experiment: add dashboard base styles and visual tests

packages/component-base/src/style-props.js

@@ -61,12 +61,14 @@ addGlobalThemeStyles(
         --_vaadin-icon-chevron-down: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="m19.5 8.25-7.5 7.5-7.5-7.5" /></svg>');
         --_vaadin-icon-clock: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M12 6v6h4.5m4.5 0a9 9 0 1 1-18 0 9 9 0 0 1 18 0Z" /></svg>');
         --_vaadin-icon-cross: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M6 18 18 6M6 6l12 12" /></svg>');
+        --_vaadin-icon-drag: url('data:image/svg+xml;utf8,<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M11 7c0 .82843-.6716 1.5-1.5 1.5C8.67157 8.5 8 7.82843 8 7s.67157-1.5 1.5-1.5c.8284 0 1.5.67157 1.5 1.5Zm0 5c0 .8284-.6716 1.5-1.5 1.5-.82843 0-1.5-.6716-1.5-1.5s.67157-1.5 1.5-1.5c.8284 0 1.5.6716 1.5 1.5Zm0 5c0 .8284-.6716 1.5-1.5 1.5-.82843 0-1.5-.6716-1.5-1.5s.67157-1.5 1.5-1.5c.8284 0 1.5.6716 1.5 1.5Zm5-10c0 .82843-.6716 1.5-1.5 1.5S13 7.82843 13 7s.6716-1.5 1.5-1.5S16 6.17157 16 7Zm0 5c0 .8284-.6716 1.5-1.5 1.5S13 12.8284 13 12s.6716-1.5 1.5-1.5 1.5.6716 1.5 1.5Zm0 5c0 .8284-.6716 1.5-1.5 1.5S13 17.8284 13 17s.6716-1.5 1.5-1.5 1.5.6716 1.5 1.5Z" fill="currentColor"/></svg>');
         --_vaadin-icon-eye: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M2.036 12.322a1.012 1.012 0 0 1 0-.639C3.423 7.51 7.36 4.5 12 4.5c4.638 0 8.573 3.007 9.963 7.178.07.207.07.431 0 .639C20.577 16.49 16.64 19.5 12 19.5c-4.638 0-8.573-3.007-9.963-7.178Z" /><path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z" /></svg>');
         --_vaadin-icon-eye-slash: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M3.98 8.223A10.477 10.477 0 0 0 1.934 12C3.226 16.338 7.244 19.5 12 19.5c.993 0 1.953-.138 2.863-.395M6.228 6.228A10.451 10.451 0 0 1 12 4.5c4.756 0 8.773 3.162 10.065 7.498a10.522 10.522 0 0 1-4.293 5.774M6.228 6.228 3 3m3.228 3.228 3.65 3.65m7.894 7.894L21 21m-3.228-3.228-3.65-3.65m0 0a3 3 0 1 0-4.243-4.243m4.242 4.242L9.88 9.88" /></svg>');
         --_vaadin-icon-fullscreen: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M3.75 3.75v4.5m0-4.5h4.5m-4.5 0L9 9M3.75 20.25v-4.5m0 4.5h4.5m-4.5 0L9 15M20.25 3.75h-4.5m4.5 0v4.5m0-4.5L15 9m5.25 11.25h-4.5m4.5 0v-4.5m0 4.5L15 15" /></svg>');
         --_vaadin-icon-menu: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5" /></svg>');
         --_vaadin-icon-minus: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M5 12h14" /></svg>');
         --_vaadin-icon-plus: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M12 4.5v15m7.5-7.5h-15" /></svg>');
+        --_vaadin-icon-resize: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24"><path fill-rule="evenodd" clip-rule="evenodd" d="M18.5303 7.46967c.2929.29289.2929.76777 0 1.06066L8.53033 18.5304c-.29289.2929-.76777.2929-1.06066 0s-.29289-.7678 0-1.0607L17.4697 7.46967c.2929-.29289.7677-.29289 1.0606 0Zm0 4.50003c.2929.2929.2929.7678 0 1.0607l-5.5 5.5c-.2929.2928-.7677.2928-1.0606 0-.2929-.2929-.2929-.7678 0-1.0607l5.4999-5.5c.2929-.2929.7678-.2929 1.0607 0Zm0 4.5c.2929.2928.2929.7677 0 1.0606l-1 1.0001c-.2929.2928-.7677.2929-1.0606 0-.2929-.2929-.2929-.7678 0-1.0607l1-1c.2929-.2929.7677-.2929 1.0606 0Z" fill="currentColor"/></svg>');
         --_vaadin-icon-sort: url('data:image/svg+xml;utf8,<svg width="8" height="12" viewBox="0 0 8 12" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M7.49854 6.99951C7.92795 6.99951 8.15791 7.50528 7.87549 7.82861L4.37646 11.8296C4.17728 12.0571 3.82272 12.0571 3.62354 11.8296L0.125488 7.82861C-0.157248 7.50531 0.0719873 6.99956 0.501465 6.99951H7.49854ZM3.62354 0.17041C3.82275 -0.0573875 4.17725 -0.0573848 4.37646 0.17041L7.87549 4.17041C8.15825 4.49373 7.92806 5.00049 7.49854 5.00049L0.501465 4.99951C0.0719873 4.99946 -0.157248 4.49371 0.125488 4.17041L3.62354 0.17041Z" fill="black"/></svg>');
         --_vaadin-icon-user: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none"><path d="M3 20C5.33579 17.5226 8.50702 16 12 16C15.493 16 18.6642 17.5226 21 20M16.5 7.5C16.5 9.98528 14.4853 12 12 12C9.51472 12 7.5 9.98528 7.5 7.5C7.5 5.01472 9.51472 3 12 3C14.4853 3 16.5 5.01472 16.5 7.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>');
         --_vaadin-icon-warn: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M12 9v3.75m-9.303 3.376c-.866 1.5.217 3.374 1.948 3.374h14.71c1.73 0 2.813-1.874 1.948-3.374L13.949 3.378c-.866-1.5-3.032-1.5-3.898 0L2.697 16.126ZM12 15.75h.007v.008H12v-.008Z" /></svg>');

