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/**
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* Back 2 Browser Bytecode Translator
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* Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. Look for COPYING file in the top folder.
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* If not, see http://opensource.org/licenses/GPL-2.0.
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*/
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package org.apidesign.bck2brwsr.mavenhtml;
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import org.apidesign.bck2brwsr.htmlpage.api.OnClick;
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import org.apidesign.bck2brwsr.htmlpage.api.Page;
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@Page(xhtml="Calculator.xhtml")
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public class App {
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private static final int OP_PLUS = 1;
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private static final int OP_MINUS = 2;
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private static final int OP_MUL = 3;
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private static final int OP_DIV = 4;
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static double memory = 0;
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static int operation = 0;
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@OnClick(id="clear")
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static void clear() {
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setValue(0.0);
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}
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private static void setValue(double v) {
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StringBuilder sb = new StringBuilder();
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sb.append(v);
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Calculator.DISPLAY.setValue(sb.toString());
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}
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private static double getValue() {
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return Double.parseDouble(Calculator.DISPLAY.getValue());
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}
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@OnClick(id="plus")
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static void plus() {
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memory = getValue();
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operation = OP_PLUS;
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setValue(0.0);
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}
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@OnClick(id="minus")
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static void minus() {
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memory = getValue();
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operation = OP_MINUS;
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setValue(0.0);
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}
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@OnClick(id="mul")
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static void mul() {
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memory = getValue();
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operation = OP_MUL;
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setValue(0.0);
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}
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@OnClick(id="result")
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static void computeTheValue() {
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switch (operation) {
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case 0: break;
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case OP_PLUS: setValue(memory + getValue()); break;
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case OP_MINUS: setValue(memory - getValue()); break;
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case OP_MUL: setValue(memory * getValue()); break;
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}
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}
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@OnClick(id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"})
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static void addDigit(String digit) {
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digit = digit.substring(1);
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String v = Calculator.DISPLAY.getValue();
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if ("0".equals(v) || v == null) {
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Calculator.DISPLAY.setValue(digit);
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} else {
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Calculator.DISPLAY.setValue(v + digit);
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}
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}
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}
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