stardelegate.cpp

来自「奇趣公司比较新的qt/emd版本」· C++ 代码 · 共 114 行

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#include <QtGui>

#include "stardelegate.h"
#include "stareditor.h"
#include "starrating.h"

void StarDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                         const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarRating starRating = qVariantValue<StarRating>(index.data());

        if (option.state & QStyle::State_Selected)
            painter->fillRect(option.rect, option.palette.highlight());

        starRating.paint(painter, option.rect, option.palette,
                         StarRating::ReadOnly);
    } else {
        QItemDelegate::paint(painter, option, index);
    }
}

QSize StarDelegate::sizeHint(const QStyleOptionViewItem &option,
                             const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarRating starRating = qVariantValue<StarRating>(index.data());
        return starRating.sizeHint();
    } else {
        return QItemDelegate::sizeHint(option, index);
    }
}

QWidget *StarDelegate::createEditor(QWidget *parent,
                                    const QStyleOptionViewItem &option,
                                    const QModelIndex &index) const

{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarEditor *editor = new StarEditor(parent);
        connect(editor, SIGNAL(editingFinished()),
                this, SLOT(commitAndCloseEditor()));
        return editor;
    } else {
        return QItemDelegate::createEditor(parent, option, index);
    }
}

void StarDelegate::setEditorData(QWidget *editor,
                                 const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarRating starRating = qVariantValue<StarRating>(index.data());
        StarEditor *starEditor = qobject_cast<StarEditor *>(editor);
        starEditor->setStarRating(starRating);
    } else {
        QItemDelegate::setEditorData(editor, index);
    }
}

void StarDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
                                const QModelIndex &index) const
{
    if (qVariantCanConvert<StarRating>(index.data())) {
        StarEditor *starEditor = qobject_cast<StarEditor *>(editor);
        model->setData(index, qVariantFromValue(starEditor->starRating()));
    } else {
        QItemDelegate::setModelData(editor, model, index);
    }
}

void StarDelegate::commitAndCloseEditor()
{
    StarEditor *editor = qobject_cast<StarEditor *>(sender());
    emit commitData(editor);
    emit closeEditor(editor);
}