javaquery/demo-calculator/src/main/resources/org/apidesign/bck2brwsr/mavenhtml/Calculator.xhtml
1 <?xml version="1.0" encoding="UTF-8"?>
4 Back 2 Browser Bytecode Translator
5 Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, version 2 of the License.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. Look for COPYING file in the top folder.
18 If not, see http://opensource.org/licenses/GPL-2.0.
22 <html xmlns="http://www.w3.org/1999/xhtml">
24 <title>Simple Calculator in HTML5 and Java</title>
26 <style type="text/css">
27 body {color: #ffffff; background-color: #121e31; font-family: Monospaced}
28 pre {color: #ffffff; background-color: #121e31; font-family: Monospaced}
29 table {color: #ffffff; background-color: #121e31; font-family: Monospaced}
30 .string {color: #e2ce00}
32 .ST1 {color: #0000cc; font-family: Monospaced; font-weight: bold}
34 .comment {color: #428bdd}
35 .keyword-directive {color: #f8bb00}
37 .ST0 {color: #628fb5; background-color: #1b3450}
38 .sgml-comment {color: #808080}
39 .value {color: #99006b}
40 .argument {color: #007c00}
41 .sgml-declaration {color: #bf9221}
45 <h1>Java and HTML5 - Together at Last!</h1>
46 <table border="0" cellspacing="2">
49 <td colspan="4"><input id="display" value="0"
50 style="text-align: right"/>
54 <td><button id="n1">1</button></td>
55 <td><button id="n2">2</button></td>
56 <td><button id="n3">3</button></td>
57 <td><button id="plus">+</button></td>
60 <td><button id="n4">4</button></td>
61 <td><button id="n5">5</button></td>
62 <td><button id="n6">6</button></td>
63 <td><button id="minus">-</button></td>
66 <td><button id="n7">7</button></td>
67 <td><button id="n8">8</button></td>
68 <td><button id="n9">9</button></td>
69 <td><button id="mul">*</button></td>
72 <td><button id="clear">C</button></td>
73 <td><button id="n0">0</button></td>
74 <td><button id="result">=</button></td>
75 <td><button id="div">/</button></td>
80 <script src="/bck2brwsr.js"></script>
81 <script src="/vm.js"></script>
82 <script type="text/javascript">
83 vm.loadClass('org.apidesign.bck2brwsr.mavenhtml.Calculator').class__V();
88 <span class="keyword-directive">package</span> org.apidesign.bck2brwsr.mavenhtml;
90 <span class="keyword-directive">import</span> org.apidesign.bck2brwsr.htmlpage.api.OnClick;
91 <span class="keyword-directive">import</span> org.apidesign.bck2brwsr.htmlpage.api.Page;
93 <span class="comment">/**</span> <span class="comment">HTML5</span><span class="comment"> & </span><span class="comment">Java</span> <span class="comment">demo</span> <span class="comment">showing</span> <span class="comment">the</span> <span class="comment">power</span> <span class="comment">of</span> <a href="http://wiki.apidesign.org/wiki/AnnotationProcessor">annotation processors</a>
94 <span class="comment"> * </span><span class="comment">as</span> <span class="comment">well</span> <span class="comment">as</span> <span class="comment">other</span> <span class="comment">goodies</span><span class="comment">, including type-safe association between</span>
95 <span class="comment"> * </span><span class="comment">an XHTML page and Java.</span>
96 <span class="comment"> * </span>
97 <span class="comment"> * </span><span class="ST1">@author</span> <span class="comment">Jaroslav</span> <span class="comment">Tulach</span> <span class="ST0"><jaroslav.tulach@apidesign.org></span>
98 <span class="comment">*/</span>
99 @Page(xhtml=<span class="string">"</span><span class="string">Calculator.xhtml</span><span class="string">"</span>)
100 <span class="keyword-directive">public</span> <span class="keyword-directive">class</span> App {
101 <span class="keyword-directive">private</span> <span class="keyword-directive">static</span> <span class="keyword-directive">double</span> memory;
102 <span class="keyword-directive">private</span> <span class="keyword-directive">static</span> String operation;
104 @OnClick(id=<span class="string">"</span><span class="string">clear</span><span class="string">"</span>)
105 <span class="keyword-directive">static</span> <span class="keyword-directive">void</span> clear() {
106 memory = <span class="number">0</span>;
107 operation = <span class="keyword-directive">null</span>;
108 Calculator.DISPLAY.setValue(<span class="string">"</span><span class="string">0</span><span class="string">"</span>);
