material-design-lite/src/icon-toggle/_icon-toggle.scss

/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

@import "../variables";

.mdl-icon-toggle {
  position: relative;

  z-index: 1;

  vertical-align: middle;

  display: inline-block;
  height: $icon-toggle-size;
  margin: 0;
  padding: 0;
}

.mdl-icon-toggle__input {
  line-height: $icon-toggle-size;

  .mdl-icon-toggle.is-upgraded & {
    // Hide input element, while still making it respond to focus.
    position: absolute;
    width: 0;
    height: 0;
    margin: 0;
    padding: 0;
    opacity: 0;
    -ms-appearance: none;
    -moz-appearance: none;
    -webkit-appearance: none;
    appearance: none;
    border: none;
  }
}

.mdl-icon-toggle__label {
  display: inline-block;
  position: relative;
  cursor: pointer;
  height: $icon-toggle-size;
  width: $icon-toggle-size;
  min-width: $icon-toggle-size;
  color: $icon-toggle-color;
  border-radius: 50%;
  padding: 0;
  margin-left: 0;
  margin-right: 0;
  text-align: center;
  background-color: transparent;
  will-change: background-color;
  transition: background-color 0.2s $animation-curve-default,
  color 0.2s $animation-curve-default;

  &.material-icons {
    line-height: $icon-toggle-size;
    font-size: $icon-toggle-font-size;
  }

  .mdl-icon-toggle.is-checked & {
    color: $icon-toggle-checked-color;
  }

  .mdl-icon-toggle.is-disabled & {
    color: $icon-toggle-disabled-color;
    cursor: auto;
    transition: none;
  }

  .mdl-icon-toggle.is-focused & {
    background-color: $icon-toggle-focus-color;
  }

  .mdl-icon-toggle.is-focused.is-checked & {
    background-color: $icon-toggle-checked-focus-color;
  }
}


.mdl-icon-toggle__ripple-container {
  position: absolute;
  z-index: 2;
  top: -(($icon-toggle-ripple-size - $icon-toggle-size) / 2);
  left: -(($icon-toggle-ripple-size - $icon-toggle-size) / 2);

  box-sizing: border-box;
  width: $icon-toggle-ripple-size;
  height: $icon-toggle-ripple-size;
  border-radius: 50%;

  cursor: pointer;

  overflow: hidden;
  -webkit-mask-image: -webkit-radial-gradient(circle, white, black);

  & .mdl-ripple {
    background: $icon-toggle-color;
  }

  .mdl-icon-toggle.is-disabled & {
    cursor: auto;
  }

  .mdl-icon-toggle.is-disabled & .mdl-ripple {
    background: transparent;
  }
}