--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/script/calculator/calculator.js Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,281 @@
+Function.prototype.bind = function() {
+ var func = this;
+ var thisObject = arguments[0];
+ var args = Array.prototype.slice.call(arguments, 1);
+ return function() {
+ return func.apply(thisObject, args);
+ }
+}
+
+//! [0]
+function Calculator(ui)
+{
+ this.ui = ui;
+
+ this.pendingAdditiveOperator = Calculator.NO_OPERATOR;
+ this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
+ this.sumInMemory = 0;
+ this.sumSoFar = 0;
+ this.factorSoFar = 0;
+ this.waitingForOperand = true;
+
+ with (ui) {
+ display.text = "0";
+
+ zeroButton.clicked.connect(this.digitClicked.bind(this, 0));
+ oneButton.clicked.connect(this.digitClicked.bind(this, 1));
+ twoButton.clicked.connect(this.digitClicked.bind(this, 2));
+ threeButton.clicked.connect(this.digitClicked.bind(this, 3));
+ fourButton.clicked.connect(this.digitClicked.bind(this, 4));
+ fiveButton.clicked.connect(this.digitClicked.bind(this, 5));
+ sixButton.clicked.connect(this.digitClicked.bind(this, 6));
+ sevenButton.clicked.connect(this.digitClicked.bind(this, 7));
+ eightButton.clicked.connect(this.digitClicked.bind(this, 8));
+ nineButton.clicked.connect(this.digitClicked.bind(this, 9));
+
+ pointButton.clicked.connect(this, "pointClicked");
+ changeSignButton.clicked.connect(this, "changeSignClicked");
+
+ backspaceButton.clicked.connect(this, "backspaceClicked");
+ clearButton.clicked.connect(this, "clear");
+ clearAllButton.clicked.connect(this, "clearAll");
+
+ clearMemoryButton.clicked.connect(this, "clearMemory");
+ readMemoryButton.clicked.connect(this, "readMemory");
+ setMemoryButton.clicked.connect(this, "setMemory");
+ addToMemoryButton.clicked.connect(this, "addToMemory");
+
+ divisionButton.clicked.connect(this.multiplicativeOperatorClicked.bind(this, Calculator.DIVISION_OPERATOR));
+ timesButton.clicked.connect(this.multiplicativeOperatorClicked.bind(this, Calculator.TIMES_OPERATOR));
+ minusButton.clicked.connect(this.additiveOperatorClicked.bind(this, Calculator.MINUS_OPERATOR));
+ plusButton.clicked.connect(this.additiveOperatorClicked.bind(this, Calculator.PLUS_OPERATOR));
+
+ squareRootButton.clicked.connect(this.unaryOperatorClicked.bind(this, Calculator.SQUARE_OPERATOR));
+ powerButton.clicked.connect(this.unaryOperatorClicked.bind(this, Calculator.POWER_OPERATOR));
+ reciprocalButton.clicked.connect(this.unaryOperatorClicked.bind(this, Calculator.RECIPROCAL_OPERATOR));
+ equalButton.clicked.connect(this, "equalClicked");
+ }
+}
+//! [0]
+
+Calculator.NO_OPERATOR = 0;
+Calculator.SQUARE_OPERATOR = 1;
+Calculator.POWER_OPERATOR = 2;
+Calculator.RECIPROCAL_OPERATOR = 3;
+Calculator.DIVISION_OPERATOR = 4;
+Calculator.TIMES_OPERATOR = 5;
+Calculator.MINUS_OPERATOR = 6;
+Calculator.PLUS_OPERATOR = 7;
+
+Calculator.prototype.abortOperation = function()
+{
+ this.clearAll();
+ this.ui.display.text = "####";
+}
+
+Calculator.prototype.calculate = function(rightOperand, pendingOperator)
+{
+ if (pendingOperator == Calculator.PLUS_OPERATOR) {
+ this.sumSoFar += rightOperand;
+ } else if (pendingOperator == Calculator.MINUS_OPERATOR) {
+ this.sumSoFar -= rightOperand;
+ } else if (pendingOperator == Calculator.TIMES_OPERATOR) {
+ this.factorSoFar *= rightOperand;
+ } else if (pendingOperator == Calculator.DIVISION_OPERATOR) {
+ if (rightOperand == 0)
+ return false;
+ this.factorSoFar /= rightOperand;
+ }
+ return true;
+}
+
+//! [1]
+Calculator.prototype.digitClicked = function(digitValue)
+{
+ if ((digitValue == 0) && (this.ui.display.text == "0"))
+ return;
+ if (this.waitingForOperand) {
+ this.ui.display.clear();
+ this.waitingForOperand = false;
+ }
+ this.ui.display.text += digitValue;
+}
+//! [1]
+
+Calculator.prototype.unaryOperatorClicked = function(op)
+{
+ var operand = this.ui.display.text - 0;
+ var result = 0;
+ if (op == Calculator.SQUARE_OPERATOR) {
+ if (operand < 0) {
+ this.abortOperation();
+ return;
+ }
