int[] columns = {MARGIN_X, MARGIN_X + 90, MARGIN_X + 90 * 2, MARGIN_X + 90 * 3, MARGIN_X + 90 * 4};
int[] rows = {MARGIN_Y, MARGIN_Y + 100, MARGIN_Y + 100 + 80, MARGIN_Y + 100 + 80 * 2, MARGIN_Y + 100 + 80 * 3, MARGIN_Y + 100 + 80 * 4};
initInputScreen(columns, rows);
initButtons(columns, rows);
initCalculatorTypeSelector();
initThemeSelector();
window.setLayout(null);
window.setResizable(false);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setVisible(true);
}
public double calculate(double firstNumber, double secondNumber, char operator) {
switch (operator) {
case '+':
return firstNumber + secondNumber;
case '-':
return firstNumber - secondNumber;
case '*':
return firstNumber * secondNumber;
case '/':
return firstNumber / secondNumber;
case '%':
return firstNumber % secondNumber;
case '^':
return Math.pow(firstNumber, secondNumber);
default:
return secondNumber;
}
}
private void initThemeSelector() {
comboTheme = createComboBox(themesMap.keySet().toArray(new String[0]), 230, 30, "Theme");
comboTheme.addItemListener(event -> {
if (event.getStateChange() != ItemEvent.SELECTED)
return;
String selectedTheme = (String) event.getItem();
applyTheme(themesMap.get(selectedTheme));
});
if (themesMap.entrySet().iterator().hasNext()) {
applyTheme(themesMap.entrySet().iterator().next().getValue());
}
}
private void initInputScreen(int[] columns, int[] rows) {
inputScreen = new JTextField("0");
inputScreen.setBounds(columns[0], rows[0], 350, 70);
inputScreen.setEditable(false);
inputScreen.setBackground(Color.WHITE);
inputScreen.setFont(new Font(FONT_NAME, Font.PLAIN, 33));
window.add(inputScreen);
}
private void initCalculatorTypeSelector() {
comboCalculatorType = createComboBox(new String[]{"Standard", "Scientific"}, 20, 30, "Calculator type");
comboCalculatorType.addItemListener(event -> {
if (event.getStateChange() != ItemEvent.SELECTED)
return;
String selectedItem = (String) event.getItem();
switch (selectedItem) {
case "Standard":
window.setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
btnRoot.setVisible(false);
btnPower.setVisible(false);
btnLog.setVisible(false);
break;
case "Scientific":
window.setSize(WINDOW_WIDTH + 80, WINDOW_HEIGHT);
btnRoot.setVisible(true);
btnPower.setVisible(true);
btnLog.setVisible(true);
break;
}
});
}
private void initButtons(int[] columns, int[] rows) {
btnC = createButton("C", columns[0], rows[1]);
btnC.addActionListener(event -> {
inputScreen.setText("0");
selectedOperator = ' ';
typedValue = 0;
});
btnBack = createButton("<-", columns[1], rows[1]);
btnBack.addActionListener(event -> {
String str = inputScreen.getText();
StringBuilder str2 = new StringBuilder();
for (int i = 0; i < (str.length() - 1); i++) {
str2.append(str.charAt(i));
}
if (str2.toString().equals("")) {
inputScreen.setText("0");
} else {
inputScreen.setText(str2.toString());
}
});
btnMod = createButton("%", columns[2], rows[1]);
btnMod.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()) || !go)
return;
typedValue = calculate(typedValue, Double.parseDouble(inputScreen.getText()), selectedOperator);
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '%';
go = false;
addToDisplay = false;
});
btnDiv = createButton("/", columns[3], rows[1]);
btnDiv.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = calculate(typedValue, Double.parseDouble(inputScreen.getText()), selectedOperator);
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '/';
go = false;
addToDisplay = false;
} else {
selectedOperator = '/';
}
});
btn7 = createButton("7", columns[0], rows[2]);
btn7.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("7");
} else {
inputScreen.setText(inputScreen.getText() + "7");
}
} else {
inputScreen.setText("7");
addToDisplay = true;
}
go = true;
});
btn8 = createButton("8", columns[1], rows[2]);
btn8.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("8");
} else {
inputScreen.setText(inputScreen.getText() + "8");
}
} else {
inputScreen.setText("8");
addToDisplay = true;
}
go = true;
});
btn9 = createButton("9", columns[2], rows[2]);
btn9.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("9");
} else {
inputScreen.setText(inputScreen.getText() + "9");
}
} else {
inputScreen.setText("9");
addToDisplay = true;
}
go = true;
});
btnMul = createButton("*", columns[3], rows[2]);
btnMul.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = calculate(typedValue, Double.parseDouble(inputScreen.getText()), selectedOperator);
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '*';
