// 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 javax.imageio.ImageIO; import java.io.IOException; public class Instructions extends Panel { //private static final Color bgcolor = new Color(236,236,236); private static final Color bgcolor = Color.white; public TextField epsilon; private Paint paint; private Image im; private Graphics buf; private BufferedImage figure; Mod1State state; public Button closeIt; private BufferedImage bullet; public Instructions(Mod1State state){ super(); this.state = state; setLayout(null); getImages(); setBackground(bgcolor); closeIt = new Button("CLOSE"); closeIt.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); closeIt.setBackground(new Color(240,240,255)); add(closeIt); int buttonx = state.s440; int buttony = state.s440; 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.setFont(font_one); //fm = g.getFontMetrics(); //boolean saveOldFlag = MaestroG.useBiggerFont; //MaestroG.useBiggerFont = false; try { figure = ImageIO.read(getClass().getResource("mod5.1302.gif")); } catch (IOException e) { e.printStackTrace(); } int xstart, ystart, ystart2, newY; xstart = state.s40; ystart = state.s30; ystart2 = state.s60; newY = ystart2; g.setColor(Color.black); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,16f)); g.setFont(new Font("SanSerif",Font.BOLD,state.font16)); g.drawString("Instructions", xstart,ystart); g.setColor(Color.red); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); g.drawString("Input", xstart,newY); //g.drawString("Output", 230,50); g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); newY += state.s20; int deltaY = state.s20; //INPUT //String s = "\u2022 Place line sources carrying currents flowing"+ // " in the positive "; //int nextX = STR.displayString(s,g, xstart,newY); g.drawImage(bullet,xstart,newY-bullet.getHeight(),this); String s = " Place line sources carrying currents flowing"+ " in the positive "; int nextX = STR.displayString(s,g, xstart+bullet.getWidth(),newY); s = " or negative "+STR.BOLD+"z"+STR.ENDBOLD+"-direction in the"+ " display plane (x-y plane)"; nextX = STR.displayString(s,g, xstart,newY+deltaY); //g.drawString("\u2022 You can select line sources"+ // " on the canvas, move them to ", xstart,newY+2*deltaY); g.drawImage(bullet,xstart,newY+2*deltaY-bullet.getHeight(),this); g.drawString(" You can select line sources"+ " on the canvas, move them to ", xstart+bullet.getWidth(),newY+2*deltaY); g.drawString(" different locations, and change their values", xstart,newY+3*deltaY); //OUTPUT g.setColor(Color.red); //g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); newY = state.s70+4*deltaY+state.s30; g.drawString("Displayed Information", xstart,newY); g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); newY += state.s20; //s = "\u2022 Spatial pattern of the magnetic flux "+ // STR.BOLD+"B"+STR.ENDBOLD+"(x,y) "; //nextX = STR.displayString(s,g, xstart,newY); g.drawImage(bullet,xstart,newY-bullet.getHeight(),this); s = " Spatial pattern of the magnetic flux "+ STR.BOLD+"B"+STR.ENDBOLD+"(x,y) "; nextX = STR.displayString(s,g, xstart+bullet.getWidth(),newY); //s = "\u2022 Magnitude and direction of "+STR.BOLD+"B"+STR.ENDBOLD+ // "(x,y) at cursor location (x,y)"; //nextX = STR.displayString(s,g,xstart,newY+deltaY); g.drawImage(bullet,xstart,newY+deltaY-bullet.getHeight(),this); s = " Magnitude and direction of "+STR.BOLD+"B"+STR.ENDBOLD+ "(x,y) at cursor location (x,y)"; nextX = STR.displayString(s,g,xstart+bullet.getWidth(),newY+deltaY); //g.drawImage(figure,state.s10,state.s290,this); drawCopyRight(g); //MaestroG.useBiggerFont = saveOldFlag; //Draw scalable picture ------------------------------------------------ g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON); int x1, x2, x3, x4, y1, y2, y3, y4, th1; // Just move these two points to shift the picture x1 = state.s60; y1 = state.s435; //---------------------------------------------------------------------- x2 = x1 + state.s80; y2 = y1 - state.s120; x3 = x1 + state.s270; y3 = y1 - state.s120; x4 = x1 + state.s230; y4 = y1; //---------------------------------------------------------------------- th1 = state.s8; // Bottom part of wires MaestroG.drawLineThickA(g,(double)((x2 - state.s10)),(double)((y4+y3)/2+state.s120), (double)((x2 - state.s10)),(double)((y3+3*(y4-y3)/4)),th1,Color.red); // highlights MaestroG.drawLineThick(g,(double)((x2 - state.s12)),(double)((y4+y3)/2+state.s123), (double)((x2 - state.s12)),(double)((y3+3*(y4-y3)/4)+state.s3),state.s2,Color.white); MaestroG.drawLineThick(g,(double)((x2 - state.s11+1)),(double)((y4+y3)/2+state.s123), (double)((x2 - state.s11+1)),(double)((y3+3*(y4-y3)/4)+state.s3),state.s1,Color.pink); // current vector pointing down g.setColor(Color.red); MaestroG.drawArrowScaled( (x2 - state.s10), (y4+y3)/2+state.s140, 2, 2*state.sfactor, g); MaestroG.drawLineThickA(g,(double)(x2 - state.s10), (double)((y4+y3)/2+state.s145), (double)(x2 - state.s10), (double)((y4+y3)/2+state.s130),state.s2,Color.red); MaestroG.drawLineThickA(g,(double)((x4 - state.s20)),(double)((y4+y3)/2+state.s80), (double)((x4 - state.s20)),(double)((y3+(y4-y3)/4)),th1,Color.red); // highlights MaestroG.drawLineThick(g,(double)((x4 - state.s22)),(double)((y4+y3)/2+state.s83), (double)((x4 - state.s22)),(double)((y3+(y4-y3)/4)+state.s3),state.s2,Color.white); MaestroG.drawLineThick(g,(double)((x4 - state.s21)),(double)((y4+y3)/2+state.s83), (double)((x4 - state.s21)),(double)((y3+(y4-y3)/4)+state.s3),state.s1,Color.pink); // current vector pointing up g.setColor(Color.red); MaestroG.drawArrowScaled((x4 - state.s20), (y4+y3)/2+state.s103, 1, 2*state.sfactor, g); MaestroG.drawLineThickA(g,(double)(x4 - state.s20), (double)((y4+y3)/2+state.s112), (double)(x4 - state.s20), (double)((y4+y3)/2+state.s100),state.s2,Color.red); // Semi-transparent 2D surface int rule; float alpha; rule = AlphaComposite.SRC_OVER; alpha = 0.9f; g2d.setComposite(AlphaComposite.getInstance(rule, alpha)); g2d.setStroke(new BasicStroke(state.s1)); Polygon xyplane = new Polygon(); xyplane.addPoint(x1, y1); xyplane.addPoint(x2, y2); xyplane.addPoint(x3,y3); xyplane.addPoint(x4,y4); //g.setColor(new Color(79,188,240)); g.setColor(new Color(199,208,250)); g.fillPolygon(xyplane); g.setColor(Color.gray); g.drawPolygon(xyplane); alpha = 1.0f; g2d.setComposite(AlphaComposite.getInstance(rule, alpha)); // y axis MaestroG.drawLineThickA(g,(double)((x1+x2)/2),(double)((y1+y2)/2), (double)((x4+x3)/2 + state.s20),(double)((y1+y2)/2),state.s0,Color.black); MaestroG.drawArrowScaled( (x4+x3)/2 + state.s18, (y1+y2)/2, 3, 1.5*state.sfactor, g); // x axis MaestroG.drawLineThickA(g,(double)((x2+x3)/2),(double)((y2+y3)/2), (double)((x4+x1)/2 - state.s8),(double)((y1+y4)/2+ state.s16),state.s0,Color.black); //draw oblique arrow head Polygon pM = new Polygon(); int x, y; double sf = state.sfactor; x = (x4+x1)/2 - state.s12; y = (y1+y4)/2+ state.s24; pM.addPoint(x,y); pM.addPoint(x+(int)(sf*3),y-(int)(sf*11)); pM.addPoint(x+(int)(sf*8),y-(int)(sf*9)); //g.drawPolygon(pM); g.fillPolygon(pM); // z axis MaestroG.drawLineThickA(g,(double)(((x4+x1)/2+(x2+x3)/2)/2),(double)((y4+y3)/2), (double)(((x4+x1)/2+(x2+x3)/2)/2),(double)((y3+y4)/2- state.s100),state.s0,Color.black); MaestroG.drawArrowScaled( ((x4+x1)/2+(x2+x3)/2)/2, (y3+y4)/2- state.s98, 1, 1.5*state.sfactor, g); //TOP PARTS OF WIRES //First wire MaestroG.drawLineThickA(g,(double)((x2 - state.s10)),(double)((y4+y3)/2-state.s80), (double)((x2 - state.s10)),(double)((y3+3*(y4-y3)/4)),th1,Color.red); // highlights MaestroG.drawLineThick(g,(double)((x2 - state.s12)),(double)((y4+y3)/2-state.s80), (double)((x2 - state.s12)),(double)((y3+3*(y4-y3)/4)+state.s3),state.s2,Color.white); MaestroG.drawLineThick(g,(double)((x2 - state.s11+1)),(double)((y4+y3)/2-state.s80), (double)((x2 - state.s11+1)),(double)((y3+3*(y4-y3)/4)+state.s3),state.s1,Color.pink); // current vector pointing down g.setColor(Color.red); MaestroG.drawArrowScaled( (x2 - state.s10), (y4+y3)/2-state.s103, 2, 2*state.sfactor, g); MaestroG.drawLineThickA(g,(double)(x2 - state.s10), (double)((y4+y3)/2-state.s98), (double)(x2 - state.s10), (double)((y4+y3)/2-state.s113),state.s2,Color.red); //Second wire MaestroG.drawLineThickA(g,(double)((x4 - state.s20)),(double)((y4+y3)/2-state.s100), (double)((x4 - state.s20)),(double)((y3+(y4-y3)/4)),th1,Color.red); // highlights MaestroG.drawLineThick(g,(double)((x4 - state.s22)),(double)((y4+y3)/2-state.s100), (double)((x4 - state.s22)),(double)((y3+(y4-y3)/4)+state.s3),state.s2,Color.white); MaestroG.drawLineThick(g,(double)((x4 - state.s21)),(double)((y4+y3)/2-state.s100), (double)((x4 - state.s21)),(double)((y3+(y4-y3)/4)+state.s3),state.s1,Color.pink); // current vector pointing up g.setColor(Color.red); MaestroG.drawArrowScaled((x4 - state.s20), (y4+y3)/2-state.s118, 1, 2*state.sfactor, g); MaestroG.drawLineThickA(g,(double)(x4 - state.s20), (double)((y4+y3)/2-state.s125), (double)(x4 - state.s20), (double)((y4+y3)/2-state.s110),state.s2,Color.red); g.setColor(Color.black); g.setFont(new Font("Serif",Font.PLAIN,state.font16)); g.drawString("Line", x1 - state.s2, (y4+y3)/2-state.s70); g.drawString("source 2", x1 - state.s2, (y4+y3)/2-state.s55); g.drawString("Line", x4 - state.s7, (y4+y3)/2-state.s90); g.drawString("source 1", x4 - state.s7, (y4+y3)/2-state.s75); g.drawString("x", (x4+x1)/2 - state.s19,(y1+y4)/2+ state.s35); g.drawString("y", (x4+x3)/2 + state.s34,(y1+y2)/2 +state.s2); g.drawString("z", ((x4+x1)/2+(x2+x3)/2)/2 +state.s6,(y3+y4)/2 - state.s105); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_OFF); } public void drawCopyRight(Graphics g) { int deltaY = state.s20; int startingY = getSize().height - state.s60; 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,state.font14)); fm = g.getFontMetrics(); startingY += deltaY; g.drawString(" Applet Design: Fawwaz Ulaby and Janice Richards", startingX,startingY+deltaY+state.s3); int lineLength = fm.stringWidth(" Applet Design: Fawwaz Ulaby and Janice Richards"); lineLength+= state.s10; //g.setFont(state.ttfFont.deriveFont(14f)); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); g.drawLine(startingX,startingY+state.s5, startingX+lineLength+10,startingY+state.s5); g.drawLine(startingX+lineLength+state.s10,startingY+state.s5, startingX+lineLength+state.s10,startingY+2*deltaY); } //---------------------------------------------------------------------------------------- }//End