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18xchat/assets/Scripts/Main/Common/ScrollViewList.ts
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2025-07-17 17:18:21 +08:00
/******************************************
* @author kL <klk0@qq.com>
* @date 2020/12/9
* @doc 列表组件.
* @end
******************************************/
const { ccclass, property, disallowMultiple, menu, executionOrder, requireComponent } = _decorator;
import { Node, Component, Enum, tween, _decorator, EventHandler, Tween, ScrollView, Prefab, Layout, Vec2, Size, NodePool, isValid, instantiate, Vec3, Widget, UITransform, CCFloat, CCBoolean, CCInteger } from 'cc';
import { DEV } from 'cc/env';
import ScrollViewListItem from './ScrollviewListItem';
enum TemplateType {
NODE = 1,
PREFAB = 2,
}
enum SlideType {
NORMAL = 1,//普通
ADHERING = 2,//粘附模式，将强制关闭滚动惯性
PAGE = 3,//页面模式，将强制关闭滚动惯性
}
enum SelectedType {
NONE = 0,
SINGLE = 1,//单选
MULT = 2,//多选
}
@ccclass
@disallowMultiple()
@menu('花仙子控件/ScrollViewList')
@requireComponent(ScrollView)
//脚本生命周期回调的执行优先级。小于 0 的脚本将优先执行，大于 0 的脚本将最后执行。该优先级只对 onLoad, onEnable, start, update 和 lateUpdate 有效，对 onDisable 和 onDestroy 无效。
@executionOrder(-5000)
export default class HXZ_ScrollViewList extends Component {
//模板类型
@property({ type: Enum(TemplateType), tooltip: DEV ? '模板类型' : "模板类型", })
private templateType: TemplateType = TemplateType.NODE;
//模板Item（Node）
@property({
type: Node,
tooltip: DEV ? '模板Item' :'模板Item',
visible() { return this.templateType == TemplateType.NODE; }
})
tmpNode: Node = null!;
//模板Item（Prefab）
@property({
type: Prefab,
tooltip: DEV ? '模板Item' : '模板Item',
visible() { return this.templateType == TemplateType.PREFAB; }
})
tmpPrefab: Prefab = null!;
//滑动模式
@property({})
private _slideMode: SlideType = SlideType.NORMAL;
@property({
type: Enum(SlideType),
tooltip: DEV ? '滑动模式' : '滑动模式'
})
set slideMode(val: SlideType) {
this._slideMode = val;
}
get slideMode() {
return this._slideMode;
}
//翻页作用距离
@property({
type: CCFloat,
range: [0, 1, .1],
tooltip: DEV ? '翻页作用距离' : '翻页作用距离',
slide: true,
visible() { return this._slideMode == SlideType.PAGE; }
})
public pageDistance: number = .3;
//页面改变事件
@property({
type: EventHandler,
tooltip: DEV ? '页面改变事件' : '页面改变事件',
visible() { return this._slideMode == SlideType.PAGE; }
})
private pageChangeEvent: EventHandler = new EventHandler();
//是否为虚拟列表（动态列表）
@property({})
private _virtual: boolean = true;
@property({
type: CCBoolean,
tooltip: DEV ? '是否为虚拟列表（动态列表）' : '是否为虚拟列表（动态列表）'
})
set virtual(val: boolean) {
if (val != null)
this._virtual = val;
if (!DEV && this._numItems != 0) {
this._onScrolling();
}
}
get virtual() {
return this._virtual;
}
//是否为循环列表
@property({
tooltip: DEV ? '是否为循环列表' : '是否为循环列表',
visible() {
let val: boolean = /*this.virtual &&*/ this.slideMode == SlideType.NORMAL;
if (!val)
this.cyclic = false;
return val;
}
})
public cyclic: boolean = false;
//缺省居中
@property({
tooltip: DEV ? 'Item数量不足以填满Content时，是否居中显示Item（不支持Grid布局）' : 'Item数量不足以填满Content时，是否居中显示Item（不支持Grid布局）',
visible() { return this.virtual; }
})
public lackCenter: boolean = false;
//缺省可滑动
@property({
tooltip: DEV ? 'Item数量不足以填满Content时，是否可滑动' : 'Item数量不足以填满Content时，是否可滑动',
visible() {
let val: boolean = this.virtual && !this.lackCenter;
if (!val)
this.lackSlide = false;
return val;
}
})
public lackSlide: boolean = false;
//刷新频率
@property({ type: CCInteger })
private _updateRate: number = 0;
@property({
type: CCInteger,
range: [0, 6, 1],
tooltip: DEV ? '刷新频率（值越大刷新频率越低、性能越高）' : '刷新频率（值越大刷新频率越低、性能越高）',
slide: true,
})
set updateRate(val: number) {
if (val >= 0 && val <= 6) {
this._updateRate = val;
}
}
get updateRate() {
return this._updateRate;
}
//分帧渲染（每帧渲染的Item数量（<=0时关闭分帧渲染））
@property({
type: CCInteger,
range: [0, 12, 1],
tooltip: DEV ? '逐帧渲染时，每帧渲染的Item数量（<=0时关闭分帧渲染）' : '逐帧渲染时，每帧渲染的Item数量（<=0时关闭分帧渲染）',
slide: true,
})
public frameByFrameRenderNum: number = 0;
//渲染事件（渲染器）
@property({
type: EventHandler,
tooltip: DEV ? '渲染事件（渲染器）' : '渲染事件（渲染器）',
})
public renderEvent: EventHandler = new EventHandler();
//选择模式
@property({
type: Enum(SelectedType),
tooltip: DEV ? '选择模式' : '选择模式'
})
public selectedMode: SelectedType = SelectedType.NONE;
//触发选择事件
@property({
type: EventHandler,
tooltip: DEV ? '触发选择事件' : '触发选择事件',
visible() { return this.selectedMode > SelectedType.NONE; }
})
public selectedEvent: EventHandler = new EventHandler();
@property({
tooltip: DEV ? '是否重复响应单选事件' : '是否重复响应单选事件',
visible() { return this.selectedMode == SelectedType.SINGLE; }
})
public repeatEventSingle: boolean = false;
//当前选择id
private _selectedId: number = -1;
private _lastSelectedId!: number;
private multSelected!: number[];
set selectedId(val: number) {
let t: any = this;
let item: any;
switch (t.selectedMode) {
case SelectedType.SINGLE: {
if (!t.repeatEventSingle && val == t._selectedId)
return;
item = t.getItemByListId(val);
// if (!item && val >= 0)
// return;
let listItem: ScrollViewListItem;
if (t._selectedId >= 0)
t._lastSelectedId = t._selectedId;
else //如果＜0则取消选择，把_lastSelectedId也置空吧，如果以后有特殊需求再改吧。
t._lastSelectedId = null;
t._selectedId = val;
if (item) {
listItem = item.getComponent(ScrollViewListItem);
listItem.selected = true;
}
if (t._lastSelectedId >= 0 && t._lastSelectedId != t._selectedId) {
let lastItem: any = t.getItemByListId(t._lastSelectedId);
if (lastItem) {
lastItem.getComponent(ScrollViewListItem).selected = false;
}
}
if (t.selectedEvent) {
EventHandler.emitEvents([t.selectedEvent], item, val % this._actualNumItems, t._lastSelectedId == null ? null : (t._lastSelectedId % this._actualNumItems));
}
break;
}
case SelectedType.MULT: {
item = t.getItemByListId(val);
if (!item)
return;
let listItem = item.getComponent(ScrollViewListItem);
if (t._selectedId >= 0)
t._lastSelectedId = t._selectedId;
t._selectedId = val;
let bool: boolean = !listItem.selected;
listItem.selected = bool;
let sub: number = t.multSelected.indexOf(val);
if (bool && sub < 0) {
t.multSelected.push(val);
} else if (!bool && sub >= 0) {
t.multSelected.splice(sub, 1);
}
if (t.selectedEvent) {
EventHandler.emitEvents([t.selectedEvent], item, val % this._actualNumItems, t._lastSelectedId == null ? null : (t._lastSelectedId % this._actualNumItems), bool);
}
break;
}
}
}
get selectedId() {
return this._selectedId;
}
private _forceUpdate: boolean = false;
private _align!: number;
private _horizontalDir!: number;
private _verticalDir!: number;
private _startAxis!: number;
private _alignCalcType!: number;
public content!: Node;
private _contentUt!: UITransform;
private firstListId!: number;
public displayItemNum!: number;
private _updateDone: boolean = true;
private _updateCounter!: number;
public _actualNumItems!: number;
private _cyclicNum!: number;
private _cyclicPos1!: number;
private _cyclicPos2!: number;
//滚动开始时..
