// 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(255,255,250); public TextField epsilon; private Paint paint; private Image im; private Graphics buf; public Button bupdate; NewGuide_State state; private BufferedImage square_root; public Instructions(NewGuide_State state){ super(); this.state = state; getImages(); setLayout(null); setBackground(bgcolor); // update button bupdate = new Button("CLOSE"); bupdate.setBackground(new Color(240,240,255)); bupdate.setFont(state.ttfFont.deriveFont(Font.PLAIN,(float)state.font12)); add(bupdate); int buttonx = state.s450; int buttony = state.s230; 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() { System.out.printf("state.sfactor is %f!%n", state.sfactor); // read in character images that CHEERPJ will not render // (java to javascript converter) double font14_factor = 14.0 * state.sfactor; //System.out.printf("font factor: %f%n",font14_factor); long fontsize = Math.round(font14_factor); if (fontsize > 30) fontsize = 30; else if (fontsize < 14) fontsize = 14; //System.out.printf("effective fontsize: %d%n",fontsize); String filename = "square_root_"+String.valueOf(fontsize)+".png"; //System.out.printf("filnam: %s%n",filename); try { square_root = ImageIO.read(getClass().getResource(filename)); } 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(); g.setColor(Color.black); g.drawRect(0,0,getSize().width-1,getSize().height-1); boolean saveOldFlag = MaestroG.useBiggerFont; MaestroG.useBiggerFont = false; g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(Font.BOLD,(float)state.font16)); g.drawString("Instructions", state.s20,state.s25); g.setColor(Color.red); g.setFont(state.ttfFont.deriveFont(Font.BOLD,(float)state.font15)); g.drawString("Input", state.s25,state.s50); g.drawString("Displayed Information", state.s325,state.s50); g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont((float)state.font14)); int deltaY = state.s20; //INPUT g.drawString("d = wire diameter", state.s25,state.s80); g.drawString("D = distance between wires' centers", state.s25,state.s80+deltaY); MaestroG.subscripter("\u03b5","r"," = relative permittivity of substrate", g,state.font14,state.s25,state.s80+2*deltaY); g.drawString("\u03c3 = conductivity of substrate",state.s25,state.s80+3*deltaY); MaestroG.subscripter("\u03c3","c"," = conductivity of wire material", g,state.font14,state.s25,state.s80+4*deltaY); MaestroG.subscripter("\u03bc = \u03bc","0"," for both substrate and wires", g,state.font14,state.s25,state.s80+5*deltaY); //OUTPUT g.drawString("Line Parameters C\u00b4, L\u00b4, R\u00b4, G\u00b4", state.s325,state.s80); MaestroG.subscripter("Z","0"," = characteristic impedance", g,state.font14,state.s325,state.s80+deltaY); g.drawString("\u03b1 = attenuation constant",state.s325,state.s80+2*deltaY); g.drawString("\u03b2 = wave number",state.s325,state.s80+3*deltaY); // \u221A is the square root symbol FontMetrics fmNormal,fmSub; g.setFont(state.ttfFont.deriveFont((float)state.font14)); fmNormal = g.getFontMetrics(); g.setFont(state.ttfFont.deriveFont((float)state.font12)); fmSub = g.getFontMetrics(); int len1,len2; //len1 = fmNormal.stringWidth("\u03bb = \u03bb" + "/\u221A"); // CHEERPJ doesn't print \u221A square root symbol, 10 is width // of new square_root image: len1 = fmNormal.stringWidth("\u03bb = \u03bb" + " / ") + square_root.getWidth(); len1 += fmSub.stringWidth("0"); len2 = fmNormal.stringWidth("\u03b5"); len2 += fmSub.stringWidth("r"); //dblsubscriptor("\u03bb = \u03bb","0","/\u221A\u03b5","r","", // g,325,80+4*deltaY); //MaestroG.subscripter("\u03bb = \u03bb","0","/\u221A", // g,state.font14,state.s325,state.s80+4*deltaY); MaestroG.SubTxtTxtImg("\u03bb = \u03bb","0"," / ",square_root, g,state.font14,state.s325,state.s80+4*deltaY,this); MaestroG.subscripter("\u03b5","r","", g,state.font14,state.s327+len1,state.s80+4*deltaY); g.drawLine(state.s325+len1,state.s66+4*deltaY, state.s325+len1+len2,state.s66+4*deltaY); 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(normalfont14); g.setFont(state.ttfFont.deriveFont((float)state.font14)); fm = g.getFontMetrics(); g.drawString("Application Design: Umberto Ravaioli", startingX+state.s15,startingY+deltaY); MaestroG.superscripter("Interactive Java","TM"," platform: www.amanogawa.com", g,state.font14,startingX+state.s15,startingY+2*deltaY); int lineLength = fm.stringWidth("Interactive JavaTM platform: www.amanogawa.com"); lineLength += state.s10; g.setFont(state.ttfFont.deriveFont((float)state.font14)); 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