一步步教你实现跨游览器的颜色选择器

原文：http://www.cnblogs.com/rubylouvre/archive/2009/07/24/1530264.html#2580430

 

 

 
<!doctype html>
<html dir="ltr" lang="zh-CN">
    <head>
        <meta charset="utf-8"/>
        <meta http-equiv="X-UA-Compatible" content="IE=Edge">
        <style type="text/css">
        </style>
    </head>
    <body bgcolor="#D5F3F4">
      
        <div id="result"></div>
        <script type="text/javascript">
            var addSheet = function(){
                var doc,cssCode;
                if(arguments.length == 1){
                    doc = document;
                    cssCode = arguments[0];
                }else if(arguments.length == 2){
                    doc = arguments[0];
                    cssCode = arguments[1];
                }else{
                    alert("addSheet函数最多接受两个参数!");
                }
                var headElement = doc.getElementsByTagName("head")[0];
                var styleElements = headElement.getElementsByTagName("style");
                if(styleElements.length == 0){/*如果不存在style元素则创建*/
                    if(!+"\v1"){    //ie
                        doc.createStyleSheet();
                    }else{
                        var tempStyleElement = doc.createElement('style');//w3c
                        tempStyleElement.setAttribute("type", "text/css");
                        headElement.appendChild(tempStyleElement);
                    }
                }
                var  styleElement = styleElements[0];
                var media = styleElement.getAttribute("media");
                if(media != null && !/screen/.test(media.toLowerCase()) ){
                    styleElement.setAttribute("media","screen");
                }
                if(!+"\v1"){    //ie
                    styleElement.styleSheet.cssText += cssCode;
                }else if(/a/[-1]=='a'){
                    styleElement.innerHTML += cssCode;//火狐支持直接innerHTML添加样式表字串
                }else{
                    styleElement.appendChild(doc.createTextNode(cssCode))
                }
            }
            var Class = {
                create: function() {
                    return function() {
                        this.initialize.apply(this, arguments);
                    }
                }
            }
            var extend = function(destination, source) {
                for (var property in source) {
                    destination[property] = source[property];
                }
                return destination;
            }
            var ColorPicker =  Class.create();//我们的富文本编辑器类
            ColorPicker.prototype = {
                initialize:function(options){
                    this.setOptions(options);
                    this.drawPicker(this.options.textfield_id);
                },
                setOptions:function(options){
                    this.options = { //这里集中设置默认属性
                        id:'colorpicker'+ new Date().getTime(),
                        textfield_id:null//用于textarea的ID,也就是我们的必选项
                    }
                    extend(this.options, options || {});//这里是用来重写默认属性
                },
                ID:function(id){
                    return document.getElementById(id)
                },//getElementById的快捷方式
                TN:function(tn){
                    return document.getElementsByTagName(tn)
                },//getElementsByTagName的快捷方式
                CE:function(s){
                    return document.createElement(s)
                },//createElement的快捷方式
                hide:function(el){
                    el.style.display = 'none';
                },
                show:function(el){
                    el.style.display = 'block';
                },
                //用于生成颜色选择器的具体内容
                colorPickerHtml : function(){
                    var  _hex = ['FF', 'CC', '99', '66', '33', '00'];
                    var builder = [];
                    // 呈现一个颜色格
                    var _drawCell = function(builder, red, green, blue){
                        builder.push('<td bgcolor="');
                        builder.push('#' + red + green + blue);
                        builder.push('" unselectable="on"></td>');
                    };
                    // 呈现一行颜色
                    var _drawRow = function(builder, red, blue){
                        builder.push('<tr>');
                        for (var i = 0; i < 6; ++i) {
                            _drawCell(builder, red, _hex[i], blue)
                        }
                        builder.push('</tr>');
                    };
                    // 呈现六个颜色区之一
                    var _drawTable = function(builder, blue){
                        builder.push('<table class="cell" unselectable="on">');
                        for (var i = 0; i < 6; ++i) {
