
 129     return 0;
 130 }
 131
 132 // Define my frame constructor
 133 MyFrame::MyFrame(wxFrame *frame, const wxString& title)
 134         : wxFrame(frame, -1, title, wxDefaultPosition, wxSize(300, 200))
 135 {
 136     // Give it an icon
 137     SetIcon(wxICON(mondrian));
 138
 139     // Make a menubar
 140     wxMenu *file_menu = new wxMenu;
 141
 142     file_menu->Append(CLIENT_EXECUTE, "&Execute\tCtrl-E");
 143     file_menu->Append(CLIENT_REQUEST, "&Request\tCtrl-R");
 144     file_menu->Append(CLIENT_POKE, "&Poke\tCtrl-P");
 145     file_menu->Append(CLIENT_QUIT, "&Quit\tCtrl-Q");
 146
 147     wxMenuBar *menu_bar = new wxMenuBar;
 148
 149     menu_bar->Append(file_menu, "&File");
 150
 151     // Associate the menu bar with the frame
 152     SetMenuBar(menu_bar);
 153
 154     // Make a listbox which shows the choices made in the server
 155     the_list = new wxListBox(this, 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
 163 void MyFrame::OnExecute(wxCommandEvent& event)
 164 {
 165     if (the_connection)
 166         if (!the_connection->Execute("Hello from the client!"))
 167             wxMessageBox("Execute failed", "Client Demo Error");
 168 }
 169
 170 void MyFrame::OnPoke(wxCommandEvent& event)
 171 {
 172     if (the_connection)
 173         if (!the_connection->Poke("An item", "Some data to poke at the server!"))
 174             wxMessageBox("Poke failed", "Client Demo Error");
 175 }
 176
 177 void MyFrame::OnRequest(wxCommandEvent& event)
 178 {
 179     if (the_connection)
 180     {
 181         char *data = the_connection->Request("An item");
 182         if (data)
 183             wxMessageBox(data, "Client: Request", wxOK);
 184         else
 185             wxMessageBox("Request failed", "Client Demo Error");
 186     }
 187 }
 188
 189 void MyFrame::OnExit(wxCommandEvent& event)
 190 {
 191     Close();
 192 }
 193
 194 wxConnectionBase *MyClient::OnMakeConnection()
 195 {
 196     return new MyConnection;
 197 }
 198
 199 bool MyConnection::OnAdvise(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format)
 200 {
 201     if (the_list)
 202     {
 203         int n = the_list->FindString(data);
 204         if (n > -1)
 205             the_list->SetSelection(n);
 206     }
 207     return TRUE;
 208 }
 209
 210 bool MyConnection::OnDisconnect()
 211 {
 212     // when connection is terminated, quit whole program
 213     wxWindow *win = wxTheApp->GetTopWindow();
 214     if ( win )
 215         win->Destroy();
 216
 217     // delete self
 218     the_connection = NULL;
 219     return wxConnection::OnDisconnect();
 220 }
 221