src/statusbarspaceinfo.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at) and              *
   3  *   and Patrice Tremblay                                                  *
   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     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  19  ***************************************************************************/
  20
  21 #include "statusbarspaceinfo.h"
  22
  23 #include <QtCore/QTimer>
  24 #include <QtGui/QPainter>
  25 #include <QtGui/QPaintEvent>
  26
  27 #include <kglobalsettings.h>
  28 #include <kdiskfreesp.h>
  29 #include <klocale.h>
  30 #include <kio/job.h>
  31
  32 StatusBarSpaceInfo::StatusBarSpaceInfo(QWidget* parent) :
  33     QWidget(parent),
  34     m_gettingSize(false),
  35     m_kBSize(0),
  36     m_kBAvailable(0)
  37 {
  38     setMinimumWidth(200);
  39
  40     // Update the space information each 10 seconds. Polling is useful
  41     // here, as files can be deleted/added outside the scope of Dolphin.
  42     QTimer* timer = new QTimer(this);
  43     connect(timer, SIGNAL(timeout()), this, SLOT(refresh()));
  44     timer->start(10000);
  45 }
  46
  47 StatusBarSpaceInfo::~StatusBarSpaceInfo()
  48 {
  49 }
  50
  51 void StatusBarSpaceInfo::setUrl(const KUrl& url)
  52 {
  53     m_url = url;
  54     refresh();
  55     QTimer::singleShot(300, this, SLOT(update()));
  56 }
  57
  58 void StatusBarSpaceInfo::paintEvent(QPaintEvent* /* event */)
  59 {
  60     QPainter painter(this);
  61     const int barWidth = width();
  62     const int barTop = 1;
  63     const int barHeight = height() - 5;
  64
  65     QString text;
  66
  67     const int widthDec = 3;  // visual decrement for the available width
  68
  69     const QColor c1 = palette().brush(QPalette::Background).color();
  70     const QColor c2 = KGlobalSettings::buttonTextColor();
  71     const QColor frameColor((c1.red()   + c2.red())   / 2,
  72                             (c1.green() + c2.green()) / 2,
  73                             (c1.blue()  + c2.blue())  / 2);
  74     painter.setPen(frameColor);
  75
  76     const QColor backgrColor = KGlobalSettings::baseColor();
  77     painter.setBrush(backgrColor);
  78
  79     painter.drawRect(QRect(0, barTop + 1 , barWidth - widthDec, barHeight));
  80
  81     if ((m_kBSize > 0) && (m_kBAvailable > 0)) {
  82         // draw 'used size' bar
  83         painter.setPen(Qt::NoPen);
  84         painter.setBrush(progressColor(backgrColor));
  85         int usedWidth = barWidth - static_cast<int>((m_kBAvailable *
  86                         static_cast<float>(barWidth)) / m_kBSize);
  87         const int left = 1;
  88         int right = usedWidth - widthDec;
  89         if (right < left) {
  90             right = left;
  91         }
  92         painter.drawRect(QRect(left, barTop + 2, right, barHeight - 1));
  93
  94         text = i18n("%1 free", KIO::convertSizeFromKiB(m_kBAvailable));
  95     } else {
  96         if (m_gettingSize) {
  97             text = i18n("Getting size...");
  98         } else {
  99             text = QString();
 100             QTimer::singleShot(0, this, SLOT(hide()));
 101         }
 102     }
 103
 104     // draw text
 105     painter.setPen(KGlobalSettings::textColor());
 106     painter.drawText(QRect(1, 1, barWidth - 2, barHeight + 6),
 107                      Qt::AlignCenter | Qt::TextWordWrap,
 108                      text);
 109 }
 110
 111
 112 void StatusBarSpaceInfo::slotFoundMountPoint(const unsigned long& kBSize,
 113                                              const unsigned long& kBUsed,
 114                                              const unsigned long& kBAvailable,
 115                                              const QString& mountPoint)
 116 {
 117     Q_UNUSED(kBUsed);
 118     Q_UNUSED(mountPoint);
 119
 120     m_gettingSize = false;
 121     m_kBSize = kBSize;
 122     m_kBAvailable = kBAvailable;
 123
 124     // Bypass a the issue (?) of KDiskFreeSp that for protocols like
 125     // FTP, SMB the size of root partition is returned.
 126     // TODO: check whether KDiskFreeSp is buggy or Dolphin uses it in a wrong way
 127     const QString protocol(m_url.protocol());
 128     if (!protocol.isEmpty() && (protocol != "file")) {
 129         m_kBSize = 0;
 130         m_kBAvailable = 0;
 131     }
 132
 133     update();
 134 }
 135
 136 void StatusBarSpaceInfo::showResult()
 137 {
 138     m_gettingSize = false;
 139     update();
 140 }
 141
 142 void StatusBarSpaceInfo::refresh()
 143 {
 144     m_gettingSize = true;
 145     m_kBSize = 0;
 146     m_kBAvailable = 0;
 147
 148     const QString mountPoint(KIO::findPathMountPoint(m_url.path()));
 149
 150     KDiskFreeSp* job = new KDiskFreeSp(this);
 151     connect(job, SIGNAL(foundMountPoint(const unsigned long&,
 152                                         const unsigned long&,
 153                                         const unsigned long&,
 154                                         const QString&)),
 155             this, SLOT(slotFoundMountPoint(const unsigned long&,
 156                                            const unsigned long&,
 157                                            const unsigned long&,
 158                                            const QString&)));
 159     connect(job, SIGNAL(done()),
 160             this, SLOT(showResult()));
 161
 162     job->readDF(mountPoint);
 163 }
 164
 165 QColor StatusBarSpaceInfo::progressColor(const QColor& bgColor) const
 166 {
 167     QColor color = KGlobalSettings::buttonBackground();
 168
 169     // assure that enough contrast is given between the background color
 170     // and the progressbar color
 171     int bgRed   = bgColor.red();
 172     int bgGreen = bgColor.green();
 173     int bgBlue  = bgColor.blue();
 174
 175     const int backgrBrightness = qGray(bgRed, bgGreen, bgBlue);
 176     const int progressBrightness = qGray(color.red(), color.green(), color.blue());
 177
 178     const int limit = 32;
 179     const int diff = backgrBrightness - progressBrightness;
 180     bool adjustColor = ((diff >= 0) && (diff <  limit)) ||
 181                        ((diff  < 0) && (diff > -limit));
 182     if (adjustColor) {
 183         const int inc = (backgrBrightness < 2 * limit) ? (2 * limit) : -limit;
 184         color = QColor(bgRed + inc, bgGreen + inc, bgBlue + inc);
 185     }
 186
 187     return color;
 188 }
 189
 190 #include "statusbarspaceinfo.moc"