Qt - 无法将图像放在表格中

Question

为什么使用以下代码我只得到一个空表小部件？

QString imgPath = "C:\\path\\to\\image.jpg";
QImage *img = new QImage(imgPath);

QTableWidget     *thumbnailsWidget = new QTableWidget;
QTableWidgetItem *thumbnail = new QTableWidgetItem;
thumbnail->setData(Qt::DecorationRole, QPixmap::fromImage(*img));

thumbnailsWidget->setColumnCount(5);
thumbnailsWidget->setRowCount(3);
thumbnailsWidget->setItem(0, 0, thumbnail);

setCentralWidget(thumbnailsWidget);

如何将图像放入QTableWidgetItem？

谢谢.

PS:
我注意到桌子不是空的.单击不同的QTableWidgetItem元素,空的元素变为蓝色,坐标为[0,0]的元素以不同的方式突出显示:青色,左侧有一个细蓝色条...

Answer 1

你做的几乎都是正确的,但试着控制你img,例如,像这样:

QString imgPath = "C:\\path\\to\\image.jpg";
QImage *img = new QImage();
bool loaded = img->load(imgPath);
if (loaded)
{

    QTableWidget     *thumbnailsWidget = new QTableWidget;
    QTableWidgetItem *thumbnail = new QTableWidgetItem;
    thumbnail->setData(Qt::DecorationRole, QPixmap::fromImage(*img));

    thumbnailsWidget->setColumnCount(5);
    thumbnailsWidget->setRowCount(3);
    thumbnailsWidget->setItem(0, 0, thumbnail);

    w.setCentralWidget(thumbnailsWidget);
} else {
    qDebug()<<"Image "<<imgPath<<" was not opened!";
}

希望,它可以帮到你!祝好运!

Answer 2

好的，我不得不重新缩放图像：

thumbnail->setData(Qt::DecorationRole, QPixmap::fromImage(*img).scaled(100, 100));