blame: src/thumbnaildelegate.cpp

#include "thumbnaildelegate.h"

#include <QPainter>

#include <QApplication>

#include <QStyle>

#include <QTextOption>

#include <QFontMetrics>

ThumbnailDelegate::ThumbnailDelegate(QObject *parent)

    : QStyledItemDelegate(parent)

{

}

void ThumbnailDelegate::paint(QPainter *painter,

                              const QStyleOptionViewItem &option,

                              const QModelIndex &index) const

{

    painter->save();

    // Folder items use the default delegate rendering unchanged

    if (index.data(Qt::UserRole).toBool()) {

        painter->restore();

        QStyledItemDelegate::paint(painter, option, index);

        return;

    }

    // Draw selection / hover background

    QStyle *style = option.widget ? option.widget->style() : QApplication::style();

    QStyleOptionViewItem bgOption = option;

    bgOption.showDecorationSelected = true;

    style->drawPrimitive(QStyle::PE_PanelItemViewItem, &bgOption, painter, option.widget);

    const QRect cellRect = option.rect;

    // Fixed icon zone: top IconZoneHeight pixels of the cell

    const QRect iconZone(cellRect.left(), cellRect.top(),

                         cellRect.width(), IconZoneHeight);

    // Fixed text zone: everything below the icon zone

    const QRect textZone(cellRect.left(), cellRect.top() + IconZoneHeight,

                         cellRect.width(), cellRect.height() - IconZoneHeight);

    // --- Draw icon centered within the icon zone ---

    const QVariant decorData = index.data(Qt::DecorationRole);

    QPixmap pixmap;

    if (decorData.userType() == QMetaType::QPixmap) {

        pixmap = qvariant_cast<QPixmap>(decorData);

    } else if (decorData.userType() == QMetaType::QIcon) {

        pixmap = qvariant_cast<QIcon>(decorData).pixmap(option.decorationSize);

    }

    if (!pixmap.isNull()) {

        // Center the pixmap in the icon zone

        const int x = iconZone.left() + (iconZone.width()  - pixmap.width())  / 2;

        const int y = iconZone.top()  + (iconZone.height() - pixmap.height()) / 2;

        painter->drawPixmap(x, y, pixmap);

    }

    // --- Draw text top-aligned within the text zone ---

    const QString text = index.data(Qt::DisplayRole).toString();

    if (!text.isEmpty()) {

        QColor textColor = option.palette.color(

            (option.state & QStyle::State_Selected) ? QPalette::HighlightedText

                                                    : QPalette::Text);

        painter->setPen(textColor);

        painter->setFont(option.font);

        QTextOption textOpt;

        textOpt.setAlignment(Qt::AlignTop | Qt::AlignHCenter);

        textOpt.setWrapMode(QTextOption::WordWrap);

        // Elide text that would overflow the text zone

        const QFontMetrics fm(option.font);

        const QString elidedText = fm.elidedText(

            text, option.textElideMode, textZone.width() * 2);

        painter->drawText(QRectF(textZone), elidedText, textOpt);

    }

    painter->restore();

}

QSize ThumbnailDelegate::sizeHint(const QStyleOptionViewItem &option,

                                  const QModelIndex &index) const

{

    Q_UNUSED(option)

    Q_UNUSED(index)

    // Return the grid size set on the view (148×168)

    return option.rect.size().isValid() ? option.rect.size()

                                        : QStyledItemDelegate::sizeHint(option, index);

}