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<!doctype html> |
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<html lang="en"> |
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<head> |
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<meta charset="utf-8"> |
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<title>jQuery UI Widget - Default functionality</title> |
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<link rel="stylesheet" href="../../themes/base/jquery.ui.all.css"> |
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<script src="../../jquery-1.9.1.js"></script> |
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<script src="../../ui/jquery.ui.core.js"></script> |
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<script src="../../ui/jquery.ui.position.js"></script> |
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<script src="../../ui/jquery.ui.widget.js"></script> |
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<script src="../../ui/jquery.ui.button.js"></script> |
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<link rel="stylesheet" href="../demos.css"> |
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<style> |
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.custom-colorize { |
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font-size: 20px; |
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position: relative; |
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width: 75px; |
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height: 75px; |
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} |
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.custom-colorize-changer { |
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font-size: 10px; |
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position: absolute; |
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right: 0; |
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bottom: 0; |
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} |
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</style> |
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<script> |
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$(function() { |
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// the widget definition, where "custom" is the namespace, |
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// "colorize" the widget name |
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$.widget( "custom.colorize", { |
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// default options |
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options: { |
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red: 255, |
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green: 0, |
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blue: 0, |
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|
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// callbacks |
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change: null, |
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random: null |
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}, |
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|
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// the constructor |
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_create: function() { |
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this.element |
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// add a class for theming |
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.addClass( "custom-colorize" ) |
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// prevent double click to select text |
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.disableSelection(); |
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|
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this.changer = $( "<button>", { |
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text: "change", |
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"class": "custom-colorize-changer" |
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}) |
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.appendTo( this.element ) |
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.button(); |
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|
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// bind click events on the changer button to the random method |
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this._on( this.changer, { |
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// _on won't call random when widget is disabled |
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click: "random" |
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}); |
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this._refresh(); |
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}, |
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|
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// called when created, and later when changing options |
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_refresh: function() { |
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this.element.css( "background-color", "rgb(" + |
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this.options.red +"," + |
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this.options.green + "," + |
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this.options.blue + ")" |
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); |
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|
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// trigger a callback/event |
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this._trigger( "change" ); |
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}, |
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|
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// a public method to change the color to a random value |
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// can be called directly via .colorize( "random" ) |
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random: function( event ) { |
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var colors = { |
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red: Math.floor( Math.random() * 256 ), |
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green: Math.floor( Math.random() * 256 ), |
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blue: Math.floor( Math.random() * 256 ) |
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}; |
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|
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// trigger an event, check if it's canceled |
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if ( this._trigger( "random", event, colors ) !== false ) { |
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this.option( colors ); |
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} |
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}, |
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|
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// events bound via _on are removed automatically |
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// revert other modifications here |
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_destroy: function() { |
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// remove generated elements |
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this.changer.remove(); |
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|
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this.element |
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.removeClass( "custom-colorize" ) |
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.enableSelection() |
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.css( "background-color", "transparent" ); |
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}, |
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|
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// _setOptions is called with a hash of all options that are changing |
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// always refresh when changing options |
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_setOptions: function() { |
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// _super and _superApply handle keeping the right this-context |
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this._superApply( arguments ); |
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this._refresh(); |
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}, |
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|
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// _setOption is called for each individual option that is changing |
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_setOption: function( key, value ) { |
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// prevent invalid color values |
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if ( /red|green|blue/.test(key) && (value < 0 || value > 255) ) { |
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return; |
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} |
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this._super( key, value ); |
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} |
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}); |
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|
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// initialize with default options |
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$( "#my-widget1" ).colorize(); |
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|
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// initialize with two customized options |
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$( "#my-widget2" ).colorize({ |
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red: 60, |
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blue: 60 |
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}); |
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|
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// initialize with custom green value |
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// and a random callback to allow only colors with enough green |
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$( "#my-widget3" ).colorize( { |
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green: 128, |
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random: function( event, ui ) { |
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return ui.green > 128; |
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} |
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}); |
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|
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// click to toggle enabled/disabled |
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$( "#disable" ).click(function() { |
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// use the custom selector created for each widget to find all instances |
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// all instances are toggled together, so we can check the state from the first |
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if ( $( ":custom-colorize" ).colorize( "option", "disabled" ) ) { |
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$( ":custom-colorize" ).colorize( "enable" ); |
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} else { |
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$( ":custom-colorize" ).colorize( "disable" ); |
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} |
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}); |
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|
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// click to set options after initalization |
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$( "#black" ).click( function() { |
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$( ":custom-colorize" ).colorize( "option", { |
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red: 0, |
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green: 0, |
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blue: 0 |
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}); |
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}); |
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}); |
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</script> |
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</head> |
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<body> |
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|
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<div> |
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<div id="my-widget1">color me</div> |
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<div id="my-widget2">color me</div> |
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<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> |
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</div> |
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|
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<div class="demo-description"> |
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<p>This demo shows a simple custom widget built using the widget factory (jquery.ui.widget.js).</p> |
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<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> |
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</div> |
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</body> |
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</html> |
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