private canRefresh: boolean = false;
//列表数量
@property({
serializable: false
})
private _numItems: number = 0;
set numItems(val: number) {
let t = this;
if (!t.checkInited(false))
return;
if (val == null || val < 0) {
console.error('numItems set the wrong::', val);
return;
}
t._actualNumItems = t._numItems = val;
t._forceUpdate = true;
if (t._virtual) {
t._resizeContent();
if (t.cyclic) {
t._numItems = t._cyclicNum * t._numItems;
}
t._onScrolling();
if (!t.frameByFrameRenderNum && t.slideMode == SlideType.PAGE)
t.curPageNum = t.nearestListId;
} else {
if (t.cyclic) {
t._resizeContent();
t._numItems = t._cyclicNum * t._numItems;
}
let layout: Layout = t.content.getComponent(Layout)!;
if (layout) {
layout.enabled = true;
}
t._delRedundantItem();
t.firstListId = 0;
if (t.frameByFrameRenderNum > 0) {
//先渲染几个出来
let len: number = t.frameByFrameRenderNum > t._numItems ? t._numItems : t.frameByFrameRenderNum;
for (let n: number = 0; n < len; n++) {
t._createOrUpdateItem2(n);
}
if (t.frameByFrameRenderNum < t._numItems) {
t._updateCounter = t.frameByFrameRenderNum;
t._updateDone = false;
}
} else {
for (let n: number = 0; n < t._numItems; n++) {
t._createOrUpdateItem2(n);
}
t.displayItemNum = t._numItems;
}
}
}
get numItems() {
return this._actualNumItems;
}
private _inited: boolean = false;
private _scrollView!: ScrollView;
get scrollView() {
return this._scrollView;
}
private _layout!: Layout;
private _resizeMode!: number;
private _topGap!: number;
private _rightGap!: number;
private _bottomGap!: number;
private _leftGap!: number;
private _columnGap!: number;
private _lineGap!: number;
private _colLineNum!: number;
private _lastDisplayData!: number[];
public displayData!: any[];
private _pool!: NodePool;
private _itemTmp: any;
private _itemTmpUt!: UITransform;
private _needUpdateWidget: boolean = false;
private _itemSize!: Size;
private _sizeType!: boolean;
public _customSize: any;
private frameCount!: number;
private _aniDelRuning: boolean = false;
private _aniDelCB!: Function;
private _aniDelItem: any;
private _aniDelBeforePos!: Vec2;
private _aniDelBeforeScale!: number;
private viewTop!: number;
private viewRight!: number;
private viewBottom!: number;
private viewLeft!: number;
private _doneAfterUpdate: boolean = false;
private elasticTop!: number;
private elasticRight!: number;
private elasticBottom!: number;
private elasticLeft!: number;
private scrollToListId!: number;
private adhering: boolean = false;
private _adheringBarrier: boolean = false;
private nearestListId!: number;
public curPageNum: number = 0;
private _beganPos!: number;
private _scrollPos!: number;
private _curScrollIsTouch!: boolean;//当前滑动是否为手动
private _scrollToListId!: number;
private _scrollToEndTime!: number;
private _scrollToSo: any;
private _lack!: boolean;
private _allItemSize!: number;
private _allItemSizeNoEdge!: number;
private _scrollItem: any;//当前控制 ScrollView 滚动的 Item
private _thisNodeUt!: UITransform;
//----------------------------------------------------------------------------
onLoad() {
this._init();
}
onNodeDestroy() {
let t: any = this;
if (isValid(t._itemTmp))
t._itemTmp.destroy();
if (isValid(t.tmpNode))
t.tmpNode.destroy();
t._pool && t._pool.clear();
while (t._pool && t._pool.size()) {
let node = t._pool.get();
node.destroy();
}
}
onEnable() {
// if (!EDITOR)
this._registerEvent();
this._init();
// 处理重新显示后，有可能上一次的动画移除还未播放完毕，导致动画卡住的问题
if (this._aniDelRuning) {
this._aniDelRuning = false;
if (this._aniDelItem) {
if (this._aniDelBeforePos) {
this._aniDelItem.position = this._aniDelBeforePos;
delete this._aniDelBeforePos;
}
if (this._aniDelBeforeScale) {
this._aniDelItem.scale = this._aniDelBeforeScale;
delete this._aniDelBeforeScale;
}
delete this._aniDelItem;
}
if (this._aniDelCB) {
this._aniDelCB();
delete this._aniDelCB;
}
}
}
onDisable() {
// if (!EDITOR)
this._unregisterEvent();
}
//注册事件
_registerEvent() {
let t: any = this;
t.node.on(Node.EventType.TOUCH_START, t._onTouchStart, t);
t.node.on('touch-up', t._onTouchUp, t);
t.node.on(Node.EventType.TOUCH_CANCEL, t._onTouchCancelled, t);
t.node.on('scroll-began', t._onScrollBegan, t);
t.node.on('scroll-ended', t._onScrollEnded, t);
t.node.on('scrolling', t._onScrolling, t);
t.node.on(Node.EventType.SIZE_CHANGED, t._onSizeChanged, t);
}
//卸载事件
_unregisterEvent() {
let t: any = this;
t.node.off(Node.EventType.TOUCH_START, t._onTouchStart, t);
t.node.off('touch-up', t._onTouchUp, t);
t.node.off(Node.EventType.TOUCH_CANCEL, t._onTouchCancelled, t);
t.node.off('scroll-began', t._onScrollBegan, t);
t.node.off('scroll-ended', t._onScrollEnded, t);
t.node.off('scrolling', t._onScrolling, t);
t.node.off(Node.EventType.SIZE_CHANGED, t._onSizeChanged, t);
}
//初始化各种..
_init() {
let t: any = this;
if (t._inited)
return;
if (t.tmpPrefab == null && t.tmpNode == null) {{return;}}
t._thisNodeUt = t.node.getComponent(UITransform);
t._scrollView = t.node.getComponent(ScrollView);
t.content = t._scrollView.content;
t._contentUt = t.content.getComponent(UITransform);
if (!t.content) {
console.error(t.node.name + "'s ScrollView unset content!");
return;
}
t._layout = t.content.getComponent(Layout);
t._align = t._layout.type; //排列模式
t._resizeMode = t._layout.resizeMode; //自适应模式
t._startAxis = t._layout.startAxis;
t._topGap = t._layout.paddingTop; //顶边距
t._rightGap = t._layout.paddingRight; //右边距
t._bottomGap = t._layout.paddingBottom; //底边距
t._leftGap = t._layout.paddingLeft; //左边距
t._columnGap = t._layout.spacingX; //列距
t._lineGap = t._layout.spacingY; //行距
t._colLineNum; //列数或行数（非GRID模式则=1，表示单列或单行）;
t._verticalDir = t._layout.verticalDirection; //垂直排列子节点的方向
t._horizontalDir = t._layout.horizontalDirection; //水平排列子节点的方向
t.setTemplateItem(instantiate(t.templateType == TemplateType.PREFAB ? t.tmpPrefab : t.tmpNode));
// 特定的滑动模式处理
if (t._slideMode == SlideType.ADHERING || t._slideMode == SlideType.PAGE) {
t._scrollView.inertia = false;
t._scrollView._onMouseWheel = function () {
return;
};
}
if (!t.virtual) // lackCenter 仅支持 Virtual 模式
t.lackCenter = false;
t._lastDisplayData = []; //最后一次刷新的数据
t.displayData = []; //当前数据
t._pool = new NodePool(); //这是个池子..
