/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

/*
 * CelsiusConverterGUI.java
 *
 */

package piCalc;

import java.awt.event.ActionEvent;

public class piCalc2 extends javax.swing.JFrame {
    
    /** Creates new form CelsiusConverterGUI */
    public piCalc2() {
        initComponents();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
    

private void initComponents() {
	tempTextField = new javax.swing.JTextField();

        limitLabel = new javax.swing.JLabel();

        toggleButton = new javax.swing.JButton();
        
        resetButton = new javax.swing.JButton();

        nLabel = new javax.swing.JLabel();
        
        piLabel = new javax.swing.JLabel();


        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        setTitle("Pi Calculator");

        limitLabel.setText("Limit of n?");
        nLabel.setText("n = 0");
        piLabel.setText("π = 4");
        
        toggleButton.setText("Start");
        resetButton.setText("Reset");

        toggleButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                togglePi(evt);
            }
        });
        
        resetButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                reset(evt);
            }
        });


        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
		layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()  
			.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
			.addGroup(layout.createSequentialGroup()
						.addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(limitLabel))
		.addGroup(layout.createSequentialGroup()
                        .addComponent(toggleButton)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(nLabel)
                        .addContainerGap(100, Short.MAX_VALUE)))
        .addGroup(layout.createSequentialGroup()             
        		.addComponent(resetButton))
        .addGroup(layout.createSequentialGroup()             
        		.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)        	
        		.addComponent(piLabel))
        
        .addContainerGap(200, Short.MAX_VALUE))
        );



        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {toggleButton, tempTextField});


        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

            .addGroup(layout.createSequentialGroup()

                .addContainerGap()

                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

                    .addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)

                    .addComponent(limitLabel))

                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

                    .addComponent(toggleButton)

                    .addComponent(nLabel)
                    .addComponent(piLabel))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                   .addComponent(resetButton))

                    .addContainerGap(100, Short.MAX_VALUE))

        );

        pack();

    }
// </editor-fold>//GEN-END:initComponents

/*    
private void convertButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_convertButtonActionPerformed

//Parse degrees Celsius as a double and convert to Fahrenheit

        int tempFahr = (int)((Double.parseDouble(tempTextField.getText()))
            * 1.8 + 32);

        fahrenheitLabel.setText(tempFahr + " Fahrenheit");

    }
*/

private void togglePi(ActionEvent evt) {
	checkPlay();
}

public void checkPlay(){
	System.out.println(play);
	if(play == 0) {
		play = 1;
		calcPi();
		System.out.println("calc");
		toggleButton.setText("Calculating...");
	}
	else {
		System.out.println("pausing...");
		play = 0;
		toggleButton.setText("Paused");
	}
}

private void calcPi() {
	if (tempTextField.getText().length() != 0) {
		nLimit =  (int)(Double.parseDouble(tempTextField.getText()));
		recurse = true;
	}
	else {
		nLimit = 1000000000;	
		recurse = false;
	}
		
	/*
	int nLimit = (int)(Double.parseDouble(tempTextField.getText()));
	if(nLimit == null)
		System.out.println('null');
	*/
	/*if (play == 1 && n < nLimit) {
		sum += (Math.pow(-1, n)* 4)/(2*n+1);
		n++;
		nLabel.setText("n = "+n);
		piLabel.setText("π = "+sum);
		/*if(recurse) {
			calcPi();
		}
	}
	*/
	while (n < nLimit) {
		sum += (Math.pow(-1, n)* 4)/(2*n+1);
		n += 1;
		nLabel.setText("n = "+n);
		piLabel.setText("π = "+sum);
		System.out.println(n+"    "+sum);
	}
	checkPlay();

}



public void reset(ActionEvent evt) {
	n = 0;
	sum = 0;
	nLabel.setText("n = "+n);
	piLabel.setText("π = "+sum);
	toggleButton.setText("Start");
}
//GEN-LAST:event_convertButtonActionPerformed

    
    /**
     * @param args the command line arguments
     */

    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {

                new piCalc2().setVisible(true);

            }

        });

    }
    
    
// Variables declaration - do not modify//GEN-BEGIN:variables

    private javax.swing.JLabel limitLabel;

    private javax.swing.JButton toggleButton;
    
    private javax.swing.JButton resetButton;

    private javax.swing.JLabel nLabel;
    
    private javax.swing.JLabel piLabel;

    private javax.swing.JTextField tempTextField;
    
    
    int play = 0;
    int n = 0;
    double sum = 0;
    int nLimit = 10000;
    boolean recurse;
    
    // End of variables declaration//GEN-END:variables
    

}