// Instructions.java 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 = Color.white; public TextField epsilon; private Paint paint; private Image im; private Graphics buf; Mod4State state; public Button closeIt; public Instructions(Mod4State state){ super(); this.state = state; setLayout(null); setBackground(bgcolor); closeIt = new Button("CLOSE"); closeIt.setBackground(new Color(240,240,255)); add(closeIt); //int buttonx = 380; //int buttony = 380; int buttonx = 410; int buttony = 440; int buttonwide = 70; int buttonheight = 27; 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); } 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.drawString("Instructions", 10,15); g.setColor(Color.red); g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); g.drawString("Input", 15,50); //g.drawString("Output", 230,50); g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(14f)); int deltaY = 20; //INPUT g.drawString("\u2022 Charges may be placed in either or both of the two"+ " adjoining dielectric half-planes", 15,70); g.drawString("\u2022 Use the sliders or entries in the display panel,"+ " to set the permittivities of the",15,70+deltaY); g.drawString(" two dielectrics",15,70+2*deltaY); g.drawString("\u2022 Use the slider or the entry, in the Input panel,"+ " to set a positive or negative value", 15,70+3*deltaY); g.drawString(" for a new charge to place in the display panel", 15,70+4*deltaY); g.drawString("\u2022 Use \"add charge\" and click in the"+ " display panel to put charge there", 15,70+5*deltaY); g.drawString("\u2022 Select a charge and click \"edit charge"+ " value\" to see the effects of the change", 15,70+6*deltaY); g.drawString("\u2022 Selected charges may also be deleted or"+ " dragged to a new location in the display panel", 15,70+7*deltaY); //OUTPUT g.setColor(Color.red); g.setFont(state.ttfFont.deriveFont(Font.BOLD,15f)); int newY = 70+9*deltaY+40; g.drawString("Outputs", 15,newY); g.setColor(Color.black); g.setFont(state.ttfFont.deriveFont(14f)); newY += 20; g.drawString("\u2022 Electric potential V(x,y) is shown in shades"+ " of blue (positive) and red (negative)", 15,newY); g.drawString("\u2022 Contour lines of constant potential"+ " are displayed in black",15,newY+deltaY); g.drawString("\u2022 Electric field vector directions are shown"+ " as dark orange arrows",15,newY+2*deltaY); g.drawString("\u2022 The cursor can also be used to echo the"+ " Potential and Electric Field values",15,newY+3*deltaY); g.drawString(" at that position",15,newY+4*deltaY); /* String s = "\u2022 Spatial pattern of electric field "+ STR.BOLD+"E"+STR.ENDBOLD+"(x,y)"; int nextX = STR.displayString(s,g,15,newY+2*deltaY); s = "\u2022 Values of V(x,y) and "+STR.BOLD+"E"+STR.ENDBOLD+ "(x,y) at any cursor location (x,y)"; nextX = STR.displayString(s,g,15,newY+3*deltaY); */ drawCopyRight(g); //MaestroG.useBiggerFont = saveOldFlag; } public void drawCopyRight(Graphics g) { int deltaY = 20; int startingY = getSize().height - 60; int startingX = 0; FontMetrics fm; g.setColor(Color.black); g.setColor(Color.black); //g.setFont(normalfont14); g.setFont(state.ttfFont.deriveFont(14f)); fm = g.getFontMetrics(); startingY += deltaY; g.drawString("Applet Design: Fawwaz Ulaby and Janice Richards", startingX,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,startingY+2*deltaY); //int lineLength = fm.stringWidth("Interactive JavaTM platform: www.amanogawa.com"); //lineLength+= 10; int lineLength = fm.stringWidth("Applet Design: Fawwaz Ulaby and Janice Richards"); lineLength+= 10; g.setFont(state.ttfFont.deriveFont(14f)); //g.drawString("All Rights Reserved",startingX,startingY+3*deltaY-5); g.drawLine(startingX,startingY+5, startingX+lineLength+10,startingY+5); //g.drawLine(startingX+lineLength+10,startingY+5, // startingX+lineLength+10,startingY+4*deltaY); g.drawLine(startingX+lineLength+10,startingY+5, startingX+lineLength+10,startingY+2*deltaY); } //---------------------------------------------------------------------------------------- }//End