LeftEllipsisRenderer.java

/*
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 * and open the template in the editor.
 */

package ca.canucksoftware.themebuilder;

import java.awt.Component;
import java.awt.FontMetrics;
import java.awt.Insets;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;

/**
 * @author Jason
 */
public class LeftEllipsisRenderer extends DefaultTableCellRenderer {
    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
            boolean hasFocus, int row, int column) {
        super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);

        //Determine the width available to render the text
	int availableWidth = table.getColumnModel().getColumn(column).getWidth()-10;
	availableWidth -= table.getIntercellSpacing().getWidth();
	Insets borderInsets = getBorder().getBorderInsets((Component)this);
	availableWidth -= (borderInsets.left + borderInsets.right);
	String cellText = getText();
	FontMetrics fm = getFontMetrics( getFont() );

	//Not enough space so start rendering from the end of the string
	//until all the space is used up

	if(fm.stringWidth(cellText) > availableWidth) {
            String dots = "...";
            int textWidth = fm.stringWidth( dots );
            int i = cellText.length() - 1;
            for (; i > 0; i--) {
                textWidth += fm.charWidth(cellText.charAt(i));
                if(textWidth > availableWidth) {
                    break;
                }
            }
            setText( dots + cellText.substring(i + 1) );
        }
	return this;
    }
}