SAP · Okiana · Jul 25, 2023 · Jul 11, 2023 · Jul 12, 2023 · Jul 18, 2023
diff --git a/packages/main/src/Panel.hbs b/packages/main/src/Panel.hbs
@@ -8,7 +8,7 @@
 	{{#if hasHeaderOrHeaderText}}
 		{{! header: either header or h1 with header text}}
 		<div
-			class="ui5-panel-heading-wrapper"
+			class="ui5-panel-heading-wrapper{{classes.stickyHeaderClass}}"
 			role="{{headingWrapperRole}}"
 			aria-level="{{headingWrapperAriaLevel}}"
 		>

diff --git a/packages/main/src/Panel.ts b/packages/main/src/Panel.ts
@@ -196,6 +196,20 @@ class Panel extends UI5Element {
 	@property()
 	accessibleName!: string;
 
+	/**
+	 * Indicates whether the Panel header is sticky or not.
+	 * If stickyHeader is set to true, then whenever you scroll the content or
+	 * the application, the header of the panel will be always visible and
+	 * a solid color will be used for its design.
+	 * @type {boolean}
+	 * @name sap.ui.webc.main.Panel.prototype.stickyHeader
+	 * @defaultvalue false
+	 * @public
+	 * @since 1.16.0-rc.1
+	 */
+	 @property({ type: Boolean })
+	 stickyHeader!: boolean;
+
 	/**
 	 * When set to <code>true</code>, the <code>accessibleName</code> property will be
 	 * applied not only on the panel root itself, but on its toggle button too.
@@ -348,6 +362,9 @@ class Panel extends UI5Element {
 			headerBtn: {
 				"ui5-panel-header-button-animated": !this.shouldNotAnimate(),
 			},
+			stickyHeaderClass: {
+				"ui5-panel-heading-wrapper-sticky": this.stickyHeader,
+			},
 		};
 	}
 

diff --git a/packages/main/src/themes/Panel.css b/packages/main/src/themes/Panel.css
@@ -68,6 +68,14 @@
 	width: 100%;
 }
 
+.ui5-panel-heading-wrapper.ui5-panel-heading-wrapper-sticky {
+    position: sticky;
+    top: 0;
+	background-color: var(--_ui5_panel_header_background_color);
+	z-index: 100; /* The z-index of the table header is 99 therefore to have table in the panel and panel header to be on top we need 100 */
+	border-radius: var(--_ui5_panel_border_radius);
+}
+
 .ui5-panel-header-title {
 	width: calc(100% - var(--_ui5_panel_button_root_width));
 	overflow: hidden;
@@ -86,6 +94,7 @@
 	outline: none;
 	border-bottom-left-radius: var(--_ui5_panel_border_radius);
 	border-bottom-right-radius: var(--_ui5_panel_border_radius);
+	overflow: auto;
 }
 
 .ui5-panel-header-button-root {
@@ -136,4 +145,10 @@
 .ui5-panel-header-icon-wrapper,
 [ui5-button].ui5-panel-header-button-with-icon [ui5-icon] {
 	pointer-events: none;
+}
+
+.ui5-panel-root {
+	height: 100%;
+    display: flex;
+    flex-direction: column;
 }
diff --git a/packages/main/src/themes/base/Panel-parameters.css b/packages/main/src/themes/base/Panel-parameters.css
@@ -10,11 +10,12 @@
 	--_ui5_panel_header_padding_right: 0.5rem;
 	--_ui5_panel_header_button_wrapper_padding: .25rem;
 	--_ui5_panel_focus_offset: 1px;
-	--_ui5_panel_content_padding: 0.625rem 1rem 1.375rem 1rem
+	--_ui5_panel_content_padding: 0.625rem 1rem 1.375rem 1rem;
+	--_ui5_panel_header_background_color: var(--sapBackgroundColor);
 }
 
