fix(core): unsubscribe every possible events

src/app/examples/custom-angularComponentEditor.ts

@@ -8,14 +8,15 @@ import {
   EditorValidator,
   EditorValidatorOutput,
   GridOption,
+  unsubscribeAllObservables,
 } from './../modules/angular-slickgrid';
 
 /*
  * An example of a 'detached' editor.
  * KeyDown events are also handled to provide handling for Tab, Shift-Tab, Esc and Ctrl-Enter.
  */
 export class CustomAngularComponentEditor implements Editor {
-  changeSubscriber: Subscription;
+  private _subscriptions: Subscription[] = [];
 
   /** Angular Component Reference */
   componentRef: ComponentRef<any>;
@@ -88,9 +89,9 @@ export class CustomAngularComponentEditor implements Editor {
       Object.assign(this.componentRef.instance, { collection: this.collection });
 
       // when our model (item object) changes, we'll call a save of the slickgrid editor
-      this.changeSubscriber = this.componentRef.instance.onItemChanged.subscribe((item) => {
-        this.save();
-      });
+      this._subscriptions.push(
+        this.componentRef.instance.onItemChanged.subscribe((item: any) => this.save())
+      );
     }
   }
 
@@ -131,8 +132,10 @@ export class CustomAngularComponentEditor implements Editor {
   destroy() {
     if (this.componentRef && this.componentRef.destroy) {
       this.componentRef.destroy();
-      this.changeSubscriber.unsubscribe();
     }
+
+    // also unsubscribe all Angular Subscriptions
+    this._subscriptions = unsubscribeAllObservables(this._subscriptions);
   }
 
   /** optional, implement a focus method on your Angular Component */

src/app/examples/custom-angularComponentFilter.ts

@@ -11,14 +11,15 @@ import {
   OperatorType,
   OperatorString,
   SearchTerm,
+  unsubscribeAllObservables,
 } from './../modules/angular-slickgrid';
 
 // using external non-typed js libraries
 declare const $: any;
 
 export class CustomAngularComponentFilter implements Filter {
   private _shouldTriggerQuery = true;
-  changeSubscriber: Subscription;
+  private _subscriptions: Subscription[] = [];
 
   /** Angular Component Reference */
   componentRef: ComponentRef<any>;
@@ -84,11 +85,13 @@ export class CustomAngularComponentFilter implements Filter {
         // but technically you can pass any values you wish to your Component
         Object.assign(componentOuput.componentRef.instance, { collection: this.collection });
 
-        this.changeSubscriber = componentOuput.componentRef.instance.onItemChanged.subscribe((item) => {
-          this.callback(undefined, { columnDef: this.columnDef, operator: this.operator, searchTerms: [item.id], shouldTriggerQuery: this._shouldTriggerQuery });
-          // reset flag for next use
-          this._shouldTriggerQuery = true;
-        });
+        this._subscriptions.push(
+          componentOuput.componentRef.instance.onItemChanged.subscribe((item) => {
+            this.callback(undefined, { columnDef: this.columnDef, operator: this.operator, searchTerms: [item.id], shouldTriggerQuery: this._shouldTriggerQuery });
+            // reset flag for next use
+            this._shouldTriggerQuery = true;
+          })
+        );
       });
     }
   }
@@ -107,8 +110,10 @@ export class CustomAngularComponentFilter implements Filter {
   destroy() {
     if (this.componentRef && this.componentRef.destroy) {
       this.componentRef.destroy();
-      this.changeSubscriber.unsubscribe();
     }
+
+    // also unsubscribe all Angular Subscriptions
+    this._subscriptions = unsubscribeAllObservables(this._subscriptions);
   }
 
