[UI] Several improvements to the FloatingButton component.

- Added support for multiple element classes.

- Added `glow` property.

- Added support for absolute initial positioning.

- Added dynamic button size.

- Added FloatingButtons component to support groups of floating buttons.

platypush/backend/http/webapp/src/components/elements/FloatingButton.vue

@@ -1,7 +1,8 @@
 <template>
-  <div class="floating-btn" :class="className">
+  <div class="floating-btn" :class="classes">
     <button type="button"
             class="btn btn-primary"
+            :class="glow ? 'with-glow' : ''"
             :disabled="disabled"
             :title="title"
             @click="$emit('click', $event)">
@@ -14,7 +15,6 @@
 import Icon from "@/components/elements/Icon";
 
 export default {
-  name: "FloatingButton",
   components: {Icon},
   emits: ["click"],
 
@@ -35,11 +35,49 @@ export default {
     title: {
       type: String,
     },
+    left: {
+      type: Boolean,
+      default: false,
+    },
+    right: {
+      type: Boolean,
+      default: true,
+    },
+    top: {
+      type: Boolean,
+      default: false,
+    },
+    bottom: {
+      type: Boolean,
+      default: true,
+    },
+    glow: {
+      type: Boolean,
+      default: false,
+    },
   },
 
   computed: {
-    className() {
-      return this.class
+    classes() {
+      const classes = {}
+
+      if (this.left) {
+        classes.left = true
+      } else {
+        classes.right = true
+      }
+
+      if (this.top) {
+        classes.top = true
+      } else {
+        classes.bottom = true
+      }
+
+      if (this.class?.length) {
+        classes[this.class] = true
+      }
+
+      return classes
     }
   }
 }
@@ -48,15 +86,32 @@ export default {
 <style lang="scss" scoped>
 .floating-btn {
   position: absolute;
-  bottom: 0;
+
+  &.left {
+    left: 0;
+    margin-left: 1em;
+  }
+
+  &.right {
     right: 0;
-  margin: auto 1em 1em auto;
+    margin-right: 1em;
+  }
+
+  &.top {
+    top: 0;
+    margin-top: 1em;
+  }
+
+  &.bottom {
+    bottom: 0;
+    margin-bottom: 1em;
+  }
 
   button {
     background: $tile-bg !important;
     color: $tile-fg !important;
-    width: 4em;
-    height: 4em;
+    width: $floating-btn-size;
+    height: $floating-btn-size;
     border-radius: 2em;
     border: none !important;
     padding: 0;
@@ -72,6 +127,20 @@ export default {
       color: $disabled-fg !important;
       cursor: not-allowed;
     }
+
+    &.with-glow {
+      &:not(:disabled) {
+        @extend .glow;
+        background: $default-bg-3 !important;
+        color: $ok-fg !important;
+        box-shadow: 0 0 1px 1px $selected-fg !important;
+
+        &:hover {
+          box-shadow: 0 0 1px 1px $active-glow-bg-2 !important;
+          color: $play-btn-fg !important;
+        }
+      }
+    }
   }
 
   :deep(button) {

platypush/backend/http/webapp/src/components/elements/FloatingButtons.vue

@@ -0,0 +1,50 @@
+<template>
+  <div class="floating-btns" :class="{direction: direction}">
+    <slot />
+  </div>
+</template>
+
+<script>
+export default {
+  emits: ["click"],
+  props: {
+    direction: {
+      type: String,
+      default: "row",
+    },
+
+    size: {
+      type: String,
+      default: "4em",
+    },
+  },
+
+  computed: {
+    buttons() {
+      return this.$el.querySelectorAll(".floating-btn")
+    },
+  },
+
+  mounted() {
+    const buttons = Array.from(this.buttons)
+    let offset = 0
+    buttons.forEach((button, index) => {
+      const size = button.offsetWidth
+      const styleOffset = `calc(${offset}px + (${index} * 1em))`
+      if (this.direction === "row") {
+        if (!parseFloat(getComputedStyle(button).left))
+          button.style.left = styleOffset
+        else
+          button.style.right = styleOffset
+      } else {
+        if (!parseFloat(getComputedStyle(button).top))
+          button.style.top = styleOffset
+        else
+          button.style.bottom = styleOffset
+      }
+
+      offset += size
+    })
+  },
+}
+</script>