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AngularJS directive that allows you to subtract money from a total amount in pounds or percentages
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| <html ng-app="app"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="http://cdnjs.cloudflare.com/ajax/libs/mathjs/1.0.1/math.js"></script> | |
| </head> | |
| <body ng-controller="MoneyController as ctrl"> | |
| <p> | |
| Total: <input type="number" ng-model="ctrl.total"> | |
| </p> | |
| <p> | |
| <number-percentage amount="ctrl.amount1" total="ctrl.total" notify="ctrl.notify"></number-percentage> | |
| </p> | |
| <p> | |
| <number-percentage amount="ctrl.amount2" total="ctrl.total" notify="ctrl.notify"></number-percentage> | |
| </p> | |
| <p> | |
| <number-percentage amount="ctrl.amount3" total="ctrl.total" notify="ctrl.notify"></number-percentage> | |
| </p> | |
| <p> | |
| Running Total: {{ctrl.runningTotal | currency:"£ "}} | |
| </p> | |
| </body> | |
| </html> |
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| function MoneyController() { | |
| var self = this; | |
| self.amount1 = 0; | |
| self.amount2 = 0; | |
| self.amount3 = 0; | |
| self.total = 5000; | |
| self.runningTotal = 0; | |
| self.notify = function() { | |
| self.runningTotal = self.total - self.amount1 - self.amount2 - self.amount3; | |
| } | |
| } | |
| function NumberPercentage() { | |
| return { | |
| restrict: 'E', | |
| template: '£ <input type="number" min="0" max="{{total}}" ng-model="amount" ng-blur="amountChanged()"><input type="number" ng-model="asPercent" min="0" max="100" ng-blur="percentageChanged()">%', | |
| scope: { | |
| amount: '=', | |
| total: '=', | |
| notify: '=' | |
| }, | |
| controller: function($scope, $timeout) { | |
| $scope.asPercent = 0; | |
| $scope.amountChanged = function() { | |
| if ($scope.total > 0) { | |
| $scope.asPercent = math.round(($scope.amount * 100) / $scope.total, 3); | |
| $timeout(function() { | |
| $scope.notify(); | |
| }); | |
| } | |
| }; | |
| $scope.percentageChanged = function() { | |
| $scope.amount = math.round(($scope.asPercent / 100) * $scope.total, 3); | |
| $timeout(function() { | |
| $scope.notify(); | |
| }); | |
| }; | |
| $scope.$watch('total', function() { | |
| if ($scope.total > 0) { | |
| $scope.asPercent = math.round(($scope.amount * 100) / $scope.total, 3); | |
| } | |
| }); | |
| } | |
| } | |
| } | |
| angular.module('app', []) | |
| .controller('MoneyController', MoneyController) | |
| .directive('numberPercentage', NumberPercentage); |
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