leonaScroll-1.3.js——属性

1. 默认：该方法选中元素的第一个子元素，并默认给其添加一个名为“scroll_text”class类名
2. 解释：可自定义你需要滚动的文本类名，默认为调用方法下的第一个子元素，填写滚动文本类名即可，规则和css一样，如.class或#id或li
3. 用法：$("Element").LeonaScroll({scroll_text :‘.class‘})

1. 默认：20px
2. 解释：可自定义调节滚动的快慢，以像素定义，数字越大越快，越小越慢
3. 用法：$("Element").LeonaScroll({speed:50})

1. 默认：14px
2. 解释：可自定义滚动条整体宽度，以像素为单位，填入数字即可
3. 用法：$("Element").LeonaScroll({sWidth :14})

1. 默认：20
2. 解释：可自定义滚动条上下箭头（微调按钮）高度，其宽度会根据滚动条宽度自适应，你只需定义好滚动条宽度即可
3. 用法：$("Element").LeonaScroll({updownH :20})

1. 默认：滚动文本内容宽度=调用方法时选中的对象宽度-滚动条宽度
2. 解释：如果你希望的滚动条与滚动文本之间有一定间隔，你可以自定义滚动文本的内容的宽度，这里的滚动文本定位采用的float:right; 滚动条采用float:left，以像素为单位，填写数字即可
3. 用法：$("Element").LeonaScroll({text_width :400})

