BeforeCollapseNodeEvent.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.ide.ui.smartTree.event;

import com.google.gwt.event.shared.EventHandler;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerRegistration;

import org.eclipse.che.ide.api.data.tree.Node;
import org.eclipse.che.ide.ui.smartTree.event.BeforeCollapseNodeEvent.BeforeCollapseNodeHandler;

/**
 * Event fires before node will be collapsed.
 *
 * @author Vlad Zhukovskiy
 */
public class BeforeCollapseNodeEvent extends GwtEvent<BeforeCollapseNodeHandler> implements CancellableEvent {

    public interface HasBeforeCollapseItemHandlers {
        HandlerRegistration addBeforeCollapseHandler(BeforeCollapseNodeHandler handler);
    }

    public interface BeforeCollapseNodeHandler extends EventHandler {
        void onBeforeCollapse(BeforeCollapseNodeEvent event);
    }

    private static Type<BeforeCollapseNodeHandler> TYPE;

    public static Type<BeforeCollapseNodeHandler> getType() {
        if (TYPE == null) {
            TYPE = new Type<>();
        }
        return TYPE;
    }

    private boolean cancelled;
    private Node    node;

    public BeforeCollapseNodeEvent(Node node) {
        this.node = node;
    }

    public Node getNode() {
        return node;
    }

    @Override
    public Type<BeforeCollapseNodeHandler> getAssociatedType() {
        return TYPE;
    }

    /** {@inheritDoc} */
    @Override
    public boolean isCancelled() {
        return cancelled;
    }

    /** {@inheritDoc} */
    @Override
    public void setCancelled(boolean cancelled) {
        this.cancelled = cancelled;
    }

    /** {@inheritDoc} */
    @Override
    protected void dispatch(BeforeCollapseNodeHandler handler) {
        handler.onBeforeCollapse(this);
    }

}