java - How to detect mouse over on drawn image with awt.Graphics.drawImage() when transformed -

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in java swing panel draw image arbitrary transfomation e.g.:

public void paintcomponent(graphics g){     affinetransform transform = affinetransform.gettranslateinstance(x, y);     affinetransform rotateinstance affinetransform.getrotateinstance(rotx, roty);                transform.concatenate(rotateinstance);      g.settransform(transform);         g.drawimage(image, 0, 0 , null); }

what best way detect mouse on over such image?

even better: best way detect mouse on over non-transparent pixels?

construct shape encloses image, , use affinetransform method createtransformedshape() rotate shape along image. shape method contains() allow position testing in component relative coordinates. complete examples seen here , here. 2 approaches inverse coordinate transformation cited here.

image


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