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Vaadin is a web application framework for Rich Internet Applications (RIA).
Vaadin enables easy development and maintenance of fast and secure rich web
applications with a stunning look and feel and a wide browser support.
It features a server-side architecture with the majority of the logic running
on the server. Ajax technology is used at the browser-side to ensure a rich
and interactive user experience.
/*
* Copyright 2011 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
/**
*
*/
package com.vaadin.event.dd.acceptcriteria;
import com.vaadin.event.dd.DragAndDropEvent;
import com.vaadin.terminal.PaintException;
import com.vaadin.terminal.PaintTarget;
import com.vaadin.terminal.gwt.client.ui.dd.VNot;
/**
* Criterion that wraps another criterion and inverts its return value.
*
* @since 6.3
*
*/
@ClientCriterion(VNot.class)
public class Not extends ClientSideCriterion {
private static final long serialVersionUID = 1131422338558613244L;
private AcceptCriterion acceptCriterion;
public Not(ClientSideCriterion acceptCriterion) {
this.acceptCriterion = acceptCriterion;
}
@Override
public void paintContent(PaintTarget target) throws PaintException {
super.paintContent(target);
acceptCriterion.paint(target);
}
public boolean accept(DragAndDropEvent dragEvent) {
return !acceptCriterion.accept(dragEvent);
}
}