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drag-and-drop.html
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drag-and-drop.html
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>drag-and-drop</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
}
.wrapper {
margin: 0 auto;
min-height: 100vh;
padding-top: 44px;
display: flex;
flex-flow: column nowrap;
align-items: center;
justify-content: center;
}
.textarea {
width: 300px;
height: 150px;
}
.action {
padding: 10px;
}
.action button {
width: 138px;
height: 50px;
color: rgb(136, 136, 136);
background: #FFF;
display: flex;
flex-flow: row nowrap;
justify-content: center;
align-items: center;
position: relative;
border-radius: 8px;
border: 1px solid rgb(102, 102, 102);
}
.action button:focus {
outline: none;
}
.action button::before {
content: '';
width: 134px;
height: 46px;
top: 1px;
right: 1px;
border-radius: 6px;
background: rgb(203, 203, 203);
position: absolute;
}
.action button::after {
content: '★CHECKOUT★';
height: 36px;
width: 124px;
background: rgb(179, 179, 179);
position: absolute;
border-radius: 5px;
border: 1px solid rgb(140, 140, 140);
line-height: 36px;
font-size: 13px;
font-family: Arial, Helvetica, sans-serif;
}
.canvas {
width: 500px;
height: 500px;
position: relative;
border: 1px solid rgb(102, 102, 102);
display: flex;
flex-flow: row nowrap;
justify-content: center;
align-items: center;
}
.rectangle {
position: absolute;
border: 1px solid rgb(136, 136, 136);
cursor: grab;
}
.rectangle span {
display: inline-block;
width: 4px;
height: 4px;
border: 1px solid rgba(0, 0, 0, .8);
position: absolute;
background: #fff;
/* cursor: row-resize; */
}
.rectangle span:nth-child(1) {
top: -6px;
left: -6px;
}
.rectangle span:nth-child(2) {
top: -6px;
right: -6px;
}
.rectangle span:nth-child(3) {
bottom: -6px;
left: -6px;
}
.rectangle span:nth-child(4) {
bottom: -6px;
right: -6px;
}
</style>
</head>
<body>
<div class="wrapper">
<p id="foo">Hello</p>
<div class="action">
<button></button>
</div>
<div class="canvas">
<div class="rectangle" draggable="true"></div>
</div>
</div>
</body>
<script>
var rectangle = document.querySelector('.rectangle');
var elCurLayerX = 50;
var elCurLayerY = 50;
var elCurWidth = 60;
var elCurHeight = 20;
var shiftX = 0, shiftY = 0;
function setElLayer() {
rectangle.style.left = `${elCurLayerX}px`;
rectangle.style.top = `${elCurLayerY}px`;
}
function setElWH() {
rectangle.style.width = `${elCurWidth}px`;
rectangle.style.height = `${elCurHeight}px`;
}
//<span class="angle" draggable="true"></span>
function createAngle() {
var child = rectangle.lastElementChild;
if (child) return;
var n = 0;
while (n < 4) {
var angle = document.createElement('span');
angle.draggable = 'true';
angle.addEventListener('drag', throttle(spanDrag), false);
rectangle.appendChild(angle);
n++;
}
}
function removeAngle() {
var child = rectangle.lastElementChild;
while (child) {
rectangle.removeChild(child);
child = rectangle.lastElementChild;
}
}
function throttle(fn) {
var timer = null;
var isFirstExeced = false;
return (...args) => {
if (!isFirstExeced) {
fn(...args);
isFirstExeced = true;
return;
}
if (timer) {
return;
}
timer = window.requestAnimationFrame(() => {
timer = null;
fn(...args);
});
};
}
function dragStart(e) {
shiftX = e.clientX - rectangle.getBoundingClientRect().left;
shiftY = e.clientY - rectangle.getBoundingClientRect().top;
this.style.opacity = '0';
dragSrcEl = this;
e.dataTransfer.effectAllowed = 'move';
e.dataTransfer.setData('text/html', this.innerHTML);
};
function dragEnter(e) {
//console.log(e)
}
function dragLeave(e) {
e.stopPropagation();
setElLayer();
removeAngle();
}
function spanDrag(e) {
e.stopPropagation();
rectangle.style.opacity = '1';
let x = 0, y = 0;
if (e.offsetX || e.offsetY) {
x = e.offsetX;
y = e.offsetY;
} else if (e.layerX || e.layerY) {
x = e.layerX;
y = e.layerY;
}
// elCurWidth += x;
// elCurWidth += y;
// setElWH();
console.log(x, y)
return false;
}
function drag(e) {
e.stopPropagation();
e.preventDefault();
e.dataTransfer.dropEffect = 'move';
rectangle.style.opacity = '1';
shiftOffset(e);
return false;
}
function dragOver(e) {
e.preventDefault();
e.dataTransfer.dropEffect = 'move';
removeAngle();
return false;
}
function drop(e) {
if (dragSrcEl != this) {
dragSrcEl.innerHTML = this.innerHTML;
this.innerHTML = e.dataTransfer.getData('text/html');
}
return false;
}
function dragEnd(e) {
this.style.opacity = '1';
shiftOffset(e);
}
function shiftOffset(event) {
var x = 0, y = 0;
if (event.offsetX || event.offsetY) {
x = event.offsetX;
y = event.offsetY;
} else if (event.layerX || event.layerY) {
x = event.layerX;
y = event.layerY;
}
elCurLayerX += x - shiftX;
elCurLayerY += y - shiftY;
setElLayer();
}
function mouseenter(e) {
createAngle()
}
function mouseout(e) {
removeAngle()
}
function addEventHover(el) {
el.addEventListener('mouseenter', mouseenter, false);
//el.addEventListener('mouseout', mouseout, false);
}
function addEventsDragAndDrop(el) {
el.addEventListener('dragstart', dragStart, false);
el.addEventListener('dragenter', dragEnter, false);
el.addEventListener('dragover', dragOver, false);
el.addEventListener('dragleave', dragLeave, false);
el.addEventListener('drop', drop, false);
el.addEventListener('drag', throttle(drag), false);
el.addEventListener('dragend', dragEnd, false);
}
setElWH();
setElLayer();
addEventHover(rectangle);
addEventsDragAndDrop(rectangle);
</script>
</html>