I have a dragable div that works in computer very well but today I checked in touch screen and knew that it does not move !!! In my java script code I have onmousemove
, is there any alternative for that in touchscreen? Can any body tell me what to do to solve this ? BTW I want this work in both touch screen and computer, not just in touch screen
My dragable div code is blow.
<div id="wrapper" style="border: 0.1vw solid gray;">
<div id="mydiv">
<img src="image/cs.png">
</div>
</div>
<script>
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)-2) {
elmnt.style.top = (parentElement.offsetHeight - elmnt.offsetHeight-2) + "px";
return;
}
if(elmnt.offsetLeft < 0){elmnt.style.left = "0px";return}
if(elmnt.offsetLeft > (parentElement.offsetWidth - elmnt.offsetWidth)-2){
elmnt.style.left = (parentElement.offsetWidth - elmnt.offsetWidth-2) + "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>