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/*
* Copyright 2000-2014 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 java.util.logging.Level;
import java.util.logging.Logger;
import com.vaadin.event.TransferableImpl;
import com.vaadin.event.dd.DragAndDropEvent;
import com.vaadin.server.PaintException;
import com.vaadin.server.PaintTarget;
import com.vaadin.ui.Component;
/**
* Client side criteria that checks if the drag source is one of the given
* components.
*
* @since 6.3
*/
@SuppressWarnings("serial")
public class SourceIs extends ClientSideCriterion {
private Component[] components;
public SourceIs(Component... component) {
components = component;
}
@Override
public void paintContent(PaintTarget target) throws PaintException {
super.paintContent(target);
int paintedComponents = 0;
for (int i = 0; i < components.length; i++) {
Component c = components[i];
if (c.isAttached()) {
target.addAttribute("component" + paintedComponents++, c);
} else {
Logger.getLogger(SourceIs.class.getName())
.log(Level.WARNING,
"SourceIs component {0} at index {1} is not attached to the component hierachy and will thus be ignored",
new Object[] { c.getClass().getName(),
Integer.valueOf(i) });
}
}
target.addAttribute("c", paintedComponents);
}
@Override
public boolean accept(DragAndDropEvent dragEvent) {
if (dragEvent.getTransferable() instanceof TransferableImpl) {
Component sourceComponent = ((TransferableImpl) dragEvent
.getTransferable()).getSourceComponent();
for (Component c : components) {
if (c == sourceComponent) {
return true;
}
}
}
return false;
}
}
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