import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.util.Enumeration;
import java.util.Observer;
import java.util.Observable;
public class GUI extends Applet
{
 // Calculation engine
 Calc calc;
 // Status Panel components
 TextField statusField;
 Button cancelButton;
 // Context Panel components
 boolean ignore;
 Checkbox standardizationBox;
 TextField kField;
 // Main panel components
 ChuSource inputLeft, inputRight;
 ChuTarget output;
 // Operation Button Layout
 static String[] unaryButtonNames = {
 "ID", "_|_", "!", "?"
 };
 static String[] binaryButtonNames = {
 "+", "*", null, ";", "U", null, "&", "#", "-o", "=>"
 };
 
 // Bottom Panel modes
 static String[] modes = {"Script", "Edit"};
 static final int SCRIPT = 0;
 static final int EDIT = 1;
 // INIT: Builds all GUI components, and
 // sets up their layout and event handling 
 public void init() 
 {
 // First Build the calculator
 calc = new Calc();
 
 // Use bigger font for readability
 Font ourfont = new Font("Helvetica",Font.BOLD,14);
 setFont(ourfont);
 // Status Panel
 Panel statusPanel = new Panel();
 statusField = new TextField(50);
 statusField.setEditable(false);
 statusPanel.add(new Label("Status"));
 statusPanel.add(statusField);
 cancelButton = new Button("CANCEL");
 cancelButton.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e)
 {
 try {
 calc.cancel();
 }
 catch(ExecutionException x) {
 statusField.setText(x.getMessage());
 }
 }
 });
 statusPanel.add(cancelButton);
 calc.addObserver(new Observer() {
 public void update(Observable o, Object arg) 
 {
 switch(calc.eventCode) {
 case Calc.BEGIN:
 if(arg==null)
 statusField.setText("Executing script");
 else
 statusField.setText("Executing " + (String)arg);
 break;
 case Calc.END:
 statusField.setText("Done");
 break;
 case Calc.FAIL:
 statusField.setText((String)arg);
 break;
 }
 }
 });
 // Context panel
 Panel contextPanel = new Panel();
 ignore = true;
 standardizationBox = new Checkbox("Unique");
 standardizationBox.setState(true);
 standardizationBox.addItemListener( new ItemListener() {
 public void itemStateChanged(ItemEvent e)
 {
 if(ignore) return;
 try {
 calc.calculate((standardizationBox.getState() ? "Unique" : "Multi"), 
 true);
 }
 catch(ExecutionException x) {
 calc.broadcast(Calc.FAIL, x.getMessage());
 }
 }
 });
 contextPanel.add(standardizationBox);
	
 kField = new TextField("2");
 kField.setEditable(true);
 kField.addActionListener( new ActionListener() {
 public void actionPerformed(ActionEvent e)
 {
 if(ignore) return;
 int newK;
 String kText = kField.getText();
 try {
 newK = Integer.parseInt(kText);
 calc.calculate(Integer.toString(newK), true); 
 }
 catch(NumberFormatException x) {
 calc.broadcast(Calc.FAIL, "can't parse K='"+kText+"'");
 }
 catch(ExecutionException x) {
 calc.broadcast(Calc.FAIL, x.getMessage());
 }
 }
 });
 contextPanel.add(new Label("K"));
 contextPanel.add(kField);
 ignore = false;
 calc.addObserver(new Observer() {
 public void update(Observable o, Object arg) 
 {
 switch(calc.eventCode) {
 case Calc.BEGIN:
 break;
 case Calc.END: // Fall through
 case Calc.FAIL: 
 ignore = true;
 
 Context context = calc.getContext();
 
 boolean std = context.standardization;
 standardizationBox.setState(std);
 standardizationBox.setLabel(std ? "Unique" : "Multi");
 
 kField.setText(Integer.toString(context.k));
 ignore = false;
 }
 }
 });
 