t._forceUpdate = false; //是否强制更新
t._updateCounter = 0; //当前分帧渲染帧数
t._updateDone = true; //分帧渲染是否完成
t.curPageNum = 0; //当前页数
if (t.cyclic || 0) {
t._scrollView._processAutoScrolling = this._processAutoScrolling.bind(t);
t._scrollView._startBounceBackIfNeeded = function () {
return false;
}
}
switch (t._align) {
case Layout.Type.HORIZONTAL: {
switch (t._horizontalDir) {
case Layout.HorizontalDirection.LEFT_TO_RIGHT:
t._alignCalcType = 1;
break;
case Layout.HorizontalDirection.RIGHT_TO_LEFT:
t._alignCalcType = 2;
break;
}
break;
}
case Layout.Type.VERTICAL: {
switch (t._verticalDir) {
case Layout.VerticalDirection.TOP_TO_BOTTOM:
t._alignCalcType = 3;
break;
case Layout.VerticalDirection.BOTTOM_TO_TOP:
t._alignCalcType = 4;
break;
}
break;
}
case Layout.Type.GRID: {
switch (t._startAxis) {
case Layout.AxisDirection.HORIZONTAL:
switch (t._verticalDir) {
case Layout.VerticalDirection.TOP_TO_BOTTOM:
t._alignCalcType = 3;
break;
case Layout.VerticalDirection.BOTTOM_TO_TOP:
t._alignCalcType = 4;
break;
}
break;
case Layout.AxisDirection.VERTICAL:
switch (t._horizontalDir) {
case Layout.HorizontalDirection.LEFT_TO_RIGHT:
t._alignCalcType = 1;
break;
case Layout.HorizontalDirection.RIGHT_TO_LEFT:
t._alignCalcType = 2;
break;
}
break;
}
break;
}
}
// 清空 content
// t.content.children.forEach((child: Node) => {
// child.removeFromParent();
// if (child != t.tmpNode && child.isValid)
// child.destroy();
// });
t.content.removeAllChildren();
t._inited = true;
}
/**
* 为了实现循环列表，必须覆写cc.ScrollView的某些函数
* @param {Number} dt
*/
_processAutoScrolling(dt: number) {
// ------------- scroll-view 里定义的一些常量 -------------
const OUT_OF_BOUNDARY_BREAKING_FACTOR = 0.05;
const EPSILON = 1e-4;
const ZERO = new Vec3();
const quintEaseOut = (time: number) => {
time -= 1;
return (time * time * time * time * time + 1);
};
// ------------- scroll-view 里定义的一些常量 -------------
let sv: ScrollView = this._scrollView;
const isAutoScrollBrake = sv['_isNecessaryAutoScrollBrake']();
const brakingFactor = isAutoScrollBrake ? OUT_OF_BOUNDARY_BREAKING_FACTOR : 1;
sv['_autoScrollAccumulatedTime'] += dt * (1 / brakingFactor);
let percentage = Math.min(1, sv['_autoScrollAccumulatedTime'] / sv['_autoScrollTotalTime']);
if (sv['_autoScrollAttenuate']) {
percentage = quintEaseOut(percentage);
}
const clonedAutoScrollTargetDelta = sv['_autoScrollTargetDelta'].clone();
clonedAutoScrollTargetDelta.multiplyScalar(percentage);
const clonedAutoScrollStartPosition = sv['_autoScrollStartPosition'].clone();
clonedAutoScrollStartPosition.add(clonedAutoScrollTargetDelta);
let reachedEnd = Math.abs(percentage - 1) <= EPSILON;
const fireEvent = Math.abs(percentage - 1) <= sv['getScrollEndedEventTiming']();
if (fireEvent && !sv['_isScrollEndedWithThresholdEventFired']) {
sv['_dispatchEvent'](ScrollView.EventType.SCROLL_ENG_WITH_THRESHOLD);
sv['_isScrollEndedWithThresholdEventFired'] = true;
}
if (sv['elastic']) {
const brakeOffsetPosition = clonedAutoScrollStartPosition.clone();
brakeOffsetPosition.subtract(sv['_autoScrollBrakingStartPosition']);
if (isAutoScrollBrake) {
brakeOffsetPosition.multiplyScalar(brakingFactor);
}
clonedAutoScrollStartPosition.set(sv['_autoScrollBrakingStartPosition']);
clonedAutoScrollStartPosition.add(brakeOffsetPosition);
} else {
const moveDelta = clonedAutoScrollStartPosition.clone();
moveDelta.subtract(sv['_getContentPosition']());
const outOfBoundary = sv['_getHowMuchOutOfBoundary'](moveDelta);
if (!outOfBoundary.equals(ZERO, EPSILON)) {
clonedAutoScrollStartPosition.add(outOfBoundary);
reachedEnd = true;
}
}
if (reachedEnd) {
sv['_autoScrolling'] = false;
}
const deltaMove = new Vec3(clonedAutoScrollStartPosition);
deltaMove.subtract(sv['_getContentPosition']());
sv['_clampDelta'](deltaMove);
sv['_moveContent'](deltaMove, reachedEnd);
sv['_dispatchEvent'](ScrollView.EventType.SCROLLING);
if (!sv['_autoScrolling']) {
sv['_isBouncing'] = false;
sv['_scrolling'] = false;
sv['_dispatchEvent'](ScrollView.EventType.SCROLL_ENDED);
}
}
//设置模板Item
setTemplateItem(item: any) {
if (!item)
return;
if (this.tmpNode == null) {
if (item instanceof Prefab) {
this.templateType = TemplateType.PREFAB;
this.tmpPrefab = item;
} else if (item instanceof Node) {
this.templateType = TemplateType.NODE;
this.tmpNode = item;
}
this._init();
return;
}
let t: any = this;
t._itemTmp = item;
t._itemTmpUt = item.getComponent(UITransform);
if (t._resizeMode == Layout.ResizeMode.CHILDREN)
t._itemSize = t._layout.cellSize;
else {
let itemUt: UITransform = item.getComponent(UITransform);
t._itemSize = new Size(itemUt.width, itemUt.height);
}
//获取ListItem，如果没有就取消选择模式
let com: any = item.getComponent(ScrollViewListItem);
let remove = false;
if (!com)
remove = true;
// if (com) {
// if (!com._btnCom && !item.getComponent(cc.Button)) {
// remove = true;
// }
// }
if (remove) {
t.selectedMode = SelectedType.NONE;
}
com = item.getComponent(Widget);
if (com && com.enabled) {
t._needUpdateWidget = true;
}
if (t.selectedMode == SelectedType.MULT)
t.multSelected = [];
switch (t._align) {
case Layout.Type.HORIZONTAL:
t._colLineNum = 1;
t._sizeType = false;
break;
case Layout.Type.VERTICAL:
t._colLineNum = 1;
t._sizeType = true;
break;
case Layout.Type.GRID:
switch (t._startAxis) {
case Layout.AxisDirection.HORIZONTAL:
//计算列数
let trimW: number = t._contentUt.width - t._leftGap - t._rightGap;
t._colLineNum = Math.floor((trimW + t._columnGap) / (t._itemSize.width + t._columnGap));
t._sizeType = true;
break;
case Layout.AxisDirection.VERTICAL:
//计算行数
let trimH: number = t._contentUt.height - t._topGap - t._bottomGap;
t._colLineNum = Math.floor((trimH + t._lineGap) / (t._itemSize.height + t._lineGap));
t._sizeType = false;
break;
}
break;
}
}
/**
* 检查是否初始化
* @param {Boolean} printLog 是否打印错误信息
* @returns
*/
checkInited(printLog: boolean = true) {
if (!this._inited) {
if (printLog)
console.error('List initialization not completed!');
return false;
}
return true;
}
//禁用 Layout 组件，自行计算 Content Size
_resizeContent() {
let t: any = this;
let result: number;
switch (t._align) {
case Layout.Type.HORIZONTAL: {
if (t._customSize) {
let fixed: any = t._getFixedSize(null);
result = t._leftGap + fixed.val + (t._itemSize.width * (t._numItems - fixed.count)) + (t._columnGap * (t._numItems - 1)) + t._rightGap;
} else {
result = t._leftGap + (t._itemSize.width * t._numItems) + (t._columnGap * (t._numItems - 1)) + t._rightGap;
}
break;
}
case Layout.Type.VERTICAL: {
if (t._customSize) {
let fixed: any = t._getFixedSize(null);
result = t._topGap + fixed.val + (t._itemSize.height * (t._numItems - fixed.count)) + (t._lineGap * (t._numItems - 1)) + t._bottomGap;
} else {
result = t._topGap + (t._itemSize.height * t._numItems) + (t._lineGap * (t._numItems - 1)) + t._bottomGap;
}
break;
}
case Layout.Type.GRID: {
//网格模式不支持居中
if (t.lackCenter)
t.lackCenter = false;
switch (t._startAxis) {
case Layout.AxisDirection.HORIZONTAL:
let lineNum: number = Math.ceil(t._numItems / t._colLineNum);
result = t._topGap + (t._itemSize.height * lineNum) + (t._lineGap * (lineNum - 1)) + t._bottomGap;
break;
case Layout.AxisDirection.VERTICAL:
let colNum: number = Math.ceil(t._numItems / t._colLineNum);
result = t._leftGap + (t._itemSize.width * colNum) + (t._columnGap * (colNum - 1)) + t._rightGap;
break;
}
break;
}
}
let layout: Layout = t.content.getComponent(Layout);
if (layout)
layout.enabled = false;
t._allItemSize = result!;
t._allItemSizeNoEdge = t._allItemSize - (t._sizeType ? (t._topGap + t._bottomGap) : (t._leftGap + t._rightGap));
if (t.cyclic) {
let totalSize: number = (t._sizeType ? t._thisNodeUt.height : t._thisNodeUt.width);
t._cyclicPos1 = 0;
totalSize -= t._cyclicPos1;
t._cyclicNum = Math.ceil(totalSize / t._allItemSizeNoEdge) + 1;
let spacing: number = t._sizeType ? t._lineGap : t._columnGap;
t._cyclicPos2 = t._cyclicPos1 + t._allItemSizeNoEdge + spacing;
t._cyclicAllItemSize = t._allItemSize + (t._allItemSizeNoEdge * (t._cyclicNum - 1)) + (spacing * (t._cyclicNum - 1));
t._cycilcAllItemSizeNoEdge = t._allItemSizeNoEdge * t._cyclicNum;
t._cycilcAllItemSizeNoEdge += spacing * (t._cyclicNum - 1);
// cc.log('_cyclicNum ->', t._cyclicNum, t._allItemSizeNoEdge, t._allItemSize, t._cyclicPos1, t._cyclicPos2);
}
t._lack = !t.cyclic && t._allItemSize < (t._sizeType ? t._thisNodeUt.height : t._thisNodeUt.width);
let slideOffset: number = ((!t._lack || !t.lackCenter) && t.lackSlide) ? 0 : .1;
let targetWH: number = t._lack ? ((t._sizeType ? t._thisNodeUt.height : t._thisNodeUt.width) - slideOffset) : (t.cyclic ? t._cyclicAllItemSize : t._allItemSize);
if (targetWH < 0)
targetWH = 0;
if (t._sizeType) {
t._contentUt.height = targetWH;
} else {
t._contentUt.width = targetWH;
}
// cc.log('_resizeContent() numItems =', t._numItems, '，content =', t.content);
}
//滚动进行时...
