qt4 - 如何将数据插入QTableWidget？

我有这个应用程序，用户可以在QGraphicsView中绘制一些自定义QGraphicsItems，我希望有关这些项目的一些数据也会显示在QTableWidget中。

自定义QGraphicsItem的代码：头文件：


    class Clothoid : public QGraphicsItem
    {
    public:
        Clothoid(QPoint startPoint, QPoint endPoint);
        virtual ~Clothoid();

        QPoint sPoint;
        QPoint ePoint;
        CFloat startCurvature;
        CFloat endCurvature;
        CFloat clothoidLength;
        CFloat tangentAngle;
    ...
    }

cpp文件：


    Clothoid::Clothoid(QPoint startPoint, QPoint endPoint)
    {
        sPoint = startPoint;
        ePoint = endPoint;
        startCurvature = 0.0;
        endCurvature = 0.0;
        clothoidLength = sqrt(pow(endPoint.x() - startPoint.x(),2) +
                              pow(endPoint.y() - startPoint.y(),2));
    }

图形视图的代码：


    renderArea::renderArea(QWidget *parent):
            QGraphicsView(parent)
    {
        scene = new QGraphicsScene(this);
        scene->setItemIndexMethod(QGraphicsScene::NoIndex);
        scene->setSceneRect(0, 0, 850, 480);
        setScene(scene);
        setCacheMode(CacheBackground);
        setViewportUpdateMode(BoundingRectViewportUpdate);
        setRenderHint(QPainter::Antialiasing);
        setTransformationAnchor(AnchorUnderMouse);
        scale(qreal(1.0), qreal(1.0));
        setMinimumSize(400, 400);
    }

    void renderArea::mousePressEvent(QMouseEvent *event)
    {
        QPoint p = event->pos();

        updateList(p);
    }

    void renderArea::updateList(const QPoint &p)
    {
        Point point;
        point.point = p;
        point.isSelected = false;
        list.append(point);
        if (list.size() > 1)
            updateClothoid(list[list.size()-2].point, list[list.size()-1].point);
    }

    void renderArea::updateClothoid(const QPoint &p1, const QPoint &p2)
    {
        Clothoid *temp = new Clothoid(p1, p2);

        clothoids.append(temp);

        scene->addItem(temp);

        emit clothoidAdded(&clothoids);
    }

其中回旋加工被定义为：


QList clothoids;

我将信号与表格小部件的另一个特殊类中的插槽连接：


    void TableViewList::onClothoidAdded(QList *clothoids)
    {
        setRowCount(clothoids->size());

        for (int i = 0; i size(); i++){
            setItem(i+1, 0, new QTableWidgetItem(clothoids->at(i)->startCurvature));
            setItem(i+1, 1, new QTableWidgetItem(clothoids->at(i)->endCurvature));
            setItem(i+1, 2, new QTableWidgetItem(clothoids->at(i)->clothoidLength));
            setItem(i+1, 3, new QTableWidgetItem(clothoids->at(i)->sPoint.x() + ", " +
                                               clothoids->at(i)->sPoint.y()));
            setItem(i+1, 4, new QTableWidgetItem(clothoids->at(i)->ePoint.x() + ", " +
                                               clothoids->at(i)->ePoint.y()));
        }

    }

问题是数据未插入表中。我检查了调试，我看到数组保存了想要的数据。我怎样才能正确访问它？有什么想法吗？

尝试使用QTableView和QStandardItemModel时遇到此问题：模型中的数据未插入表中：


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

        model.setColumnCount(3);
        ui->clothoidTable->setModel(&model);

        SpinBoxDelegate delegate;
        ui->clothoidTable->setItemDelegate(&delegate);


        connect (ui->saveButton, SIGNAL(clicked()), this, SLOT(createClothoid()));
    }


    void renderingWidget::createClothoid()
    {
        model.setRowCount(model.rowCount()+1);

        QModelIndex index = model.index(model.rowCount(), 1, QModelIndex());
        model.setData(index, QVariant(ui->lengthSpinBox->value()));
        index = model.index(model.rowCount(), 2, QModelIndex());
        model.setData(index, QVariant(ui->sCurvSpinBox->value()));
        index = model.index(model.rowCount(), 3, QModelIndex());
        model.setData(index, QVariant(ui->eCurvSpinBox->value()));

        ui->clothoidTable->setModel(&model);
    }

我希望能够在一些文本框/旋转框中插入数据，然后在按钮上单击应该在表格中添加的数据。但只更新行数而不是更新的数据。在为模型设置数据时，我是否做错了什么？

如何将数据插入QTableWidget？

1 个答案: