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BI-47755 fix: virtual_list先滚动在populate报错

es6
windy 5 years ago
parent
commit
76534263f9
  1. 3
      src/base/grid/grid.js
  2. 5
      src/base/list/virtuallist.js
  3. 5
      src/core/utils/prefixIntervalTree.js

3
src/base/grid/grid.js

@ -208,7 +208,8 @@ BI.GridView = BI.inherit(BI.Widget, {
BI.each(addSet, function (index, key) { BI.each(addSet, function (index, key) {
addedItems.push(renderedCells[key[2]]); addedItems.push(renderedCells[key[2]]);
}); });
this.container.addItems(addedItems); // 与listview一样, 给上下文
this.container.addItems(addedItems, this);
// 拦截父子级关系 // 拦截父子级关系
this.container._children = renderedWidgets; this.container._children = renderedWidgets;
this.container.attr("items", renderedCells); this.container.attr("items", renderedCells);

5
src/base/list/virtuallist.js

@ -151,7 +151,7 @@ BI.VirtualList = BI.inherit(BI.Widget, {
_clearChildren: function () { _clearChildren: function () {
BI.each(this.container._children, function (i, cell) { BI.each(this.container._children, function (i, cell) {
cell && cell.el._destroy(); cell && cell._destroy();
}); });
this.container._children = {}; this.container._children = {};
this.container.attr("items", []); this.container.attr("items", []);
@ -162,6 +162,9 @@ BI.VirtualList = BI.inherit(BI.Widget, {
this._clearChildren(); this._clearChildren();
this.cache = {}; this.cache = {};
this.options.scrollTop = 0; this.options.scrollTop = 0;
// 依赖于cache的占位元素也要初始化
this.topBlank.setHeight(0);
this.bottomBlank.setHeight(0);
}, },
populate: function (items) { populate: function (items) {

5
src/core/utils/prefixIntervalTree.js

@ -23,13 +23,15 @@
BI.PrefixIntervalTree = function (xs) { BI.PrefixIntervalTree = function (xs) {
this._size = xs.length; this._size = xs.length;
this._half = ceilLog2(this._size); this._half = ceilLog2(this._size);
// _heap是一个_size两倍以上的堆
this._heap = new Int32Array(2 * this._half); this._heap = new Int32Array(2 * this._half);
var i; var i;
// 初始化 >= _size 的堆空间, 即叶子节点
for (i = 0; i < this._size; ++i) { for (i = 0; i < this._size; ++i) {
this._heap[this._half + i] = xs[i]; this._heap[this._half + i] = xs[i];
} }
// 初始化 < _size 的堆空间, 即非叶子节点,根节点包含整个区间
for (i = this._half - 1; i > 0; --i) { for (i = this._half - 1; i > 0; --i) {
this._heap[i] = this._heap[2 * i] + this._heap[2 * i + 1]; this._heap[i] = this._heap[2 * i] + this._heap[2 * i + 1];
} }
@ -37,6 +39,7 @@
BI.PrefixIntervalTree.prototype = { BI.PrefixIntervalTree.prototype = {
constructor: BI.PrefixIntervalTree, constructor: BI.PrefixIntervalTree,
// 往_half之后的空间set值,需要更新其所有祖先节点的值
set: function (index, value) { set: function (index, value) {
var node = this._half + index; var node = this._half + index;
this._heap[node] = value; this._heap[node] = value;

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