_onScrolling(ev: Event = null!) {
if (this.frameCount == null)
this.frameCount = this._updateRate;
if (!this._forceUpdate && (ev && ev.type != 'scroll-ended') && this.frameCount > 0) {
this.frameCount--;
return;
} else
this.frameCount = this._updateRate;
if (this._aniDelRuning)
return;
let scorv:ScrollView = this.node.getComponent(ScrollView)!
let maxPos = scorv.getMaxScrollOffset();
let curPos = scorv.getScrollOffset();
if (scorv.vertical) {
if (curPos.y - maxPos.y > 100) {
this.canRefresh = true;
}
} else if (scorv.horizontal) {
if (curPos.x - maxPos.x > 100) {
this.canRefresh = true;
}
}
//循环列表处理
if (this.cyclic) {
let scrollPos: any = this.content.getPosition();
scrollPos = this._sizeType ? scrollPos.y : scrollPos.x;
let addVal = this._allItemSizeNoEdge + (this._sizeType ? this._lineGap : this._columnGap);
let add: any = this._sizeType ? new Vec3(0, addVal, 0) : new Vec3(addVal, 0, 0);
let contentPos = this.content.getPosition();
switch (this._alignCalcType) {
case 1://单行HORIZONTAL（LEFT_TO_RIGHT）、网格VERTICAL（LEFT_TO_RIGHT）
if (scrollPos > -this._cyclicPos1) {
contentPos.set(-this._cyclicPos2, contentPos.y, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].subtract(add);
}
// if (this._beganPos) {
// this._beganPos += add;
// }
} else if (scrollPos < -this._cyclicPos2) {
contentPos.set(-this._cyclicPos1, contentPos.y, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].add(add);
}
// if (this._beganPos) {
// this._beganPos -= add;
// }
}
break;
case 2://单行HORIZONTAL（RIGHT_TO_LEFT）、网格VERTICAL（RIGHT_TO_LEFT）
if (scrollPos < this._cyclicPos1) {
contentPos.set(this._cyclicPos2, contentPos.y, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].add(add);
}
} else if (scrollPos > this._cyclicPos2) {
contentPos.set(this._cyclicPos1, contentPos.y, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].subtract(add);
}
}
break;
case 3://单列VERTICAL（TOP_TO_BOTTOM）、网格HORIZONTAL（TOP_TO_BOTTOM）
if (scrollPos < this._cyclicPos1) {
contentPos.set(contentPos.x, this._cyclicPos2, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].add(add);
}
} else if (scrollPos > this._cyclicPos2) {
contentPos.set(contentPos.x, this._cyclicPos1, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].subtract(add);
}
}
break;
case 4://单列VERTICAL（BOTTOM_TO_TOP）、网格HORIZONTAL（BOTTOM_TO_TOP）
if (scrollPos > -this._cyclicPos1) {
contentPos.set(contentPos.x, -this._cyclicPos2, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].subtract(add);
}
} else if (scrollPos < -this._cyclicPos2) {
contentPos.set(contentPos.x, -this._cyclicPos1, contentPos.z);
this.content.setPosition(contentPos);
if (this._scrollView.isAutoScrolling()) {
this._scrollView['_autoScrollStartPosition'] = this._scrollView['_autoScrollStartPosition'].add(add);
}
}
break;
}
}
this._calcViewPos();
let vTop!: number, vRight!: number, vBottom!: number, vLeft!: number;
if (this._sizeType) {
vTop = this.viewTop;
vBottom = this.viewBottom;
} else {
vRight = this.viewRight;
vLeft = this.viewLeft;
}
if (this._virtual) {
this.displayData = [];
let itemPos: any;
let curId: number = 0;
let endId: number = this._numItems - 1;
if (this._customSize) {
let breakFor: boolean = false;
//如果该item的位置在可视区域内，就推入displayData
for (; curId <= endId && !breakFor; curId++) {
itemPos = this._calcItemPos(curId);
switch (this._align) {
case Layout.Type.HORIZONTAL:
if (itemPos.right >= vLeft && itemPos.left <= vRight) {
this.displayData.push(itemPos);
} else if (curId != 0 && this.displayData.length > 0) {
breakFor = true;
}
break;
case Layout.Type.VERTICAL:
if (itemPos.bottom <= vTop && itemPos.top >= vBottom) {
this.displayData.push(itemPos);
} else if (curId != 0 && this.displayData.length > 0) {
breakFor = true;
}
break;
case Layout.Type.GRID:
switch (this._startAxis) {
case Layout.AxisDirection.HORIZONTAL:
if (itemPos.bottom <= vTop && itemPos.top >= vBottom) {
this.displayData.push(itemPos);
} else if (curId != 0 && this.displayData.length > 0) {
breakFor = true;
}
break;
case Layout.AxisDirection.VERTICAL:
if (itemPos.right >= vLeft && itemPos.left <= vRight) {
this.displayData.push(itemPos);
} else if (curId != 0 && this.displayData.length > 0) {
breakFor = true;
}
break;
}
break;
}
}
} else {
if (!this._itemSize) {
return;
}
let ww: number = this._itemSize.width + this._columnGap;
let hh: number = this._itemSize.height + this._lineGap;
switch (this._alignCalcType) {
case 1://单行HORIZONTAL（LEFT_TO_RIGHT）、网格VERTICAL（LEFT_TO_RIGHT）
curId = (vLeft - this._leftGap) / ww;
endId = (vRight - this._leftGap) / ww;
break;
case 2://单行HORIZONTAL（RIGHT_TO_LEFT）、网格VERTICAL（RIGHT_TO_LEFT）
curId = (-vRight - this._rightGap) / ww;
endId = (-vLeft - this._rightGap) / ww;
break;
case 3://单列VERTICAL（TOP_TO_BOTTOM）、网格HORIZONTAL（TOP_TO_BOTTOM）
curId = (-vTop - this._topGap) / hh;
endId = (-vBottom - this._bottomGap) / hh;
break;
case 4://单列VERTICAL（BOTTOM_TO_TOP）、网格HORIZONTAL（BOTTOM_TO_TOP）
curId = (vBottom - this._bottomGap) / hh;
endId = (vTop - this._topGap) / hh;
break;
}
curId = Math.floor(curId) * this._colLineNum;
endId = Math.ceil(endId) * this._colLineNum;
endId--;
if (curId < 0)
curId = 0;
if (endId >= this._numItems)
endId = this._numItems - 1;
for (; curId <= endId; curId++) {
this.displayData.push(this._calcItemPos(curId));
}
}
this._delRedundantItem();
if (this.displayData.length <= 0 || !this._numItems) { //if none, delete all.
this._lastDisplayData = [];
return;
}
this.firstListId = this.displayData[0].id;
this.displayItemNum = this.displayData.length;
let len: number = this._lastDisplayData.length;
let haveDataChange: boolean = this.displayItemNum != len;
if (haveDataChange) {
// 如果是逐帧渲染，需要排序
if (this.frameByFrameRenderNum > 0) {
this._lastDisplayData.sort((a, b) => { return a - b });
}
// 因List的显示数据是有序的，所以只需要判断数组长度是否相等，以及头、尾两个元素是否相等即可。
haveDataChange = this.firstListId != this._lastDisplayData[0] || this.displayData[this.displayItemNum - 1].id != this._lastDisplayData[len - 1];
}
if (this._forceUpdate || haveDataChange) { //如果是强制更新
if (this.frameByFrameRenderNum > 0) {
// if (this._updateDone) {
// this._lastDisplayData = [];
//逐帧渲染
if (this._numItems > 0) {
if (!this._updateDone) {
this._doneAfterUpdate = true;
} else {
this._updateCounter = 0;
}
this._updateDone = false;
} else {
this._updateCounter = 0;
this._updateDone = true;
}
// }
} else {
//直接渲染
this._lastDisplayData = [];
// cc.log('List Display Data II::', this.displayData);
for (let c = 0; c < this.displayItemNum; c++) {
this._createOrUpdateItem(this.displayData[c]);
}
this._forceUpdate = false;
}
}
this._calcNearestItem();
}
}
//计算可视范围
_calcViewPos() {
let scrollPos: any = this.content.getPosition();
switch (this._alignCalcType) {
case 1://单行HORIZONTAL（LEFT_TO_RIGHT）、网格VERTICAL（LEFT_TO_RIGHT）
this.elasticLeft = scrollPos.x > 0 ? scrollPos.x : 0;
this.viewLeft = (scrollPos.x < 0 ? -scrollPos.x : 0) - this.elasticLeft;
this.viewRight = this.viewLeft + this._thisNodeUt.width;
this.elasticRight = this.viewRight > this._contentUt.width ? Math.abs(this.viewRight - this._contentUt.width) : 0;
this.viewRight += this.elasticRight;
// cc.log(this.elasticLeft, this.elasticRight, this.viewLeft, this.viewRight);
break;
case 2://单行HORIZONTAL（RIGHT_TO_LEFT）、网格VERTICAL（RIGHT_TO_LEFT）
this.elasticRight = scrollPos.x < 0 ? -scrollPos.x : 0;
this.viewRight = (scrollPos.x > 0 ? -scrollPos.x : 0) + this.elasticRight;
this.viewLeft = this.viewRight - this._thisNodeUt.width;
this.elasticLeft = this.viewLeft < -this._contentUt.width ? Math.abs(this.viewLeft + this._contentUt.width) : 0;
this.viewLeft -= this.elasticLeft;
// cc.log(this.elasticLeft, this.elasticRight, this.viewLeft, this.viewRight);
break;
case 3://单列VERTICAL（TOP_TO_BOTTOM）、网格HORIZONTAL（TOP_TO_BOTTOM）
this.elasticTop = scrollPos.y < 0 ? Math.abs(scrollPos.y) : 0;
this.viewTop = (scrollPos.y > 0 ? -scrollPos.y : 0) + this.elasticTop;
this.viewBottom = this.viewTop - this._thisNodeUt.height;
