堆栈内存溢出
  繁体   English   中英

拖动一张图像使另一张图像拖动

[英]Dragging one image makes other image to drag

 原文  2019-02-06 07:29:25  1   5    javascript/ html/ css/ svg/ css-mask

问题描述

当我在 mask1 中拖动上传图像的右侧部分时，在拖动 mask2 中上传的图像时，但这不应该发生....

这是视频链接

此外，如果我仅在蒙版 1 中上传图像并尝试拖动，图像将消失，但如果我在两个蒙版中上传图像，则图像不会消失

视频链接2

代码笔： https ://codepen.io/kidsdial/pen/PVJQrz

<input type="file" id="fileupa" />
<input type="file" id="fileupb" />

<div class="container">

<div class="minaimg masked-imga"   ondragover="onDragOver(event)"ondragover="onDragOver(event)" >
  <div draggable="true" ondragstart="onDragStart(event)" id="uploadedImg">
    <div class="minaimga">

      <img id="target_imga"  alt="">

      <div></div>

    </div>
  </div>
</div>

<div class="minaimg masked-imgb"   ondragover="onDragOverSec(event)"ondragover="onDragOver(event)" >
  <div draggable="true" ondragstart="onDragStart(event)" id="uploadedImg2">
    <div class="minaimgb">

      <img id="target_imgb"  alt="">

      <div></div>

    </div>
  </div>
</div>

</div>

<style>

.container {
    border: 1px solid #DDDDDD;
    width: 612px;
    height: 612px;
    position:relative;
    background:red;
}

.masked-imga

{

  -webkit-mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart1.png);
  mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart1.png);
  -webkit-mask-position: center center;
  mask-position: center center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;  

  width: 259px;
  height: 278px;
  position: absolute;
    top: 221px;
    left: 23px;

}



.masked-imgb 
{

  -webkit-mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart2.png);
  mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart2.png);
  -webkit-mask-position: center center;
  mask-position: center center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;  

    width: 416px;
    height: 388px;

    position: absolute;
    top: 111px;
    left: 173px;

}

.minaimga
{
  display: block;
  background-color: white;
  height: 278px;
}

.minaimgb 
{
  display: block;
  background-color: white;
  height: 388px;
}

</style>


<script>

fileupa.onchange = e => {
 target_imga.src = URL.createObjectURL(fileupa.files[0]);   
}

fileupb.onchange = e => {
 target_imgb.src = URL.createObjectURL(fileupb.files[0]);   
}

let prevX = 0, prevY = 0,translateX = 0, translateY = 0, scale = 1, zoomFactor = 0.1;

function onDragStart(evt) {
  if (evt.dataTransfer && evt.dataTransfer.setDragImage) {
evt.dataTransfer.setDragImage(evt.target.nextElementSibling, 0, 0);
  }
  prevX = evt.clientX;
  prevY = evt.clientY;
}

function onDragOver(evt) {
  translateX += evt.clientX - prevX;
  translateY += evt.clientY - prevY;
  prevX = evt.clientX;
  prevY = evt.clientY;
  updateStyle();
}

function updateStyle() 
{ 
let transform = "translate(" +translateX+ "px, "+ translateY + "px) scale("+scale+")"; 

if(document.querySelector('#uploadedImg img'))
document.querySelector('#uploadedImg img').style.transform = transform;
}

function onDragOverSec(evt) {
  translateX += evt.clientX - prevX;
  translateY += evt.clientY - prevY;
  prevX = evt.clientX;
  prevY = evt.clientY;
  updateStyleSec();
}

function updateStyleSec() 
{ 
let transform = "translate(" +translateX+ "px, "+ translateY + "px) scale("+scale+")"; 

if(document.querySelector('#uploadedImg2 img'))
document.querySelector('#uploadedImg2 img').style.transform = transform;
}




</script>

编辑

是因为这两个图像水平和垂直重叠吗？

在此处输入图片说明

在此处输入图片说明

编辑 2

对于某些问题仍然不清楚，在下面的图像中，如果用户尝试拖动 B 部分，B 部分，C 部分和 D 部分也一起拖动，但这不应该发生.....

