How to create a radial menu in CSS?
Ana's response is kick ass! That's some serious CSS-fu.
My solution may not be quite what you are hoping for, but it's another possible solution. I'm working on a compass interface right now that has a similar style of arc shaped buttons. I decided to develop it using Raphael and SVG.
I created an arc shape in Illustrator, exported the SVG for it, grabbed the path definition for the arc from the exported SVG file, and used Raphael to build my interface with it.
Here's a JSFiddle of it.
Here's the JavaScript:
var arc = {
fill: '#333',
stroke: '#333',
path: 'M53.286,44.333L69.081,7.904C48.084-1.199,23.615-2.294,0.648,6.78l14.59,36.928C28.008,38.662,41.612,39.27,53.286,44.333z'
};
var paper = Raphael(document.getElementById("notepad"), 500, 500);
var arcDegrees = 45;
var centerX = 210;
var centerY = 210;
var compassRadius = 68;
var currentlyActive = 45;
var directions = [
{label:'N', degrees:0, rotatedDegrees:270},
{label:'NE', degrees:45, rotatedDegrees:315},
{label:'E', degrees:90, rotatedDegrees:0},
{label:'SE', degrees:135, rotatedDegrees:45},
{label:'S', degrees:180, rotatedDegrees:90},
{label:'SW', degrees:225, rotatedDegrees:135},
{label:'W', degrees:270, rotatedDegrees:180},
{label:'NW', degrees:315, rotatedDegrees:225}
];
function arcClicked()
{
var label = $(this).data('direction-label');
$("#activeArc").attr('id', null);
$(this).attr('id', 'activeArc');
}
for (i = 0; i < 360; i += arcDegrees) {
var direction = _.find(directions, function(d) { return d.rotatedDegrees == i; });
var radians = i * (Math.PI / 180);
var x = centerX + Math.cos(radians) * compassRadius;
var y = centerY + Math.sin(radians) * compassRadius;
var newArc = paper.path(arc.path);
// newArc.translate(x, y);
// newArc.rotate(i + 89);
newArc.transform('T' + x + ',' + y + 'r' + (i + 89));
if (direction.degrees == currentlyActive) {
$(newArc.node).attr('id', 'activeArc');
}
$(newArc.node)
.attr('class', 'arc')
.data('direction-label', direction.label)
.on('click', arcClicked);
}
Here's the related CSS:
#notepad {
background: #f7f7f7;
width: 500px;
height: 500px;
}
.arc {
fill: #999;
stroke: #888;
cursor: pointer;
}
.arc:hover {
fill: #777;
stroke: #666;
}
#activeArc {
fill: #F18B21 !important;
stroke: #b86a19 !important;
}
Another very good way would be to use JavaScript for the positioning.
DEMO + TUTORIAL on making an animated radial menu
A pro to this method is that you can use any number of elements and it will keep positioning them radially, without having to change any of your CSS.
The JavaScript in question is:
var items = document.querySelectorAll('.circle a');
for(var i = 0, l = items.length; i < l; i++) {
items[i].style.left = (50 - 35*Math.cos(-0.5 * Math.PI - 2*(1/l)*i*Math.PI)).toFixed(4) + "%";
items[i].style.top = (50 + 35*Math.sin(-0.5 * Math.PI - 2*(1/l)*i*Math.PI)).toFixed(4) + "%";
}
document.querySelector('.menu-button').onclick = function(e) {
e.preventDefault(); document.querySelector('.circle').classList.toggle('open');
}
Almost 3 years later, I finally made the time to revisit this and post an improved version. You can still view the original answer at the end for reference.
While SVG may be the better choice, especially today, my goal with this was to keep it just HTML and CSS, no JS, no SVG, no images (other than the background on the root element).
2015 demo
Screenshots
Chrome 43:
Firefox 38:
IE 11:
Code
The HTML is pretty simple. I'm using the checkbox hack to reveal/ hide the menu.
