Archive for the ‘jQuery’ Category
jQuery Org Chart – a plugin for visualising data in a tree-like structure
jQuery OrgChart is a plugin that allows you to render structures with nested elements in a easy-to-read tree structure. To build the tree all you need is to make a single line call to the plugin and supply the HTML element Id for a nested unordered list element that is representative of the data you’d like to display. Features include:
- Very easy to use given a nested unordered list element.
- Drag-and-drop reorganisation of elements.
- Showing/hiding a particular branch of the tree by clicking on the respective node.
- Nodes can contain any amount of HTML except
<li>and<ul>. - Easy to style.
Expected Markup & Example Usage
All documentation can be found on github.
Demo
You can view a demo of this here.
Sourcecode
Source code with an example is available here.
Salesforce: A better way to work with jQuery selectors and Visualforce Component Ids
Irregular Expressions
I get very sad when discussing this particular topic. There are a variety of ways of get Visualforce component Ids and using them in JavaScript but all of them keep me awake at night. Srsly. A commenter on one of my posts got me thinking about how we can do this better and I’ve come up with a way that I think is great. Hopefully you’ll agree.
This post means that my older posts here and here are now retired in favour of this method.
If the world was on the brink of nuclear war with no clear path to peace what could you count on to save the day? Regular Expressions of course. If a meteor the size of Pluto was about to crash into Earth and Bruce Willis was too old to land on it and blow it up what could we count on to rid us of the troublesome rock. Yes that’s right, Regular Expressions. I think you can guess where I’m going with this.
jQuery has the ability to understand very simple regular expressions in it’s attribute selectors. The full documentation can be found here.
To solve our particular problem however the code is simple:
<apex:page>
<head>
<style>
a,span{
display:block;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script>
jQuery(document).ready(function($){
$('#btn').click(function(e){
e.preventDefault();
console.log('The following element was found when looking for an id of \'output1\':');
console.log($('[id$=output1]')); /* Here's where we're grabbing the element. */
});
});
</script>
</head>
<apex:outputText value="She sells seashells by the seashore." id="output1"/>
<apex:outputText value="Peter Piper picked a pack of pickled peppers." id="output2"/>
<a href="" id="btn">Click me.</a>
</apex:page>
The important part here is the selector $(‘[id$=output1]’) which says, “Find the id value that ends with ‘output1′”. This comes with a warning though! Do not duplicate the Visualforce Id that you give to your elements otherwise this piece of code will find all of them.
When I first wrote this post I used a selector extension library that gives you the full power of JavaScript-based regular expression but Ryan Fritts has rightly shown that the above will deal with 99% of use cases and is simpler. For those of you that need to deal with the extra 1% I’ve implemented a wrapper to regex selector as an example. It does exactly what jQuery is doing above and gives you access to the regex flags as documented here.
Thanks again Ryan!
Across the Pond with Jason Venable aka TehNrd
The face of TehNrd
Today I start a series of posts that’ll appear here and on the Tquila blog. The series will be in the format of Q&A with some of the finest Salesforce.com and Force.com evangelists, admins and developers. I’m starting with Jason Venable aka TehNrd and I’ll let him introduce himself.
Q: Tell me a bit about yourself. How long have you worked with the CRM vs the Force.com Platform? Were you always a developer?
A: My name is Jason Venable. I am 27 years old. I live in Seattle, Washington, USA. Oh, wait, you want something more interesting, got it. I’ve been working with salesforce.com CRM for a little over 4 years. Three of these years have also been working with force.com. All of this time has been administering and developing for a large enterprise salesforce.com deployment at F5 Networks. A lot of what I do is merging the two worlds of salesforce.com and force.com to meet business needs. This includes using all of the features force.com has to offer including, custom objects, validation rules, Apex code triggers, Visualforce pages, and web services to enhance and improve our companies use of salesforce.com.
Have I always been a developer? Heck no! If you told me I’d be doing coding and web app development 4 years ago I would have laughed at you. College classes that had me coding in notepad and some not so great experiences with the now dead s-controls left a bad taste in my mouth when it came to development. Then salesforce.com released Apex code and I saw how it could solve some of the problems we where facing. I taught myself the basics and the rest is history.
I also have a little blog related to all sorts of force.com goodness at tehnrd.com and some people follow around @TehNrd in Twitterland.
Q: What is your favourite type of development on the platform? What piece of work are you most proud of?
A: Databases design, triggers, and workflow are all cool but what I really like is building snazzy web apps. This has become even funner after jumping on the jQuery and jQueryUI bandwagon (disclaimer: I am a major jQuery fanboy). These JavaScript libraries allow you to make rich web apps with animations, drag & drop, and all sorts of other slick effects with minimal code. Pair this with Visualforce and the force.com database and you’ve got yourself a recipe for some great awesomesauce applications.
I think the coolest thing I’ve ever built on force.com was Gameforce. If anyone from salesforce.com reads this please don’t sue me for stealing your naming convention. Gameforce is a site built with force.com where you can play games. There is a single player black jack card game but what I think is even cooler is multiplayer Connect 4 and what I mean by multiplayer is two people on separate computers anywhere in the world. What I’m really proud of is this site is pure force.com. There is no flash, JavaScript, or any other tricks to handle the multiplayer game. You can check it out here.
Q: Where do you think “The Cloud” is headed?
