// 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 javax.imageio.ImageIO; import java.io.IOException; 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; //Mod1State state; public Button closeIt; PlaneWave_State state; private BufferedImage bullet; public Instructions(PlaneWave_State state){ super(); this.state = state; setLayout(null); getImages(); setBackground(bgcolor); closeIt = new Button("CLOSE"); closeIt.setBackground(new Color(240,240,255)); closeIt.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); add(closeIt); int buttonx = state.s400+state.s30; int buttony = state.s500+state.s50; int buttonwide = state.s70; int buttonheight = state.s27; closeIt.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.setFont(state.ttfFont.deriveFont(Font.BOLD,16f)); g.setFont(new Font("SanSerif",Font.BOLD,state.font16)); g.drawString("Instructions", state.s15,state.s25); g.setColor(Color.red); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); g.drawString("Input", state.s15,state.s60); g.setColor(Color.black); //g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); int deltaY = state.s20; //INPUT //String s = "\u2022 Select the initial location of the electron "+ // "(x"+STR.SUB+"0"+STR.ENDSUB+",y"+STR.SUB+"0"+STR.ENDSUB+")"; //int nextX = STR.displayString(s,g, state.s15,state.s85); g.drawImage(bullet,state.s15,state.s85-bullet.getHeight(),this); String s = " Select the initial location of the electron "+ "(x"+STR.SUB+"0"+STR.ENDSUB+",y"+STR.SUB+"0"+STR.ENDSUB+")"; int nextX = STR.displayString(s,g, state.s15+bullet.getWidth(),state.s85); //s = "\u2022 Select the initial velocity of the electron "+STR.VBAR+ // "u"+STR.ENDVBAR+" = "+STR.HAT+"x"+STR.ENDHAT+"u"+STR.SUB+"x"+ // STR.ENDSUB+STR.SUBSUB+"0"+STR.ENDSUBSUB+"+"+STR.HAT+"y"+ // STR.ENDHAT+"u"+STR.SUB+"y"+STR.ENDSUB+STR.SUBSUB+"0"+STR.ENDSUBSUB; //nextX = STR.displayString(s,g, state.s15,state.s85+deltaY); g.drawImage(bullet,state.s15,state.s85+deltaY-bullet.getHeight(),this); s = " Select the initial velocity of the electron "+STR.VBAR+ "u"+STR.ENDVBAR+" = "+STR.HAT+"x"+STR.ENDHAT+"u"+STR.SUB+"x"+ STR.ENDSUB+STR.SUBSUB+"0"+STR.ENDSUBSUB+"+"+STR.HAT+"y"+ STR.ENDHAT+"u"+STR.SUB+"y"+STR.ENDSUB+STR.SUBSUB+"0"+STR.ENDSUBSUB; nextX = STR.displayString(s,g, state.s15+bullet.getWidth(),state.s85+deltaY); //s = "\u2022 Select the electric field "+STR.VBAR+"E"+STR.ENDVBAR+ // " = "+STR.HAT+"x"+STR.ENDHAT+"E"+STR.SUB+"x"+STR.ENDSUB+"+"+ // STR.HAT+"y"+STR.ENDHAT+"E"+STR.SUB+"y"+STR.ENDSUB; //nextX = STR.displayString(s,g, state.s15,state.s85+2*deltaY); g.drawImage(bullet,state.s15,state.s85+2*deltaY-bullet.getHeight(),this); s = " Select the electric field "+STR.VBAR+"E"+STR.ENDVBAR+ " = "+STR.HAT+"x"+STR.ENDHAT+"E"+STR.SUB+"x"+STR.ENDSUB+"+"+ STR.HAT+"y"+STR.ENDHAT+"E"+STR.SUB+"y"+STR.ENDSUB; nextX = STR.displayString(s,g, state.s15+bullet.getWidth(),state.s85+2*deltaY); //s = "\u2022 Select the magnetic field "+STR.VBAR+"H"+STR.ENDVBAR+ // " = "+STR.HAT+"z"+STR.ENDHAT+"H"+STR.SUB+"z"+STR.ENDSUB; //nextX = STR.displayString(s,g, state.s15,state.s85+3*deltaY); g.drawImage(bullet,state.s15,state.s85+3*deltaY-bullet.getHeight(),this); s = " Select the magnetic field "+STR.VBAR+"H"+STR.ENDVBAR+ " = "+STR.HAT+"z"+STR.ENDHAT+"H"+STR.SUB+"z"+STR.ENDSUB; nextX = STR.displayString(s,g, state.s15+bullet.getWidth(),state.s85+3*deltaY); //g.drawString("\u2022 Select the time step between updates", // state.s15,state.s85+4*deltaY); g.drawImage(bullet,state.s15,state.s85+4*deltaY-bullet.getHeight(),this); g.drawString(" Select the time step between