   /** Set value(s) on the DOM element */

src/app/examples/grid-clientside.component.ts

@@ -1,4 +1,4 @@
-import { Component, OnInit } from '@angular/core';
+import { Component, OnInit, OnDestroy } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { TranslateService } from '@ngx-translate/core';
 import { CustomInputFilter } from './custom-inputFilter';
@@ -25,7 +25,7 @@ const URL_SAMPLE_COLLECTION_DATA = 'assets/data/collection_500_numbers.json';
 @Component({
   templateUrl: './grid-clientside.component.html'
 })
-export class GridClientSideComponent implements OnInit {
+export class GridClientSideComponent implements OnInit, OnDestroy {
   title = 'Example 4: Client Side Sort/Filter';
   subTitle = `
     Sort/Filter on client side only using SlickGrid DataView (<a href="https://github.com/ghiscoding/Angular-Slickgrid/wiki/Sorting" target="_blank">Wiki docs</a>)
@@ -280,4 +280,8 @@ export class GridClientSideComponent implements OnInit {
       });
     }
   }
+
+  ngOnDestroy() {
+    this.angularGrid.destroy();
+  }
 }

src/app/examples/grid-contextmenu.component.ts

@@ -1,5 +1,6 @@
-import { Component, OnInit, ViewEncapsulation } from '@angular/core';
+import { Component, OnInit, OnDestroy, ViewEncapsulation } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
+import { Subscription } from 'rxjs';
 import {
   AngularGridInstance,
   Column,
@@ -10,6 +11,7 @@ import {
   Formatter,
   Formatters,
   GridOption,
+  unsubscribeAllObservables,
 } from './../modules/angular-slickgrid';
 
 const actionFormatter: Formatter = (row, cell, value, columnDef, dataContext) => {
@@ -58,7 +60,7 @@ const taskTranslateFormatter: Formatter = (row: number, cell: number, value: any
   styleUrls: ['./grid-contextmenu.component.scss'],
   encapsulation: ViewEncapsulation.None
 })
-export class GridContextMenuComponent implements OnInit {
+export class GridContextMenuComponent implements OnInit, OnDestroy {
   title = 'Example 26: Cell Menu & Context Menu Plugins';
   subTitle = `Add Cell Menu and Context Menu
     <ul>
@@ -86,6 +88,7 @@ export class GridContextMenuComponent implements OnInit {
       </ol>
     </ul>`;
 
+  private subscriptions: Subscription[] = [];
   angularGrid: AngularGridInstance;
   columnDefinitions: Column[];
   gridOptions: GridOption;
@@ -116,6 +119,11 @@ export class GridContextMenuComponent implements OnInit {
     this.dataset = this.getData(1000);
   }
 
+  ngOnDestroy() {
+    // also unsubscribe all Angular Subscriptions
+    this.subscriptions = unsubscribeAllObservables(this.subscriptions);
+  }
+
   prepareGrid() {
     this.columnDefinitions = [
       { id: 'id', name: '#', field: 'id', maxWidth: 45, sortable: true, filterable: true },
@@ -453,8 +461,11 @@ export class GridContextMenuComponent implements OnInit {
 
   switchLanguage() {
     const nextLanguage = (this.selectedLanguage === 'en') ? 'fr' : 'en';
-    this.translate.use(nextLanguage).subscribe(() => {
-      this.selectedLanguage = nextLanguage;
-    });
+
+    this.subscriptions.push(
+      this.translate.use(nextLanguage).subscribe(() => {
+        this.selectedLanguage = nextLanguage;
+      })
+    );
   }
 }

src/app/examples/grid-frozen.component.ts

@@ -1,12 +1,12 @@
-import { Component, OnInit, ViewEncapsulation } from '@angular/core';
+import { Component, OnInit, OnDestroy, ViewEncapsulation } from '@angular/core';
 import { AngularGridInstance, Column, ColumnEditorDualInput, Editors, FieldType, formatNumber, Formatters, Filters, GridOption } from './../modules/angular-slickgrid';
 
 @Component({
   templateUrl: './grid-frozen.component.html',
   styleUrls: ['./grid-frozen.component.scss'],
   encapsulation: ViewEncapsulation.None,
 })
-export class GridFrozenComponent implements OnInit {
+export class GridFrozenComponent implements OnInit, OnDestroy {
   title = 'Example 20: Pinned (frozen) Columns/Rows';
   subTitle = `
   This example demonstrates the use of Pinned (aka frozen) Columns and/or Rows (<a href="https://github.com/ghiscoding/Angular-Slickgrid/wiki/Pinned-(aka-Frozen)-Columns-Rows" target="_blank">Wiki docs</a>)
@@ -31,6 +31,12 @@ export class GridFrozenComponent implements OnInit {
     this.prepareDataGrid();
   }
 
