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virtuallist

master
guy 8 years ago
parent
2ae5235b79
commit
546087ba62
5 changed files with 233 additions and 188 deletions
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  1. 135
      bi/base.js
  2. 8
      demo/js/core/abstract/demo.virtual_list.js
  3. 135
      docs/base.js
  4. 8
      docs/demo.js
  5. 135
      src/base/list/virtuallist.js

135
bi/base.js
Unescape View File

@ -15476,6 +15476,10 @@ BI.VirtualList = BI.inherit(BI.Widget, {
init: function () { init: function () {
this.renderedIndex = -1; this.renderedIndex = -1;
this.cache = {}; this.cache = {};
this._scrollLock = false;
this._debounceRelease = BI.debounce(function () {
self._scrollLock = false;
}, 1000 / 60);
}, },
render: function () { render: function () {
@ -15511,23 +15515,27 @@ BI.VirtualList = BI.inherit(BI.Widget, {
self._calculateBlocksToRender(); self._calculateBlocksToRender();
}); });
BI.ResizeDetector.addResizeListener(this, function () { BI.ResizeDetector.addResizeListener(this, function () {
self._renderMoreIf(); self._calculateBlocksToRender();
}); });
}, },
_renderMoreIf: function () { _renderMoreIf: function () {
var o = this.options; var self = this, o = this.options;
var height = this.element.height(); var height = this.element.height();
var minContentHeight = o.scrollTop + height + o.overscanHeight; var minContentHeight = o.scrollTop + height + o.overscanHeight;
var index = (this.cache[this.renderedIndex] && (this.cache[this.renderedIndex].index + o.blockSize)) || 0, var index = (this.cache[this.renderedIndex] && (this.cache[this.renderedIndex].index + o.blockSize)) || 0,
cnt = this.renderedIndex + 1; cnt = this.renderedIndex + 1;
var lastHeight; var lastHeight;
while ((lastHeight = this.container.element.height()) < minContentHeight && index < o.items.length) { var getElementHeight = function () {
return self.container.element.height() + self.topBlank.element.height() + self.bottomBlank.element.height();
};
while ((lastHeight = getElementHeight()) < minContentHeight && index < o.items.length) {
var items = o.items.slice(index, index + o.blockSize); var items = o.items.slice(index, index + o.blockSize);
this.container.addItems(items); this.container.addItems(items);
var addedHeight = this.container.element.height() - lastHeight; var addedHeight = getElementHeight() - lastHeight;
this.cache[cnt] = { this.cache[cnt] = {
index: index, index: index,
scrollTop: lastHeight,
height: addedHeight height: addedHeight
}; };
this.tree.set(cnt, addedHeight); this.tree.set(cnt, addedHeight);
@ -15540,66 +15548,69 @@ BI.VirtualList = BI.inherit(BI.Widget, {
_calculateBlocksToRender: function () { _calculateBlocksToRender: function () {
var o = this.options; var o = this.options;
this._renderMoreIf(); this._renderMoreIf();
// var height = this.element.height(); var height = this.element.height();
// var minContentHeightFrom = o.scrollTop - o.overscanHeight; var minContentHeightFrom = o.scrollTop - o.overscanHeight;
// var minContentHeightTo = o.scrollTop + height + o.overscanHeight; var minContentHeightTo = o.scrollTop + height + o.overscanHeight;
// var start = this.tree.greatestLowerBound(minContentHeightFrom); var start = this.tree.greatestLowerBound(minContentHeightFrom);
// var end = this.tree.leastUpperBound(minContentHeightTo); var end = this.tree.leastUpperBound(minContentHeightTo);
// var summaryTopHeight = 0;
// this.topBlank.setHeight(0); // this.topBlank.setHeight(0);
// this.bottomBlank.setHeight(0); // this.bottomBlank.setHeight(0);
// var needDestroyed = []; var needDestroyed = [];
// for (var i = 0; i < start; i++) { for (var i = 0; i < start; i++) {
// var index = this.cache[i].index; var index = this.cache[i].index;
// summaryTopHeight += this.cache[i].height; if (!this.cache[i].destroyed) {
// if (!this.cache[i].destroyed) { for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { needDestroyed.push(this.container._children[j]);
