apps/kinfocenter/memory/chartWidget.cpp

   1 /***************************************************************************
   2  *   KT list view item task implementation.                                *
   3  *   --------------------------------------------------------------------  *
   4  *   Copyright (C) 1999, Gary Meyer <gary@meyer.net>                       *
   5  *   --------------------------------------------------------------------  *
   6  *   This program is free software; you can redistribute it and/or modify  *
   7  *   it under the terms of the GNU General Public License as published by  *
   8  *   the Free Software Foundation; either version 2 of the License, or     *
   9  *   (at your option) any later version.                                   *
  10  ***************************************************************************/
  11
  12 #include "chartWidget.h"
  13
  14 #include <QVBoxLayout>
  15 #include <QLinearGradient>
  16 #include <QLabel>
  17 #include <QPainter>
  18 #include <QPen>
  19 #include <QColor>
  20
  21 #include <klocale.h>
  22 #include <kdebug.h>
  23 #include <kglobal.h>
  24
  25 Chart::Chart(QWidget* parent) :
  26         QWidget(parent) {
  27
  28         setSizePolicy(QSizePolicy::Minimum, QSizePolicy::MinimumExpanding);
  29
  30         memoryInfos = NULL;
  31         freeMemoryLabel = NULL;
  32 }
  33
  34
  35 void Chart::setMemoryInfos(t_memsize* memoryInfos) {
  36         this->memoryInfos = memoryInfos;
  37 }
  38
  39 void Chart::setFreeMemoryLabel(QLabel* freeMemoryLabel) {
  40         this->freeMemoryLabel = freeMemoryLabel;
  41 }
  42
  43
  44 /* Graphical Memory Display */
  45 bool Chart::drawChart(t_memsize total, const QList<t_memsize>& used, const QList<QColor>& colors, const QList<QString>& texts) {
  46
  47         QPainter paint(this);
  48
  49         QPen pen(QColor(0, 0, 0));
  50         paint.setPen(pen);
  51
  52         if (total == NO_MEMORY_INFO) {
  53                 paint.fillRect(1, 1, width() - 2, height() - 2, QBrush(QColor(128, 128, 128)));
  54                 paint.setPen(pen);
  55                 paint.drawRect(rect());
  56                 freeMemoryLabel->setText(i18n("Not available."));
  57
  58                 return false;
  59         }
  60
  61         int startline = height()-2;
  62
  63         int percent, localheight;
  64         t_memsize last_used = 0;
  65
  66         for (int count = used.size()-1; count >=0; --count) {
  67                 last_used = used.at(count);
  68                 QColor color = colors.at(count);
  69                 QString text = texts.at(count);
  70
  71                 percent = (((qint64)last_used) * 100) / total;
  72
  73                 if (count)
  74                         localheight = ((height()-2) * percent) / 100;
  75                 else
  76                         localheight = startline;
  77
  78                 //kDebug() << "Count : " <<  count << " Percent : " << percent << "%" << " Localheight:" << localheight << endl;
  79
  80                 if (localheight>0) {
  81                         QLinearGradient gradient(QPointF(1, startline), QPointF(width()-2, -localheight));
  82
  83                         QColor endProgressColor(0xFF, 0xFF, 0xFF, 100);
  84                         gradient.setColorAt(0, color);
  85                         gradient.setColorAt(1, endProgressColor);
  86                         paint.fillRect(1, startline, width()-2, -localheight, gradient);
  87
  88                         //paint.fillRect(1, startline, width()-2, -localheight, color);
  89
  90                         if (localheight >= SPACING) {
  91                                 paint.drawText(0, startline-localheight, width(), localheight, Qt::AlignCenter | Qt::TextWordWrap, QString("%1 %2%").arg(text).arg(percent));
  92                         }
  93                 }
  94
  95                 startline -= localheight;
  96
  97         }
  98
  99         // draw surrounding box
 100         QRect r = rect();
 101         qDrawShadePanel(&paint, r.x(), r.y(), r.width(), r.height(), palette(), true, 1);
 102
 103         freeMemoryLabel->setText(i18n("%1 free", formattedUnit(last_used)));
 104
 105
 106         return true;
 107 }
 108
 109
 110 QString Chart::formattedUnit(t_memsize value) {
 111         if (value > (1024 * 1024))
 112                 if (value > (1024 * 1024 * 1024))
 113                         return i18n("%1 GiB", KGlobal::locale()->formatNumber(value / (1024 * 1024 * 1024.0), 2));
 114                 else
 115                         return i18n("%1 MiB", KGlobal::locale()->formatNumber(value / (1024 * 1024.0), 2));
 116         else
 117                 return i18n("%1 KiB", KGlobal::locale()->formatNumber(value / 1024.0, 2));
 118 }
 119
 120 ChartWidget::ChartWidget(const QString& title, const QString& hint, Chart* chartImplementation, QWidget* parent) :
 121         QWidget(parent) {
 122
 123         QVBoxLayout* mainLayout = new QVBoxLayout(this);
 124
 125         titleLabel = new QLabel("<strong>" + title + "</strong>", this);
 126         titleLabel->setAlignment(Qt::AlignHCenter);
 127         titleLabel->setToolTip(hint);
 128         mainLayout->addWidget(titleLabel);
 129
 130         chart = chartImplementation;
 131         chart->setToolTip(hint);
 132         mainLayout->addWidget(chart);
 133
 134         freeMemoryLabel = new QLabel("", this);
 135         freeMemoryLabel->setAlignment(Qt::AlignHCenter);
 136         freeMemoryLabel->setToolTip(hint);
 137         mainLayout->addWidget(freeMemoryLabel);
 138
 139         chart->setFreeMemoryLabel(freeMemoryLabel);
 140 }
 141
 142 void ChartWidget::setMemoryInfos(t_memsize* memoryInfos) {
 143         chart->setMemoryInfos(memoryInfos);
 144 }
 145
 146 void ChartWidget::refresh() {
 147         //The update() method will launch paintEvent() automatically
 148         chart->update();
 149
 150 }
 151
 152