 [data-ui5-compact-size],
 .ui5-content-density-compact,
 .sapUiSizeCompact {
 	--_ui5_panel_header_button_wrapper_padding: .5625rem .375rem;
-}
+}
diff --git a/packages/main/src/themes/sap_horizon/Panel-parameters.css b/packages/main/src/themes/sap_horizon/Panel-parameters.css
@@ -10,4 +10,5 @@
 	--_ui5_panel_icon_color: var(--sapButton_Lite_TextColor);
 	--_ui5_panel_focus_offset: -1px;
 	--_ui5_panel_content_padding: 0.625rem 1rem;
+	--_ui5_panel_header_background_color: var(--sapGroup_TitleBackground);
 }
diff --git a/packages/main/src/themes/sap_horizon_dark/Panel-parameters.css b/packages/main/src/themes/sap_horizon_dark/Panel-parameters.css
@@ -10,4 +10,5 @@
 	--_ui5_panel_icon_color: var(--sapButton_Lite_TextColor);
 	--_ui5_panel_focus_offset: -1px;
 	--_ui5_panel_content_padding: 0.625rem 1rem;
+	--_ui5_panel_header_background_color: var(--sapGroup_TitleBackground);
 }
diff --git a/packages/main/src/themes/sap_horizon_hcb/Panel-parameters.css b/packages/main/src/themes/sap_horizon_hcb/Panel-parameters.css
@@ -6,4 +6,5 @@
 	--_ui5_panel_outline_offset: -0.125rem;
 	--_ui5_panel_icon_color: var(--sapButton_Lite_TextColor);
 	--_ui5_panel_content_padding: 0.625rem 1rem;
+	--_ui5_panel_header_background_color: var(--sapGroup_TitleBackground);
 }
diff --git a/packages/main/src/themes/sap_horizon_hcw/Panel-parameters.css b/packages/main/src/themes/sap_horizon_hcw/Panel-parameters.css
@@ -7,4 +7,5 @@
 	--_ui5_panel_outline_offset: -0.125rem;
 	--_ui5_panel_icon_color: var(--sapButton_Lite_TextColor);
 	--_ui5_panel_content_padding: 0.625rem 1rem;
+	--_ui5_panel_header_background_color: var(--sapGroup_TitleBackground);
 }
diff --git a/packages/main/test/pages/Panel.html b/packages/main/test/pages/Panel.html
@@ -154,6 +154,28 @@
 
 	<br>
 
+	<ui5-panel id="panel-stickyHeader" sticky-header header-text="Panel with sticky header">
+		<!-- Content -->
+		<ui5-title>Lorem ipsum!</ui5-title>
+
+		<ui5-label id="contentSticky" wrapping-type="Normal">
+			<span>
+				Lorem ipsum dolor sit amet, tamquam invidunt cu sed, unum regione mel ea, quo ea alia novum. Ne qui illud zril
+				nostrum, vel ea sint dicant postea. Vel ne facete tritani, neglegentur concludaturque sed te. His animal dolorum ut.
+				Aeterno appareat ei mei, cu sed elit scripserit, an quodsi oportere accusamus quo. Pri ea probo corpora rationibus,
+				soluta incorrupte ex his.
+				Mei ei brute cetero, id duo magna aeque torquatos. Quodsi erroribus mediocritatem his ut, ad pri legere iracundia
+				democritum. Menandri intellegam in mea, ex vero movet qualisque sed. Maiorum verterem perfecto nec ea, est velit
+				elaboraret consequuntur eu, eam ad reque postea admodum. Ne inimicus convenire pri, doctus vidisse te ius.
+				Percipitur contentiones in vis, cu vim propriae phaedrum. Has ad magna errem honestatis, duo vero graeco epicurei
+				no, populo semper sit ne. Vulputate dissentiunt interpretaris ea vis, nec civibus moderatius at. Cu vim stet
+				dissentias, no vidit saperet indoctum nec, et pro magna prima nobis. Vis consul feugiat qualisque in, regione
+				persecuti cotidieque id eos, id ius omnesque vituperata.
+			</span>
+		</ui5-label>
+	</ui5-panel>
+
+	<br>
 	<ui5-panel id="panel1" collapsed header-text="Click to expand!" header-level="H3" accessible-role="Form">
 
