pixeldelegate.cpp Example File

itemviews/pixelator/pixeldelegate.cpp
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#include "pixeldelegate.h" #include <QPainter> PixelDelegate::PixelDelegate(QObject *parent) : QAbstractItemDelegate(parent) { pixelSize = 12; } void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const { if (option.state & QStyle::State_Selected) painter->fillRect(option.rect, option.palette.highlight()); int size = qMin(option.rect.width(), option.rect.height()); int brightness = index.model()->data(index, Qt::DisplayRole).toInt(); double radius = (size / 2.0) - (brightness / 255.0 * size / 2.0); if (radius == 0.0) return; painter->save(); painter->setRenderHint(QPainter::Antialiasing, true); painter->setPen(Qt::NoPen); if (option.state & QStyle::State_Selected) painter->setBrush(option.palette.highlightedText()); else painter->setBrush(option.palette.text()); painter->drawEllipse(QRectF(option.rect.x() + option.rect.width() / 2 - radius, option.rect.y() + option.rect.height() / 2 - radius, 2 * radius, 2 * radius)); painter->restore(); } QSize PixelDelegate::sizeHint(const QStyleOptionViewItem & /* option */, const QModelIndex & /* index */) const { return QSize(pixelSize, pixelSize); } void PixelDelegate::setPixelSize(int size) { pixelSize = size; }