Tag Archives: Directives

Random Class Directive – AngularJS

Hey everyone,

Just another small directive. This one adds a random class from the provided array to the element.

Check out this fiddle to see the demo: http://jsfiddle.net/uvSVj/3/

Random Background Directive

Random Background Directive

I used this directive to add a random background to each of my wrapper divs:

Random Background Real World Usage

To use it in your app simply define a list of classes in your controller:

app.controller("MyCtrl", function MyCtrl($scope) {
 
    /* A random class is picked from this list */
    $scope.classes = [
        //"bg-buildings",
        "red",
        "blue",
        "yellow",
        "green",
        "orange",
        "black",
        "purple"
    ];        
});

Then add the directive to your page (can be an existing element):

<div class="test" ng-random-class ng-classes="classes"></div>

A random class will then be selected from the list and appended to the elements current list of classes (if any).

The easiest way to see how it’s done is probably just to check out the fiddle above, but there’s a code dump below if you need it:

The Random Class Directive

app.directive("ngRandomClass", function () {
    return {
        restrict: 'EA',
        replace: false,
        scope: {
            ngClasses: "="
        },
        link: function (scope, elem, attr) {            
 
            //Add random background class to selected element
            elem.addClass(scope.ngClasses[Math.floor(Math.random() * (scope.ngClasses.length))]);
        }
    }
});

Sample Html

<div ng-app="myApp">
    <!--Shameless link back to blog -->
    <h1>Random Class Directive</h1>
    <a href='http://www.whatibroke.com/?p=899'>www.whatibroke.com</a>
 
    <!-- Identical divs with random class directive added -->
    <div ng-controller="MyCtrl">
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
        <div class="test" ng-random-class ng-classes="classes">
        </div>
    </div>
</div>

Sample JS

/* 
    http://www.whatibroke.com/?p=899
    Adds a random class to element
    Usage: add ng-random-class to element
*/
 
var app = angular.module('myApp', []);
 
app.controller("MyCtrl", function MyCtrl($scope) {
 
    /* A random class is picked from this list */
    $scope.classes = [
        //"bg-buildings",
        "red",
        "blue",
        "yellow",
        "green",
        "orange",
        "black",
        "purple"
    ];        
});

Sample Styles

/* Just a demo div */
.test{
    width: 50px;
    height: 50px;
    margin: 10px;
    padding: 5px;
    float: left;   
    -webkit-transition: 400ms linear all;
	-moz-transition: 400ms linear all;
	-ms-transition: 400ms linear all;
	-o-transition: 400ms linear all;
	transition: 400ms linear all;
    cursor: pointer;
    border-radius: 10px;    
}
 
.test:hover{
    opacity: 0.8;    
}
 
body{
	background-color: #F0F0F0;
	font-family: "Lato", sans-serif;
	font-weight: 300;
	color: #363636;
    text-align: center;
    vertical-align: middle;
}
 
/* Random classes */
.red {
    background-color: red !important;
    height: 75px;
    width: 75px;
}
 
.blue {
    background-color: blue !important;
    height: 40px;
    width: 40px;
}
 
.yellow {
    background-color: yellow !important;
    height: 20px;
    width: 20px;
}
 
.green {
    background-color: green !important;
    height: 63px;
    width: 63px;
}
.purple {
    background-color: purple !important;
    height: 82px;
    width: 82px;
}
.black {
    background-color: black !important;
    height: 29px;
    width: 29px;
}
.orange {
    background-color: orange !important;
    width: 42px;
    height: 42px;
}

Let me know if you run into any issues and feel free to use/change however you want.

TimeSelector / TimePicker Directive – AngularJS

Hey everyone,

I’ve been mucking around with directives for that last few days and one of my requirements has been a simple timepicker. Nothing too fancy, but if anyone would like to use it – feel free.

See the following fiddle for the demo: http://jsfiddle.net/LFB3F/2/

Timepicker Directive

Timepicker Directive

The directive is initialised with both the hour and minute defaults being set like this:

<ng-time-selector hours="hours" minutes="minutes"></ng-time-selector>

Note that hours and minutes should be set in the controller that wraps around the Timepicker:

app.controller("MyCtrl", function MyCtrl($scope) {
    $scope.hours = 11;
    $scope.minutes = 45;       
});

The hours and minutes will then be updated whenever the user changes the value. If you need any other hooks it’s fairly easy to modify and there are a heap of comments.

You may also want to put the HTML in an external template. Just make the following changes to the directive (note templateURL):

app.directive("ngTimeSelector", function () {
    return {
        restrict: 'EA',
        templateUrl: '/Directives/TimeSelector',
        scope: {
            hours: "=",
            minutes: "="
        },
        replace: true,
        link: function (scope, elem, attr) {
...
...

