feat: add minimum row height to dashboard

dev/dashboard-layout.html

@@ -24,6 +24,7 @@
       vaadin-dashboard-layout {
         --vaadin-dashboard-col-min-width: 300px;
         --vaadin-dashboard-col-max-width: 500px;
+        --vaadin-dashboard-row-min-height: 300px;
         --vaadin-dashboard-gap: 20px;
         --vaadin-dashboard-col-max-count: 3;
       }

dev/dashboard.html

@@ -18,6 +18,7 @@
       vaadin-dashboard {
         --vaadin-dashboard-col-min-width: 300px;
         --vaadin-dashboard-col-max-width: 500px;
+        --vaadin-dashboard-row-min-height: 300px;
         --vaadin-dashboard-gap: 20px;
         --vaadin-dashboard-col-max-count: 3;
       }

packages/dashboard/src/vaadin-dashboard-layout-mixin.js

@@ -54,6 +54,9 @@ export const DashboardLayoutMixin = (superClass) =>
             var(--_vaadin-dashboard-col-max-count)
           );
 
+          /* Effective row height */
+          --_vaadin-dashboard-row-height: minmax(var(--vaadin-dashboard-row-min-height, auto), auto);
+
           display: grid;
           overflow: auto;
           height: 100%;
@@ -63,6 +66,8 @@ export const DashboardLayoutMixin = (superClass) =>
             minmax(var(--_vaadin-dashboard-col-min-width), var(--_vaadin-dashboard-col-max-width))
           );
 
+          grid-auto-rows: var(--_vaadin-dashboard-row-height);
+
           gap: var(--vaadin-dashboard-gap, 1rem);
         }
 

packages/dashboard/src/vaadin-dashboard-section.js

@@ -37,6 +37,13 @@ class DashboardSection extends ControllerMixin(ElementMixin(PolylitMixin(LitElem
         --_vaadin-dashboard-section-column: 1 / calc(var(--_vaadin-dashboard-effective-col-count) + 1);
         grid-column: var(--_vaadin-dashboard-section-column) !important;
         gap: var(--vaadin-dashboard-gap, 1rem);
+        /* Dashbaord section header height */
+        --_vaadin-dashboard-section-header-height: minmax(0, auto);
+        grid-template-rows: var(--_vaadin-dashboard-section-header-height) repeat(
+            auto-fill,
+            var(--_vaadin-dashboard-row-height)
+          );
+        grid-auto-rows: var(--_vaadin-dashboard-row-height);
       }
 
       :host([hidden]) {

packages/dashboard/test/dashboard-layout.test.ts

@@ -3,6 +3,7 @@ import { fixtureSync, nextFrame } from '@vaadin/testing-helpers';
 import '../vaadin-dashboard-layout.js';
 import '../vaadin-dashboard-section.js';
 import type { DashboardLayout } from '../vaadin-dashboard-layout.js';
+import type { DashboardSection } from '../vaadin-dashboard-section.js';
 import {
   getColumnWidths,
   getElementFromCell,
@@ -13,6 +14,7 @@ import {
   setMaximumColumnCount,
   setMaximumColumnWidth,
   setMinimumColumnWidth,
+  setMinimumRowHeight,
 } from './helpers.js';
 
 /**
@@ -199,6 +201,33 @@ describe('dashboard layout', () => {
     });
   });
 
+  describe('minimum row height', () => {
+    const rowHeight = 100;
+
+    it('should have the row height of the highest wigdet on a row by default', () => {
+      childElements[0].style.height = `${rowHeight}px`;
+      childElements[1].style.height = '50px';
+      expect(getRowHeights(dashboard)).to.eql([rowHeight]);
+    });
+
+    it('should set a minimum row height', () => {
+      setMinimumRowHeight(dashboard, rowHeight);
+      expect(getRowHeights(dashboard)).to.eql([rowHeight]);
+    });
+
+    it('should not constrain widgets to the minumum row height', () => {
+      childElements[0].style.height = `${rowHeight * 2}px`;
+      setMinimumRowHeight(dashboard, rowHeight);
+      expect(getRowHeights(dashboard)).to.eql([rowHeight * 2]);
+    });
+
+    it('should use minimum row height for all rows', () => {
+      dashboard.style.width = `${columnWidth}px`;
+      setMinimumRowHeight(dashboard, rowHeight);
+      expect(getRowHeights(dashboard)).to.eql([rowHeight, rowHeight]);
+    });
+  });
+
   describe('column span', () => {
     it('should span multiple columns', async () => {
       setColspan(childElements[0], 2);
@@ -365,9 +394,11 @@ describe('dashboard layout', () => {
   });
 
   describe('section', () => {
+    let section: DashboardSection;
+
     beforeEach(async () => {
-      const section = fixtureSync(`
-        <vaadin-dashboard-section>
+      section = fixtureSync(`
+        <vaadin-dashboard-section section-title="Section">
           <div id="item-2">Section item 2</div>
           <div id="item-3">Section item 3</div>
         </vaadin-dashboard-section>
@@ -434,6 +465,27 @@ describe('dashboard layout', () => {
       ]);
     });
 
+    it('should use minimum row height for all section rows', async () => {
+      dashboard.style.width = `${columnWidth}px`;
+      setMinimumRowHeight(dashboard, 300);
+      await nextFrame();
+
+      expect(childElements[2].offsetHeight).to.eql(300);
+      expect(childElements[3].offsetHeight).to.eql(300);
+    });
+
+    it('should not use minimum row height for section header row', async () => {
+      const title = section.querySelector<HTMLHeadingElement>('[slot="title"]')!;
+      title.style.height = '100%';
+
+      const titleHeight = title.offsetHeight;
+      setMinimumRowHeight(dashboard, 300);
+      await nextFrame();
+
+      const newTitleHeight = title.offsetHeight;
+      expect(newTitleHeight).to.eql(titleHeight);
+    });
+
     describe('gap', () => {
       it('should have a default gap', () => {
         // Clear the gap used in the tests

packages/dashboard/test/helpers.ts

@@ -98,3 +98,10 @@ export function setGap(dashboard: HTMLElement, gap?: number): void {
 export function setMaximumColumnCount(dashboard: HTMLElement, count?: number): void {
   dashboard.style.setProperty('--vaadin-dashboard-col-max-count', count !== undefined ? `${count}` : null);
 }
+
+/**
+ * Sets the minimum row height of the dashboard.
+ */
+export function setMinimumRowHeight(dashboard: HTMLElement, height?: number): void {
+  dashboard.style.setProperty('--vaadin-dashboard-row-min-height', height !== undefined ? `${height}px` : null);
+}