Qt - 无法将图像放入表格中 [英] Qt - Cannot put an image in a table

问题描述

为什么使用以下代码我只得到一个空表小部件？

Why with the following code I just get an empty table widget?

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？

How can I put an image into a QTableWidgetItem?

谢谢。

PS：

我注意到表格并不是空的。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...

P.S.:
I noticed that the table is not really empty. Clicking on the different QTableWidgetItem elements, the empty ones become blue, the one with coordinates [0,0] is highlighted differently: cyan with a thin blue bar on the left...

推荐答案

好的，我不得不重新缩放图像：

OK, I had to rescale the image:

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

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