/**
@author  Scott Marshall
@author  University of Glasgow, MSc IT Project 2001
@author  Building an OnLine Course in Computing Fundamentals

*/

package ukacgla_ATT;

import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

/** Provides drawing instruction for logic gates. */
abstract public class circuitGraphics extends JPanel{

	private	int scale = 30;
	public JInternalFrame graphicsFrame;
	protected frameMaker gui;
	protected TTRandom random;
	protected JPanel host;

	
	public circuitGraphics(frameMaker g, TTRandom r){
		gui = g;
		random = r;
		host = this;
		graphicsFrame = gui.mkFrame("Circuit Diagram", false, true,5,gui.getInternalFrameHeight()+10, 500, 275);
		graphicsFrame.getContentPane().add(host);
		gui.addFrame(graphicsFrame);	
		graphicsFrame.setVisible(true);	
		graphicsFrame.revalidate();

 	}

	
	/**
	Gate 1 to be drawn at point 50,35 
	Gate 2 to be drawn at point 50,165
	Gate 3 to be drawn at point 300,100
	*/
    public void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;		//Instantiate graphics object
    }
	
	/** Draws an Inverter gate at specified location		*/
	protected  void drawInverter(Graphics g, int xStart, int yStart)	{
		int[] xPoints =	{ xStart,xStart,xStart+scale };
		int[] yPoints = { yStart,yStart+scale,yStart+(scale/2)};
		int nPoints = 3;
		
		//draw and fill polygon
		g.setColor(Color.white);
		g.fillPolygon(xPoints,yPoints,nPoints);
		g.setColor(Color.black);		
		
		//draw triangle to complete the border
		g.drawLine(xStart,yStart,xStart,yStart+scale);
		g.drawLine(xStart,yStart+scale,xStart+scale,yStart+(scale/2));
		g.drawLine(xStart+scale,yStart+(scale/2),xStart,yStart);

		//draw circle at the end of the triangle
		drawInverterCircle(g, xStart-15, yStart);
	}		


	/** Draws an And gate at specified location	*/
	protected void drawAndGate(Graphics g, int xStart, int yStart){
		//draw basic white shapes
		g.setColor(Color.white);		
		g.fillRect(xStart,yStart,scale,scale);
		g.fillArc(xStart+(scale/2),yStart,scale,scale,0,360);
		
		//draw borders
		g.setColor(Color.black);		
		g.drawArc(xStart+(scale/2),yStart,scale,scale,0,90);	
		g.drawArc(xStart+(scale/2),yStart,scale,scale,0,-90);
		g.drawLine(xStart,yStart,xStart+scale,yStart);
		g.drawLine(xStart,yStart,xStart,yStart+scale);
		g.drawLine(xStart,yStart+scale,xStart+scale,yStart+scale);
	}

	/** Draws a Nand gate at specified location	 */
	protected void drawNandGate(Graphics g, int xStart, int yStart){
		drawAndGate(g, xStart, yStart);
		drawInverterCircle(g, xStart, yStart);
	}

	/** Draws an Or gate at specified location	*/	
	protected void drawOrGate(Graphics g, int xStart, int yStart)	{
		int[] xPoints =	{xStart,xStart+5,xStart+10,xStart+15,xStart+20,xStart+25,
						xStart+30,xStart+25,xStart+20,xStart+15,xStart+10,xStart+5, 
						xStart,xStart+2,xStart+4,xStart+5,xStart+4,xStart+2,xStart };
		int[] yPoints = {yStart,yStart,yStart+1,yStart+3,yStart+6,yStart+10,
						yStart+15,yStart+20,yStart+24,yStart+27,yStart+29,yStart+30,yStart+30,yStart+25,
						yStart+20,yStart+15,yStart+10,yStart+5,yStart  };
		int nPoints = 19;	
	
		g.setColor(Color.white);
		g.fillPolygon(xPoints,yPoints,nPoints);
		g.setColor(Color.black);
		g.drawPolygon(xPoints,yPoints,nPoints);	
	}	


	/** Draws an ExclusiveOr gate at specified location	*/
	protected void drawXOrGate(Graphics g, int xStart, int yStart){
		//draw body
		int[] xPoints =	{xStart,xStart+5,xStart+10,xStart+15,xStart+20,xStart+25,
						xStart+30,xStart+25,xStart+20,xStart+15,xStart+10,xStart+5, 
						xStart,xStart+2,xStart+4,xStart+5,xStart+4,xStart+2,xStart };
		int[] yPoints = {yStart,yStart,yStart+1,yStart+3,yStart+6,yStart+10,
						yStart+15,yStart+20,yStart+24,yStart+27,yStart+29,yStart+30,yStart+30,yStart+25,
						yStart+20,yStart+15,yStart+10,yStart+5,yStart  };
		int nPoints = 19;	
	
		g.setColor(Color.white);
		g.fillPolygon(xPoints,yPoints,nPoints);
		g.setColor(Color.black);
		g.drawPolygon(xPoints,yPoints,nPoints);	
		
		// draw rear line
		int rearStart = xStart-scale;
		g.drawArc(rearStart,yStart,scale,scale,0,2 * scale);	
		g.drawArc(rearStart,yStart,scale,scale,0,-2 * scale);		
	
	}
	
	
	/** Draws a circle at the end of a symbol at specified location	 */
	protected void drawInverterCircle(Graphics g, int xStart, int yStart){
		int diameter = 10;
		g.setColor(Color.white);
		g.fillOval(xStart + scale + scale/2, yStart+(scale/2)-(diameter/2),diameter,diameter);
		g.setColor(Color.black);
		g.drawOval(xStart + scale + scale/2, yStart+(scale/2)-(diameter/2),diameter,diameter);
	}
	
	

	/** Closes JInternalFrame holding the circuit diagram */	
	public void closeFrame(){
		gui.closeFrame(graphicsFrame);
		
	}

}//ends class