 		<!-- Content -->

diff --git a/packages/main/test/pages/styles/Panel.css b/packages/main/test/pages/styles/Panel.css
@@ -7,3 +7,7 @@
 .panel1auto {
     background-color: var(--sapBackgroundColor);
 }
+
+#panel-stickyHeader::part(content) {
+    max-height: 70px;
+}
diff --git a/packages/main/test/specs/Panel.spec.js b/packages/main/test/specs/Panel.spec.js
@@ -124,6 +124,44 @@ describe("Panel general interaction", () => {
 		assert.notOk(await panelWithoutAnimationIcon.hasClass("ui5-panel-header-button-animated"), "Animation is turn off");
 	});
 
+	it("Test that the header is sticky when inner content scrollable", async () => {
+		const panel = await browser.$("#panel-stickyHeader");
+		const content = await panel.shadow$(".ui5-panel-content");
+		const title = await panel.shadow$(".ui5-panel-header-title");
+		const sExpected = "Panel with sticky header";
+		const panelHeader = panel.shadow$(".ui5-panel-heading-wrapper");
+
+		assert.strictEqual(await title.getText(), sExpected, "Initially the text is the expected one");
+		assert.strictEqual((await content.getCSSProperty('overflow')).value, "auto", "Check if the overflow property is set to 'auto'");
+
+		const initialScrollPosition = await browser.execute("return document.querySelector('#panel-stickyHeader').shadowRoot.querySelector('.ui5-panel-content').scrollTop");
+		await browser.execute("document.querySelector('#panel-stickyHeader').shadowRoot.querySelector('.ui5-panel-content').scrollBy(0, 200)");
+		const finalScrollPosition = await browser.execute("return document.querySelector('#panel-stickyHeader').shadowRoot.querySelector('.ui5-panel-content').scrollTop");
+		assert.ok(initialScrollPosition < finalScrollPosition, "Initial scroll position of the inner div should be less than the final");
+		assert.strictEqual(await panelHeader.isDisplayedInViewport(), true, "Assert that the header is still visible after scroll - it's sticky");
+	});
+
+	it("Test that the header is sticky", async () => {
+		const panel = await browser.$("#panel-stickyHeader");
+		const title = await panel.shadow$(".ui5-panel-header-title");
+		const sExpected = "Panel with sticky header";
+
+		const panelHeader = panel.shadow$(".ui5-panel-heading-wrapper");
+		const isStickyCssPosition = await browser.execute("return window.getComputedStyle(document.querySelector('#panel-stickyHeader').shadowRoot.querySelector('.ui5-panel-heading-wrapper')).position");
+
+		await browser.setWindowSize(1000, 1200);
+
+		assert.strictEqual(await title.getText(), sExpected, "Initially the text is the expected one");
+		assert.ok(await panelHeader.hasClass("ui5-panel-heading-wrapper-sticky"), "Assert that sticky css class is available");
+		assert.strictEqual(isStickyCssPosition, "sticky", "Assert that the header has a sticky position");
+
+        let isPanelHeaderDisplayed = await panelHeader.isDisplayedInViewport();
+		assert.strictEqual(isPanelHeaderDisplayed, true, "Initially the panel header should be visible");
+        await browser.execute("window.scrollBy(0, 500)");
+        isPanelHeaderDisplayed = await panelHeader.isDisplayedInViewport();
+		assert.strictEqual(isPanelHeaderDisplayed, true, "Assert that the header is still visible after scroll - it's sticky");
+	});
+
 	describe("Accessibility", async () => {
 
 		it("tests whether aria attributes are set correctly with native header", async () => {

diff --git a/packages/playground/_stories/main/Panel/Panel.stories.ts b/packages/playground/_stories/main/Panel/Panel.stories.ts
@@ -15,6 +15,7 @@ import TitleLevel from "@ui5/webcomponents/dist/types/TitleLevel.js";
 
 
 const component = "ui5-panel";
+let index = 0;
 
 export default {
     title: "Main/Panel",
@@ -29,13 +30,15 @@ export default {
 
 const Template : UI5StoryArgs<Panel, StoryArgsSlots> = (args) => html`
 <ui5-panel
+	id="panel-${++index}"
 	accessible-role="${ifDefined(args.accessibleRole)}"
 	header-text="${ifDefined(args.headerText)}"
 	?fixed="${ifDefined(args.fixed)}"
 	?collapsed="${ifDefined(args.collapsed)}"
 	?no-animation="${ifDefined(args.noAnimation)}"
 	header-level="${ifDefined(args.headerLevel)}"
 	accessible-name="${ifDefined(args.accessibleName)}"
+	?sticky-header="${ifDefined(args.stickyHeader)}"
 >
 	${unsafeHTML(args.header)}
 	${unsafeHTML(args.default)}
@@ -88,6 +91,97 @@ FixedPanel.args = {
 };
 FixedPanel.storyName = "Fixed Panel (Can't be Collapsed/Expanded)";
 
