Refresh Your Java - Before Java Interview
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You need to implment "TreeExpansionListener" and register your Jtree.
TreeExpansionListener implementation:
public class
YourOwnTreeExpansionListener implements
TreeExpansionListener{
public void treeCollapsed(TreeExpansionEvent
te){
for(int i=0;
i<expandedNodes.size(); i++){
if(equalPath((TreePath)expandedNodes.get(i),te.getPath())){
expandedNodes.remove(i);
}
}
}
public void treeExpanded(TreeExpansionEvent
te){
if(te.getPath().getPathCount()>1){
boolean has=false;
for(int i=0; i<expandedNodes.size(); i++){
if(equalPath((TreePath)expandedNodes.get(i),te.getPath())){
has=true;
break;
}
}
if(!has){
expandedNodes.add(te.getPath());
}
}
}
}
JTree
:
public class YourOwnTree extends
JTree {
public
YourOwnTree(YourController rc) {
this.rc = rc;
this.setEditSets(rc.getEditSets());
this.addTreeExpansionListener(yourOwnTreeExpansionListener);
}
}
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