在此处输入图片说明

5 个解决方案

解决方案1
 2 已采纳  2019-02-09 14:59:50

这是我的解决方案。 您必须跟踪哪个元素开始拖动。

HTML

<input type="file" id="fileupa" />
<input type="file" id="fileupb" />

<div class="container">

<div class="minaimg masked-imga"   ondragover="onDragOver(event)"ondragover="onDragOver(event)" >
  <div draggable="true" ondragstart="onDragStart(event)" id="uploadedImg">
    <div class="minaimga">
      <div id="dragBox1" class="dragFromHere" style="left:70px;top:120px;"></div>
      <img id="target_imga"  alt="">

      <div></div>

    </div>
  </div>
</div>

<div class="minaimg masked-imgb" ondragover="onDragOverSec(event)" ondragover="onDragOver(event)" ondragend="dragEnd()">
  <div draggable="true" ondragstart="onDragStart(event)" id="uploadedImg2">
    <div class="minaimgb">
      <div id="dragBox2" class="dragFromHere" style="left:160px;top:160px;"></div>
      <img id="target_imgb"  alt="">

      <div></div>

    </div>
  </div>
</div>

</div>

JS

var elemInDrag = null;
var canInitdrag = false;

fileupa.onchange = e => {
 target_imga.src = URL.createObjectURL(fileupa.files[0]);   
}

fileupb.onchange = e => {
 target_imgb.src = URL.createObjectURL(fileupb.files[0]);   
}

let prevX = 0, prevY = 0,translateX = 0, translateY = 0, scale = 1, zoomFactor = 0.1;

function dragEnd() {
  elemInDrag = null; 
  canInitdrag = false;
}

function onDragStart(evt) {
  var x = evt.clientX, y = evt.clientY;
  var divRect1 = document.getElementById('dragBox1').getBoundingClientRect();
  var divRect2 = document.getElementById('dragBox2').getBoundingClientRect();

  if (event.clientX >= divRect1.left && event.clientX <= divRect1.right &&
      event.clientY >= divRect1.top && event.clientY <= divRect1.bottom) {
      // Mouse is inside element.
      canInitdrag = true;
    }

  if (event.clientX >= divRect2.left && event.clientX <= divRect2.right &&
      event.clientY >= divRect2.top && event.clientY <= divRect2.bottom) {
      // Mouse is inside element.
       canInitdrag = true;
    }
  if (canInitdrag) {
  if ((typeof evt.target.id!='undefined') || (evt.target.id==elemInDrag)){
    elemInDrag = evt.target.id;
  if (evt.dataTransfer && evt.dataTransfer.setDragImage) {
    evt.dataTransfer.setDragImage(evt.target.nextElementSibling, 0, 0);
  }
  prevX = evt.clientX;
  prevY = evt.clientY;
  }
  }
}

function onDragOver(evt) {
  if ((typeof evt.target.id!='undefined') && (evt.target.id==elemInDrag)){
  translateX += evt.clientX - prevX;
  translateY += evt.clientY - prevY;
  prevX = evt.clientX;
  prevY = evt.clientY;
  updateStyle();
  }
}

function updateStyle() 
{ 
let transform = "translate(" +translateX+ "px, "+ translateY + "px) scale("+scale+")"; 

if(document.querySelector('#uploadedImg img'))
document.querySelector('#uploadedImg img').style.transform = transform;
}

function onDragOverSec(evt) {
  if ((typeof evt.target.id!='undefined') && (evt.target.id==elemInDrag)){
  translateX += evt.clientX - prevX;
  translateY += evt.clientY - prevY;
  prevX = evt.clientX;
  prevY = evt.clientY;
  updateStyleSec();
  }
}

function updateStyleSec() 
{ 
let transform = "translate(" +translateX+ "px, "+ translateY + "px) scale("+scale+")"; 

if(document.querySelector('#uploadedImg2 img'))
document.querySelector('#uploadedImg2 img').style.transform = transform;
}

CSS

.container {
    border: 1px solid #DDDDDD;
    width: 612px;
    height: 612px;
    position:relative;
    background:red;
}

.masked-imga

{

  -webkit-mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart1.png);
  mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart1.png);
  -webkit-mask-position: center center;
  mask-position: center center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;  

  width: 259px;
  height: 278px;
  position: absolute;
    top: 221px;
    left: 23px;

}

.dragFromHere {
  border:thin;
  border-style:dotted;
  border-color:red;
  display:inline-block;
  width:80px;
  height:80px;
  position:absolute;
  z-index:99;
  pointer-events:none;
}


.masked-imgb 
{

  -webkit-mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart2.png);
  mask-image: url(http://139.59.24.243/ecom1/site/test/images/heart2.png);
  -webkit-mask-position: center center;
  mask-position: center center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;  

    width: 416px;
    height: 388px;
    position: absolute;
    top: 111px;
    left: 173px;
}

.minaimga
{
  display: block;
  background-color: white;
  height: 278px;
}

.minaimgb 
{
  display: block;
  background-color: white;
  height: 388px;
}

这样，拖动只会在您开始拖动操作的图像上起作用，并且不会在您跨过该区域时涉及其他元素。

将此与CSS剪辑路径结合以排除两个图像的重叠，您将解决内角问题。

编辑：现在只能从红色方块内部开始拖动。这些是元素不重叠的“安全区域”。 必须为使用的每个蒙版图像组合定义安全区。

解决方案2
 0  2019-02-06 08:26:47

为什么要两次定义 ondrover 属性？ 无论如何，在定义 onDragOverSec 之后，您稍后将其重写为 onDragOver，从而触发您用于第一个元素的事件处理程序。

