+ // convert mousex and mousey to alignment units as well as
+ // translating to top left corner of viewport - this is an absolute position
+ int xAsRes = getLeftXFromCentreX(mousex, hiddenCols);
+ int yAsSeq = getTopYFromCentreY(mousey, hiddenSeqs);
+
+ // convert to visible positions
+ int visXAsRes = hiddenCols.absoluteToVisibleColumn(xAsRes);
+ yAsSeq = hiddenSeqs.adjustForHiddenSeqs(
+ hiddenSeqs.findIndexWithoutHiddenSeqs(yAsSeq));
+ yAsSeq = Math.max(yAsSeq, 0); // -1 if before first visible sequence
+ int visYAsSeq = hiddenSeqs.findIndexWithoutHiddenSeqs(yAsSeq);
+ visYAsSeq = Math.max(visYAsSeq, 0); // -1 if before first visible sequence
+
+ // update viewport accordingly
+ updateViewportFromTopLeft(visXAsRes, visYAsSeq, hiddenSeqs, hiddenCols);
+ }
+
+ @Override
+ public void adjustViewportFromMouse(int mousex, int mousey,
+ HiddenSequences hiddenSeqs, HiddenColumns hiddenCols)
+ {