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From Oleg Konovalov <oleg...@gmail.com>
Subject Re: Building Spark DataGrid dynamically
Date Fri, 26 Jul 2013 01:20:59 GMT
Yes, it fixed that exception:   arrCol.source=new Array( { "" : ""} );

Any suggestions how to resolve items 2 & 3 (show columns in original order
and implement VDividerBox when second datagrid populated dynamically) ?


On Thu, Jul 25, 2013 at 2:21 PM, Maurice Amsellem <
maurice.amsellem@systar.com> wrote:

> Here is a possible workaround:
>
> Instead of clearing the DG (which anyway wouldn't look very nice), what
> about setting it to one single empty column ( that is : GridColumn
> headerText= " " and dataField="_nonExistingField_" ) .
> That way, it still looks like a datagrid, although empty and it probably
> won't break.
>
> What do you think?
>
> Maurice
>
>
> -----Message d'origine-----
> De : Oleg Konovalov [mailto:olegkon@gmail.com]
> Envoyé : jeudi 25 juillet 2013 20:12
> À : users@flex.apache.org
> Objet : Re: Building Spark DataGrid dynamically
>
> No, it is Clients code, I can't post it. I am getting data dynamically via
> SOAP, convert it to Vector of Objects, then to ArrayCollection, and pass it
> to Spark DG dataprovider. Datagrid is declared in MXML without any columns.
> That's it. But as I said, can't clear that AC. Any idea how to avoid that
> Null Reference?
> On Jul 25, 2013 8:16 AM, "Martin Miko" <marrtinmiko@gmail.com> wrote:
>
> > Could you post a code sample? I've seen many strange things, but you
> > must be doing something really funny there.
> >
> >
> > On Thu, Jul 25, 2013 at 1:39 PM, Oleg Konovalov <olegkon@gmail.com>
> wrote:
> >
> > > Full exception trace with numbers:
> > >
> > > TypeError: Error #1009: Cannot access a property or method of a null
> > object
> > > reference.
> > >
> > >           at
> > > spark.components.gridClasses::GridLayout/updateTypicalCellSizes()[E:
> > > \
> > > dev\4.5.1\frameworks\projects\spark\src\spark\components\gridClasses
> > > \G
> > > ridLayout.as:867]
> > >
> > >           at
> > > spark.components.gridClasses::GridLayout/measure()[E:\dev\4.5.1\fram
> > > e
> > > works\projects\spark\src\spark\components\gridClasses\GridLayout.as:
> > > 44 4]
> > >
> > >           at
> > > spark.components.supportClasses::GroupBase/measure()[E:\dev\4.5.1\fr
> > > a
> > > meworks\projects\spark\src\spark\components\supportClasses\GroupBase
> > > .a
> > > s:1148]
> > >
> > >           at
> > > mx.core::UIComponent/measureSizes()[E:\dev\4.5.1\frameworks\projects
> > > \ framework\src\mx\core\UIComponent.as:8496]
> > >
> > >           at
> > > mx.core::UIComponent/validateSize()[E:\dev\4.5.1\frameworks\projects
> > > \ framework\src\mx\core\UIComponent.as:8420]
> > >
> > >           at
> > > spark.components::Group/validateSize()[E:\dev\4.5.1\frameworks\proje
> > > c ts\spark\src\spark\components\Group.as:1012]
> > >
> > >           at
> > > mx.managers::LayoutManager/validateSize()[E:\dev\4.5.1\frameworks\pr
> > > o jects\framework\src\mx\managers\LayoutManager.as:665]
> > >
> > >           at
> > > mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.5.1\fram
> > > e works\projects\framework\src\mx\managers\LayoutManager.as:816]
> > >
> > >           at
> > > mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.
> > > 5
> > > .1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:11
> > > 80 ]
> > >
> > >
> > > On Thu, Jul 25, 2013 at 12:17 AM, OmPrakash Muppirala
> > > <bigosmallm@gmail.com>wrote:
> > >
> > > > Moving topic to "users" list.
> > > >
> > > > Oleg, you will get a better response in this forum for questions
> > > > like these.  Please make sure you are subscribed to
> > > > users@flex.apache.orgto see further responses.  You could do so by
> > > > sending an email to users-subscribe@flex.apache.org.
> > > >
> > > > Thanks,
> > > > Om
> > > >
> > > >
> > > > On Wed, Jul 24, 2013 at 9:12 PM, Oleg Konovalov
> > > > <olegkon@gmail.com>
> > > wrote:
> > > >
> > > >> Hi,
> > > >>
> > > >> I am building a screen with one Static DataGrid and one Dynamic
> > > >> (data comes through SOAP and I do not know the number of columns
> > > >> or their names in advance).
> > > >> I also get a list of column names in order from another SOAP call.
> > > >>
> > > >> That Dynamic DataGrid works (converting data from Vector of
> > > >> Objects to ArrayList of Columns).
> > > >>
> > > >> I still have a few problems:
> > > >>
> > > >>
> > > >> 1) I need to implement "Clear" of that Dynamic table.
> > > >>
> > > >> No matter what I tried:
> > > >>
> > > >> arrayColl=null;
> > > >>
> > > >> arrayColl.removeAll();
> > > >>
> > > >> arrayColl = new ArrayCollection();
> > > >>
> > > >> myDG.dataProvider=null;
> > > >>
> > > >> myDG.dataProvider=new ArrayCollection();
> > > >>
> > > >> I am getting NULL reference exception coming from some system code:
> > >  if
> > > >> (cell.visible)...   where cell is null.
> > > >>
> > > >> How can I clear that dynamic DG ?
> > > >>
> > > >>
> > > >>
> > > >> full exception stack:
> > > >>
> > > >> TypeError: Error #1009: Cannot access a property or method of a
> > > >> null object reference.
> > > >> at
> > > >> spark.components.gridClasses::GridLayout/updateTypicalCellSizes()
> > > >> at spark.components.gridClasses::GridLayout/measure()
> > > >> at spark.components.supportClasses::GroupBase/measure()
> > > >> at mx.core::UIComponent/measureSizes()
> > > >> at mx.core::UIComponent/validateSize()
> > > >> at spark.components::Group/validateSize()
> > > >> at mx.managers::LayoutManager/validateSize()
> > > >> at mx.managers::LayoutManager/doPhasedInstantiation()
> > > >> at mx.managers::LayoutManager/doPhasedInstantiationCallback()
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >>
> > > >> 2)  It seems that by default that Dynamic DG puts columns in
> > > alphabetical
> > > >>
> > > >> order, which is of course not what I need.
> > > >>
> > > >> Any way to disable that or fix somehow?
> > > >>
> > > >>
> > > >>
> > > >>
> > > >> 3) I need to show 2 DGs on the screen, and the second of them is
> > > Dynamic,
> > > >>
> > > >> and allow user to resize them vertically to be able to see more
> > > >> in
> > > static
> > > >> or dynamic DG.
> > > >>
> > > >> I put them in VDividedBox (and set height of both DG and
> > > >> container to 100%).
> > > >>
> > > >> It split the screen vertically 50:50, but still there is no
> > > >> draggable
> > in
> > > >> between,
> > > >>
> > > >> so can't resize.
> > > >>
> > > >>
> > > >>
> > > >> Any help is very appreciated.
> > > >>
> > > >>
> > > >>
> > > >>
> > > >> TIA,
> > > >>
> > > >> Oleg.
> > > >>
> > > >
> > > >
> > >
> > >
> > > --
> > > Thank you,
> > > Oleg.
> > >
> >
> >
> >
> > --
> > Martin Miko
> >
>



-- 
Thank you,
Oleg.

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