Panel.java

package com.lucasdnd.ags.ui;

import org.newdawn.slick.Color;
import org.newdawn.slick.Font;
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.geom.Rectangle;
import org.newdawn.slick.state.StateBasedGame;

import com.lucasdnd.ags.map.OffsetUtil;
import com.lucasdnd.ags.ui.components.Clickable;

/**
 * A Window.
 * @author tulio
 *
 */
public abstract class Panel extends UIComponent implements Clickable {
	
	protected String title;				// The Title of the window
	protected Rectangle titleBar;		// The Title Bar
	protected Color backgroundColor;
	protected Color titleBackgroundColor;
	
	protected Rectangle window;			// The Window Rectangle
	protected Rectangle dropShadow;		// The shadow
	
	public static final float LINE_Y_OFFSET = 27f;	// The distance from the top of the Panel (yPos) to the point where the titleBarLine is rendered
	
	/**
	 * Basic Constructor
	 * @param title
	 * @param xPos
	 * @param yPos
	 * @param width
	 * @param height
	 * @throws SlickException
	 */
	public Panel(String title, float xPos, float yPos, float width, float height) throws SlickException {
		
		// Basic Attributes
		this.title = title;
		this.xPos = xPos;
		this.yPos = yPos;
		this.width = width;
		this.height = height;
		
		// As default, it is not visible when it's first created
		this.visible = false;
		
		// Creates the Rectangle forms
		window = new Rectangle(xPos, yPos, width, height);
		dropShadow = new Rectangle(xPos + 4f, yPos + 4f, width, height);
		titleBar = new Rectangle(xPos, yPos, width, LINE_Y_OFFSET + 6f);
		backgroundColor = new Color(255f, 255f, 255f, 1f);
	}
	
	protected Panel(String title, float xPos, float yPos, float width, float height, float titleBarHeight) throws SlickException {
		
		// Basic Attributes
		this.title = title;
		this.xPos = xPos;
		this.yPos = yPos;
		this.width = width;
		this.height = height;
		
		// As default, it is not visible when it's first created
		this.visible = false;
		
		// Creates the Rectangle forms
		window = new Rectangle(xPos, yPos, width, height);
		dropShadow = new Rectangle(xPos + 4f, yPos + 4f, width, height);
		titleBar = new Rectangle(xPos, yPos, width, titleBarHeight);
		backgroundColor = new Color(255f, 255f, 255f, 1f);
	}
	
	/**
	 * Render
	 * @param container
	 * @param game
	 * @param g
	 * @throws SlickException
	 */
	public void render(GameContainer container, StateBasedGame game, Graphics g, Font panelFont, Font shadowFont) throws SlickException {
		
		// Only renders the Panel if it's visible
		if(visible) {
			
			Color previousColor = g.getColor();
			
			// Renders the geometry
			g.setColor(Color.gray);
			g.draw(dropShadow);
			g.setColor(Color.black);
			g.draw(window);
			g.draw(titleBar);
			
			// Fills the Panel with a solid color
			g.setColor(backgroundColor);
			g.fill(window);
			
			g.setColor(titleBackgroundColor);
			g.fill(titleBar);
			
			g.setColor(previousColor);
			
			// Renders the Title of the Panel
			shadowFont.drawString(OffsetUtil.getPreciseOffset(xPos) + 5f + 1f, OffsetUtil.getPreciseOffset(yPos) + 4f + 1f, title);
			panelFont.drawString(OffsetUtil.getPreciseOffset(xPos) + 5f, OffsetUtil.getPreciseOffset(yPos) + 4f, title);
		}
	}

	public Rectangle getWindow() {
		return window;
	}

	public void setWindow(Rectangle window) {
		this.window = window;
	}

	public Color getBackgroundColor() {
		return backgroundColor;
	}

	public void setBackgroundColor(Color backgroundColor) {
		this.backgroundColor = backgroundColor;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}
}