I have a set of buttons arranged in a circle, the button on the right hand side is the active
button and emits a pulse animation. When another button is clicked, the containing div rotates so that the button you click is on the right, and becomes the active
button
This is done using CSS transform: rotate(x);
and transition
When I click the images below labelled 'C' I want the div to rotate clockwise, and 'A' anticlockwise. But this doesn't happen because of how I've done the CSS rotations, let's say the circle has rotated -300deg and then changes to a 180deg rotation, it will spin 'the long way round' instead of taking the shortest route.
I need to rotate the div using JavaScript, then just add or subtract values from the rotation depending on what button I click. I've tried looking for ways to do this, but no luck so far.
Here's a fiddle showing my current progress
You can add data-rotate
attributes to the buttons. Their values will be used add or subtract from the current rotate value.
Default HTML:
<div class="col-lg" id="wheel-container">
<div class="wheel" data-state="1">
<ul>
<li><div><a class="btn active" data-icon="1"><div></div></a></div></li>
<li><div><a class="btn" data-icon="2" data-rotate="-60"><div></div></a></div></li>
<li><div><a class="btn" data-icon="3" data-rotate="-120"><div></div></a></div></li>
<li><div><a class="btn" data-icon="4" data-rotate="180"><div></div></a></div></li>
<li><div><a class="btn" data-icon="5" data-rotate="120"><div></div></a></div></li>
<li><div><a class="btn" data-icon="6" data-rotate="60"><div></div></a></div></li>
</ul>
</div>
</div>
Remove this part of CSS. You no longer need it:
/* .wheel[data-state="1"] {
transform: rotateZ(0deg);
}
.wheel[data-state="2"] {
transform: rotateZ(-60deg);
}
.wheel[data-state="3"] {
transform: rotateZ(-120deg);
}
.wheel[data-state="4"] {
transform: rotateZ(180deg);
}
.wheel[data-state="5"] {
transform: rotateZ(120deg);
}
.wheel[data-state="6"] {
transform: rotateZ(60deg);
} */
Now, the jQuery code. It checks the data-rotate
value of the clicked element to add/subtract the value from rotate
variable. Then, it checks the position, and redistributes the values for each data-rotate
appropriately.
var btns = $('.btn');
var rotate = 0;
$('.btn').on('click', function(e){
e.preventDefault();
if ($(this).hasClass('active')) {
//Do nothing
} else {
var rotateAdd = Number($(this).data('rotate'));
rotate += rotateAdd;
$('.wheel').css({'transform' : 'rotate(' + rotate + 'deg)'});
// get n value
var icon = $(this).data('icon');
var n = icon - 1;
// loop to rearrange the values
for (var i = 1; i < btns.length; i++) {
n++;
if (n === btns.length) {
n = 0;
}
// apply rotate data again
if (i == 1) {
$(btns[n]).data('rotate', '-60');
} else if (i == 2) {
$(btns[n]).data('rotate', '-120');
} else if (i == 3) {
$(btns[n]).data('rotate', '180');
} else if (i == 4) {
$(btns[n]).data('rotate', '120');
} else if (i == 5) {
$(btns[n]).data('rotate', '60');
}
}
// Hide other dropdowns
$('.active').removeClass('active');
// Open this dropdown
$(this).addClass('active');
}
});
working snippet :
var btns = $('.btn'); var rotate = 0; $('.btn').on('click', function(e) { e.preventDefault(); if ($(this).hasClass('active')) { //Do nothing } else { var rotateAdd = Number($(this).data('rotate')); rotate += rotateAdd; $('.wheel').css({ 'transform': 'rotate(' + rotate + 'deg)' }); // get n value var icon = $(this).data('icon'); var n = icon - 1; // loop to rearrange the values for (var i = 1; i < btns.length; i++) { n++; if (n === btns.length) { n = 0; } // apply rotate data again if (i == 1) { $(btns[n]).data('rotate', '-60'); } else if (i == 2) { $(btns[n]).data('rotate', '-120'); } else if (i == 3) { $(btns[n]).data('rotate', '180'); } else if (i == 4) { $(btns[n]).data('rotate', '120'); } else if (i == 5) { $(btns[n]).data('rotate', '60'); } } // Hide other dropdowns $('.active').removeClass('active'); // Open this dropdown $(this).addClass('active'); } });
