mytree.java

GPRS数据通讯软件源码

/*
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 */

package documenteditor;

import java.awt.Dimension;
import javax.swing.JTree;
import javax.swing.JViewport;

/**
 *
 * @author Administrator
 */
public class MyTree extends JTree{
    
    @Override
    public Dimension getPreferredSize() {
        if (isPreferredSizeSet()) {
            return super.getPreferredSize();
        }
        Dimension size = null;
        try {
            if (ui != null) {
                size = ui.getPreferredSize(this);
            }
        } catch (Exception e) {
            size = null;
        }
        try {
            return (size != null) ? size : super.getPreferredSize();
        } catch (Exception e) {
            return null;
        }
    }
    
    @Override
    public boolean getScrollableTracksViewportWidth() {
	try {
            if (getParent() instanceof JViewport) {
                return (((JViewport) getParent()).getWidth() > getPreferredSize().width);
            }
        } catch (Exception e) {
        }
	return false;
    }

}