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import {Directive, Input, ElementRef} from '@angular/core';
import * as PerfectScrollbar from 'perfect-scrollbar';
interface IPerfectScrollbarOptions {
wheelSpeed?: number;
wheelPropagation?: boolean;
minScrollbarLength?: number;
useBothWheelAxes?: boolean;
useKeyboard?: boolean;
suppressScrollX?: boolean;
suppressScrollY?: boolean;
scrollXMarginOffset?: number;
scrollYMarginOffset?: number;
includePadding?: boolean;
}
@Directive({
selector: '[perfectScrollbar]'
})
export class PerfectScrollbarDirective {
@Input() public perfectScrollbarOptions: IPerfectScrollbarOptions;
private psOptions: IPerfectScrollbarOptions;
private updatingPS: boolean;
constructor(public elemRef:ElementRef) {
console.log('PSbar: Constructor');
this.psOptions = Object.assign({}, this.perfectScrollbarOptions);
this.updatingPS = false;
}
public ngOnInit() {
console.log('PSbar: Initializing');
PerfectScrollbar.initialize(this.elemRef.nativeElement, this.psOptions);
}
public ngAfterContentChecked() {
// update perfect-scrollbar after content is checked (updated) - bounced
if (!this.updatingPS) {
this.updatingPS = true;
setTimeout(() => {
this.updatingPS = false;
PerfectScrollbar.update(this.elemRef.nativeElement);
}, 100);
}
}
public ngOnDestroy() {
PerfectScrollbar.destroy(this.elemRef.nativeElement);
}
}
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