@c8y/ngx-components
Version:
Angular modules for Cumulocity IoT applications
48 lines • 2.27 kB
TypeScript
import { CdkVirtualScrollViewport, VirtualScrollStrategy } from '@angular/cdk/scrolling';
import { Observable } from 'rxjs';
export declare class VirtualScrollWindowStrategy implements VirtualScrollStrategy {
scrolledIndexChange: Observable<number>;
private destroy$;
private _viewport;
private _itemSizePx;
private _offsetSizePx;
private _minBufferPx;
private _maxBufferPx;
private readonly _scrolledIndexChange;
private readonly destroy;
constructor(itemSizePx: number, offsetSizePx: number, minBufferPx: number, maxBufferPx: number);
/**
* Attaches this scroll strategy to a viewport.
* @param viewport The viewport to attach this strategy to.
*/
attach(viewport: CdkVirtualScrollViewport): void;
/** Detaches this scroll strategy from the currently attached viewport. */
detach(): void;
/**
* Update the item size and buffer size.
* @param itemSize The size of the items in the virtually scrolling list.
* @param offsetSizePx The size of the offset (in pixels)..
* @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more
* @param maxBufferPx The amount of buffer (in pixels) to render when rendering more.
*/
updateItemAndBufferSize(itemSize: number, offsetSizePx: number, minBufferPx: number, maxBufferPx: number): void;
/** @docs-private Implemented as part of VirtualScrollStrategy. */
onContentScrolled(): void;
/** @docs-private Implemented as part of VirtualScrollStrategy. */
onDataLengthChanged(): void;
/** @docs-private Implemented as part of VirtualScrollStrategy. */
onContentRendered(): void;
/** @docs-private Implemented as part of VirtualScrollStrategy. */
onRenderedOffsetChanged(): void;
/**
* Scroll to the offset for the given index.
* @param index The index of the element to scroll to.
* @param behavior The ScrollBehavior to use when scrolling.
*/
scrollToIndex(index: number, behavior: ScrollBehavior): void;
/** Update the viewport's total content size. */
private _updateTotalContentSize;
/** Update the viewport's rendered range. */
private _updateRenderedRange;
}
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