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<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "utf-8" >
< title > jQuery UI Widget - Default functionality< / title >
< link rel = "stylesheet" href = "../../themes/base/jquery.ui.all.css" >
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< script src = "../../jquery-1.7.js" > < / script >
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< script src = "../../ui/jquery.ui.core.js" > < / script >
< script src = "../../ui/jquery.ui.position.js" > < / script >
< script src = "../../ui/jquery.ui.widget.js" > < / script >
< script src = "../../ui/jquery.ui.button.js" > < / script >
< link rel = "stylesheet" href = "../demos.css" >
< style >
.custom-colorize {
font-size: 20px;
position: relative;
width: 75px;
height: 75px;
}
.custom-colorize-changer {
font-size: 10px;
position: absolute;
right: 0;
bottom: 0;
}
< / style >
< script >
$(function() {
// the widget definition, where "custom" is the namespace,
// "colorize" the widget name
$.widget( "custom.colorize", {
// default options
options: {
red: 255,
green: 0,
blue: 0,
// callbacks
change: null,
random: null
},
// the constructor
_create: function() {
this.element
// add a class for theming
.addClass( "custom-colorize" )
// prevent double click to select text
.disableSelection();
this.changer = $( "< button > ", {
text: "change",
"class": "custom-colorize-changer"
})
.appendTo( this.element )
.button();
// bind click events on the changer button to the random method
// in 1.9 would use this._bind( this.changer, { click: "random" });
var that = this;
this.changer.bind("click.colorize", function() {
// _bind would handle this check
if (that.options.disabled) {
return;
}
that.random.apply(that, arguments);
});
this._refresh();
},
// called when created, and later when changing options
_refresh: function() {
this.element.css( "background-color", "rgb(" +
this.options.red +"," +
this.options.green + "," +
this.options.blue + ")"
);
// trigger a callback/event
this._trigger( "change" );
},
// a public method to change the color to a random value
// can be called directly via .colorize( "random" )
random: function( event ) {
var colors = {
red: Math.floor( Math.random() * 256 ),
green: Math.floor( Math.random() * 256 ),
blue: Math.floor( Math.random() * 256 )
};
// trigger an event, check if it's canceled
if ( this._trigger( "random", event, colors ) !== false ) {
this.option( colors );
}
},
// events bound via _bind are removed automatically
// revert other modifications here
_destroy: function() {
// remove generated elements
this.changer.remove();
this.element
.removeClass( "custom-colorize" )
.enableSelection()
.css( "background-color", "transparent" );
},
// _setOptions is called with a hash of all options that are changing
// always refresh when changing options
_setOptions: function() {
// in 1.9 would use _superApply
$.Widget.prototype._setOptions.apply( this, arguments );
this._refresh();
},
// _setOption is called for each individual option that is changing
_setOption: function( key, value ) {
// prevent invalid color values
if ( /red|green|blue/.test(key) & & (value < 0 | | value > 255) ) {
return;
}
// in 1.9 would use _super
$.Widget.prototype._setOption.call( this, key, value );
}
});
// initialize with default options
$( "#my-widget1" ).colorize();
// initialize with two customized options
$( "#my-widget2" ).colorize({
red: 60,
blue: 60
});
// initialize with custom green value
// and a random callback to allow only colors with enough green
$( "#my-widget3" ).colorize( {
green: 128,
random: function( event, ui ) {
return ui.green > 128;
}
});
// click to toggle enabled/disabled
$( "#disable" ).toggle(function() {
// use the custom selector created for each widget to find all instances
$( ":custom-colorize" ).colorize( "disable" );
}, function() {
$( ":custom-colorize" ).colorize( "enable" );
});
// click to set options after initalization
$( "#black" ).click( function() {
$( ":custom-colorize" ).colorize( "option", {
red: 0,
green: 0,
blue: 0
});
});
});
< / script >
< / head >
< body >
< div class = "demo" >
< div >
< div id = "my-widget1" > color me< / div >
< div id = "my-widget2" > color me< / div >
< div id = "my-widget3" > color me< / div >
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< button id = "disable" > Toggle disabled option< / button >
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< button id = "black" > Go black< / button >
< / div >
< / div > <!-- End demo -->
< div class = "demo-description" >
< p > This demo shows a simple custom widget built using the widget factory (jquery.ui.widget.js).< / p >
< p > The three boxes are initialized in different ways. Clicking them changes their background color. View source to see how it works, its heavily commented< / p >
< p > < a href = "http://wiki.jqueryui.com/w/page/12138135/Widget-factory" > For more details on the widget factory, visit the jQuery UI planning wiki.< / a > < / p >
< / div > <!-- End demo - description -->
< / body >
< / html >
