public SISCFrame(AppContext ctx) {
setLayout(new BorderLayout());
SchemePanel.SchemeDocument d = new SchemePanel.SchemeDocument();
sp = new SchemePanel(ctx, d, new JTextPane(d));
input = new JTextArea(4, 70);
input.setText("; Enter s-expressions here");
JSplitPane split = new JSplitPane(JSplitPane.VERTICAL_SPLIT, sp, input);
JPanel execPanel = new JPanel();
execPanel.setLayout(new BoxLayout(execPanel, BoxLayout.X_AXIS));
execPanel.add(Box.createHorizontalGlue());
eval = new JButton("Evaluate");
clear = new JButton("Clear");
autoClear = new JCheckBox("Auto-Clear");
submitOnEnter = new JCheckBox("Evaluate on Enter");
autoClear.setSelected(true);
submitOnEnter.setSelected(true);
execPanel.add(submitOnEnter);
execPanel.add(autoClear);
execPanel.add(clear);
execPanel.add(eval);
add(split, BorderLayout.CENTER);
add(execPanel, BorderLayout.SOUTH);
eval.addActionListener(this);
clear.addActionListener(this);
input.addKeyListener(this);
/* addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});*/
}
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("Clear")) input.setText("");
else {
String s = input.getText().trim();
if (s.length() > 1 && s.charAt(s.length() - 1) == '\n') s = s.substring(0, s.length() - 1);
PushbackReader ip = new PushbackReader(new BufferedReader(new StringReader(s)));
Value v = Util.VOID;
try {
v = sp.dynenv.parser.nextExpression(ip);
} catch (EOFException eof) {
// eof.printStackTrace();
return;
} catch (Exception ie) {
System.err.println(ie);
}
if (autoClear.isSelected()) input.setText("");
sp.eval(s);
}
}