+export const StickyHeader = Template.bind({});
+StickyHeader.decorators = [
+	(story) => {
+	return html`
+<style>
+	#panel-${index+1}::part(content) {
+		max-height: 50px;
+	}
+	#second-panel-stickyHeader::part(content) {
+		max-height: 100px;
+	}
+</style>
+<div style="height: 250px; overflow: scroll;">
+	${story()}
+<br />
+<ui5-panel id="second-panel-stickyHeader" sticky-header header-text="Second Panel with sticky header">
+	<ui5-title>Another Lorem ipsum!</ui5-title>
+
+	<ui5-label wrapping-type="Normal">
+		<span>
+			Lorem ipsum dolor sit amet, tamquam invidunt cu sed, unum regione mel ea, quo ea alia novum. Ne qui illud zril
+			nostrum, vel ea sint dicant postea. Vel ne facete tritani, neglegentur concludaturque sed te. His animal dolorum ut.
+			Aeterno appareat ei mei, cu sed elit scripserit, an quodsi oportere accusamus quo. Pri ea probo corpora rationibus,
+			soluta incorrupte ex his.
+			Mei ei brute cetero, id duo magna aeque torquatos. Quodsi erroribus mediocritatem his ut, ad pri legere iracundia
+			democritum. Menandri intellegam in mea, ex vero movet qualisque sed. Maiorum verterem perfecto nec ea, est velit
+			elaboraret consequuntur eu, eam ad reque postea admodum. Ne inimicus convenire pri, doctus vidisse te ius.
+			Percipitur contentiones in vis, cu vim propriae phaedrum. Has ad magna errem honestatis, duo vero graeco epicurei
+			no, populo semper sit ne. Vulputate dissentiunt interpretaris ea vis, nec civibus moderatius at. Cu vim stet
+			dissentias, no vidit saperet indoctum nec, et pro magna prima nobis. Vis consul feugiat qualisque in, regione
+			persecuti cotidieque id eos, id ius omnesque vituperata.
+			Lorem ipsum dolor sit amet, tamquam invidunt cu sed, unum regione mel ea, quo ea alia novum. Ne qui illud zril
+			nostrum, vel ea sint dicant postea. Vel ne facete tritani, neglegentur concludaturque sed te. His animal dolorum ut.
+			Aeterno appareat ei mei, cu sed elit scripserit, an quodsi oportere accusamus quo. Pri ea probo corpora rationibus,
+			soluta incorrupte ex his.
+			Mei ei brute cetero, id duo magna aeque torquatos. Quodsi erroribus mediocritatem his ut, ad pri legere iracundia
+			democritum. Menandri intellegam in mea, ex vero movet qualisque sed. Maiorum verterem perfecto nec ea, est velit
+			elaboraret consequuntur eu, eam ad reque postea admodum. Ne inimicus convenire pri, doctus vidisse te ius.
+			Percipitur contentiones in vis, cu vim propriae phaedrum. Has ad magna errem honestatis, duo vero graeco epicurei
+			no, populo semper sit ne. Vulputate dissentiunt interpretaris ea vis, nec civibus moderatius at. Cu vim stet
+			dissentias, no vidit saperet indoctum nec, et pro magna prima nobis. Vis consul feugiat qualisque in, regione
+			persecuti cotidieque id eos, id ius omnesque vituperata.
+			Lorem ipsum dolor sit amet, tamquam invidunt cu sed, unum regione mel ea, quo ea alia novum. Ne qui illud zril
+			nostrum, vel ea sint dicant postea. Vel ne facete tritani, neglegentur concludaturque sed te. His animal dolorum ut.
+			Aeterno appareat ei mei, cu sed elit scripserit, an quodsi oportere accusamus quo. Pri ea probo corpora rationibus,
+			soluta incorrupte ex his.
+			Mei ei brute cetero, id duo magna aeque torquatos. Quodsi erroribus mediocritatem his ut, ad pri legere iracundia
