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don't use WaitOnConnect(), it doesn't make sense to use asynchronous Connect() only to block waiting for it immediately (see #10952)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61288 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2009-07-02 16:11:12 +00:00
parent 40a983ad63
commit b2f747d8f9
1 changed files with 26 additions and 73 deletions
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99
samples/sockets/client.cpp
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@ -334,69 +334,14 @@ void MyFrame::OpenConnection(wxSockAddress::Family family)
addr->Hostname(hostname);
addr->Service(3000);
// Mini-tutorial for Connect() :-)
// ---------------------------
// we connect asynchronously and will get a wxSOCKET_CONNECTION event when
// the connection is really established
//
// There are two ways to use Connect(): blocking and non-blocking,
// depending on the value passed as the 'wait' (2nd) parameter.
//
// Connect(addr, true) will wait until the connection completes,
// returning true on success and false on failure. This call blocks
// the GUI (this might be changed in future releases to honour the
// wxSOCKET_BLOCK flag).
//
// Connect(addr, false) will issue a nonblocking connection request
// and return immediately. If the return value is true, then the
// connection has been already successfully established. If it is
// false, you must wait for the request to complete, either with
// WaitOnConnect() or by watching wxSOCKET_CONNECTION / LOST
// events (please read the documentation).
//
// WaitOnConnect() itself never blocks the GUI (this might change
// in the future to honour the wxSOCKET_BLOCK flag). This call will
// return false on timeout, or true if the connection request
// completes, which in turn might mean:
//
// a) That the connection was successfully established
// b) That the connection request failed (for example, because
// it was refused by the peer.
//
// Use IsConnected() to distinguish between these two.
//
// So, in a brief, you should do one of the following things:
//
// For blocking Connect:
//
// bool success = client->Connect(addr, true);
//
// For nonblocking Connect:
//
// client->Connect(addr, false);
//
// bool waitmore = true;
// while (! client->WaitOnConnect(seconds, millis) && waitmore )
// {
// // possibly give some feedback to the user,
// // update waitmore if needed.
// }
// bool success = client->IsConnected();
//
// And that's all :-)
// if you want to make sure that connection is established right here you
// could call WaitOnConnect(timeout) instead
wxLogMessage("Trying to connect to %s:%d", hostname, addr->Service());
m_text->AppendText(_("\nTrying to connect (timeout = 10 sec) ...\n"));
m_sock->Connect(*addr, false);
m_sock->WaitOnConnect(10);
if (m_sock->IsConnected())
m_text->AppendText(_("Succeeded ! Connection established\n"));
else
{
m_sock->Close();
m_text->AppendText(_("Failed ! Unable to connect\n"));
wxMessageBox(_("Can't connect to the specified host"), _("Alert !"));
}
UpdateStatusBar();
}
void MyFrame::OnTest1(wxCommandEvent& WXUNUSED(event))
@ -683,29 +628,38 @@ void MyFrame::OnTestURL(wxCommandEvent& WXUNUSED(event))
void MyFrame::OnSocketEvent(wxSocketEvent& event)
{
wxString s = _("OnSocketEvent: ");
switch ( event.GetSocketEvent() )
{
case wxSOCKET_INPUT:
wxLogMessage("Input available on the socket");
break;
switch(event.GetSocketEvent())
{
case wxSOCKET_INPUT : s.Append(_("wxSOCKET_INPUT\n")); break;
case wxSOCKET_LOST : s.Append(_("wxSOCKET_LOST\n")); break;
case wxSOCKET_CONNECTION : s.Append(_("wxSOCKET_CONNECTION\n")); break;
default : s.Append(_("Unexpected event !\n")); break;
}
case wxSOCKET_LOST:
wxLogMessage("Socket connection was unexpectedly lost.");
UpdateStatusBar();
break;
m_text->AppendText(s);
UpdateStatusBar();
case wxSOCKET_CONNECTION:
wxLogMessage("... socket is now connected.");
UpdateStatusBar();
break;
default:
wxLogMessage("Unknown socket event!!!");
break;
}
}
// convenience functions
void MyFrame::UpdateStatusBar()
{
#if wxUSE_STATUSBAR
wxString s;
if (!m_sock->IsConnected())
{
s.Printf(_("Not connected"));
s = "Not connected";
}
else
{
@ -716,10 +670,9 @@ void MyFrame::UpdateStatusBar()
#endif
m_sock->GetPeer(addr);
s.Printf(_("%s : %d"), (addr.Hostname()).c_str(), addr.Service());
s.Printf("%s : %d", addr.Hostname(), addr.Service());
}
#if wxUSE_STATUSBAR
SetStatusText(s, 1);
#endif // wxUSE_STATUSBAR