javax.swing.ListSelectionModel#setAnchorSelectionIndex ( )源码实例Demo

/**
 * Set the lead and anchor without affecting selection.
 */
public static void setLeadAnchorWithoutSelection(ListSelectionModel model,
                                                 int lead, int anchor) {
    if (anchor == -1) {
        anchor = lead;
    }
    if (lead == -1) {
        model.setAnchorSelectionIndex(-1);
        model.setLeadSelectionIndex(-1);
    } else {
        if (model.isSelectedIndex(lead)) {
            model.addSelectionInterval(lead, lead);
        } else {
            model.removeSelectionInterval(lead, lead);
        }
        model.setAnchorSelectionIndex(anchor);
    }
}
 

/**
    * Invokes <code>getNextIndex</code> to determine the next index
    * to select. If the index is valid (not -1 and < size of the model),
    * this will either: move the selection to the new index if
    * the selectionType == CHANGE_SELECTION, move the lead to the
    * new index if selectionType == CHANGE_LEAD, otherwise the
    * selection is extend from the anchor to the new index and the
    * lead is set to the new index.
    */
   public void actionPerformed(ActionEvent e) {
     int index = getNextIndex();
     if (index >= 0 && index < list.getModel().getSize()) {
ListSelectionModel lsm = list.getSelectionModel();

if (selectionType == EXTEND_SELECTION) {
  int anchor = lsm.getAnchorSelectionIndex();
  if (anchor == -1) {
    anchor = index;
  }
  list.setSelectionInterval(anchor, index);
  lsm.setAnchorSelectionIndex(anchor);
  lsm.setLeadSelectionIndex(index);
}
else if (selectionType == CHANGE_SELECTION) {
  list.setSelectedIndex(index);
}
else {
  lsm.setLeadSelectionIndex(index);
}
ensureIndexIsVisible(index);
     }
   }
 

public void setTo(ListSelectionModel sm) {
    sm.clearSelection();
    sm.setSelectionMode(selectionMode);
    for (int[] itv : intervals) {
        sm.addSelectionInterval(itv[0], itv[1]);
    }
    sm.setAnchorSelectionIndex(anchor);
    sm.setLeadSelectionIndex(lead);
}