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 = Color.white; public TextField epsilon; private Paint paint; private Image im; private Graphics buf; public Button bupdate; Trans_State state; private BufferedImage bullet; public Instructions(Trans_State state){ super(); this.state = state; setLayout(null); getImages(); setBackground(bgcolor); bupdate = new Button("CLOSE"); bupdate.setFont(new Font("SanSerif",Font.PLAIN,state.font12)); bupdate.setBackground(new Color(255,255,255)); add(bupdate); int buttonx = state.s500; int buttony = state.s400+state.s55; 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); int startx = state.s20; int starty = state.s90; g.setColor(Color.black); //g.drawRect(0,0,getSize().width-1,getSize().height-1); g.setFont(new Font("SanSerif",Font.BOLD,state.font18)); g.drawString("Instructions", startx,state.s40); int nextX; g.setColor(Color.red); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); g.drawString("Input", startx,starty); g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); fm = g.getFontMetrics(); int deltaY = state.s25; //INPUT //String s = "\u2022 Plot Range: The spatial dimension (in units of \u03bb)"+ // " of the display plane"; //nextX = STR.displayString(s,g,startx,starty+2*deltaY); g.drawImage(bullet,startx,starty+2*deltaY-bullet.getHeight(),this); String s = " Plot Range: The spatial dimension (in units of \u03bb)"+ " of the display plane"; nextX = STR.displayString(s,g,startx+bullet.getWidth(),starty+2*deltaY); //s = "\u2022 Choice of Horizontal (x-y) or Vertical Plane"; //nextX = STR.displayString(s,g,startx,starty+3*deltaY); g.drawImage(bullet,startx,starty+3*deltaY-bullet.getHeight(),this); s = " Choice of Horizontal (x-y) or Vertical Plane"; nextX = STR.displayString(s,g,startx+bullet.getWidth(),starty+3*deltaY); //s = "\u2022 Choice of E"+STR.SUB+"\u03b8"+STR.ENDSUB+" (exact "+ // "solution) or E"+STR.SUB+"\u03b8FF"+STR.ENDSUB+ // " (far-field approximation)"; //nextX = STR.displayString(s,g,startx,starty+4*deltaY); g.drawImage(bullet,startx,starty+4*deltaY-bullet.getHeight(),this); s = " Choice of E"+STR.SUB+"\u03b8"+STR.ENDSUB+" (exact "+ "solution) or E"+STR.SUB+"\u03b8FF"+STR.ENDSUB+ " (far-field approximation)"; nextX = STR.displayString(s,g,startx+bullet.getWidth(),starty+4*deltaY); //OUTPUT g.setColor(Color.red); g.setFont(new Font("SanSerif",Font.BOLD,state.font15)); int newY = starty+7*deltaY; g.drawString("Displayed Information", startx,newY); g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.font14)); newY += state.s40; //s = "\u2022 2-D patterns of E\u03b8"+STR.SUB+"\u03b8"+STR.ENDSUB+ // " and H"+STR.SUB+"\u03c6"+STR.ENDSUB+", in the Horizontal"+ // " and Vertical planes"; //nextX = STR.displayString(s,g,startx,newY); g.drawImage(bullet,startx,newY-bullet.getHeight(),this); s = " 2-D patterns of E"+STR.SUB+"\u03b8"+STR.ENDSUB+ " and H"+STR.SUB+"\u03c6"+STR.ENDSUB+", in the Horizontal"+ " and Vertical planes"; nextX = STR.displayString(s,g,startx+bullet.getWidth(),newY); //s = "\u2022 Dynamic simulation of how E"+STR.SUB+"\u03b8"+STR.ENDSUB+ // ", H"+STR.SUB+"\u03c6"+STR.ENDSUB+", and the current I(t), "+ // "vary with time"; //nextX = STR.displayString(s,g,startx,newY+deltaY); g.drawImage(bullet,startx,newY+deltaY-bullet.getHeight(),this); s = " Dynamic simulation of how E"+STR.SUB+"\u03b8"+STR.ENDSUB+ ", H"+STR.SUB+"\u03c6"+STR.ENDSUB+", and the current I(t), "+ "vary with time"; nextX = STR.displayString(s,g,startx+bullet.getWidth(),newY+deltaY); drawCopyRight(g); } public void drawCopyRight(Graphics g) { int deltaY = state.s20; int startingY = getSize().height - state.s75; int startingX = 0; FontMetrics fm; g.setColor(Color.black); g.setFont(new Font("SanSerif",Font.PLAIN,state.font13)); fm = g.getFontMetrics(); g.drawString("Applet Design: Umberto Ravaioli",startingX+state.s15,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+state.s5,startingX+state.s15+lineLength+state.s10,startingY+state.s5); g.drawLine(startingX+state.s15+lineLength+state.s10,startingY+state.s5, startingX+state.s15+lineLength+state.s10,startingY+4*deltaY); } //---------------------------------------------------------------------------------------- }//End