/** Create a clone of the current CutList to be used as clipboard source */
private void prepareClipboard() {
Selection sel = waveDisplay.getSelection();
int left = sel.getLeft();
int right = sel.getRight();
CutListSource cl = cutList.duplicate();
if (left == 0 && right == cl.getLength()) copySource = cl;
else copySource = new SubSource(cl, left, right - left);
}
