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<div class="list-group">
<div class="list-group-item list-group-item-action flex-column align-items-start dragAction">
<div class="d-flex w-100 justify-content-between">
<h5 class="mb-1">First Item</h5>
<small>3 days ago</small>
</div>
<p class="mb-1">Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.</p>
<small>Donec id elit non mi porta.</small>
</div>
<div class="list-group-item list-group-item-action flex-column align-items-start dragAction">
<div class="d-flex w-100 justify-content-between">
<h5 class="mb-1">Second Item</h5>
<small class="text-muted">3 days ago</small>
</div>
<p class="mb-1">Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.</p>
<small class="text-muted">Donec id elit non mi porta.</small>
</div>
<div class="list-group-item list-group-item-action flex-column align-items-start dragAction">
<div class="d-flex w-100 justify-content-between">
<h5 class="mb-1">Third Item</h5>
<small class="text-muted">3 days ago</small>
</div>
<p class="mb-1">Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.</p>
<small class="text-muted">Donec id elit non mi porta.</small>
</div>
</div>
* {
user-select: none;
}
body {
margin: 0;
padding: 0;
height: 100vh;
}
.ghost {
position: absolute;
background: #eee;
border: 3px dashed #bbb;
opacity: .5;
}
.list-group {
max-width: 500px;
display: block;
}
.dragAction {
transform-origin: 50% 50%;
overflow: hidden;
}
console.clear();
gsap.registerPlugin(Draggable);
// Variable for controlling the Size transformation
var isPaper = false;
// jQuery Variable declarations
var body = $("body"),
dragItem = $(".dragAction");
// Create Draggable Event from GSAP library/plugin
Draggable.create(dragItem, {
bounds: body,
edgeResistance: 1, // I don't believe this works unless InertiaPlugin is active ???
inertia: true, // ^^ Same
type: "x,y",
onPress: function() {
// Set a start x and y for when pointer is clicked
this.pointerXstart = this.pointerX;
this.pointerYstart = this.pointerY;
// Call function to build an html element that will be left behind on drag
stampImprint(this);
},
onDragStart: function() {
transformItem(this);
},
onDragEnd: function() {
// Return the drag item to start when dropped
playReturnAnimation(this);
}
});
// Function to create "ghost" element to hold place of dragged element
function stampImprint(item) {
var bounds = item.target.getBoundingClientRect();
var ghost = document.createElement("DIV");
ghost.className = "ghost"
ghost.style.left = bounds.x + "px";
ghost.style.top = bounds.y + "px";
ghost.style.width = bounds.width + "px";
ghost.style.height = bounds.height + "px";
document.body.appendChild(ghost);
}
// Remove the "ghost" elements when dragged element is returned
function removeImprints() {
document.querySelectorAll(".ghost").forEach(e => e.parentNode.removeChild(e));
isPaper = false;
}
// Set up Timeline and Play animation for returning item to start of drag
function playReturnAnimation(item){
gsap.to(item.target, {duration: 0.3, x: 0, y: 0, onComplete: removeImprints});
}
function transformItem(item) {
const pointerOffset = MotionPathPlugin.convertCoordinates(window, item.target, {x: item.pointerX, y: item.pointerY}), // converts the pointer's coordinates from the window to the target's local coordinate system.
width = item.target.offsetWidth,
height = item.target.offsetHeight,
xRatio = pointerOffset.x / width,
yRatio = pointerOffset.y / height;
const tween = gsap.to(item.target, {
left: (width - 70) * xRatio,
top: (height - 85) * yRatio,
width: 70,
height: 85,
borderRadius: "10px"
});
tween.progress(1); // jump to the end so that we can update() the Draggable's bounds according to the new size
item.update(true); // update the bounds
tween.progress(0); // now revert and play from the beginning
gsap.to(item.target.children, {
opacity: 0,
duration: 0.3,
stagger: 0.2,
});
isPaper = !isPaper;
}
Also see: Tab Triggers