// 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.awt.*; 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); public TextField epsilon; private Paint paint; private Image im; private Graphics buf; //Mod1State state; public Button bupdate; PlaneWave_State state; private BufferedImage bullet; public Instructions(PlaneWave_State state){ super(); this.state = state; setLayout(null); getImages(); setBackground(bgcolor); bupdate = new Button("CLOSE"); bupdate.setBackground(new Color(240,240,255)); bupdate.setFont(new Font("SanSerif",Font.PLAIN,state.font12)); add(bupdate); int buttonx = state.s550; int buttony = state.s450; int buttonwide = state.s70; int buttonheight = state.s27; 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); } private void getImages() { // read in the bullet image, because CHEERPJ does not render this // symbol in any font! (java to javascript converter) try { //bullet = ImageIO.read(getClass().getResource("bullet.png")); BufferedImage img = ImageIO.read(getClass().getResource("bullet.png")); int targetWidth = (int) (state.sfactor * img.getWidth()); int targetHeight = (int) (state.sfactor * img.getHeight()); bullet = new BufferedImage(targetWidth, targetHeight, BufferedImage.TYPE_INT_RGB); Graphics2D graphics2D = bullet.createGraphics(); graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); graphics2D.drawImage(img, 0, 0, targetWidth, targetHeight, 0, 0, img.getWidth(), img.getHeight(), null); graphics2D.dispose(); } catch (IOException e) { e.printStackTrace(); } } 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.setColor(Color.black); g.drawRect(0,0,getSize().width-1,getSize().height-1); g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.BOLD,state.font16)); g.drawString("Instructions", state.s20,state.s35); int deltaY = state.s20; int yTot = state.s60; g.setFont(new Font("SanSerif",Font.PLAIN,state.s14)); g.drawString("This module illustrates the phenomenon of displacement current through a parallel-plate capacitor driven",state.s20,yTot); yTot += deltaY; g.drawString("by an alternating current.",state.s20,yTot); g.setColor(Color.red); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); yTot += (2*deltaY); g.drawString("Input Parameters", state.s20,yTot); g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.s14)); yTot += deltaY; //INPUT //String s = "\u2022 Frequency f of the signal"; //int nextX = STR.displayString(s,g,state.s20,yTot); String s = " Frequency f of the signal"; g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); int nextX = STR.displayString(s,g,state.s20+bullet.getWidth(),yTot); yTot += deltaY; //s = "\u2022 Amplitude of the sinusoidale voltage generator"; //nextX = STR.displayString(s,g,state.s20,yTot); s = " Amplitude of the sinusoidale voltage generator"; g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); nextX = STR.displayString(s,g,state.s20+bullet.getWidth(),yTot); yTot += deltaY; //s = "\u2022 Dimensions of the capacitor and relative permittivity \u03b5"+STR.SUB+"r"+STR.ENDSUB+" of the dielectric between the plates"; //nextX = STR.displayString(s,g,state.s20,yTot); s = " Dimensions of the capacitor and relative permittivity \u03b5"+STR.SUB+"r"+STR.ENDSUB+" of the dielectric between the plates"; g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); nextX = STR.displayString(s,g,state.s20+bullet.getWidth(),yTot); //OUTPUT g.setColor(Color.red); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); yTot += 2*deltaY; g.drawString("Displayed Information", state.s20,yTot); g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); yTot += deltaY; //s = "\u2022 Visual representation of charge accumulation on the capacitor plates"; //nextX = STR.displayString(s,g,state.s20,yTot); s = " Visual representation of charge accumulation on the capacitor plates"; g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); nextX = STR.displayString(s,g,state.s20+bullet.getWidth(),yTot); yTot += deltaY; //s = "\u2022 Behavior of Electric Field and Displacement Current inside the capacitor"; //nextX = STR.displayString(s,g,state.s20,yTot); s = " Behavior of Electric Field and Displacement Current inside the capacitor"; g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); nextX = STR.displayString(s,g,state.s20+bullet.getWidth(),yTot); yTot += 2*deltaY; g.drawString("",state.s20,yTot); yTot += deltaY; g.setColor(Color.red); g.setFont(new Font("SanSerif",Font.BOLD,state.s15)); g.drawString("Assumption",state.s20,yTot); yTot += deltaY; g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); //g.drawString("\u2022 The wires are perfect conductors with negligible displacement current contribution",state.s20,yTot); g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); g.drawString(" The wires are perfect conductors with negligible displacement current contribution", state.s20+bullet.getWidth(),yTot); yTot += deltaY; //g.drawString("\u2022 The dielectric material between the capacitor plates is a perfect insulator",state.s20,yTot); g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); g.drawString(" The dielectric material between the capacitor plates is a perfect insulator", state.s20+bullet.getWidth(),yTot); yTot += deltaY; //g.drawString("\u2022 Fringing effects in the capacitor are neglected",state.s20,yTot); g.drawImage(bullet,state.s20,yTot-bullet.getHeight(),this); g.drawString(" Fringing effects in the capacitor are neglected", state.s20+bullet.getWidth(),yTot); drawCopyRight(g); //MaestroG.useBiggerFont = saveOldFlag; } public void drawCopyRight(Graphics g) { int deltaY = state.s20; int startingY = getSize().height - state.s70; int startingX = 0; FontMetrics fm; g.setColor(Color.black); g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); fm = g.getFontMetrics(); g.drawString("Applet Design: Umberto Ravaioli", startingX+15,startingY+deltaY); String s = "Interactive Java"+STR.SUP+"TM"+STR.ENDSUP+ " platform: www.amanogawa.com"; int nextX = STR.displayString(s,g,startingX+state.s15,startingY+2*deltaY); int lineLength = fm.stringWidth("Interactive JavaTM platform: www.amanogawa.com"); lineLength+= state.s10; g.drawString("All Rights Reserved",startingX+state.s15,startingY+3*deltaY); g.drawLine(startingX,startingY, startingX+lineLength+state.s25,startingY); g.drawLine(startingX+lineLength+state.s25,startingY, startingX+lineLength+state.s25,startingY+4*deltaY); } //---------------------------------------------------------------------------------------- }//End