// needDestroyed.push(this.container._children[j]); this.container._children[j] = null;
// this.container._children[j] = null; }
// } this.cache[i].destroyed = true;
// this.cache[i].destroyed = true; }
// // this.topBlank.setHeight(summaryTopHeight); }
// } for (var i = end + 1; i <= this.renderedIndex; i++) {
// } var index = this.cache[i].index;
// summaryTopHeight = 0; if (!this.cache[i].destroyed) {
// for (var i = end + 1; i <= this.renderedIndex; i++) { for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// var index = this.cache[i].index; needDestroyed.push(this.container._children[j]);
// summaryTopHeight += this.cache[i].height; this.container._children[j] = null;
// if (!this.cache[i].destroyed) { }
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { this.cache[i].destroyed = true;
// needDestroyed.push(this.container._children[j]); }
// this.container._children[j] = null; }
// } var firstFragment = document.createDocumentFragment(), lastFragment = document.createDocumentFragment();
// this.cache[i].destroyed = true; var currentFragment = firstFragment;
// // this.bottomBlank.setHeight(summaryTopHeight); for (var i = (start < 0 ? 0 : start); i <= end && i <= this.renderedIndex; i++) {
// } var index = this.cache[i].index;
// } if (!this.cache[i].destroyed) {
// var firstFragment = document.createDocumentFragment(), lastFragment = document.createDocumentFragment(); currentFragment = lastFragment;
// var currentFragment = firstFragment; }
// for (var i = (start < 0 ? 0 : start); i <= end && i <= this.renderedIndex; i++) { if (this.cache[i].destroyed === true) {
// var index = this.cache[i].index; for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// if (!this.cache[i].destroyed) { var w = this.container._children[j] = BI.createWidget(BI.extend({
// currentFragment = lastFragment; root: true
// } }, BI.stripEL(o.items[j])));
// if (this.cache[i].destroyed === true) { w.element.css("position", "relative");//vertical布局下position要改成relative
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { currentFragment.appendChild(w.element[0]);
// var w = this.container._children[j] = BI.createWidget(BI.extend({ }
// root: true this.cache[i].destroyed = false;
// }, BI.stripEL(o.items[j]))); }
// currentFragment.appendChild(w.element[0]); }
// } this._scrollLock = true;
// this.cache[i].destroyed = false; this.container.element.prepend(firstFragment);
// } this.container.element.append(lastFragment);
// } this.topBlank.setHeight(this.cache[start < 0 ? 0 : start].scrollTop);
// this.container.element.prepend(firstFragment); var lastCache = this.cache[Math.min(end, this.renderedIndex)];
// this.container.element.append(lastFragment); this.bottomBlank.setHeight(this.tree.sumTo(this.renderedIndex) - lastCache.scrollTop - lastCache.height);
// BI.each(needDestroyed, function (i, child) { BI.each(needDestroyed, function (i, child) {
// child && child._destroy(); child && child._destroy();
// }); });
this._debounceRelease();
}, },
_populate: function () { _populate: function (items) {
var o = this.options; var o = this.options;
if (items && this.options.items !== items) {
this.options.items = items;
}
this.tree = BI.PrefixIntervalTree.empty(Math.ceil(o.items.length / o.blockSize)); this.tree = BI.PrefixIntervalTree.empty(Math.ceil(o.items.length / o.blockSize));
this._calculateBlocksToRender(); this._calculateBlocksToRender();
this.element.scrollTop(o.scrollTop); this.element.scrollTop(o.scrollTop);
@ -15611,7 +15622,10 @@ BI.VirtualList = BI.inherit(BI.Widget, {
}, },
populate: function (items) { populate: function (items) {
if (items && this.options.items !== items) {
this.restore();
}
this._populate();
}, },
destroyed: function () { destroyed: function () {
@ -15619,6 +15633,7 @@ BI.VirtualList = BI.inherit(BI.Widget, {
} }
}); });
BI.shortcut('bi.virtual_list', BI.VirtualList); BI.shortcut('bi.virtual_list', BI.VirtualList);
/** /**
* 分页控件 * 分页控件
* *