 // Operation button panels
 Panel unaryOperButtonPanel = new Panel(new GridBagLayout());
 for(int i=0; i<unarybuttonnames.length; ++i)
 {
 String name = unaryButtonNames[i];
 Component c;
 if(name == null) {
 c = new Label("");
 }
 else {
 Button b = new Button(name);
 b.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) 
 {
 try {
 String statementText = output.getIdentifier()+
 "="+ 
 e.getActionCommand()+
 " "+
 inputLeft.getIdentifier();
 calc.calculate(statementText,true);
 }
 catch(ExecutionException x) {
 statusField.setText(x.getMessage());
 }
 }
 });
 c = b;
 }
 Layout.addComponent(unaryOperButtonPanel, c,
 0, i, 1, 1);
 }
 Panel binaryOperButtonPanel = new Panel(new GridBagLayout());
 for(int i=0; i<binarybuttonnames.length; ++i)
 { 
 String name = binaryButtonNames[i];
 Component c;
 if(name==null) {
 c = new Label("");
 }
 else {
 Button b = new Button(name);
 b.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) 
 {
 try {
 String statementText = output.getIdentifier()+
 "="+ 
 inputLeft.getIdentifier()+
 " "+
 e.getActionCommand()+
 " "+
 inputRight.getIdentifier();
 calc.calculate(statementText,true);
 }
 catch(ExecutionException x) {
 statusField.setText(x.getMessage());
 }
 }
 });
 c = b;
 }
 Layout.addComponent(binaryOperButtonPanel, c,
 0, i, 1, 1);
 }
 // Main panel 
 Panel mainPanel = new Panel(new GridBagLayout());
 Layout.addComponent(mainPanel, unaryOperButtonPanel,
 0, 0, 1, 8);
 inputLeft = new ChuSource(calc);
 Layout.addComponent(mainPanel, inputLeft,
 1, 0, 2, 8);
 Layout.addComponent(mainPanel, binaryOperButtonPanel,
 3, 1, 1, 8);
 inputRight = new ChuSource(calc);
 Layout.addComponent(mainPanel, inputRight,
 4, 0, 2, 8);
 
 output = new ChuTarget(calc);
 Layout.addComponent(mainPanel, output,
 6, 0, 2, 8);
 // Card Panel
 final CardLayout cardLayout = new CardLayout();
 final Panel cardPanel = new Panel(cardLayout);
 cardPanel.add(new ScriptPanel(calc), modes[SCRIPT]);
 cardPanel.add(new ChuEdit(calc), modes[EDIT]);
 
 // CheckboxPanel
 Panel checkboxPanel = new Panel(new GridLayout(modes.length, 1));
 final CheckboxGroup cbg = new CheckboxGroup();
 Checkbox[] cba = new Checkbox[modes.length]; 
 for(int i=0;i<modes.length;i++) {
 cba[i] = new Checkbox(modes[i],false,cbg);
 checkboxPanel.add(cba[i]);
 cba[i].addItemListener( new ItemListener() {
 public void itemStateChanged(ItemEvent e)
 {
 cardLayout.show(cardPanel, cbg.getSelectedCheckbox().getLabel());
 }
 });
 }
 cbg.setSelectedCheckbox(cba[SCRIPT]);
 // BottomPanel
 Panel bottomPanel = new Panel();
 bottomPanel.add(checkboxPanel); 
 bottomPanel.add(cardPanel);
 // Whole Applet
 this.setLayout(new GridBagLayout());
 Layout.addComponent(this, statusPanel,
 0, 0, 1, 1);
 Layout.addComponent(this, contextPanel,
 0, 1, 1, 1);
 Layout.addComponent(this, mainPanel,
 0, 2, 1, 1);
 Layout.addComponent(this, bottomPanel,
 0, 3, 1, 1);
 }
}
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="http://chu.stanford.edu/source/GUI.java">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="http://chu.stanford.edu/source/GUI.java" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>