@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
getActivity().getMenuInflater().inflate(R.menu.menu_treeview, menu);
AdapterView.AdapterContextMenuInfo adapterInfo = (AdapterView.AdapterContextMenuInfo) menuInfo;
long id = adapterInfo.id;
TreeNodeInfo<Long> nodeInfo = mTreeStateManager.getNodeInfo(id);
if (nodeInfo.isWithChildren()) {
if (nodeInfo.isExpanded()) {
menu.findItem(R.id.context_menu_expand_item).setVisible(false);
menu.findItem(R.id.context_menu_expand_all).setVisible(false);
} else {
menu.findItem(R.id.context_menu_collapse).setVisible(false);
}
} else {
menu.findItem(R.id.context_menu_expand_item).setVisible(false);
menu.findItem(R.id.context_menu_expand_all).setVisible(false);
menu.findItem(R.id.context_menu_collapse).setVisible(false);
}
// hide delete because deleting is dangerous
menu.findItem(R.id.context_menu_delete).setVisible(false);
super.onCreateContextMenu(menu, v, menuInfo);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo menuInfo =
(AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
long id = menuInfo.id;
if (item.getItemId() == R.id.context_menu_collapse) {
mTreeStateManager.collapseChildren(id);
return true;
} else if (item.getItemId() == R.id.context_menu_expand_all) {
mTreeStateManager.expandEverythingBelow(id);
return true;
} else if (item.getItemId() == R.id.context_menu_expand_item) {
mTreeStateManager.expandDirectChildren(id);
return true;
} else if (item.getItemId() == R.id.context_menu_delete) {
mTreeStateManager.removeNodeRecursively(id);
return true;
} else {
return super.onContextItemSelected(item);
}
}
private void collapseAll() {
if (mTreeStateManager != null) mTreeStateManager.collapseChildren(null);
}
private void expandAll() {
if (mTreeStateManager != null) mTreeStateManager.expandEverythingBelow(null);
}