daocha_web/public/assets/esri/themes/base/widgets/_BasemapGallery.scss

@mixin basemapGallery() {
  $basemap-thumbnail-size: $button-height--double !default;

  .esri-basemap-gallery {
    color: $font-color;
    background-color: $background-color;
    overflow-y: auto;
    position: relative;
    width: auto;
  }

  .esri-basemap-gallery__item-container {
    display: flex;
    flex-flow: column nowrap;
    position: relative;
    transition: opacity 250ms ease-in-out;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .esri-basemap-gallery--source-refreshing .esri-basemap-gallery__item-container,
  .esri-basemap-gallery.esri-disabled .esri-basemap-gallery__item {
    opacity: $opacity--disabled;
    pointer-events: none;
    animation: none;
  }

  .esri-basemap-gallery__empty-message {
    padding: $cap-spacing $side-spacing;
    animation: esri-fade-in 500ms ease-in-out;
  }

  .esri-basemap-gallery__item {
    position: relative;
    display: flex;
    align-items: center;
    padding: $cap-spacing--half $side-spacing--half;
    cursor: pointer;
    border-left: 3px solid transparent;
    border-right: 3px solid transparent;
    animation: esri-fade-in 500ms ease-in-out;
    transition: background-color 250ms ease-in-out;
  }

  .esri-basemap-gallery__item:first-child {
    margin-top: $cap-spacing--half;
  }

  .esri-basemap-gallery__loader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    width: 100%;
    animation: esri-fade-in 500ms ease-in-out;
  }

  @include loopingProgressBar(".esri-basemap-gallery__loader");

  .esri-basemap-gallery__item--error {
    cursor: auto;
    opacity: $opacity--disabled;
  }

  .esri-basemap-gallery__item-thumbnail {
    height: $basemap-thumbnail-size;
    width: auto;
    box-shadow: 0 0 0 1px $border-color;
  }

  @supports (object-fit: cover) {
    .esri-basemap-gallery__item-thumbnail {
      height: $basemap-thumbnail-size;
      width: $basemap-thumbnail-size;
      object-fit: cover;
    }
  }

  .esri-basemap-gallery__item-title {
    font-size: $font-size--small;
    word-break: break-word;
    color: $interactive-font-color;
    padding: 0 $side-spacing--half;
  }

  .esri-basemap-gallery__item--selected,
  .esri-basemap-gallery__item.esri-basemap-gallery__item--selected:hover,
  .esri-basemap-gallery__item.esri-basemap-gallery__item--selected:focus {
    cursor: auto;
    border-left-color: $border-color--active;
    background-color: $background-color--active;

    .esri-basemap-gallery__item-title {
      color: $font-color;
    }
  }

  .esri-basemap-gallery__item:hover,
  .esri-basemap-gallery__item:focus {
    outline: none;
    background-color: $background-color--hover;
    border-left-color: $background-color--hover;

    .esri-basemap-gallery__item-title {
      color: $interactive-font-color;
    }
  }

  .esri-basemap-gallery__item.esri-basemap-gallery__item--error:hover,
  .esri-basemap-gallery__item.esri-basemap-gallery__item--error:focus {
    background-color: $background-color;
    border-color: transparent;
  }

  .esri-view .esri-basemap-gallery {
    min-width: $panel-width--three-quarters;
    max-width: $panel-width;
  }

  .esri-view-width-greater-than-large .esri-ui-corner {
    .esri-basemap-gallery.esri-component {
      width: $panel-width--plus-half;
      max-width: initial;
      .esri-basemap-gallery__item-container {
        flex-flow: row wrap;
        align-items: baseline;
      }
      .esri-basemap-gallery__item {
        border: 1px solid rgba(0, 0, 0, 0);
        flex-flow: column wrap;
        width: 29.333%;
        margin: $cap-spacing--quarter 2%;
        padding: $cap-spacing 0;
        text-align: center;
      }
      .esri-basemap-gallery__item-thumbnail {
        max-width: 100%;
        margin-bottom: $cap-spacing--half;
      }
      .esri-basemap-gallery__item-title {
        margin-top: $cap-spacing--half;

        width: 100%; // ie11 needs this for title to wrap
      }
      .esri-basemap-gallery__item--selected,
      .esri-basemap-gallery__item.esri-basemap-gallery__item--selected:hover,
      .esri-basemap-gallery__item.esri-basemap-gallery__item--selected:focus {
        border-color: $border-color--active;
      }
    }
  }

  [dir="rtl"] {
    .esri-basemap-gallery__item--selected,
    .esri-basemap-gallery__item.esri-basemap-gallery__item--selected:hover,
    .esri-basemap-gallery__item.esri-basemap-gallery__item--selected:focus {
      border-left-color: transparent;
      border-right-color: $border-color--active;
    }
  }
}

@if $include_BasemapGallery == true {
  @include basemapGallery();
}