// About.java
/* A Java class for
 * LineImpedance.java
 * Electromagnetic Transmission Line Applet
 * Applet without Smith Chart - Prepared by Umberto Ravaioli 
 * for 6th edition of Fundamentals of Applied Electromagnetics Book
 * May 2009 - All Rights Reserved
 */   


import java.io.*;
import java.applet.*;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.awt.event.*;
import java.awt.font.*;
import java.net.URL;
import java.text.*;
import java.util.*;
import java.util.Map;
import java.util.Hashtable;
import java.util.jar.Attributes;


public class Instructions extends Panel {
    
    private static final Color bgcolor = new Color(255,255,250);
    //private static final Color bgcolor = Color.white;
    
    public TextField epsilon;
    private Paint paint;
    
    private Image im;
    private Graphics buf;

    Trans_State state;
  
    public Button bupdate;


    public Instructions(Trans_State state){
	super();
        this.state = state;
	setLayout(null);
	setBackground(bgcolor);

	// update button
	bupdate = new Button("CLOSE");
        bupdate.setBackground(new Color(240,240,255));
	add(bupdate);
        //int buttonx = 400;
        //int buttony = 300;
        int buttonx = 430;
        int buttony = 550;
        int buttonwide = 70;
        int buttonheight = 27;
        
        bupdate.setBounds(buttonx,buttony,buttonwide,buttonheight);	
        Panel ps7 = new Panel();
	    ps7.setBackground(Color.lightGray);
	    add(ps7);
	    ps7.setBounds(buttonx-1,buttony-1,buttonwide+2,buttonheight+2);
	    
	Panel ps8 = new Panel();
	    ps8.setBackground(Color.black);
	    add(ps8);
	    ps8.setBounds(buttonx-2,buttony-2,buttonwide+4,buttonheight+4);
	
    }
    
    public void paint(Graphics g){
            
	    if(im == null){
		im = createImage(getSize().width,getSize().height);
		buf = im.getGraphics();
		drawCanvas(buf);
	    }
	    else{
		drawCanvas(buf);
	    }
	    g.drawImage(im,0,0,null);
    }
	
	//Addition to reduce flicker new routine
    public void update(Graphics g){		// added to avoid clearing
            paint(g);
    }
    
    public void clear(){
	    this.getGraphics().clearRect(0,0,getSize().width,getSize().height);
	    repaint();
    }
    
    public void drawCanvas(Graphics g){
        FontMetrics fm;
        Graphics2D g2d = (Graphics2D)g;
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                             RenderingHints.VALUE_ANTIALIAS_ON);        
        g.clearRect(0,0,getSize().width-1,getSize().height-1);

        boolean saveOldFlag = MaestroG.useBiggerFont;
        MaestroG.useBiggerFont = false;
        
        g.setColor(Color.black);
        g.drawRect(0,0,getSize().width-1,getSize().height-1);
        g.setFont(state.ttfFont.deriveFont(Font.BOLD,16f));

        g.drawString("Instructions", 15,15);
        g.setColor(Color.red);
        g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f));
        g.drawString("Input", 25,90);
        g.setColor(Color.black);
        g.setFont(state.ttfFont.deriveFont(14f));
        int deltaY = 22;
        //INPUT
        g.drawString("\u2022 Characteristic impedance", 25,120);
        FontMetrics fmNormal, fmSmall;
        g.setFont(state.ttfFont.deriveFont(12f));
        fmSmall = g.getFontMetrics();
        g.setFont(state.ttfFont.deriveFont(14f));
        fmNormal = g.getFontMetrics();
        int lineLength = fmNormal.stringWidth("\u2022 Specify Z, ");
        lineLength += fmSmall.stringWidth("L");
        MaestroG.subscripter("\u2022 Specify Z","L",", ",
                             g,14,25,120+2*deltaY);
        MaestroG.subscripter("Y","L",", \u0393, or use mouse to position load on Smith Chart",
                             g,14,25+lineLength,120+2*deltaY);
        //g.drawString("   use mouse to position load on Smith Chart",25,125+3*deltaY);
        g.drawString("\u2022 Use cursor to move towards the source", 25,120+4*deltaY);
        //OUTPUT
        int newY = 100+6*deltaY + 40;
        g.setColor(Color.red);
        g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f));
        g.drawString("Displayed Information", 25,newY);
        g.setColor(Color.black);
        g.setFont(state.ttfFont.deriveFont(14f));

        newY += 40; deltaY = 25;
        g.drawString("\u2022 SWR circle", 25,newY);
        lineLength = fmNormal.stringWidth("   r and ");
        lineLength += fmSmall.stringWidth("L");
        //dblsubscriptor("r","L"," and x","L"," circles",g,450,80+deltaY);
        MaestroG.subscripter("\u2022 r","L"," and",g,14,25,newY+deltaY);
        MaestroG.subscripter(" x","L"," circles",g,14,25+lineLength,newY+deltaY);
        g.drawString("\u2022 \u0393 = Load Reflection Coefficient",25,newY+2*deltaY);
        lineLength = fmNormal.stringWidth("\u2022 \u0393 = \u0393");
        lineLength += fmSmall.stringWidth("d   ");
        MaestroG.subscripter("\u2022 \u0393","d"," = \u0393",g,14,25,newY+3*deltaY);
        MaestroG.superscripter("e","-j2\u03b2d",", phase-shifted Reflection "+
                               "Coefficient",g,14,25+lineLength,newY+3*deltaY);
        g.drawString("\u2022 Z(d) = Line Impedance",25,newY+4*deltaY);
        g.drawString("\u2022 y(d) = Line Admittance",25,newY+5*deltaY);
        g.drawString("\u2022 S = Voltage-Standing-Wave-Ratio",25,newY+6*deltaY);
             
        drawCopyRight(g);

        MaestroG.useBiggerFont = saveOldFlag;

    }


    public void drawCopyRight(Graphics g) {
        int deltaY = 20;
        int startingY = getSize().height - 70;
        int startingX = 0;
        FontMetrics fm;
        g.setColor(Color.black);
        g.setColor(Color.black);
        //g.setFont(normalfont14);
        g.setFont(state.ttfFont.deriveFont(14f));
        fm = g.getFontMetrics();
        g.drawString("Applet Design: Umberto Ravaioli",
                     startingX+15,startingY+deltaY);
        
        MaestroG.superscripter("Interactive Java","TM"," platform:  www.amanogawa.com",
                               g,14,startingX+15,startingY+2*deltaY);
        int lineLength = fm.stringWidth("Interactive JavaTM platform:  www.amanogawa.com");
        lineLength += 10;

        g.setFont(state.ttfFont.deriveFont(14f));
        g.drawString("All Rights Reserved",startingX+15,startingY+3*deltaY);
        g.drawLine(startingX,startingY,
                   startingX+lineLength+25,startingY);
        g.drawLine(startingX+lineLength+25,startingY,
                   startingX+lineLength+25,startingY+4*deltaY);
    }


//----------------------------------------------------------------------------------------    
}//End
    

