mirror of
https://github.com/jquery/jquery-ui.git
synced 2024-11-21 11:04:24 +00:00
173 lines
4.5 KiB
HTML
173 lines
4.5 KiB
HTML
<!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/all.css">
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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 src="../../external/requirejs/require.js"></script>
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<script src="../bootstrap.js" data-modules="button">
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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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// callbacks
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change: null,
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random: null
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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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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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// 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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// 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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// trigger a callback/event
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this._trigger( "change" );
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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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// 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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// 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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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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// _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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// _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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// initialize with default options
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$( "#my-widget1" ).colorize();
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// initialize with two customized options
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$( "#my-widget2" ).colorize({
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red: 60,
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blue: 60
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});
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// initialize with custom green value
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// and a random callback to allow only colors with enough green
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$( "#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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// click to toggle enabled/disabled
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$( "#disable" ).on( "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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$( ":custom-colorize" ).colorize( "disable" );
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}
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});
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// click to set options after initialization
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$( "#green" ).on( "click", function() {
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$( ":custom-colorize" ).colorize( "option", {
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red: 64,
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green: 250,
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blue: 8
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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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<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="green">Go green</button>
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</div>
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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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