this.elasticBottom = this.viewBottom < -this._contentUt.height ? Math.abs(this.viewBottom + this._contentUt.height) : 0;
this.viewBottom += this.elasticBottom;
// cc.log(this.elasticTop, this.elasticBottom, this.viewTop, this.viewBottom);
break;
case 4://单列VERTICAL（BOTTOM_TO_TOP）、网格HORIZONTAL（BOTTOM_TO_TOP）
this.elasticBottom = scrollPos.y > 0 ? Math.abs(scrollPos.y) : 0;
this.viewBottom = (scrollPos.y < 0 ? -scrollPos.y : 0) - this.elasticBottom;
this.viewTop = this.viewBottom + this._thisNodeUt.height;
this.elasticTop = this.viewTop > this._contentUt.height ? Math.abs(this.viewTop - this._contentUt.height) : 0;
this.viewTop -= this.elasticTop;
// cc.log(this.elasticTop, this.elasticBottom, this.viewTop, this.viewBottom);
break;
}
}
//计算位置 根据id
_calcItemPos(id: number) {
let width!: number, height!: number, top!: number, bottom!: number, left!: number, right!: number, itemX!: number, itemY!: number;
switch (this._align) {
case Layout.Type.HORIZONTAL:
switch (this._horizontalDir) {
case Layout.HorizontalDirection.LEFT_TO_RIGHT: {
if (this._customSize) {
let fixed: any = this._getFixedSize(id);
left = this._leftGap + ((this._itemSize.width + this._columnGap) * (id - fixed.count)) + (fixed.val + (this._columnGap * fixed.count));
let cs: number = this._customSize[id];
width = (cs > 0 ? cs : this._itemSize.width);
} else {
left = this._leftGap + ((this._itemSize.width + this._columnGap) * id);
width = this._itemSize.width;
}
if (this.lackCenter) {
left -= this._leftGap;
let offset: number = (this._contentUt.width / 2) - (this._allItemSizeNoEdge / 2);
left += offset;
}
right = left + width;
return {
id: id,
left: left,
right: right,
x: left + (this._itemTmpUt.anchorX * width),
y: this._itemTmp.y,
};
}
case Layout.HorizontalDirection.RIGHT_TO_LEFT: {
if (this._customSize) {
let fixed: any = this._getFixedSize(id);
right = -this._rightGap - ((this._itemSize.width + this._columnGap) * (id - fixed.count)) - (fixed.val + (this._columnGap * fixed.count));
let cs: number = this._customSize[id];
width = (cs > 0 ? cs : this._itemSize.width);
} else {
right = -this._rightGap - ((this._itemSize.width + this._columnGap) * id);
width = this._itemSize.width;
}
if (this.lackCenter) {
right += this._rightGap;
let offset: number = (this._contentUt.width / 2) - (this._allItemSizeNoEdge / 2);
right -= offset;
}
left = right - width;
return {
id: id,
right: right,
left: left,
x: left + (this._itemTmpUt.anchorX * width),
y: this._itemTmp.y,
};
}
}
break;
case Layout.Type.VERTICAL: {
switch (this._verticalDir) {
case Layout.VerticalDirection.TOP_TO_BOTTOM: {
if (this._customSize) {
let fixed: any = this._getFixedSize(id);
top = -this._topGap - ((this._itemSize.height + this._lineGap) * (id - fixed.count)) - (fixed.val + (this._lineGap * fixed.count));
let cs: number = this._customSize[id];
height = (cs > 0 ? cs : this._itemSize.height);
} else {
top = -this._topGap - ((this._itemSize.height + this._lineGap) * id);
height = this._itemSize.height;
}
// if (this.lackCenter) {
// top += this._topGap;
// let offset: number = (this._contentUt.height / 2) - (this._allItemSizeNoEdge / 2);
// top -= offset;
// }
bottom = top - height;
if (this.lackCenter) {
let offset: number = (this._contentUt.height / 2) - (this._allItemSizeNoEdge / 2);
top -= offset;
bottom -= offset;
}
return {
id: id,
top: top,
bottom: bottom,
x: this._itemTmp.x,
y: bottom + (this._itemTmpUt.anchorY * height),
};
}
case Layout.VerticalDirection.BOTTOM_TO_TOP: {
if (this._customSize) {
let fixed: any = this._getFixedSize(id);
bottom = this._bottomGap + ((this._itemSize.height + this._lineGap) * (id - fixed.count)) + (fixed.val + (this._lineGap * fixed.count));
let cs: number = this._customSize[id];
height = (cs > 0 ? cs : this._itemSize.height);
} else {
bottom = this._bottomGap + ((this._itemSize.height + this._lineGap) * id);
height = this._itemSize.height;
}
// if (this.lackCenter) {
// bottom -= this._bottomGap;
// let offset: number = (this._contentUt.height / 2) - (this._allItemSizeNoEdge / 2);
// bottom += offset;
// }
top = bottom + height;
if (this.lackCenter) {
let offset: number = (this._contentUt.height / 2) - (this._allItemSizeNoEdge / 2);
top += offset;
bottom += offset;
}
return {
id: id,
top: top,
bottom: bottom,
x: this._itemTmp.x,
y: bottom + (this._itemTmpUt.anchorY * height),
};
break;
}
}
}
case Layout.Type.GRID: {
let colLine: number = Math.floor(id / this._colLineNum);
switch (this._startAxis) {
case Layout.AxisDirection.HORIZONTAL: {
switch (this._verticalDir) {
case Layout.VerticalDirection.TOP_TO_BOTTOM: {
top = -this._topGap - ((this._itemSize.height + this._lineGap) * colLine);
bottom = top - this._itemSize.height;
itemY = bottom + (this._itemTmpUt.anchorY * this._itemSize.height);
break;
}
case Layout.VerticalDirection.BOTTOM_TO_TOP: {
bottom = this._bottomGap + ((this._itemSize.height + this._lineGap) * colLine);
top = bottom + this._itemSize.height;
itemY = bottom + (this._itemTmpUt.anchorY * this._itemSize.height);
break;
}
}
itemX = this._leftGap + ((id % this._colLineNum) * (this._itemSize.width + this._columnGap));
switch (this._horizontalDir) {
case Layout.HorizontalDirection.LEFT_TO_RIGHT: {
itemX += (this._itemTmpUt.anchorX * this._itemSize.width);
itemX -= (this._contentUt.anchorX * this._contentUt.width);
break;
}
case Layout.HorizontalDirection.RIGHT_TO_LEFT: {
itemX += ((1 - this._itemTmpUt.anchorX) * this._itemSize.width);
itemX -= ((1 - this._contentUt.anchorX) * this._contentUt.width);
itemX *= -1;
break;
}
}
return {
id: id,
top: top,
bottom: bottom,
x: itemX,
y: itemY,
};
}
case Layout.AxisDirection.VERTICAL: {
switch (this._horizontalDir) {
case Layout.HorizontalDirection.LEFT_TO_RIGHT: {
left = this._leftGap + ((this._itemSize.width + this._columnGap) * colLine);
right = left + this._itemSize.width;
itemX = left + (this._itemTmpUt.anchorX * this._itemSize.width);
itemX -= (this._contentUt.anchorX * this._contentUt.width);
break;
}
case Layout.HorizontalDirection.RIGHT_TO_LEFT: {
right = -this._rightGap - ((this._itemSize.width + this._columnGap) * colLine);
left = right - this._itemSize.width;
itemX = left + (this._itemTmpUt.anchorX * this._itemSize.width);
itemX += ((1 - this._contentUt.anchorX) * this._contentUt.width);
break;
}
}
itemY = -this._topGap - ((id % this._colLineNum) * (this._itemSize.height + this._lineGap));
switch (this._verticalDir) {
case Layout.VerticalDirection.TOP_TO_BOTTOM: {
itemY -= ((1 - this._itemTmpUt.anchorY) * this._itemSize.height);
itemY += ((1 - this._contentUt.anchorY) * this._contentUt.height);
break;
}
case Layout.VerticalDirection.BOTTOM_TO_TOP: {
itemY -= ((this._itemTmpUt.anchorY) * this._itemSize.height);
itemY += (this._contentUt.anchorY * this._contentUt.height);
itemY *= -1;
break;
}
}
return {
id: id,
left: left,
right: right,
x: itemX,
y: itemY,
};
}
}
break;
}
}
}
//计算已存在的Item的位置
_calcExistItemPos(id: number) {
let item: any = this.getItemByListId(id);
if (!item)
return null;
let ut: UITransform = item.getComponent(UITransform);
let pos: Vec3 = item.getPosition();
let data: any = {
id: id,
x: pos.x,
y: pos.y,
}
if (this._sizeType) {
data.top = pos.y + (ut.height * (1 - ut.anchorY));
data.bottom = pos.y - (ut.height * ut.anchorY);
} else {
data.left = pos.x - (ut.width * ut.anchorX);
data.right = pos.x + (ut.width * (1 - ut.anchorX));
}
return data;
}
//获取Item位置
getItemPos(id: number) {
if (this._virtual)
return this._calcItemPos(id);
else {
if (this.frameByFrameRenderNum)
return this._calcItemPos(id);
else
return this._calcExistItemPos(id);
}
}
//获取固定尺寸
_getFixedSize(listId: number) {
if (!this._customSize)
return null;
if (listId == null)
listId = this._numItems;
let fixed: number = 0;
let count: number = 0;
for (let id in this._customSize) {
if (parseInt(id) < listId) {
fixed += this._customSize[id];
count++;
}
}
return {
val: fixed,
count: count,
}
}
//滚动结束时..
