临时存放 是

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QItemDelegate>

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class ItemDelegate : public QItemDelegate
{
    Q_OBJECT
public:
    ItemDelegate(QObject* parent = 0) : QItemDelegate(parent) {}
    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
    {
        QStyleOptionViewItem itemOption(option);
        itemOption.palette.setColor(QPalette::HighlightedText, index.data(Qt::ForegroundRole).value<QColor>());
        QColor co = index.data(Qt::BackgroundRole).value<QColor>();
        co.setAlpha(50);
        itemOption.palette.setColor(QPalette::Highlight, co);
        QItemDelegate::paint(painter,itemOption,index);
    }
};

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private:
    Ui::Widget *ui;
};
#endif // WIDGET_H

#include "widget.h"
#include "./ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    ui->tab->setItemDelegateForColumn(1, new ItemDelegate(this));
}

Widget::~Widget()
{
    delete ui;
}

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