fix(view):更换虚拟列表支持库,以解决缩放存在的问题。

This commit is contained in:
徐涛
2023-03-21 13:49:24 +08:00
parent 925b055318
commit 3e6b89ab39
4 changed files with 51 additions and 55 deletions

View File

@@ -1,35 +1,34 @@
//@ts-nocheck
import EventEmitter from 'events';
import { indexOf, isEmpty, length, map, mergeLeft, pluck, range } from 'ramda';
import { indexOf, isEmpty, length, map, pluck, range } from 'ramda';
import { FC, useCallback, useContext, useEffect, useMemo, useRef } from 'react';
import { VariableSizeList } from 'react-window';
import { ListRange, Virtuoso, VirtuosoHandle } from 'react-virtuoso';
import { EventBusContext } from '../EventBus';
import { sortedFilesSelector, useFileListStore } from '../states/files';
import { useZoomState } from '../states/zoom';
export const ContinuationView: FC = () => {
const files = useFileListStore(sortedFilesSelector());
const zoom = useZoomState.use.currentZoom();
const viewHeight = useZoomState.use.viewHeight();
const { currentZoom: zoom, viewWidth, viewHeight } = useZoomState();
const updateActives = useFileListStore.use.updateActiveFiles();
const fileCount = useMemo(() => length(files), [files]);
const ebus = useContext<EventEmitter>(EventBusContext);
const virtualListRef = useRef<VariableSizeList | null>();
const virtualListRef = useRef<VirtuosoHandle | null>(null);
const handleOnRenderAction = useCallback(
({ visibleStartIndex, visibleStopIndex }) => {
updateActives(map(i => files[i].filename, range(visibleStartIndex, visibleStopIndex + 1)));
({ startIndex, endIndex }: ListRange) => {
updateActives(map(i => files[i].filename, range(startIndex, endIndex + 1)));
},
[files]
);
const fileHeights = useMemo(() => map(item => item.height * (zoom / 100), files), [files, zoom]);
const maxImageWidth = useMemo(() => viewWidth * (zoom / 100), [viewWidth, zoom]);
useEffect(() => {
ebus?.addListener('navigate_offset', ({ filename }) => {
let index = indexOf(filename, pluck('filename', files));
virtualListRef.current?.scrollToItem(index);
virtualListRef.current?.scrollToIndex({ index, align: 'start', behavior: 'smooth' });
});
ebus?.addListener('reset_views', () => {
virtualListRef.current?.scrollTo(0);
virtualListRef.current?.scrollTo({ top: 0 });
});
return () => {
ebus?.removeAllListeners('navigate_offset');
@@ -46,29 +45,27 @@ export const ContinuationView: FC = () => {
}}
>
{!isEmpty(files) && (
<VariableSizeList
itemData={files}
itemCount={fileCount}
itemSize={index => fileHeights[index]}
itemKey={index => files[index].id}
height={viewHeight}
width="100%"
<Virtuoso
style={{ height: viewHeight }}
ref={virtualListRef}
onItemsRendered={handleOnRenderAction}
>
{({ index, style, data }) => (
totalCount={fileCount}
computeItemKey={index => files[index].id}
rangeChanged={handleOnRenderAction}
itemContent={index => (
<div
style={mergeLeft(style, {
style={{
display: 'flex',
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'flex-start'
})}
alignItems: 'flex-start',
width: '100%',
height: files[index].height * (maxImageWidth / files[index].width)
}}
>
<img src={data[index].path} style={{ width: data[index].width * (zoom / 100) }} />
<img src={files[index].path} style={{ width: maxImageWidth }} />
</div>
)}
</VariableSizeList>
/>
)}
</div>
);