111 @OnClick(id= { <span class="string">"</span><span class="string">plus</span><span class="string">"</span>, <span class="string">"</span><span class="string">minus</span><span class="string">"</span>, <span class="string">"</span><span class="string">mul</span><span class="string">"</span>, <span class="string">"</span><span class="string">div</span><span class="string">"</span> })
112 <span class="keyword-directive">static</span> <span class="keyword-directive">void</span> applyOp(String op) {
115 Calculator.DISPLAY.setValue(<span class="string">"</span><span class="string">0</span><span class="string">"</span>);
118 @OnClick(id=<span class="string">"</span><span class="string">result</span><span class="string">"</span>)
119 <span class="keyword-directive">static</span> <span class="keyword-directive">void</span> computeTheValue() {
120 <span class="keyword-directive">switch</span> (operation) {
121 <span class="keyword-directive">case</span> <span class="string">"</span><span class="string">plus</span><span class="string">"</span>: setValue(memory + getValue()); <span class="keyword-directive">break</span>;
122 <span class="keyword-directive">case</span> <span class="string">"</span><span class="string">minus</span><span class="string">"</span>: setValue(memory - getValue()); <span class="keyword-directive">break</span>;
123 <span class="keyword-directive">case</span> <span class="string">"</span><span class="string">mul</span><span class="string">"</span>: setValue(memory * getValue()); <span class="keyword-directive">break</span>;
124 <span class="keyword-directive">case</span> <span class="string">"</span><span class="string">div</span><span class="string">"</span>: setValue(memory / getValue()); <span class="keyword-directive">break</span>;
125 <span class="keyword-directive">default</span>: <span class="keyword-directive">throw</span> <span class="keyword-directive">new</span> IllegalStateException(operation);
129 @OnClick(id={<span class="string">"</span><span class="string">n0</span><span class="string">"</span>, <span class="string">"</span><span class="string">n1</span><span class="string">"</span>, <span class="string">"</span><span class="string">n2</span><span class="string">"</span>, <span class="string">"</span><span class="string">n3</span><span class="string">"</span>, <span class="string">"</span><span class="string">n4</span><span class="string">"</span>, <span class="string">"</span><span class="string">n5</span><span class="string">"</span>, <span class="string">"</span><span class="string">n6</span><span class="string">"</span>, <span class="string">"</span><span class="string">n7</span><span class="string">"</span>, <span class="string">"</span><span class="string">n8</span><span class="string">"</span>, <span class="string">"</span><span class="string">n9</span><span class="string">"</span>})
130 <span class="keyword-directive">static</span> <span class="keyword-directive">void</span> addDigit(String digit) {
131 digit = digit.substring(<span class="number">1</span>);
132 String v = Calculator.DISPLAY.getValue();
133 <span class="keyword-directive">if</span> (getValue() == <span class="number">0.0</span>) {
134 Calculator.DISPLAY.setValue(digit);
135 } <span class="keyword-directive">else</span> {
136 Calculator.DISPLAY.setValue(v + digit);
140 <span class="keyword-directive">private</span> <span class="keyword-directive">static</span> <span class="keyword-directive">void</span> setValue(<span class="keyword-directive">double</span> v) {
141 StringBuilder sb = <span class="keyword-directive">new</span> StringBuilder();
143 Calculator.DISPLAY.setValue(sb.toString());
146 <span class="keyword-directive">private</span> <span class="keyword-directive">static</span> <span class="keyword-directive">double</span> getValue() {
147 <span class="keyword-directive">try</span> {
148 <span class="keyword-directive">return</span> Double.parseDouble(Calculator.DISPLAY.getValue());
149 } <span class="keyword-directive">catch</span> (NumberFormatException ex) {
150 Calculator.DISPLAY.setValue(<span class="string">"</span><span class="string">err</span><span class="string">"</span>);
151 <span class="keyword-directive">return</span> <span class="number">0.0</span>;