I have a draggable div designed by code below. Now I want to put this div in an other div. I want my first div move just inside of second div not allover the web page. I put any where of my code but did not see what I want. the code is:
<!DOCTYPE html>
<html>
<style>
#mydiv {
position: absolute;
z-index: 9;
text-align: center;
border: 1px solid #d3d3d3;
}
#mydivheader {
padding: 10px;
cursor: move;
z-index: 10;
}
@media print {
body{
width: 21cm;
height: 29.7cm;
margin: 0 0mm 0mm 0mm;
/* change the margins as you want them to be. */
}
}
</style>
<body>
<div id="mydiv">
<div id="mydivheader">my text</div>
</div>
<script>
//Make the DIV element draggagle:
dragElement(document.getElementById("mydiv"));
function dragElement(elmnt) {
var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
if (document.getElementById(elmnt.id "header")) {
/* if present, the header is where you move the DIV from:*/
document.getElementById(elmnt.id "header").onmousedown = dragMouseDown;
} else {
/* otherwise, move the DIV from anywhere inside the DIV:*/
elmnt.onmousedown = dragMouseDown;
}
function dragMouseDown(e) {
e = e || window.event;
e.preventDefault();
// get the mouse cursor position at startup:
pos3 = e.clientX;
pos4 = e.clientY;
document.onmouseup = closeDragElement;
// call a function whenever the cursor moves:
document.onmousemove = elementDrag;
}
function elementDrag(e) {
e = e || window.event;
e.preventDefault();
// calculate the new cursor position:
pos1 = pos3 - e.clientX;
pos2 = pos4 - e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
// set the element's new position:
elmnt.style.top = (elmnt.offsetTop - pos2) "px";
elmnt.style.left = (elmnt.offsetLeft - pos1) "px";
}
function closeDragElement() {
/* stop moving when mouse button is released:*/
document.onmouseup = null;
document.onmousemove = null;
}
}
</script>
</body>
</html>
Can anyone help me please? ;-)
CodePudding user response:
Add parent div for the draggable div and set its position
to relative
and set overflow:hidden
for it and set draggable div's position
to absolute
. Also set the dragElement
target to mydivheader
<html>
<style>
#mydiv {
position: absolute;
z-index: 9;
text-align: center;
border: 1px solid #d3d3d3;
}
#mydivheader {
padding: 10px;
cursor: move;
z-index: 10;
position: absolute;
}
#dragParent {
width: 300px;
margin: auto;
overflow: hidden;
height: 200px;
position: relative;
border: 1px solid #e5e5e5;
}
@media print {
body{
width: 21cm;
height: 29.7cm;
margin: 0 0mm 0mm 0mm;
/* change the margins as you want them to be. */
}
}
</style>
<body>
<div id="mydiv">
<div id="dragParent">
<div id="mydivheader">my text</div>
</div>
</div>
<script>
//Make the DIV element draggagle:
dragElement(document.getElementById("mydivheader"));
function dragElement(elmnt) {
var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
if (document.getElementById(elmnt.id "header")) {
/* if present, the header is where you move the DIV from:*/
document.getElementById(elmnt.id "header").onmousedown = dragMouseDown;
} else {
/* otherwise, move the DIV from anywhere inside the DIV:*/
elmnt.onmousedown = dragMouseDown;
}
function dragMouseDown(e) {
e = e || window.event;
e.preventDefault();
// get the mouse cursor position at startup:
pos3 = e.clientX;
pos4 = e.clientY;
document.onmouseup = closeDragElement;
// call a function whenever the cursor moves:
document.onmousemove = elementDrag;
}
function elementDrag(e) {
e = e || window.event;
e.preventDefault();
// calculate the new cursor position:
pos1 = pos3 - e.clientX;
pos2 = pos4 - e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
// set the element's new position:
elmnt.style.top = (elmnt.offsetTop - pos2) "px";
elmnt.style.left = (elmnt.offsetLeft - pos1) "px";
}
function closeDragElement() {
/* stop moving when mouse button is released:*/
document.onmouseup = null;
document.onmousemove = null;
}
}
</script>
</body>
</html>
CodePudding user response:
We could restrict the movement of draggable element within the dimensions of parent element. Thats what is done in below lines of code:
<!DOCTYPE html>
<html>
<style>
#wrapper {
width: 200px;
height: 200px;
background-color: grey;
position: relative;
}
#mydiv {
position: absolute;
z-index: 9;
text-align: center;
border: 1px solid #d3d3d3;
}
#mydivheader {
padding: 10px;
cursor: move;
z-index: 10;
}
@media print {
body{
width: 21cm;
height: 29.7cm;
margin: 0 0mm 0mm 0mm;
/* change the margins as you want them to be. */
}
}
</style>
<body>
<div id="wrapper">
<div id="mydiv">
<div id="mydivheader">my text</div>
</div>
</div>
<script>
//Make the DIV element draggagle:
dragElement(document.getElementById("mydiv"));
function dragElement(elmnt) {
var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
if (document.getElementById(elmnt.id "header")) {
/* if present, the header is where you move the DIV from:*/
document.getElementById(elmnt.id "header").onmousedown = dragMouseDown;
} else {
/* otherwise, move the DIV from anywhere inside the DIV:*/
elmnt.onmousedown = dragMouseDown;
}
function dragMouseDown(e) {
e = e || window.event;
e.preventDefault();
// get the mouse cursor position at startup:
pos3 = e.clientX;
pos4 = e.clientY;
document.onmouseup = closeDragElement;
// call a function whenever the cursor moves:
document.onmousemove = elementDrag;
}
function elementDrag(e) {
e = e || window.event;
e.preventDefault();
// calculate the new cursor position:
pos1 = pos3 - e.clientX;
pos2 = pos4 - e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
let parentElement = elmnt.parentElement;
if(elmnt.offsetTop < 0){elmnt.style.top = "0px"; return;}
if(elmnt.offsetTop > (parentElement.offsetHeight - elmnt.offsetHeight)) {
elmnt.style.top = (parentElement.offsetHeight - elmnt.offsetHeight) "px";
return;
}
if(elmnt.offsetLeft < 0){elmnt.style.left = "0px";return}
if(elmnt.offsetLeft > (parentElement.offsetWidth - elmnt.offsetWidth)){
elmnt.style.left = (parentElement.offsetWidth - elmnt.offsetWidth) "px";
return;
}
// set the element's new position:
elmnt.style.top = (elmnt.offsetTop - pos2) "px";
elmnt.style.left = (elmnt.offsetLeft - pos1) "px";
}
function closeDragElement() {
/* stop moving when mouse button is released:*/
document.onmouseup = null;
document.onmousemove = null;
}
}
</script>
</body>
</html>
The additional js code added is:
let parentElement = elmnt.parentElement;
if(elmnt.offsetTop < 0){elmnt.style.top = "0px"; return;}
if(elmnt.offsetTop > (parentElement.offsetHeight - elmnt.offsetHeight)) {
elmnt.style.top = (parentElement.offsetHeight - elmnt.offsetHeight) "px";
return;
}
if(elmnt.offsetLeft < 0){elmnt.style.left = "0px";return}
if(elmnt.offsetLeft > (parentElement.offsetWidth - elmnt.offsetWidth)){
elmnt.style.left = (parentElement.offsetWidth - elmnt.offsetWidth) "px";
return;
}
These are just a couple of checks, to not change element's position if it goes beyond the dimensions of parent element.