82 lines
2.3 KiB
TypeScript
82 lines
2.3 KiB
TypeScript
// (C) Copyright 2015 Moodle Pty Ltd.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Based on https://medium.com/madewithply/ionic-4-long-press-gestures-96cf1e44098b
|
|
|
|
import { Directive, ElementRef, OnInit, OnDestroy, Output, EventEmitter } from '@angular/core';
|
|
import { Gesture } from '@ionic/angular';
|
|
import { GestureController } from '@singletons';
|
|
/**
|
|
* Directive to add long press actions to html elements.
|
|
*/
|
|
@Directive({
|
|
selector: '[longPress]',
|
|
})
|
|
export class CoreLongPressDirective implements OnInit, OnDestroy {
|
|
|
|
readonly HOLD_DURATION = 500;
|
|
|
|
element: HTMLElement;
|
|
pressGesture?: Gesture;
|
|
timeout?: number;
|
|
|
|
@Output() longPress = new EventEmitter();
|
|
|
|
constructor(el: ElementRef) {
|
|
this.element = el.nativeElement;
|
|
this.element.setAttribute('tappable', '');
|
|
}
|
|
|
|
/**
|
|
* Initialize gesture listening.
|
|
*/
|
|
ngOnInit(): void {
|
|
this.pressGesture = GestureController.create({
|
|
el: this.element,
|
|
threshold: 0,
|
|
disableScroll: true,
|
|
gestureName: 'longpress',
|
|
onStart: (event) => {
|
|
this.timeout = window.setTimeout(() => {
|
|
this.longPress.emit(event);
|
|
|
|
delete this.timeout;
|
|
}, this.HOLD_DURATION);
|
|
},
|
|
onMove: () => this.clearTimeout(),
|
|
onEnd: () => this.clearTimeout(),
|
|
}, true);
|
|
|
|
this.pressGesture.enable();
|
|
}
|
|
|
|
/**
|
|
* Destroy gesture listening.
|
|
*/
|
|
ngOnDestroy(): void {
|
|
this.pressGesture?.destroy();
|
|
this.clearTimeout();
|
|
}
|
|
|
|
protected clearTimeout(): void {
|
|
if (!this.timeout) {
|
|
return;
|
|
}
|
|
|
|
clearTimeout(this.timeout);
|
|
delete this.timeout;
|
|
}
|
|
|
|
}
|