superset-frontend/packages/superset-frontend/src/dashboard/stylesheets/hover-menu.less

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
.hover-menu {
  opacity: 0;
  position: absolute;
  z-index: @z-index-above-dashboard-charts;
  font-size: @font-size-m;
}

.hover-menu--left {
  width: 24px;
  top: 50%;
  transform: translate(0, -50%);
  left: -28px;
  padding: 8px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hover-menu--left > :nth-child(n):not(:only-child):not(:last-child) {
  margin-bottom: 12px;
}

.hover-menu--top {
  height: 24px;
  top: -24px;
  left: 50%;
  transform: translate(-50%);
  padding: 0 8px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}

/* Special cases */

/* A row within a column has inset hover menu */
.dragdroppable-column .dragdroppable-row .hover-menu--left {
  left: -12px;
  background: @lightest;
  border: 1px solid @gray-light;
}

/* A column within a column or tabs has inset hover menu */
.dragdroppable-column .dragdroppable-column .hover-menu--top,
.dashboard-component-tabs .dragdroppable-column .hover-menu--top {
  top: -12px;
  background: @lightest;
  border: 1px solid @gray-light;
}

/* move Tabs hover menu to top near actual Tabs */
.dashboard-component-tabs > .hover-menu--left {
  top: 0;
  transform: unset;
  background: transparent;
}

/* push Chart actions to upper right */
.dragdroppable-column .dashboard-component-chart-holder > .hover-menu--top {
  right: 8px;
  top: 8px;
  background: transparent;
  border: none;
  transform: unset;
  left: unset;
}

.hover-menu--top > :nth-child(n):not(:only-child):not(:last-child) {
  margin-right: 12px;
}

div:hover > .hover-menu,
.hover-menu:hover {
  opacity: 1;
}