src/kitemviews/private/kitemlistselectiontoggle.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "kitemlistselectiontoggle.h"
   8
   9 #include <KIconLoader>
  10
  11 #include <QIcon>
  12 #include <QPainter>
  13
  14 KItemListSelectionToggle::KItemListSelectionToggle(QGraphicsItem* parent) :
  15     QGraphicsWidget(parent),
  16     m_checked(false),
  17     m_hovered(false)
  18 {
  19 }
  20
  21 KItemListSelectionToggle::~KItemListSelectionToggle()
  22 {
  23 }
  24
  25 void KItemListSelectionToggle::setChecked(bool checked)
  26 {
  27     if (m_checked != checked) {
  28         m_checked = checked;
  29         m_pixmap = QPixmap();
  30         update();
  31     }
  32 }
  33
  34 bool KItemListSelectionToggle::isChecked() const
  35 {
  36     return m_checked;
  37 }
  38
  39 void KItemListSelectionToggle::setHovered(bool hovered)
  40 {
  41     if (m_hovered != hovered) {
  42         m_hovered = hovered;
  43         m_pixmap = QPixmap();
  44         update();
  45     }
  46 }
  47
  48 void KItemListSelectionToggle::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
  49 {
  50     Q_UNUSED(option)
  51     Q_UNUSED(widget)
  52
  53     if (m_pixmap.isNull()) {
  54         updatePixmap();
  55     }
  56
  57     const qreal x = (size().width()  - qreal(m_pixmap.width() / m_pixmap.devicePixelRatioF()))  / 2;
  58     const qreal y = (size().height() - qreal(m_pixmap.height() / m_pixmap.devicePixelRatioF())) / 2;
  59     painter->drawPixmap(x, y, m_pixmap);
  60 }
  61
  62 void KItemListSelectionToggle::resizeEvent(QGraphicsSceneResizeEvent* event)
  63 {
  64     QGraphicsWidget::resizeEvent(event);
  65
  66     if (!m_pixmap.isNull()) {
  67         const int pixmapSize = m_pixmap.size().width() / m_pixmap.devicePixelRatioF(); // Pixmap width is always equal pixmap height
  68
  69         if (pixmapSize != iconSize()) {
  70             // If the required icon size is different from the actual pixmap size,
  71             // overwrite the m_pixmap with an empty pixmap and reload the new
  72             // icon on next re-painting.
  73             m_pixmap = QPixmap();
  74         }
  75     }
  76 }
  77
  78 void KItemListSelectionToggle::updatePixmap()
  79 {
  80     const QString icon = m_checked ? QStringLiteral("emblem-remove") : QStringLiteral("emblem-added");
  81     m_pixmap = QIcon::fromTheme(icon).pixmap(iconSize(), m_hovered ? QIcon::Active : QIcon::Disabled);
  82 }
  83
  84 int KItemListSelectionToggle::iconSize() const
  85 {
  86     const int iconSize = qMin(size().width(), size().height());
  87
  88     if (iconSize < KIconLoader::SizeSmallMedium) {
  89         return KIconLoader::SizeSmall;
  90     } else if (iconSize < KIconLoader::SizeMedium) {
  91         return KIconLoader::SizeSmallMedium;
  92     } else if (iconSize < KIconLoader::SizeLarge) {
  93         return KIconLoader::SizeMedium;
  94     } else if (iconSize < KIconLoader::SizeHuge) {
  95         return KIconLoader::SizeLarge;
  96     } else if (iconSize < KIconLoader::SizeEnormous) {
  97         return KIconLoader::SizeHuge;
  98     }
  99
 100     return iconSize;
 101 }
 102