viewer: finalized the thumbnails view layouts. implemented thumbnails lazy-loading

4 files changed, 46 insertions, 11 deletions

diff --git a/viewer/src/views/GalleryDirectory.vue b/viewer/src/views/GalleryDirectory.vue
index eb98595..1df0c4d 100644
--- a/viewer/src/views/GalleryDirectory.vue
+++ b/viewer/src/views/GalleryDirectory.vue
@@ -18,13 +18,14 @@
 -->
 
 <template>
-  <div>
-    <div class="flex">
-      <div v-for="(item) in directory.properties.items" :key="item.path">
-        <router-link :to="item.path">
-          <gallery-thumbnail :item="item" />
-        </router-link>
-      </div>
+  <div class="thumbnail-tiles">
+    <div v-for="(item) in directory.properties.items" :key="item.path">
+      <router-link :to="item.path">
+        <gallery-thumbnail :item="item" />
+      </router-link>
+    </div>
+    <div>
+      <!-- Empty item for better flex layout -->
     </div>
   </div>
 </template>
diff --git a/viewer/src/views/GallerySearch.vue b/viewer/src/views/GallerySearch.vue
index 7e61f89..870d3e2 100644
--- a/viewer/src/views/GallerySearch.vue
+++ b/viewer/src/views/GallerySearch.vue
@@ -18,13 +18,16 @@
 -->
 
 <template>
-  <div class="flex">
+  <div class="thumbnail-tiles">
     <div v-for="(item) in items" :key="item.path">
       <router-link :to="item.path" @click.native="$uiStore.setModeNavigation()">
         <gallery-thumbnail :item="item" />
       </router-link>
     </div>
     <div v-if="items.length===0">{{$t('search.no-results')}}</div>
+    <div>
+      <!-- Empty item for better flex layout -->
+    </div>
   </div>
 </template>
 
diff --git a/viewer/src/views/GalleryThumbnail.vue b/viewer/src/views/GalleryThumbnail.vue
index 4d8f604..7ceea4f 100644
--- a/viewer/src/views/GalleryThumbnail.vue
+++ b/viewer/src/views/GalleryThumbnail.vue
@@ -18,8 +18,15 @@
 -->
 
 <template>
-  <div>
-    <img v-if="item.thumbnail" class="thumbnail" :src="pictureSrc" :title="item.path" />
+  <div class="forcedsize" :class="{preload: loading}">
+    <v-lazy-image
+      v-if="item.thumbnail"
+      class="thumbnail"
+      :src="pictureSrc"
+      :title="item.path"
+      @intersect="loading=true"
+      @load="loading=false"
+    />
     <div v-else class="flex-column flex-center">
       <fa-icon icon="folder" class="fa-4x" />
       {{item.path}}
@@ -34,6 +41,8 @@ import { Component, Vue, Prop } from "vue-property-decorator";
 export default class GalleryThumbnail extends Vue {
   @Prop({ required: true }) readonly item!: Gallery.Item;
 
+  loading: boolean = false;
+
   get pictureSrc() {
     return `${process.env.VUE_APP_DATA_URL}${this.item.thumbnail}`;
   }
@@ -41,8 +50,29 @@ export default class GalleryThumbnail extends Vue {
 </script>
 
 <style lang="scss">
+@import "@/assets/scss/theme.scss";
+
 .thumbnail {
   max-width: 250px;
   max-height: 250px;
 }
+.preload {
+  background: linear-gradient(to right, rgba(0, 0, 0, 0) 8%, $loader-color 18%, rgba(0, 0, 0, 0) 33%);
+  background-size: 200% 50px;
+  animation: preloadAnimation 2s infinite linear;
+}
+@keyframes preloadAnimation {
+  from {
+    background-position: -200px 0;
+  }
+  to {
+    background-position: 200px 0;
+  }
+}
+// Temporary size until we get the true thumbnail size
+.forcedsize {
+  width: 250px;
+  height: 250px;
+  text-align: center;
+}
 </style>
diff --git a/viewer/src/views/MainLayout.vue b/viewer/src/views/MainLayout.vue
index 5308205..de6f8af 100644
--- a/viewer/src/views/MainLayout.vue
+++ b/viewer/src/views/MainLayout.vue
@@ -21,7 +21,7 @@
   <div :class="{fullscreen: $uiStore.fullscreen}">
     <panel-top class="layout layout-top" />
     <panel-left class="layout layout-left" />
-    <router-view class="layout layout-content" />
+    <router-view class="layout layout-content scrollbar" />
     <ld-button-fullscreen />
     <b-loading :active="isLoading" is-full-page />
   </div>
@@ -93,6 +93,7 @@ html {
     top: var(--layout-top);
     left: var(--layout-left);
     z-index: 3;
+    overflow-x: hidden;
   }
 }
 .fullscreen {