Flex 高级数据网格

发布于 2024-11-16 16:57:42 字数 654 浏览 3 评论 0原文

我的 Flex 应用程序中有一个 AdvancedDatagrid。

<mx:AdvancedDataGrid id="reportGrid" creationComplete="groupedData.refresh()" width="100%" height="100%" variableRowHeight="true">
                    <mx:dataProvider>
                        <mx:GroupingCollection2 id="groupedData" source="{reportData}"/>
                    </mx:dataProvider>
                </mx:AdvancedDataGrid>

我将列、分组和摘要动态分配给 groupedData GroupingCollection2。当我过滤数据源并调用 groupedData.refresh() 时，网格刷新正常。但是，当我加载数据并且不应用分组（不向 GroupingCollection2 添加分组）时，groupedData.Refresh() 不会更新网格以仅显示行中筛选的内容。我也尝试过调用网格自己的InvalidateList()，但无济于事。

原文

I have an AdvancedDatagrid in my Flex application.

<mx:AdvancedDataGrid id="reportGrid" creationComplete="groupedData.refresh()" width="100%" height="100%" variableRowHeight="true">
                    <mx:dataProvider>
                        <mx:GroupingCollection2 id="groupedData" source="{reportData}"/>
                    </mx:dataProvider>
                </mx:AdvancedDataGrid>

I dynamically assign columns and grouping and summaries to groupedData GroupingCollection2.
When I filter the datasource and call groupedData.refresh() the grid refreshes fine. But when I load data, and apply no grouping (add no groupings to the GroupingCollection2), the groupedData.Refresh() does not update the grid to show only the filtered in rows. I have also tried calling the grid's own InvalidateList(), to no avail.

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一人独醉 2024-11-23 16:57:42

谢谢你的建议。

我查看了 GroupingCollection2.as 的内部：

// return if no grouping or groupingFields are supplied
        if (!grouping || grouping.fields.length < 1 )
        {
            super.source = source;
            // dispatch collection change event of kind reset.
            resetEvent =
                    new CollectionEvent(CollectionEvent.COLLECTION_CHANGE);
            resetEvent.kind = CollectionEventKind.RESET;
            dispatchEvent(resetEvent);
            return true;
        }

因此，出于某种原因，如果没有分组，Adobe 会重置数据源
上，（在我看来）这是一个错误，或者是一个错误的假设。

上面的代码在调用groupingCollection.refresh()时被调用，
这是刷新 AdvancedDataGrid 上显示的唯一方法（据我所知）

因此，我认为解决方法是始终至少有 1 个分组
在AdvancedDataGrid上。不过，有点不受欢迎的限制。

Thanks for the suggestion.

I looked inside the GroupingCollection2.as:

// return if no grouping or groupingFields are supplied
        if (!grouping || grouping.fields.length < 1 )
        {
            super.source = source;
            // dispatch collection change event of kind reset.
            resetEvent =
                    new CollectionEvent(CollectionEvent.COLLECTION_CHANGE);
            resetEvent.kind = CollectionEventKind.RESET;
            dispatchEvent(resetEvent);
            return true;
        }

So for some reason Adobe does reset the dataSource if there is no grouping
on, which (in my opinion) is a bug, or a bad assumption.

The code above gets called when calling the groupingCollection.refresh(),
which is the only way of refreshing the display on the AdvancedDataGrid (that I am aware of)

So, I presume a workaround would be to always have at least 1 grouping
on the AdvancedDataGrid. A bit of an undesirable restriction, though.

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故事↓在人 2024-11-23 16:57:42

我猜测发生这种情况是因为加载数据时应用于旧 ArrayCollection 的 filterFunction 被清除。我要做的是复制旧的 ArrayCollection 的 filterFunction （以及 Sort 如果需要的话），然后在加载数据后重新分配这些属性。

这是一个快速（且未经测试）的示例：

public function loadData(myData:ArrayCollection):void
{
  var filter:Function = reportData.filterFunction;
  reportData = myData;
  reportData.filterFunction = filter;
  reportData.refresh();
}

My guess is this is happening because the filterFunction that was being applied to the old ArrayCollection is getting wiped out when the data gets loaded. What I would do is make a copy of the old ArrayCollection's filterFunction (and Sort if needed) and then reassign those properties once the data has been loaded.

Here's a quick (and untested) example:

public function loadData(myData:ArrayCollection):void
{
  var filter:Function = reportData.filterFunction;
  reportData = myData;
  reportData.filterFunction = filter;
  reportData.refresh();
}

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