Package com.vaadin.client.ui.dd

Source Code of com.vaadin.client.ui.dd.VTargetInSubtree

/*
* 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.client.ui.dd;

import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.UIDL;
import com.vaadin.client.ui.VTree;
import com.vaadin.client.ui.VTree.TreeNode;
import com.vaadin.shared.ui.dd.AcceptCriterion;
import com.vaadin.ui.Tree;

@AcceptCriterion(Tree.TargetInSubtree.class)
final public class VTargetInSubtree extends VAcceptCriterion {

    @Override
    protected boolean accept(VDragEvent drag, UIDL configuration) {

        VTree tree = (VTree) VDragAndDropManager.get().getCurrentDropHandler()
                .getConnector().getWidget();
        TreeNode treeNode = tree.getNodeByKey((String) drag.getDropDetails()
                .get("itemIdOver"));
        if (treeNode != null) {
            Widget parent2 = treeNode;
            int depth = configuration.getIntAttribute("depth");
            if (depth < 0) {
                depth = Integer.MAX_VALUE;
            }
            final String searchedKey = configuration.getStringAttribute("key");
            for (int i = 0; i <= depth && parent2 instanceof TreeNode; i++) {
                if (searchedKey.equals(((TreeNode) parent2).key)) {
                    return true;
                }
                // panel -> next level node
                parent2 = parent2.getParent().getParent();
            }
        }

        return false;
    }
}
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