feat(footer): add row selection count to the footer component

src/app/modules/angular-slickgrid/components/__tests__/angular-slickgrid-constructor.spec.ts

@@ -229,7 +229,7 @@ const mockGrid = {
   setSelectedRows: jest.fn(),
   onRendered: jest.fn(),
   onScroll: jest.fn(),
-  onDataviewCreated: new Slick.Event(),
+  onSelectedRowsChanged: new Slick.Event(),
 };
 
 const mockSlickCoreImplementation = jest.fn().mockImplementation(() => (mockSlickCore));
@@ -1441,6 +1441,7 @@ describe('Angular-Slickgrid Custom Component instantiated via Constructor', () =
           expect(component.showCustomFooter).toBeTrue();
           expect(component.customFooterOptions).toEqual({
             dateFormat: 'yyyy-MM-dd, hh:mm aaaaa\'m\'',
+            hideRowSelectionCount: false,
             hideLastUpdateTimestamp: true,
             hideTotalItemCount: false,
             footerHeight: 20,
@@ -1449,6 +1450,8 @@ describe('Angular-Slickgrid Custom Component instantiated via Constructor', () =
             metricTexts: {
               items: 'items',
               itemsKey: 'ITEMS',
+              itemsSelected: 'items selected',
+              itemsSelectedKey: 'ITEMS_SELECTED',
               of: 'of',
               ofKey: 'OF',
             },
@@ -1479,6 +1482,7 @@ describe('Angular-Slickgrid Custom Component instantiated via Constructor', () =
           expect(component.showCustomFooter).toBeTrue();
           expect(component.customFooterOptions).toEqual({
             dateFormat: 'yyyy-MM-dd, hh:mm aaaaa\'m\'',
+            hideRowSelectionCount: false,
             hideLastUpdateTimestamp: true,
             hideTotalItemCount: false,
             footerHeight: 20,
@@ -1487,6 +1491,8 @@ describe('Angular-Slickgrid Custom Component instantiated via Constructor', () =
             metricTexts: {
               items: 'some items',
               itemsKey: 'ITEMS',
+              itemsSelected: 'items selected',
+              itemsSelectedKey: 'ITEMS_SELECTED',
               lastUpdate: 'some last update',
               of: 'some of',
               ofKey: 'OF',

src/app/modules/angular-slickgrid/components/__tests__/angular-slickgrid.component.spec.ts

@@ -45,6 +45,12 @@ import {
 } from '../../extensions';
 import * as utilities from '../../services/utilities';
 
