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A free, flexible and high-quality Web Component for showing large amounts of tabular data
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/**
* @license
* Copyright (c) 2016 - 2024 Vaadin Ltd.
* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/
import './vaadin-grid-column.js';
import { html, PolymerElement } from '@polymer/polymer/polymer-element.js';
import { ControllerMixin } from '@vaadin/component-base/src/controller-mixin.js';
import { defineCustomElement } from '@vaadin/component-base/src/define.js';
import { ElementMixin } from '@vaadin/component-base/src/element-mixin.js';
import { registerStyles, ThemableMixin } from '@vaadin/vaadin-themable-mixin/vaadin-themable-mixin.js';
import { GridMixin } from './vaadin-grid-mixin.js';
import { gridStyles } from './vaadin-grid-styles.js';
registerStyles('vaadin-grid', gridStyles, { moduleId: 'vaadin-grid-styles' });
/**
* `` is a free, high quality data grid / data table Web Component. The content of the
* the grid can be populated by using renderer callback function.
*
* ### Quick Start
*
* Start with an assigning an array to the [`items`](#/elements/vaadin-grid#property-items) property to visualize your data.
*
* Use the [``](#/elements/vaadin-grid-column) element to configure the grid columns. Set `path` and `header`
* shorthand properties for the columns to define what gets rendered in the cells of the column.
*
* #### Example:
* ```html
*
*
* ```
*
* For custom content `vaadin-grid-column` element provides you with three types of `renderer` callback functions: `headerRenderer`,
* `renderer` and `footerRenderer`.
*
* Each of those renderer functions provides `root`, `column`, `model` arguments when applicable.
* Generate DOM content, append it to the `root` element and control the state
* of the host element by accessing `column`. Before generating new content,
* users are able to check if there is already content in `root` for reusing it.
*
* Renderers are called on initialization of new column cells and each time the
* related row model is updated. DOM generated during the renderer call can be reused
* in the next renderer call and will be provided with the `root` argument.
* On first call it will be empty.
*
* #### Example:
* ```html
*
*
* ```
* ```js
* const grid = document.querySelector('vaadin-grid');
* grid.items = [{'name': 'John', 'surname': 'Lennon', 'role': 'singer'},
* {'name': 'Ringo', 'surname': 'Starr', 'role': 'drums'}];
*
* const columns = grid.querySelectorAll('vaadin-grid-column');
*
* columns[0].headerRenderer = function(root) {
* root.textContent = 'Name';
* };
* columns[0].renderer = function(root, column, model) {
* root.textContent = model.item.name;
* };
*
* columns[1].headerRenderer = function(root) {
* root.textContent = 'Surname';
* };
* columns[1].renderer = function(root, column, model) {
* root.textContent = model.item.surname;
* };
*
* columns[2].headerRenderer = function(root) {
* root.textContent = 'Role';
* };
* columns[2].renderer = function(root, column, model) {
* root.textContent = model.item.role;
* };
* ```
*
* The following properties are available in the `model` argument:
*
* Property name | Type | Description
* --------------|------|------------
* `index`| Number | The index of the item.
* `item` | String or Object | The item.
* `level` | Number | Number of the item's tree sublevel, starts from 0.
* `expanded` | Boolean | True if the item's tree sublevel is expanded.
* `selected` | Boolean | True if the item is selected.
* `detailsOpened` | Boolean | True if the item's row details are open.
*
* The following helper elements can be used for further customization:
* - [``](#/elements/vaadin-grid-column-group)
* - [``](#/elements/vaadin-grid-filter)
* - [``](#/elements/vaadin-grid-sorter)
* - [``](#/elements/vaadin-grid-selection-column)
* - [``](#/elements/vaadin-grid-tree-toggle)
*
* __Note that the helper elements must be explicitly imported.__
* If you want to import everything at once you can use the `all-imports.html` bundle.
*
* ### Lazy Loading with Function Data Provider
*
* In addition to assigning an array to the items property, you can alternatively
* provide the `` data through the
* [`dataProvider`](#/elements/vaadin-grid#property-dataProvider) function property.
* The `` calls this function lazily, only when it needs more data
* to be displayed.
*
* See the [`dataProvider`](#/elements/vaadin-grid#property-dataProvider) property
* documentation for the detailed data provider arguments description.
*
* __Note that expanding the tree grid's item will trigger a call to the `dataProvider`.__
*
* __Also, note that when using function data providers, the total number of items
* needs to be set manually. The total number of items can be returned
* in the second argument of the data provider callback:__
*
* ```javascript
* grid.dataProvider = ({page, pageSize}, callback) => {
* // page: the requested page index
* // pageSize: number of items on one page
* const url = `https://api.example/data?page=${page}&per_page=${pageSize}`;
*
* fetch(url)
* .then((res) => res.json())
* .then(({ employees, totalSize }) => {
* callback(employees, totalSize);
* });
* };
* ```
*
* __Alternatively, you can use the `size` property to set the total number of items:__
*
* ```javascript
* grid.size = 200; // The total number of items
* grid.dataProvider = ({page, pageSize}, callback) => {
* const url = `https://api.example/data?page=${page}&per_page=${pageSize}`;
*
* fetch(url)
* .then((res) => res.json())
* .then((resJson) => callback(resJson.employees));
* };
* ```
*
* ### Styling
*
* The following shadow DOM parts are available for styling:
*
* Part name | Description
* ---------------------------|----------------
* `row` | Row in the internal table
* `body-row` | Body row in the internal table
* `collapsed-row` | Collapsed row
* `expanded-row` | Expanded row
* `selected-row` | Selected row
* `details-opened-row` | Row with details open
* `odd-row` | Odd row
* `even-row` | Even row
* `first-row` | The first body row
* `last-row` | The last body row
* `dragstart-row` | Set on the row for one frame when drag is starting.
