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datagrid custom itemrenderer sorting
Author: Yuliang Ruan
Short Link: http://www.houseoffusion.com/groups/flex/thread.cfm/threadid:2054#6266
Ok I have a somewhat complicate datagrid renderer set up.
I have a custom component with 2 datagrids: headerDisplay, container. both tied
to same dataProvider.
headerDisplay only shows the header, none of the data rows
container shows 1 column dataProvider.length number of rows, with a custom
itemRenderer myItemRenderer that is also passed the dataProvider
myItemRenderer has 2datagrids. headerData and detailData. headerData just
shows each field and row of the dataProvider. detailData ties off one of the
fields in the dataProvider that I created, call it detailData_provider. this
detailData is normally collapsed, it can be exploded. detailData is
exploded/collapsed by using visible and showInLayout properties of the datagrid
component
what this creates is basically a display for any typical data model where you
have parent datas and child datas to each parent. kind of like datagrid tree.
anyway, my problem is this. when i have row1 exploded, I see row1's headerData,
row1's detailData, row2's headerData, row3's headerData, row4's headerData.
while exploded, i click on the headerDisplay's column header, invoking a sort of
the dataProvider. it sorts by ascending order, which happens to keep data in
place cause i'm using dummy data that's just 1,2,3,4,5.
i click headerDisplay column header again to inverse sort...oh boy.
row4 header, row3 header row3 detail, row2 header, row1 header.
click again, normal sort
row1 header, row2 header, row3 header, row3 detail, row4 header
click again, inverse sort
row4 header, row3 header, row2 header, row1 header row1 detail.
click again, normal sort
row1 header, row2 header, row3 header, row4 header no detail shows at all
it seems like the visible&showInLayout is not following the dataProvider
record....but it's not staying with the dataGrid's row either. it moved one row
down for each click of the inversion of sorting, to disappear entirely and then
restarts the cycle.
i have not touched the sorting functions of datagrid class at all. i'm just
baffled on how this sorting thing works.
TIA
yuliang
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February 08, 2012
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