The JSFiddle is probably the easiest way to see how it all works. You can simply copy it from there to your app. Alternatively, I’ve dumped the code below:

Uncondensed HTML (for those who prefer to use a template)

<div class="timeSelectorDirective"> 
    <div class="section hours">
        <div class="increase" ng-click="increaseHours()">
            <i class="icon fa fa-caret-up"></i>
        </div>
        <div class="display">
            {{displayHours()}}
        </div>        
         <div class="decrease" ng-click="decreaseHours()">
            <i class="icon fa fa-caret-down"></i>
        </div>
    </div>
    <div class="section minutes">
        <div class="increase" ng-click="increaseMinutes()">
            <i class="icon fa fa-caret-up"></i>
        </div>
        <div class="display">
            {{displayMinutes()}}
        </div>        
         <div class="decrease" ng-click="decreaseMinutes()">
            <i class="icon fa fa-caret-down"></i>
        </div>
    </div>    
    <div class="section hours">
        <div class="increase" ng-click="switchPeriod()">
            <i class="icon fa fa-caret-up"></i>
        </div>
        <div ng-if="hours >= 12" class="display">
            PM
        </div>
        <div ng-if="hours < 12" class="display">
            AM
        </div>   
         <div class="decrease" ng-click="switchPeriod()">
            <i class="icon fa fa-caret-down"></i>
        </div>
    </div>
</div>

Timepicker Directive

/* 
    http://www.whatibroke.com/?p=899
*/
 
var app = angular.module('myApp', []);
 
app.controller("MyCtrl", function MyCtrl($scope) {
    $scope.hours = 11;
    $scope.minutes = 45;       
});
 
 
app.directive("ngTimeSelector", function () {
    return {
        restrict: 'EA',
        template: '<div class="timeSelectorDirective"> <div class="section hours"> <div class="increase" ng-click="increaseHours()"> <i class="icon fa fa-caret-up"></i> </div> <div class="display"> {{displayHours()}} </div> <div class="decrease" ng-click="decreaseHours()"> <i class="icon fa fa-caret-down"></i> </div> </div> <div class="section minutes"> <div class="increase" ng-click="increaseMinutes()"> <i class="icon fa fa-caret-up"></i> </div> <div class="display"> {{displayMinutes()}} </div> <div class="decrease" ng-click="decreaseMinutes()"> <i class="icon fa fa-caret-down"></i> </div> </div> <div class="section hours"> <div class="increase" ng-click="switchPeriod()"> <i class="icon fa fa-caret-up"></i> </div> <div ng-if="hours >= 12" class="display"> PM </div> <div ng-if="hours < 12" class="display"> AM </div> <div class="decrease" ng-click="switchPeriod()"> <i class="icon fa fa-caret-down"></i> </div> </div> </div>',
        scope: {
            hours: "=",
            minutes: "="
        },
        replace: true,
        link: function (scope, elem, attr) {
 
            //Create vars
            scope.period = "AM";
 
            /* Increases hours by one */
            scope.increaseHours = function () {
 
                //Check whether hours have reached max
                if (scope.hours < 23) {
                    scope.hours = ++scope.hours;
                }
                else {
                    scope.hours = 0;
                }
            }
 
            /* Decreases hours by one */
            scope.decreaseHours = function () {
 
                //Check whether hours have reached min
                scope.hours = scope.hours <= 0 ? 23 : --scope.hours;
            }
 
            /* Increases minutes by one */
            scope.increaseMinutes = function () {
 
                //Check whether to reset
                if (scope.minutes >= 59) {
                    scope.minutes = 0;
                }
                else {
                    scope.minutes++;
                }
            }
 
            /* Decreases minutes by one */
            scope.decreaseMinutes = function () {
 
                //Check whether to reset
                if (scope.minutes <= 0) {
                    scope.minutes = 59;
                }
                else {
                    scope.minutes = --scope.minutes;
                }
            }
 
 
            /* Displays hours - what the user sees */
            scope.displayHours = function () {
 
                //Create vars
                var hoursToDisplay = scope.hours;
 
                //Check whether to reset etc
                if (scope.hours > 12) {
                    hoursToDisplay = scope.hours - 12;
                }                
 
                //Check for 12 AM etc
                if (hoursToDisplay == 0) {
 
                    //Set to am and display 12
                    hoursToDisplay = 12;
                }
                else {
 
                    //Check whether to prepend 0
                    if (hoursToDisplay <= 9) {
                        hoursToDisplay = "0" + hoursToDisplay;
                    }
                }
 
                return hoursToDisplay;
            }
 
            /* Displays minutes */
            scope.displayMinutes = function () {
                return scope.minutes <= 9 ? "0" + scope.minutes : scope.minutes;
            }
 
