final/src/DialogueMenu.java

import java.awt.*;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

public class DialogueMenu extends TextBox implements Serializable {
    public static final int PORTRAIT_WIDTH = 200;
    public static final int PADDING = 20;
    public static final int TOP_PADDING = 10;
    public static final double LINE_SPACING = 1.5;
    public static final int FREQUENCY = 2;
    public BufferedImageWrapper PORTRAIT;
    public int currentFrame = 0;
    public int frameCounter = 0;

    public DialogueMenu(int y, int yHeight, Font font, BufferedImageWrapper portrait) {
        super(y, GamePanel.GAME_WIDTH - PORTRAIT_WIDTH - PADDING*3, yHeight, 0, font, null, null);
        newX = PORTRAIT_WIDTH + PADDING*2;
        PORTRAIT = portrait;
    }

    public void drawCenteredTextBox(Graphics g, String text, Color backgroundColor, Color textColor) {
        text = text.substring(0, currentFrame);
        if (backgroundColor != null) {
            g.setColor(textColor);
            // TODO: make drawn line widths consistent
            g.drawImage(PORTRAIT.image, newX - PORTRAIT_WIDTH - PADDING, newY, PORTRAIT_WIDTH, yHeight, null);
            ((Graphics2D)g).setStroke(new BasicStroke(4f));
            g.drawRect(newX, newY, xWidth, yHeight - 4);
            g.setColor(backgroundColor);
            g.fillRect(newX, newY, xWidth, yHeight - 4);
        }
        g.setColor(textColor);
        drawCenteredString(g, newY, newX, text);
    }

    public static void drawCenteredString(Graphics g, int y, int x, String text) {
        // split text by spaces
        String[] newText = text.split(" ");
        ArrayList<String> lines = new ArrayList<String>();
        lines.add("");
        // get font size
        FontMetrics metrics = g.getFontMetrics();
        int currentLineWidth = 0, lastLineIndex = 0;
        for (String s: newText) {
            currentLineWidth += metrics.stringWidth(s + " ");
            if (currentLineWidth - metrics.stringWidth(" ") < (GamePanel.GAME_WIDTH - PORTRAIT_WIDTH - PADDING*5)) {
                lines.set(lastLineIndex, lines.get(lastLineIndex) + s + " ");
            } else {
                currentLineWidth = metrics.stringWidth(s);
                lines.add(s + " ");
                lastLineIndex ++;
            }
        }
        y += TOP_PADDING;
        // center y (half is above y value, half is below y value)
        for (String s: lines) {
            y += (metrics.getAscent() - metrics.getDescent()) * LINE_SPACING;
            // draw string
            g.drawString(s + "\n", x + PADDING, y);
        }
    }

    public boolean draw(Graphics g, String text, Color backgroundColor, Color textColor) {
        if (frameCounter >= FREQUENCY) {
            frameCounter -= FREQUENCY;
            currentFrame += 1;
        }
        g.setFont(font);
        drawCenteredTextBox(g, text, backgroundColor, textColor);
        frameCounter++;
        if (currentFrame >= text.length()) {
            currentFrame = 0;
            return true;
        } else {
            return false;
        }
    }
}