+  ngOnDestroy() {
+    // unsubscribe every SlickGrid subscribed event (or use the Slick.EventHandler)
+    this.gridObj.onMouseEnter.unsubscribe();
+    this.gridObj.onMouseLeave.unsubscribe();
+  }
+
   angularGridReady(angularGrid: AngularGridInstance) {
     this.angularGrid = angularGrid;
     this.gridObj = angularGrid.slickGrid;

src/app/examples/grid-graphql.component.ts

@@ -15,6 +15,7 @@ import {
   MultipleSelectOption,
   OperatorType,
   SortDirection,
+  unsubscribeAllObservables,
 } from './../modules/angular-slickgrid';
 import * as moment from 'moment-mini';
 import { Subscription } from 'rxjs';
@@ -43,6 +44,7 @@ export class GridGraphqlComponent implements OnInit, OnDestroy {
       <li>You can also preload a grid with certain "presets" like Filters / Sorters / Pagination <a href="https://github.com/ghiscoding/Angular-Slickgrid/wiki/Grid-State-&-Preset" target="_blank">Wiki - Grid Preset</a>
     </ul>
   `;
+  private subscriptions: Subscription[] = [];
   angularGrid: AngularGridInstance;
   columnDefinitions: Column[];
   gridOptions: GridOption;
@@ -54,7 +56,6 @@ export class GridGraphqlComponent implements OnInit, OnDestroy {
   status = { text: 'processing...', class: 'alert alert-danger' };
   isWithCursor = false;
   selectedLanguage: string;
-  gridStateSub: Subscription;
 
   constructor(private translate: TranslateService) {
     // always start with English for Cypress E2E tests to be consistent
@@ -64,7 +65,8 @@ export class GridGraphqlComponent implements OnInit, OnDestroy {
   }
 
   ngOnDestroy() {
-    this.gridStateSub.unsubscribe();
+    // also unsubscribe all Angular Subscriptions
+    this.subscriptions = unsubscribeAllObservables(this.subscriptions);
   }
 
   ngOnInit(): void {
@@ -208,7 +210,9 @@ export class GridGraphqlComponent implements OnInit, OnDestroy {
 
   angularGridReady(angularGrid: AngularGridInstance) {
     this.angularGrid = angularGrid;
-    this.gridStateSub = this.angularGrid.gridStateService.onGridStateChanged.subscribe((data) => console.log(data));
+    this.subscriptions.push(
+      this.angularGrid.gridStateService.onGridStateChanged.subscribe((data) => console.log(data))
+    );
   }
 
   displaySpinner(isProcessing) {
@@ -294,8 +298,10 @@ export class GridGraphqlComponent implements OnInit, OnDestroy {
 
   switchLanguage() {
     const nextLanguage = (this.selectedLanguage === 'en') ? 'fr' : 'en';
-    this.translate.use(nextLanguage).subscribe(() => {
-      this.selectedLanguage = nextLanguage;
-    });
+    this.subscriptions.push(
+      this.translate.use(nextLanguage).subscribe(() => {
+        this.selectedLanguage = nextLanguage;
+      })
+    );
   }
 }

src/app/examples/grid-headermenu.component.ts

@@ -1,13 +1,14 @@
-import { Component, OnInit, ViewEncapsulation } from '@angular/core';
-import { AngularGridInstance, Column, GridOption } from './../modules/angular-slickgrid';
+import { Component, OnDestroy, OnInit, ViewEncapsulation } from '@angular/core';
+import { AngularGridInstance, Column, GridOption, unsubscribeAllObservables } from './../modules/angular-slickgrid';
 import { TranslateService } from '@ngx-translate/core';
+import { Subscription } from 'rxjs';
 