+declare const Slick: any;
+
+function removeExtraSpaces(text: string) {
+  return `${text}`.replace(/\s{2,}/g, '');
+}
+
 const mockConvertParentChildArray = jest.fn();
 // @ts-ignore
 utilities.convertParentChildArrayToHierarchicalView = mockConvertParentChildArray;
@@ -306,4 +312,72 @@ describe('App Component', () => {
       }, 10);
     });
   });
+
+  describe('Custom Footer', () => {
+    it('should display 1 items selected on the left side footer section after triggering "onSelectedRowsChanged" event', () => {
+      const mockColDefs = [{ id: 'name', field: 'name', editor: undefined, internalColumnEditor: {} }];
+
+      component.gridId = 'grid1';
+      component.gridOptions = {
+        enablePagination: false,
+        showCustomFooter: true,
+        enableCheckboxSelector: true,
+        customFooterOptions: {
+          hideRowSelectionCount: false
+        }
+      } as GridOption;
+      fixture.detectChanges();
+      component.columnDefinitions = mockColDefs;
+      component.grid.setSelectionModel(new Slick.CellSelectionModel());
+      component.grid.onSelectedRowsChanged.notify({ rows: [1], previousSelectedRows: [] });
+      fixture.detectChanges();
+
+      const gridContainerElm = document.querySelector('.slickgrid-container') as HTMLDivElement;
+      const gridPaneElm = document.querySelector('.gridPane') as HTMLDivElement;
+      const footerContainerElm = document.querySelector('div.slick-custom-footer') as HTMLDivElement;
+      const leftFooterElm = document.querySelector('div.slick-custom-footer > div.left-footer') as HTMLSpanElement;
+      const rightFooterElm = document.querySelector('div.slick-custom-footer > div.metrics') as HTMLSpanElement;
+
+      expect(gridPaneElm.id).toBe('slickGridContainer-grid1');
+      expect(gridContainerElm.id).toBe('grid1');
+      expect(footerContainerElm).toBeTruthy();
+      expect(rightFooterElm).toBeTruthy();
+      expect(leftFooterElm).toBeTruthy();
+      expect(component.gridOptions.customFooterOptions!.leftFooterText).toBe('1 items selected');
+      expect(leftFooterElm.innerHTML).toContain('1 items selected');
+    });
+
+    it('should not not display row selection count after triggering "onSelectedRowsChanged" event when "hideRowSelectionCount" is set to True', () => {
+      const mockColDefs = [{ id: 'name', field: 'name', editor: undefined, internalColumnEditor: {} }];
+
+      component.gridId = 'grid1';
+      component.gridOptions = {
+        enablePagination: false,
+        showCustomFooter: true,
+        enableCheckboxSelector: true,
+        customFooterOptions: {
+          hideRowSelectionCount: true
+        }
+      } as GridOption;
+      fixture.detectChanges();
+      component.columnDefinitions = mockColDefs;
+      component.grid.setSelectionModel(new Slick.CellSelectionModel());
+      component.grid.onSelectedRowsChanged.notify({ rows: [1], previousSelectedRows: [] });
+      fixture.detectChanges();
+
+      const gridContainerElm = document.querySelector('.slickgrid-container') as HTMLDivElement;
+      const gridPaneElm = document.querySelector('.gridPane') as HTMLDivElement;
+      const footerContainerElm = document.querySelector('div.slick-custom-footer') as HTMLDivElement;
+      const leftFooterElm = document.querySelector('div.slick-custom-footer > div.left-footer') as HTMLSpanElement;
+      const rightFooterElm = document.querySelector('div.slick-custom-footer > div.metrics') as HTMLSpanElement;
+
+      expect(gridPaneElm.id).toBe('slickGridContainer-grid1');
+      expect(gridContainerElm.id).toBe('grid1');
+      expect(footerContainerElm).toBeTruthy();
+      expect(rightFooterElm).toBeTruthy();
+      expect(leftFooterElm).toBeTruthy();
+      expect(component.gridOptions.customFooterOptions!.leftFooterText).toBeFalsy();
+      expect(leftFooterElm.innerHTML).toBeFalsy();
+    });
+  });
 });

src/app/modules/angular-slickgrid/components/__tests__/slick-pagination.component.spec.ts

@@ -57,13 +57,15 @@ describe('App Component', () => {
     translate.setTranslation('fr', {
       ITEMS: 'éléments',
       ITEMS_PER_PAGE: 'éléments par page',
+      ITEMS_SELECTED: 'éléments sélectionnés',
       OF: 'de',
       PAGE: 'Page',
       PAGE_X_OF_Y: 'page {{x}} de {{y}}',
     });
     translate.setTranslation('en', {
       ITEMS: 'items',
       ITEMS_PER_PAGE: 'items per page',
+      ITEMS_SELECTED: 'items selected',
       OF: 'of',
       PAGE: 'Page',
       PAGE_X_OF_Y: 'page {{x}} of {{y}}',
@@ -114,7 +116,7 @@ describe('App Component', () => {
       component.gridOptions = { enableTranslate: true } as GridOption;
       fixture.detectChanges();
 
-      const elm = document.querySelector('.slick-pagination');
+      const elm = document.querySelector('.slick-pagination') as HTMLDivElement;
       const pageInfoFromTo = fixture.debugElement.query(By.css('.page-info-from-to')).nativeElement;
       const pageInfoTotalItems = fixture.debugElement.query(By.css('.page-info-total-items')).nativeElement;
 