updates", state.s15+bullet.getWidth(),state.s85+4*deltaY); //OUTPUT int newY = state.s120+2*deltaY; g.setColor(Color.red); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); newY = newY+2*deltaY; g.drawString("Displayed Information", state.s15,newY); g.setColor(Color.black); //g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); newY += state.s25; //s = "\u2022 Select to observe either:"; //nextX = STR.displayString(s,g, state.s15,newY); g.drawImage(bullet,state.s15,newY-bullet.getHeight(),this); s = " Select to observe either:"; nextX = STR.displayString(s,g, state.s15+bullet.getWidth(),newY); newY += deltaY; s = " (a) the electron motion in the x-y plane with the electric "+"and magnetic"; nextX = STR.displayString(s,g,state.s15,newY); newY += deltaY; s = " forces acting on it displayed as red and blue arrows, "+ "respectively, or"; nextX = STR.displayString(s,g,state.s15,newY); s = " (b) the trace generated by the moving electron"; newY += deltaY; nextX = STR.displayString(s,g,state.s15,newY); newY += 15*deltaY/10; //s = "\u2022 Select to place the electron inside a closed boundary "+ // "or in an open"; //nextX = STR.displayString(s,g,state.s15,newY); g.drawImage(bullet,state.s15,newY-bullet.getHeight(),this); s = " Select to place the electron inside a closed boundary "+ "or in an open"; nextX = STR.displayString(s,g,state.s15+bullet.getWidth(),newY); s = " boundary"; newY += deltaY; nextX = STR.displayString(s,g,state.s15,newY); g.setColor(Color.red); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); newY = newY+2*deltaY; g.drawString("Time Step Selection", state.s15,newY); g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); newY += state.s25; s = "Accuracy of the time-dependent simulation depends on the choice of time step."; nextX = STR.displayString(s,g, state.s15,newY); newY += + deltaY; s = "A maximum recommended time step is given in order to reproduce faithfully a"; nextX = STR.displayString(s,g, state.s15,newY); newY += + deltaY; s = "long series of boundary reflections with the ''closed boundary'' option selected."; nextX = STR.displayString(s,g, state.s15,newY); newY += + deltaY; s = "In order to speed up the animation, in general it is fine to increase the time step"; nextX = STR.displayString(s,g, state.s15,newY); newY += + deltaY; s = "particularly when ''open boundary'' is selected, without loss of accuracy."; nextX = STR.displayString(s,g, state.s15,newY); g.setColor(Color.blue); newY += + deltaY + state.s5; s = "If the particle trace does not appear continuous, reduce the time step instead."; nextX = STR.displayString(s,g, state.s15,newY); drawCopyRight(g); //MaestroG.useBiggerFont = saveOldFlag; } public void drawCopyRight(Graphics g) { int deltaY = state.s20; int startingY = getSize().height - state.s70; int startingX = 0; int DeltaX = state.s10; 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,state.font14)); fm = g.getFontMetrics(); g.drawString("Applet Design: Umberto Ravaioli", startingX+DeltaX,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+DeltaX,startingY+2*deltaY); int lineLength = fm.stringWidth("Interactive JavaTM platform: www.amanogawa.com"); lineLength+= state.s10; //g.setFont(state.ttfFont.deriveFont(14f)); g.drawString("All Rights Reserved",startingX+DeltaX,startingY+3*deltaY); g.drawLine(startingX,startingY+state.s5, startingX+lineLength+state.s10,startingY+state.s5); g.drawLine(startingX+lineLength+state.s10,startingY+state.s5, startingX+lineLength+state.s10,startingY+4*deltaY); } //---------------------------------------------------------------------------------------- }//End