diff options
| -rw-r--r-- | examples/script/calculator/calculator.js | 107 |
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; } |