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package jfractionlab.exerciseDialogs;
import org.debian.tablelayout.TableLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import jfractionlab.FractionMaker;
import jfractionlab.HelpStarter;
import jfractionlab.JFractionLab;
import jfractionlab.MyJTextField;
import jfractionlab.displays.FractionAsRectangle;
import jfractionlab.displays.FractionLine;
import jfractionlab.jflDialogs.UsabilityDialog;
import jfractionlab.jflDialogs.WannaReduceQuestion;
public class DecimalToFraction extends ExerciseDialog implements
ActionListener, KeyListener {
static final long serialVersionUID = JFractionLab.serialVersionUID;
// GUI
private JLabel lb_instruction = new JLabel("", JLabel.CENTER);
private MyJTextField tf_numerator_1 = new MyJTextField(3);
private MyJTextField tf_denominator_1 = new MyJTextField(3);
private MyJTextField tf_numerator_2 = new MyJTextField(3);
private MyJTextField tf_denominator_2 = new MyJTextField(3);
private MyJTextField tf_decimal = new MyJTextField(3);
FractionAsRectangle pizza1 = new FractionAsRectangle();
FractionAsRectangle pizza2 = new FractionAsRectangle();
private FractionMaker fraction = new FractionMaker();
private double decimal;
private int numerator_1;
private int denominator_1;
private int numerator_2;
private int denominator_2;
/**
*
* @param owner
* @param lx
* @param ly
* @param sx
* @param sy
* @throws HeadlessException
*/
public DecimalToFraction(JFractionLab owner, int lx, int ly, int sx, int sy)
throws HeadlessException {
super(lx, ly, sx, sy);
setTitle(lang.Messages.getString("decimal_to_fraction"));
btn_continue = new JButton(lang.Messages.getString("continue"));
btn_end = new JButton(lang.Messages.getString("end"));
this.owner = owner;
// Menu
rb_random.addActionListener(this);
jmOptions.add(rb_random);
rb_custom.addActionListener(this);
jmOptions.add(rb_custom);
jmOptions.addSeparator();
rb_no_reducing.addActionListener(this);
jmOptions.add(rb_no_reducing);
rb_reducing.addActionListener(this);
jmOptions.add(rb_reducing);
jmb.add(jmOptions);
jmiHelp.addActionListener(this);
jmb.add(jmHelp);
setJMenuBar(jmb);
//
double sizes[][] = { {
// Spalten
5, // 00
TableLayout.FILL, // 01:
TableLayout.FILL, // 02:
TableLayout.FILL, // 03:
20, // 04: equal
TableLayout.FILL, // 05:
TableLayout.FILL, // 06:
TableLayout.FILL, // 07
20, // 08: equal
TableLayout.FILL, // 09
TableLayout.FILL, // 10:
TableLayout.FILL, // 11: space
TableLayout.FILL, // 12: buttons
5 // 13
}, {
// Zeilen
5, // 00
TableLayout.FILL, // 01: instructionlabel
0.1, // 02: numerator
15, // 03: fractionbar
0.1, // 04: denominator
0.25, // 05: first pizza
10, // 06
0.25, // 07: second pizza
TableLayout.FILL, // 08: infolabel
5 // 09
} };
Container content = getContentPane();
content.setLayout(new TableLayout(sizes));
content.setBackground(Color.white);
lb_instruction.setFont(JFractionLab.infofont);
content.add(lb_instruction, "1,1,9,1");
// decimal
addTextField(tf_decimal);
tf_decimal.addKeyListener(this);
content.add(tf_decimal, "2,2,2,4,c,c");
// equal
JLabel lb_equal1 = new JLabel("", JLabel.CENTER);
lb_equal1.setFont(JFractionLab.infofont);
lb_equal1.setText("=");
content.add(lb_equal1, "4,3");
// first fraction
addTextField(tf_numerator_1);
tf_numerator_1.addKeyListener(this);
content.add(tf_numerator_1, "6,2,c,b");
content.add(new FractionLine(), "6,3");
addTextField(tf_denominator_1);
content.add(tf_denominator_1, "6,4,c,t");
// equal
JLabel lb_equal2 = new JLabel("", JLabel.CENTER);
lb_equal2.setFont(JFractionLab.infofont);
lb_equal2.setText("=");
content.add(lb_equal2, "8,3");
// second fraction
addTextField(tf_numerator_2);
tf_numerator_2.addKeyListener(this);
content.add(tf_numerator_2, "10,2,c,b");
content.add(new FractionLine(), "10,3");
addTextField(tf_denominator_2);
tf_denominator_2.addKeyListener(this);
content.add(tf_denominator_2, "10,4,c,t");
// first pizza
content.add(pizza1, "1,5,9,5");
// second pizza
content.add(pizza2, "1,7,9,7");
// infolabel
lb_info.setFont(JFractionLab.infofont);