8
demo/js/core/abstract/demo.virtual_list.js
Unescape View File

@ -5,12 +5,12 @@ Demo.Func = BI.inherit(BI.Widget, {
render: function () { render: function () {
return { return {
type: "bi.virtual_list", type: "bi.virtual_list",
items: BI.map(BI.makeArray(200, 0), function (i, item) { items: BI.map(Demo.CONSTANTS.ITEMS, function (i, item) {
return { return BI.extend({}, item, {
type: "bi.label", type: "bi.label",
height: 30, height: 30,
text: i text: (i + 1) + "." + item.text,
}; });
}) })
} }
} }

135
docs/base.js
Unescape View File

@ -15476,6 +15476,10 @@ BI.VirtualList = BI.inherit(BI.Widget, {
init: function () { init: function () {
this.renderedIndex = -1; this.renderedIndex = -1;
this.cache = {}; this.cache = {};
this._scrollLock = false;
this._debounceRelease = BI.debounce(function () {
self._scrollLock = false;
}, 1000 / 60);
}, },
render: function () { render: function () {
@ -15511,23 +15515,27 @@ BI.VirtualList = BI.inherit(BI.Widget, {
self._calculateBlocksToRender(); self._calculateBlocksToRender();
}); });
BI.ResizeDetector.addResizeListener(this, function () { BI.ResizeDetector.addResizeListener(this, function () {
self._renderMoreIf(); self._calculateBlocksToRender();
}); });
}, },
_renderMoreIf: function () { _renderMoreIf: function () {
var o = this.options; var self = this, o = this.options;
var height = this.element.height(); var height = this.element.height();
var minContentHeight = o.scrollTop + height + o.overscanHeight; var minContentHeight = o.scrollTop + height + o.overscanHeight;
var index = (this.cache[this.renderedIndex] && (this.cache[this.renderedIndex].index + o.blockSize)) || 0, var index = (this.cache[this.renderedIndex] && (this.cache[this.renderedIndex].index + o.blockSize)) || 0,
cnt = this.renderedIndex + 1; cnt = this.renderedIndex + 1;
var lastHeight; var lastHeight;
while ((lastHeight = this.container.element.height()) < minContentHeight && index < o.items.length) { var getElementHeight = function () {
return self.container.element.height() + self.topBlank.element.height() + self.bottomBlank.element.height();
};
while ((lastHeight = getElementHeight()) < minContentHeight && index < o.items.length) {
var items = o.items.slice(index, index + o.blockSize); var items = o.items.slice(index, index + o.blockSize);
this.container.addItems(items); this.container.addItems(items);
var addedHeight = this.container.element.height() - lastHeight; var addedHeight = getElementHeight() - lastHeight;
this.cache[cnt] = { this.cache[cnt] = {
index: index, index: index,
scrollTop: lastHeight,
height: addedHeight height: addedHeight
}; };
this.tree.set(cnt, addedHeight); this.tree.set(cnt, addedHeight);
@ -15540,66 +15548,69 @@ BI.VirtualList = BI.inherit(BI.Widget, {
_calculateBlocksToRender: function () { _calculateBlocksToRender: function () {
var o = this.options; var o = this.options;
this._renderMoreIf(); this._renderMoreIf();
// var height = this.element.height(); var height = this.element.height();
// var minContentHeightFrom = o.scrollTop - o.overscanHeight; var minContentHeightFrom = o.scrollTop - o.overscanHeight;
// var minContentHeightTo = o.scrollTop + height + o.overscanHeight; var minContentHeightTo = o.scrollTop + height + o.overscanHeight;
// var start = this.tree.greatestLowerBound(minContentHeightFrom); var start = this.tree.greatestLowerBound(minContentHeightFrom);
// var end = this.tree.leastUpperBound(minContentHeightTo); var end = this.tree.leastUpperBound(minContentHeightTo);
// var summaryTopHeight = 0;
// this.topBlank.setHeight(0); // this.topBlank.setHeight(0);
// this.bottomBlank.setHeight(0); // this.bottomBlank.setHeight(0);
// var needDestroyed = []; var needDestroyed = [];
// for (var i = 0; i < start; i++) { for (var i = 0; i < start; i++) {
// var index = this.cache[i].index; var index = this.cache[i].index;
// summaryTopHeight += this.cache[i].height; if (!this.cache[i].destroyed) {
// if (!this.cache[i].destroyed) { for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { needDestroyed.push(this.container._children[j]);
