// Send a "Set font" event to the GUI, and wait for the font metrics answer
void qt_sendFont()
{
qt->out << GESetFont << qt->currentFontName << qt->currentFontSize;
QPair<QString, int> currentFont(qt->currentFontName, qt->currentFontSize);
static QPair<QString, int> lastFont("", 0);
// The font has not changed
if (currentFont == lastFont)
return;
static QMap<QPair<QString, int>, QPair<int, int> > fontMetricCache;
QPair<int, int> metric;
// Try to find the font metric in the cache or ask the GUI for the font metrics
if (fontMetricCache.contains(currentFont))
metric = fontMetricCache[currentFont];
else
{
qt->out << GEFontMetricRequest;
qt_flushOutBuffer();
bool receivedFontProps = false;
int waitcount = 0;
while (!receivedFontProps)
{
qt->socket.waitForReadyRead(1000);
if (qt->socket.bytesAvailable() < (int)sizeof(gp_event_t)) {
fprintf(stderr, (waitcount++ % 10 > 0) ? " ."
: "\nWarning: slow font initialization");
#ifdef Q_OS_MAC
// OSX can be slow (>30 seconds?!) in determining font metrics
// Give it more time rather than failing after 1 second
// Possibly this is only relevant to Qt5
GP_SLEEP(0.5);
continue;
#endif
return;
}
while (qt->socket.bytesAvailable() >= (int)sizeof(gp_event_t))
{
gp_event_t event;
qt->socket.read((char*) &event, sizeof(gp_event_t));
// Here, we discard other events than fontprops.
if ((event.type == GE_fontprops) && (event.par1 > 0) && (event.par2 > 0))
{
receivedFontProps = true;
metric = QPair<int, int>(event.par1, event.par2);
fontMetricCache[currentFont] = metric;
break;
}
}
}
if (waitcount > 0)
fprintf(stderr,"\n");
}
term->v_char = qt_oversampling*metric.first;
term->h_char = qt_oversampling*metric.second;
lastFont = currentFont;
}
void qt_set_cursor(int c, int x, int y)
{
// Cancel zoombox when Echap is pressed
if (c == 0)
qt_out << GEZoomStop << QString();
if (c == -4)
qt_out << GELineTo << false;
else if (c == -3)
qt_out << GELineTo << true;
else if (c == -2) // warp the pointer to the given position
qt_out << GEWrapCursor << qt_termCoord(x, y);
else if (c == -1) // start zooming
qt_out << GECursor << Qt::SizeFDiagCursor;
else if (c == 1) // Rotation
qt_out << GECursor << Qt::ClosedHandCursor;
else if (c == 2) // Rescale
qt_out << GECursor << Qt::SizeAllCursor;
else if (c == 3) // Zoom
qt_out << GECursor << Qt::SizeFDiagCursor;
else
qt_out << GECursor << Qt::CrossCursor;
qt_flushOutBuffer();
}
// Called after plotting is done
void qt_text()
{
if (qt_optionRaise)
qt_out << GERaise;
qt_out << GEDone;
qt_flushOutBuffer();
}
void qt_atexit()
{
if (qt_optionPersist || persist_cl)
qt_out << GEPersist;
else
qt_out << GEExit;
qt_flushOutBuffer();
qt_initialized = false;
}
// Display temporary text, after
// erasing any temporary text displayed previously at this location.
// The int determines where: 0=statusline, 1,2: at corners of zoom
// box, with \r separating text above and below the point.
void qt_put_tmptext(int n, const char str[])
{
if (n == 0)
qt_out << GEStatusText << QString(str);
else if (n == 1)
qt_out << GEZoomStart << QString(str);
else if (n == 2)
qt_out << GEZoomStop << QString(str);
qt_flushOutBuffer();
}
// Called after plotting is done
void qt_text()
{
if (qt_optionRaise)
{
#ifdef _WIN32
// The qt graph window is in another process and we must explicitly allow it to "raise".
AllowSetForegroundWindow(qt->pid);
#endif
qt->out << GERaise;
}
qt->out << GEDone;
qt_flushOutBuffer();
}
// 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;
}
void qt_set_clipboard(const char s[])
{
qt_out << GECopyClipboard << s;
qt_flushOutBuffer();
}
void qt_set_ruler(int x, int y)
{
qt_out << GERuler << qt_termCoord(x, y);
qt_flushOutBuffer();
}
