滑块(Slider) - 颜色选择器
组合了三个滑块,来创建一个简单的 RGB 颜色选择器。
源代码
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>jQuery UI 滑块(Slider) - 颜色选择器</title> <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css"> <script src="//code.jquery.com/jquery-1.9.1.js"></script> <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script> <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css"> <style> #red, #green, #blue { float: left; clear: left; width: 300px; margin: 15px; } #swatch { width: 120px; height: 100px; margin-top: 18px; margin-left: 350px; background-image: none; } #red .ui-slider-range { background: #ef2929; } #red .ui-slider-handle { border-color: #ef2929; } #green .ui-slider-range { background: #8ae234; } #green .ui-slider-handle { border-color: #8ae234; } #blue .ui-slider-range { background: #729fcf; } #blue .ui-slider-handle { border-color: #729fcf; } </style> <script> function hexFromRGB(r, g, b) { var hex = [ r.toString( 16 ), g.toString( 16 ), b.toString( 16 ) ]; $.each( hex, function( nr, val ) { if ( val.length === 1 ) { hex[ nr ] = "0" + val; } }); return hex.join( "" ).toUpperCase(); } function refreshSwatch() { var red = $( "#red" ).slider( "value" ), green = $( "#green" ).slider( "value" ), blue = $( "#blue" ).slider( "value" ), hex = hexFromRGB( red, green, blue ); $( "#swatch" ).css( "background-color", "#" + hex ); } $(function() { $( "#red, #green, #blue" ).slider({ orientation: "horizontal", range: "min", max: 255, value: 127, slide: refreshSwatch, change: refreshSwatch }); $( "#red" ).slider( "value", 255 ); $( "#green" ).slider( "value", 140 ); $( "#blue" ).slider( "value", 60 ); }); </script> </head> <body class="ui-widget-content" style="border:0;"> <p class="ui-state-default ui-corner-all ui-helper-clearfix" style="padding:4px;"> <span class="ui-icon ui-icon-pencil" style="float:left; margin:-2px 5px 0 0;"></span> 简单的颜色选择器 </p> <div id="red"></div> <div id="green"></div> <div id="blue"></div> <div id="swatch" class="ui-widget-content ui-corner-all"></div> </body> </html>