 @Component({
   templateUrl: './grid-headermenu.component.html',
   styleUrls: ['./grid-headermenu.component.scss'],
   encapsulation: ViewEncapsulation.None,
 })
-export class GridHeaderMenuComponent implements OnInit {
+export class GridHeaderMenuComponent implements OnInit, OnDestroy {
   title = 'Example 8: Header Menu Plugin';
   subTitle = `
     This example demonstrates using the <b>Slick.Plugins.HeaderMenu</b> plugin to easily add menus to colum headers.<br/>
@@ -29,6 +30,7 @@ export class GridHeaderMenuComponent implements OnInit {
     </ul>
   `;
 
+  private subscriptions: Subscription[] = [];
   angularGrid: AngularGridInstance;
   columnDefinitions: Column[];
   gridOptions: GridOption;
@@ -39,6 +41,11 @@ export class GridHeaderMenuComponent implements OnInit {
     this.selectedLanguage = this.translate.getDefaultLang();
   }
 
+  ngOnDestroy() {
+    // also unsubscribe all Angular Subscriptions
+    this.subscriptions = unsubscribeAllObservables(this.subscriptions);
+  }
+
   ngOnInit(): void {
     this.columnDefinitions = [
       { id: 'title', name: 'Title', field: 'title', nameKey: 'TITLE' },
@@ -143,8 +150,10 @@ export class GridHeaderMenuComponent implements OnInit {
 
   switchLanguage() {
     const nextLanguage = (this.selectedLanguage === 'en') ? 'fr' : 'en';
-    this.translate.use(nextLanguage).subscribe(() => {
-      this.selectedLanguage = nextLanguage;
-    });
+    this.subscriptions.push(
+      this.translate.use(nextLanguage).subscribe(() => {
+        this.selectedLanguage = nextLanguage;
+      })
+    );
   }
 }

src/app/examples/grid-localization.component.ts

@@ -1,5 +1,6 @@
-import { Component, OnInit, Injectable } from '@angular/core';
+import { Component, OnDestroy, OnInit, Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
+import { Subscription } from 'rxjs';
 import {
   AngularGridInstance,
   Column,
@@ -10,7 +11,8 @@ import {
   Formatter,
   Formatters,
   GridOption,
-  GridStateChange
+  GridStateChange,
+  unsubscribeAllObservables
 } from './../modules/angular-slickgrid';
 
 const NB_ITEMS = 1500;
@@ -27,7 +29,7 @@ const taskTranslateFormatter: Formatter = (row: number, cell: number, value: any
   templateUrl: './grid-localization.component.html'
 })
 @Injectable()
-export class GridLocalizationComponent implements OnInit {
+export class GridLocalizationComponent implements OnInit, OnDestroy {
   title = 'Example 12: Localization (i18n)';
   subTitle = `Support multiple locales with the ngx-translate plugin, following these steps (<a href="https://github.com/ghiscoding/Angular-Slickgrid/wiki/Localization" target="_blank">Wiki docs</a>)
   <ol class="small">
@@ -55,6 +57,7 @@ export class GridLocalizationComponent implements OnInit {
     </ol>
   `;
 
+  private subscriptions: Subscription[] = [];
   angularGrid: AngularGridInstance;
   columnDefinitions: Column[];
   gridOptions: GridOption;
@@ -70,6 +73,11 @@ export class GridLocalizationComponent implements OnInit {
     this.selectedLanguage = defaultLang;
   }
 
+  ngOnDestroy() {
+    // also unsubscribe all Angular Subscriptions
+    this.subscriptions = unsubscribeAllObservables(this.subscriptions);
+  }
+
   ngOnInit(): void {
     this.columnDefinitions = [
       {
@@ -266,8 +274,10 @@ export class GridLocalizationComponent implements OnInit {
 
   switchLanguage() {
     const nextLanguage = (this.selectedLanguage === 'en') ? 'fr' : 'en';
-    this.translate.use(nextLanguage).subscribe(() => {
-      this.selectedLanguage = nextLanguage;
-    });
+    this.subscriptions.push(
+      this.translate.use(nextLanguage).subscribe(() => {
+        this.selectedLanguage = nextLanguage;
+      })
+    );
   }
 }