make the calculator example use only standard JS

__qt_sender__ is evil. Gah.

1 files changed, 62 insertions, 45 deletions

diff --git a/examples/script/calculator/calculator.js b/examples/script/calculator/calculator.js
index 62c2cba..ac3c1b6 100644
--- a/examples/script/calculator/calculator.js
+++ b/examples/script/calculator/calculator.js
@@ -1,10 +1,19 @@
+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 = "";
-    this.pendingMultiplicativeOperator = "";
+    this.pendingAdditiveOperator = Calculator.NO_OPERATOR;
+    this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
     this.sumInMemory = 0;
     this.sumSoFar = 0;
     this.factorSoFar = 0;
@@ -13,16 +22,16 @@ function Calculator(ui)
     with (ui) {
         display.text = "0";
 
-        zeroButton.clicked.connect(this, this.digitClicked);
-        oneButton.clicked.connect(this, "digitClicked");
-        twoButton.clicked.connect(this, "digitClicked");
-        threeButton.clicked.connect(this, "digitClicked");
-        fourButton.clicked.connect(this, "digitClicked");
-        fiveButton.clicked.connect(this, "digitClicked");
-        sixButton.clicked.connect(this, "digitClicked");
-        sevenButton.clicked.connect(this, "digitClicked");
-        eightButton.clicked.connect(this, "digitClicked");
-        nineButton.clicked.connect(this, "digitClicked");
+        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");
@@ -36,19 +45,28 @@ function Calculator(ui)
         setMemoryButton.clicked.connect(this, "setMemory");
         addToMemoryButton.clicked.connect(this, "addToMemory");
   
-        divisionButton.clicked.connect(this, "multiplicativeOperatorClicked");
-        timesButton.clicked.connect(this, "multiplicativeOperatorClicked");
-        minusButton.clicked.connect(this, "additiveOperatorClicked");
-        plusButton.clicked.connect(this, "additiveOperatorClicked");
-
-        squareRootButton.clicked.connect(this, "unaryOperatorClicked");
-        powerButton.clicked.connect(this, "unaryOperatorClicked");
-        reciprocalButton.clicked.connect(this, "unaryOperatorClicked");
+        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();
@@ -57,24 +75,23 @@ Calculator.prototype.abortOperation = function()
 
 Calculator.prototype.calculate = function(rightOperand, pendingOperator)
 {
-    if (pendingOperator == "+") {
+    if (pendingOperator == Calculator.PLUS_OPERATOR) {
         this.sumSoFar += rightOperand;
-    } else if (pendingOperator == "-") {
+    } else if (pendingOperator == Calculator.MINUS_OPERATOR) {
         this.sumSoFar -= rightOperand;
-    } else if (pendingOperator == "*") {
+    } else if (pendingOperator == Calculator.TIMES_OPERATOR) {
         this.factorSoFar *= rightOperand;
-    } else if (pendingOperator == "/") {
+    } else if (pendingOperator == Calculator.DIVISION_OPERATOR) {
         if (rightOperand == 0)
-        return false;
+            return false;
         this.factorSoFar /= rightOperand;
     }
     return true;
 }
 
 //! [1]
-Calculator.prototype.digitClicked = function()
+Calculator.prototype.digitClicked = function(digitValue)
 {
-    var digitValue = __qt_sender__.text - 0;
     if ((digitValue == 0) && (this.ui.display.text == "0"))
         return;
     if (this.waitingForOperand) {
@@ -85,19 +102,19 @@ Calculator.prototype.digitClicked = function()
 }
 //! [1]
 