// needDestroyed.push(this.container._children[j]); this.container._children[j] = null;
// this.container._children[j] = null; }
// } this.cache[i].destroyed = true;
// this.cache[i].destroyed = true; }
// // this.topBlank.setHeight(summaryTopHeight); }
// } for (var i = end + 1; i <= this.renderedIndex; i++) {
// } var index = this.cache[i].index;
// summaryTopHeight = 0; if (!this.cache[i].destroyed) {
// for (var i = end + 1; i <= this.renderedIndex; i++) { for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// var index = this.cache[i].index; needDestroyed.push(this.container._children[j]);
// summaryTopHeight += this.cache[i].height; this.container._children[j] = null;
// if (!this.cache[i].destroyed) { }
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { this.cache[i].destroyed = true;
// needDestroyed.push(this.container._children[j]); }
// this.container._children[j] = null; }
// } var firstFragment = document.createDocumentFragment(), lastFragment = document.createDocumentFragment();
// this.cache[i].destroyed = true; var currentFragment = firstFragment;
// // this.bottomBlank.setHeight(summaryTopHeight); for (var i = (start < 0 ? 0 : start); i <= end && i <= this.renderedIndex; i++) {
// } var index = this.cache[i].index;
// } if (!this.cache[i].destroyed) {
// var firstFragment = document.createDocumentFragment(), lastFragment = document.createDocumentFragment(); currentFragment = lastFragment;
// var currentFragment = firstFragment; }
// for (var i = (start < 0 ? 0 : start); i <= end && i <= this.renderedIndex; i++) { if (this.cache[i].destroyed === true) {
// var index = this.cache[i].index; for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// if (!this.cache[i].destroyed) { var w = this.container._children[j] = BI.createWidget(BI.extend({
// currentFragment = lastFragment; root: true
// } }, BI.stripEL(o.items[j])));
// if (this.cache[i].destroyed === true) { w.element.css("position", "relative");//vertical布局下position要改成relative
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { currentFragment.appendChild(w.element[0]);
// var w = this.container._children[j] = BI.createWidget(BI.extend({ }
// root: true this.cache[i].destroyed = false;
// }, BI.stripEL(o.items[j]))); }
// currentFragment.appendChild(w.element[0]); }
// } this._scrollLock = true;
// this.cache[i].destroyed = false; this.container.element.prepend(firstFragment);
// } this.container.element.append(lastFragment);
// } this.topBlank.setHeight(this.cache[start < 0 ? 0 : start].scrollTop);
// this.container.element.prepend(firstFragment); var lastCache = this.cache[Math.min(end, this.renderedIndex)];
// this.container.element.append(lastFragment); this.bottomBlank.setHeight(this.tree.sumTo(this.renderedIndex) - lastCache.scrollTop - lastCache.height);
// BI.each(needDestroyed, function (i, child) { BI.each(needDestroyed, function (i, child) {
// child && child._destroy(); child && child._destroy();
// }); });
this._debounceRelease();
}, },
_populate: function () { _populate: function (items) {
var o = this.options; var o = this.options;
if (items && this.options.items !== items) {
this.options.items = items;
}
this.tree = BI.PrefixIntervalTree.empty(Math.ceil(o.items.length / o.blockSize)); this.tree = BI.PrefixIntervalTree.empty(Math.ceil(o.items.length / o.blockSize));
this._calculateBlocksToRender(); this._calculateBlocksToRender();
this.element.scrollTop(o.scrollTop); this.element.scrollTop(o.scrollTop);
@ -15611,7 +15622,10 @@ BI.VirtualList = BI.inherit(BI.Widget, {
}, },
populate: function (items) { populate: function (items) {
if (items && this.options.items !== items) {
this.restore();
}
this._populate();
}, },
destroyed: function () { destroyed: function () {
@ -15619,6 +15633,7 @@ BI.VirtualList = BI.inherit(BI.Widget, {
} }
}); });
BI.shortcut('bi.virtual_list', BI.VirtualList); BI.shortcut('bi.virtual_list', BI.VirtualList);
/** /**
* 分页控件 * 分页控件
* *

