Javascript Drag and drop for touch devices

joe picture joe · Mar 3, 2011 · Viewed 135.1k times · Source

I am looking for a drag & DROP plugin that works on touch devices.

I would like similar functionality to the jQuery UI plugin which allows "droppable" elements.

The jqtouch plugin supports dragging, but no dropping.

Here is drag & drop that only supports iPhone/iPad.

Can anyone point me in the direction of a drag & drop plugin that works on android/ios?

...Or it might be possible to update the jqtouch plugin for droppability, it already runs on Andriod and IOS.

Thanks!

Answer

ryuutatsuo picture ryuutatsuo · Jun 15, 2011

You can use the Jquery UI for drag and drop with an additional library that translates mouse events into touch which is what you need, the library I recommend is https://github.com/furf/jquery-ui-touch-punch, with this your drag and drop from Jquery UI should work on touch devises

or you can use this code which I am using, it also converts mouse events into touch and it works like magic.

function touchHandler(event) {
    var touch = event.changedTouches[0];

    var simulatedEvent = document.createEvent("MouseEvent");
        simulatedEvent.initMouseEvent({
        touchstart: "mousedown",
        touchmove: "mousemove",
        touchend: "mouseup"
    }[event.type], true, true, window, 1,
        touch.screenX, touch.screenY,
        touch.clientX, touch.clientY, false,
        false, false, false, 0, null);

    touch.target.dispatchEvent(simulatedEvent);
    event.preventDefault();
}

function init() {
    document.addEventListener("touchstart", touchHandler, true);
    document.addEventListener("touchmove", touchHandler, true);
    document.addEventListener("touchend", touchHandler, true);
    document.addEventListener("touchcancel", touchHandler, true);
}

And in your document.ready just call the init() function

code found from Here