// Called before a plot to connect to the terminal window, if needed
void qt_connectToServer()
{
if (!qt)
return;
ensureOptionsCreated();
// Determine to which server we should connect
bool connectToWidget = !qt_option->Widget.isEmpty();
QString server = connectToWidget ? qt_option->Widget : qt->localServerName;
if (qt->socket.state() == QLocalSocket::ConnectedState)
{
// Check if we are already connected to the correct server
if (qt->socket.serverName() == server)
return;
// Otherwise disconnect
qt->socket.disconnectFromServer();
while (qt->socket.state() == QLocalSocket::ConnectedState)
qt->socket.waitForDisconnected(1000);
}
// Start the gnuplot_qt helper program if not already started
if (!connectToWidget && !qt->gnuplot_qtStarted) {
execGnuplotQt();
server = qt->localServerName;
}
// Connect to the server, or local server if not available.
qt_connectToServer(server);
}
// Helper function called by qt_connectToServer()
void qt_connectToServer(const QString& server, bool retry = true)
{
bool connectToWidget = (server != qt_localServerName);
// The QLocalSocket::waitForConnected does not respect the time out argument when the
// gnuplot_qt application is not yet started. To wait for it, we need to implement the timeout ourselves
QDateTime timeout = QDateTime::currentDateTime().addMSecs(1000);
do
{
qt_socket.connectToServer(server);
qt_socket.waitForConnected(200);
// TODO: yield CPU ?
}
while((qt_socket.state() != QLocalSocket::ConnectedState) && (QDateTime::currentDateTime() < timeout));
// Still not connected...
if ((qt_socket.state() != QLocalSocket::ConnectedState) && retry)
{
// The widget could not be reached: start a gnuplot_qt program which will create a QtGnuplotApplication
if (connectToWidget)
{
qDebug() << "Could not connect to widget" << qt_optionWidget << ". Starting a QtGnuplotApplication";
qt_optionWidget = QString();
qt_connectToServer(qt_localServerName);
}
// The gnuplot_qt program could not be reached: try to start a new one
else
{
qDebug() << "Could not connect gnuplot_qt" << qt_optionWidget << ". Starting a new one";
execGnuplotQt();
qt_connectToServer(qt_localServerName, false);
}
}
}
// Called before first plot after a set term command.
void qt_init()
{
if (qt_initialized)
return;
// If we are not connecting to an existing QtGnuplotWidget, start a QtGnuplotApplication
if (qt_optionWidget.isEmpty())
execGnuplotQt();
// Create a QApplication without event loop for QObject's that need it, namely font handling
// A better strategy would be to transfer the font handling to the QtGnuplotWidget, but it would require
// some synchronization between the widget and the gnuplot process.
int argc = 0;
QApplication* application = new QApplication(argc, (char**)( NULL));
#ifdef Q_WS_MAC
// Don't display this application in the MAC OS X dock
ProcessSerialNumber psn;
if (GetCurrentProcess(&psn) == noErr)
TransformProcessType(&psn, kProcessTransformToBackgroundApplication);
#endif
// The creation of a QApplication mangled our locale settings
#ifdef HAVE_LOCALE_H
setlocale(LC_NUMERIC, "C");
setlocale(LC_TIME, current_locale);
#endif
qt_out.setVersion(QDataStream::Qt_4_4);
qt_initialized = true;
term_interlock = (void *)qt_init;
GP_ATEXIT(qt_atexit);
}
// Called before first plot after a set term command.
void qt_init()
{
if (qt)
return;
ensureOptionsCreated();
qt = new QtGnuplotState();
// If we are not connecting to an existing QtGnuplotWidget, start a QtGnuplotApplication
if (qt_option->Widget.isEmpty())
execGnuplotQt();
#ifdef Q_WS_MAC
// Don't display this application in the MAC OS X dock
removeDockIcon();
#endif
// The creation of a QApplication mangled our locale settings
#ifdef HAVE_LOCALE_H
setlocale(LC_NUMERIC, "C");
setlocale(LC_TIME, current_locale);
#endif
qt->out.setVersion(QDataStream::Qt_4_4);
term_interlock = (void *)qt_init;
gp_atexit(qt_atexit);
}
// Helper function called by qt_connectToServer()
void qt_connectToServer(const QString& server, bool retry = true)
{
ensureOptionsCreated();
bool connectToWidget = (server != qt->localServerName);
// The QLocalSocket::waitForConnected does not respect the time out argument when
// the gnuplot_qt application is not yet started or has not yet self-initialized.
// To wait for it, we need to implement the timeout ourselves
QDateTime timeout = QDateTime::currentDateTime().addMSecs(30000);
do
{
qt->socket.connectToServer(server);
if (!qt->socket.waitForConnected(-1)) {
// qDebug() << qt->socket.errorString();
GP_SLEEP(0.2); // yield CPU for 0.2 seconds
}
}
while((qt->socket.state() != QLocalSocket::ConnectedState) && (QDateTime::currentDateTime() < timeout));
// Still not connected...
if ((qt->socket.state() != QLocalSocket::ConnectedState) && retry)
{
// The widget could not be reached: start a gnuplot_qt program which will create a QtGnuplotApplication
if (connectToWidget)
{
fprintf(stderr, "Could not connect to existing qt widget. Starting a new one.\n");
qt_option->Widget = QString();
qt_connectToServer(qt->localServerName);
}
// The gnuplot_qt program could not be reached: try to start a new one
else
{
fprintf(stderr, "Could not connect to existing gnuplot_qt. Starting a new one.\n");
execGnuplotQt();
qt_connectToServer(qt->localServerName, false);
}
}
}
