javascript - 如何为可拖动元素添加间隔

Question

我创建了一个栏，您可以选择不同的间隔。我正在尝试使其可拖动，我已成功实现。我遇到的问题是我可以拖动绿色扶手栏(其中写着“预算”)。我希望能够拖动抓取栏，然后将其放置在范围点(间隔)的位置，并将抓取栏保持在外部元素#sliderBar内。

我是否可以改变我必须做的事情来使这成为可能？

Here is a fiddle.

 $(function() {
   $("#sliderInterval").draggable();
 });
 $(function() {

   var iSelected = 0;
   var ranges = [{
     lower: 500,
     upper: 1000
   }, {
     lower: 1100,
     upper: 2000
   }, {
     lower: 2100,
     upper: 5000
   }, {
     lower: 5100,
     upper: 10000
   }, {
     lower: 11000,
     upper: 20000
   }, {
     lower: 21000,
     upper: 50000
   }, ];
   var wslider = $("#sliderBar").width() / (ranges.length);
   for (var i = 0; i < ranges.length; i++) {
     var range = $('<div class="rangedot"><div class="intervalCircle"></div></div>');
     var left = (100 / (ranges.length) * i);
     rangeleft = "calc(" + left + "% - 2px)";
     range.css({
       left: rangeleft,
       width: wslider
     });
     range.on("click", function(idx) {
       return function() {
         iSelected = idx;
         var sliderleft = wslider * idx;
         $("#sliderInterval").animate({
           left: sliderleft
         });
         $("#budgetAmount").text("$" + ranges[idx].lower.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") + " - " + "$" + ranges[idx].upper.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ","));
       };
     }(i));
     $("#sliderBar").append(range);
     $("#sliderInterval").css("width", wslider + "px");
   }
   $("#budgetAmount").show().text("$500 - $1,000");

 });

#project-slider-container {
  width: 80%;
  height: auto;
  margin: 40px 0% 30px 0%;
  text-align: center;
}

#project-slider-title {
  text-align: left;
  font-size: 1.2em;
  font-weight: bold;
  margin-bottom: 15px;
}

#project-slider-description {
  text-align: left;
  font-size: 1em;
  line-height: 1.3em;
  color: #2a2a2a;
}

#sliderBar {
  border-radius: 15px;
  width: 100%;
  height: 40px;
  margin: 30px 0;
  background: #454343;
  position: relative;
  overflow: hidden;
}

.intervalCircle {
  border-radius: 50%;
  height: 10px;
  width: 10px;
  background: #CCC;
  z-index: 1;
  display: inline-block;
  margin-top: 18px;
  cursor: pointer;
}

.intervalCircle:hover {
  border-radius: 50%;
  height: 25px;
  width: 25px;
  background: #0085A1;
  z-index: 1;
  display: inline-block;
  margin-top: 11px;
  cursor: pointer;
}

.rangedot {
  height: 40px;
  position: absolute;
  text-align: center;
  left: 0px;
  top: -8px;
  cursor: pointer;
}

#sliderInterval {
  height: 100%;
  border-radius: 15px;
  position: absolute;
  text-align: center;
  z-index: 99;
  color: #FFF;
  font-weight: bold;
  background: #00a16d;
  line-height: 40px;
}

#sliderIntervalBudget {
  padding: 0 5px;
}

#budgetAmount {
  font-size: 1.5em;
  color: #00a16d;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<div id="project-slider-container">
  <div id="project-slider-title">PREFERRED BUDGET</div>
  <div id="sliderBar">
    <div id="sliderInterval"><span id="sliderIntervalBudget">BUDGET</span></div>
  </div>
  <div id="budgetAmount"></div>
</div>