                            _drawRow(builder, _hex[i], blue)
                        }
                        builder.push('</table>');
                    };
                    //开始创建
                    builder.push('<table><tr>');
                    for (var i = 0; i < 3; ++i) {
                        builder.push('<td>');
                        _drawTable(builder, _hex[i]);
                        builder.push('</td>');
                    }
                    builder.push('</tr><tr>');
                    for (var i = 3; i < 6; ++i) {
                        builder.push('<td>');
                        _drawTable(builder, _hex[i])
                        builder.push('</td>');
                    }
                    builder.push('</tr></table>');
                    builder.push('<table id="color_result"><tr><td id="color_view"></td><td id="color_code"></td></tr></table>');
                    return builder.join('');
                },
                addEvent:function(el, type, fn ) {
                    if(!+"\v1") {
                        el['e'+type+fn]=fn;
                        el.attachEvent( 'on'+type, function() {
                            el['e'+type+fn]();
                        } );
                    }else{
                        el.addEventListener( type, fn, false );
                    }
                },
                drawPicker:function(id){
                    var $ = this,
                    textfield = $.ID(id),
                    colorPicker = $.CE("div");
                    colorPicker.className = "colorpicker";
                    colorPicker.innerHTML = $.colorPickerHtml();
                    textfield.parentNode.insertBefore(colorPicker,null);
                    $.hide(colorPicker);
                    $.addEvent(textfield,'focus',function(){
                        textfield.style.position = 'relative';
                        $.show(colorPicker);
                        var l = textfield.offsetLeft + 'px',
                        t = (textfield.clientHeight + textfield.offsetTop)+ 'px';
                        if(/msie|MSIE 6/.test(navigator.userAgent)){
                            var iframe = $.CE("<iframe id='picker_mask' style='left:"+l
                                +";width:220px;filter:mask();position:absolute;"+";top:"+t
                                +"height:180px;z-index:1;'></iframe>");//z-index不能为负数
                            textfield.insertAdjacentElement('afterEnd',iframe);
                        }
                        colorPicker.style.left =l ;
                        colorPicker.style.top = t ;
                    })
                    $.addEvent(colorPicker,'mouseover',function(){
                        var e = arguments[0] || window.event,
                        td = e.srcElement ? e.srcElement : e.target,
                        nn = td.nodeName.toLowerCase(),
                        colorView = $.ID('color_view'),
                        colorCode = $.ID('color_code');
                        if( 'td' == nn){
                            colorView.style.backgroundColor = td.bgColor;
                             !+"\v1"? (colorCode.innerText = td.bgColor):(colorCode.innerHTML = td.bgColor);
                        }
                    });
                    $.addEvent(colorPicker,'click',function(){
                        var e = arguments[0] || window.event,
                        td = e.srcElement ? e.srcElement : e.target,
                        nn = td.nodeName.toLowerCase();
                        if(nn == 'td'){
                            textfield.value = td.bgColor;
                            $.hide(colorPicker);
                            var iframe =  $.ID("picker_mask");
                            iframe && iframe.parentNode.removeChild(iframe);
                        }
                    });

                    addSheet('\
          div.colorpicker {display:none;position:absolute;width:216px;border:2px solid #c3c9cf;background:#f8f8f8;}\
          div.colorpicker table{border-collapse:collapse;margin:0;padding:0;width:100%;}\
          div.colorpicker .cell td{height:12px;width:12px;}\
          div.colorpicker  table td {padding:0!important;}\
          #color_result{width:216px;}\
          #color_view{width:110px;height:25px;}');
                }
            }
            window.onload = function(){
                new ColorPicker({textfield_id:"color"});
            }
        </script>
        <input id="color" type="text"><br />
        <select>
            <option>
                看能否挡住！
            </option>
        </select><br  />
        <input type="password" value="" />
    </body>
</html>

 

posted @ 2016-12-22 12:26  这个名字想了很久~  阅读(275)  评论(0)  编辑  收藏  举报