60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
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#include "IconColumnDelegate.h"
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#include <QPainter>
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IconColumnDelegate::IconColumnDelegate(QWidget *parent)
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: QStyledItemDelegate(parent)
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{
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}
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IconColumnDelegate::~IconColumnDelegate()
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{
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clearCache();
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}
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void IconColumnDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
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const QModelIndex &index) const
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{
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if (index.data().canConvert<QString>()) {
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QString icon_name = qvariant_cast<QString>(index.data());
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QIcon* icon = IconColumnDelegate::getIcon(icon_name);
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if (icon) {
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if (option.state & QStyle::State_Selected)
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painter->fillRect(option.rect, option.palette.highlight());
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icon->paint(painter, option.rect);
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}
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else
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QStyledItemDelegate::paint(painter, option, index);
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} else {
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QStyledItemDelegate::paint(painter, option, index);
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}
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}
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QSize IconColumnDelegate::sizeHint(const QStyleOptionViewItem &option,
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const QModelIndex &index) const
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{
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return QSize(16, 16);
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}
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void IconColumnDelegate::clearCache()
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{
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for (auto &e : m_Icons)
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delete e.
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second;
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m_Icons.clear();
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}
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QIcon* IconColumnDelegate::getIcon(const QString &name) const
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{
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auto fr = m_Icons.find(name);
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if (fr == m_Icons.end()) {
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// load and insert icon
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QIcon *icon = new QIcon(name);
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fr = m_Icons.emplace(name, icon).first;
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}
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return fr->second;
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}
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