go = false;
addToDisplay = false;
} else {
selectedOperator = '*';
}
});
btn4 = createButton("4", columns[0], rows[3]);
btn4.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("4");
} else {
inputScreen.setText(inputScreen.getText() + "4");
}
} else {
inputScreen.setText("4");
addToDisplay = true;
}
go = true;
});
btn5 = createButton("5", columns[1], rows[3]);
btn5.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("5");
} else {
inputScreen.setText(inputScreen.getText() + "5");
}
} else {
inputScreen.setText("5");
addToDisplay = true;
}
go = true;
});
btn6 = createButton("6", columns[2], rows[3]);
btn6.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("6");
} else {
inputScreen.setText(inputScreen.getText() + "6");
}
} else {
inputScreen.setText("6");
addToDisplay = true;
}
go = true;
});
btnSub = createButton("-", columns[3], rows[3]);
btnSub.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = calculate(typedValue, Double.parseDouble(inputScreen.getText()), selectedOperator);
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '-';
go = false;
addToDisplay = false;
} else {
selectedOperator = '-';
}
});
btn1 = createButton("1", columns[0], rows[4]);
btn1.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("1");
} else {
inputScreen.setText(inputScreen.getText() + "1");
}
} else {
inputScreen.setText("1");
addToDisplay = true;
}
go = true;
});
btn2 = createButton("2", columns[1], rows[4]);
btn2.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("2");
} else {
inputScreen.setText(inputScreen.getText() + "2");
}
} else {
inputScreen.setText("2");
addToDisplay = true;
}
go = true;
});
btn3 = createButton("3", columns[2], rows[4]);
btn3.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("3");
} else {
inputScreen.setText(inputScreen.getText() + "3");
}
} else {
inputScreen.setText("3");
addToDisplay = true;
}
go = true;
});
btnAdd = createButton("+", columns[3], rows[4]);
btnAdd.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = calculate(typedValue, Double.parseDouble(inputScreen.getText()), selectedOperator);
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '+';
go = false;
addToDisplay = false;
} else {
selectedOperator = '+';
}
});
btnPoint = createButton(".", columns[0], rows[5]);
btnPoint.addActionListener(event -> {
if (addToDisplay) {
if (!inputScreen.getText().contains(".")) {
inputScreen.setText(inputScreen.getText() + ".");
}
} else {
inputScreen.setText("0.");
addToDisplay = true;
}
go = true;
});
btn0 = createButton("0", columns[1], rows[5]);
btn0.addActionListener(event -> {
if (addToDisplay) {
if (Pattern.matches("[0]*", inputScreen.getText())) {
inputScreen.setText("0");
} else {
inputScreen.setText(inputScreen.getText() + "0");
}
} else {
inputScreen.setText("0");
addToDisplay = true;
}
go = true;
});
btnEqual = createButton("=", columns[2], rows[5]);
btnEqual.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = calculate(typedValue, Double.parseDouble(inputScreen.getText()), selectedOperator);
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '=';
addToDisplay = false;
}
});
btnEqual.setSize(2 * BUTTON_WIDTH + 10, BUTTON_HEIGHT);
btnRoot = createButton("√", columns[4], rows[1]);
btnRoot.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = Math.sqrt(Double.parseDouble(inputScreen.getText()));
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '√';
addToDisplay = false;
}
});
btnRoot.setVisible(false);
btnPower = createButton("pow", columns[4], rows[2]);
btnPower.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = calculate(typedValue, Double.parseDouble(inputScreen.getText()), selectedOperator);
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = '^';
go = false;
addToDisplay = false;
} else {
selectedOperator = '^';
}
});
btnPower.setFont(new Font("Comic Sans MS", Font.PLAIN, 24));
btnPower.setVisible(false);
btnLog = createButton("ln", columns[4], rows[3]);
btnLog.addActionListener(event -> {
if (!Pattern.matches(DOUBLE_OR_NUMBER_REGEX, inputScreen.getText()))
return;
if (go) {
typedValue = Math.log(Double.parseDouble(inputScreen.getText()));
if (Pattern.matches("[-]?[\\d]+[.][0]*", String.valueOf(typedValue))) {
inputScreen.setText(String.valueOf((int) typedValue));
} else {
inputScreen.setText(String.valueOf(typedValue));
}
selectedOperator = 'l';
addToDisplay = false;
}
});
btnLog.setVisible(false);
}
private JComboBox<String> createComboBox(String[] items, int x, int y, String toolTip) {
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