package ciips.animation;

import java.awt.*;


/**
 * This is just another example implementation of the <code>DrawingObj</code>
 * interface. It creates a small Legend describing the color code used
 * in the drawing panel. This class has to be modified for different
 * application. The <code>draw</code> method has to be re-implemented
 * to reflex a particular application. This drawing object can be added
 * to the drawing panel by: <code><pre>
 *	drawingPanel.addDrawingObj(new Legend(x, y));
 * </pre></code>
 * @see ComBox
 * @see IntMatrix
 */
public class Legend implements DrawingObj {
    private int x, y, padd = 10;
    private Font font = new Font("Helvetica", Font.BOLD, 18);
    private Font font2 = new Font("Helvetica", Font.BOLD, 14);
    private Font smallfont = new Font("Helvetica", Font.PLAIN, 12);
    private Dimension pref_size;

    /**
     * Construct a legend object on the same drawing panel with the topleft
     * corner specified by the parameters.
     * @param x Left most position of the legend object.
     * @param y Right most position of the legend object.
     */
    public Legend(int x, int y, Dimension d ) {
	this.x = x;
	this.y = y;
	this.pref_size = d;
    }

    /**
     * Move the object to the position as specified by the parameter.
     * This coordinate represents the topleft corner of the object.
     * @param x The left most position of the legend object.
     * @param y The right most position of the legend object.
     */
    public void move(int x, int y) {
	this.x = x;
	this.y = y;
    }

    /**
     * Get the left most position of the legend object. This method is not
     * actually used. Just there for completeness when implementing the
     * <code>DrawingObj</code> interface.
     * @return The left most position of the legend object.
     */
    public int getX() {
	return x;
    }

    /**
     * Get the top most position of the legend object. This method is not
     * actually used. Just there for completeness when implementing the
     * <code>DrawingObj</code> interface.
     * @return The top most position of the legend object.
     */
    public int getY() {
	return y;
    }

    /**
     * This method draws the details of the legend object on the appropriate
     * graphical context, normally the drawing panel.
     * This method has to be modified for various application.
     */
    public void draw(Graphics g) {
	int dx, dy, pos_x, fontSize;

      dx = 10;
      dy = pref_size.height / 12 ;
      pos_x = 30;
	fontSize = 15;
        
	// Draw the Frame and the title for the panel
	g.setColor(Color.gray);
	g.setFont(font);
	g.drawString("LEGEND", x + 4*dx+1, y + dy+1);
	g.setColor(Color.red);
	g.drawString("LEGEND", x + 4*dx, y + dy);
	g.setColor(Color.black);
      g.drawRect(x , y, pref_size.width - padd, pref_size.height - padd );
      g.drawLine(x, y + 2*dy, x + pref_size.width - padd, y + 2*dy);

	// Draw the information on Active Node
	g.setColor(Color.black);
	g.fillRect(x + dx, y + 3*dy - fontSize, 10, 10);
	g.drawRect(x + dx, y + 3*dy - fontSize, 10, 10);
	g.setFont(font2);
	g.setColor(Color.black);
	g.drawString("Active Node", x + pos_x, y + 3*dy);
      g.setFont(smallfont);
	g.drawString(" Node with a value ", x + pos_x, (y + 3*dy + fontSize) );
	g.drawString(" ( Leaf node )", x + pos_x, (y + 3*dy + 2*fontSize));

	//Draw the information on Inactive node
	g.setColor(Color.white);
	g.fillRect(x + dx, y + 5*dy - fontSize, 10, 10);
	g.setColor(Color.black);
	g.drawRect(x + dx, y + 5*dy - fontSize, 10, 10);
	g.setFont(font2);
	g.setColor(Color.black);
	g.drawString("Inactive Node", x + pos_x, y + 5*dy);
      g.setFont(smallfont);
	g.drawString(" Node with null value ", x + pos_x, (y + 5*dy + fontSize));
	g.drawString(" (intermediate node) ", x + pos_x, (y + 5*dy + 2*fontSize));


	// Draw the information on Highlighted node
      g.setColor(Color.yellow);
	g.fillRect(x+dx, y+ 7*dy - fontSize, 10, 10);
	g.setColor(Color.black);
	g.drawRect(x+dx, y+ 7*dy - fontSize, 10, 10);
	g.setFont(font2);
	g.setColor(Color.black);
	g.drawString("Current Node", x + pos_x, y + 7*dy);
      g.setFont(smallfont);
	g.drawString("The position of current Node", x + pos_x, (y + 7*dy + fontSize));

	// Draw the end-of-word symbol
	g.setFont(font2);
	g.setColor(Color.black);
	g.drawString("@", x + dx, y + 9*dy);
	g.drawString("End-of-String Symbol", x + pos_x, y + 9*dy);
      g.setFont(smallfont);
	g.drawString(" A symbol that marks", x + pos_x, (y + 9*dy + fontSize));
	g.drawString(" the end of a String", x + pos_x, (y + 9*dy + 2*fontSize));
    }
}