C++ (Cpp) qt_processTermEvent Examples

Example #1

File: qt_term.cpp Project: zsx/gnuplot

int qt_waitforinput(void)
{
#ifdef USE_MOUSE
	fd_set read_fds;
	int stdin_fd  = fileno(stdin);
	int socket_fd = qt_socket.socketDescriptor();

	if (!qt_initialized || (socket_fd < 0) || (qt_socket.state() != QLocalSocket::ConnectedState))
		return getchar();

	// Gnuplot event loop
	do
	{
		// Watch file descriptors
		FD_ZERO(&read_fds);
		FD_SET(socket_fd, &read_fds);
		if (!paused_for_mouse)
			FD_SET(stdin_fd, &read_fds);

		// Wait for input
		if (select(socket_fd+1, &read_fds, NULL, NULL, NULL) < 0)
		{
			fprintf(stderr, "Qt terminal communication error: select() error\n");
			break;
		}

		// Terminal event coming
		if (FD_ISSET(socket_fd, &read_fds))
		{
			qt_socket.waitForReadyRead(-1);
			while (qt_socket.bytesAvailable() >= sizeof(gp_event_t))
			{
				struct gp_event_t event;
				qt_socket.read((char*) &event, sizeof(gp_event_t));
				/// @todo don't process mouse move events if others are in the queue
				if (qt_processTermEvent(&event))
					return '\0'; // exit from paused_for_mouse
			}
		}
	} while (paused_for_mouse || (!paused_for_mouse && !FD_ISSET(stdin_fd, &read_fds)));
#endif
	return getchar();
}

Example #2

File: qt_term.cpp Project: louri91/ED201415

int qt_waitforinput(void)
{
#ifdef USE_MOUSE
	fd_set read_fds;
	int stdin_fd  = fileno(stdin);
	int socket_fd = qt_socket.socketDescriptor();

	if (!qt_initialized || (socket_fd < 0) || (qt_socket.state() != QLocalSocket::ConnectedState))
		return getchar();

	// Gnuplot event loop
	do
	{
		// Watch file descriptors
		FD_ZERO(&read_fds);
		FD_SET(socket_fd, &read_fds);
		if (!paused_for_mouse)
			FD_SET(stdin_fd, &read_fds);

		// Wait for input
		if (select(socket_fd+1, &read_fds, NULL, NULL, NULL) < 0)
		{
			// Display the error message except when Ctrl + C is pressed
			if (errno != 4)
				fprintf(stderr, "Qt terminal communication error: select() error %i %s\n", errno, strerror(errno));
			break;
		}

		// Terminal event coming
		if (FD_ISSET(socket_fd, &read_fds))
		{
			if (!(qt_socket.waitForReadyRead(-1))) {
				// Must be a socket error; we need to restart qt_gnuplot
				qDebug() << "Error: gnuplot_qt socket not responding";
				qt_gnuplot_qtStarted = false;
				return '\0';
			}

			// Temporary event for mouse move events. If several consecutive
			// move events are received, only transmit the last one.
			gp_event_t tempEvent;
			tempEvent.type = -1;
			if (qt_socket.bytesAvailable() < sizeof(gp_event_t)) {
				qDebug() << "Error: short read from gnuplot_qt socket";
				return '\0';
			}
			while (qt_socket.bytesAvailable() >= sizeof(gp_event_t))
			{
				struct gp_event_t event;
				qt_socket.read((char*) &event, sizeof(gp_event_t));
				// Delay move events
				if (event.type == GE_motion)
					tempEvent = event;
				// Other events. Replay the last move event if present
				else
				{
					if (tempEvent.type == GE_motion)
					{
						qt_processTermEvent(&tempEvent);
						tempEvent.type = -1;
					}
					if (qt_processTermEvent(&event))
						return '\0'; // exit from paused_for_mouse
				}
			}
			// Replay move event
			if (tempEvent.type == GE_motion)
				qt_processTermEvent(&tempEvent);
		}
	} while (paused_for_mouse || (!paused_for_mouse && !FD_ISSET(stdin_fd, &read_fds)));
#endif
	return getchar();
}