下面的例子展示了如何在上下端有标签的帧中创建画布。

The following example shows how to create a canvas in a frame with labels at the top and bottom.

youdao

下面的例子展示了如何在上下端有标签的帧中创建画布。

The following example shows how to create a canvas in a frame with labels at the top and bottom.

youdao