Java JList loc2IndexFileList(JList list, Point point)

Description

loc Index File List

License

Apache License

Parameter

Parameter	Description
list	a parameter
point	a parameter

Declaration

public static int loc2IndexFileList(JList list, Point point) 

Method Source Code

//package com.java2s;
/*//from   w ww .  j  a va2 s  .c  om
 *
 * Copyright (C) 2005-2008 Yves Zoundi
 *
 * 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.
 * under the License.
 */

import java.awt.Component;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Rectangle;
import javax.swing.JList;

import javax.swing.ListCellRenderer;
import javax.swing.ListModel;

public class Main {
    /**
     *
     * @param list
     * @param point
     * @return
     */
    public static int loc2IndexFileList(JList list, Point point) {
        int index = list.locationToIndex(point);

        if (index != -1) {
            Object bySize = list.getClientProperty("List.isFileList");

            if (bySize instanceof Boolean && ((Boolean) bySize).booleanValue()
                    && !pointIsInActualBounds(list, index, point)) {
                index = -1;
            }
        }

        return index;
    }

    /**
     *
     * @param list
     * @param index
     * @param point
     * @return
     */
    public static boolean pointIsInActualBounds(JList list, int index, Point point) {
        ListCellRenderer renderer = list.getCellRenderer();
        ListModel dataModel = list.getModel();
        Object value = dataModel.getElementAt(index);
        Component item = renderer.getListCellRendererComponent(list, value, index, false, false);
        Dimension itemSize = item.getPreferredSize();
        Rectangle cellBounds = list.getCellBounds(index, index);

        if (!item.getComponentOrientation().isLeftToRight()) {
            cellBounds.x += (cellBounds.width - itemSize.width);
        }

        cellBounds.width = itemSize.width;

        return cellBounds.contains(point);
    }
}

Related

1. indexList(JList list, Object object)
2. indexOf(JList jList, Object obj)
3. isDoubleClick(MouseEvent evt, JList lst, JButton btn)
4. isIndexFullyVisible(JList list, int index)
5. JListClearData(javax.swing.JList list)
6. navigateThroughList(javax.swing.JList list, int keyCode)
7. pickFirstIfNone(JList list)
8. pointIsInActualBounds(JList list, int index, Point point)
9. pointIsInActualBounds(JList list, int index, Point point)