* `dragover-above-row` | Set on the row when the a row is dragged over above
* `dragover-below-row` | Set on the row when the a row is dragged over below
* `dragover-on-top-row` | Set on the row when the a row is dragged over on top
* `drag-disabled-row` | Set to a row that isn't available for dragging
* `drop-disabled-row` | Set to a row that can't be dropped on top of
* `cell` | Cell in the internal table
* `header-cell` | Header cell in the internal table
* `body-cell` | Body cell in the internal table
* `footer-cell` | Footer cell in the internal table
* `details-cell` | Row details cell in the internal table
* `focused-cell` | Focused cell in the internal table
* `odd-row-cell` | Cell in an odd row
* `even-row-cell` | Cell in an even row
* `first-row-cell` | Cell in the first body row
* `last-row-cell` | Cell in the last body row
* `first-header-row-cell` | Cell in the first header row
* `first-footer-row-cell` | Cell in the first footer row
* `last-header-row-cell` | Cell in the last header row
* `last-footer-row-cell` | Cell in the last footer row
* `loading-row-cell` | Cell in a row that is waiting for data from data provider
* `selected-row-cell` | Cell in a selected row
* `collapsed-row-cell` | Cell in a collapsed row
* `expanded-row-cell` | Cell in an expanded row
* `details-opened-row-cell` | Cell in an row with details open
* `dragstart-row-cell` | Cell in a row that user started to drag (set for one frame)
* `dragover-above-row-cell` | Cell in a row that has another row dragged over above
* `dragover-below-row-cell` | Cell in a row that has another row dragged over below
* `dragover-on-top-row-cell` | Cell in a row that has another row dragged over on top
* `drag-disabled-row-cell` | Cell in a row that isn't available for dragging
* `drop-disabled-row-cell` | Cell in a row that can't be dropped on top of
* `frozen-cell` | Frozen cell in the internal table
* `frozen-to-end-cell` | Frozen to end cell in the internal table
* `last-frozen-cell` | Last frozen cell
* `first-frozen-to-end-cell` | First cell frozen to end
* `first-column-cell` | First visible cell on a row
* `last-column-cell` | Last visible cell on a row
* `reorder-allowed-cell` | Cell in a column where another column can be reordered
* `reorder-dragging-cell` | Cell in a column currently being reordered
* `resize-handle` | Handle for resizing the columns
* `reorder-ghost` | Ghost element of the header cell being dragged
*
* The following state attributes are available for styling:
*
* Attribute | Description | Part name
* ----------------------|---------------------------------------------------------------------------------------------------|-----------
* `loading` | Set when the grid is loading data from data provider | :host
* `interacting` | Keyboard navigation in interaction mode | :host
* `navigating` | Keyboard navigation in navigation mode | :host
* `overflow` | Set when rows are overflowing the grid viewport. Possible values: `top`, `bottom`, `start`, `end` | :host
* `reordering` | Set when the grid's columns are being reordered | :host
* `dragover` | Set when the grid (not a specific row) is dragged over | :host
* `dragging-rows` | Set when grid rows are dragged | :host
* `reorder-status` | Reflects the status of a cell while columns are being reordered | cell
* `frozen` | Frozen cell | cell
* `frozen-to-end` | Cell frozen to end | cell
* `last-frozen` | Last frozen cell | cell
* `first-frozen-to-end` | First cell frozen to end | cell
* `first-column` | First visible cell on a row | cell
* `last-column` | Last visible cell on a row | cell
* `selected` | Selected row | row
* `expanded` | Expanded row | row
* `details-opened` | Row with details open | row
* `loading` | Row that is waiting for data from data provider | row
* `odd` | Odd row | row
* `first` | The first body row | row
* `last` | The last body row | row
* `dragstart` | Set for one frame when starting to drag a row. The value is a number when dragging multiple rows | row
* `dragover` | Set when the row is dragged over | row
* `drag-disabled` | Set to a row that isn't available for dragging | row
* `drop-disabled` | Set to a row that can't be dropped on top of | row
*
* See [Styling Components](https://vaadin.com/docs/latest/styling/styling-components) documentation.
*
* @fires {CustomEvent} active-item-changed - Fired when the `activeItem` property changes.
* @fires {CustomEvent} cell-activate - Fired when the cell is activated with click or keyboard.
* @fires {CustomEvent} cell-focus - Fired when a cell is focused with click or keyboard navigation.
* @fires {CustomEvent} column-reorder - Fired when the columns in the grid are reordered.
* @fires {CustomEvent} column-resize - Fired when the grid column resize is finished.
* @fires {CustomEvent} data-provider-changed - Fired when the `dataProvider` property changes.
* @fires {CustomEvent} expanded-items-changed - Fired when the `expandedItems` property changes.
* @fires {CustomEvent} grid-dragstart - Fired when starting to drag grid rows.
* @fires {CustomEvent} grid-dragend - Fired when the dragging of the rows ends.
* @fires {CustomEvent} grid-drop - Fired when a drop occurs on top of the grid.
* @fires {CustomEvent} loading-changed - Fired when the `loading` property changes.
* @fires {CustomEvent} selected-items-changed - Fired when the `selectedItems` property changes.
* @fires {CustomEvent} size-changed - Fired when the `size` property changes.
*
* @customElement
* @extends HTMLElement
* @mixes GridMixin
* @mixes ThemableMixin
* @mixes ControllerMixin
*/
class Grid extends GridMixin(ElementMixin(ThemableMixin(ControllerMixin(PolymerElement)))) {
static get template() {
return html`