ktimetracker/focusdetectornotifier.h

   1 /*
   2  *     Copyright (C) 2007 by Mathias Soeken <msoeken@tzi.de>
   3  *                   2007 the ktimetracker developers
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License along
  16  *   with this program; if not, write to the
  17  *      Free Software Foundation, Inc.
  18  *      51 Franklin Street, Fifth Floor
  19  *      Boston, MA  02110-1301  USA.
  20  *
  21  */
  22
  23 #ifndef KTIMETRACKER_FOCUS_DETECTOR_NOTIFIER_H
  24 #define KTIMETRACKER_FOCUS_DETECTOR_NOTIFIER_H
  25
  26 #include <QObject>
  27
  28 class FocusDetector;
  29 class TaskView;
  30
  31 /**
  32   Manages the FocusDetector for multiple TaskView instances, so only
  33   one timer is used for all.
  34
  35   It starts and stops the timer when the list of taskviews is changing, so
  36   the timer has to be stopped only iff there is no taskview left.
  37  */
  38 class FocusDetectorNotifier : public QObject
  39 {
  40   Q_OBJECT
  41
  42   public:
  43     virtual ~FocusDetectorNotifier();
  44     static FocusDetectorNotifier *instance();
  45
  46   public:
  47     void attach( TaskView *view );
  48     void detach( TaskView *view );
  49
  50     FocusDetector *focusDetector() const;
  51
  52   private:
  53     explicit FocusDetectorNotifier( QObject *parent = 0 );
  54     static FocusDetectorNotifier *mInstance;
  55
  56     //@cond PRIVATE
  57     class Private;
  58     Private *const d;
  59     //@endcond
  60 };
  61
  62 #endif // KTIMETRACKER_FOCUS_DETECTOR_NOTIFIER_H