PowerModeler/source/tableWidgetHoverDelegate.cpp

#include "tableWidgetHoverDelegate.h"
#include <QPainter>

QTableWidgetHoverDelegate::QTableWidgetHoverDelegate(QTableWidget *parent)
    : QStyledItemDelegate{parent}
{
    m_tableWiget = parent;
}

QTableWidgetHoverDelegate::~QTableWidgetHoverDelegate()
{}

void QTableWidgetHoverDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    if(option.state.testFlag(QStyle::State_MouseOver) && m_tableWiget)
    {
        QTableWidgetItem* hoveredItem = m_tableWiget->item(index.row(), index.column());
        if(hoveredItem)
        {
            int row = index.row();
            for(int column = 0; column < m_tableWiget->columnCount(); column++)
            {
                QTableWidgetItem* item = m_tableWiget->item(row, column);
                if(!item)
                    continue;

                QModelIndex index = m_tableWiget->model()->index(row, column);
                QStyleOptionViewItem itemOption = option;
                itemOption.rect = m_tableWiget->visualItemRect(item);
                QStyledItemDelegate::paint(painter, itemOption, index);
            }
        }
    }
    else
    {
        /*int row = index.row();
        int col = index.column();
        QTableWidgetItem* item = m_tableWiget->item(row, col);
        QRect rect = m_tableWiget->visualItemRect(item);
        qDebug() << row << ", " << col << " optionRect:" << option.rect  << " visualItemRect:" << rect;
        painter->save();
        painter->setPen(Qt::red);
        painter->drawLine(rect.x(), rect.y() + rect.height()*0.5, rect.x() + rect.width(), rect.y() + rect.height()*0.5); //painter属于view，所以要以view的坐标系为标准
        painter->restore();*/
        QStyledItemDelegate::paint(painter, option, index);
    }
}