Say you need to increment something quickly while pushing a button. Or something. This directive intends to build upon the existing Hammer.JS press
event that Ionic uses for long pressing, by giving you interval emission.
This plugin should be compatible with Ionic and Angular 7 . It was tested with Ionic 4.11.5 and Angular 8.2.14.
npm install --save ionic-long-press
npm install --save hammerjs @types/hammerjs
// in src/main.ts.
import 'hammerjs';
Create an IonicGestureConfig.ts file in your utils folder and include this:
import { Injectable } from '@angular/core';
import { HammerGestureConfig } from '@angular/platform-browser';
/**
* @hidden
* This class overrides the default Angular gesture config.
*/
@Injectable()
export class IonicGestureConfig extends HammerGestureConfig {
buildHammer(element: HTMLElement) {
const mc = new (window as any).Hammer(element);
if (window) {
for (const eventName in this.overrides) {
if (eventName) {
mc.get(eventName).set(this.overrides[eventName])
}
}
}
return mc;
}
}
// in app.module.ts
import { IonicGestureConfig } from '../utils/IonicGestureConfig'
Add to provider:
@NgModule({
imports: [
...
],
declarations: [
...,
],
providers: [{provide: HAMMER_GESTURE_CONFIG, useClass: IonicGestureConfig}],
})
export class MyModule {
}
The directive should work on any HTML element.
Import the module:
import { LongPressModule } from 'ionic-long-press';
@NgModule({
imports: [
...
LongPressModule,
...
]
})
And use in your template:
<button ion-button ion-long-press [interval]="400" (pressed)="pressed()" (longPressed)="active()" (pressEnded)="released()"></button>
Item | Description |
---|---|
ion-long-press |
Directive to include the press event outputs. |
[interval] |
Number. Allows you to set the interval at which the longPressed event will fire. Default 500 . |
(pressed) |
Event fired when the element is initially pressed. |
(longPressed) |
Event fired on the specified interval when the element is being held. |
(pressEnded) |
Event fired when the element is released. |
I have instated a 40ms interval limit to prevent poor performance. I recommend a longer interval for heavy computations. If you need this limit lowered, please open an issue explaining your use case.
This plugin was originally developed by Wilson Hobbs in July 2017 with contributions from the open source community. Original source code is available for free on GitHub: https://github.com/wbhob/ionic-long-press