_onScrollBegan() {
this._beganPos = this._sizeType ? this.viewTop : this.viewLeft;
}
//滚动结束时..
_onScrollEnded() {
let t: any = this;
t._curScrollIsTouch = false;
if (t.scrollToListId != null) {
let item: any = t.getItemByListId(t.scrollToListId);
t.scrollToListId = null;
if (item) {
tween(item)
.to(.1, { scale: 1.06 })
.to(.1, { scale: 1 })
.start();
}
}
t._onScrolling();
if (t._slideMode == SlideType.ADHERING &&
!t.adhering
) {
//cc.log(t.adhering, t._scrollView.isAutoScrolling(), t._scrollView.isScrolling());
t.adhere();
} else if (t._slideMode == SlideType.PAGE) {
if (t._beganPos != null && t._curScrollIsTouch) {
this._pageAdhere();
} else {
t.adhere();
}
}
}
// 触摸时
_onTouchStart(ev:any, captureListeners:any) {
if (this._scrollView['_hasNestedViewGroup'](ev, captureListeners))
return;
this._curScrollIsTouch = true;
let isMe = ev.eventPhase === 2 && ev.target === this.node;
if (!isMe) {
let itemNode: any = ev.target;
while (itemNode._listId == null && itemNode.parent)
itemNode = itemNode.parent;
this._scrollItem = itemNode._listId != null ? itemNode : ev.target;
}
}
//触摸抬起时..
_onTouchUp() {
let t: any = this;
t._scrollPos = null;
if (t._slideMode == SlideType.ADHERING) {
if (this.adhering)
this._adheringBarrier = true;
t.adhere();
} else if (t._slideMode == SlideType.PAGE) {
if (t._beganPos != null) {
this._pageAdhere();
} else {
t.adhere();
}
}
this._scrollItem = null;
}
_onTouchCancelled(ev:any, captureListeners:any) {
let t = this;
if (t._scrollView['_hasNestedViewGroup'](ev, captureListeners) || ev.simulate)
return;
t._scrollPos = null!;
if (t._slideMode == SlideType.ADHERING) {
if (t.adhering)
t._adheringBarrier = true;
t.adhere();
} else if (t._slideMode == SlideType.PAGE) {
if (t._beganPos != null) {
t._pageAdhere();
} else {
t.adhere();
}
}
this._scrollItem = null;
}
//当尺寸改变
_onSizeChanged() {
if (this.checkInited(false))
this._onScrolling();
}
//当Item自适应
_onItemAdaptive(item: any) {
let ut: UITransform = item.getComponent(UITransform);
// if (this.checkInited(false)) {
if (
(!this._sizeType && ut.width != this._itemSize.width)
|| (this._sizeType && ut.height != this._itemSize.height)
) {
if (!this._customSize)
this._customSize = {};
let val = this._sizeType ? ut.height : ut.width;
if (this._customSize[item._listId] != val) {
this._customSize[item._listId] = val;
this._resizeContent();
// this.content.children.forEach((child: Node) => {
// this._updateItemPos(child);
// });
this.updateAll();
// 如果当前正在运行 scrollTo，肯定会不准确，在这里做修正
if (this._scrollToListId != null) {
this._scrollPos = null!;
this.unschedule(this._scrollToSo);
this.scrollTo(this._scrollToListId, Math.max(0, this._scrollToEndTime - ((new Date()).getTime() / 1000)));
}
}
}
// }
}
//PAGE粘附
_pageAdhere() {
let t = this;
if (!t.cyclic && (t.elasticTop > 0 || t.elasticRight > 0 || t.elasticBottom > 0 || t.elasticLeft > 0))
return;
let curPos = t._sizeType ? t.viewTop : t.viewLeft;
let dis = (t._sizeType ? t._thisNodeUt.height : t._thisNodeUt.width) * t.pageDistance;
let canSkip = Math.abs(t._beganPos - curPos) > dis;
if (canSkip) {
let timeInSecond = .5;
switch (t._alignCalcType) {
case 1://单行HORIZONTAL（LEFT_TO_RIGHT）、网格VERTICAL（LEFT_TO_RIGHT）
case 4://单列VERTICAL（BOTTOM_TO_TOP）、网格HORIZONTAL（BOTTOM_TO_TOP）
if (t._beganPos > curPos) {
t.prePage(timeInSecond);
// cc.log('_pageAdhere PPPPPPPPPPPPPPP');
} else {
t.nextPage(timeInSecond);
// cc.log('_pageAdhere NNNNNNNNNNNNNNN');
}
break;
case 2://单行HORIZONTAL（RIGHT_TO_LEFT）、网格VERTICAL（RIGHT_TO_LEFT）
case 3://单列VERTICAL（TOP_TO_BOTTOM）、网格HORIZONTAL（TOP_TO_BOTTOM）
if (t._beganPos < curPos) {
t.prePage(timeInSecond);
} else {
t.nextPage(timeInSecond);
}
break;
}
} else if (t.elasticTop <= 0 && t.elasticRight <= 0 && t.elasticBottom <= 0 && t.elasticLeft <= 0) {
t.adhere();
}
t._beganPos = null!;
}
//粘附
adhere() {
let t: any = this;
if (!t.checkInited())
return;
if (t.elasticTop > 0 || t.elasticRight > 0 || t.elasticBottom > 0 || t.elasticLeft > 0)
return;
t.adhering = true;
t._calcNearestItem();
let offset: number = (t._sizeType ? t._topGap : t._leftGap) / (t._sizeType ? t._thisNodeUt.height : t._thisNodeUt.width);
let timeInSecond: number = .7;
t.scrollTo(t.nearestListId, timeInSecond, offset);
}
//Update..
update() {
if (this.frameByFrameRenderNum <= 0 || this._updateDone)
return;
// cc.log(this.displayData.length, this._updateCounter, this.displayData[this._updateCounter]);
if (this._virtual) {
let len: number = (this._updateCounter + this.frameByFrameRenderNum) > this.displayItemNum ? this.displayItemNum : (this._updateCounter + this.frameByFrameRenderNum);
for (let n: number = this._updateCounter; n < len; n++) {
let data: any = this.displayData[n];
if (data) {
this._createOrUpdateItem(data);
}
}
if (this._updateCounter >= this.displayItemNum - 1) { //最后一个
if (this._doneAfterUpdate) {
this._updateCounter = 0;
this._updateDone = false;
// if (!this._scrollView.isScrolling())
this._doneAfterUpdate = false;
} else {
this._updateDone = true;
this._delRedundantItem();
this._forceUpdate = false;
this._calcNearestItem();
if (this.slideMode == SlideType.PAGE)
this.curPageNum = this.nearestListId;
}
} else {
this._updateCounter += this.frameByFrameRenderNum;
}
} else {
if (this._updateCounter < this._numItems) {
let len: number = (this._updateCounter + this.frameByFrameRenderNum) > this._numItems ? this._numItems : (this._updateCounter + this.frameByFrameRenderNum);
for (let n: number = this._updateCounter; n < len; n++) {
this._createOrUpdateItem2(n);
}
this._updateCounter += this.frameByFrameRenderNum;
} else {
this._updateDone = true;
this._calcNearestItem();
if (this.slideMode == SlideType.PAGE)
this.curPageNum = this.nearestListId;
}
}
}
/**
* 创建或更新Item（虚拟列表用）
* @param {Object} data 数据
*/
_createOrUpdateItem(data: any) {
let item: any = this.getItemByListId(data.id);
if (!item) { //如果不存在
let canGet: boolean = this._pool.size() > 0;
if (canGet) {
item = this._pool.get();
// cc.log('从池中取出:: 旧id =', item['_listId'], '，新id =', data.id, item);
} else {
item = instantiate(this._itemTmp);
// cc.log('新建::', data.id, item);
}
if (!canGet || !isValid(item)) {
item = instantiate(this._itemTmp);
canGet = false;
}
if (item._listId != data.id) {
item._listId = data.id;
let ut: UITransform = item.getComponent(UITransform);
ut.setContentSize(this._itemSize);
}
item.setPosition(new Vec3(data.x, data.y, 0));
this._resetItemSize(item);
this.content.addChild(item);
if (canGet && this._needUpdateWidget) {
let widget: Widget = item.getComponent(Widget);
if (widget)
widget.updateAlignment();
}
item.setSiblingIndex(this.content.children.length - 1);
let listItem: ScrollViewListItem = item.getComponent(ScrollViewListItem);
item['listItem'] = listItem;
if (listItem) {
listItem.listId = data.id;
listItem.list = this;
listItem._registerEvent();
}
if (this.renderEvent) {
EventHandler.emitEvents([this.renderEvent], item, data.id % this._actualNumItems);
}
} else if (this._forceUpdate && this.renderEvent) { //强制更新
item.setPosition(new Vec3(data.x, data.y, 0));
this._resetItemSize(item);
// cc.log('ADD::', data.id, item);
if (this.renderEvent) {
EventHandler.emitEvents([this.renderEvent], item, data.id % this._actualNumItems);
}
}
this._resetItemSize(item);
this._updateListItem(item['listItem']);
if (this._lastDisplayData.indexOf(data.id) < 0) {
this._lastDisplayData.push(data.id);
}
}
//创建或更新Item（非虚拟列表用）
_createOrUpdateItem2(listId: number) {
