Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | 1x 1x 1x 1x 1x 1x 12x 12x 12x 12x 11x 3x 10x | import {
CdkVirtualScrollViewport,
FixedSizeVirtualScrollStrategy,
VirtualScrollStrategy,
} from '@angular/cdk/scrolling';
import { AutoSizeVirtualScrollStrategy } from '@angular/cdk-experimental/scrolling';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
const MIN_BUFFER_PX = 200;
const MAX_BUFFER_PX = 400;
/**
* Delegating scroll strategy that switches between fixed-size and autosize
* based on configuration. Must be configured before the viewport's ngOnInit.
*/
@Injectable()
export class FlexibleVirtualScrollStrategy implements VirtualScrollStrategy {
private delegate: VirtualScrollStrategy = new AutoSizeVirtualScrollStrategy(MIN_BUFFER_PX, MAX_BUFFER_PX);
get scrolledIndexChange(): Observable<number> {
return this.delegate.scrolledIndexChange;
}
configure(itemSize: number | undefined): void {
Iif (itemSize !== undefined) {
this.delegate = new FixedSizeVirtualScrollStrategy(itemSize, MIN_BUFFER_PX, MAX_BUFFER_PX);
} else {
this.delegate = new AutoSizeVirtualScrollStrategy(MIN_BUFFER_PX, MAX_BUFFER_PX);
}
}
attach(viewport: CdkVirtualScrollViewport): void {
this.delegate.attach(viewport);
}
detach(): void {
this.delegate.detach();
}
onContentScrolled(): void {
this.delegate.onContentScrolled();
}
onDataLengthChanged(): void {
this.delegate.onDataLengthChanged();
}
onContentRendered(): void {
this.delegate.onContentRendered();
}
onRenderedOffsetChanged(): void {
this.delegate.onRenderedOffsetChanged();
}
scrollToIndex(index: number, behavior: ScrollBehavior): void {
this.delegate.scrollToIndex(index, behavior);
}
}
|