diff options
Diffstat (limited to 'tqtinterface/qt4/src/kernel/tqtimer.cpp')
| -rw-r--r-- | tqtinterface/qt4/src/kernel/tqtimer.cpp | 350 |
1 files changed, 0 insertions, 350 deletions
diff --git a/tqtinterface/qt4/src/kernel/tqtimer.cpp b/tqtinterface/qt4/src/kernel/tqtimer.cpp deleted file mode 100644 index c3ddda5..0000000 --- a/tqtinterface/qt4/src/kernel/tqtimer.cpp +++ /dev/null @@ -1,350 +0,0 @@ -/**************************************************************************** -** -** Implementation of TQTimer class -** -** Created : 931111 -** -** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA. -** -** This file is part of the kernel module of the TQt GUI Toolkit. -** -** This file may be used under the terms of the GNU General -** Public License versions 2.0 or 3.0 as published by the Free -** Software Foundation and appearing in the files LICENSE.GPL2 -** and LICENSE.GPL3 included in the packaging of this file. -** Alternatively you may (at your option) use any later version -** of the GNU General Public License if such license has been -** publicly approved by Trolltech ASA (or its successors, if any) -** and the KDE Free TQt Foundation. -** -** Please review the following information to ensure GNU General -** Public Licensing requirements will be met: -** http://trolltech.com/products/qt/licenses/licensing/opensource/. -** If you are unsure which license is appropriate for your use, please -** review the following information: -** http://trolltech.com/products/qt/licenses/licensing/licensingoverview -** or contact the sales department at [email protected]. -** -** This file may be used under the terms of the Q Public License as -** defined by Trolltech ASA and appearing in the file LICENSE.TQPL -** included in the packaging of this file. Licensees holding valid TQt -** Commercial licenses may use this file in accordance with the TQt -** Commercial License Agreement provided with the Software. -** -** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, -** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted -** herein. -** -**********************************************************************/ - -#include "tqtimer.h" -#include "tqsignal.h" -#include "tqobjectlist.h" - -#ifdef USE_QT4 -#include <Qt/qtimer.h> -#endif // USE_QT4 - -/*! - \class TQTimer tqtimer.h - \brief The TQTimer class provides timer Q_SIGNALS and single-shot timers. - - \ingroup time - \ingroup events - \mainclass - - It uses \link TQTimerEvent timer events\endlink internally to - provide a more versatile timer. TQTimer is very easy to use: - create a TQTimer, call start() to start it and connect its - timeout() to the appropriate Q_SLOTS. When the time is up it will - emit the timeout() signal. - - Note that a TQTimer object is destroyed automatically when its - parent object is destroyed. - - Example: - \code - TQTimer *timer = new TQTimer( myObject ); - connect( timer, TQT_SIGNAL(timeout()), myObject, TQT_SLOT(timerDone()) ); - timer->start( 2000, TRUE ); // 2 seconds single-shot timer - \endcode - - You can also use the static singleShot() function to create a - single shot timer. - - As a special case, a TQTimer with timeout 0 times out as soon as - all the events in the window system's event queue have been - processed. - - This can be used to do heavy work while providing a snappy - user interface: - \code - TQTimer *t = new TQTimer( myObject ); - connect( t, TQT_SIGNAL(timeout()), TQT_SLOT(processOneThing()) ); - t->start( 0, FALSE ); - \endcode - - myObject->processOneThing() will be called repeatedly and should - return quickly (typically after processing one data item) so that - TQt can deliver events to widgets and stop the timer as soon as it - has done all its work. This is the traditional way of - implementing heavy work in GUI applications; multi-threading is - now becoming available on more and more platforms, and we expect - that null events will eventually be replaced by threading. - - Note that TQTimer's accuracy depends on the underlying operating - system and hardware. Most platforms support an accuracy of 20ms; - some provide more. If TQt is unable to deliver the requested - number of timer clicks, it will silently discard some. - - An alternative to using TQTimer is to call TQObject::startTimer() - for your object and reimplement the TQObject::timerEvent() event - handler in your class (which must, of course, inherit TQObject). - The disadvantage is that timerEvent() does not support such - high-level features as single-shot timers or Q_SIGNALS. - - Some operating systems limit the number of timers that may be - used; TQt tries to work around these limitations. -*/ - - -static const int INV_TIMER = -1; // invalid timer id - - -/*! - Constructs a timer called \a name, with the parent \a parent. - - Note that the parent object's destructor will destroy this timer - object. -*/ - -TQTimer::TQTimer( TQT_BASE_OBJECT_NAME *parent, const char *name ) - : TQObject( parent, name ), id(INV_TIMER), single(0), nulltimer(0) -{ -} - -/*! - Destroys the timer. -*/ - -TQTimer::~TQTimer() -{ - if ( id != INV_TIMER ) // stop running timer - stop(); -} - - -/*! - \fn void TQTimer::timeout() - - This signal is emitted when the timer is activated. -*/ - -/*! - \fn bool TQTimer::isActive() const - - Returns TRUE if the timer is running (pending); otherwise returns - FALSE. -*/ - -/*! - \fn int TQTimer::timerId() const - - Returns the ID of the timer if the timer is running; otherwise returns - -1. -*/ - - -/*! - Starts the timer with a \a msec milliseconds timeout, and returns - the ID of the timer, or zero when starting the timer failed. - - If \a sshot is TRUE, the timer will be activated only once; - otherwise it will continue until it is stopped. - - Any pending timer will be stopped. - - \sa singleShot() stop(), changeInterval(), isActive() -*/ - -int TQTimer::start( int msec, bool sshot ) -{ - if ( id >=0 && nulltimer && !msec && sshot ) - return id; - if ( id != INV_TIMER ) // stop running timer - stop(); - single = sshot; - nulltimer = ( !msec && sshot ); - return id = startTimer( msec ); -} - - -/*! - Changes the timeout interval to \a msec milliseconds. - - If the timer signal is pending, it will be stopped and restarted; - otherwise it will be started. - - \sa start(), isActive() -*/ - -void TQTimer::changeInterval( int msec ) -{ - if ( id == INV_TIMER ) { // create new timer - start( msec ); - } else { - killTimer( id ); // restart timer - id = startTimer( msec ); - } -} - -/*! - Stops the timer. - - \sa start() -*/ - -void TQTimer::stop() -{ - if ( id != INV_TIMER ) { - killTimer( id ); - id = INV_TIMER; - } -} - - -/*! - \reimp -*/ -bool TQTimer::event( TQEvent *e ) -{ - if ( e->type() != TQEvent::Timer ) // ignore all other events - return FALSE; - if ( single ) // stop single shot timer - stop(); - emit timeout(); // emit timeout signal - return TRUE; -} - - -/* - The TQSingleShotTimer class is an internal class for implementing - TQTimer::singleShot(). It starts a timer and emits the signal - and kills itself when it gets the timeout. -*/ - -static TQObjectList *sst_list = 0; // list of single shot timers - -static void sst_cleanup() -{ - if ( sst_list ) { - sst_list->setAutoDelete( TRUE ); - delete sst_list; - sst_list = 0; - } -} - -static void sst_init() -{ - if ( !sst_list ) { - sst_list = new TQObjectList; - TQ_CHECK_PTR( sst_list ); - qAddPostRoutine( sst_cleanup ); - } -} - - -class TQSingleShotTimer : public TQObject -{ -public: - ~TQSingleShotTimer(); - bool start( int msec, TQT_BASE_OBJECT_NAME *r, const char * m ); - bool isActive() const { return timerId > 0; } -protected: - bool event( TQEvent * ); -private: - TQSignal signal; - int timerId; -}; - -extern int qStartTimer( int interval, TQObject *obj ); // implemented in qapp_xxx.cpp -extern bool qKillTimer( int id ); - -TQSingleShotTimer::~TQSingleShotTimer() -{ - if (timerId != 0) { - qKillTimer(timerId); - timerId = 0; - } -} - -bool TQSingleShotTimer::start( int msec, TQT_BASE_OBJECT_NAME *r, const char *m ) -{ - timerId = 0; - if ( signal.connect(TQT_TQOBJECT(r), m) ) - timerId = qStartTimer( msec, TQT_TQOBJECT(this) ); - return timerId != 0; -} - -bool TQSingleShotTimer::event( TQEvent * ) -{ - qKillTimer( timerId ); // no more timeouts - signal.activate(); // emit the signal - signal.disconnect( 0, 0 ); - timerId = 0; // mark as inactive - return TRUE; -} - - -/*! - This static function calls a slot after a given time interval. - - It is very convenient to use this function because you do not need - to bother with a \link TQObject::timerEvent() timerEvent\endlink or - to create a local TQTimer object. - - Example: - \code - #include <tqapplication.h> - #include <tqtimer.h> - - int main( int argc, char **argv ) - { - TQApplication a( argc, argv ); - TQTimer::singleShot( 10*60*1000, &a, TQT_SLOT(quit()) ); - ... // create and show your widgets - return a.exec(); - } - \endcode - - This sample program automatically terminates after 10 minutes (i.e. - 600000 milliseconds). - - The \a receiver is the receiving object and the \a member is the - slot. The time interval is \a msec. -*/ - -#ifdef USE_QT4 -void TQTimer::singleShot( int msec, TQT_BASE_OBJECT_NAME *receiver, const char *member ) -{ - // Cheat! - QTimer::singleShot(msec, receiver, member); -} -#else // USE_QT4 -void TQTimer::singleShot( int msec, TQT_BASE_OBJECT_NAME *receiver, const char *member ) -{ - if ( !sst_list ) - sst_init(); - // search the list for a free ss timer we could reuse - TQSingleShotTimer *sst = (TQSingleShotTimer*)sst_list->first(); - while ( sst && sst->isActive() ) - sst = (TQSingleShotTimer*)sst_list->next(); - // create a new one if not successful - if ( !sst ) { - sst = new TQSingleShotTimer; - sst_list->append( sst ); - } - sst->start(msec, receiver, member); -} -#endif // USE_QT4 |