jQuery

Checkbox tree with jQuery

Update:

With nothing to do, I remembered the failure with the checkbox tree, and I started re-thinking it. With nothing else on my mind, took me very short time to figure my mistakes; …so now i will update this post and the demo. Of course my opinion about checkboxtree jQuery plugin remains the same, but if you don’t want to use an entire plugin, then you can always use the code here.


Sometime ago I needed an “checkbox tree” ( a nested list with checkboxes in every node ), for options that have sub-options. I decided to write one of my own.

After some try & error, I come up with the following code :

Below is the new improved and corrected code.


(function($){

$('ul#checkboxes input[type="checkbox"]').each (
 function () {
  $(this).bind('click change', function (){
   if($(this).is(':checked')) {
    $(this).siblings('ul').find('input[type="checkbox"]').attr('checked', 'checked');
    $(this).parents('ul').siblings('input[type="checkbox"]').attr('checked', 'checked');
   } else {
    $(this).siblings('ul').find('input[type="checkbox"]').removeAttr('checked', 'checked');
   }
  });
 }
);

})(jQuery);

you can see it in action here. (updated demo, with the new code).

I also found this checkboxtree jQuery plugin . I gave it a try, and worked perfectly, and you just have to write:

$('ul#checkboxes').checkboxTree({ });

and you will have a checkboxtree. This plugin has a lot of options, that you will find on the plugin homepage.

I made a simple demo using the plugin, that you can see it here, but you can see a lot more here.

Clear form fields on focus

If you want to make a form without labels for text inputs or textareas, and instead give the fields default values, you will encounter a little annoying  problem, when you focus the field to write something the default value stays there. To make the default value disappear you will need a few lines of javascript.

$('textarea, input:text').bind('focus click', function(){
		if (this.value == this.defaultValue) {
		this.value = '';
		}
	}).bind('blur', function(){
		if (this.value == '') {
		this.value = this.defaultValue;
		}
	});

Note that this script uses jQuery so in order to work you’ll need to have jQuery installed.

To make all clear here is a demo.

jQuery title tooltip

If you need a simple way to replace the anchor’s ( <a href=”” ></a> ), title=”” attribute with a nice customizable tooltip, below is the code and a demo.

The script adds a html <div> at the end of the <body> tag, and as you hover the specified elements it get’s the title attribute and include it in the <div id=”tooltip”>, the last part of the script is what makes the tooltip move along with mouse cursor.

The nice part is that you can make your tooltip look however you want with CSS.


<ul id="links">
 <li>
   <a href="#" title="This is one">One</a>
 </li>
 <li>
   <a href="#" title="This is two">Two</a>
 </li>
 <li>
   <a href="#" title="This is three">Three</a>
 </li>
 <li>
   <a href="#" title="This is four">Four</a>
 </li>
 <li>
   <a href="#" title="This is five">Five</a>
 </li>
</ul>


#tooltip {
 padding: 10px 15px;
 position: absolute;
 font-size: 14px;
 color: #4E4E4E;
 background: #C4E424;
 z-index: 10;
}


(function($){
	$('body').append('<div id="tooltip"></div>');
	$('#tooltip').hide();
	var $tooltip = $('#tooltip');
    $('ul#links a').each(function(){
        var $this = $(this),
			$title = this.title;
			
        $this.hover(function(){
			this.title = '';
			$tooltip.text($title).show();
        }, function(){
			this.title = $title;
			$tooltip.text('').hide();
        });
		
		$this.mousemove(function(e){
			$tooltip.css({
				top: e.pageY - 10,
				left: e.pageX + 20
			});
		});
    });
})(jQuery);

Here is a demo