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Split GridScrollbar into separate component
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| import {GridModel} from '@xh/hoist/cmp/grid'; | ||
| import {div} from '@xh/hoist/cmp/layout'; | ||
| import {hoistCmp, HoistModel, HoistProps, useLocalModel} from '@xh/hoist/core'; | ||
| import {makeObservable} from '@xh/hoist/mobx'; | ||
| import {observeResize} from '@xh/hoist/utils/js'; | ||
| import {sumBy} from 'lodash'; | ||
| import {action, observable} from 'mobx'; | ||
| import {createRef, RefObject} from 'react'; | ||
|
|
||
| export interface GridScrollbarProps extends HoistProps<GridModel> { | ||
| viewRef: RefObject<HTMLElement>; | ||
| } | ||
|
|
||
| export const gridScrollbar = hoistCmp.factory<GridScrollbarProps>({ | ||
| className: 'xh-grid__grid-scrollbar', | ||
| render({className}) { | ||
| const impl = useLocalModel(GridScrollbarModel), | ||
| {scrollerRef, viewportWidth, visibleColumnWidth, SCROLLBAR_SIZE} = impl; | ||
|
|
||
| return div({ | ||
| className, | ||
| omit: viewportWidth > visibleColumnWidth, | ||
| item: div({ | ||
| className: `${className}__filler`, | ||
| style: { | ||
| height: SCROLLBAR_SIZE, | ||
| width: visibleColumnWidth | ||
| } | ||
| }), | ||
| onScroll: e => { | ||
| impl.scrollViewport((e.target as HTMLDivElement).scrollLeft); | ||
| }, | ||
| ref: scrollerRef, | ||
| style: { | ||
| height: SCROLLBAR_SIZE, | ||
| overflowX: 'auto', | ||
| overflowY: 'hidden' | ||
| } | ||
| }); | ||
| } | ||
| }); | ||
|
|
||
| class GridScrollbarModel extends HoistModel { | ||
| readonly SCROLLBAR_SIZE = 10; | ||
| readonly scrollerRef = createRef<HTMLDivElement>(); | ||
|
|
||
| @observable viewportWidth: number; | ||
| @observable private isVerticalScrollbarVisible = false; | ||
|
|
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| private viewportResizeObserver: ResizeObserver; | ||
|
|
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| get visibleColumnWidth(): number { | ||
| const {model, SCROLLBAR_SIZE} = this; | ||
| return ( | ||
| sumBy(model.columnState, it => | ||
| it.hidden ? 0 : it.width ?? model.getColumn(it.colId).minWidth ?? 0 | ||
| ) + (this.isVerticalScrollbarVisible ? SCROLLBAR_SIZE : 0) | ||
| ); | ||
| } | ||
|
|
||
| private get agViewport(): HTMLDivElement { | ||
| return this.viewRef.current.querySelector('.ag-center-cols-viewport'); | ||
| } | ||
|
|
||
| private get agVerticalScrollContainer(): HTMLDivElement { | ||
| return this.viewRef.current.querySelector('.ag-body-vertical-scroll-container'); | ||
| } | ||
|
|
||
| private get model(): GridModel { | ||
| return this.componentProps.model as GridModel; | ||
| } | ||
|
|
||
| private get viewRef(): RefObject<HTMLElement> { | ||
| return this.componentProps.viewRef; | ||
| } | ||
|
|
||
| constructor() { | ||
| super(); | ||
| makeObservable(this); | ||
| } | ||
|
|
||
| scrollScroller(left: number) { | ||
| this.scrollerRef.current.scrollLeft = left; | ||
| } | ||
|
|
||
| scrollViewport(left: number) { | ||
| this.agViewport.scrollLeft = left; | ||
| } | ||
|
|
||
| override afterLinked() { | ||
| this.addReaction({ | ||
| when: () => !!this.viewRef.current && this.model.isReady, | ||
| run: () => { | ||
| const {agViewport, viewportResizeObserver} = this; | ||
| this.viewportWidth = agViewport.clientWidth; | ||
| agViewport.addEventListener('scroll', e => | ||
| this.scrollScroller((e.target as HTMLDivElement).scrollLeft) | ||
| ); | ||
| viewportResizeObserver?.disconnect(); | ||
| this.viewportResizeObserver = observeResize( | ||
| rect => this.onViewResized(rect), | ||
| agViewport, | ||
| {debounce: 100} | ||
| ); | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| override destroy() { | ||
| super.destroy(); | ||
| this.viewportResizeObserver?.disconnect(); | ||
| } | ||
|
|
||
| @action | ||
| private onViewResized({width}: DOMRect) { | ||
| this.viewportWidth = width; | ||
| this.isVerticalScrollbarVisible = !!this.agVerticalScrollContainer.clientHeight; | ||
| } | ||
| } |