javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java
Moving towards testability: Model class does not have any public fields, rather instance onces
2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.mavenhtml;
20 import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;
21 import org.apidesign.bck2brwsr.htmlpage.api.On;
22 import static org.apidesign.bck2brwsr.htmlpage.api.OnEvent.*;
23 import org.apidesign.bck2brwsr.htmlpage.api.Page;
24 import org.apidesign.bck2brwsr.htmlpage.api.Property;
26 /** HTML5 & Java demo showing the power of
27 * <a href="http://wiki.apidesign.org/wiki/AnnotationProcessor">annotation processors</a>
28 * as well as other goodies.
30 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
32 @Page(xhtml="Calculator.xhtml", properties = {
33 @Property(name = "memory", type = double.class),
34 @Property(name = "display", type = double.class),
35 @Property(name = "operation", type = String.class),
36 @Property(name = "hover", type = boolean.class)
39 private static final Calculator CALC = new Calculator().applyBindings();
41 @On(event = CLICK, id="clear")
44 CALC.setOperation(null);
48 @On(event = CLICK, id= { "plus", "minus", "mul", "div" })
49 static void applyOp(String op) {
50 CALC.setMemory(CALC.getDisplay());
51 CALC.setOperation(op);
55 @On(event = MOUSE_OVER, id= { "result" })
56 static void attemptingIn(String op) {
59 @On(event = MOUSE_OUT, id= { "result" })
60 static void attemptingOut(String op) {
64 @On(event = CLICK, id="result")
65 static void computeTheValue() {
66 CALC.setDisplay(compute(
74 private static double compute(String op, double memory, double display) {
76 case "plus": return memory + display;
77 case "minus": return memory - display;
78 case "mul": return memory * display;
79 case "div": return memory / display;
80 default: throw new IllegalStateException(op);
84 @On(event = CLICK, id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"})
85 static void addDigit(String digit) {
86 digit = digit.substring(1);
88 double v = CALC.getDisplay();
90 CALC.setDisplay(Integer.parseInt(digit));
92 String txt = Double.toString(v);
93 if (txt.endsWith(".0")) {
94 txt = txt.substring(0, txt.length() - 2);
97 CALC.setDisplay(Double.parseDouble(txt));
102 public static String displayPreview(
103 double display, boolean hover, double memory, String operation
106 return "Type numbers and perform simple operations! Press '=' to get result.";
108 return "Attempt to compute " + memory + " " + operation + " " + display + " = " + compute(operation, memory, display);