<input type='checkbox' id='t'/>
<label for='t'>✰</label>
<ul>
<li><a href='#'>☀</a></li>
<li><a href='#'>☃</a></li>
<li><a href='#'>☁</a></li>
</ul>
I'm using Sass to keep this logical and make it easier to change things if needed. Heavily commented.
$d: 2em; // diameter of central round button
$r: 16em; // radius of menu
$n: 3; // must match number of list items in DOM
$exp: 3em; // menu item height
$tip: .75em; // dimension of tip on middle menu item
$w: .5em; // width of ends
$cover-dim: 2*($r - $exp); // dimension of the link cover
$angle: 15deg; // angle for a menu item
$skew-angle: 90deg - $angle; // how much to skew a menu item to $angle
$scale-factor: cos($skew-angle); // correction factor - see vimeo.com/98137613 from min 15
$off-angle: .125deg; // offset angle so we have a little space between menu items
// don't show the actual checkbox
input {
transform: translate(-100vw); // move offscreen
visibility: hidden; // avoid paint
}
// change state of menu to revealed on checking the checkbox
input:checked ~ ul {
transform: scale(1);
opacity: .999;
// ease out back from easings.net/#easeOutBack
transition: .5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
// position everything absolutely such that their left bottom corner
// is in the middle of the screen
label, ul, li {
position: absolute;
left: 50%; bottom: 50%;
}
// visual candy styles
label, a {
color: #858596;
font: 700 1em/ #{$d} sans-serif;
text-align: center;
text-shadow: 0 1px 1px #6c6f7e;
cursor: pointer;
}
label {
z-index: 2; // place it above the menu which has z-index: 1
margin: -$d/2; // position correction such that it's right in the middle
width: $d; height: $d;
border-radius: 50%;
box-shadow: 0 0 1px 1px white,
0 .125em .25em #876366,
0 .125em .5em #876366;
background: radial-gradient(#d4c7c5, #e5e1dd);
}
ul {
z-index: 1;
margin: -$r + $exp + 1.5*$d 0; // position correction
padding: 0;
list-style: none;
transform-origin: 50% (-$r + $exp);
transform: scale(.001); // initial state: scaled down to invisible
will-change: transform; // better perf on transitioning transform
opacity: .001; // initial state: transparent
filter: drop-shadow(0 .125em .25em #847c77)
drop-shadow(0 .125em .5em #847c77);
// ease in back, also from easings.net
transition: .5s cubic-bezier(0.6, -0.28, 0.735, 0.045);
// menu ends
&:before, &:after {
position: absolute;
margin: -$exp (-$w/2);
width: $w; height: $exp;
transform-origin: 50% 100%;
background: linear-gradient(#ddd, #c9c4bf);
content: '';
}
&:before {
border-radius: $w 0 0 $w;
transform: rotate(-.5*$n*$angle)
translate(-$w/2, -$r + $exp);
box-shadow: inset 1px 0 1px #eee;
}
&:after {
border-radius: 0 $w $w 0;
transform: rotate(.5*$n*$angle)
translate($w/2, -$r + $exp);
box-shadow: inset -1px 0 1px #eee;
}
}
li {
overflow: hidden;
width: $r; height: $r;
transform-origin: 0 100%;
@for $i from 0 to $n {
&:nth-child(#{$i + 1}) {
$curr-angle: $i*$angle +
($i + .5)*$off-angle -
.5*$n*($angle + $off-angle);
// make each list item a rhombus rotated around its bottom left corner
