ComplexCellRenderer.java Source code

Introduction

Here is the source code for ComplexCellRenderer.java

Source

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.Graphics;

import javax.swing.DefaultListCellRenderer;
import javax.swing.Icon;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListCellRenderer;

class ComplexCellRenderer implements ListCellRenderer {
    protected DefaultListCellRenderer defaultRenderer = new DefaultListCellRenderer();

    public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected,
            boolean cellHasFocus) {
        Font theFont = null;
        Color theForeground = null;
        Icon theIcon = null;
        String theText = null;

        JLabel renderer = (JLabel) defaultRenderer.getListCellRendererComponent(list, value, index, isSelected,
                cellHasFocus);

        if (value instanceof Object[]) {
            Object values[] = (Object[]) value;
            theFont = (Font) values[0];
            theForeground = (Color) values[1];
            theIcon = (Icon) values[2];
            theText = (String) values[3];
        } else {
            theFont = list.getFont();
            theForeground = list.getForeground();
            theText = "";
        }
        if (!isSelected) {
            renderer.setForeground(theForeground);
        }
        if (theIcon != null) {
            renderer.setIcon(theIcon);
        }
        renderer.setText(theText);
        renderer.setFont(theFont);
        return renderer;
    }
}

public class ComplexRenderingSample {
    public static void main(String args[]) {
        Object elements[][] = { { new Font("Helvetica", Font.PLAIN, 20), Color.RED, new MyIcon(), "A" },
                { new Font("TimesRoman", Font.BOLD, 14), Color.BLUE, new MyIcon(), "A" },
                { new Font("Courier", Font.ITALIC, 18), Color.GREEN, new MyIcon(), "A" },
                { new Font("Helvetica", Font.BOLD | Font.ITALIC, 12), Color.GRAY, new MyIcon(), "A" },
                { new Font("TimesRoman", Font.PLAIN, 32), Color.PINK, new MyIcon(), "A" },
                { new Font("Courier", Font.BOLD, 16), Color.YELLOW, new MyIcon(), "A" },
                { new Font("Helvetica", Font.ITALIC, 8), Color.DARK_GRAY, new MyIcon(), "A" } };

        JFrame frame = new JFrame("Complex Renderer");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        ListCellRenderer renderer = new ComplexCellRenderer();
        JComboBox comboBox = new JComboBox(elements);
        comboBox.setRenderer(renderer);
        frame.add(comboBox, BorderLayout.NORTH);

        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}

class MyIcon implements Icon {

    public MyIcon() {
    }

    public int getIconHeight() {
        return 20;
    }

    public int getIconWidth() {
        return 20;
    }

    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.setColor(Color.RED);
        g.drawRect(0, 0, 25, 25);
    }
}