jQuery UI 拖/放，捕捉到底部

Question

所以，基于this answer ，我有一组可以拖放并卡入到位的 div。唯一的问题是，可拖动的 div 具有不同的高度，我需要它们始终捕捉到目标的底部，而不是顶部。

您可以在this JsFiddle中看到标记的演示以及我遇到的问题。 .

标记是这样的:

<!-- Slots are droppable targets -->
<div class="devices">
  <div class="slot" id="slot_10">
    <span class="text">Slot 10</span>
  </div>
  <div class="slot" id="slot_9">
    <span class="text">Slot 9</span>
  </div>
  ...
</div>
<!-- .device is draggable -->
<div class="products">
  <div class="device" data-height="2" id="device_1">
    Device 1
  </div>
  <div class="device" data-height="1" id="device_2">
    Device 2
  </div>
  ...
</div>

这是 JS 部分:

$(function(){
  $('.device').draggable({});
  $('.slot, .products').droppable({
    hoverClass: 'active',
    drop: function(event, ui) {
      console.log("Dropped:",ui.draggable.attr('id'),"on:",$(this).attr('id'));
      $(ui.draggable).detach().css({top:'',left:0,bottom:0}).appendTo(this);
    }
  });
});

这是CSS

.sample-ui { margin: 40px auto 0; width: 700px; }
.cabinet { width: 335px; float: left; margin-right: 65px; }
.rack { width: 30px; margin-right: 5px; float: left; }
.devices { float: left; width: 300px; }
.bolt, .device, .slot {
  position: relative;
  height: 30px; line-height: 30px; text-align: center; background: #FFF;
  margin-bottom: 5px;
}
.slot { background: #EEE; }
.slot .text { display: block; position: absolute; width: 100%; top: 0; left: 0; }
.active { border: 1px solid #F00; }
.device { z-index: 100; }
.device[data-height="2"] { height: 65px; }
.device[data-height="3"] { height: 100px; }

.catalogue {
  width: 300px; float: left;
}

在我看来，如果 div 位于相对定位 div 内的绝对底部 0，它应该被捕捉到底部......但事实并非如此。我在这里忽略了什么？

Answer 1

我只是在玩类似的东西 another question我认为同样的方法可能适合您。

基本上我找到了添加新的snapModes的方法到 jQuery-UI。

您将需要编辑 jQuery-ui 文件，但我认为这可能是值得的。

除了标准的内部、外部以及两者。我添加了以下选项:

• 内部顶部
• 内底
• 内左
• 内右
• 外部顶部
• 外底
• 外部右
• 外部左

<强> Working Example

方法如下:

搜索:

if(o.snapMode != 'inner') {
                var ts = Math.abs(t - y2) <= d;
                var bs = Math.abs(b - y1) <= d;
                var ls = Math.abs(l - x2) <= d;
                var rs = Math.abs(r - x1) <= d;
                if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
                if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b, left: 0 }).top - inst.margins.top;
                if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l - inst.helperProportions.width }).left - inst.margins.left;
                if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r }).left - inst.margins.left;
            }

            var first = (ts || bs || ls || rs);

            if(o.snapMode != 'outer') {
                var ts = Math.abs(t - y1) <= d;
                var bs = Math.abs(b - y2) <= d;
                var ls = Math.abs(l - x1) <= d;
                var rs = Math.abs(r - x2) <= d;
                if(ts) ui.position.top = inst._convertPositionTo("relative", { top: t, left: 0 }).top - inst.margins.top;
                if(bs) ui.position.top = inst._convertPositionTo("relative", { top: b - inst.helperProportions.height, left: 0 }).top - inst.margins.top;
                if(ls) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: l }).left - inst.margins.left;
                if(rs) ui.position.left = inst._convertPositionTo("relative", { top: 0, left: r - inst.helperProportions.width }).left - inst.margins.left;
            }

