source: lost-perception/gamegui/Button.java

package gamegui;

import java.awt.FontMetrics;
import java.awt.Image;
import java.awt.image.ImageObserver;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.Font;
import java.awt.Color;

public class Button extends Member
{
    private String text;
    public Color color;
    private Font font;
    private BufferedImage img;
    private Align alignment;
    boolean border;
    
    public Button(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final String newText, final Font newFont) {
        super(newName, newX, newY, newWidth, newHeight);
        this.text = newText;
        this.color = Color.green;
        this.font = newFont;
        this.img = null;
        this.alignment = Align.Left;
        this.border = true;
    }
    
    public Button(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final String newText, final Font newFont, final Color color) {
        super(newName, newX, newY, newWidth, newHeight);
        this.text = newText;
        this.color = color;
        this.font = newFont;
        this.img = null;
        this.alignment = Align.Left;
        this.border = true;
    }
    
    public Button(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final String newText, final Font newFont, final Color color, final boolean border) {
        super(newName, newX, newY, newWidth, newHeight);
        this.text = newText;
        this.color = color;
        this.font = newFont;
        this.img = null;
        this.alignment = Align.Left;
        this.border = border;
    }
    
    public Button(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final String newText, final Font newFont, final Align alignment) {
        super(newName, newX, newY, newWidth, newHeight);
        this.text = newText;
        this.color = Color.green;
        this.font = newFont;
        this.img = null;
        this.alignment = alignment;
        this.border = true;
    }
    
    public Button(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final BufferedImage img) {
        super(newName, newX, newY, newWidth, newHeight);
        this.text = "";
        this.font = null;
        this.img = img;
        this.alignment = Align.Left;
        this.border = false;
    }
    
    @Override
    public void draw(final Graphics g) {
        if (this.img == null) {
            final FontMetrics metrics = g.getFontMetrics(this.font);
            if (this.border) {
                g.setColor(Color.red);
                g.drawRect(this.getX(), this.getY(), this.getWidth(), this.getHeight());
            }
            g.setColor(this.color);
            g.setFont(this.font);
            switch (this.alignment) {
                case Center: {
                    g.drawString(this.text, this.getX() + (this.getWidth() - metrics.stringWidth(this.text)) / 2, this.getY() + (this.getHeight() + metrics.getHeight()) / 2 - 2);
                    break;
                }
                case Right: {
                    g.drawString(this.text, this.getX() + this.getWidth() - metrics.stringWidth(this.text), this.getY() + (this.getHeight() + metrics.getHeight()) / 2 - 2);
                    break;
                }
                case Left: {
                    g.drawString(this.text, this.getX(), this.getY() + (this.getHeight() + metrics.getHeight()) / 2 - 2);
                    break;
                }
            }
        }
        else {
            g.drawImage(this.img, this.getX() + (this.getWidth() - this.img.getWidth(null)) / 2, this.getY() + (this.getHeight() - this.img.getHeight(null)) / 2 - 2, null);
        }
    }
}