Source Code : Scroll JTable To Center

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Scroll JTable To Center

      
/*
This file is part of JNesBR.

JNesBR is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

JNesBR is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with JNesBR.  If not, see <http://www.gnu.org/licenses/>.
 */
//package jnesbr.util;

import java.awt.Rectangle;
import javax.swing.JTable;
import javax.swing.JViewport;

/**
 * @author dreampeppers99
 */
public class JTableHelper {

    public static void scrollToCenter(JTable table, int rowIndex, int vColIndex) {
        if (!(table.getParent() instanceof JViewport)) {
            return;
        }
        JViewport viewport = (JViewport) table.getParent();
        Rectangle rect = table.getCellRect(rowIndex, vColIndex, true);
        Rectangle viewRect = viewport.getViewRect();
        rect.setLocation(rect.x - viewRect.x, rect.y - viewRect.y);

        int centerX = (viewRect.width - rect.width) / 2;
        int centerY = (viewRect.height - rect.height) / 2;

        if (rect.x < centerX) {
            centerX = -centerX;
        }
        if (rect.y < centerY) {
            centerY = -centerY;
        }
        rect.translate(centerX, centerY);
        viewport.scrollRectToVisible(rect);
    }
}

   
    
    
    
    
    
  

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