并将其替换为:

if (o.snapMode != 'inner' && o.snapMode != 'innerTop' && o.snapMode != 'innerBottom' && o.snapMode != 'innerLeft' && o.snapMode != 'innerRight' && o.snapMode != 'outerTop' && o.snapMode != 'outerBottom' && o.snapMode != 'outerLeft' && o.snapMode != 'outerRight') {
    var ts = Math.abs(t - y2) <= d;
    var bs = Math.abs(b - y1) <= d;
    var ls = Math.abs(l - x2) <= d;
    var rs = Math.abs(r - x1) <= d;
    if (ts) ui.position.top = inst._convertPositionTo("relative", {
        top: t - inst.helperProportions.height,
        left: 0
    }).top - inst.margins.top;
    if (bs) ui.position.top = inst._convertPositionTo("relative", {
        top: b,
        left: 0
    }).top - inst.margins.top;
    if (ls) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: l - inst.helperProportions.width
    }).left - inst.margins.left;
    if (rs) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: r
    }).left - inst.margins.left;
}

var first = (ts || bs || ls || rs);

if (o.snapMode != 'outer' && o.snapMode != 'innerTop' && o.snapMode != 'innerBottom' && o.snapMode != 'innerLeft' && o.snapMode != 'innerRight' && o.snapMode != 'outerTop' && o.snapMode != 'outerBottom' && o.snapMode != 'outerLeft' && o.snapMode != 'outerRight') {
    var ts = Math.abs(t - y1) <= d;
    var bs = Math.abs(b - y2) <= d;
    var ls = Math.abs(l - x1) <= d;
    var rs = Math.abs(r - x2) <= d;
    if (ts) ui.position.top = inst._convertPositionTo("relative", {
        top: t,
        left: 0
    }).top - inst.margins.top;
    if (bs) ui.position.top = inst._convertPositionTo("relative", {
        top: b - inst.helperProportions.height,
        left: 0
    }).top - inst.margins.top;
    if (ls) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: l
    }).left - inst.margins.left;
    if (rs) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: r - inst.helperProportions.width
    }).left - inst.margins.left;
}

if (o.snapMode == 'innerTop') {
    var ts = Math.abs(t - y1) <= d;
    if (ts) ui.position.top = inst._convertPositionTo("relative", {
        top: t,
        left: 0
    }).top - inst.margins.top;
}

if (o.snapMode == 'innerBottom') {
    var bs = Math.abs(b - y2) <= d;
    if (bs) ui.position.top = inst._convertPositionTo("relative", {
        top: b - inst.helperProportions.height,
        left: 0
    }).top - inst.margins.top;
}

if (o.snapMode == 'innerLeft') {
    var ls = Math.abs(l - x1) <= d;
    if (ls) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: l
    }).left - inst.margins.left;
}

if (o.snapMode == 'innerRight') {
    var rs = Math.abs(r - x2) <= d;
    if (rs) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: r - inst.helperProportions.width
    }).left - inst.margins.left;
}


if (o.snapMode == 'outerTop') {
    var ts = Math.abs(t - y2) <= d;
    if (ts) ui.position.top = inst._convertPositionTo("relative", {
        top: t - inst.helperProportions.height,
        left: 0
    }).top - inst.margins.top;
}

if (o.snapMode == 'outerBottom') {
    var bs = Math.abs(b - y1) <= d;
    if (bs) ui.position.top = inst._convertPositionTo("relative", {
        top: b,
        left: 0
    }).top - inst.margins.top;
}

if (o.snapMode == 'outerLeft') {
    var ls = Math.abs(l - x2) <= d;
    if (ls) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: l - inst.helperProportions.width
    }).left - inst.margins.left;
}

if (o.snapMode == 'outerRight') {
    var rs = Math.abs(r - x1) <= d;
    if (rs) ui.position.left = inst._convertPositionTo("relative", {
        top: 0,
        left: r
    }).left - inst.margins.left;
}