Codepal

Posts Tagged ‘forms’

Creating a Neon Blink Effect for your Forms using CSS3 and jQuery

Saturday, July 17th, 2010

Well thanks to the bright new kid on the block, CSS3, spruced up with a bit of jQuery, I will show you how to build a nifty effect to enhance your forms.

Am sure that this cool Neon blink effects in forms are going to be useful for a lot of purposes so don’t miss my tutorial on 1stWebDesigner.com.

In this tutorial, we have made use of @-webkit-keyframes which works only in browsers using the Webkit layout engine like Chrome and Safari. For browsers like Firefox and Opera, where there is no alternative, we will have to gracefully degrade the effect, which in this case will be just a box-shadow on focus. Internet Explorer ( till version 8 ) cannot render most of what we will learn here, but IE 9 does seem to be very promising from what I’ve seen in the recent platform preview.

Tags: CSS 3, Development, forms, how to, jQuery
Posted in Tutorials | 4 Comments »

The ‘Select’ Problem After Using jqTransform and its Solution

Thursday, February 18th, 2010

The Project

In this recent project of mine, I was required to construct a landing page. In this landing page, there would be a list of languages and after the user selects any particular language, the homepage of the site would open automatically in the respective selected language. It was also required to style the select list box in the way it was given in the design of the landing page. So I opted for the jqTransform jQuery plug-in, which I used once to style some forms. jqTransform is very nice plug-in to customize the forms in a very easy way and the end product is no doubt beautiful. But in this case, it became a minor speed breaker to my progress.

The Problem

The drop down list control of the html form contains the ‘select’ tags which enclose the various ‘option’ tags. Here is a form which I am using in this tutorial to explain the problem:

<form>
	<h4>Select Box Without jqTransform</h4>
	<div id="box-city" class="select-menus">
		<label>City</label>
		<br/>
		<select name="select-country">
  		        <option>Gotham</option>
			<option>New York City</option>
			<option>Smallville</option>
		</select>
		<div class="clear"></div>
	</div>
</form>

What jqTransform does is, it scans the whole ‘select’ tag and creates an unordered list containing hyper-links of the options in the drop-down-list. It then hides the original ‘select’ tag and its content.

<form class="jqtransform jqtransformdone">
	<h4>Select box with jqTransform and normal select change method</h4>
	<div class="select-menus" id="box-name">
		<label style="cursor: pointer;">Name</label>
		<div class="jqTransformSelectWrapper" style="z-index: 10; width: 150px;">
			<div>
				<span style="width: 119px;">Batman</span>
				<a class="jqTransformSelectOpen" href="#"></a>
			</div>
                        <ul style="width: 148px; display: none; visibility: visible; height: 100px; overflow: hidden;">
				<li><a index="0" href="#" class="selected">Batman</a></li>
				<li><a index="1" href="#">Robin</a></li>
				<li><a index="2" href="#">Superman</a></li>
				<li><a index="3" href="#">Spiderman</a></li>
			</ul>
			<select name="select-country" class="jqTransformHidden" style="">
	 				<option>Batman</option>
					<option>Robin</option>
					<option>Superman</option>
					<option>Spiderman</option>
			</select>
		</div>
		<div class="clear"></div>
	</div>
</form>

This does not create a problem when we use the ‘select’ tag generally for selecting a particular value and then performing the form submission by using a submit button. It creates a problem when we want to perform some function when the value of the drop down list is changed.

This is normally achieved in javascript by using the ‘change’ method of the select control. The ‘change’ method captures the value-change event and we can access the value selected by the user in the following manner.

// Capturing the change event of the Non-Transformed Select Box.
$("#box-city select").change(function(){
	var value= $(this).val();
    alert("Value Selected = "+value);
});

But after using the jqTransform plugin, the ‘select’ tag is no more there to apply the change method on.

The Solution

The solution to this, is a very simple one. We can simulate the change event for the jqTransformed drop down list by applying a click function to the hyper-link element within the unordered list. Then we can have the selected value by accessing the text of the span tag where the selected element is set or displayed.

// Capturing the change event of the Transformed Select Box using the modified method of capturing the value change event.
$("#box-age div.jqTransformSelectWrapper ul li a").click(function(){
	var value= $("#box-age div.jqTransformSelectWrapper span").text()
	alert("Value Selected = "+value);
	return false; //prevent default browser action
});

Conclusion

This is one way of simulating the change function for drop-down-list boxes after using jqTransform to customize them. The other option is to modify the jqTransform plugin itself to properly access the onChange event of the ‘Select’ boxes. I hope the jqTransform plug-in developers can fix this problem in their next release of the plug-in. Though this is not a very important or common bug but I do hope that this was of some help.

Tags: CSS, forms, jqTransform, jQuery
Posted in Tutorials | 73 Comments »