// see explanation from minute 33:10 youtube.com/watch?v=ehjoh_MmE9A
transform: rotate($curr-angle)
skewY(-$skew-angle)
scaleX($scale-factor);
// add tip for the item n the middle, just a rotated square
@if $i == ($n - 1)/2 {
a:after {
position: absolute;
top: $exp; left: 50%;
margin: -$tip/2;
width: $tip; height: $tip;
transform: rotate(45deg);
box-shadow:
inset -1px -1px 1px #eee;
background: linear-gradient(-45deg,
#bbb, #c9c4bf 50%);
content: '';
}
}
}
}
a, &:before {
margin: 0 (-$r);
width: 2*$r; height: 2*$r;
border-radius: 50%;
}
&:before, &:after {
position: absolute;
border-radius: 50%;
// undo distorting transforms from menu item (parent li)
transform: scaleX(1/$scale-factor)
skewY($skew-angle);
content: '';
}
// actual background of the arched menu items
&:before {
box-shadow:
inset 0 0 1px 1px #fff,
inset 0 0 $exp #ebe7e2,
inset 0 0 1px ($exp - .0625em) #c9c4bf,
inset 0 0 0 $exp #dcdcdc;
}
// cover to prevent click action in between the star and menu items
&:after {
top: 100%; left: 0;
margin: -$cover-dim/2;
width: $cover-dim; height: $cover-dim;
border-radius: 50%;
}
}
a {
display: block;
// undo distorting transforms from menu item and rotate into right position
transform: scaleX(1/$scale-factor)
skewY($skew-angle)
rotate($angle/2);
line-height: $exp;
text-align: center;
text-decoration: none;
}
html {
overflow: hidden;
background: url(http://i.imgur.com/AeFfmwL.jpg);
}
input {
/* move offscreen */
-webkit-transform: translate(-100vw);
-ms-transform: translate(-100vw);
transform: translate(-100vw);
/* avoid paint */
visibility: hidden;
}
input:checked ~ ul {
-webkit-transform: scale(1);
-ms-transform: scale(1);
transform: scale(1);
opacity: .999;
/* ease out back from easings.net */
-webkit-transition: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
transition: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
label, ul, li {
position: absolute;
left: 50%;
bottom: 50%;
}
label, a {
color: #858596;
font: 700 1em/ 2em sans-serif;
text-align: center;
text-shadow: 0 1px 1px #6c6f7e;
cursor: pointer;
}
label {
z-index: 2;
margin: -1em;
width: 2em;
height: 2em;
border-radius: 50%;
box-shadow: 0 0 1px 1px white, 0 .125em .25em #876366, 0 .125em .5em #876366;
background: #d3d3d3;
background: -webkit-radial-gradient(#d4c7c5, #e5e1dd);
background: radial-gradient(#d4c7c5, #e5e1dd);
}
ul {
z-index: 1;
margin: -10em 0;
padding: 0;
list-style: none;
-webkit-transform-origin: 50% -13em;
-ms-transform-origin: 50% -13em;
transform-origin: 50% -13em;
-webkit-transform: scale(0.001);
-ms-transform: scale(0.001);
transform: scale(0.001);
/* for improved perf on transitioning transform
* https://twitter.com/paul_irish/status/608492121734193152
*/
will-change: transform;
opacity: .001;
-webkit-filter: drop-shadow(0 0.125em 0.25em #847c77);
filter: drop-shadow(0 0.125em 0.25em #847c77);
-webkit-transition: 0.5s cubic-bezier(0.6, -0.28, 0.735, 0.045);
transition: 0.5s cubic-bezier(0.6, -0.28, 0.735, 0.045);
}
ul:before, ul:after {
position: absolute;
margin: -3em -0.25em;