-Calculator.prototype.unaryOperatorClicked = function()
+Calculator.prototype.unaryOperatorClicked = function(op)
 {
     var operand = this.ui.display.text - 0;
     var result = 0;
-    if (__qt_sender__.text == "Sqrt") {
+    if (op == Calculator.SQUARE_OPERATOR) {
         if (operand < 0) {
             this.abortOperation();
             return;
         }
         result = Math.sqrt(operand);
-    } else if (__qt_sender__.text == "x^2") {
+    } else if (op == Calculator.POWER_OPERATOR) {
         result = Math.pow(operand, 2);
-    } else if (__qt_sender__.text == "1/x") {
+    } else if (op == Calculator.RECIPROCAL_OPERATOR) {
         if (operand == 0.0) {
             this.abortOperation();
             return;
@@ -108,11 +125,11 @@ Calculator.prototype.unaryOperatorClicked = function()
     this.waitingForOperand = true;
 }
 
-Calculator.prototype.additiveOperatorClicked = function()
+Calculator.prototype.additiveOperatorClicked = function(op)
 {
     var operand = this.ui.display.text - 0;
 
-    if (this.pendingMultiplicativeOperator.length != 0) {
+    if (this.pendingMultiplicativeOperator != Calculator.NO_OPERATOR) {
         if (!this.calculate(operand, this.pendingMultiplicativeOperator)) {
             this.abortOperation();
             return;
@@ -120,10 +137,10 @@ Calculator.prototype.additiveOperatorClicked = function()
         this.ui.display.text = this.factorSoFar + "";
         operand = this.factorSoFar;
         this.factorSoFar = 0;
-        this.pendingMultiplicativeOperator = "";
+        this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
     }
 
-    if (this.pendingAdditiveOperator.length != 0) {
+    if (this.pendingAdditiveOperator != Calculator.NO_OPERATOR) {
         if (!this.calculate(operand, this.pendingAdditiveOperator)) {
             this.abortOperation();
             return;
@@ -133,15 +150,15 @@ Calculator.prototype.additiveOperatorClicked = function()
         this.sumSoFar = operand;
     }
 
-    this.pendingAdditiveOperator = __qt_sender__.text;
+    this.pendingAdditiveOperator = op;
     this.waitingForOperand = true;
 }
 
-Calculator.prototype.multiplicativeOperatorClicked = function()
+Calculator.prototype.multiplicativeOperatorClicked = function(op)
 {
     var operand = this.ui.display.text - 0;
 
-    if (this.pendingMultiplicativeOperator.length != 0) {
+    if (this.pendingMultiplicativeOperator != Calculator.NO_OPERATOR) {
         if (!this.calculate(operand, this.pendingMultiplicativeOperator)) {
             this.abortOperation();
             return;
@@ -151,7 +168,7 @@ Calculator.prototype.multiplicativeOperatorClicked = function()
         this.factorSoFar = operand;
     }
 
-    this.pendingMultiplicativeOperator = __qt_sender__.text;
+    this.pendingMultiplicativeOperator = op;
     this.waitingForOperand = true;
 }
 
@@ -159,21 +176,21 @@ Calculator.prototype.equalClicked = function()
 {
     var operand = this.ui.display.text - 0;
 
-    if (this.pendingMultiplicativeOperator.length != 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 = "";
+        this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
     }
-    if (this.pendingAdditiveOperator.length != 0) {
+    if (this.pendingAdditiveOperator != Calculator.NO_OPERATOR) {
         if (!this.calculate(operand, this.pendingAdditiveOperator)) {
             this.abortOperation();
             return;
         }
-        this.pendingAdditiveOperator = "";
+        this.pendingAdditiveOperator = Calculator.NO_OPERATOR;
     } else {
         this.sumSoFar = operand;
     }
@@ -234,8 +251,8 @@ Calculator.prototype.clearAll = function()
 {
     this.sumSoFar = 0.0;
     this.factorSoFar = 0.0;
-    this.pendingAdditiveOperator = "";
-    this.pendingMultiplicativeOperator = "";
+    this.pendingAdditiveOperator = Calculator.NO_OPERATOR;
+    this.pendingMultiplicativeOperator = Calculator.NO_OPERATOR;
     this.ui.display.text = "0";
     this.waitingForOperand = true;
 }