PullDownRefresh.ets
6.17 KB
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import promptAction from '@ohos.promptAction';
import { RefreshConstants as Const, RefreshState } from './RefreshConstants';
import { touchMoveLoadMore, touchUpLoadMore } from './PullUpLoadMore';
import { PageDTO, CompDTO } from 'wdBean';
import PageModel from '../viewmodel/PageModel';
import PageViewModel from '../viewmodel/PageViewModel';
import { DateTimeUtils } from 'wdKit';
export function listTouchEvent(pageModel: PageModel, event: TouchEvent) {
switch (event.type) {
case TouchType.Down:
pageModel.downY = event.touches[0].y;
pageModel.lastMoveY = event.touches[0].y;
break;
case TouchType.Move:
if ((pageModel.isRefreshing === true) || (pageModel.isLoading === true)) {
return;
}
let isDownPull = event.touches[0].y - pageModel.lastMoveY > 0;
if (((isDownPull === true) || (pageModel.isPullRefreshOperation === true)) && (pageModel.isCanLoadMore === false)) {
// Finger movement, processing pull-down refresh.
touchMovePullRefresh(pageModel, event);
} else {
// Finger movement, processing load more.
touchMoveLoadMore(pageModel, event);
}
pageModel.lastMoveY = event.touches[0].y;
break;
case TouchType.Cancel:
break;
case TouchType.Up:
if ((pageModel.isRefreshing === true) || (pageModel.isLoading === true)) {
return;
}
if ((pageModel.isPullRefreshOperation === true)) {
// Lift your finger and pull down to refresh.
touchUpPullRefresh(pageModel);
} else {
// Fingers up, handle loading more.
touchUpLoadMore(pageModel);
}
break;
default:
break;
}
}
export function touchMovePullRefresh(pageModel: PageModel, event: TouchEvent) {
if (pageModel.startIndex === 0) {
pageModel.isPullRefreshOperation = true;
let height = vp2px(pageModel.pullDownRefreshHeight);
pageModel.offsetY = event.touches[0].y - pageModel.downY;
// The sliding offset is greater than the pull-down refresh layout height, and the refresh condition is met.
if (pageModel.offsetY >= height) {
pullRefreshState(pageModel, RefreshState.Release);
pageModel.offsetY = height + pageModel.offsetY * Const.Y_OFF_SET_COEFFICIENT;
} else {
pullRefreshState(pageModel, RefreshState.DropDown);
}
if (pageModel.offsetY < 0) {
pageModel.offsetY = 0;
pageModel.isPullRefreshOperation = false;
}
}
}
export function touchUpPullRefresh(pageModel: PageModel) {
if (pageModel.isCanRefresh === true) {
pageModel.offsetY = vp2px(pageModel.pullDownRefreshHeight);
pullRefreshState(pageModel, RefreshState.Refreshing);
pageModel.currentPage = 1;
setTimeout(() => {
let self: PageModel = pageModel;
PageViewModel.getPageData(self.pageId, self.groupId, self.channelId, self.currentPage, self.pageSize, getContext())
.then((data: PageDTO) => {
self.timestamp = DateTimeUtils.getTimeStamp().toString()
if (data == null || data.compList == null || data.compList.length == 0) {
self.hasMore = false;
} else {
if (data.compList.length == self.pageSize) {
self.currentPage++;
self.hasMore = true;
} else {
self.hasMore = false;
}
// 刷新，替换所有数据
self.compList.replaceAll(...data.compList)
PageViewModel.getInteractData(data.compList).then((data: CompDTO[]) => {
// 刷新，替换所有数据
self.compList.replaceAll(...data)
self.timestamp = DateTimeUtils.getTimeStamp().toString()
})
}
closeRefresh(self, true);
}).catch((err: string | Resource) => {
promptAction.showToast({ message: err });
closeRefresh(self, false);
});
}, Const.DELAY_TIME);
} else {
closeRefresh(pageModel, false);
}
}
export function pullRefreshState(pageModel: PageModel, state: number) {
switch (state) {
case RefreshState.DropDown:
pageModel.pullDownRefreshText = $r('app.string.pull_down_refresh_text');
pageModel.pullDownRefreshImage = $r('app.media.ic_pull_down_refresh');
pageModel.isCanRefresh = false;
pageModel.isRefreshing = false;
pageModel.isVisiblePullDown = true;
break;
case RefreshState.Release:
pageModel.pullDownRefreshText = $r('app.string.release_refresh_text');
pageModel.pullDownRefreshImage = $r('app.media.ic_pull_up_refresh');
pageModel.isCanRefresh = true;
pageModel.isRefreshing = false;
break;
case RefreshState.Refreshing:
pageModel.offsetY = vp2px(pageModel.pullDownRefreshHeight);
pageModel.pullDownRefreshText = $r('app.string.refreshing_text');
pageModel.pullDownRefreshImage = $r('app.media.ic_pull_up_load');
pageModel.isCanRefresh = true;
pageModel.isRefreshing = true;
break;
case RefreshState.Success:
pageModel.pullDownRefreshText = $r('app.string.refresh_success_text');
pageModel.pullDownRefreshImage = $r('app.media.ic_succeed_refresh');
pageModel.isCanRefresh = true;
pageModel.isRefreshing = true;
break;
case RefreshState.Fail:
pageModel.pullDownRefreshText = $r('app.string.refresh_fail_text');
pageModel.pullDownRefreshImage = $r('app.media.ic_fail_refresh');
pageModel.isCanRefresh = true;
pageModel.isRefreshing = true;
break;
default:
break;
}
}
export function closeRefresh(pageModel: PageModel, isRefreshSuccess: boolean) {
let self = pageModel;
setTimeout(() => {
let delay = Const.RefreshConstant_DELAY_PULL_DOWN_REFRESH;
if (self.isCanRefresh === true) {
pullRefreshState(pageModel, isRefreshSuccess ? RefreshState.Success : RefreshState.Fail);
delay = Const.RefreshConstant_DELAY_SHRINK_ANIMATION_TIME;
}
animateTo({
duration: Const.RefreshConstant_CLOSE_PULL_DOWN_REFRESH_TIME,
delay: delay,
onFinish: () => {
pullRefreshState(pageModel, RefreshState.DropDown);
self.isVisiblePullDown = false;
self.isPullRefreshOperation = false;
}
}, () => {
self.offsetY = 0;
})
}, self.isCanRefresh ? Const.DELAY_ANIMATION_DURATION : 0);
}