jaroslav@141: package org.apidesign.bck2brwsr.mavenhtml;
jaroslav@141: 
jaroslav@141: import org.apidesign.bck2brwsr.htmlpage.api.OnClick;
jaroslav@141: import org.apidesign.bck2brwsr.htmlpage.api.Page;
jaroslav@141: 
jaroslav@141: @Page(xhtml="Calculator.xhtml")
jaroslav@141: public class App {
jaroslav@141:     private static final int OP_PLUS = 1;
jaroslav@141:     private static final int OP_MINUS = 2;
jaroslav@141:     private static final int OP_MUL = 3;
jaroslav@141:     private static final int OP_DIV = 4;
jaroslav@141:     
jaroslav@141:     static double memory = 0;
jaroslav@141:     static int operation = 0;
jaroslav@141:     
jaroslav@141:     
jaroslav@141:     
jaroslav@141:     @OnClick(id="clear")
jaroslav@141:     static void clear() {
jaroslav@141:         setValue(0.0);
jaroslav@141:     }
jaroslav@141:     
jaroslav@141:     private static void setValue(double v) {
jaroslav@141:         StringBuilder sb = new StringBuilder();
jaroslav@141:         sb.append(v);
jaroslav@141:         Calculator.DISPLAY.setValue(sb.toString());
jaroslav@141:     }
jaroslav@141:     
jaroslav@141:     private static double getValue() {
jaroslav@141:         return Double.parseDouble(Calculator.DISPLAY.getValue());
jaroslav@141:     }
jaroslav@141:     
jaroslav@141:     @OnClick(id="plus")
jaroslav@141:     static void plus() {
jaroslav@141:         memory = getValue();
jaroslav@141:         operation = OP_PLUS;
jaroslav@141:         setValue(0.0);
jaroslav@141:     }
jaroslav@141:     
jaroslav@141:     @OnClick(id="minus")
jaroslav@141:     static void minus() {
jaroslav@141:         memory = getValue();
jaroslav@141:         operation = OP_MINUS;
jaroslav@141:         setValue(0.0);
jaroslav@141:     }
jaroslav@141:     
jaroslav@141:     @OnClick(id="mul")
jaroslav@141:     static void mul() {
jaroslav@141:         memory = getValue();
jaroslav@141:         operation = OP_MUL;
jaroslav@141:         setValue(0.0);
jaroslav@141:     }
jaroslav@141:     
jaroslav@141:     @OnClick(id="result")
jaroslav@141:     static void computeTheValue() {
jaroslav@141:         switch (operation) {
jaroslav@141:             case 0: break;
jaroslav@141:             case OP_PLUS: setValue(memory + getValue()); break;
jaroslav@141:             case OP_MINUS: setValue(memory - getValue()); break;
jaroslav@141:             case OP_MUL: setValue(memory * getValue()); break;
jaroslav@141:         }
jaroslav@141:     }
jaroslav@141:     
jaroslav@141:     @OnClick(id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"}) 
jaroslav@141:     static void addDigit(String digit) {
jaroslav@141:         digit = digit.substring(1);
jaroslav@141:         String v = Calculator.DISPLAY.getValue();
jaroslav@141:         if ("0".equals(v) || v == null) {
jaroslav@141:             Calculator.DISPLAY.setValue(digit);
jaroslav@141:         } else {
jaroslav@141:             Calculator.DISPLAY.setValue(v + digit);
jaroslav@141:         }
jaroslav@141:     }
jaroslav@141: }