width: 0.5em;
height: 3em;
-webkit-transform-origin: 50% 100%;
-ms-transform-origin: 50% 100%;
transform-origin: 50% 100%;
background: #d3d3d3;
background: -webkit-linear-gradient(#ddd, #c9c4bf);
background: linear-gradient(#ddd, #c9c4bf);
content: '';
}
ul:before {
border-radius: 0.5em 0 0 0.5em;
-webkit-transform: rotate(-22.5deg) translate(-0.25em, -13em);
-ms-transform: rotate(-22.5deg) translate(-0.25em, -13em);
transform: rotate(-22.5deg) translate(-0.25em, -13em);
box-shadow: inset 1px 0 1px #eee;
}
ul:after {
border-radius: 0 0.5em 0.5em 0;
-webkit-transform: rotate(22.5deg) translate(0.25em, -13em);
-ms-transform: rotate(22.5deg) translate(0.25em, -13em);
transform: rotate(22.5deg) translate(0.25em, -13em);
box-shadow: inset -1px 0 1px #eee;
}
li {
overflow: hidden;
width: 16em;
height: 16em;
-webkit-transform-origin: 0 100%;
-ms-transform-origin: 0 100%;
transform-origin: 0 100%;
}
li:nth-child(1) {
-webkit-transform: rotate(-22.625deg) skewY(-75deg) scaleX(0.25882);
-ms-transform: rotate(-22.625deg) skewY(-75deg) scaleX(0.25882);
transform: rotate(-22.625deg) skewY(-75deg) scaleX(0.25882);
}
li:nth-child(2) {
-webkit-transform: rotate(-7.5deg) skewY(-75deg) scaleX(0.25882);
-ms-transform: rotate(-7.5deg) skewY(-75deg) scaleX(0.25882);
transform: rotate(-7.5deg) skewY(-75deg) scaleX(0.25882);
}
li:nth-child(2) a:after {
position: absolute;
top: 3em;
left: 50%;
margin: -0.375em;
width: 0.75em;
height: 0.75em;
-webkit-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
box-shadow: inset -1px -1px 1px #eee;
background: -webkit-linear-gradient(135deg, #bbb, #c9c4bf 50%);
background: linear-gradient(-45deg, #bbb, #c9c4bf 50%);
content: '';
}
li:nth-child(3) {
-webkit-transform: rotate(7.625deg) skewY(-75deg) scaleX(0.25882);
-ms-transform: rotate(7.625deg) skewY(-75deg) scaleX(0.25882);
transform: rotate(7.625deg) skewY(-75deg) scaleX(0.25882);
}
li a, li:before {
margin: 0 -16em;
width: 32em;
height: 32em;
border-radius: 50%;
}
li:before, li:after {
position: absolute;
border-radius: 50%;
-webkit-transform: scaleX(3.8637) skewY(75deg);
-ms-transform: scaleX(3.8637) skewY(75deg);
transform: scaleX(3.8637) skewY(75deg);
content: '';
}
li:before {
box-shadow: inset 0 0 1px 1px #fff, inset 0 0 3em #ebe7e2, inset 0 0 1px 2.9375em #c9c4bf, inset 0 0 0 3em #dcdcdc;
}
li:after {
top: 100%;
left: 0;
margin: -13em;
width: 26em;
height: 26em;
border-radius: 50%;
}
a {
display: block;
-webkit-transform: scaleX(3.8637) skewY(75deg) rotate(7.5deg);
-ms-transform: scaleX(3.8637) skewY(75deg) rotate(7.5deg);
transform: scaleX(3.8637) skewY(75deg) rotate(7.5deg);
line-height: 3em;
text-align: center;
text-decoration: none;
}<input type='checkbox' id='t'/>
<label for='t'>✰</label>
<ul>
<li><a href='#'>☀</a></li>
<li><a href='#'>☃</a></li>
<li><a href='#'>☁</a></li>
</ul>Original answer
My attempt at doing something of the kind with pure CSS:
demo
(click the star)
Works in Chrome, Firefox (a bit weirdish blur effect on hover), Opera (ends look smaller) & Safari (ends look smaller).