let item: any = this.content.children[listId];
let listItem!: ScrollViewListItem;
if (!item) { //如果不存在
item = instantiate(this._itemTmp);
item._listId = listId;
this.content.addChild(item);
listItem = item.getComponent(ScrollViewListItem);
item['listItem'] = listItem;
if (listItem) {
listItem.listId = listId;
listItem.list = this;
listItem._registerEvent();
}
if (this.renderEvent) {
EventHandler.emitEvents([this.renderEvent], item, listId % this._actualNumItems);
}
} else if (this._forceUpdate && this.renderEvent) { //强制更新
item._listId = listId;
if (listItem)
listItem.listId = listId;
if (this.renderEvent) {
EventHandler.emitEvents([this.renderEvent], item, listId % this._actualNumItems);
}
}
this._updateListItem(listItem);
if (this._lastDisplayData.indexOf(listId) < 0) {
this._lastDisplayData.push(listId);
}
}
_updateListItem(listItem: ScrollViewListItem) {
if (!listItem)
return;
if (this.selectedMode > SelectedType.NONE) {
let item: any = listItem.node;
switch (this.selectedMode) {
case SelectedType.SINGLE:
listItem.selected = this.selectedId == item._listId;
break;
case SelectedType.MULT:
listItem.selected = this.multSelected.indexOf(item._listId) >= 0;
break;
}
}
}
//仅虚拟列表用
_resetItemSize(item: any) {
return;
let size: number;
let ut: UITransform = item.getComponent(UITransform);
if (this._customSize && this._customSize[item._listId]) {
size = this._customSize[item._listId];
} else {
if (this._colLineNum > 1)
ut.setContentSize(this._itemSize);
else
size = this._sizeType ? this._itemSize.height : this._itemSize.width;
}
if (size) {
if (this._sizeType)
ut.height = size;
else
ut.width = size;
}
}
/**
* 更新Item位置
* @param {Number||Node} listIdOrItem
*/
_updateItemPos(listIdOrItem: any) {
let item: any = isNaN(listIdOrItem) ? listIdOrItem : this.getItemByListId(listIdOrItem);
let pos: any = this.getItemPos(item._listId);
item.setPosition(pos.x, pos.y);
}
/**
* 设置多选
* @param {Array} args 可以是单个listId，也可是个listId数组
* @param {Boolean} bool 值，如果为null的话，则直接用args覆盖
*/
setMultSelected(args: any, bool: boolean) {
let t: any = this;
if (!t.checkInited())
return;
if (!Array.isArray(args)) {
args = [args];
}
if (bool == null) {
t.multSelected = args;
} else {
let listId: number, sub: number;
if (bool) {
for (let n: number = args.length - 1; n >= 0; n--) {
listId = args[n];
sub = t.multSelected.indexOf(listId);
if (sub < 0) {
t.multSelected.push(listId);
}
}
} else {
for (let n: number = args.length - 1; n >= 0; n--) {
listId = args[n];
sub = t.multSelected.indexOf(listId);
if (sub >= 0) {
t.multSelected.splice(sub, 1);
}
}
}
}
t._forceUpdate = true;
t._onScrolling();
}
/**
* 获取多选数据
* @returns
*/
getMultSelected() {
return this.multSelected;
}
/**
* 多选是否有选择
* @param {number} listId 索引
* @returns
*/
hasMultSelected(listId: number) {
return this.multSelected && this.multSelected.indexOf(listId) >= 0;
}
/**
* 更新指定的Item
* @param {Array} args 单个listId，或者数组
* @returns
*/
updateItem(args: any) {
if (!this.checkInited())
return;
if (!Array.isArray(args)) {
args = [args];
}
for (let n: number = 0, len: number = args.length; n < len; n++) {
let listId: number = args[n];
let item: any = this.getItemByListId(listId);
if (item)
EventHandler.emitEvents([this.renderEvent], item, listId % this._actualNumItems);
}
}
/**
* 更新全部
*/
updateAll() {
if (!this.checkInited())
return;
this.numItems = this.numItems;
}
/**
* 根据ListID获取Item
* @param {Number} listId
* @returns
*/
getItemByListId(listId: number) {
if (this.content) {
for (let n: number = this.content.children.length - 1; n >= 0; n--) {
let item: any = this.content.children[n];
if (item._listId == listId)
return item;
}
}
}
/**
* 获取在显示区域外的Item
* @returns
*/
_getOutsideItem() {
let item: any;
let result: any[] = [];
for (let n: number = this.content.children.length - 1; n >= 0; n--) {
item = this.content.children[n];
if (!this.displayData.find(d => d.id == item._listId)) {
result.push(item);
}
}
return result;
}
//删除显示区域以外的Item
_delRedundantItem() {
if (this._virtual) {
let arr: any[] = this._getOutsideItem();
for (let n: number = arr.length - 1; n >= 0; n--) {
let item: any = arr[n];
if (this._scrollItem && item._listId == this._scrollItem._listId)
continue;
item.isCached = true;
this._pool.put(item);
for (let m: number = this._lastDisplayData.length - 1; m >= 0; m--) {
if (this._lastDisplayData[m] == item._listId) {
this._lastDisplayData.splice(m, 1);
break;
}
}
}
// cc.log('存入::', str, ' pool.length =', this._pool.length);
} else {
while (this.content.children.length > this._numItems) {
this._delSingleItem(this.content.children[this.content.children.length - 1]);
}
}
}
//删除单个Item
_delSingleItem(item: any) {
// cc.log('DEL::', item['_listId'], item);
item.removeFromParent();
if (item.destroy)
item.destroy();
item = null;
}
/**
* 动效删除Item（此方法只适用于虚拟列表，即_virtual=true）
* 一定要在回调函数里重新设置新的numItems进行刷新，毕竟本List是靠数据驱动的。
*/
aniDelItem(listId: number, callFunc: Function, aniType: number) {
let t: any = this;
if (!t.checkInited() || t.cyclic || !t._virtual)
return console.error('This function is not allowed to be called!');
if (!callFunc)
return console.error('CallFunc are not allowed to be NULL, You need to delete the corresponding index in the data array in the CallFunc!');
if (t._aniDelRuning)
return console.warn('Please wait for the current deletion to finish!');
let item: any = t.getItemByListId(listId);
let listItem: ScrollViewListItem;
if (!item) {
callFunc(listId);
return;
} else {
listItem = item.getComponent(ScrollViewListItem);
}
t._aniDelRuning = true;
t._aniDelCB = callFunc;
t._aniDelItem = item;
t._aniDelBeforePos = item.position;
t._aniDelBeforeScale = item.scale;
let curLastId: number = t.displayData[t.displayData.length - 1].id;
let resetSelectedId: boolean = listItem.selected;
listItem.showAni(aniType, () => {
//判断有没有下一个，如果有的话，创建粗来
let newId!: number;
if (curLastId < t._numItems - 2) {
newId = curLastId + 1;
}
if (newId != null) {
let newData: any = t._calcItemPos(newId);
t.displayData.push(newData);
if (t._virtual)
t._createOrUpdateItem(newData);
else
t._createOrUpdateItem2(newId);
} else
t._numItems--;
if (t.selectedMode == SelectedType.SINGLE) {
if (resetSelectedId) {
t._selectedId = -1;
} else if (t._selectedId - 1 >= 0) {
t._selectedId--;
}
} else if (t.selectedMode == SelectedType.MULT && t.multSelected.length) {
let sub: number = t.multSelected.indexOf(listId);
if (sub >= 0) {
t.multSelected.splice(sub, 1);
}
//多选的数据，在其后的全部减一
for (let n: number = t.multSelected.length - 1; n >= 0; n--) {
let id: number = t.multSelected[n];
if (id >= listId)
t.multSelected[n]--;
}
}
if (t._customSize) {
if (t._customSize[listId])
delete t._customSize[listId];
let newCustomSize: any = {};
let size: number;
for (let id in t._customSize) {
size = t._customSize[id];
let idNumber: number = parseInt(id);
newCustomSize[idNumber - (idNumber >= listId ? 1 : 0)] = size;
}
t._customSize = newCustomSize;
}
//后面的Item向前怼的动效
let sec: number = .2333;
let twe: Tween<Node>, haveCB!: boolean;
for (let n: number = newId != null ? newId : curLastId; n >= listId + 1; n--) {
item = t.getItemByListId(n);
if (item) {
let posData: any = t._calcItemPos(n - 1);
twe = tween(item)
.to(sec, { position: new Vec3(posData.x, posData.y, 0) });
if (n <= listId + 1) {
haveCB = true;
twe.call(() => {
t._aniDelRuning = false;
callFunc(listId);
delete t._aniDelCB;
});
}
twe.start();
}
}
if (!haveCB) {
t._aniDelRuning = false;
callFunc(listId);
t._aniDelCB = null;
}
}, true);
}
/**
* 滚动到..