<div class="minaimg masked-imgb"   ondragover="onDragOverSec(event)"ondragover="onDragOver(event)" >

作为旁注，通过将两种情况之间的差异作为变量传递给同一个函数，而不是每个函数的两个副本，可以将这段代码重写为更DRY

解决方案3
 0  2019-02-08 08:32:29

您可以根据需要使用 CSS clip-path 属性来切断 HTML 元素的角。 通过工具很容易获得正确的价值，请谷歌“css clip-path maker”。

.masked-imga
    -webkit-clip-path: polygon(0 9%, 0 0, 35% 0%, 49% 0, 56% 27%, 73% 46%, 100% 61%, 100% 100%, 65% 100%, 0 100%, 0 100%, 0 30%);
    clip-path: polygon(0 9%, 0 0, 35% 0%, 49% 0, 56% 27%, 73% 46%, 100% 61%, 100% 100%, 65% 100%, 0 100%, 0 100%, 0 30%);

.masked-imgb
    -webkit-clip-path: polygon(0 9%, 0 0, 35% 0%, 100% 0, 100% 0, 100% 0, 100% 61%, 100% 100%, 58% 100%, 40% 90%, 18% 63%, 0 39%);
    clip-path: polygon(0 9%, 0 0, 35% 0%, 100% 0, 100% 0, 100% 0, 100% 61%, 100% 100%, 58% 100%, 40% 90%, 18% 63%, 0 39%);

解决方案4
 0  2019-02-09 06:21:21

因为元素相互重叠，我认为最好的修复方法是设置z-index 。 它并不完美，在元素之间切换时，您必须首先拖动未重叠的元素。 

 fileupa.onchange = e => { target_imga.src = URL.createObjectURL(fileupa.files[0]); // set z-index document.querySelector(".masked-imga").style = 'z-index: ' + zIndex++; } fileupb.onchange = e => { target_imgb.src = URL.createObjectURL(fileupb.files[0]); // set z-index document.querySelector(".masked-imgb").style = 'z-index: ' + zIndex++; } let prevX = 0, prevY = 0, translateX = 0, translateY = 0, scale = 1, zoomFactor = 0.1; let zIndex = 1; function onDragStart(evt) { // set z-index of the parent element evt.target.closest(".minaimg").style = 'z-index: ' + zIndex++; if (evt.target.nextElementSibling && // fix if .nextElementSibling is not element evt.dataTransfer && evt.dataTransfer.setDragImage) { evt.dataTransfer.setDragImage(evt.target.nextElementSibling, 0, 0); } prevX = evt.clientX; prevY = evt.clientY; } function onDragOver(evt) { translateX += evt.clientX - prevX; translateY += evt.clientY - prevY; prevX = evt.clientX; prevY = evt.clientY; updateStyle(); } function updateStyle() { let transform = "translate(" + translateX + "px, " + translateY + "px) scale(" + scale + ")"; if (document.querySelector('#uploadedImg img')) document.querySelector('#uploadedImg img').style.transform = transform; } function onDragOverSec(evt) { translateX += evt.clientX - prevX; translateY += evt.clientY - prevY; prevX = evt.clientX; prevY = evt.clientY; updateStyleSec(); } function updateStyleSec() { let transform = "translate(" + translateX + "px, " + translateY + "px) scale(" + scale + ")"; if (document.querySelector('#uploadedImg2 img')) document.querySelector('#uploadedImg2 img').style.transform = transform; }
 .container { border: 1px solid #DDDDDD; width: 612px; height: 612px; position: relative; background: red; } .masked-imga { -webkit-mask-image: url(https://i.postimg.cc/y8T0y7zY/heart1.png); mask-image: url(https://i.postimg.cc/y8T0y7zY/heart1.png); -webkit-mask-position: center center; mask-position: center center; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; width: 259px; height: 278px; position: absolute; top: 221px; left: 23px; } .masked-imgb { -webkit-mask-image: url(https://i.postimg.cc/xdTMsB0G/heart2.png); mask-image: url(https://i.postimg.cc/xdTMsB0G/heart2.png); -webkit-mask-position: center center; mask-position: center center; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; width: 416px; height: 388px; position: absolute; top: 111px; left: 173px; } .minaimga { display: block; background-color: white; height: 278px; } .minaimgb { display: block; background-color: white; height: 388px; }
 <input type="file" id="fileupa" /> <input type="file" id="fileupb" /> <div class="container"> <div class="minaimg masked-imga" ondragover="onDragOver(event)"> <div draggable="true" ondragstart="onDragStart(event)" id="uploadedImg"> <div class="minaimga"> <img id="target_imga" alt=""> <div></div> </div> </div> </div> <div id="masked_imgb" class="minaimg masked-imgb" ondragover="onDragOverSec(event)"> <div draggable="true" ondragstart="onDragStart(event)" id="uploadedImg2"> <div class="minaimgb"> <img id="target_imgb" alt=""> <div></div> </div> </div> </div> </div>

