// 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 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)
{
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);
}
}
}
// Called just before a plot is going to be displayed.
void qt_graphics()
{
ensureOptionsCreated();
qt->out << GEDesactivate;
qt_flushOutBuffer();
qt_connectToServer();
// Set text encoding
if (!(qt->codec = qt_encodingToCodec(encoding)))
qt->codec = QTextCodec::codecForLocale();
// Set font
qt->currentFontSize = qt_optionFontSize;
qt->currentFontName = qt_option->FontName;
// Set plot size
if (qt_setSize)
{
term->xmax = qt_oversampling*qt_setWidth;
term->ymax = qt_oversampling*qt_setHeight;
qt_setSize = false;
}
// Initialize window
qt->out << GESetCurrentWindow << qt_optionWindowId;
qt->out << GEInitWindow;
#ifdef _WIN32
// Let the terminal window know our PID
qt->out << GEPID << quint32(GetCurrentProcessId());
#endif
qt->out << GEActivate;
qt->out << GETitle << qt_option->Title;
qt->out << GESetCtrl << qt_optionCtrl;
qt->out << GESetWidgetSize << QSize(term->xmax, term->ymax)/qt_oversampling;
// Initialize the scene
qt->out << GESetSceneSize << QSize(term->xmax, term->ymax)/qt_oversampling;
qt->out << GEClear;
// Initialize the font
qt_sendFont();
term->v_tic = (unsigned int) (term->v_char/2.5);
term->h_tic = (unsigned int) (term->v_char/2.5);
if (qt_setPosition)
{
qt->out << GESetPosition << qt_option->position;
qt_setPosition = false;
}
}
// Called just before a plot is going to be displayed.
void qt_graphics()
{
ensureOptionsCreated();
qt->out << GEDesactivate;
qt_flushOutBuffer();
qt_connectToServer();
// Set text encoding
if (!(qt->codec = qt_encodingToCodec(encoding)))
qt->codec = QTextCodec::codecForLocale();
// Set font
qt->currentFontSize = qt_optionFontSize;
qt->currentFontName = qt_option->FontName;
// Set plot metrics
QFontMetrics metrics(QFont(qt->currentFontName, qt->currentFontSize));
term->v_char = qt_oversampling * (metrics.ascent() + metrics.descent());
term->h_char = qt_oversampling * metrics.width("0123456789")/10.;
term->v_tic = (unsigned int) (term->v_char/2.5);
term->h_tic = (unsigned int) (term->v_char/2.5);
if (qt_setSize)
{
term->xmax = qt_oversampling*qt_setWidth;
term->ymax = qt_oversampling*qt_setHeight;
qt_setSize = false;
}
// Initialize window
qt->out << GESetCurrentWindow << qt_optionWindowId;
qt->out << GEInitWindow;
qt->out << GEActivate;
qt->out << GETitle << qt_option->Title;
qt->out << GESetCtrl << qt_optionCtrl;
qt->out << GESetWidgetSize << QSize(term->xmax, term->ymax)/qt_oversampling;
// Initialize the scene
qt->out << GESetSceneSize << QSize(term->xmax, term->ymax)/qt_oversampling;
qt->out << GEClear;
// Initialize the font
qt->out << GESetFont << qt->currentFontName << qt->currentFontSize;
}
