src/panels/places/placesitemlistwidget.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2012 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "placesitemlistwidget.h"
   8
   9 #include <QStyleOption>
  10 #include <QPainter>
  11
  12 #include <KColorScheme>
  13
  14 #include <KIO/FileSystemFreeSpaceJob>
  15 #include <Solid/Device>
  16 #include <Solid/NetworkShare>
  17
  18 #define CAPACITYBAR_HEIGHT 2
  19 #define CAPACITYBAR_MARGIN 2
  20 #define CAPACITYBAR_CACHE_TTL 60000
  21
  22
  23 PlacesItemListWidget::PlacesItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent) :
  24     KStandardItemListWidget(informant, parent)
  25     , m_drawCapacityBar(false)
  26 {
  27 }
  28
  29 PlacesItemListWidget::~PlacesItemListWidget()
  30 {
  31 }
  32
  33 bool PlacesItemListWidget::isHidden() const
  34 {
  35     return data().value("isHidden").toBool() ||
  36            data().value("isGroupHidden").toBool();
  37 }
  38
  39 QPalette::ColorRole PlacesItemListWidget::normalTextColorRole() const
  40 {
  41     return QPalette::WindowText;
  42 }
  43
  44 void PlacesItemListWidget::updateCapacityBar()
  45 {
  46     const QString udi = data().value("udi").toString();
  47     if (udi.isEmpty()) {
  48         resetCapacityBar();
  49         return;
  50     }
  51     const Solid::Device device = Solid::Device(udi);
  52     if (device.isDeviceInterface(Solid::DeviceInterface::NetworkShare)
  53             || device.isDeviceInterface(Solid::DeviceInterface::OpticalDrive)
  54             || device.isDeviceInterface(Solid::DeviceInterface::OpticalDisc)) {
  55         resetCapacityBar();
  56         return;
  57     }
  58     const QUrl url = data().value("url").toUrl();
  59
  60     if (url.isEmpty() || m_freeSpaceInfo.job || !m_freeSpaceInfo.lastUpdated.hasExpired()) {
  61         // No url, job running or cache is still valid.
  62         return;
  63     }
  64
  65     m_freeSpaceInfo.job = KIO::fileSystemFreeSpace(url);
  66     connect(
  67         m_freeSpaceInfo.job,
  68         &KIO::FileSystemFreeSpaceJob::result,
  69         this,
  70         [this](KIO::Job *job, KIO::filesize_t size, KIO::filesize_t available) {
  71             // even if we receive an error we want to refresh lastUpdated to avoid repeatedly querying in this case
  72             m_freeSpaceInfo.lastUpdated.setRemainingTime(CAPACITYBAR_CACHE_TTL);
  73
  74             if (job->error()) {
  75                 return;
  76             }
  77
  78             m_freeSpaceInfo.size = size;
  79             m_freeSpaceInfo.used = size - available;
  80             m_freeSpaceInfo.usedRatio = (qreal)m_freeSpaceInfo.used / (qreal)m_freeSpaceInfo.size;
  81             m_drawCapacityBar = size > 0;
  82
  83             update();
  84         }
  85     );
  86 }
  87
  88 void PlacesItemListWidget::resetCapacityBar()
  89 {
  90     m_drawCapacityBar = false;
  91     delete m_freeSpaceInfo.job;
  92     m_freeSpaceInfo.lastUpdated.setRemainingTime(0);
  93     m_freeSpaceInfo.size = 0;
  94     m_freeSpaceInfo.used = 0;
  95     m_freeSpaceInfo.usedRatio = 0;
  96 }
  97
  98 void PlacesItemListWidget::polishEvent()
  99 {
 100     updateCapacityBar();
 101
 102     QGraphicsWidget::polishEvent();
 103 }
 104
 105 void PlacesItemListWidget::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 106 {
 107     KStandardItemListWidget::paint(painter, option, widget);
 108
 109     // We check if option=nullptr since it is null when the place is dragged (Bug #430441)
 110     if (m_drawCapacityBar && option) {
 111         const TextInfo* textInfo = m_textInfo.value("text");
 112         if (textInfo) { // See KStandarItemListWidget::paint() for info on why we check textInfo.
 113             painter->save();
 114
 115             const QRect capacityRect(
 116                 textInfo->pos.x(),
 117                 option->rect.top() + option->rect.height() - CAPACITYBAR_HEIGHT - CAPACITYBAR_MARGIN,
 118                 qMin((qreal)option->rect.width(), selectionRect().width()) - (textInfo->pos.x() - option->rect.left()),
 119                 CAPACITYBAR_HEIGHT
 120             );
 121
 122             const QPalette pal = palette();
 123             const QPalette::ColorGroup group = isActiveWindow() ? QPalette::Active : QPalette::Inactive;
 124
 125             // Background
 126             const QColor bgColor = isSelected()
 127                 ? pal.color(group, QPalette::Highlight).darker(180)
 128                 : pal.color(group, QPalette::Window).darker(120);
 129
 130             painter->fillRect(capacityRect, bgColor);
 131
 132             // Fill
 133             const QRect fillRect(capacityRect.x(), capacityRect.y(), capacityRect.width() * m_freeSpaceInfo.usedRatio, capacityRect.height());
 134             if (m_freeSpaceInfo.usedRatio >= 0.95) { // More than 95% full!
 135                 const QColor dangerUsedColor = KColorScheme(group, KColorScheme::View).foreground(KColorScheme::NegativeText).color();
 136                 painter->fillRect(fillRect, dangerUsedColor);
 137             } else {
 138                 const QPalette::ColorRole role = isSelected() ? QPalette::HighlightedText : QPalette::Highlight;
 139                 const QColor normalUsedColor = styleOption().palette.color(group, role);
 140                 painter->fillRect(fillRect, normalUsedColor);
 141             }
 142
 143             painter->restore();
 144         }
 145     }
 146
 147     updateCapacityBar();
 148 }