Code for Advanced Calculator
/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of Qt Jambi.
**
** ** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
package com.trolltech.examples;
import java.util.*;
import com.trolltech.demos.Interpreter;
import com.trolltech.qt.gui.*;
@QtJambiExample(name = "Advanced Calculator")
public class AdvancedCalculator extends QMainWindow {
public static void main(String[] args) {
QApplication.initialize(args);
AdvancedCalculator calculator = new AdvancedCalculator();
calculator.show();
QApplication.exec();
}
private QLineEdit lineEdit;
private QTextBrowser textBrowser;
private Interpreter interpreter = new Interpreter();
public AdvancedCalculator() {
Vector<String> uiTypes = new Vector<String>(3);
uiTypes.add("Simple");
uiTypes.add("Normal");
uiTypes.add("Dockable");
setWindowIcon(new QIcon("classpath:com/trolltech/images/qt-logo.png"));
String item = QInputDialog.getItem(this, tr("Ui selector"), tr("Ui configurations:"), uiTypes, 0, false);
if (item == null || item.equals("Simple")) {
Ui_CalculatorSimple uiSimple = new Ui_CalculatorSimple();
uiSimple.setupUi(this);
lineEdit = uiSimple.lineEdit;
textBrowser = uiSimple.textBrowser;
} else if (item.equals("Normal")) {
Ui_CalculatorNormal uiNormal = new Ui_CalculatorNormal();
uiNormal.setupUi(this);
lineEdit = uiNormal.lineEdit;
textBrowser = uiNormal.textBrowser;
} else if (item.equals("Dockable")) {
Ui_CalculatorDockable uiDockable = new Ui_CalculatorDockable();
uiDockable.setupUi(this);
lineEdit = uiDockable.lineEdit;
textBrowser = uiDockable.textBrowser;
}
}
public void on_button_equal_clicked() {
String expression = lineEdit.text();
String result = "";
boolean error = false;
try {
result = interpreter.evaluate(interpreter.parse(expression)).toString();
} catch (Interpreter.ParseException exception) {
result = "Error: <font color=\"red\">" + exception.getMessage() + "</font>";
error = true;
}
textBrowser.append(expression + "<b> = " + result + "</b><br>");
if (error)
result = expression;
lineEdit.setText(result);
}
public void type(String s) {
lineEdit.setText(lineEdit.text() + s);
}
public void typeAround(String s) {
lineEdit.setText(s + "(" + lineEdit.text() + ")");
}
public void on_button_1_clicked() {
type("1");
}
public void on_button_2_clicked() {
type("2");
}
public void on_button_3_clicked() {
type("3");
}
public void on_button_4_clicked() {
type("4");
}
public void on_button_5_clicked() {
type("5");
}
public void on_button_6_clicked() {
type("6");
}
public void on_button_7_clicked() {
type("7");
}
public void on_button_8_clicked() {
type("8");
}
public void on_button_9_clicked() {
type("9");
}
public void on_button_0_clicked() {
type("0");
}
public void on_button_add_clicked() {
type("+");
}
public void on_button_subtract_clicked() {
type("-");
}
public void on_button_multiply_clicked() {
type("*");
}
public void on_button_devide_clicked() {
type("/");
}
public void on_button_comma_clicked() {
type(".");
}
public void on_button_left_clicked() {
type("(");
}
public void on_button_right_clicked() {
type(")");
}
public void on_button_sin_clicked() {
typeAround("sin");
}
public void on_button_cos_clicked() {
typeAround("cos");
}
public void on_button_random_clicked() {
type("random()");
}
public void on_button_functions_clicked() {
Vector<String> functionKeys = new Vector<String>(interpreter.functions.size());
functionKeys.addAll(interpreter.functions.keySet());
String key = QInputDialog.getItem(this, tr("Function selector"), tr("Available functions:"), functionKeys, 0, false);
if (key != null)
type(key);
}
}