1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/javaquery/demo-static-calculator/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java	Mon Dec 24 07:51:15 2012 +0100
     1.3 @@ -0,0 +1,88 @@
     1.4 +/**
     1.5 + * Back 2 Browser Bytecode Translator
     1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
     1.7 + *
     1.8 + * This program is free software: you can redistribute it and/or modify
     1.9 + * it under the terms of the GNU General Public License as published by
    1.10 + * the Free Software Foundation, version 2 of the License.
    1.11 + *
    1.12 + * This program is distributed in the hope that it will be useful,
    1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.15 + * GNU General Public License for more details.
    1.16 + *
    1.17 + * You should have received a copy of the GNU General Public License
    1.18 + * along with this program. Look for COPYING file in the top folder.
    1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
    1.20 + */
    1.21 +package org.apidesign.bck2brwsr.mavenhtml;
    1.22 +
    1.23 +import org.apidesign.bck2brwsr.htmlpage.api.OnClick;
    1.24 +import org.apidesign.bck2brwsr.htmlpage.api.Page;
    1.25 +
    1.26 +/** HTML5 & Java demo showing the power of 
    1.27 + * <a href="http://wiki.apidesign.org/wiki/AnnotationProcessor">annotation processors</a>
    1.28 + * as well as other goodies.
    1.29 + * 
    1.30 + * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
    1.31 + */
    1.32 +@Page(xhtml="Calculator.xhtml")
    1.33 +public class App {
    1.34 +    private static double memory;
    1.35 +    private static String operation;
    1.36 +    
    1.37 +    @OnClick(id="clear")
    1.38 +    static void clear() {
    1.39 +        memory = 0;
    1.40 +        operation = null;
    1.41 +        Calculator.DISPLAY.setValue("0");
    1.42 +    }
    1.43 +    
    1.44 +    @OnClick(id= { "plus", "minus", "mul", "div" })
    1.45 +    static void applyOp(String op) {
    1.46 +        memory = getValue();
    1.47 +        operation = op;
    1.48 +        Calculator.DISPLAY.setValue("0");
    1.49 +    }
    1.50 +    
    1.51 +    @OnClick(id="result")
    1.52 +    static void computeTheValue() {
    1.53 +        switch (operation) {
    1.54 +            case "plus": setValue(memory + getValue()); break;
    1.55 +            case "minus": setValue(memory - getValue()); break;
    1.56 +            case "mul": setValue(memory * getValue()); break;
    1.57 +            case "div": setValue(memory / getValue()); break;
    1.58 +            default: throw new IllegalStateException(operation);
    1.59 +        }
    1.60 +    }
    1.61 +    
    1.62 +    @OnClick(id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"}) 
    1.63 +    static void addDigit(String digit) {
    1.64 +        digit = digit.substring(1);
    1.65 +        String v = Calculator.DISPLAY.getValue();
    1.66 +        if (getValue() == 0.0) {
    1.67 +            Calculator.DISPLAY.setValue(digit);
    1.68 +        } else {
    1.69 +            Calculator.DISPLAY.setValue(v + digit);
    1.70 +        }
    1.71 +    }
    1.72 +    
    1.73 +    private static void setValue(double v) {
    1.74 +        StringBuilder sb = new StringBuilder();
    1.75 +        sb.append(v);
    1.76 +        if (sb.toString().endsWith(".0")) {
    1.77 +            final int l = sb.length();
    1.78 +            sb.delete(l - 2, l);
    1.79 +        }
    1.80 +        Calculator.DISPLAY.setValue(sb.toString());
    1.81 +    }
    1.82 +
    1.83 +    private static double getValue() {
    1.84 +        try {
    1.85 +            return Double.parseDouble(Calculator.DISPLAY.getValue());
    1.86 +        } catch (NumberFormatException ex) {
    1.87 +            Calculator.DISPLAY.setValue("err");
    1.88 +            return 0.0;
    1.89 +        }
    1.90 +    }
    1.91 +}