// 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("figuree.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", 391,20); g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(14f)); int deltaY = 20; //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("Line Parameters (Z and "); lineLength += fmSmall.stringWidth("01"); MaestroG.subscripter("Line Parameters (Z","0"," and", g,14,25,90); MaestroG.subscripter("\u03b5","r",")", g,14,25+lineLength,90); //dblsubscriptor("Line Parameters (Z","01","and \u03b5","r1",")", // g,25,80); MaestroG.subscripter("Load Impedance Z","L","",g,14,25,100+deltaY); //DESIGN PROCEDURE int ystart = 20; deltaY = 22; g.drawString("The goal is to match the feedline to the load by", 391,ystart); g.drawString("connecting a separate, short-circuited line to the", 391,ystart+deltaY); g.drawString("original line at a distance d from the load.", 391,ystart+2*deltaY); g.drawString("Two solutions exist:", 391,ystart+4*deltaY); lineLength = fmNormal.stringWidth(" (a) Select d such that y ("); lineLength += fmSmall.stringWidth("1"); MaestroG.subscripter(" (a) Select d","1"," such that y (", g,14,391,ystart+6*deltaY); MaestroG.subscripter(" d","1",") = 1+ jx,", g,14,391+lineLength,ystart+6*deltaY); //dblsubscriptor(" (a) Select d","1"," such that y(d", // "1",") = 1+ jx,", g,391,ystart+5*deltaY); lineLength = fmNormal.stringWidth(" and then select "); g.drawString(" and then select ",391,ystart+7*deltaY); MaestroG.subscripterIT("l","1"," such that ", g,14,391+lineLength,ystart+7*deltaY); g.setFont(state.italicFont.deriveFont(14f)); FontMetrics fmItalic = g.getFontMetrics(); lineLength += fmItalic.stringWidth("l"); lineLength += fmSmall.stringWidth("1"); lineLength += fmNormal.stringWidth(" such that "); g.setFont(state.ttfFont.deriveFont(14f)); MaestroG.subscripter("y","s","(", g,14,396+lineLength,ystart+7*deltaY); lineLength += fmNormal.stringWidth("y("); lineLength += fmSmall.stringWidth("s"); MaestroG.subscripterIT(" l","1",") = -jx.", g,14,396+lineLength,ystart+7*deltaY); //tplsubscriptor(" and then select Z","1"," such that y","s", // "(Z","1",") = -jx.", g,351,ystart+7*deltaY); lineLength = fmNormal.stringWidth(" (b) Select d such that y ("); lineLength += fmSmall.stringWidth("2"); MaestroG.subscripter(" (b) Select d","2"," such that y (", g,14,391,ystart+9*deltaY); MaestroG.subscripter(" d","2",") = 1 - jx,", g,14,391+lineLength,ystart+9*deltaY); //dblsubscriptor(" (b) Select d","2"," such that y(d","2", // ") = 1 - jx,",g,391,ystart+8*deltaY); lineLength = fmNormal.stringWidth(" and then select "); g.drawString(" and then select ",391,ystart+10*deltaY); MaestroG.subscripterIT("l","2"," such that ", g,14,391+lineLength,ystart+10*deltaY); lineLength += fmItalic.stringWidth("l"); lineLength += fmSmall.stringWidth("2"); lineLength += fmNormal.stringWidth(" such that "); MaestroG.subscripter("y","s","(", g,14,396+lineLength,ystart+10*deltaY); lineLength += fmNormal.stringWidth("y("); lineLength += fmSmall.stringWidth("s"); MaestroG.subscripterIT(" l","2",") = jx.", g,14,396+lineLength,ystart+10*deltaY); /* lineLength = fmNormal.stringWidth(" and then select Z such that"); lineLength += fmSmall.stringWidth("2"); MaestroG.subscripter(" and then select Z","2"," such that", g,14,391,80+9*deltaY); MaestroG.subscripter(" y","s","(", g,14,391+lineLength,80+9*deltaY); lineLength += fmNormal.stringWidth(" y("); lineLength += fmSmall.stringWidth("s"); MaestroG.subscripter("Z","2",") = jx.", g,14,391+lineLength,80+9*deltaY); */ //tplsubscriptor(" and then select Z","2"," such that y","s", // "(Z","2",") = jx.",g,351,80+9*deltaY); g.drawString("The final output is a plot of | \u0393 |, as seen by", 391,ystart+12*deltaY); g.drawString("the feedline, as a function of frequency.", 391,ystart+13*deltaY); //g.drawImage(figure,10,250,this); g.drawImage(figure,20,175,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