Answer 1

这是使用 Slider 执行此操作的方法。

工作示例:https://jsfiddle.net/Twisty/1846p0nx/3/

HTML

<div id="project-slider-container">
  <div id="project-slider-title">PREFERRED BUDGET</div>
  <div id="project-slider-description">A transparent budget will help set expectations. A higher budget allows for a more complex website project.</div>
  <div class="slide-wrap">
    <div id="slider">
      <div id="custom-handle" class="ui-slider-handle">BUDGET</div>
    </div>
  </div>
  <div id="budgetAmount"></div>
</div>

CSS

.slide-wrap {
  height: 40px;
  padding: 0 60px;
  background: #454343;
  border-radius: 15px;
}

#slider {
  border-radius: 15px;
  height: 40px;
  background: transparent;
  border: 0;
  padding: 0 60px;
}

#custom-handle {
  border-radius: 15px;
  border: 0;
  height: 40px;
  width: 120px;
  text-align: center;
  color: #FFF;
  font-weight: bold;
  background: #00a16d;
  line-height: 40px;
  top: 50%;
  margin-top: -20px;
  margin-left: -60px;
}

JavaScript

$(function(){
   var ranges = [{
     lower: 500,
     upper: 1000
   }, {
     lower: 1100,
     upper: 2000
   }, {
     lower: 2100,
     upper: 5000
   }, {
     lower: 5100,
     upper: 10000
   }, {
     lower: 11000,
     upper: 20000
   }, {
     lower: 21000,
     upper: 50000
   }, ];
   var handle = $("#custom-handle");
   var amount = $("#budgetAmount");
   $("#slider").slider({
     min: 0,
     max: 5,
     step: 1,
     create: function() {
       var i = $(this).slider("value");
       amount.text("$" + ranges[i].lower + " - $" + ranges[i].upper);
       $.each(ranges, function(key, item) {
         var range = $("<div>", {
           class: "rangedot"
         }).data("key", key);
         var dot = $("<div>", {
           class: "intervalCircle"
         }).appendTo(range);
         var l = Math.round(100 / (ranges.length - 1) * key);
         var w = $("#slider").width() / (ranges.length);
         range.css({
           left: "calc(" + l + "% - " + (w / 2) + "px)",
           width: w + "px"
         }).click(function() {
           $("#slider").slider("value", $(this).data("key"));
         }).appendTo("#slider");
       });
     },
     slide: function(event, ui) {
       var i = ui.value;
       amount.text("$" + ranges[i].lower + " - $" + ranges[i].upper);
     }
   });
});

更新

如果您想专门使用可拖动来执行此操作，我建议这样做。

示例:https://jsfiddle.net/Twisty/1846p0nx/4/

$(function() {
   var iSelected = 0;
   var ranges = [{
     lower: 500,
     upper: 1000
   }, {
     lower: 1100,
     upper: 2000
   }, {
     lower: 2100,
     upper: 5000
   }, {
     lower: 5100,
     upper: 10000
   }, {
     lower: 11000,
     upper: 20000
   }, {
     lower: 21000,
     upper: 50000
   }];
   var wslider = $("#sliderBar").width() / (ranges.length);
   $("#sliderInterval").draggable({
     axis: "x",
     grid: [wslider, 0],
     containment: "#sliderBar",
   });
   for (var i = 0; i < ranges.length; i++) {
     var range = $('<div class="rangedot"><div class="intervalCircle"></div></div>');
     var left = (100 / (ranges.length) * i);
     rangeleft = "calc(" + left + "% - 2px)";
     range.css({
       left: rangeleft,
       width: wslider
     });
     range.on("click", function(idx) {
       return function() {
         iSelected = idx;
         var sliderleft = wslider * idx;
         $("#sliderInterval").animate({
           left: sliderleft
         });
         $("#budgetAmount").text("$" + ranges[idx].lower.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",") + " - " + "$" + ranges[idx].upper.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ","));
       };
     }(i));
     $("#sliderBar").append(range);
     $("#sliderInterval").css("width", wslider + "px");
   }
   $("#budgetAmount").show().text("$500 - $1,000");
});

然后，您可以使用 stop 或创建一个可放置的对象来查看它被放置的位置。我仍然建议使用 slider 。