mdb-ui-kit/less/_checkboxes.less

// http://www.google.com/design/spec/components/selection-controls.html#selection-controls-checkbox

.checkbox label,
label.checkbox-inline {
  cursor: pointer;
  padding-left: 0; // Reset for Bootstrap rule
  color: @mdb-checkbox-label-color;
  .mdb-label-color-toggle-focus();
}

.checkbox,
label.checkbox-inline {
  // Hide native checkbox
  input[type=checkbox] {
    opacity: 0;
    position: absolute;
    margin: 0;
    z-index: -1;
    width: 0;
    height: 0;
    overflow: hidden;
    left: 0;
    pointer-events: none;
  }

  .checkbox-material {
    vertical-align: middle;
    position: relative;
    top: 3px;
    &:before { // FIXME: document why this is necessary (doesn't seem to be on chrome)
      display: block;
      position: absolute;
      top:-5px;
      left: 0;
      content: "";
      background-color: rgba(0, 0, 0, .84);
      height: @mdb-checkbox-size;
      width: @mdb-checkbox-size;
      border-radius: 100%;
      z-index: 1;
      opacity: 0;
      margin: 0;
      transform: scale3d(2.3, 2.3, 1);
    }

    .check {
      position: relative;
      display: inline-block;
      width: @mdb-checkbox-size;
      height: @mdb-checkbox-size;
      border: @mdb-checkbox-border-size solid @mdb-checkbox-border-color;
      border-radius: @border-radius-base;
      overflow: hidden;
      z-index: 1;
    }
    .check:before {
      position: absolute;
      content: "";
      transform: rotate(45deg);
      display: block;
      margin-top: -4px;
      margin-left: 6px;
      width: 0;
      height: 0;
      box-shadow:
        0 0 0 0,
        0 0 0 0,
        0 0 0 0,
        0 0 0 0,
        0 0 0 0,
        0 0 0 0,
        0 0 0 0 inset;
    }
  }

  input[type=checkbox] {

    &:focus + .checkbox-material .check:after {
      opacity: 0.2;
    }
 
    &:focus{
      
      &:checked{
        & + .checkbox-material:before {
          animation: rippleOn 500ms;
        }
        & + .checkbox-material .check:before {
          animation: checkbox-on @mdb-checkbox-animation-check forwards;
        }
        & + .checkbox-material .check:after {
          animation: rippleOn @mdb-checkbox-animation-ripple forwards; // Ripple effect on check
        }
      }
      
      &:not(:checked) {
        & + .checkbox-material:before {
          animation: rippleOff 500ms;
        }
        & + .checkbox-material .check:before {
          animation: checkbox-off @mdb-checkbox-animation-check forwards;
        }
        & + .checkbox-material .check:after {
          animation: rippleOff @mdb-checkbox-animation-ripple forwards; // Ripple effect on uncheck
        }
      }
      
    }
    
    
    &:checked {

      // FIXME: once working - combine further to reduce code
      & + .checkbox-material .check {
        color: @mdb-checkbox-checked-color;
        border-color: @mdb-checkbox-checked-color;
      }

      & + .checkbox-material .check:before {
        color: @mdb-checkbox-checked-color;
        box-shadow:
          0 0 0 10px,
          10px -10px 0 10px,
          32px 0 0 20px,
          0px 32px 0 20px,
          -5px 5px 0 10px,
          20px -12px 0 11px;
      }

      & + .checkbox-material .check:after {
        //background-color: @brand-success; // FIXME: seems like tho wrong color, test and make sure it can be removed
      }
    }
  }

  // Style for disabled inputs
  fieldset[disabled] &,
  fieldset[disabled] & input[type=checkbox],
  input[type=checkbox][disabled]:not(:checked) ~ .checkbox-material .check:before,
  input[type=checkbox][disabled]:not(:checked) ~ .checkbox-material .check,
  input[type=checkbox][disabled] + .circle {
    opacity: 0.5;
  }
  input[type=checkbox][disabled] + .checkbox-material .check:after {
    background-color: @mdb-text-color-primary;
    transform: rotate(-45deg);
  }
}

@keyframes checkbox-on {
  0% {
    box-shadow:
      0 0 0 10px,
      10px -10px 0 10px,
      32px 0 0 20px,
      0px 32px 0 20px,
      -5px 5px 0 10px,
      15px 2px 0 11px;
  }
  50% {
    box-shadow:
      0 0 0 10px,
      10px -10px 0 10px,
      32px 0 0 20px,
      0px 32px 0 20px,
      -5px 5px 0 10px,
      20px 2px 0 11px;
  }
  100% {
    box-shadow:
      0 0 0 10px,
      10px -10px 0 10px,
      32px 0 0 20px,
      0px 32px 0 20px,
      -5px 5px 0 10px,
      20px -12px 0 11px;
  }
}

@keyframes checkbox-off {
  0% {
    box-shadow:
      0 0 0 10px,
      10px -10px 0 10px,
      32px 0 0 20px,
      0px 32px 0 20px,
      -5px 5px 0 10px,
      20px -12px 0 11px,
      0 0 0 0 inset;
  }
  25% {
    box-shadow:
      0 0 0 10px,
      10px -10px 0 10px,
      32px 0 0 20px,
      0px 32px 0 20px,
      -5px 5px 0 10px,
      20px -12px 0 11px,
      0 0 0 0 inset;
  }
  50% {
    transform: rotate(45deg);
    margin-top: -4px;
    margin-left: 6px;
    width: 0;
    height: 0;
    box-shadow:
      0 0 0 10px,
      10px -10px 0 10px,
      32px 0 0 20px,
      0px 32px 0 20px,
      -5px 5px 0 10px,
      15px 2px 0 11px,
      0 0 0 0 inset;
  }
  51% {
    transform: rotate(0deg);
    margin-top: -2px;
    margin-left: -2px;
    width: 20px;
    height: 20px;
    box-shadow:
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0px 0 0 10px inset;
  }
  100% {
    transform: rotate(0deg);
    margin-top: -2px;
    margin-left: -2px;
    width: 20px;
    height: 20px;
    box-shadow:
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0 0 0 0,
      0px 0 0 0 inset;
  }
}

@keyframes rippleOn {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 0.2;
  }
  100% {
    opacity: 0;
  }
}

@keyframes rippleOff {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 0.2;
  }
  100% {
    opacity: 0;
  }
}