在一个QTableWidget单元格中显示不同颜色的字符串

#include <QStyledItemDelegate>
#include <QPainter>

class ColorDelegate : public QStyledItemDelegate
{
public:
    void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
    {
        // 获取单元格的数据和状态
        QString text = index.data().toString();
        bool isSelected = option.state & QStyle::State_Selected;

        // 根据状态设置绘制的颜色
        QColor textColor = isSelected ? Qt::white : Qt::black;
        QColor backgroundColor = isSelected ? Qt::blue : Qt::white;

        // 绘制背景色
        painter->fillRect(option.rect, backgroundColor);

        // 绘制文本
        painter->setPen(textColor);
        painter->drawText(option.rect, Qt::AlignCenter, text);
    }
};

// 创建QTableWidget对象
QTableWidget *tableWidget = new QTableWidget();

// 创建ColorDelegate对象
ColorDelegate *colorDelegate = new ColorDelegate();

// 将ColorDelegate应用到第一列的所有单元格上
tableWidget->setItemDelegateForColumn(0, colorDelegate);