class TTimer: public TSysEvtHandler

 Create timer that times out in ms milliseconds. If milliSec is 0
 then the timeout will be the minimum timeout (see TSystem::ESysConstants,
 i.e. 10 ms). If mode == kTRUE then the timer is synchronous else
 a-synchronous. The default is synchronous. Add a timer to the system
 eventloop by calling TurnOn(). Set command to be executed from Notify()
 or set the object whose HandleTimer() method will be called via Notify(),
 derive from TTimer and override Notify() or connect slots to the
 signals Timeout(), TurnOn() and TurnOff().

 Create timer that times out in ms milliseconds. If mode == kTRUE then
 the timer is synchronous else a-synchronous. The default is synchronous.
 Add a timer to the system eventloop by calling TurnOn().
 The object's HandleTimer() will be called by Notify().

 Create timer that times out in ms milliseconds. If mode == kTRUE then
 the timer is synchronous else a-synchronous. The default is synchronous.
 Add a timer to the system eventloop by calling TurnOn().
 The interpreter will execute command from Notify().

 Check if timer timed out.

 Notify when timer times out. The timer is always reset. To stop
 the timer call TurnOff(). Make sure to call Reset() also in derived
 Notify() so timers will keep working repeatedly.

 Reset the timer.

 Set the interpreter command to be executed at time out. Removes the
 object to be notified (if it was set).

 Set the object to be notified  at time out. Removes the command to
 be executed (if it was set).

 When the argument is true the a-synchronous timer (SIGALRM) signal
 handler is set so that interrupted syscalls will not be restarted
 by the kernel. This is typically used in case one wants to put a
 timeout on an I/O operation. By default interrupted syscalls will
 be restarted.

 Starts the timer with a milliSec timeout. If milliSec is 0
 then the timeout will be the minimum timeout (see TSystem::ESysConstants,
 i.e. 10 ms), if milliSec is -1 then the time interval as previously
 specified (in ctor or SetTime()) will be used.
 If singleShot is kTRUE, the timer will be activated only once,
 otherwise it will continue until it is stopped.
 See also TurnOn(), Stop(), TurnOff().

 Remove timer from system timer list. This requires that a timer
 has been placed in the system timer list (using TurnOn()).
 If a TTimer subclass is placed on another list, override TurnOff() to
 remove the timer from the correct list.

 Add the timer to the system timer list. If a TTimer subclass has to be
 placed on another list, override TurnOn() to add the timer to the correct
 list.

 This static function calls a slot after a given time interval.
 Created internal timer will be deleted after that.