/* @(#)TextFieldSample.java   27 September 2007 */

import edu.neu.ccs.*;
import edu.neu.ccs.gui.*;

import javax.swing.*;

public class TextFieldSample
    extends DisplayPanel
{
    /** The table panel gap. */
    protected int gap = 20;
    
    /** The text field view width. */
    protected int width =
        TextFieldView.getSampleWidth("0000000000000000000000");
    
    /** The text field view for x. */
    protected TextFieldView xTFV = new TextFieldView(width);
    
    /** The label for x. */
    protected Annotation xLabel = new Annotation("");
    
    /** The label for the square. */
    protected Annotation sLabel = new Annotation("");
    
    /** The label for the square root. */
    protected Annotation rLabel = new Annotation("");
    
    /** The label for the inverse. */
    protected Annotation iLabel = new Annotation("");
    
    
    /** The demand computation action. */
    protected SimpleAction demandAction =
        new SimpleAction("Demand Computation") {
            public void perform() { demand(); }
    };
    
    
    /** The request computation action. */
    protected SimpleAction requestAction =
        new SimpleAction("Request Computation") {
            public void perform() { request(); }
    };
    
    
    /** The constructor. */
    public TextFieldSample() {
        createGUI();
    }
    
    
    /** Create the GUI. */
    protected void createGUI() {
        // 2-dimension table of labels and text fields
        Object[][] stuff = {
            { "x",                new Halo(xTFV) },
            { "x",                xLabel },
            { "Square Of x",      sLabel },
            { "Square Root Of x", rLabel },
            { "Inverse Of x",     iLabel }
        };
        
        TablePanel panel =
            new TablePanel(stuff, gap, gap, WEST);
        
        // vertical table with 2-dimensional table and buttons
        Object[] mainStuff = { panel, demandAction, requestAction };
        
        VTable mainTable =
            new VTable(mainStuff, gap, gap, CENTER);
        
        // decorate
        mainTable.emptyBorder(gap);
        mainTable.setDeepBackground(Colors.white);
        mainTable.setDeepBackground(Colors.yellow, JButton.class);
        
        // add the main table to the enclosing GUI
        addObject(mainTable);
        
        // add the request action as the default action
        xTFV.addActionListener(requestAction);
    }
    
    
    /** The method to demand x for the computations. */
    protected void demand() {
        double x = xTFV.demandDouble();
        
        xLabel.setText("" + x);
        sLabel.setText("" + (x * x));
        rLabel.setText("" + (Math.sqrt(x)));
        iLabel.setText("" + (1 / x));
    }
    
    
    /** The method to request x for the computations. */
    protected void request() {
        try {
            double x = xTFV.requestDouble();
            
            xLabel.setText("" + x);
            sLabel.setText("" + (x * x));
            rLabel.setText("" + (Math.sqrt(x)));
            iLabel.setText("" + (1 / x));
        }
        catch (CancelledException ex) {
            xTFV.setText("");
            xLabel.setText("Cancelled");
            sLabel.setText("Cancelled");
            rLabel.setText("Cancelled");
            iLabel.setText("Cancelled");
        }
    }
    
    
    /** The main method. */
    public static void main(String[] args) {
        new TextFieldSample().frame("Text Field Sample");
    }
    
}