I have a JPanel with an vector image that the user can zoom and pan on. Overlaying this image is a (transparent) JComponent, which I allow the user to annotate the underlying image. This works great at full scale, but If I zoom in, using AffineTransform, the overlaying coordinates are affected also. So, If a user draws a box on the image the box is scaled also.
Any suggestions on how to decouple this behaviour? So that the JComponent is not affected by the JPanel's AffineTransform?
Typically, you need both a forward and inverse transform to translate between the two co-ordinate systems. In this example, the scaling equations are explicit; in this alternate approach, a second AffineTransform is used.
来源：https://stackoverflow.com/questions/4292174/jcomponent-jpanel-zoom-pan-and-coordinates-question