  1 $.fn.extend({
  2     LeonaScroll: function (parameter) {
  3         parameter = parameter === undefined ? {} : parameter;
  4         var Sname = $(this).selector;
  5         var allar = this;
  6         return this.each(function () {
  7 
  8             var havedefsrolltext = $(this).find(parameter.scroll_text).length;
  9             if (!havedefsrolltext) {
 10                 parameter.scroll_text = ".scroll_text";
 11                 $($(this).children().get(0)).addClass("scroll_text");
 12             }
 13             //变量声明
 14             var elem = $(this),
 15                 celem = $(this).find(parameter.scroll_text),
 16                 index = Sname.replace(".", "").toUpperCase() + $(Sname).index($(this)),
 17                 text_hidden = $(elem).height(),
 18                 con_width = $(elem).width();
 19             $(elem).unbind();
 20 
 21             //添加滚动条Html
 22             var cansc = $(".leonaup" + index + "").length;
 23             if (!cansc) {
 24                 var scrollHTML = "";
 25                 scrollHTML += "<div class=‘scroll_up leonaup" + index + "‘></div>";
 26                 scrollHTML += "<div class=‘scroll_cen leonacen" + index + "‘><div class=‘scroll_button leonabutton" + index + "‘></div></div>";
 27                 scrollHTML += "<div class=‘scroll_down leonadown" + index + "‘></div>";
 28                 $(elem).append("<div class=‘scroll leonas" + index + "‘> " + scrollHTML + "</div>");
 29             }
 30 
 31             //滚动条CSS--必要
 32             var sW = parameter.sWidth === undefined ? 14 : parameter.sWidth;
 33             var scrollStyle = Sname + "{ position: relative; overflow-y: hidden; clear:none;-moz-user-select: none; /*火狐*/ -webkit-user-select: none; /*webkit浏览器*/ -ms-user-select: none; /*IE10*/ -khtml-user-select: none; /*早期浏览器*/ user-select: none;  }\r\n";
 34             scrollStyle += Sname + " " + parameter.scroll_text + "{width:" + (parameter.text_width === undefined ? (con_width - sW) : parameter.text_width) + "px; word-break: break-word; position: absolute; left: 0; top: 0; clear:both; }\r\n";
 35             scrollStyle += Sname + " .scroll { height:" + text_hidden + "px; float:right; }\r\n";
 36             scrollStyle += Sname + " .scroll," + Sname + " .scroll .scroll_cen, " + Sname + " .scroll .scroll_up, " + Sname + " .scroll .scroll_down { width:" + sW + "px; }\r\n"
 37             scrollStyle += Sname + " .scroll .scroll_up," + Sname + " .scroll .scroll_down {height:" + (parameter.updownH === undefined ? 20 : parameter.updownH) + "px; cursor: pointer;}\r\n";
 38             scrollStyle += Sname + " .scroll .scroll_cen { height:" + (text_hidden - (parameter.updownH === undefined ? 20 : parameter.updownH) * 2) + "px; position: relative; }\r\n";
 39             scrollStyle += Sname + " .scroll .scroll_cen .scroll_button { width:" + (sW - 2) + "px;  margin: 0px 1px;  position: absolute; cursor: pointer; }\r\n";
 40 
 41             //滚动条美化CSS--默认
 42             var needAutoStyle = parameter.autoStyle === undefined ? true : parameter.autoStyle
 43             if (needAutoStyle == true) {
 44                 scrollStyle += Sname + " .scroll .scroll_up, .scroll .scroll_down { background-image: url(/images/bw.png); background-color: #161515; background-repeat: no-repeat; }\r\n";
 45                 scrollStyle += Sname + " .scroll .scroll_up {  background-position: center 6px; border-radius: 5px 5px 0 0;} \r\n ";
 46                 scrollStyle += Sname + " .scroll .scroll_up:hover { background-position: center -11px;} \r\n";
 47                 scrollStyle += Sname + " .scroll .scroll_down { background-position: center -49px; border-radius: 0 0 5px 5px;} \r\n";
 48                 scrollStyle += Sname + " .scroll .scroll_down:hover { background-position: center -31px;}\r\n ";
 49                 scrollStyle += Sname + " .scroll .scroll_cen {  background-color: #777676;}\r\n ";
 50                 scrollStyle += Sname + " .scroll .scroll_cen .scroll_button {  background: url(/images/tiao.jpg) repeat-y 0 0; border-radius: 5px;}\r\n ";
 51             } else {
 52                 scrollStyle += Sname + " .scroll .scroll_up, .scroll .scroll_down {" + parameter.scroll_UDCss + "}\r\n";
 53                 scrollStyle += Sname + " .scroll .scroll_up {" + parameter.scroll_upCss + "}\r\n ";
 54                 scrollStyle += Sname + " .scroll .scroll_up:hover {" + parameter.scroll_upCssHover + "}\r\n";
 55                 scrollStyle += Sname + " .scroll .scroll_down { " + parameter.scroll_downCss + "}\r\n";
 56                 scrollStyle += Sname + " .scroll .scroll_down:hover {" + parameter.scroll_downCssHover + "}\r\n ";
 57                 scrollStyle += Sname + " .scroll .scroll_cen {" + parameter.scroll_cenCss + "}\r\n ";
 58                 scrollStyle += Sname + " .scroll .scroll_cen .scroll_button { " + parameter.scroll_cenButtonCss + "}\r\n ";
 59             }
 60 
 61             //添加上述样式至html头部head中
 62             if ($("#leonascrollStyle").length) {
 63                 $("#leonascrollStyle").html($("#leonascrollStyle").html() + scrollStyle);
 64             } else {
 65                 $("head").append("<style type=‘text/css‘ id=‘leonascrollStyle‘>" + scrollStyle + "</style>");
 66             }
 67 
 68             //变量声明
 69             var text_show = parameter.addHeight === undefined ? $(celem).height() : $(celem).height() + parameter.addHeight,
 70             scroll_b = $(".leonabutton" + index + ""),
 71             text_p = text_hidden / text_show,
 72             bH_max = $(".leonas" + index + " .leonacen" + index + "").height(),
 73             bH = text_p * bH_max;
