import java.lang.*; import java.awt.*; import java.applet.*; /* * Purpose: The main program of the applet */ public class InsertionSort extends Applet { public void init() { setLayout(new BorderLayout()); ITextPanel WritingArea = new ITextPanel(); ISortPanel DrawingArea = new ISortPanel(); IMainPanel MainArea = new IMainPanel(DrawingArea, WritingArea); add("Center", MainArea); add("North", new IControlPanel(MainArea, this)); } } /* * Purpose: The container panel for the whole applet */ class IMainPanel extends Panel { public ISortPanel panel1; public ITextPanel panel2; public IMainPanel(ISortPanel p, ITextPanel t) { panel1 = p; panel2 = t; setLayout(new GridLayout(2, 1)); /* 2 rows, 1 column */ add(p); add(t); } } /* End Class IMainPanel */ /* * Purpose: Drawing the text description */ class ITextPanel extends Panel { private int TOPMARGIN=50; private int LEFTMARGIN=30; public boolean AnimationNext[] = new boolean[15]; public int NextStep=0; private Font f; private String Description[][] = new String[15][5]; public ITextPanel() { setBackground(new Color(255, 248, 220)); /* set background as cornsilk */ f = new Font("Helvetica", Font.PLAIN, 16); Description[0][0] = "The leftmost value (3) can be said to be sorted in"; Description[0][1] = "relation to itself. Thus, we don't need to do any-"; Description[0][2] = "thing."; Description[0][3] = ""; Description[0][4] = ""; AnimationNext[0] = false; Description[1][0] = "Check to see if the second value (10) is smaller"; Description[1][1] = "than the first one (3). If it is so, we swap these"; Description[1][2] = "two values. But this time we don't need to swap."; Description[1][3] = ""; Description[1][4] = ""; AnimationNext[1] = false; Description[2][0] = "The blue portion (the first two values) are now"; Description[2][1] = "relatively sorted."; Description[2][2] = ""; Description[2][3] = ""; Description[2][4] = ""; AnimationNext[3] = false; Description[3][0] = "Next, we need to insert the third value (4) into the"; Description[3][1] = "blue portion so that after insertion, the blue portion"; Description[3][2] = "will still be relatively sorted."; Description[3][3] = ""; Description[3][4] = ""; AnimationNext[3] = false; Description[4][0] = "Remove the third value first."; Description[4][1] = ""; Description[4][2] = ""; Description[4][3] = ""; Description[4][4] = ""; AnimationNext[4] = true; Description[5][0] = "Slide the second value (10) over to make room for."; Description[5][1] = "insertion."; Description[5][2] = ""; Description[5][3] = ""; Description[5][4] = ""; AnimationNext[5] = true; Description[6][0] = "Insert the value 4 into appropriate position."; Description[6][1] = ""; Description[6][2] = ""; Description[6][3] = ""; Description[6][4] = ""; AnimationNext[6] = true; Description[7][0] = "Now the first three values are relatively sorted"; Description[7][1] = "and we insert the fourth value into these three"; Description[7][2] = "values. The first four values should be relatively"; Description[7][3] = "sorted after insertion."; Description[7][4] = ""; AnimationNext[7] = true; Description[8][0] = "Repeat the process until the last value is inserted."; Description[8][1] = ""; Description[8][2] = ""; Description[8][3] = ""; Description[8][4] = ""; AnimationNext[8] = true; Description[9][0] = "The whole array is sorted now."; Description[9][1] = ""; Description[9][2] = ""; Description[9][3] = ""; Description[9][4] = ""; AnimationNext[9] = true; } public void paint(Graphics g) { g.drawRect(0, 0, size().width-1, size().height-1); g.setFont(f); for (int i=0; i<5; i++) { g.drawString(Description[NextStep][i], LEFTMARGIN, TOPMARGIN+18*i); } } /* * Purpose: executed when the next button is pushed */ public void Next() { NextStep++; repaint(); } /* * Purpose: reset this panel to the begining situation */ public void reset() { NextStep=0; repaint(); } } /* End Class ITextPanel */ /* * Purpose: the control panel */ class IControlPanel extends Panel { IMainPanel MainArea; Button b1, b2, b3, bsound; Checkbox cb_sound; Applet applet; boolean voice = false; AudioClip ac=null; String sound[] = new String[10]; public IControlPanel(IMainPanel m, Applet app) { MainArea = m; applet = app; sound[0] = "sound/insert1.au"; sound[1] = "sound/insert2.au"; sound[2] = "sound/insert3.au"; sound[3] = "sound/insert4.au"; sound[4] = "sound/insert5.au"; sound[5] = "sound/insert6.au"; sound[6] = "sound/insert7.au"; sound[7] = "sound/insert8.au"; sound[8] = "sound/insert9.au"; sound[9] = "sound/insert10.au"; setLayout(new FlowLayout(FlowLayout.LEFT)); setBackground(Color.lightGray); b1 = new Button("Start Animation"); b2 = new Button(" Next "); reset(); add(b1); add(b2); cb_sound = new Checkbox("Voice Description"); cb_sound.setState(false); add(cb_sound); } /* End Method IControlPanel() */ /* * build in function to control events */ public boolean action(Event e, Object arg) { if (e.target instanceof Button) { String str = ((Button)(e.target)).getLabel(); if (str.equals("Start Animation")) { b1.disable(); cb_sound.disable(); MainArea.panel1.Next(); cb_sound.enable(); b2.enable(); } else if (str.equals(" Next ")) { b2.disable(); MainArea.panel2.Next(); if (voice) { /* applet.play(applet.getCodeBase(), sound[MainArea.panel2.NextStep]); */ if (ac != null) ac.stop(); ac = applet.getAudioClip(applet.getCodeBase(), sound[MainArea.panel2.NextStep]); ac.play(); } if (MainArea.panel2.NextStep <= 3) MainArea.panel1.Next(); if (MainArea.panel2.AnimationNext[MainArea.panel2.NextStep]) { if (MainArea.panel2.NextStep < 9) b1.enable(); else { b2.setLabel("Restart"); b2.enable(); } } else { b2.enable(); } } else if (str.equals("Restart")) { MainArea.panel1.reset(); MainArea.panel2.reset(); b2.setLabel(" Next "); reset(); } else if (str.equals("Voice Description")) { System.out.println(applet.getCodeBase()); applet.play(applet.getCodeBase(), sound[MainArea.panel2.NextStep]); } else if (str.equals("Disable Voice")) { voice = false; bsound.setLabel("Enable Voice"); } else if (str.equals("Enable Voice")) { voice = true; bsound.setLabel("Disable Voice"); applet.play(applet.getCodeBase(), sound[MainArea.panel2.NextStep]); } } else if (e.target instanceof Checkbox) { Checkbox cb = (Checkbox)e.target; String str = cb.getLabel(); if (str.equals("Voice Description")) { if (cb.getState()) { voice = true; /* applet.play(applet.getCodeBase(), sound[MainArea.panel2.NextStep]); */ if (ac != null) ac.stop(); ac = applet.getAudioClip(applet.getCodeBase(), sound[MainArea.panel2.NextStep]); ac.play(); } else { voice = false; ac.stop(); } } } return true; } /* End Method action() */ /* * Purpose: reset this panel to the initial situation */ public void reset() { b1.disable(); b2.enable(); } }