8
docs/demo.js
Unescape View File

@ -3489,12 +3489,12 @@ BI.shortcut("demo.virtual_group_item", Demo.Item);Demo.Func = BI.inherit(BI.Widg
render: function () { render: function () {
return { return {
type: "bi.virtual_list", type: "bi.virtual_list",
items: BI.map(BI.makeArray(200, 0), function (i, item) { items: BI.map(Demo.CONSTANTS.ITEMS, function (i, item) {
return { return BI.extend({}, item, {
type: "bi.label", type: "bi.label",
height: 30, height: 30,
text: i text: (i + 1) + "." + item.text,
}; });
}) })
} }
} }

135
src/base/list/virtuallist.js
Unescape View File

@ -19,6 +19,10 @@ BI.VirtualList = BI.inherit(BI.Widget, {
init: function () { init: function () {
this.renderedIndex = -1; this.renderedIndex = -1;
this.cache = {}; this.cache = {};
this._scrollLock = false;
this._debounceRelease = BI.debounce(function () {
self._scrollLock = false;
}, 1000 / 60);
}, },
render: function () { render: function () {
@ -54,23 +58,27 @@ BI.VirtualList = BI.inherit(BI.Widget, {
self._calculateBlocksToRender(); self._calculateBlocksToRender();
}); });
BI.ResizeDetector.addResizeListener(this, function () { BI.ResizeDetector.addResizeListener(this, function () {
self._renderMoreIf(); self._calculateBlocksToRender();
}); });
}, },
_renderMoreIf: function () { _renderMoreIf: function () {
var o = this.options; var self = this, o = this.options;
var height = this.element.height(); var height = this.element.height();
var minContentHeight = o.scrollTop + height + o.overscanHeight; var minContentHeight = o.scrollTop + height + o.overscanHeight;
var index = (this.cache[this.renderedIndex] && (this.cache[this.renderedIndex].index + o.blockSize)) || 0, var index = (this.cache[this.renderedIndex] && (this.cache[this.renderedIndex].index + o.blockSize)) || 0,
cnt = this.renderedIndex + 1; cnt = this.renderedIndex + 1;
var lastHeight; var lastHeight;
while ((lastHeight = this.container.element.height()) < minContentHeight && index < o.items.length) { var getElementHeight = function () {
return self.container.element.height() + self.topBlank.element.height() + self.bottomBlank.element.height();
};
while ((lastHeight = getElementHeight()) < minContentHeight && index < o.items.length) {
var items = o.items.slice(index, index + o.blockSize); var items = o.items.slice(index, index + o.blockSize);
this.container.addItems(items); this.container.addItems(items);
var addedHeight = this.container.element.height() - lastHeight; var addedHeight = getElementHeight() - lastHeight;
this.cache[cnt] = { this.cache[cnt] = {
index: index, index: index,
scrollTop: lastHeight,
height: addedHeight height: addedHeight
}; };
this.tree.set(cnt, addedHeight); this.tree.set(cnt, addedHeight);
@ -83,66 +91,69 @@ BI.VirtualList = BI.inherit(BI.Widget, {
_calculateBlocksToRender: function () { _calculateBlocksToRender: function () {
var o = this.options; var o = this.options;
this._renderMoreIf(); this._renderMoreIf();
// var height = this.element.height(); var height = this.element.height();
// var minContentHeightFrom = o.scrollTop - o.overscanHeight; var minContentHeightFrom = o.scrollTop - o.overscanHeight;
// var minContentHeightTo = o.scrollTop + height + o.overscanHeight; var minContentHeightTo = o.scrollTop + height + o.overscanHeight;
// var start = this.tree.greatestLowerBound(minContentHeightFrom); var start = this.tree.greatestLowerBound(minContentHeightFrom);
// var end = this.tree.leastUpperBound(minContentHeightTo); var end = this.tree.leastUpperBound(minContentHeightTo);
// var summaryTopHeight = 0;
// this.topBlank.setHeight(0); // this.topBlank.setHeight(0);
// this.bottomBlank.setHeight(0); // this.bottomBlank.setHeight(0);
// var needDestroyed = []; var needDestroyed = [];
// for (var i = 0; i < start; i++) { for (var i = 0; i < start; i++) {
// var index = this.cache[i].index; var index = this.cache[i].index;
// summaryTopHeight += this.cache[i].height; if (!this.cache[i].destroyed) {
// if (!this.cache[i].destroyed) { for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { needDestroyed.push(this.container._children[j]);