+ result = Math.sqrt(operand);
+ } else if (op == Calculator.POWER_OPERATOR) {
+ result = Math.pow(operand, 2);
+ } else if (op == Calculator.RECIPROCAL_OPERATOR) {
+ if (operand == 0.0) {
+ this.abortOperation();
+ return;
+ }
+ result = 1 / operand;
+ }
+ this.ui.display.text = result + "";
+ this.waitingForOperand = true;
+}
+
+Calculator.prototype.additiveOperatorClicked = function(op)
+{
+ var operand = this.ui.display.text - 0;
+
+ if (this.pendingMultiplicativeOperator != Calculator.NO_OPERATOR) {
+ if (!this.calculate(operand, this.pendingMultiplicativeOperator)) {
+ this.abortOperation();
+ return;
+ }
+ this.ui.display.text = this.factorSoFar + "";
+ operand = this.factorSoFar;
+ this.factorSoFar = 0;
+ this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
+ }
+
+ if (this.pendingAdditiveOperator != Calculator.NO_OPERATOR) {
+ if (!this.calculate(operand, this.pendingAdditiveOperator)) {
+ this.abortOperation();
+ return;
+ }
+ this.ui.display.text = this.sumSoFar + "";
+ } else {
+ this.sumSoFar = operand;
+ }
+
+ this.pendingAdditiveOperator = op;
+ this.waitingForOperand = true;
+}
+
+Calculator.prototype.multiplicativeOperatorClicked = function(op)
+{
+ var operand = this.ui.display.text - 0;
+
+ if (this.pendingMultiplicativeOperator != Calculator.NO_OPERATOR) {
+ if (!this.calculate(operand, this.pendingMultiplicativeOperator)) {
+ this.abortOperation();
+ return;
+ }
+ this.ui.display.text = this.factorSoFar + "";
+ } else {
+ this.factorSoFar = operand;
+ }
+
+ this.pendingMultiplicativeOperator = op;
+ this.waitingForOperand = true;
+}
+
+Calculator.prototype.equalClicked = function()
+{
+ var operand = this.ui.display.text - 0;
+
+ if (this.pendingMultiplicativeOperator != Calculator.NO_OPERATOR) {
+ if (!this.calculate(operand, this.pendingMultiplicativeOperator)) {
+ this.abortOperation();
+ return;
+ }
+ operand = this.factorSoFar;
+ this.factorSoFar = 0.0;
+ this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
+ }
+ if (this.pendingAdditiveOperator != Calculator.NO_OPERATOR) {
+ if (!this.calculate(operand, this.pendingAdditiveOperator)) {
+ this.abortOperation();
+ return;
+ }
+ this.pendingAdditiveOperator = Calculator.NO_OPERATOR;
+ } else {
+ this.sumSoFar = operand;
+ }
+
+ this.ui.display.text = this.sumSoFar + "";
+ this.sumSoFar = 0.0;
+ this.waitingForOperand = true;
+}
+
+Calculator.prototype.pointClicked = function()
+{
+ if (this.waitingForOperand)
+ this.ui.display.text = "0";
+ if (this.ui.display.text.indexOf(".") == -1)
+ this.ui.display.text += ".";
+ this.waitingForOperand = false;
+}
+
+//! [2]
+Calculator.prototype.changeSignClicked = function()
+{
+ var text = this.ui.display.text;
+ var value = text - 0;
+
+ if (value > 0) {
+ text = "-" + text;
+ } else if (value < 0) {
+ text = text.slice(1);
+ }
+ this.ui.display.text = text;
+}
+//! [2]
+
+Calculator.prototype.backspaceClicked = function()
+{
+ if (this.waitingForOperand)
+ return;
+
+ var text = this.ui.display.text;
+ text = text.slice(0, -1);
+ if (text.length == 0) {
+ text = "0";
+ this.waitingForOperand = true;
+ }
+ this.ui.display.text = text;
+}
+
+Calculator.prototype.clear = function()
+{
+ if (this.waitingForOperand)
+ return;
+
+ this.ui.display.text = "0";
+ this.waitingForOperand = true;
+}
+
+Calculator.prototype.clearAll = function()
+{
+ this.sumSoFar = 0.0;
+ this.factorSoFar = 0.0;
+ this.pendingAdditiveOperator = Calculator.NO_OPERATOR;
+ this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
+ this.ui.display.text = "0";
+ this.waitingForOperand = true;
+}
+
+Calculator.prototype.clearMemory = function()
+{
+ this.sumInMemory = 0.0;
+}
+
+Calculator.prototype.readMemory = function()
+{
+ this.ui.display.text = this.sumInMemory + "";
+ this.waitingForOperand = true;
+}
+
+Calculator.prototype.setMemory = function()
+{
+ this.equalClicked();
+ this.sumInMemory = this.ui.display.text - 0;
+}
+
+Calculator.prototype.addToMemory = function()
+{
+ this.equalClicked();
+ this.sumInMemory += this.ui.display.text - 0;
+}