Add shadow behind navigation when Dashboard is scrolled

Signed-off-by: Jan C. Borchardt <hey@jancborchardt.net>

apps/dashboard/css/dashboard.scss

@@ -1,11 +1,39 @@
-// Show Dashboard background image beneath header
-#body-user #header {
-	background-size: cover !important;
-	background-position: center 50% !important;
-	background-repeat: no-repeat !important;
-	background-attachment: fixed !important;
+#header {
+	background: transparent !important;
+	--color-header: rgba(24, 24, 24, 1);
+
+	#body-user.dashboard--dark & {
+		--color-header: rgba(255, 255, 255, 1);
+	}
+
+	// Show gradient below navigation for visibility of icons when scrolled
+	&:before {
+		content: ' ';
+		display: block;
+		position: absolute;
+		background-image: linear-gradient(180deg, var(--color-header) 0%, transparent 100%);
+		width: 100%;
+		height: 70px;
+		top: 0;
+		margin-top: -70px;
+		transition: margin-top var(--animation-slow);
+
+		#body-user.dashboard--scrolled & {
+			margin-top: 0;
+		}
+	}
+
+	// Use flat color instead of gradient for high contrast theme
+	#body-user.theme--highcontrast & {
+		background-color: var(--color-header) !important;
+
+		&:before {
+			display: none;
+		}
+	}
 }
 
+// Move content up so it scrolls below navigation
 #content {
 	padding-top: 0 !important;
 }

apps/dashboard/src/App.vue

@@ -225,13 +225,6 @@ export default {
 				}
 			}
 		},
-		backgroundImage: {
-			immediate: true,
-			handler() {
-				const header = document.getElementById('header')
-				header.style.backgroundImage = `url(${this.backgroundImage})`
-			},
-		},
 	},
 	mounted() {
 		this.updateGlobalStyles()
@@ -366,7 +359,7 @@ export default {
 			this.saveStatuses()
 		},
 		handleScroll() {
-			if (window.scrollY > 50) {
+			if (window.scrollY > 70) {
 				document.body.classList.add('dashboard--scrolled')
 			} else {
 				document.body.classList.remove('dashboard--scrolled')
@@ -376,10 +369,6 @@ export default {
 }
 </script>
 
-<style lang="scss">
-
-</style>
-
 <style lang="scss" scoped>
 	#app-dashboard {
 		width: 100%;