// 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; import java.awt.image.BufferedImage; //import java.io.IOException; import javax.imageio.ImageIO; public class Instructions extends Panel { private static final Color bgcolor = new Color(255,255,245); //private static final Color bgcolor = Color.white; public TextField epsilon; private Paint paint; private Image im; private Graphics buf; private BufferedImage figure; public Button bupdate; StateVars state; public Instructions (StateVars 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 buttonx = 160; //int buttony = 300; int buttonx = 490; int buttony = 390; 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); //g.setFont(font_one); //fm = g.getFontMetrics(); boolean saveOldFlag = MaestroG.useBiggerFont; MaestroG.useBiggerFont = false; g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(Font.BOLD,16f)); try { figure = ImageIO.read(getClass().getResource("figureb.gif")); } catch (IOException e) { e.printStackTrace(); } g.drawString("Instructions", 20,25); g.setColor(Color.red); g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.drawString("Input", 25,60); //g.drawString("Design Procedure", 325,50); g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(14f)); int deltaY = 20; int starty = 30; //INPUT 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("Main Line Parameters (Z and "); lineLength += fmSmall.stringWidth("01"); MaestroG.subscripter("Main Line Parameters (Z","01","and",g,14,25,90); MaestroG.subscripter("\u03b5","r1",")",g,14,25+lineLength,90); //dblsubscriptor("Line Parameters (Z","01","and \u03b5","r1",")", // g,25,80); MaestroG.subscripter("Load Impedance Z","L","",g,14,25,90+deltaY); //DESIGN PROCEDURE g.drawString("The goal is to select:", 391,starty); g.drawString(" (a) the distance d from the load at which to insert", 391,starty+2*deltaY); g.drawString(" the \u03bb/4 transformer. This is done such that", 391,starty+3*deltaY); g.drawString(" at d, Z(d) is purely real, which corresponds to ", 391,starty+4*deltaY); g.drawString(" the locations of voltage maxima and minima: ", 391,starty+5*deltaY); lineLength = fmNormal.stringWidth(" d = dmax and "); lineLength += fmSmall.stringWidth("1"); MaestroG.subscripter(" d","1"," = dmax and ", g,14,391,starty+6*deltaY); MaestroG.subscripter("d","2"," = dmin (2 solutions)", g,14,391+lineLength,starty+6*deltaY); lineLength = fmNormal.stringWidth(" (b) If d = d"); lineLength += fmSmall.stringWidth("1"); MaestroG.subscripter(" (b) If d = d","1","", g,14,391,starty+8*deltaY); //g.setFont(new Font("Symbol",Font.PLAIN,16)); //FontMetrics fmSymbol = g.getFontMetrics(); //g.drawString(" \u21d2 ",325+lineLength,80+8*deltaY); //lineLength += fmSymbol.stringWidth(" \u21d2 "); g.drawString(" then ",391+lineLength,starty+8*deltaY); lineLength += fmNormal.stringWidth(" then "); g.setFont(state.ttfFont.deriveFont(14f)); MaestroG.subscripter("Z","02"," = ", g,14,391+lineLength,starty+8*deltaY); lineLength += fmNormal.stringWidth("Z = "); lineLength += fmSmall.stringWidth("02"); MaestroG.subscripter("\u221AZ","01","Z(", g,14,391+lineLength,starty+8*deltaY); int xstart = 391+lineLength+fmNormal.stringWidth("\u221A"); lineLength += fmNormal.stringWidth("\u221AZZ("); lineLength += fmSmall.stringWidth("01"); MaestroG.subscripter("d","1",")", g,14,391+lineLength,starty+8*deltaY); int xend = xstart + fmNormal.stringWidth("ZZ(d)")+ fmSmall.stringWidth("011"); //dblsubscriptor(" (b) If d = dmax, Z","02"," = \u221AZ","01", // "Z(dmax)",g,325,80+6*deltaY); g.drawLine(xstart-2,starty+8*deltaY - 14,xend,starty+8*deltaY - 14); lineLength = fmNormal.stringWidth(" (c) If d = d"); lineLength += fmSmall.stringWidth("2"); MaestroG.subscripter(" (c) If d = d","2","", g,14,391,starty+10*deltaY); //g.setFont(new Font("Symbol",Font.PLAIN,16)); //g.drawString(" \u21d2 ",325+lineLength,80+10*deltaY); //lineLength += fmSymbol.stringWidth(" \u21d2 "); g.drawString(" then ",391+lineLength,starty+10*deltaY); lineLength += fmNormal.stringWidth(" then "); g.setFont(state.ttfFont.deriveFont(14f)); MaestroG.subscripter("Z","02"," = ", g,14,391+lineLength,starty+10*deltaY); lineLength += fmNormal.stringWidth("Z = "); lineLength += fmSmall.stringWidth("02"); MaestroG.subscripter("\u221AZ","01","Z(", g,14,391+lineLength,starty+10*deltaY); xstart = 391+lineLength+fmNormal.stringWidth("\u221A"); lineLength += fmNormal.stringWidth("\u221AZZ("); lineLength += fmSmall.stringWidth("01"); MaestroG.subscripter("d","2",")", g,14,391+lineLength,starty+10*deltaY); xend = xstart + fmNormal.stringWidth("ZZ(d)")+ fmSmall.stringWidth("012"); //dblsubscriptor(" (c) If d = dmin, Z","02"," = \u221AZ","01", // "Z(dmin)",g,325,80+10*deltaY); g.drawLine(xstart-2,starty+10*deltaY - 14,xend,starty+10*deltaY - 14); /* lineLength = fmNormal.stringWidth(" (c) If d = dmin, Z = "); lineLength += fmSmall.stringWidth("02"); MaestroG.subscripter(" (c) If d = dmin, Z","02"," =", g,14,325,80+10*deltaY); MaestroG.subscripter("\u221AZ","01","Z(dmin)", g,14,325+lineLength,80+8*deltaY); //dblsubscriptor(" (c) If d = dmin, Z","02"," = \u221AZ","01", // "Z(dmin)",g,325,80+7*deltaY); xstart = 325+lineLength+fmNormal.stringWidth("\u221A"); xend = xstart; xend += fmNormal.stringWidth("ZZ(dmin)"); xend += fmSmall.stringWidth("01"); //int sqrtHeight = fmNormal.stringHeight("\u221A"); //System.out.println("sqrtHeight = "+String.valueOf(sqrtHeight)); g.drawLine(xstart-2,80+8*deltaY - 14,xend,80+8*deltaY - 14); */ g.drawImage(figure,20,200,this); 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