#wheel-container { flex: 1 1 100%; max-width: 100%; position: relative; } .wheel { width: calc(50vw - 1.875rem); position: relative; margin: auto; } .wheel ul { list-style: none; padding: 0; margin: 0; width: 100%; padding-top: 100%; position: relative; } .wheel ul li { padding: 0; margin: 0; width: 50%; height: 50%; position: absolute; left: 50%; top: 50%; transform-origin: 0 50%; } .wheel ul li>div { width: 100%; height: 100%; position: relative; } .wheel ul li [data-icon] { width: 50%; height: 50%; border-radius: 50%; position: absolute; right: 0; top: 50%; transform-origin: 50% 50%; transform: translateY(-50%); cursor: pointer; padding: 0; } .wheel ul li [data-icon]>div { width: 100%; height: 100%; position: relative; overflow: visible; z-index: -10; } .wheel ul li [data-icon]>div::after { content: ''; position: absolute; top: 0; left: 0; bottom: 0; right: 0; border-radius: 50%; } .wheel ul li [data-icon].active>div::before { content: ''; position: absolute; width: 100%; height: 100%; top: 50%; left: 50%; background: rgba(0, 173, 239, 0.5); transform: translate(-50%, -50%); animation-name: pulse; animation-timing-function: ease-in-out; animation-iteration-count: infinite; animation-duration: 3s; animation-direction: alternate; border-radius: 50%; } @keyframes pulse { 0% { width: 100%; height: 100%; opacity: 0; } 50% { width: calc(100% + 1rem); height: calc(100% + 1rem); opacity: 1; } 100% { width: 100%; height: 100%; opacity: 0; } } .wheel ul li:nth-child(1) { transform: translateY(-50%); } .wheel ul li:nth-child(2) { transform: translateY(-50%)rotateZ(60deg); } .wheel ul li:nth-child(3) { transform: translateY(-50%)rotateZ(120deg); } .wheel ul li:nth-child(4) { transform: translateY(-50%)rotateZ(180deg); } .wheel ul li:nth-child(5) { transform: translateY(-50%)rotateZ(240deg); } .wheel ul li:nth-child(6) { transform: translateY(-50%)rotateZ(300deg); } .wheel[data-state] { transition: transform 1s ease-in-out; transform-origin: 50% 50%; } .wheel[data-state="1"] { transform: rotateZ(0deg); } .wheel[data-state="2"] { transform: rotateZ(-60deg); } .wheel[data-state="3"] { transform: rotateZ(-120deg); } .wheel[data-state="4"] { transform: rotateZ(180deg); } .wheel[data-state="5"] { transform: rotateZ(120deg); } .wheel[data-state="6"] { transform: rotateZ(60deg); } .wheel ul li:nth-child(1) [data-icon]>div::after { background: url('https://www.fillmurray.com/200/200') 0 0 / contain no-repeat; } .wheel ul li:nth-child(2) [data-icon]>div::after { background: url('https://www.fillmurray.com/200/200') 0 0 / contain no-repeat; transform: rotateZ(-60deg); } .wheel ul li:nth-child(3) [data-icon]>div::after { background: url('https://www.fillmurray.com/200/200') 0 0 / contain no-repeat; transform: rotateZ(-120deg); } .wheel ul li:nth-child(4) [data-icon]>div::after { background: url('https://www.fillmurray.com/200/200') 0 0 / contain no-repeat; transform: rotateZ(-180deg); } .wheel ul li:nth-child(5) [data-icon]>div::after { background: url('https://www.fillmurray.com/200/200') 0 0 / contain no-repeat; transform: rotateZ(-240deg); } .wheel ul li:nth-child(6) [data-icon]>div::after { background: url('https://www.fillmurray.com/200/200') 0 0 / contain no-repeat; transform: rotateZ(-300deg); }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div class="col-lg" id="wheel-container"> <div class="wheel" data-state="1"> <ul> <li> <div> <a class="btn active" data-icon="1"> <div></div> </a> </div> </li> <li> <div> <a class="btn" data-icon="2" data-rotate="-60"> <div></div> </a> </div> </li> <li> <div> <a class="btn" data-icon="3" data-rotate="-120"> <div></div> </a> </div> </li> <li> <div> <a class="btn" data-icon="4" data-rotate="180"> <div></div> </a> </div> </li> <li> <div> <a class="btn" data-icon="5" data-rotate="120"> <div></div> </a> </div> </li> <li> <div> <a class="btn" data-icon="6" data-rotate="60"> <div></div> </a> </div> </li> </ul> </div> </div>
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