            /* Switches the current period by ammending hours */
            scope.switchPeriod = function () {
                scope.hours = scope.hours >= 12 ? scope.hours - 12 : scope.hours + 12;
            }
        }
    }
});

Styles

body{
	background-color: #F0F0F0;
	font-family: "Lato", sans-serif;
	font-weight: 300;
	color: #363636;
}
 
.timeSelectorDirective {
    background: none;
    -webkit-user-select: none;      
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
}
.timeSelectorDirective .increase, .timeSelectorDirective .decrease{
    text-align: center;
    vertical-align: middle;    
    color: rgb(112, 112, 112);    
    text-shadow: 0px 1px #FFF;
    cursor: pointer;
    -webkit-transition: 500ms ease-out all;
    -moz-transition: 500ms ease-out all;
    -ms-transition: 500ms ease-out all;
    -o-transition: 500ms ease-out all;
    transition: 500ms ease-out all;
    font-size: 100%;
    border: 1px solid #CCC;
    padding: 3px;
    margin: 3px;
    border: 1px solid #EDE;
}
 
.timeSelectorDirective .increase:hover, .timeSelectorDirective .decrease:hover{
    color: rgba(112, 112, 112, 0.5);   
    border-color: #CCC;
    background-color: #FFF;
}
 
.timeSelectorDirective .increase:active, .timeSelectorDirective .decrease:active{
    color: rgb(112, 112, 112);
    box-shadow: inset 1px 1px 1px #DDD;
}
 
.timeSelectorDirective .section{
    display: inline-block;
}
 
.timeSelectorDirective .display{
    background-color: rgb(247, 247, 247);
    color: #555555;
    padding: 5px;
    margin: 0px 3px;
    min-width: 30px;
    text-align: center;
    border: 1px solid #DDD;
    box-shadow: 1px 1px 1px #FFFFFF;
}

Sample Usage

<div ng-app="myApp">
    <h1><a href='http://www.whatibroke.com/?p=899'>www.whatibroke.com</a></h1>
 
    <div ng-controller="MyCtrl" style="margin-top:40px;">
        <b>Hours: </b>{{hours}} &nbsp;
        <b>Minutes: </b>{{minutes}}
        <ng-time-selector hours="hours" minutes="minutes"></ng-time-selector>
    </div>
</div>

Misc Includes
AngularJS: http://ajax.googleapis.com/ajax/libs/angularjs/1.1.5/angular.js
FontAwesome: http://netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css
Font: http://fonts.googleapis.com/css?family=Lato:300,300italic,400,700,700italic|Rokkitt:400,700.css

Passing Parameters from a Directive to a Function – AngularJS

Hey everyone,

This is just a quick post to help out anyone who runs into the same problems with directives that I did today. I was able to call the controllers function from the directive, however none of the parameters were being passed.

The issue ended up being that the parameters need to be named. For instance:

 <ng-planner lessons="plannerLessons" lesson-clicked="editLesson(lesson)" add-lesson="newLesson()" business="true"></ng-planner>
app.directive('ngPlanner', function () {
    return {
        restrict: 'EA',
        templateUrl: '/Businesses/PlannerDirective',
        scope: {
            lessons: "=",
            business: "=",
            lessonClicked: "&",
            addLesson: "&"
        },
        replace: true,
        link: function (scope, elem, attr) {
            var selectedIndex = null;
 
            console.log(scope);
            console.log(scope.lessons);
            scope.test = function (tester) {
                selectedIndex = tester;
                console.log("Directive: " + selectedIndex);
                scope.lessonClicked({ lesson: selectedIndex });
            }
        }
    }
});
 
/* Used for handling business details, planner, etc */
app.controller("BusinessDetailsController", function ($scope) {
 
    //Fired when the new lesson button is clicked in the planner directive
    $scope.newLesson = function (date) {
        console.log("New Lesson Clicked: " + date);
    }
 
    //Fired when a lesson is clicked on
    $scope.editLesson = function (lesson) {
        console.log("Lesson Clicked: " + lesson);
    }
});

Note particularly the scope.lessonClicked line. Instead of passing parameters normally, they should be named (scope.lessonClicked({lesson: selectedIndex}).

The naming should match that used in the HTML where your directive is added:
<ng-planner lessons=”plannerLessons” lesson-clicked=”editLesson(lesson)” add-lesson=”newLesson()” business=”true”></ng-planner>

A huge thanks to Jay B for posting the solution on the AngularJS groups page: https://groups.google.com/forum/#!topic/angular/3CHdR_THaNw

He’s also added the following JSFiddle: http://jsfiddle.net/simpulton/VJ94U/

And although pretty well hidden, it is actually mentioned in the documentation: http://docs.angularjs.org/guide/directive