How to create a radial menu in CSS?

Question 1

How to create a radial menu in CSS?

css tooltip css-shapes

ssb · Oct 30, 2012 · Viewed 80.8k times · Source

Answer

Answer

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:

Chrome screenshot

Firefox 38:

Firefox screenshot

IE 11:

IE screenshot

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>

Question 2

How do I create a menu which looks like so:

Tooltip Image

Link to PSD

I don't want to use the PSD images. I would prefer using icons from some package like FontAwesome and have the backgrounds/css generated in CSS.

A version of the menu that is using the PSD to to generate images of the tooltip and then using it can be found here.

How to create a radial menu in CSS?

Answer

2015 demo

Screenshots

Code

Original answer

demo

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