演示图片

在此处输入图片说明

解决方案5
 0  2019-02-09 14:46:29

我认为这就是你要找的：

代码笔

 fileupa.onchange = e => { target_imga.src = URL.createObjectURL(fileupa.files[0]); } fileupb.onchange = e => { target_imgb.src = URL.createObjectURL(fileupb.files[0]); } let prevX = 0, prevY = 0,translateX = 0, translateY = 0, scale = 1, zoomFactor = 0.1; let current_elm = null; function onDragStart(evt) { if (current_elm != null) return; if (evt.dataTransfer && evt.dataTransfer.setDragImage) { evt.dataTransfer.setDragImage(evt.target.nextElementSibling, 0, 0); current_elm = evt.target; } prevX = evt.clientX; prevY = evt.clientY; } function dragEnd(event) { current_elm=null; } function onDragOver(evt) { translateX += evt.clientX - prevX; translateY += evt.clientY - prevY; prevX = evt.clientX; prevY = evt.clientY; updateStyle() } function updateStyle() { let transform = "translate(" +translateX+ "px, "+ translateY + "px) scale("+scale+")"; if(current_elm != null) current_elm.style.transform = transform; }
 .container { border: 1px solid #DDDDDD; width: 612px; height: 612px; position: relative; background: red; } .masked-imga { -webkit-mask-image: url(https://i.postimg.cc/y8T0y7zY/heart1.png); mask-image: url(https://i.postimg.cc/y8T0y7zY/heart1.png); -webkit-mask-position: center center; mask-position: center center; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; width: 259px; height: 278px; position: absolute; top: 221px; left: 23px; } .masked-imgb { -webkit-mask-image: url(https://i.postimg.cc/xdTMsB0G/heart2.png); mask-image: url(https://i.postimg.cc/xdTMsB0G/heart2.png); -webkit-mask-position: center center; mask-position: center center; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; width: 416px; height: 388px; position: absolute; top: 111px; left: 173px; } .minaimga { display: block; background-color: white; height: 278px; } .minaimgb { display: block; background-color: white; height: 388px; }
 <input type="file" id="fileupa" /> <input type="file" id="fileupb" /> <div class="container" ondragover="onDragOver(event)" > <div class="minaimg masked-imga"> <div draggable="true" ondragstart="onDragStart(event)" ondragend="dragEnd(event)" id="uploadedImg"> <div class="minaimga"> <img id="target_imga" alt=""> <div></div> </div> </div> </div> <div class="minaimg masked-imgb"> <div draggable="true" ondragstart="onDragStart(event)" ondragend="dragEnd(event)" id="uploadedImg2"> <div class="minaimgb"> <img id="target_imgb" alt=""> <div></div> </div> </div> </div> </div>

在这里，我只是在.container div 上定义了ondragover ，它是两个图像的容器。 在onDragStart函数内部，我将当前拖动的元素保存到current_elm以便在onDragStart的另一个调用中，直到current_elm变为 null（如果它不为 null，则表示已经有另一个元素正在拖动， onDragStart不会发生任何事情）我们不应该考虑要拖动的新元素。）而且在dragEnd回调函数中，我们应该将current_elm设置为 null 以在需要时启用新的拖动过程（我希望你明白我的意思；）） current_elm另一个优点是不需要定义两种类型的updateStyle函数，因为您可以使用current_elm更新相关元素。

让我知道是否需要更多解释。

暂无
暂无

声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

相关问题 拖动时拖放更改图像 拖放事件不起作用-将图像拖动到另一图像上？ 在拖动一个jqueryUI可拖动元素时，触发对其他多个元素的拖动 在 Phaser 3 v3.54.0 中拖放图像不拖动 如何通过拖动另一个图像来改变图像？ 在 Microsoft Windows 上，当使用 HTML5 拖放时，在拖放过程中，我确实看到了拖放图标（重影） 编辑其他Kinetic.Image时拖动Kinetic.Image Firefox 防止图片拖拽 在图像上拖动矩形 Kineticjs Group图片拖动
相关标签
 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM