### Jquery Mobile Form - Text inputs

In this post on "form text input's" styling and usage using Jquery Mobile we will cover various input types and textarea styling using JQM. We will also cover the various attributes that can be used with the input types. Text inputs and textareas are coded with standard HTML elements, then enhanced by Jquery Mobile to make them more attractive and useable on a mobile device.

The text input elements are available in 2 flavors/sizes - regular and mini. Following is a standard HTML syntax for an input element.

Adding a data attribute data-mini="true" to the input tag renders a smaller sized input element. Let's take a look at the code sample below to understand the working in a better way.

Apart from the regular input type, to accept multi-line input, use the textarea element. The advantage of using textarea in Jquery Mobile is that, the framework auto grows the height of the textarea, avoiding the need for the content in the textarea to be scrolled internally. In the example below, you will see to implementations of textareas - one with label and textarea on 2 separate lines and the other with the label and textarea on the same line.

In the code above, you will see 4 different implementations of the input element. The first one is a regular input of type text with the label and the textbox one below the other. The second implementation is exactly similar to the first implementation with the only difference of the added data attribute "data-mini="true"" which reduces the size (basically height) of the textbox.

The third implementation gets the label and the textbox on the same line. This implementation is done using a div with data attribute data-role="fieldcontain" around the label and input tags. This div has to be within a form tag. Maintaining the HTML structure is very important when using JQuery Mobile framework.

In the fourth implementation, we have used the HTML5 placeholder property and done away with the label completely. However, for the sake of accessibility, we have included the label tag with class="ui-hidden-accessible" so that the label is not displayed but is present in the HTML structure. This implementation is popularly used on mobile sites as this reduces the amount of scroll.

To disable the input field just add the keyword "disabled" to the input tag and your input type would be disabled.

A note on accessibility:
For the sake of accessibility, jQuery Mobile requires that all form elements be paired with a meaningful label. To hide labels in a way that leaves them visible to assistive technologies — for example, when letting an element's placeholder attribute serve as a label — apply the helper class ui-hidden-accessible to the label itself. While the label will no longer be visible, it will be available to assisitive technologies such as screen readers.

You can use the various input types supported in HTML5. The advantage of using the HTML5 input types is that keybords default to the particular input type are displayed by default. The following example demonstrates the various HTML5 input types that you can use. Try out the example on a mobile device and you will see for yourself the various keyboards that default the particular input type.

The mobile browsers that do not support the new HTML5 input types will fall back to the default input type="text" and show the default alpha-numeric keyboard. Adding the images (screenshots) of default keyboards displayed for different input types on the Android and iOS devices, to this post would make the post really long and so I have included these images here.

Hope this post has been informative to you and helps you use the various input types effectively in your next Jquery Mobile based application. Drop a comment to let me know what you feel about this post as well as the earlier series on Jquery Mobile listview. Share the post if is has helped you, so that maximum developers benefit from this one. Till next time, happy coding!

### Geodesic Polyline

Today we will have a look at a very interesting polyline example - "The geodesic polyline". Now the first question that will pop is "What is geodesic?". Mathematically, geodesic means the shortest line between two points on a mathematically defined surface, as a straight line on a plain or an arc of a great circle or sphere.

The next question after reading the above definition is clearly, "Why do we need geodesic polylines?" and that would be followed up with "What is this Great Circle?". We will discuss this first, before we move on to the actual example today. The example is very very similar to the normal polyline example, with just a small change.

Having said so, I will now try to explain why we need a geodesic polyline? The shortest distance between two locations on the earth is rarely a straight line as the earth is roughly spherical in nature. So any two points on the earth, even if they are very close lie on a curve and not …

### Where does Google get it's live traffic data from?

Referring to a post that I wrote earlier, Google’s - Live traffic Layer, ever wondered how Google collected this data? I was wondering the other day, how Google received live data to display it on their maps as a layer! I looked up the web and found something very interesting and am sharing the same with you all.As we all know, the traffic layer is available most accurately in several states in USA. Most major metro areas in the US have sensors embedded in their highways. These sensors track real time traffic data. Easy to miss at high speeds (hopefully anyway, traffic permitting), more commonly noticed may be the similar sensors that often exist at many busy intersections that help the traffic lights most efficiently let the most amount of people through. The information from these tracking sensors is reported back to the Department of Transportation (DOT). The DOT uses this data to update some of the digital signs that report traffic conditions in many metro areas. They also…

### Difference between word-break: break-all versus word-wrap: break-word

The 2 CSS properties word-break: break-all and word-wrap: break-word appear to work in the same way or generate the same output, but there is a slight difference between the 2 and we will be discussing these differences today.

Take a look at the example above. The difference is quite evident, however I will try to explain it further.

word-break: break-all Irrespective of whether it’s a continuous word or many words, break-all breaks them up at the edge of the width limit even within the characters of the same word
word-wrap: break-word This will wrap long words onto the next line.break-word adjusts different words so that they do not break in the middle.
So if you have many fixed-size spans which get content dynamically, you might just prefer using word-wrap: break-word, as that way only the continuous words are broken in between, and in case it’s a sentence comprising many words, the spaces are adjusted to get intact words (no break within a word).     In case you want to exp…

### Ground Truth - How Google Builds Maps

Todays's article is cross posted from The Atlantic's Tech section. The article was posted by Alexis Madrigal who is a senior editor at The Atlantic, where he oversees the Technology channel. So, thanks to The Atlantic and Alexis Madrigal, we will have an exclusive look inside Ground Truth, the secretive program to build the world's best accurate maps.

Behind every Google Map, there is a much more complex map that's the key to your queries but hidden from your view. The deep map contains the logic of places: their no-left-turns and freeway on-ramps, speed limits and traffic conditions. This is the data that you're drawing from when you ask Google to navigate you from point A to point B -- and last week, Google showed me the internal map and demonstrated how it was built. It's the first time the company has let anyone watch how the project it calls GT, or "Ground Truth," actually works.
Google opened up at a key moment in its evolution. The co…

### Two maps on the same page - Side-by-side

How good I am feeling to post a code example after such a long time! It's been all "news" over the past so many posts! Well now that I am finally doing a code example, I am posting a very highly requested code sample. Placing two Google Maps on the same page (Now that's simple you would say!), but side by side. Now this is the thing that most people struggle with. Well, implementing the second part is also very simple, as you will see in today's code.

Let's see the code. Here it is!

The output of the above code will be as seen in the result section above.

As most of you will realize, there are two maps, one centered at "Pune" and other at "Noida". Why I chose these two locations? Well, just like that!...The main issue of concern is how the maps appeared side-by-side and not one below the other as would be normal behavior of two "div" elements used in the same page. Now here is the trick! Check out the the first