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 SpaceInfoObserver::SpaceInfoObserver(const QUrl& url, QObject* parent) :
  25     QObject(parent),
  26     m_mountPointObserver(nullptr),
  27     m_dataSize(0),
  28     m_dataAvailable(0)
  29 {
  30     m_mountPointObserver = MountPointObserver::observerForUrl(url);
  31     m_mountPointObserver->ref();
  32     connect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  33     m_mountPointObserver->update();
  34 }
  35
  36 SpaceInfoObserver::~SpaceInfoObserver()
  37 {
  38     if (m_mountPointObserver) {
  39         m_mountPointObserver->deref();
  40         m_mountPointObserver = nullptr;
  41     }
  42 }
  43
  44 quint64 SpaceInfoObserver::size() const
  45 {
  46     return m_dataSize;
  47 }
  48
  49 quint64 SpaceInfoObserver::available() const
  50 {
  51     return m_dataAvailable;
  52 }
  53
  54 void SpaceInfoObserver::setUrl(const QUrl& url)
  55 {
  56     MountPointObserver* newObserver = MountPointObserver::observerForUrl(url);
  57     if (newObserver != m_mountPointObserver) {
  58         if (m_mountPointObserver) {
  59             disconnect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  60             m_mountPointObserver->deref();
  61             m_mountPointObserver = nullptr;
  62         }
  63
  64         m_mountPointObserver = newObserver;
  65         m_mountPointObserver->ref();
  66         connect(m_mountPointObserver, &MountPointObserver::spaceInfoChanged, this, &SpaceInfoObserver::spaceInfoChanged);
  67
  68         // If newObserver is cached it won't call update until the next timer update,
  69         // so update the observer now.
  70         m_mountPointObserver->update();
  71     }
  72 }
  73
  74 void SpaceInfoObserver::update()
  75 {
  76     if (m_mountPointObserver) {
  77         m_mountPointObserver->update();
  78     }
  79 }
  80
  81 void SpaceInfoObserver::spaceInfoChanged(quint64 size, quint64 available)
  82 {
  83     // Make sure that the size has actually changed
  84     if (m_dataSize != size || m_dataAvailable != available) {
  85         m_dataSize = size;
  86         m_dataAvailable = available;
  87
  88         emit valuesChanged();
  89     }
  90 }