Example usage for com.vaadin.ui TreeGrid addExpandListener

Introduction

In this page you can find the example usage for com.vaadin.ui TreeGrid addExpandListener.

Prototype

public Registration addExpandListener(ExpandListener<T> listener) 

Source Link

Document

Adds an ExpandListener to this TreeGrid.

Usage

From source file:org.jpos.qi.minigl.AccountsView.java

License:Open Source License

@Override
public Grid createGrid() {
    TreeGrid<Account> tree = new TreeGrid();
    tree.setSizeFull();//  ww  w.  j  a  va2s .com
    tree.setSelectionMode(Grid.SelectionMode.SINGLE);
    tree.addItemClickListener(event -> {
        //do nothing if it's root
        if (event.getItem().getRoot().getId() != event.getItem().getId()) {
            String url = getGeneralRoute() + "/" + getHelper().getItemId(event.getItem());
            getApp().getNavigator().navigateTo(url);
        }
    });
    tree.setItemCollapseAllowedProvider(account -> account.getParent() != null);
    tree.addExpandListener(listener -> {
        if (listener.getExpandedItem().getParent() != null)
            expandedItems.add(listener.getExpandedItem());
    });
    tree.addCollapseListener(listener -> expandedItems.remove(listener.getCollapsedItem()));
    return tree;
}

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