Merge pull request #4410 from tsiegleauq/more-swipe-gestures

Add swipe gestures into motion detail

client/src/app/base.component.ts

@@ -17,6 +17,16 @@ export abstract class BaseComponent {
      */
     private titleSuffix = ' - OpenSlides';
 
+    /**
+     * Holds the coordinates where a swipe gesture was used
+     */
+    protected swipeCoord?: [number, number];
+
+    /**
+     * Holds the time when the user was swiping
+     */
+    protected swipeTime?: number;
+
     /**
      * Settings for the TinyMCE editor selector
      */

client/src/app/site/base/base-view.ts

@@ -64,6 +64,12 @@ export abstract class BaseViewComponent extends BaseComponent implements OnDestr
         }
     }
 
+    /**
+     * To catch swipe gestures.
+     * Should be overwritten by children which need swipe gestures
+     */
+    protected swipe(e: TouchEvent, when: string): void {}
+
     /**
      * automatically dismisses the error snack bar and clears subscriptions
      * if the component is destroyed.

client/src/app/site/base/list-view-base.ts

@@ -60,7 +60,9 @@ export abstract class ListViewBaseComponent<V extends BaseViewModel, M extends B
      * Constructor for list view bases
      * @param titleService the title serivce
      * @param translate the translate service
-     * @param matSnackBar
+     * @param matSnackBar showing errors
+     * @param filterService filter
+     * @param sortService sorting
      */
     public constructor(
         titleService: Title,

client/src/app/site/motions/components/motion-detail/motion-detail.component.html

@@ -19,7 +19,7 @@
     </div>
 
     <!-- Back and forth buttons -->
-    <div *ngIf="!editMotion" class="extra-controls-slot on-transition-fade">
+    <div *ngIf="!editMotion && !vp.isMobile" class="extra-controls-slot on-transition-fade">
         <div *ngIf="previousMotion">
             <button mat-button (click)="navigateToMotion(previousMotion)">
                 <!-- possible icons:
@@ -103,7 +103,7 @@
     </mat-menu>
 </os-head-bar>
 
-<div class="content-container">
+<div class="content-container" (touchstart)="swipe($event, 'start')" (touchend)="swipe($event, 'end')">
     <!-- Title -->
     <div class="title on-transition-fade" *ngIf="motion && !editMotion">
         <div class="title-line">

client/src/app/site/motions/components/motion-detail/motion-detail.component.ts

@@ -28,6 +28,7 @@ import {
 } from '../motion-change-recommendation/motion-change-recommendation.component';
 import { MotionPdfExportService } from '../../services/motion-pdf-export.service';
 import { MotionRepositoryService } from 'app/core/repositories/motions/motion-repository.service';
+
 import { NotifyService } from 'app/core/core-services/notify.service';
 import { OperatorService } from 'app/core/core-services/operator.service';
 import { PersonalNoteContent } from 'app/shared/models/users/personal-note';
@@ -50,7 +51,6 @@ import { ViewMotionNotificationEditMotion, TypeOfNotificationViewMotion } from '
 import { ViewStatuteParagraph } from '../../models/view-statute-paragraph';
 import { ViewTag } from 'app/site/tags/models/view-tag';
 import { ViewUnifiedChange } from 'app/shared/models/motions/view-unified-change';
-
 import { Workflow } from 'app/shared/models/motions/workflow';
 
 /**
@@ -1079,11 +1079,13 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
      * @param motion target
      */
     public navigateToMotion(motion: ViewMotion): void {
+        if (motion) {
             this.router.navigate(['../' + motion.id], { relativeTo: this.route });
             // update the current motion
             this.motion = motion;
             this.setSurroundingMotions();
         }
+    }
 
     /**
      * Sets the previous and next motion. Sorts ascending by identifier, and
@@ -1458,4 +1460,34 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
 
         return StateCssClassMapping[this.motion.state.css_class] || '';
     }
+
+    public swipe(e: TouchEvent, when: string): void {
+        const coord: [number, number] = [e.changedTouches[0].pageX, e.changedTouches[0].pageY];
+        const time = new Date().getTime();
+        if (when === 'start') {
+            this.swipeCoord = coord;
+            this.swipeTime = time;
+        } else if (when === 'end') {
+            const direction = [coord[0] - this.swipeCoord[0], coord[1] - this.swipeCoord[1]];
+            const duration = time - this.swipeTime;
+
+            if (
+                duration < 1000 &&
+                Math.abs(direction[0]) > 30 && // swipe length to be detected
+                Math.abs(direction[0]) > Math.abs(direction[1] * 3) // 30° should be "horizontal enough"
+            ) {
+                if (
+                    direction[0] > 0 // swipe left to right
+                ) {
+                    this.navigateToMotion(this.previousMotion);
+                }
+
+                if (
+                    direction[0] < 0 // swipe left to right
+                ) {
+                    this.navigateToMotion(this.nextMotion);
+                }
+            }
+        }
+    }
 }

client/src/app/site/site.component.html

@@ -3,7 +3,13 @@
     <span>({{ getHistoryTimestamp() }})</span>
     <a (click)="timeTravel.resumeTime()" translate>Exit</a>
 </div>
-<mat-sidenav-container #siteContainer class="main-container" (backdropClick)="toggleSideNav()">
+<mat-sidenav-container
+    #siteContainer
+    class="main-container"
+    (backdropClick)="toggleSideNav()"
+    (touchstart)="swipe($event, 'start')"
+    (touchend)="swipe($event, 'end')"
+>
     <mat-sidenav
         #sideNav
         [mode]="vp.isMobile ? 'over' : 'side'"

client/src/app/site/site.component.ts

@@ -38,16 +38,6 @@ export class SiteComponent extends BaseComponent implements OnInit {
      */
     public isLoggedIn: boolean;
 
-    /**
-     * Holds the coordinates where a swipe gesture was used
-     */
-    private swipeCoord?: [number, number];
-
-    /**
-     * Holds the time when the user was swiping
-     */
-    private swipeTime?: number;
-
     /**
      * Holds the typed search query.
      */
@@ -171,18 +161,29 @@ export class SiteComponent extends BaseComponent implements OnInit {
         } else if (when === 'end') {
             const direction = [coord[0] - this.swipeCoord[0], coord[1] - this.swipeCoord[1]];
             const duration = time - this.swipeTime;
-
-            // definition of a "swipe right" gesture to move in the navigation.
-            // Required mobile view
-            // works anywhere on the screen, but could be limited
-            // to the left side of the screen easily if required)
             if (
                 duration < 1000 &&
                 Math.abs(direction[0]) > 30 && // swipe length to be detected
-                Math.abs(direction[0]) > Math.abs(direction[1] * 3) && // 30° should be "horizontal enough"
+                Math.abs(direction[0]) > Math.abs(direction[1] * 3) // 30° should be "horizontal enough"
-                direction[0] > 0 // swipe left to right
             ) {
-                this.toggleSideNav();
+                // definition of a "swipe right" gesture to move in the navigation
+                // only works in the far left edge of the screen
+                if (
+                    direction[0] > 0 && // swipe left to right
+                    this.swipeCoord[0] < 20
+                ) {
+                    this.sideNav.open();
+                }
+
+                // definition of a "swipe left" gesture to remove the navigation
+                // should only work in mobile mode to prevent unwanted closing of the nav
+                // works anywhere on the screen
+                if (
+                    direction[0] < 0 && // swipe left to right
+                    this.vp.isMobile
+                ) {
+                    this.sideNav.close();
+                }
             }
         }
     }