A: I won’t even pretend to be the first person to say or think this, you talked about it here: http://tquilamockingbird.wordpress.com/2011/03/15/salesforce-com-crm-vs-oracle-ondemand/
But I really believe the younger generation will push adoption of the cloud to the next level. The CTOs and CEOs of today pick “the cloud” because it’s easy to manage, cheaper, and scalable. The CTOs and CEOs of tomorrow will choose cloud solutions for these same reasons but also because they know nothing else. Kids today use “the cloud” every day but don’t even realize it. Webmail, google docs, and mobile me to name a few. How many people under 20 use a local web client to check their personal mail, probably 3. How many people under 20 upload every picture they take to Flickr or Facebook and then don’t worry about the local copy, a lot. When it is time for these kids to choose solutions that solve business problems they will look to “the cloud” without even realizing “the cloud” is something new and useful. To them it will be their norm and the way things have always been.
Q: Which of the Spice Girls do you most closely identify with?
A: Of course the one living in UK has to work in a Spice Girls question. A secret fan you are perhaps? I’m not that scary and I’m not a baby. I don’t have red hair and I haven’t played organized sports in over 9 years. So in some strange way I think I just identified myself as relating the closest to Posh spice. Oh boy, I’m not going to be able to live this one down. I’m definitely not snobby or upscale but the other day someone said I had cool shoes so I guess that makes me stylish and poshy? Posh Dev!
Q: What advice do you have for beginners on the Force.com platform?
A: For beginners the Force.com Workbooks are a great resource. http://wiki.developerforce.com/index.php/Forcedotcomworkbook I am super jealous these didn’t exist when I first started. They are clear, concise, and walk you through the steps of building a full blown application. I also hear pretty good things about the Salesforce Handbook. apparently two guys that know a thing or two about salesforce.com and force.com development wrote it. The forums at developer.force.com are also a great place to hang out. When I first started doing force.com development the forums where the only resource available and the community helped me solve problems that ranged from the “simple face palm I can’t believe it was that easy” problems to the “holy smokes there is no way on earth I would have ever figured this out on my own” problems.
Q: Do you by any chance know of a better way to peel an orange?
A: Funny you ask because I actually do know the most superior method in the entire universe on how to consume an orange… http://www.tehnrd.com/the-best-way-to-eat-an-orange/
Client-Side VisualForce Pagination with Pajinate
Pajinated DataTable
Pagination is an essential, and not so easy to implement user interface device that allows the developer to break long lists of items, or one very long item into sub-pages. I love the challenge that pagination brings (who doesn’t really) when developing efficient and reusable server-side code, but this article isn’t about that. Sometimes I need things done quickly, easily, and preferably with as little compromise as possible, and that’s what client-side pagination is all about. Read the rest of this entry »
Pajinate – A jQuery Pagination Plugin
Pajinate is a simple and flexible jQuery plugin that allows you to divide long lists or areas of content into multiple separate pages. Not only is it a simpler alternative to server-side implementations, the time between paginated-page loads is almost nil (up to a reasonable page-size of course).
Pajinate - A pagination plugin the whole family can enjoy!
Read the rest of this entry »
Salesforce Form Validation Enhanced
I have a dream, and in this dream form-validation is not a chore. All the nasty work is done client-side, and we – the developers – control what an error message says and where it says it! Server-side validation?! Pah, I spit in it’s general direction (but only if no ladies are present). I don’t need or want client-server round-trips.. I want speed, I want beauty, I want control; and I think you do too.
Our end goal: A neat, realtime, client-side validation technique for VisualForce.
Using either inputFields, Apex exception handling and/or the ‘required’ attribute in VisualForce, we have a number of mechanisms to deal with form-validation, but if we’re honest with ourselves, they’re the ten-thousands-spoons when all we need is a knife. I know you’ve heard me singing it’s praise from the rooftops, but yet again, jQuery is here to save the day. Read the rest of this entry »
VisualForce Element Ids in jQuery selectors
I have retired this approach in favour of a much neater solution that can be found here.
This tricky topic had me puzzled for some time and in earlier posts I went the way of using CSS classes to identify DOM elements; but was always a touch dissatisfied with the solution. Not only is it less efficient – valid XHTML pages should only have one element with any Id, although CSS classes can be shared by many elements – but it also feels all hacky ‘n stuff. I’m a bit older now, a bit more experienced and I RTFM. Without further ado, here is why it’s tricky, and how to fix it. Read the rest of this entry »
Masking Input on VisualForce Pages
I am a developer and (at least as often) a (l)user. UI and UX design are important from both perspectives, and it’s important to bear this in mind whilst creating any application. What is this waffle all about? There are some platforms, based in yonder cloud that could tweak the tiniest of features, and make the lives of their users (and administrators) 1 x shed-load better. Until they do that, we’re gonna have to do it ourselves.
Let’s get specific. Typically, validation error messages provided by Apex and VisualForce are only apparent after form is submitted ( or when we’re on the last page of a 39-page wizard ). Of course some cases require that it be this way, but for other cases it’s like my (very) old professor used to say, “Jus’ don’t let em make the mistake in the first place boy *tongue-click*”. Heeding Prof. Swart’s advice, let’s see how we can easily do this. Read the rest of this entry »
Flickr + jQuery + Salesforce = Awesome^5 [Part 2]
Okay software developing enthusiasts, I’m back from Paris (you didn’t know I was gone did ya?), I’m a year older and culturally, I’m richer (well I’d like to think so at least). It’s time to complete our two-part series on integrating disparate systems using the most-excellent combination of web services, jQuery and the Force.com platform. In part 1 we learnt how to connect to a third-party endpoint (Flickr in our case), and consume their SOAP-based web services. Now we’re going to jazz it all up with our spiffy jQuery gallery carousel. Let’s have another look at where we want to be at the end of this all,
The Silver Lining 