source: galactic-heroes/gamegui/Textbox.java

package gamegui;

import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.FontMetrics;
import java.awt.image.ImageObserver;
import java.awt.Image;
import java.awt.Color;
import java.awt.GraphicsEnvironment;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.Font;

public class Textbox extends Member {
    private String label;
    private String text;
    private Font font;
    private int textStart;
    private boolean selected;
    private int cursorState;
    private int blinkInterval;
    private long lastCursorChange;
    private boolean password;
    
    public Textbox(final String newName, final int newX, final int newY, final int newWidth, final int newHeight, final String newLabel, final Font newFont, final boolean isPass) {
        super(newName, newX, newY, newWidth, newHeight);
        this.label = new String(newLabel);
        this.text = new String();
        this.font = newFont;
        this.textStart = 0;
        this.selected = false;
        this.cursorState = 0;
        this.blinkInterval = 500;
        this.password = isPass;
    }
    
    public void handleEvent(final KeyEvent e) {
        if (32 <= e.getKeyCode() && e.getKeyCode() <= 127) {
            if (e.getKeyCode() == 127) {
                if (this.text.length() > 0) {
                    this.text = this.text.substring(0, this.text.length() - 1);
                }
            } else {
                this.text = String.valueOf(this.text) + Character.toString(e.getKeyChar());
            }
        } else if (e.getKeyCode() == 8 && this.text.length() > 0) {
            this.text = this.text.substring(0, this.text.length() - 1);
        }
    }
    
    public void draw(final Graphics g) {
        String drawnString = new String();
        final FontMetrics metrics = g.getFontMetrics(this.font);
        final GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        final GraphicsDevice device = env.getDefaultScreenDevice();
        final GraphicsConfiguration gc = device.getDefaultConfiguration();
        final BufferedImage source = gc.createCompatibleImage(this.getWidth(), this.getHeight());
        final Graphics2D srcGraphics = source.createGraphics();
        if (this.selected && System.currentTimeMillis() - this.lastCursorChange > this.blinkInterval) {
            if (this.cursorState == 0) {
                this.cursorState = 1;
            } else {
                this.cursorState = 0;
            }
            this.lastCursorChange = System.currentTimeMillis();
        }
        if (this.password) {
            for (int x = 0; x < this.text.length(); ++x) {
                drawnString = String.valueOf(drawnString) + "*";
            }
        } else {
            drawnString = this.text;
        }
        if (metrics.stringWidth(drawnString) + 9 > this.getWidth()) {
            this.textStart = metrics.stringWidth(drawnString) + 9 - this.getWidth();
        }
        else {
            this.textStart = 0;
        }
        g.setColor(Color.green);
        g.setFont(this.font);
        srcGraphics.setColor(Color.green);
        srcGraphics.setFont(this.font);
        srcGraphics.drawString(drawnString, -this.textStart + 3, (this.getHeight() + metrics.getHeight()) / 2 - 2);
        g.drawImage(source, this.getX(), this.getY(), null);
        g.drawString(this.label, this.getX() - metrics.stringWidth(this.label) - 10, this.getY() + (this.getHeight() + metrics.getHeight()) / 2 - 2);
        if (this.selected && this.cursorState == 1) {
            g.drawLine(this.getX() + metrics.stringWidth(drawnString) - this.textStart + 5, this.getY() + 5, this.getX() + metrics.stringWidth(drawnString) - this.textStart + 5, this.getY() + this.getHeight() - 5);
        }
        g.setColor(Color.red);
        g.drawRect(this.getX(), this.getY(), this.getWidth(), this.getHeight());
    }
    
    public boolean isClicked(final int xCoord, final int yCoord) {
        return xCoord >= this.getX() && this.getX() + this.getWidth() >= xCoord && yCoord >= this.getY() && this.getY() + this.getHeight() >= yCoord;
    }
    
    public void clear() {
        this.text = "";
        this.textStart = 0;
        this.selected = false;
    }
    
    public String getText() {
        return this.text;
    }
    
    public void setText(final String newText) {
        this.text = new String(newText);
    }
    
    public void setSelected(final boolean isSelected) {
        this.selected = isSelected;
    }
}