material-gauge.css

/*
 * #### Gauge Component
 *
 * The standard markup for the component is:
 *
 *      <div class="gauge">
 *          <div class="gauge__container">
 *              <div class="gauge__marker"></div>
 *              <div class="gauge__background"></div>
 *              <div class="gauge__center"></div>
 *              <div class="gauge__data"></div>
 *              <div class="gauge__needle"></div>
 *          </div>
 *          <div class="gauge__labels">
 *              <span class="gauge__label--low">No</span>
 *              <span class="gauge__label--spacer"></span>
 *              <span class="gauge__label--high">Yes</span>
 *          </div>
 *      </div>
 */

/*
 * First define all of the relevant rules that aren't dependent
 * on the size of the gauge. We want to collect the size-depenent
 * rules in one place to make it easier to adjust the size.
 */

.gauge {
    position: relative;
}

.gauge__container {
	margin: 0;
	padding: 0;
	position: absolute;
	left: 50%;
	overflow: hidden;
	text-align: center;
	-webkit-transform: translateX(-50%);
	   -moz-transform: translateX(-50%);
	    -ms-transform: translateX(-50%);
	     -o-transform: translateX(-50%);
	        transform: translateX(-50%);
}

.gauge__background {
	z-index: 0;
	position: absolute;
	background-color: #C5CAE9;
	top: 0;
	border-radius: 300px 300px 0 0;
}

.gauge__data {
	z-index: 1;
	position: absolute;
	background-color: #3F51B5;
	margin-left: auto;
	margin-right: auto;
	border-radius: 300px 300px 0 0;
    -webkit-transform-origin: center bottom;
       -moz-transform-origin: center bottom;
        -ms-transform-origin: center bottom;
         -o-transform-origin: center bottom;
            transform-origin: center bottom;
}

.gauge__center {
	z-index: 2;
	position: absolute;
	background-color: #fff;
	margin-right: auto;
	border-radius: 300px 300px 0 0;
}

.gauge__marker {
    z-index: 3;
    background-color: #fff;
    position: absolute;
    width: 1px;
}

.gauge__needle {
    z-index: 4;
    background-color: #E91E63;
    height: 3px;
    position: absolute;
    -webkit-transform-origin: left center;
       -moz-transform-origin: left center;
        -ms-transform-origin: left center;
         -o-transform-origin: left center;
            transform-origin: left center;
}

.gauge__labels {
    display: table;
    margin: 0 auto;
    position: relative;
}

.gauge__label--low {
    display: table-cell;
    text-align: center;
}

.gauge__label--spacer {
    display: table-cell;
}

.gauge__label--high {
    display: table-cell;
    text-align: center;
}

/*
 * Now define the rules that depend on the size of
 * the gauge. We start with sizing for a small mobile
 * device.
 */

.gauge { height: calc(120px + 3em); }
.gauge__container { width: 240px; height: 120px; }
.gauge__marker { height: 120px; left: 119.5px; }
.gauge__background { width: 240px; height: 120px; }
.gauge__center { width: 144px; height: 72px; top: 48px; margin-left: 48px; }
.gauge__data { width: 240px; height: 120px; }
.gauge__needle { left: 120px; top: 117px; width: 120px; }
.gauge__labels { top: 120px; width: 240px; }
.gauge__label--low { width: 48px; }
.gauge__label--spacer { width: 144px; }
.gauge__label--high { width: 48px; }

/*
 * Increase the gauge size slightly on larger viewports.
 */

 @media only screen and (min-width: 400px) {
    .gauge { height: calc(150px + 3em); }
    .gauge__container { width: 300px; height: 150px; }
    .gauge__marker { height: 150px; left: 149.5px; }
    .gauge__background { width: 300px; height: 150px; }
    .gauge__center { width: 180px; height: 90px; top: 60px; margin-left: 60px; }
    .gauge__data { width: 300px; height: 150px; }
    .gauge__needle { left: 150px; top: 147px; width: 150px; }
    .gauge__labels { top: 150px; width: 300px; }
    .gauge__label--low { width: 60px; }
    .gauge__label--spacer { width: 180px; }
    .gauge__label--high { width: 60px; }
}

/*
 * As an option, the `gauge--liveupdate` class can be added
 * to the main gauge element. When this class is present,
 * we add a transition that animates any changes to the gauge
 * value. Currently, the app does not use this option because
 * all the inputs that can change gauge values are present
 * on tab panels that are different from the gauge itself.
 * Therefore, users won't be able to see any gauge changes
 * when they make input changes. The code is available, though,
 * should this change.
 */

.gauge--liveupdate .gauge__data,
.gauge--liveupdate .gauge__needle {
    -webkit-transition: all 1s ease-in-out;
       -moz-transition: all 1s ease-in-out;
        -ms-transition: all 1s ease-in-out;
         -o-transition: all 1s ease-in-out;
            transition: all 1s ease-in-out;
}

/*
 * For a given gauge value, x, ranging from 0.0 to 1.0, set
 * the `transform: rotate()` property according to the
 * following equation: `-0.5 + 0.5x turns` The default
 * properties below represent an x value of 0.
 */

.gauge__data {
    -webkit-transform: rotate(-.50turn);
       -moz-transform: rotate(-.50turn);
        -ms-transform: rotate(-.50turn);
         -o-transform: rotate(-.50turn);
            transform: rotate(-.50turn);
}
.gauge__needle {
    -webkit-transform: rotate(-.50turn);
       -moz-transform: rotate(-.50turn);
        -ms-transform: rotate(-.50turn);
         -o-transform: rotate(-.50turn);
            transform: rotate(-.50turn);
}