java - JavaFX center view on cursor position -


i created first javafx app displays images. want zoom image full size on mouse down (centered on cursor position) , refit image on mouse up.

all working fine don't know how center on cursor position. zoom method looks @ moment:

private void zoom100(double cursorx, double cursory){     double centery = imageview.getlayoutbounds().getheight()/2;     double centerx = imageview.getlayoutbounds().getwidth()/2;     imageview.setfitheight(-1); //zooms height 100%     imageview.setfitwidth(-1); //zooms width 100%     imageview.settranslatex(centerx-cursorx); //moves x      imageview.settranslatey(centery-cursory); //moves y }

my idea set offset translate. not sure if translate correct approach. if correct approach how calculate correct values? (centerx-cursorx) wrong!

i uploaded code here: https://github.com/dermoritz/fastimageviewer (it working - see answer)

i didn't test think order wrong. calculate center before set fit size. setting fit size image view change it's preferred size. therefore center point won't match anymore.


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