@@ -132,15 +134,15 @@ describe('App Component', () => {
 
       expect(selectElement.value).toBe('10');
       expect(selectElement.selectedIndex).toBe(1);
-      const optionElement = selectElement.selectedOptions.item(0);
+      const optionElement = selectElement.selectedOptions.item(0) as HTMLOptionElement;
       expect(optionElement.value).toBe('10');
     });
 
     it('should create a the Slick-Pagination component in the DOM and expect different locale when changed', () => {
       translate.use('en');
       fixture.detectChanges();
 
-      const elm = document.querySelector('.slick-pagination');
+      const elm = document.querySelector('.slick-pagination') as HTMLDivElement;
       const pageInfoFromTo = fixture.debugElement.query(By.css('.page-info-from-to')).nativeElement;
       const pageInfoTotalItems = fixture.debugElement.query(By.css('.page-info-total-items')).nativeElement;
 

src/app/modules/angular-slickgrid/components/angular-slickgrid.component.html

@@ -9,9 +9,7 @@
   <!-- Custom Footer section under the grid -->
   <div *ngIf="showCustomFooter && customFooterOptions" class="slick-custom-footer" style="width: 100%;"
        [style.height]="customFooterOptions?.footerHeight || 20">
-    <div class="left-footer" [ngClass]="customFooterOptions.leftContainerClass">
-      {{customFooterOptions.leftFooterText}}
-    </div>
+    <div class="left-footer" [ngClass]="customFooterOptions.leftContainerClass">{{customFooterOptions.leftFooterText}}</div>
 
     <div class="right-footer metrics" [ngClass]="customFooterOptions.rightContainerClass"
          *ngIf="metrics && !customFooterOptions.hideMetrics">

src/app/modules/angular-slickgrid/components/angular-slickgrid.component.ts

@@ -1178,8 +1178,10 @@ export class AngularSlickgridComponent implements AfterViewInit, OnDestroy, OnIn
         customFooterOptions.metricTexts = customFooterOptions.metricTexts || {};
         customFooterOptions.metricTexts.lastUpdate = customFooterOptions.metricTexts.lastUpdate || this.locales && this.locales.TEXT_LAST_UPDATE || 'TEXT_LAST_UPDATE';
         customFooterOptions.metricTexts.items = customFooterOptions.metricTexts.items || this.locales && this.locales.TEXT_ITEMS || 'TEXT_ITEMS';
+        customFooterOptions.metricTexts.itemsSelected = customFooterOptions.metricTexts.itemsSelected || this.locales && this.locales.TEXT_ITEMS_SELECTED || 'TEXT_ITEMS_SELECTED';
         customFooterOptions.metricTexts.of = customFooterOptions.metricTexts.of || this.locales && this.locales.TEXT_OF || 'TEXT_OF';
       }
+      this.registerOnSelectedRowsChangedWhenEnabled(this.gridOptions.customFooterOptions);
 
       // we will display the custom footer only when there's no Pagination
       if (!this.gridOptions.enablePagination && !this._isPaginationInitialized) {
@@ -1190,6 +1192,23 @@ export class AngularSlickgridComponent implements AfterViewInit, OnDestroy, OnIn
     }
   }
 
+  /**
+   * When user has row selections enabled and does not have any custom text shown on the left side footer,
+   * we will show the row selection count on the bottom left side of the footer (by subscribing to the SlickGrid `onSelectedRowsChanged` event).
+   * @param customFooterOptions
+   */
+  private registerOnSelectedRowsChangedWhenEnabled(customFooterOptions?: CustomFooterOption) {
+    const isRowSelectionEnabled = this.gridOptions.enableCheckboxSelector || this.gridOptions.enableRowSelection;
+    if (isRowSelectionEnabled && customFooterOptions && (!customFooterOptions.hideRowSelectionCount && !customFooterOptions.leftFooterText)) {
+      const selectedCountText = customFooterOptions.metricTexts?.itemsSelected ?? this.locales?.TEXT_ITEMS_SELECTED ?? 'TEXT_ITEMS_SELECTED';
+      customFooterOptions.leftFooterText = `0 ${selectedCountText}`;
+
+      this._eventHandler.subscribe(this.grid.onSelectedRowsChanged, (_e: any, args: { rows: number[]; previousSelectedRows: number[]; }) => {
+        customFooterOptions.leftFooterText = `${args.rows.length || 0} ${selectedCountText}`;
+      });
+    }
+  }
+
   private treeDataSortComparer(flatDataset: any[]): any[] {
     const dataViewIdIdentifier = this.gridOptions && this.gridOptions.datasetIdPropertyName || 'id';
     const treeDataOpt: TreeDataOption = this.gridOptions && this.gridOptions.treeDataOptions || { columnId: '' };