lb_info.setText(lang.Messages.getString("you_just_need_nb_and_enter"));
content.add(lb_info, "1,8,9,8");
// Buttons
btn_continue.addKeyListener(this);
btn_continue.addActionListener(this);
content.add(btn_continue, "12,2,f,b");
btn_end.addActionListener(this);
content.add(btn_end, "12,4,f,t");
points = owner.points_decimalToFraction;
pdsp.setText(String.valueOf(points));
content.add(pdsp, "12,5,12,7,c,c");
makeProblem();
String[] ar_howto = { "howto_nb_and_enter",
"howto_option_type_of_exercise" };
new UsabilityDialog(ar_howto);
}// Konstruktor
/**
*
*
*/
protected void makeProblem() {
// System.out.println("makeProblem");
if (smallNumbers){
// decimal = fraction.mkEasyDecimalFraction(true);
decimal = fraction.mkDecimalFraction(true);
}else{
decimal = fraction.mkDecimalFraction(false);
}
denominator_1 = calculateDenominator1(decimal);
numerator_1 = calculateNumerator1(decimal);
DecimalFormat df = new DecimalFormat();
tf_decimal.setText(df.format((decimal)));
tf_denominator_1.setText(String.valueOf(denominator_1));
pizza1.drawEmptyPizzaAsRectangle(denominator_1, false, false);
pizza2.noPizzaAsRectangle();
tf_numerator_1.setEditable(true);
tf_numerator_1.requestFocusInWindow();
}
private int calculateDenominator1(double decimal) {
BigDecimal bigd = new BigDecimal(Double.toString(decimal)).setScale(2, RoundingMode.HALF_EVEN);
BigDecimal b100 = new BigDecimal("100");
BigDecimal b10 = new BigDecimal("10");
BigDecimal b0 = new BigDecimal("0");
BigDecimal product = bigd.multiply(b100).setScale(2);
if (product.remainder(b10).compareTo(b0) == 0){
denominator_1 = 10;
return 10;
} else {
denominator_1 = 100;
return 100;
}
}
private int calculateNumerator1(double decimal) {
BigDecimal bigd = new BigDecimal(Double.toString(decimal)).setScale(2, RoundingMode.HALF_EVEN);
BigDecimal bigDenominator = new BigDecimal(denominator_1);
BigDecimal bigNumerator = bigd.multiply(bigDenominator);
numerator_1 = bigNumerator.intValueExact();
return bigNumerator.intValueExact();
}
/**
*
*
*/
protected void nextProblem() {
clearTextFields();
lb_info.setText("");
if (bl_randomProblem == true) {
makeProblem();
} else {
pizza1.noPizzaAsRectangle();
pizza2.noPizzaAsRectangle();
tf_decimal.setText("");
tf_decimal.setEditable(true);
tf_decimal.requestFocusInWindow();
}
}
/**
*
*/
public void actionPerformed(ActionEvent e) {
Object obj = e.getSource();
if (obj == btn_continue) {
nextProblem();
} else if (obj == btn_end) {
close_it();
} else if (obj == jmiHelp) {
new HelpStarter(lang.Messages.getLocale().toString(), "decimal");
} else if (obj == rb_random) {
// System.out.println("rb_random");
// the program is in "custom-mode" actually
// it should switch to "random-mode"
bl_randomProblem = true;
nextProblem();
} else if (obj == rb_custom) {
// System.out.println("rb_custom");
// the program is in "random-mode" actually
// it should switch to "custom-mode"
bl_randomProblem = false;
nextProblem();
}
else if (obj == rb_reducing){
//System.out.println("rb_reducing");
//the program is in "no reduce mode" actually
//it should switch to "reduce-mode"
bl_with_reducing = true;
nextProblem();
}else if (obj == rb_no_reducing){
//System.out.println("rb_no_reucing");
//the program is in "reduce mode" actually
//it should switch to "no reduce-mode"
bl_with_reducing = false;
nextProblem();
}
/*
* else if(obj == jmiCreateWorkSheet){ new WorkSheetDialog(
* ExerciseGenerator.FRACTIONS_TO_DECIMAL,
* lang.Messages.getString("fraction_to_decimal") ); }
*/
}// actionPerformed
public void keyPressed(KeyEvent event) {
Object obj = event.getSource();
int key = event.getKeyCode();
lb_info.setText("");
if (obj == btn_continue & key == KeyEvent.VK_ENTER) {
nextProblem();
} else if (obj == btn_end & key == KeyEvent.VK_ENTER) {
close_it();
} else if (obj == tf_decimal & key == KeyEvent.VK_ENTER && tf_decimal.isEditable()) {
// custom exercise
if (readInputDouble(tf_decimal) != null) {
double dec = readInputDouble(tf_decimal);
if (dec >= 1 || dec <= 0) {
lb_info.setText(lang.Messages
.getString("decimal_out_of_range"));
//FIXME not more than 2 digits!!
