jaroslav@142: /**
jaroslav@142:  * Back 2 Browser Bytecode Translator
jaroslav@142:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@142:  *
jaroslav@142:  * This program is free software: you can redistribute it and/or modify
jaroslav@142:  * it under the terms of the GNU General Public License as published by
jaroslav@142:  * the Free Software Foundation, version 2 of the License.
jaroslav@142:  *
jaroslav@142:  * This program is distributed in the hope that it will be useful,
jaroslav@142:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@142:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@142:  * GNU General Public License for more details.
jaroslav@142:  *
jaroslav@142:  * You should have received a copy of the GNU General Public License
jaroslav@142:  * along with this program. Look for COPYING file in the top folder.
jaroslav@142:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@142:  */
jaroslav@511: package org.apidesign.bck2brwsr.demo.calc.staticcompilation;
jaroslav@141: 
jaroslav@498: import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;
jaroslav@435: import org.apidesign.bck2brwsr.htmlpage.api.On;
jaroslav@435: import static org.apidesign.bck2brwsr.htmlpage.api.OnEvent.*;
jaroslav@141: import org.apidesign.bck2brwsr.htmlpage.api.Page;
jaroslav@492: import org.apidesign.bck2brwsr.htmlpage.api.Property;
jaroslav@141: 
jaroslav@198: /** HTML5 & Java demo showing the power of 
jaroslav@198:  * <a href="http://wiki.apidesign.org/wiki/AnnotationProcessor">annotation processors</a>
jaroslav@198:  * as well as other goodies.
jaroslav@198:  * 
jaroslav@198:  * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@198:  */
jaroslav@492: @Page(xhtml="Calculator.xhtml", properties = {
jaroslav@498:     @Property(name = "memory", type = double.class),
jaroslav@498:     @Property(name = "display", type = double.class),
jaroslav@498:     @Property(name = "operation", type = String.class),
jaroslav@877:     @Property(name = "hover", type = boolean.class),
jaroslav@877:     @Property(name = "history", type = double.class, array = true)
jaroslav@492: })
jaroslav@511: public class Calc {
jaroslav@510:     static {
jaroslav@510:         new Calculator().applyBindings();
jaroslav@510:     }
jaroslav@505:     
jaroslav@435:     @On(event = CLICK, id="clear")
jaroslav@510:     static void clear(Calculator c) {
jaroslav@510:         c.setMemory(0);
jaroslav@510:         c.setOperation(null);
jaroslav@510:         c.setDisplay(0);
jtulach@197:     }
jtulach@197:     
jaroslav@435:     @On(event = CLICK, id= { "plus", "minus", "mul", "div" })
jaroslav@830:     static void applyOp(Calculator c, String id) {
jaroslav@510:         c.setMemory(c.getDisplay());
jaroslav@830:         c.setOperation(id);
jaroslav@510:         c.setDisplay(0);
jtulach@197:     }
jaroslav@498: 
jaroslav@498:     @On(event = MOUSE_OVER, id= { "result" })
jaroslav@830:     static void attemptingIn(Calculator c) {
jaroslav@510:         c.setHover(true);
jaroslav@498:     }
jaroslav@498:     @On(event = MOUSE_OUT, id= { "result" })
jaroslav@830:     static void attemptingOut(Calculator c) {
jaroslav@510:         c.setHover(false);
jaroslav@498:     }
jtulach@197:     
jaroslav@435:     @On(event = CLICK, id="result")
jaroslav@510:     static void computeTheValue(Calculator c) {
jaroslav@877:         final double newValue = compute(
jaroslav@510:             c.getOperation(), 
jaroslav@510:             c.getMemory(), 
jaroslav@510:             c.getDisplay()
jaroslav@877:         );
jaroslav@877:         c.setDisplay(newValue);
jaroslav@877:         c.getHistory().add(newValue);
jaroslav@510:         c.setMemory(0);
jaroslav@498:     }
jaroslav@498:     
jaroslav@498:     private static double compute(String op, double memory, double display) {
jaroslav@498:         switch (op) {
jaroslav@498:             case "plus": return memory + display;
jaroslav@498:             case "minus": return memory - display;
jaroslav@498:             case "mul": return memory * display;
jaroslav@498:             case "div": return memory / display;
jaroslav@498:             default: throw new IllegalStateException(op);
jtulach@197:         }
jtulach@197:     }
jtulach@197:     
jaroslav@435:     @On(event = CLICK, id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"}) 
jaroslav@830:     static void addDigit(String id, Calculator c) {
jaroslav@830:         id = id.substring(1);
jaroslav@492:         
jaroslav@510:         double v = c.getDisplay();
jaroslav@492:         if (v == 0.0) {
jaroslav@830:             c.setDisplay(Integer.parseInt(id));
jtulach@197:         } else {
jaroslav@495:             String txt = Double.toString(v);
jaroslav@495:             if (txt.endsWith(".0")) {
jaroslav@495:                 txt = txt.substring(0, txt.length() - 2);
jaroslav@495:             }
jaroslav@830:             txt = txt + id;
jaroslav@510:             c.setDisplay(Double.parseDouble(txt));
jtulach@197:         }
jaroslav@141:     }
jaroslav@498: 
jaroslav@498:     @ComputedProperty
jaroslav@498:     public static String displayPreview(
jaroslav@498:         double display, boolean hover, double memory, String operation
jaroslav@498:     ) {
jaroslav@498:         if (!hover) {
jaroslav@498:             return "Type numbers and perform simple operations! Press '=' to get result.";
jaroslav@498:         }
jaroslav@498:         return "Attempt to compute " + memory + " " + operation + " " + display + " = " + compute(operation, memory, display);
jaroslav@498:     }
jaroslav@141: }