src/app/modules/angular-slickgrid/constants.ts

@@ -29,6 +29,7 @@ export class Constants {
     TEXT_HIDE_COLUMN: 'Hide Column',
     TEXT_ITEMS: 'items',
     TEXT_ITEMS_PER_PAGE: 'items per page',
+    TEXT_ITEMS_SELECTED: 'items selected',
     TEXT_OF: 'of',
     TEXT_OK: 'OK',
     TEXT_LAST_UPDATE: 'Last Update',

src/app/modules/angular-slickgrid/global-grid-options.ts

@@ -53,6 +53,7 @@ export const GlobalGridOptions: Partial<GridOption> = {
   },
   customFooterOptions: {
     dateFormat: 'yyyy-MM-dd, hh:mm aaaaa\'m\'',
+    hideRowSelectionCount: false,
     hideTotalItemCount: false,
     hideLastUpdateTimestamp: true,
     footerHeight: 20,
@@ -61,9 +62,11 @@ export const GlobalGridOptions: Partial<GridOption> = {
     metricSeparator: '|',
     metricTexts: {
       items: 'items',
-      of: 'of',
       itemsKey: 'ITEMS',
+      of: 'of',
       ofKey: 'OF',
+      itemsSelected: 'items selected',
+      itemsSelectedKey: 'ITEMS_SELECTED'
     }
   },
   dataView: {

src/app/modules/angular-slickgrid/models/customFooterOption.interface.ts

@@ -1,3 +1,5 @@
+import { MetricTexts } from './metricTexts.interface';
+
 export interface CustomFooterOption {
   /** Optionally pass some text to be displayed on the left side (in the "left-footer" css class) */
   leftFooterText?: string;
@@ -11,6 +13,12 @@ export interface CustomFooterOption {
   /** Defaults to 20, height of the Custom Footer in pixels (this is required and is used by the auto-resizer) */
   footerHeight?: number;
 
+  /**
+   * Defaults to false, which will hide the selected rows count on the bottom left of the footer.
+   * NOTE: if users defined a `leftFooterText`, then the selected rows count will NOT show up.
+   */
+  hideRowSelectionCount?: boolean;
+
   /** Defaults to false, do we want to hide the last update timestamp (endTime)? */
   hideLastUpdateTimestamp?: boolean;
 
@@ -27,27 +35,7 @@ export interface CustomFooterOption {
   metricSeparator?: string;
 
   /** Text shown in the custom footer on the far right for the metrics */
-  metricTexts?: {
-    /** Defaults to empty string, optionally pass a text (Last Update) to display before the metrics endTime timestamp. */
-    lastUpdate?: string;
-
-    /** Defaults to "items", word to display at the end of the metrics to represent the items (e.g. you could change it for "users" or anything else). */
-    items?: string;
-
-    /** Defaults to "of", text word separator to display between the filtered items count and the total unfiltered items count (e.g.: "10 of 100 items"). */
-    of?: string;
-
-    // -- Translation Keys --//
-
-    /** Defaults to "ITEMS", translation key used for the word displayed at the end of the metrics to represent the items (e.g. you could change it for "users" or anything else). */
-    itemsKey?: string;
-
-    /** Defaults to empty string, optionally pass a translation key (internally we use "LAST_UPDATE") to display before the metrics endTime timestamp. */
-    lastUpdateKey?: string;
-
-    /** Defaults to "OF", translation key used for the to display between the filtered items count and the total unfiltered items count. */
-    ofKey?: string;
-  };
+  metricTexts?: MetricTexts;
 
