src/statusbar/spaceinfoobserver.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2014 by Frank Reininghaus <frank78ac@googlemail.com>    *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  18  ***************************************************************************/
  19
  20 #include "spaceinfoobserver.h"
  21
  22 #include "mountpointobserver.h"
  23
  24 #include <QUrl>
  25
  26 SpaceInfoObserver::SpaceInfoObserver(const QUrl& url, QObject* parent) :
  27     QObject(parent),
  28     m_mountPointObserver(0),
  29     m_dataSize(0),
  30     m_dataAvailable(0)
  31 {
  32     m_mountPointObserver = MountPointObserver::observerForUrl(url);
  33     m_mountPointObserver->ref();
  34     connect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  35     m_mountPointObserver->update();
  36 }
  37
  38 SpaceInfoObserver::~SpaceInfoObserver()
  39 {
  40     if (m_mountPointObserver) {
  41         m_mountPointObserver->deref();
  42         m_mountPointObserver = 0;
  43     }
  44 }
  45
  46 quint64 SpaceInfoObserver::size() const
  47 {
  48     return m_dataSize;
  49 }
  50
  51 quint64 SpaceInfoObserver::available() const
  52 {
  53     return m_dataAvailable;
  54 }
  55
  56 void SpaceInfoObserver::setUrl(const QUrl& url)
  57 {
  58     MountPointObserver* newObserver = MountPointObserver::observerForUrl(url);
  59     if (newObserver != m_mountPointObserver) {
  60         if (m_mountPointObserver) {
  61             disconnect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  62             m_mountPointObserver->deref();
  63             m_mountPointObserver = 0;
  64         }
  65
  66         m_mountPointObserver = newObserver;
  67         m_mountPointObserver->ref();
  68         connect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  69
  70         // If newObserver is cached it won't call update until the next timer update,
  71         // so update the observer now.
  72         m_mountPointObserver->update();
  73     }
  74 }
  75
  76 void SpaceInfoObserver::spaceInfoChanged(quint64 size, quint64 available)
  77 {
  78     // Make sure that the size has actually changed
  79     if (m_dataSize != size || m_dataAvailable != available) {
  80         m_dataSize = size;
  81         m_dataAvailable = available;
  82
  83         emit valuesChanged();
  84     }
  85 }