angularjs可交互的directive

directive开发上手练手，以注释的方式说明

html

<body ng-app="demo" ng-controller="demoController">

    <h3>rn-stepper demo (1/5){{rating}}</h3>

        Model value : {{ rating }}<br>

        Form Has been modified : {{ form.$dirty }}

        <hr>

    <div ng-model="rating" rn-stepper></div>

</body>

css

body {

 font-family: 'Roboto', sans-serif;

}

$stepper-height: 40px;

$stepper-value-width: 40px;

$stepper-button-width: 40px;

$stepper-border-width: 1px;

$stepper-button-bg: #4D4DFF;

$stepper-value-bg: #eee;

div[rn-stepper] {

    border:1px solid #bbb;

    display:inline-block;

    height:$stepper-height + ($stepper-border-width * 2);

    box-sizing:border-box;

    button {

        appearance:none;

        -webkit-appearance:none;

        margin:0;

        border:0;

        width: $stepper-button-width;

        height:$stepper-height;

        box-sizing:border-box;

        background: $stepper-button-bg;

        color: white;

        font-weight:bold;

        font-size:20px;

         outline: none;

        &:active {

            box-shadow: inset 0 2px 2px rgba(0, 0, 0, 0.25);

            background: darken($stepper-button-bg, 5%);

       }

    }

    div {

        vertical-align:top;

        width:$stepper-value-width;

        background:$stepper-value-bg;

        text-align:center;

        display:inline-block;

        height:$stepper-height;

        line-height:$stepper-height;

        box-sizing:border-box;

    }

}

javascript

angular.module('demo', [])

.controller('demoController',['$scope',function($scpoe){

$scpoe.rating=52;

}])

.directive('rnStepper', function() {

    return {

        restrict: 'AE',

        require:'ngModel',/*使用属性模式调用，依赖了ngModel指令*/

        scope:{},

        template: '<button ng-click="decrement()">-</button>' +

                  '<div></div>' +

                  '<button ng-click="increment()">+</button>',

        //link函数可以接受require指令的controller，ngModelController

        link:function(scope,element,attrs,ngModelController){

          //利用ngModel指令的controller我们可以利用他的方法很多事情

          ngModelController.$render=function(){

                element.find('div').text(ngModelController.$viewValue);

          };

          function updateModel(offset){

          	ngModelController.$setViewValue(ngModelController.$viewValue+offset);

            ngModelController.$render();

          };

          scope.decrement=function(){

          	updateModel(-1);

          };

          scope.increment=function(){

          	updateModel(1);

          };

        }

    };

});

angularjs可交互的directive

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angularjs可交互的directive

angularjs可交互的directive

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