packages/dashboard/package.json

@@ -21,6 +21,8 @@
   "type": "module",
   "files": [
     "src",
+    "!src/styles/*-base-styles.d.ts",
+    "!src/styles/*-base-styles.js",
     "theme",
     "vaadin-*.d.ts",
     "vaadin-*.js",

packages/dashboard/src/styles/vaadin-dashboard-base-styles.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import type { CSSResult } from 'lit';
+
+export const dashboardStyles: CSSResult;

packages/dashboard/src/styles/vaadin-dashboard-base-styles.js

@@ -0,0 +1,25 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import { css } from 'lit';
+import { dashboardLayoutStyles } from './vaadin-dashboard-layout-core-styles.js';
+
+const dashboard = css`
+  #grid[item-resizing] {
+    -webkit-user-select: none;
+    user-select: none;
+  }
+
+  ::slotted(vaadin-dashboard-widget-wrapper) {
+    display: contents;
+  }
+`;
+
+export const dashboardStyles = [dashboardLayoutStyles, dashboard];

packages/dashboard/src/styles/vaadin-dashboard-button-base-styles.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import type { CSSResult } from 'lit';
+
+export const dashboardButtonStyles: CSSResult;

packages/dashboard/src/styles/vaadin-dashboard-button-base-styles.js

@@ -0,0 +1,20 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import { css } from 'lit';
+import { buttonStyles } from '@vaadin/button/src/styles/vaadin-button-core-styles.js';
+
+const dashboardButton = css`
+  :host {
+    min-width: 1rem;
+  }
+`;
+
+export const dashboardButtonStyles = [buttonStyles, dashboardButton];

packages/dashboard/src/styles/vaadin-dashboard-layout-base-styles.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import type { CSSResult } from 'lit';
+
+export const dashboardLayoutStyles: CSSResult;

