diff -r aaf86ae88f46 -r b26510e3e105 javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/demo/calc/staticcompilation/Calc.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/demo/calc/staticcompilation/Calc.java	Mon Jan 21 16:04:25 2013 +0100
@@ -0,0 +1,112 @@
+/**
+ * Back 2 Browser Bytecode Translator
+ * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. Look for COPYING file in the top folder.
+ * If not, see http://opensource.org/licenses/GPL-2.0.
+ */
+package org.apidesign.bck2brwsr.demo.calc.staticcompilation;
+
+import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;
+import org.apidesign.bck2brwsr.htmlpage.api.On;
+import static org.apidesign.bck2brwsr.htmlpage.api.OnEvent.*;
+import org.apidesign.bck2brwsr.htmlpage.api.Page;
+import org.apidesign.bck2brwsr.htmlpage.api.Property;
+
+/** HTML5 & Java demo showing the power of 
+ * <a href="http://wiki.apidesign.org/wiki/AnnotationProcessor">annotation processors</a>
+ * as well as other goodies.
+ * 
+ * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ */
+@Page(xhtml="Calculator.xhtml", properties = {
+    @Property(name = "memory", type = double.class),
+    @Property(name = "display", type = double.class),
+    @Property(name = "operation", type = String.class),
+    @Property(name = "hover", type = boolean.class)
+})
+public class Calc {
+    static {
+        new Calculator().applyBindings();
+    }
+    
+    @On(event = CLICK, id="clear")
+    static void clear(Calculator c) {
+        c.setMemory(0);
+        c.setOperation(null);
+        c.setDisplay(0);
+    }
+    
+    @On(event = CLICK, id= { "plus", "minus", "mul", "div" })
+    static void applyOp(Calculator c, String op) {
+        c.setMemory(c.getDisplay());
+        c.setOperation(op);
+        c.setDisplay(0);
+    }
+
+    @On(event = MOUSE_OVER, id= { "result" })
+    static void attemptingIn(Calculator c, String op) {
+        c.setHover(true);
+    }
+    @On(event = MOUSE_OUT, id= { "result" })
+    static void attemptingOut(Calculator c, String op) {
+        c.setHover(false);
+    }
+    
+    @On(event = CLICK, id="result")
+    static void computeTheValue(Calculator c) {
+        c.setDisplay(compute(
+            c.getOperation(), 
+            c.getMemory(), 
+            c.getDisplay()
+        ));
+        c.setMemory(0);
+    }
+    
+    private static double compute(String op, double memory, double display) {
+        switch (op) {
+            case "plus": return memory + display;
+            case "minus": return memory - display;
+            case "mul": return memory * display;
+            case "div": return memory / display;
+            default: throw new IllegalStateException(op);
+        }
+    }
+    
+    @On(event = CLICK, id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"}) 
+    static void addDigit(String digit, Calculator c) {
+        digit = digit.substring(1);
+        
+        double v = c.getDisplay();
+        if (v == 0.0) {
+            c.setDisplay(Integer.parseInt(digit));
+        } else {
+            String txt = Double.toString(v);
+            if (txt.endsWith(".0")) {
+                txt = txt.substring(0, txt.length() - 2);
+            }
+            txt = txt + digit;
+            c.setDisplay(Double.parseDouble(txt));
+        }
+    }
+
+    @ComputedProperty
+    public static String displayPreview(
+        double display, boolean hover, double memory, String operation
+    ) {
+        if (!hover) {
+            return "Type numbers and perform simple operations! Press '=' to get result.";
+        }
+        return "Attempt to compute " + memory + " " + operation + " " + display + " = " + compute(operation, memory, display);
+    }
+}