// 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(236,236,236); 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; //Mod1State state; public Button bupdate; public Instructions(){ super(); //this.state = state; setLayout(null); setBackground(bgcolor); bupdate = new Button("CLOSE"); bupdate.setBackground(new Color(240,240,255)); add(bupdate); //int buttonx = 380; //int buttony = 380; int buttonx = 550; int buttony = 450; 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)); g.setFont(new Font("SanSerif",Font.BOLD,16)); g.drawString("Instructions", 20,35); int deltaY = 20; int yTot = 60; //g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,14)); g.drawString("This module illustrates the phenomenon of displacement current through a parallel-plate capacitor driven",20,yTot); yTot += deltaY; g.drawString("by an alternating current.",20,yTot); g.setColor(Color.red); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.setFont(new Font("SanSerif",Font.BOLD,15)); yTot += (2*deltaY); g.drawString("Input Parameters", 20,yTot); g.setColor(Color.black); //g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,14)); yTot += deltaY; //INPUT String s = "\u2022 Frequency f of the signal"; int nextX = STR.displayString(s,g,20,yTot); yTot += deltaY; s = "\u2022 Amplitude of the sinusoidale voltage generator"; nextX = STR.displayString(s,g,20,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,20,yTot); //OUTPUT g.setColor(Color.red); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.setFont(new Font("SanSerif",Font.BOLD,15)); yTot += 2*deltaY; g.drawString("Displayed Information", 20,yTot); g.setColor(Color.black); //g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,14)); yTot += deltaY; s = "\u2022 Visual representation of charge accumulation on the capacitor plates"; nextX = STR.displayString(s,g,20,yTot); yTot += deltaY; s = "\u2022 Behavior of Electric Field and Displacement Current inside the capacitor"; nextX = STR.displayString(s,g,20,yTot); yTot += 2*deltaY; g.drawString("",20,yTot); yTot += deltaY; g.setColor(Color.red); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.setFont(new Font("SanSerif",Font.BOLD,15)); g.drawString("Assumption",20,yTot); yTot += deltaY; g.setColor(Color.black); //g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,14)); g.drawString("\u2022 The wires are perfect conductors with negligible displacement current contribution",20,yTot); yTot += deltaY; g.drawString("\u2022 The dielectric material between the capacitor plates is a perfect insulator",20,yTot); yTot += deltaY; g.drawString("\u2022 Fringing effects in the capacitor are neglected",20,yTot); 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)); g.setFont(new Font("SanSerif",Font.PLAIN,14)); 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,startingY+2*deltaY); String s = "Interactive Java"+STR.SUP+"TM"+STR.ENDSUP+ " platform: www.amanogawa.com"; int nextX = STR.displayString(s,g,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