workspace/plasma/applets/kickoff/ui/itemdelegate.cpp

   1 /*
   2     Copyright 2007 Robert Knight <robertknight@gmail.com>
   3     Copyright 2007 Kevin Ottens <ervin@kde.org>
   4
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9
  10     This library 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 GNU
  13     Library General Public License for more details.
  14
  15     You should have received a copy of the GNU Library General Public License
  16     along with this library; see the file COPYING.LIB.  If not, write to
  17     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18     Boston, MA 02110-1301, USA.
  19 */
  20
  21 // Own
  22 #include "ui/itemdelegate.h"
  23
  24 // Qt
  25 #include <QApplication>
  26 #include <QFontMetrics>
  27 #include <QIcon>
  28 #include <QModelIndex>
  29 #include <QPainter>
  30 #include <QStyle>
  31 #include <QStyleOptionViewItem>
  32 #include <QStyleOptionProgressBar>
  33
  34 // KDE
  35 #include <KColorUtils>
  36 #include <KDebug>
  37 #include <KGlobal>
  38 #include <KGlobalSettings>
  39 #include <kcapacitybar.h>
  40
  41 // plasma
  42 #include <Plasma/Plasma>
  43
  44 using namespace Kickoff;
  45
  46 ItemDelegate::ItemDelegate(QObject *parent)
  47         : Plasma::Delegate(parent)
  48 {
  49 }
  50
  51 void ItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
  52 {
  53     Plasma::Delegate::paint(painter, option, index);
  54
  55     qreal freeSpace = -1;
  56     qreal usedSpace = -1;
  57     if (!index.data(DiskFreeSpaceRole).isNull()) {
  58         freeSpace = index.data(DiskFreeSpaceRole).value<int>() / 1024.0 / 1024.0;
  59         usedSpace = index.data(DiskUsedSpaceRole).value<int>() / 1024.0 / 1024.0;
  60     }
  61
  62
  63     // draw free space information (for drive icons)
  64     if (usedSpace >= 0) {
  65         painter->save();
  66
  67         QRect emptyRect = rectAfterTitle(option, index);
  68
  69         QSize barSize = QSize(qMin(emptyRect.width(), option.rect.width() / 3), emptyRect.height());
  70
  71         if (barSize.width() > 0) {
  72             // if the item view is gradually resized smaller or larger, make the bar fade out/in
  73             // as enough space for it becomes available
  74             if (barSize.width() < 20.0) {
  75                 painter->setOpacity(barSize.width() / 20.0);
  76             }
  77
  78             QRect spaceRect = QStyle::alignedRect(option.direction,
  79                                                   Qt::AlignRight, barSize, emptyRect);
  80
  81             if (!(option.state & (QStyle::State_Selected | QStyle::State_MouseOver | QStyle::State_HasFocus))) {
  82                 painter->setOpacity(painter->opacity() / 2.5);
  83             } else {
  84             }
  85
  86             KCapacityBar capacityBar(KCapacityBar::DrawTextInline);
  87             capacityBar.setValue((usedSpace / (freeSpace + usedSpace))*100);
  88             capacityBar.drawCapacityBar(painter, spaceRect);
  89
  90             // -- Removed the free space text because it added too much 'visual noise' to the item
  91             //
  92             // some precision is lost here, but it is acceptible given that the disk-free bar
  93             // is only shown as a guide
  94             // QString freeSpaceString = KGlobal::locale()->formatByteSize(freeSpace*1024*1024*1024);
  95             // painter->drawText(spaceRect,Qt::AlignCenter,i18n("%1 free",freeSpaceString));
  96         }
  97
  98         painter->restore();
  99     }
 100
 101 }
 102
 103 bool ItemDelegate::isVisible(const QModelIndex& index) const
 104 {
 105     Q_ASSERT(index.isValid());
 106
 107     if (index.model()->hasChildren(index)) {
 108         int childCount = index.model()->rowCount(index);
 109         for (int i = 0; i < childCount; ++i) {
 110             QModelIndex child = index.model()->index(i, 0, index);
 111             if (!child.data(UrlRole).isNull()) {
 112                 return true;
 113             }
 114         }
 115         return false;
 116     }
 117
 118     return !index.data(UrlRole).isNull();
 119 }
 120