packages/dashboard/src/styles/vaadin-dashboard-layout-base-styles.js

@@ -0,0 +1,85 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import { css } from 'lit';
+
+export const dashboardLayoutStyles = css`
+  :host {
+    display: block;
+    overflow: auto;
+    box-sizing: border-box;
+    width: 100%;
+  }
+
+  :host([hidden]) {
+    display: none !important;
+  }
+
+  :host([dense-layout]) #grid {
+    grid-auto-flow: dense;
+  }
+
+  #grid {
+    box-sizing: border-box;
+
+    /* Padding around dashboard edges */
+    --_default-padding: 1rem;
+    --_padding: max(0px, var(--vaadin-dashboard-padding, var(--_default-padding)));
+    padding: var(--_padding);
+
+    /* Gap between widgets */
+    --_default-gap: 1rem;
+    --_gap: max(0px, var(--vaadin-dashboard-gap, var(--_default-gap)));
+    gap: var(--_gap);
+
+    /* Default min and max column widths */
+    --_default-col-min-width: 25rem;
+    --_default-col-max-width: 1fr;
+
+    /* Effective min and max column widths */
+    --_col-min-width: var(--vaadin-dashboard-col-min-width, var(--_default-col-min-width));
+    --_col-max-width: var(--vaadin-dashboard-col-max-width, var(--_default-col-max-width));
+
+    /* Effective max column count */
+    --_col-max-count: var(--vaadin-dashboard-col-max-count, var(--_col-count));
+
+    /* Effective column count */
+    --_effective-col-count: min(var(--_col-count), var(--_col-max-count));
+
+    /* Default row min height */
+    --_default-row-min-height: 12rem;
+    /* Effective row min height */
+    --_row-min-height: var(--vaadin-dashboard-row-min-height, var(--_default-row-min-height));
+    /* Effective row height */
+    --_row-height: minmax(var(--_row-min-height, auto), auto);
+
+    display: grid;
+    overflow: hidden;
+    min-width: calc(var(--_col-min-width) + var(--_padding) * 2);
+
+    grid-template-columns: repeat(
+      var(--_effective-col-count, auto-fill),
+      minmax(var(--_col-min-width), var(--_col-max-width))
+    );
+
+    grid-auto-rows: var(--_row-height);
+  }
+
+  ::slotted(*) {
+    /* The grid-column value applied to children */
+    --_item-column: span min(var(--vaadin-dashboard-widget-colspan, 1), var(--_effective-col-count, var(--_col-count)));
+
+    grid-column: var(--_item-column);
+
+    /* The grid-row value applied to children */
+    --_item-row: span var(--vaadin-dashboard-widget-rowspan, 1);
+    grid-row: var(--_item-row);
+  }
+`;

packages/dashboard/src/styles/vaadin-dashboard-section-base-styles.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import type { CSSResult } from 'lit';
+
+export const dashboardSectionStyles: CSSResult;

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

@@ -0,0 +1,75 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import '@vaadin/component-base/src/style-props.js';
+import { css } from 'lit';
+import { dashboardWidgetAndSectionStyles } from './vaadin-dashboard-widget-section-core-styles.js';
+
+const sectionStyles = css`
+  :host {
+    display: grid;
+    position: relative;
+    grid-template-columns: subgrid;
+    --_section-column: 1 / calc(var(--_effective-col-count) + 1);
+    grid-column: var(--_section-column) !important;
+    gap: var(--_gap, 1rem);
+    /* Dashboard section header height */
+    --_section-header-height: minmax(0, auto);
+    grid-template-rows: var(--_section-header-height) repeat(auto-fill, var(--_row-height));
+    grid-auto-rows: var(--_row-height);
+    border-radius: var(--vaadin-radius-m);
+    --_section-outline-offset: calc(min(var(--_gap), var(--_padding)) / 3);
+    --_focus-ring-offset: calc((var(--_section-outline-offset) - var(--_focus-ring-width)));
+  }
+
+  :host([hidden]) {
+    display: none !important;
+  }
+
+  ::slotted(*) {
+    --_item-column: span min(var(--vaadin-dashboard-widget-colspan, 1), var(--_effective-col-count, var(--_col-count)));
+
+    grid-column: var(--_item-column);
+    --_item-row: span var(--vaadin-dashboard-widget-rowspan, 1);
+    grid-row: var(--_item-row);
+  }
+
+  header {
+    grid-column: var(--_section-column);
+  }
+
+  :host::before {
+    z-index: 2 !important;
+  }
+
+  ::slotted(vaadin-dashboard-widget-wrapper) {
+    display: contents;
+  }
+
+  /* Section states */
+
+  :host([editable]) {
+    outline: 1px solid var(--vaadin-border-color);
+    outline-offset: calc(var(--_section-outline-offset) - 1px);
+  }
+
+  :host([focused])::after {
+    content: '';
+    display: block;
+    position: absolute;
+    inset: 0;
+    border-radius: var(--vaadin-radius-m);
+    z-index: 9;
+    outline: var(--_focus-ring-width) solid var(--_focus-ring-color);
+    outline-offset: var(--_focus-ring-offset);
+  }
+`;
+
+export const dashboardSectionStyles = [sectionStyles, dashboardWidgetAndSectionStyles];

packages/dashboard/src/styles/vaadin-dashboard-widget-base-styles.d.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright (c) 2000 - 2025 Vaadin Ltd.
+ *
+ * This program is available under Vaadin Commercial License and Service Terms.
+ *
+ *
+ * See https://vaadin.com/commercial-license-and-service-terms for the full
+ * license.
+ */
+import type { CSSResult } from 'lit';
+
+export const dashboardWidgetStyles: CSSResult;