return;
}
decimal = dec;
denominator_1 = calculateDenominator1(decimal);
fraction.setNenner_1(denominator_1);
tf_denominator_1.setText(String.valueOf(denominator_1));
pizza1.drawEmptyPizzaAsRectangle(denominator_1, false, false);
pizza2.noPizzaAsRectangle();
tf_decimal.setEditable(false);
tf_numerator_1.setEditable(true);
tf_numerator_1.requestFocusInWindow();
}
} else if (obj == tf_numerator_1 & key == KeyEvent.VK_ENTER && tf_numerator_1.isEditable()) {
if (readInputInt(tf_numerator_1) != null) {
int num = readInputInt(tf_numerator_1);
numerator_1 = calculateNumerator1(decimal);
if (numerator_1 == num) {
pizza1.drawPizzaAsRectangle(num, denominator_1,Color.yellow, false, false);
tf_numerator_1.setEditable(false);
if(JFractionLab.greatestCommonDivisor(numerator_1, denominator_1) != 1){
//reducable
if(bl_with_reducing){
tf_numerator_1.setEditable(false);
tf_numerator_2.setEditable(true);
tf_numerator_2.requestFocusInWindow();
}else{
new WannaReduceQuestion(this);
this.toFront(); //damit das fenster wieder aktiv ist und den focus wieder hat.
if(bl_wannaReduceQuestion_AnswerIsYes){
tf_numerator_1.setEditable(false);
tf_numerator_2.setEditable(true);
tf_numerator_2.requestFocusInWindow();
}else{
points++;
pdsp.setText(String.valueOf(points));
owner.setPoints(points, "decimalToFraction");
btn_continue.requestFocusInWindow();
}
}
}else{
//not recuable
tf_numerator_1.setEditable(false);
lb_info.setText(lang.Messages.getString("that_is_right"));
points++;
pdsp.setText(String.valueOf(points));
owner.setPoints(points, "decimalToFraction");
btn_continue.requestFocusInWindow();
}
} else if (numerator_1 < num) {
pizza1.drawPizzaAsRectangle(num, denominator_1, Color.red,false, false);
lb_info.setText(decimal + " * " + denominator_1 + " = ?");
} else {
pizza1.drawPizzaAsRectangle(num, denominator_1, Color.red,false, false);
lb_info.setText(decimal + " * " + denominator_1 + " = ?");
}
}
}else if (obj == tf_numerator_2 & key == KeyEvent.VK_ENTER && tf_numerator_2.isEditable()) {
if (readInputInt(tf_numerator_2) != null) {
int prov = readInputInt(tf_numerator_2);
boolean isOK = false;
try {
if(numerator_1 % prov == 0){
if(denominator_1 % (numerator_1 / prov) == 0){
isOK = true;
}
}
} catch (Exception e) { }
if(isOK){
numerator_2 = prov;
tf_numerator_2.setEditable(false);
tf_denominator_2.setEditable(true);
tf_denominator_2.requestFocusInWindow();
}else{
lb_info.setText(lang.Messages.getString("wrong_numerator"));
tf_numerator_2.setText("");
}
}
}
else if (obj == tf_denominator_2 & key == KeyEvent.VK_ENTER && tf_denominator_2.isEditable()) {
if (readInputInt(tf_denominator_2) != null) {
if(readInputInt(tf_denominator_2) <= 100){
denominator_2 = readInputInt(tf_denominator_2);
int reduceFactor = numerator_1 / numerator_2;
try {
if(denominator_1 / reduceFactor == denominator_2){
//fraction is ok
if(JFractionLab.greatestCommonDivisor(numerator_2, denominator_2) != 1){
//fraction is reducable
pizza2.drawPizzaAsRectangle(numerator_2, denominator_2, Color.pink,false,false);
lb_info.setText(lang.Messages.getString("reduce_better"));
tf_denominator_2.setEditable(false);
tf_numerator_2.setEditable(true);
tf_numerator_2.requestFocusInWindow();
}else{
//fraction is NOT reducable
pizza2.drawPizzaAsRectangle(numerator_2, denominator_2, Color.yellow,false,false);
lb_info.setText(lang.Messages.getString("that_is_right"));
points++;
points++;
pdsp.setText(String.valueOf(points));
owner.setPoints(points, "decimalToFraction");
btn_continue.requestFocusInWindow();
}
}else{
//fraction is not ok
lb_info.setText(lang.Messages.getString("n_and_dn_do_not_match"));
tf_denominator_2.setEditable(false);
tf_numerator_2.setEditable(true);
tf_numerator_2.requestFocusInWindow();
}
} catch (Exception e) {
JOptionPane.showMessageDialog(this, "Error, DecimalToFraction/denominator_1 / reduceFactor\n please send an email to gnugeo@gnugeo.de");
}
}else{
tf_denominator_2.setEditable(false);
tf_numerator_1.setEditable(true);
tf_numerator_1.requestFocusInWindow();
lb_info.setText(lang.Messages.getString("denominator_maximal_100"));
}
}else{
tf_denominator_2.setText("");
lb_info.setText(lang.Messages.getString("nb_is_not_correct"));
}
}
}// keyPressed
public void keyTyped(KeyEvent event) {
}
public void keyReleased(KeyEvent event) {
}
}// class
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