+			democritum. Menandri intellegam in mea, ex vero movet qualisque sed. Maiorum verterem perfecto nec ea, est velit
+			elaboraret consequuntur eu, eam ad reque postea admodum. Ne inimicus convenire pri, doctus vidisse te ius.
+			Percipitur contentiones in vis, cu vim propriae phaedrum. Has ad magna errem honestatis, duo vero graeco epicurei
+			no, populo semper sit ne. Vulputate dissentiunt interpretaris ea vis, nec civibus moderatius at. Cu vim stet
+			dissentias, no vidit saperet indoctum nec, et pro magna prima nobis. Vis consul feugiat qualisque in, regione
+			persecuti cotidieque id eos, id ius omnesque vituperata.
+		</span>
+	</ui5-label>
+</ui5-panel>
+</div>`
+	}
+]
+StickyHeader.args = {
+	default: `
+	<ui5-title>Lorem ipsum!</ui5-title>
+	<ui5-label id="contentSticky" wrapping-type="Normal">
+		<span>
+			Lorem ipsum dolor sit amet, tamquam invidunt cu sed, unum regione mel ea, quo ea alia novum. Ne qui illud zril
+			nostrum, vel ea sint dicant postea. Vel ne facete tritani, neglegentur concludaturque sed te. His animal dolorum ut.
+			Aeterno appareat ei mei, cu sed elit scripserit, an quodsi oportere accusamus quo. Pri ea probo corpora rationibus,
+			soluta incorrupte ex his.
+			Mei ei brute cetero, id duo magna aeque torquatos. Quodsi erroribus mediocritatem his ut, ad pri legere iracundia
+			democritum. Menandri intellegam in mea, ex vero movet qualisque sed. Maiorum verterem perfecto nec ea, est velit
+			elaboraret consequuntur eu, eam ad reque postea admodum. Ne inimicus convenire pri, doctus vidisse te ius.
+			Percipitur contentiones in vis, cu vim propriae phaedrum. Has ad magna errem honestatis, duo vero graeco epicurei
+			no, populo semper sit ne. Vulputate dissentiunt interpretaris ea vis, nec civibus moderatius at. Cu vim stet
+			dissentias, no vidit saperet indoctum nec, et pro magna prima nobis. Vis consul feugiat qualisque in, regione
+			persecuti cotidieque id eos, id ius omnesque vituperata.
+			Lorem ipsum dolor sit amet, tamquam invidunt cu sed, unum regione mel ea, quo ea alia novum. Ne qui illud zril
+			nostrum, vel ea sint dicant postea. Vel ne facete tritani, neglegentur concludaturque sed te. His animal dolorum ut.
+			Aeterno appareat ei mei, cu sed elit scripserit, an quodsi oportere accusamus quo. Pri ea probo corpora rationibus,
+			soluta incorrupte ex his.
+			Mei ei brute cetero, id duo magna aeque torquatos. Quodsi erroribus mediocritatem his ut, ad pri legere iracundia
+			democritum. Menandri intellegam in mea, ex vero movet qualisque sed. Maiorum verterem perfecto nec ea, est velit
+			elaboraret consequuntur eu, eam ad reque postea admodum. Ne inimicus convenire pri, doctus vidisse te ius.
+			Percipitur contentiones in vis, cu vim propriae phaedrum. Has ad magna errem honestatis, duo vero graeco epicurei
+			no, populo semper sit ne. Vulputate dissentiunt interpretaris ea vis, nec civibus moderatius at. Cu vim stet
+			dissentias, no vidit saperet indoctum nec, et pro magna prima nobis. Vis consul feugiat qualisque in, regione
+			persecuti cotidieque id eos, id ius omnesque vituperata.
+		</span>
+	</ui5-label>`,
+	headerText: "Sticky header",
+	stickyHeader: true
+};
 
 export const PanelCustomHeader = Template.bind({});
 PanelCustomHeader.decorators = [