Monthly Archives: November 2013

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

Select List (ng-select) – AngularJS

Hey everyone,

Just a quick post on how to do up a select list in AngularJS. This one took a bit of time to work out, particularly the display/value pairing.

HTML:

<div ng-controller="MyCtrl">
    <p>
        Status: <br />
        <select name="Status" ng-model="lesson.Status" required ng-options="status.value as status.display for status in status_options"></select>   
    </p>
</div>

JavaScript:

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var myApp = angular.module('myApp', []);
 
function MyCtrl($scope) {
    $scope.status_options = [
            { display: 'Enabled', value: 'enabled' },
            { display: 'Disabled', value: 'disabled' },
            { display: 'Deleted', value: 'deleted' }
        ];
 
    $scope.lesson = {
        BusinessId: 0,
        Description: null,
        Duration: 0,
        Price: 0,
        ProductId: 0,
        Quantity: 0,
        Start: "/Date(-62135596800000)/",
        Status: 'enabled', //Change to null in order to remove default
        Title: null,
        Type: null
    };
}

If you’re just following along, I’ve added a quick JSFiddle: http://jsfiddle.net/rtR6e/5/

You’ll notice that in the markup, the value is actually an index. This is pretty misleading, but Angular will actually assign the appropriate value to the model (“enabled”, “disabled”, etc).

Another thing that you can do fairly easily, is to remove the default value. Simply make the status null. You can test both these by outputting the JSON or using http://jsfiddle.net/rtR6e/5/.

Check out the following StackOverflow post for more info: http://stackoverflow.com/a/13808743/522859
Or the documentation: http://docs.angularjs.org/api/ng.directive:select

Suddenly Getting The EntityFramework package is not installed on project ”. – ASP.NET MVC

Hey everyone,

I am working on a small project done in ASP.NET MVC4 and started getting the following error:

The EntityFramework package is not installed on project ”.

Get-Package : Cannot validate argument on parameter ‘ProjectName’. The argument is null or empty. Supply an argument that is not null or empty and then try the command again.
At C:\Sites\LearnerLessons\packages\EntityFramework.5.0.0\tools\EntityFramework.psm1:611 char:40
+ $package = Get-Package -ProjectName <<<< $project.FullName | ?{ $_.Id -eq 'EntityFramework' } + CategoryInfo : InvalidData: (:) [Get-Package], ParameterBindingValidationException + FullyQualifiedErrorId : ParameterArgumentValidationError,NuGet.PowerShell.Commands.GetPackageCommand

The confusing thing was that I’d used it no more than an hour ago. The following StackOverflow post reveals the issue (and the fact that I should’ve read the error more carefully):

http://stackoverflow.com/a/14708897/522859

All I needed to do was select the correct project from the “Default Project” dropdown in the Package Manager Console:

The EntityFramework package is not installed on project ''

The EntityFramework package is not installed on project ”

You must call the “WebSecurity.InitializeDatabaseConnection” method before you call any other method of the “WebSecurity” class. This call should be placed in an _AppStart.cshtml file in the root of your site. – MVC4

Hey everyone,

Just another small issue I ran into while attempting to retrieve a user’s ID:

You must call the “WebSecurity.InitializeDatabaseConnection” method before you call any other method of the “WebSecurity” class. This call should be placed in an _AppStart.cshtml file in the root of your site.

Thankfully the first Google result was pretty helpful: http://stackoverflow.com/a/15864133/522859

All you need to do is remove [InitializeSimpleMembership] from the top of the AccountController and then add the following line to App_Start/AuthConfig.cs

WebSecurity.InitializeDatabaseConnection("DefaultConnection", "UserProfile", "UserId", "UserName", autoCreateTables: true);

Forcing a Link to Behave Normally – AngularJS

Hey everyone,

Another quick post. Working with AngularJS this morning I had a need for a link to redirect to a login page that was not contained within the “angular” part of the app. Unfortunately Angular was overriding the behavior and trying to route it.

The solution is fairly easy for this, simply add a target attribute:

 
<!-- Original -->
<a href='/account/login' alt='Sign In'>Sign In</a>
 
<!-- Solution -->
<a href='/account/login' alt='Sign In' target="_self">Sign In</a>

There are a few other solutions depending on your use case, check out the following StackOverflow post for more info: http://stackoverflow.com/a/16838013/522859

JSON Issue: This request has been blocked because sensitive information – MVC

Hey everyone,

Started redoing Learner Lessons in MVC4 and AngularJS today. I ran into this little issue while trying to retrieve JSON:

This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet

It turns out that this behavious is intentionally prevented in order to avoid JSON hijacking. Thankfully the data I’m working with is not at all sensitive so the workaround is pretty straight forward:

public ActionResult Index()
{
     return Json(db.Regions.ToList(), JsonRequestBehavior.AllowGet);
}

Source: http://stackoverflow.com/a/4616442/522859

For those of you working with sensitive data that don’t want to risk exposing it, posting is suggested as an alternative on StackOverflow: http://stackoverflow.com/a/6440163/522859