// needDestroyed.push(this.container._children[j]); this.container._children[j] = null;
// this.container._children[j] = null; }
// } this.cache[i].destroyed = true;
// this.cache[i].destroyed = true; }
// // this.topBlank.setHeight(summaryTopHeight); }
// } for (var i = end + 1; i <= this.renderedIndex; i++) {
// } var index = this.cache[i].index;
// summaryTopHeight = 0; if (!this.cache[i].destroyed) {
// for (var i = end + 1; i <= this.renderedIndex; i++) { for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// var index = this.cache[i].index; needDestroyed.push(this.container._children[j]);
// summaryTopHeight += this.cache[i].height; this.container._children[j] = null;
// if (!this.cache[i].destroyed) { }
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { this.cache[i].destroyed = true;
// needDestroyed.push(this.container._children[j]); }
// this.container._children[j] = null; }
// } var firstFragment = document.createDocumentFragment(), lastFragment = document.createDocumentFragment();
// this.cache[i].destroyed = true; var currentFragment = firstFragment;
// // this.bottomBlank.setHeight(summaryTopHeight); for (var i = (start < 0 ? 0 : start); i <= end && i <= this.renderedIndex; i++) {
// } var index = this.cache[i].index;
// } if (!this.cache[i].destroyed) {
// var firstFragment = document.createDocumentFragment(), lastFragment = document.createDocumentFragment(); currentFragment = lastFragment;
// var currentFragment = firstFragment; }
// for (var i = (start < 0 ? 0 : start); i <= end && i <= this.renderedIndex; i++) { if (this.cache[i].destroyed === true) {
// var index = this.cache[i].index; for (var j = index; j < index + o.blockSize && j < o.items.length; j++) {
// if (!this.cache[i].destroyed) { var w = this.container._children[j] = BI.createWidget(BI.extend({
// currentFragment = lastFragment; root: true
// } }, BI.stripEL(o.items[j])));
// if (this.cache[i].destroyed === true) { w.element.css("position", "relative");//vertical布局下position要改成relative
// for (var j = index; j < index + o.blockSize && j < o.items.length; j++) { currentFragment.appendChild(w.element[0]);
// var w = this.container._children[j] = BI.createWidget(BI.extend({ }
// root: true this.cache[i].destroyed = false;
// }, BI.stripEL(o.items[j]))); }
// currentFragment.appendChild(w.element[0]); }
// } this._scrollLock = true;
// this.cache[i].destroyed = false; this.container.element.prepend(firstFragment);
// } this.container.element.append(lastFragment);
// } this.topBlank.setHeight(this.cache[start < 0 ? 0 : start].scrollTop);
// this.container.element.prepend(firstFragment); var lastCache = this.cache[Math.min(end, this.renderedIndex)];
// this.container.element.append(lastFragment); this.bottomBlank.setHeight(this.tree.sumTo(this.renderedIndex) - lastCache.scrollTop - lastCache.height);
// BI.each(needDestroyed, function (i, child) { BI.each(needDestroyed, function (i, child) {
// child && child._destroy(); child && child._destroy();
// }); });
this._debounceRelease();
}, },
_populate: function () { _populate: function (items) {
var o = this.options; var o = this.options;
if (items && this.options.items !== items) {
this.options.items = items;
}
this.tree = BI.PrefixIntervalTree.empty(Math.ceil(o.items.length / o.blockSize)); this.tree = BI.PrefixIntervalTree.empty(Math.ceil(o.items.length / o.blockSize));
this._calculateBlocksToRender(); this._calculateBlocksToRender();
this.element.scrollTop(o.scrollTop); this.element.scrollTop(o.scrollTop);
@ -154,7 +165,10 @@ BI.VirtualList = BI.inherit(BI.Widget, {
}, },
populate: function (items) { populate: function (items) {
if (items && this.options.items !== items) {
this.restore();
}
this._populate();
}, },
destroyed: function () { destroyed: function () {
@ -162,3 +176,4 @@ BI.VirtualList = BI.inherit(BI.Widget, {
} }
}); });
BI.shortcut('bi.virtual_list', BI.VirtualList); BI.shortcut('bi.virtual_list', BI.VirtualList);

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