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 <QPainter>
  24 #include <QPaintEvent>
  25 #include <QTimer>
  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 void StatusBarSpaceInfo::setUrl(const KUrl& url)
  51 {
  52     m_url = url;
  53     refresh();
  54     QTimer::singleShot(300, this, SLOT(update()));
  55 }
  56
  57 void StatusBarSpaceInfo::paintEvent(QPaintEvent* /* event */)
  58 {
  59     QPainter painter(this);
  60     const int barWidth = width();
  61     const int barTop = 1;
  62     const int barHeight = height() - 5;
  63
  64     QString text;
  65
  66     const int widthDec = 3;  // visual decrement for the available width
  67
  68     const QColor c1 = palette().brush(QPalette::Background).color();
  69     const QColor c2 = KGlobalSettings::buttonTextColor();
  70     const QColor frameColor((c1.red()   + c2.red())   / 2,
  71                             (c1.green() + c2.green()) / 2,
  72                             (c1.blue()  + c2.blue())  / 2);
  73     painter.setPen(frameColor);
  74
  75     const QColor backgrColor = KGlobalSettings::baseColor();
  76     painter.setBrush(backgrColor);
  77
  78     painter.drawRect(QRect(0, barTop + 1 , barWidth - widthDec, barHeight));
  79
  80     if ((m_kBSize > 0) && (m_kBAvailable > 0)) {
  81         // draw 'used size' bar
  82         painter.setPen(Qt::NoPen);
  83         painter.setBrush(progressColor(backgrColor));
  84         int usedWidth = barWidth - static_cast<int>((m_kBAvailable *
  85                         static_cast<float>(barWidth)) / m_kBSize);
  86         const int left = 1;
  87         int right = usedWidth - widthDec;
  88         if (right < left) {
  89             right = left;
  90         }
  91         painter.drawRect(QRect(left, barTop + 2, right, barHeight - 1));
  92
  93         text = i18n("%1 free", KIO::convertSizeFromKiB(m_kBAvailable));
  94     } else {
  95         if (m_gettingSize) {
  96             text = i18n("Getting size...");
  97         } else {
  98             text = QString();
  99             QTimer::singleShot(0, this, SLOT(hide()));
 100         }
 101     }
 102
 103     // draw text
 104     painter.setPen(KGlobalSettings::textColor());
 105     painter.drawText(QRect(1, 1, barWidth - 2, barHeight + 6),
 106                      Qt::AlignCenter | Qt::TextWordWrap,
 107                      text);
 108 }
 109
 110
 111 void StatusBarSpaceInfo::slotFoundMountPoint(const unsigned long& kBSize,
 112         const unsigned long& /* kBUsed */,
 113         const unsigned long& kBAvailable,
 114         const QString& /* mountPoint */)
 115 {
 116     m_gettingSize = false;
 117     m_kBSize = kBSize;
 118     m_kBAvailable = kBAvailable;
 119
 120     // Bypass a the issue (?) of KDiskFreeSp that for protocols like
 121     // FTP, SMB the size of root partition is returned.
 122     // TODO: check whether KDiskFreeSp is buggy or Dolphin uses it in a wrong way
 123     const QString protocol(m_url.protocol());
 124     if (!protocol.isEmpty() && (protocol != "file")) {
 125         m_kBSize = 0;
 126         m_kBAvailable = 0;
 127     }
 128
 129     update();
 130 }
 131
 132 void StatusBarSpaceInfo::showResult()
 133 {
 134     m_gettingSize = false;
 135     update();
 136 }
 137
 138 void StatusBarSpaceInfo::refresh()
 139 {
 140     m_gettingSize = true;
 141     m_kBSize = 0;
 142     m_kBAvailable = 0;
 143
 144     const QString mountPoint(KIO::findPathMountPoint(m_url.path()));
 145
 146     KDiskFreeSp* job = new KDiskFreeSp(this);
 147     connect(job, SIGNAL(foundMountPoint(const unsigned long&,
 148                                         const unsigned long&,
 149                                         const unsigned long&,
 150                                         const QString&)),
 151             this, SLOT(slotFoundMountPoint(const unsigned long&,
 152                                            const unsigned long&,
 153                                            const unsigned long&,
 154                                            const QString&)));
 155     connect(job, SIGNAL(done()),
 156             this, SLOT(showResult()));
 157
 158     job->readDF(mountPoint);
 159 }
 160
 161 QColor StatusBarSpaceInfo::progressColor(const QColor& bgColor) const
 162 {
 163     QColor color = KGlobalSettings::buttonBackground();
 164
 165     // assure that enough contrast is given between the background color
 166     // and the progressbar color
 167     int bgRed   = bgColor.red();
 168     int bgGreen = bgColor.green();
 169     int bgBlue  = bgColor.blue();
 170
 171     const int backgrBrightness = qGray(bgRed, bgGreen, bgBlue);
 172     const int progressBrightness = qGray(color.red(), color.green(), color.blue());
 173
 174     const int limit = 32;
 175     const int diff = backgrBrightness - progressBrightness;
 176     bool adjustColor = ((diff >= 0) && (diff <  limit)) ||
 177                        ((diff  < 0) && (diff > -limit));
 178     if (adjustColor) {
 179         const int inc = (backgrBrightness < 2 * limit) ? (2 * limit) : -limit;
 180         color = QColor(bgRed + inc, bgGreen + inc, bgBlue + inc);
 181     }
 182
 183     return color;
 184 }
 185
 186 #include "statusbarspaceinfo.moc"