 74             if (parameter.scrollbar == true || parameter.scrollbar === undefined) {
 75                 if (text_p >= 1) {
 76                     $(".leonas" + index + "").css("display", "none")
 77                 }
 78                 else {
 79                     $(".leonas" + index + "").css("display", "block"); scroll_b.css("height", bH + "px");
 80                 };
 81             } else if (parameter.scrollbar == false) {
 82                 if (text_p >= 1) {
 83                     $(".leonas" + index + "").css("display", "block"); scroll_b.css("height", bH_max + "px");
 84                     bH = bH_max;
 85                     return false;
 86                 }
 87                 else {
 88                     $(".leonas" + index + "").css("display", "block"); scroll_b.css("height", bH + "px");
 89                 };
 90             };
 91             //鼠标拖动div事件
 92             var needMove = false, mouseY = 0;
 93             scroll_b.mousedown(function (event) { needMove = true; var bH_Top = scroll_b.position().top; mouseY = event.pageY - bH_Top; });
 94             $(document).mouseup(function (event) { needMove = false; });
 95             $(document).mousemove(function (event) {
 96                 if (needMove) {
 97                     var sMouseY = event.pageY, bH_Top = sMouseY - mouseY, textY = bH_Top / bH_max * text_show;
 98                     if (bH_Top <= 0) {
 99                         scroll_b.css("top", 0);
100                         $(celem).css("top", 0);
101                         return;
102                     }
103                     if (bH_Top >= bH_max - bH) {
104                         scroll_b.css("top", bH_max - bH);
105                         $(celem).css("top", text_hidden - text_show);
106                         return;
107                     }
108                     scroll_b.css("top", bH_Top); $(celem).css("top", -textY);
109                 }
110                 return;
111             });
112 
113             //定义上下滚动规则
114             function goGun(direction, timer) {
115                 bH_Top = scroll_b.position().top;
116                 var h = 0; h += (parameter.speed === undefined ? 20 : parameter.speed);
117                 if (direction == 1) {
118                     var Toping = bH_Top - h;
119                     if (bH_Top <= 0 || Toping <= 0) {
120                         scroll_b.css("top", 0);
121                         $(celem).css("top", 0);
122                         if (timer == 2) clearInterval(goThread);
123                         return;
124                     }
125                     scroll_b.css("top", bH_Top - h);
126                 }
127                 if (direction == -1) {
128                     var Downing = bH_Top + h;
129                     if (bH_Top >= bH_max - bH || Downing >= bH_max - bH) {
130                         scroll_b.css("top", bH_max - bH);
131                         $(celem).css("top", text_hidden - text_show);
132                         if (timer == 2) clearInterval(goThread);
133                         return;
134                     }
135                     scroll_b.css("top", bH_Top + h);
136                 }
137                 var textY = bH_Top / bH_max * text_show;
138                 $(celem).css("top", -textY);
139             }
140 
141             //上下微调按钮事件
142             function minTiao(minTB, d, t) {
143                 var goThread = "";
144                 minTB.mouseup(function () { clearInterval(goThread); });
145                 minTB.mousedown(function () {
146                     clearInterval(goThread);
147                     goThread = setInterval(function () { goGun(d, t); }, 300);
148                 });
149                 minTB.click(function () { goGun(d); });
150             }
151             minTiao($(".leonaup" + index + ""), 1, 2);
152             minTiao($(".leonadown" + index + ""), -1, 2);
153 
154 
155 
156             //判断鼠标上下滚动方向
157             var delta;
158             var scrollFunc = function (e) {
159                 e = e || window.event;
160                 if (e.wheelDelta) {
161                     if (e.wheelDelta > 0) { delta = 1 }
162                     if (e.wheelDelta < 0) { delta = -1 }
163                 } else if (e.detail) {
164                     if (e.detail > 0) { delta = 1 }
165                     if (e.detail < 0) { delta = -1 }
166                 };
167 
168                 //滚轮事件
169                 if (text_p < 1) {
170                     if (cansc <= 1) {
171                         if (delta == 1) {//up
172                             goGun(1, 0);
173                             if (scroll_b.position().top != 0)return false;
174                         } if (delta == -1) {//down
175                             goGun(-1, 0);
176                             if (Math.ceil(scroll_b.position().top) != Math.ceil(bH_max - bH))return false;
177                         }
178                     }
179                 };
180             }
181 
182             //当鼠标悬停在元素上的时候给页面绑定滚动事件
183             $(elem).hover(function () {
184                 if (document.addEventListener) {
185                     document.addEventListener(‘DOMMouseScroll‘, scrollFunc, false);
186                 }
187                 window.onmousewheel = document.onmousewheel = scrollFunc;
188             }, function () {//否则解绑滚动事件
189                 if (document.addEventListener) {
190                     document.removeEventListener(‘DOMMouseScroll‘, scrollFunc, false);
191                 }
192                 window.onmousewheel = document.onmousewheel = null;
193             });
194 
195         });
196     }
197 
198 });

作者：leona

原文链接：http://www.cnblogs.com/leona-d/p/5950280.html