thanks for the clarification.
--- In [email protected], Alex Harui <aharui@...> wrote:
>
> Even columns with visible=false get instantiated when declared in MXML.
>
>
> On 10/10/11 3:36 AM, "bhaq1972" <mbhaque@...> wrote:
>
>
>
>
>
>
> Yes agreed. In our newer applications we do that.
>
> Just curious, if a column is defined as visible=false in mxml. That wouldn't
> be a memory consumption would it?
>
> --- In [email protected] <mailto:flexcoders%40yahoogroups.com> ,
> "valdhor" <valdhorlists@> wrote:
> >
> > If that is the use case I would have built that data grid and columns on
> > the fly in ActionScript. Why bother having columns in memory that you don't
> > use?
> >
> > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> ,
> > "bhaq1972" <mbhaque@> wrote:
> > >
> > > The problem doesn't exist if the code is executed in the preintialize or
> > > creationComplete event. However, I didn't want to mention that because it
> > > takes the focus away from what looks like a bug in initialize. Why would
> > > one column give a runtime error and the other not?
> > > Halo datagrid doesnt have this problem.
> > >
> > > In our scenario, some columns have no relevance to certain customers.
> > > Instead of removing the column from the mxml, we store the column info
> > > (in this case make invisible) in the database.
> > > During the datagrid initialze we make it invisible. The creationcomplete
> > > event would be too late because by then the column would have rendered
> > > (for a split second).
> > >
> > > Preinitialize would be ok...but other parts of my code (unrelated to this
> > > problem) are failing because preinitialize is too early. i can't bare any
> > > more code rewrites(but i suppose it keeps me in a job).
> > >
> > >
> > >
> > >
> > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> ,
> > > "valdhor" <valdhorlists@> wrote:
> > > >
> > > > The column probably hasn't been created yet. Try the creationcomplete
> > > > event of the datagrid.
> > > >
> > > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com>
> > > > , "bhaq1972" <mbhaque@> wrote:
> > > > >
> > > > > I get a runtime error when I set the gridcolumn.visible property
> > > > > during a datagrid initialize event. There is no problem's
> > > > > if its the first gridcolumn. Looks like a bug?
> > > > >
> > > > > Can anyone suggest a workaround?
> > > > >
> > > > >
> > > > > <s:DataGrid initialize="makeColumnInvisible()">
> > > > > <s:columns>
> > > > > <s:ArrayList>
> > > > > <s:GridColumn id="gc0" dataField="col0" headerText="col0"/>
> > > > > <s:GridColumn id="gc1" dataField="col1" headerText="col0"/>
> > > > >
> > > > > ..
> > > > > public function makeColumnInvisible():void
> > > > > {
> > > > > gc1.visible = false; // causes a RTE
> > > > > gc0.visible = false; // doesnt give a problem
> > > > > ..
> > > > >
> > > > >
> > > > > RangeError: Error #1125: The index 1 is out of range 0.
> > > > > at
> > > > > spark.components.gridClasses::GridDimensions/setTypicalCellWidth()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\gridClasses\GridDimensions.as:1325]
> > > > > at
> > > > > spark.components.gridClasses::GridDimensions/columns_visibleChangedHandler()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\gridClasses\GridDimensions.as:1840]
> > > > > at
> > > > > spark.components.gridClasses::GridDimensions/columnsCollectionChanged()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\gridClasses\GridDimensions.as:1800]
> > > > > at
> > > > > spark.components::Grid/columns_collectionChangeHandler()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\Grid.as:4429]
> > > > > at flash.events::EventDispatcher/dispatchEventFunction()
> > > > > at flash.events::EventDispatcher/dispatchEvent()
> > > > > at spark.components.gridClasses::GridColumn/set
> > > > > visible()[E:\dev\hero_private\frameworks\projects\spark\src\spark\components\gridClasses\GridColumn.as:1564]
> > > > > ...
> > > > >
> > > >
> > >
> >
>
>
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>
>
>
> --
> Alex Harui
> Flex SDK Team
> Adobe System, Inc.
> http://blogs.adobe.com/aharui
>