* @param {Number} listId 索引（如果<0，则滚到首个Item位置，如果>=_numItems，则滚到最末Item位置）
* @param {Number} timeInSecond 时间
* @param {Number} offset 索引目标位置偏移，0-1
* @param {Boolean} overStress 滚动后是否强调该Item（这只是个实验功能）
*/
scrollTo(listId: number, timeInSecond: number = .5, offset: number = null!, overStress: boolean = false) {
let t = this;
if (!t.checkInited(false))
return;
// t._scrollView.stopAutoScroll();
if (timeInSecond == null) //默认0.5
timeInSecond = .5;
else if (timeInSecond < 0)
timeInSecond = 0;
if (listId < 0)
listId = 0;
else if (listId >= t._numItems)
listId = t._numItems - 1;
// 以防设置了numItems之后layout的尺寸还未更新
if (!t._virtual && t._layout && t._layout.enabled)
t._layout.updateLayout();
let pos = t.getItemPos(listId);
if (!pos) {
return DEV && console.error('pos is null', listId);
}
let targetX: number, targetY: number;
switch (t._alignCalcType) {
case 1://单行HORIZONTAL（LEFT_TO_RIGHT）、网格VERTICAL（LEFT_TO_RIGHT）
targetX = pos.left;
if (offset != null)
targetX -= t._thisNodeUt.width * offset;
else
targetX -= t._leftGap;
pos = new Vec3(targetX, 0, 0);
break;
case 2://单行HORIZONTAL（RIGHT_TO_LEFT）、网格VERTICAL（RIGHT_TO_LEFT）
targetX = pos.right - t._thisNodeUt.width;
if (offset != null)
targetX += t._thisNodeUt.width * offset;
else
targetX += t._rightGap;
pos = new Vec3(targetX + t._contentUt.width, 0, 0);
break;
case 3://单列VERTICAL（TOP_TO_BOTTOM）、网格HORIZONTAL（TOP_TO_BOTTOM）
targetY = pos.top;
if (offset != null)
targetY += t._thisNodeUt.height * offset;
else
targetY += t._topGap;
pos = new Vec3(0, -targetY, 0);
break;
case 4://单列VERTICAL（BOTTOM_TO_TOP）、网格HORIZONTAL（BOTTOM_TO_TOP）
targetY = pos.bottom + t._thisNodeUt.height;
if (offset != null)
targetY -= t._thisNodeUt.height * offset;
else
targetY -= t._bottomGap;
pos = new Vec3(0, -targetY + t._contentUt.height, 0);
break;
}
let viewPos: any = t.content.getPosition();
viewPos = Math.abs(t._sizeType ? viewPos.y : viewPos.x);
let comparePos = t._sizeType ? pos.y : pos.x;
let runScroll = Math.abs((t._scrollPos != null ? t._scrollPos : viewPos) - comparePos) > .5;
// cc.log(runScroll, t._scrollPos, viewPos, comparePos)
// t._scrollView.stopAutoScroll();
if (runScroll) {
t._scrollView.scrollToOffset(pos, timeInSecond);
t._scrollToListId = listId;
t._scrollToEndTime = ((new Date()).getTime() / 1000) + timeInSecond;
// cc.log(listId, t.content.width, t.content.getPosition(), pos);
t._scrollToSo = t.scheduleOnce(() => {
if (!t._adheringBarrier) {
t.adhering = t._adheringBarrier = false;
}
t._scrollPos =
t._scrollToListId =
t._scrollToEndTime =
t._scrollToSo =
null!;
//cc.log('2222222222', t._adheringBarrier)
if (overStress) {
// t.scrollToListId = listId;
let item = t.getItemByListId(listId);
if (item) {
tween(item)
.to(.1, { scale: 1.05 })
.to(.1, { scale: 1 })
.start();
}
}
}, timeInSecond + .1);
if (timeInSecond <= 0) {
t._onScrolling();
}
}
}
/**
* 计算当前滚动窗最近的Item
*/
_calcNearestItem() {
let t: any = this;
t.nearestListId = null;
let data: any, center: number;
if (t._virtual)
t._calcViewPos();
let vTop: number, vRight: number, vBottom: number, vLeft: number;
vTop = t.viewTop;
vRight = t.viewRight;
vBottom = t.viewBottom;
vLeft = t.viewLeft;
let breakFor: boolean = false;
for (let n = 0; n < t.content.children.length && !breakFor; n += t._colLineNum) {
data = t._virtual ? t.displayData[n] : t._calcExistItemPos(n);
if (data) {
center = t._sizeType ? ((data.top + data.bottom) / 2) : (center = (data.left + data.right) / 2);
switch (t._alignCalcType) {
case 1://单行HORIZONTAL（LEFT_TO_RIGHT）、网格VERTICAL（LEFT_TO_RIGHT）
if (data.right >= vLeft) {
t.nearestListId = data.id;
if (vLeft > center)
t.nearestListId += t._colLineNum;
breakFor = true;
}
break;
case 2://单行HORIZONTAL（RIGHT_TO_LEFT）、网格VERTICAL（RIGHT_TO_LEFT）
if (data.left <= vRight) {
t.nearestListId = data.id;
if (vRight < center)
t.nearestListId += t._colLineNum;
breakFor = true;
}
break;
case 3://单列VERTICAL（TOP_TO_BOTTOM）、网格HORIZONTAL（TOP_TO_BOTTOM）
if (data.bottom <= vTop) {
t.nearestListId = data.id;
if (vTop < center)
t.nearestListId += t._colLineNum;
breakFor = true;
}
break;
case 4://单列VERTICAL（BOTTOM_TO_TOP）、网格HORIZONTAL（BOTTOM_TO_TOP）
if (data.top >= vBottom) {
t.nearestListId = data.id;
if (vBottom > center)
t.nearestListId += t._colLineNum;
breakFor = true;
}
break;
}
}
}
//判断最后一个Item。。。（哎，这些判断真心恶心，判断了前面的还要判断最后一个。。。一开始呢，就只有一个布局（单列布局），那时候代码才三百行，后来就想着完善啊，艹..这坑真深，现在这行数都一千五了= =||）
data = t._virtual ? t.displayData[t.displayItemNum - 1] : t._calcExistItemPos(t._numItems - 1);
if (data && data.id == t._numItems - 1) {
center = t._sizeType ? ((data.top + data.bottom) / 2) : (center = (data.left + data.right) / 2);
switch (t._alignCalcType) {
case 1://单行HORIZONTAL（LEFT_TO_RIGHT）、网格VERTICAL（LEFT_TO_RIGHT）
if (vRight > center)
t.nearestListId = data.id;
break;
case 2://单行HORIZONTAL（RIGHT_TO_LEFT）、网格VERTICAL（RIGHT_TO_LEFT）
if (vLeft < center)
t.nearestListId = data.id;
break;
case 3://单列VERTICAL（TOP_TO_BOTTOM）、网格HORIZONTAL（TOP_TO_BOTTOM）
if (vBottom < center)
t.nearestListId = data.id;
break;
case 4://单列VERTICAL（BOTTOM_TO_TOP）、网格HORIZONTAL（BOTTOM_TO_TOP）
if (vTop > center)
t.nearestListId = data.id;
break;
}
}
// cc.log('t.nearestListId =', t.nearestListId);
}
//上一页
prePage(timeInSecond: number = .5) {
// cc.log('👈');
if (!this.checkInited())
return;
this.skipPage(this.curPageNum - 1, timeInSecond);
}
//下一页
nextPage(timeInSecond: number = .5) {
// cc.log('👉');
if (!this.checkInited())
return;
this.skipPage(this.curPageNum + 1, timeInSecond);
}
//跳转到第几页
skipPage(pageNum: number, timeInSecond: number) {
let t: any = this;
if (!t.checkInited())
return;
if (t._slideMode != SlideType.PAGE)
return console.error('This function is not allowed to be called, Must SlideMode = PAGE!');
if (pageNum < 0 || pageNum >= t._numItems)
return;
if (t.curPageNum == pageNum)
return;
// cc.log(pageNum);
t.curPageNum = pageNum;
if (t.pageChangeEvent) {
EventHandler.emitEvents([t.pageChangeEvent], pageNum);
}
t.scrollTo(pageNum, timeInSecond);
}
//计算 CustomSize（这个函数还是保留吧，某些罕见的情况的确还是需要手动计算customSize的）
calcCustomSize(numItems: number) {
let t: any = this;
if (!t.checkInited())
return;
if (!t._itemTmp)
return console.error('Unset template item!');
if (!t.renderEvent)
return console.error('Unset Render-Event!');
t._customSize = {};
let temp: any = instantiate(t._itemTmp);
let ut: UITransform = temp.getComponent(UITransform);
t.content.addChild(temp);
for (let n: number = 0; n < numItems; n++) {
EventHandler.emitEvents([t.renderEvent], temp, n);
if (ut.height != t._itemSize.height || ut.width != t._itemSize.width) {
t._customSize[n] = t._sizeType ? ut.height : ut.width;
}
}
if (!Object.keys(t._customSize).length)
t._customSize = null;
temp.removeFromParent();
if (temp.destroy)
temp.destroy();
return t._customSize;
}
}
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