   /** CSS class used for the right container */
   rightContainerClass?: string;

src/app/modules/angular-slickgrid/models/index.ts

@@ -116,6 +116,7 @@ export * from './menuItem.interface';
 export * from './menuOptionItem.interface';
 export * from './menuOptionItemCallbackArgs.interface';
 export * from './metrics.interface';
+export * from './metricTexts.interface';
 export * from './multiColumnSort.interface';
 export * from './multipleSelectOption.interface';
 export * from './odataOption.interface';

src/app/modules/angular-slickgrid/models/locale.interface.ts

@@ -80,6 +80,9 @@ export interface Locale {
   /** Text "items per page" displayed in the Pagination (when enabled) */
   TEXT_ITEMS_PER_PAGE?: string;
 
+  /** Text "Records Selected" displayed in the Custom Footer */
+  TEXT_ITEMS_SELECTED?: string;
+
   /** Text "Last Update" displayed in the Footer (when enabled) */
   TEXT_LAST_UPDATE?: string;
 

src/app/modules/angular-slickgrid/models/metricTexts.interface.ts

@@ -0,0 +1,29 @@
+export type MetricTexts = {
+  /** Defaults to empty string, optionally pass a text (Last Update) to display before the metrics endTime timestamp. */
+  lastUpdate?: string;
+
+  /** Defaults to "items", word to display at the end of the metrics to represent the items (e.g. you could change it for "users" or anything else). */
+  items?: string;
+
+  /** Defaults to "of", text word separator to display between the filtered items count and the total unfiltered items count (e.g.: "10 of 100 items"). */
+  of?: string;
+
+  /** Defaults to "records selected", text word that is associated to the row selection count. */
+  itemsSelected?: string;
+
+  // --
+  // Translation Keys
+  // ------------------
+
+  /** Defaults to "ITEMS", translation key used for the word displayed at the end of the metrics to represent the items (e.g. you could change it for "users" or anything else). */
+  itemsKey?: string;
+
+  /** Defaults to empty string, optionally pass a translation key (internally we use "LAST_UPDATE") to display before the metrics endTime timestamp. */
+  lastUpdateKey?: string;
+
+  /** Defaults to "OF", translation key used for the to display between the filtered items count and the total unfiltered items count. */
+  ofKey?: string;
+
+  /** Defaults to "ITEMS_SELECTED", text word that is associated to the row selection count. */
+  itemsSelectedKey?: string;
+};

src/app/modules/angular-slickgrid/services/resizer.service.ts

@@ -115,7 +115,7 @@ export class ResizerService {
 
     // optionally show a custom footer with the data metrics (dataset length and last updated timestamp)
     if (bottomPadding && gridOptions.showCustomFooter) {
-      bottomPadding += gridOptions.customFooterOptions && gridOptions.customFooterOptions.footerHeight || DATAGRID_FOOTER_HEIGHT;
+      bottomPadding += gridOptions?.customFooterOptions?.footerHeight ?? DATAGRID_FOOTER_HEIGHT;
     }
 
     let gridHeight = 0;

src/assets/i18n/en.json

@@ -30,6 +30,7 @@
   "IN_COLLECTION_SEPERATED_BY_COMMA": "Search items in a collection, must be separated by a comma (a,b)",
   "ITEMS": "items",
   "ITEMS_PER_PAGE": "items per page",
+  "ITEMS_SELECTED": "items selected",
   "LAST_UPDATE": "Last Update",
   "LESS_THAN": "Less than",
   "LESS_THAN_OR_EQUAL_TO": "Less than or equal to",

src/assets/i18n/fr.json

@@ -30,6 +30,7 @@
   "INVALID_FLOAT": "Le nombre doit être valide et avoir un maximum de {{maxDecimal}} décimales.",
   "ITEMS": "éléments",
   "ITEMS_PER_PAGE": "éléments par page",
+  "ITEMS_SELECTED": "éléments sélectionnés",
   "LAST_UPDATE": "Dernière mise à jour",
   "LESS_THAN": "Plus petit que",
   "LESS_THAN_OR_EQUAL_TO": "Plus petit ou égal à",