* { margin: 0; padding: 0; }
body {
overflow: hidden;
}
/* generic styles for button & circular menu */
.ctrl {
position: absolute;
top: 70%; left: 50%;
font: 1.5em/1.13 Verdana, sans-serif;
transition: .5s;
}
/* generic link styles */
a.ctrl, .ctrl a {
display: block;
opacity: .56;
background: #c9c9c9;
color: #7a8092;
text-align: center;
text-decoration: none;
text-shadow: 0 -1px dimgrey;
}
a.ctrl:hover, .ctrl a:hover, a.ctrl:focus, .ctrl a:focus { opacity: 1; }
a.ctrl:focus, .ctrl a:focus { outline: none; }
.button {
z-index: 2;
margin: -.625em;
width: 1.25em; height: 1.25em;
border-radius: 50%;
box-shadow: 0 0 3px 1px white;
}
/* circular menu */
.tip {
z-index: 1;
/**outline: dotted 1px white;/**/
margin: -5em;
width: 10em; height: 10em;
transform: scale(.001);
list-style: none;
opacity: 0;
}
/* the ends of the menu */
.tip:before, .tip:after {
position: absolute;
top: 34.3%;
width: .5em; height: 14%;
opacity: .56;
background: #c9c9c9;
content: '';
}
.tip:before {
left: 5.4%;
border-radius: .25em 0 0 .25em;
box-shadow: -1px 0 1px dimgrey, inset 1px 0 1px white, inset -1px 0 1px grey,
inset 0 1px 1px white, inset 0 -1px 1px white;
transform: rotate(-75deg);
}
.tip:after {
right: 5.4%;
border-radius: 0 .25em .25em 0;
box-shadow: 1px 0 1px dimgrey, inset -1px 0 1px white, inset 1px 0 1px grey,
inset 0 1px 1px white, inset 0 -1px 1px white;
transform: rotate(75deg);
}
/* make the menu appear on click */
.button:focus + .tip {
transform: scale(1);
opacity: 1;
}
/* slices of the circular menu */
.slice {
overflow: hidden;
position: absolute;
/**outline: dotted 1px yellow;/**/
width: 50%; height: 50%;
transform-origin: 100% 100%;
}
/*
* rotate each slice at the right angle = (A/2)° + (k - (n+1)/2)*A°
* where A is the angle of 1 slice (30° in this case)
* k is the number of the slice (in {1,2,3,4,5} here)
* and n is the number of slices (5 in this case)
* formula works for odd number of slices (n odd)
* for even number of slices (n even) the rotation angle is (k - n/2)*A°
*
* after rotating, skew on Y by 90°-A°; here A° = the angle for 1 slice = 30°
*/
.slice:first-child { transform: rotate(-45deg) skewY(60deg); }
.slice:nth-child(2) { transform: rotate(-15deg) skewY(60deg); }
.slice:nth-child(3) { transform: rotate(15deg) skewY(60deg); }
.slice:nth-child(4) { transform: rotate(45deg) skewY(60deg); }
.slice:last-child { transform: rotate(75deg) skewY(60deg); }
/* covers for the inner part of the links so there's no hover trigger between
star button & menu links; give them a red background to see them */
.slice:after {
position: absolute;
top: 32%; left: 32%;
width: 136%; height: 136%;
border-radius: 50%;
/* "unskew" = skew by minus the same angle by which parent was skewed */
transform: skewY(-60deg);
content: '';
}
/* menu links */
.slice a {
width: 200%; height: 200%;
border-radius: 50%;
box-shadow: 0 0 3px dimgrey, inset 0 0 4px white;
/* "unskew" & rotate by -A°/2 */
transform: skewY(-60deg) rotate(-15deg);
background: /* lateral separators */
linear-gradient(75deg,
transparent 50%, grey 50%, transparent 54%) no-repeat 36.5% 0,
linear-gradient(-75deg,
transparent 50%, grey 50%, transparent 54%) no-repeat 63.5% 0,
/* make sure inner part is transparent */
radial-gradient(rgba(127,127,127,0) 49%,
rgba(255,255,255,.7) 51%, #c9c9c9 52%);
background-size: 15% 15%, 15% 15%, cover;
line-height: 1.4;
}
/* arrow for middle link */
.slice:nth-child(3) a:after {
position: absolute;
top: 13%; left: 50%;
margin: -.25em;
width: .5em; height: .5em;
box-shadow: 2px 2px 2px white;
transform: rotate(45deg);
background: linear-gradient(-45deg, #c9c9c9 50%, transparent 50%);
content: '';
}<a class='button ctrl' href='#' tabindex='1'>★</a>
<ul class='tip ctrl'>
<li class='slice'><a href='#'>✦</a></li>
<li class='slice'><a href='#'>✿</a></li>
<li class='slice'><a href='#'>✵</a></li>
<li class='slice'><a href='#'>✪</a></li>
<li class='slice'><a href='#'>☀</a></li>
</ul>