Question

我想用CSS创建一个＆＃34; grip＆＃34;用于表示元素可拖动的背景。（见https://ux.stackexchange.com/a/34639/39138）

目前我有一个dnd类用于该项，CSS看起来像：

.dnd {
  background: #99bbee; /* would like to be able to change this dynamically */
  padding: 1em;
  margin: 2em;
  border-radius: 0.25em;
  width: 14em;
  transition: all 0.25s;
}
.dnd:hover {
  box-shadow: 0.25em 0.25em 0.3em rgba(0,0,0,0.2);
  margin: 1.75em 2.1em 2.25em 1.9em;
  cursor: move; /* fallback if grab cursor is unsupported */
  cursor: grab;
  cursor: -moz-grab;
  cursor: -webkit-grab;
}
.dnd:active { 
  cursor: grabbing;
  cursor: -moz-grabbing;
  cursor: -webkit-grabbing;
}
.dnd::before { /* the grip */
  content: " ";
  display: inline-block;
  width: 1.5em;
  height: 2em;
  margin: -0.5em 0.75em -0.5em -0.5em; 

  background-color: transparent;
  background-size: 0.5em 0.5em;
  background-position: 0 0;
  /* Background image - unfortunately requires background color */
  background-image: 
    -webkit-linear-gradient(#99bbee 50%, transparent 50%),
    -webkit-linear-gradient(left, rgba(0,0,0,0.2) 50%, transparent 50%);
  background-image: 
    -moz-linear-gradient(#99bbee 50%, transparent 50%),
    -moz-linear-gradient(left, rgba(0,0,0,0.2) 50%, transparent 50%);
  background-image: 
    -o-linear-gradient(#99bbee 50%, transparent 50%),
    -o-linear-gradient(left, rgba(0,0,0,0.2) 50%, transparent 50%);
  background-image: 
    linear-gradient(#99bbee 50%, transparent 50%),
    linear-gradient(to right, rgba(0,0,0,0.2) 50%, transparent 50%);
}

...这可以在夹子上创建几个方框作为背景，但我不希望夹具伪元素依赖于硬编码的背景颜色（在这种情况下为#99bbee;它可以使用rgba(0,0,0,0.2)）。有没有办法重写这个CSS背景图像，以便它更灵活w / r / t背景颜色？

这是一个jsfiddle：https://jsfiddle.net/luken/r69wfwjd/5/

Answer 1

您可以使用伪元素的多个阴影来获得此效果：

＆＃13;

.dnd {
  background: tomato;
  padding: 1em;
  margin: 2em;
  border-radius: 0.25em;
  width: 14em;
  transition: all 0.25s;
  font-family: Arial;
}


.dnd::before {
  content: " ";
  display: inline-block;
  width: 0.5em;
  height: 0.5em;
  margin: 0em 1.5em 0em -1em; 

  background-color: transparent;
  box-shadow: 0.5em -1em 0 gray,
              0.5em -0.25em 0 gray,
              0.5em 0.5em 0 gray,
              0.5em 1.25em 0 gray,
              1.25em -1em 0 gray,
              1.25em -0.25em 0 gray,
              1.25em 0.5em 0 gray,
              1.25em 1.25em 0 gray;
}

＆＃13;

<div class="dnd">
Thing that can be dragged
</div>

＆＃13;

我创建了一个片段，其中网格始终是背景的较暗版本。

有2个对角线渐变，用于创建正方形

＆＃13;

.dnd {
  background: tomato;
  padding: 1em;
  margin: 2em;
  border-radius: 0.25em;
  width: 14em;
  transition: all 0.25s;
  font-family: Arial;
}


.dnd::before {
  content: " ";
  display: inline-block;
  width: 1.5em;
  height: 2em;
  margin: -0.5em 0.75em -0.5em -0.5em; 

  background-color: transparent;
  background-size: 0.5em 0.5em;
  background-position: 0 0, 0.25em 0.25em;

  background-image: 
linear-gradient(45deg, rgba(0,0,0,0.7) 0.1768em, transparent 0.1767em),
linear-gradient(225deg, rgba(0,0,0,0.7) 0.1768em, transparent 0.1767em);
  

}

＆＃13;

<div class="dnd">
Thing that can be dragged
</div>

＆＃13;

Answer 2

我认为最好的选择可能是SVG图像背景。

事实上，如果您在编写答案时查看stackoverflow自己的抓握以扩展textarea（.grippie），它会使用SVG background。

因此，我们的想法是使用带有background和data uri的css url(...)属性作为网址。

SVG代码取自here。

.grip {
  background-size: cover;
  background: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1IiBoZWlnaHQ9IjUiPgo8cmVjdCB3aWR0aD0iMSIgaGVpZ2h0PSIxIiBmaWxsPSIjODg4Ij48L3JlY3Q+Cjwvc3ZnPg==");
  width: 10px;
  height: 15px;
  cursor: grab;
  cursor: -webkit-grab;
  margin: 0.5em;
}

.container {
  display: flex;
  align-items: center;
}

<div class="container" draggable="true">
  <div class="grip"></div>
  <div class="content">A thing with a grip</div>
</div>
<div class="container" draggable="true">
  <div class="grip"></div>
  <div class="content">A thing with a grip</div>
</div>

Answer 3

如果您使用一组简单的点，例如....，然后将它们旋转90度，然后打开文本阴影以重复它们，那么只需很少的CSS即可实现。

i.grip::after
{
content: "....";
display: inline-block;
color: #AAA;
font-style: normal;
font-family: sans-serif;
font-size:15px;
font-weight: bold;
transform: rotate(90deg);
text-shadow: 0px -4px 0px #AAA;
cursor:move;
margin-right:5px;
}

<div><i class="grip"></i> Drag Me By My Handle</div>

握把盒的CSS背景图案

3 个答案: