Michael,
i subclassed the datagrid and the datagridcolumn because i saw too
much issues being resolved on this way. (unfortunately).
i dont know much flex neither actionscript, but i read a lot on
documentation and tried a lot of tests. Spent 4 hours on this trying to
do the "right" thing instead of traversing "by hand" the datapath of the
xml...
but damn !!! actionscript is too much temperamental! clearly a
limitation (not a bug) that only root nodes can be evaluated with []s.
is there any place which we can ask for this feature to adobe? would
be great!
but... in mean time... thank you very much for your help bro!
my code, inside the extendes class become (with proper credit ;)
--------------------------------------------------------------------------------------------
override public function itemToLabel(data:Object):String {
if (!data)
return " ";
if (labelFunction != null)
return labelFunction(data, this);
if (owner.labelFunction != null)
return owner.labelFunction(data, this);
if (typeof(data) == "xml") {
data = deriveComplexColumn( data, dataField ).toString();
}
if (typeof(data) == "object") {
try {
data = data[dataField];
}
catch(e:Error) {
data = null;
}
}
if (data is String)
return String(data);
try {
return data.toString();
}
catch(e:Error) {
}
return " ";
}
// function from Michael Labriola from Flexcoders mail list
protected function deriveComplexColumn( data:Object,
complexFieldName:String ):Object {
var dataPtr:Object = data;
var complexName:Array = complexFieldName.split( '.', 10 );
for each ( var key:String in complexName ) dataPtr =
dataPtr[ key ];
return dataPtr;
}
-----------------------------------------------------------------------------------------------
the bad thing is that now sorting on the datagridcolumn doesn't work
anymore... and need to be made "by hand" again...
argh!
will just wait for the client ask for this. ;)
best regards!
Luís Eduardo.
Michael Labriola escreveu:
>
> You are correct. By default the dataField on DataGridColumn only goes
> to the root level of the structure you are passing.
>
> If you are feeling a little ambitious, you can subclass dataGridColumn
> and do something like this:
>
> protected function deriveComplexColumn( data:Object,
> complexFieldName:String ):Object
> {
> var dataPtr:Object;
>
> dataPtr = data;
>
> var complexName:Array;
> complexName = complexFieldName.split( '.', 10 );
>
> for each ( var key:String in complexName )
> {
> dataPtr = dataPtr[ key ];
> }
>
> return dataPtr;
> }
>
> Then in your itemToLabel method, you can replace this:
>
> > try
> > {
> > data = data[dataField];
> > }
>
> with this:
> try
> {
> data = deriveComplexColumn( data, dataField );
> }
>
> ...If you don't want to make your own subclass of dataField, then you
> could do the same thing with an itemRenderer or a labelFunction.
>
> So:
>
> public function myLabelFunc( row:Object, column:DataGridColumn ):String {
> return deriveComplexColumn( row, column.dataField ) as String;
> }
>
> Have fun,
> Mike
>
> --- In flexcoders@yahoogroups.com
> <mailto:flexcoders%40yahoogroups.com>, Luis Eduardo <[EMAIL PROTECTED]>
> wrote:
> >
> >
> > yeah... i guess too that if the xml had another format it should
> work...
> > but it can't have another format... :(.
> > the servlets are coded already and they return a xml that have the
> > format i presented on this sample.
> > not the same data, but this is the format.
> >
> > i search inside the DataGridColumn.as code and find a function named
> > "itemToLabel" that have this portion of code:
> >
> > if (typeof(data) == "object" || typeof(data) == "xml")
> > {
> > try
> > {
> > data = data[dataField];
> > }
> > catch(e:Error)
> > {
> > data = null;
> > }
> > }
> >
> > so, i guess that this way of getting data from a XML (using brackets)
> > only can fetch one level of info on the xml format. Not inside his
> > childrens.
> > in the end, this line of code will probably be evaluated to this:
> data
> > = [EMAIL PROTECTED]
> > To me, this is a bug.... or, being optmistic, a limitation.
> >
> > can someone confirm that? Tracy? Gordon? anyone?
> >
> >
> >
> >
> > thunderstumpgesatwork escreveu:
> >
> > > Hi,
> > >
> > > my guess is that your "dataField" cannot support the complex
> > > "[EMAIL PROTECTED]"... it should be just a single field name.
> > >
> > > To me the XML makes more sense (and is simpler) like this:
> > >
> > > > <mx:XMLList id="employees">
> > > > <employee Id="1" gender="female">
> > > > <name>Christina Coenraets</name>
> > > > </employee>
> > > > <employee Id="2" gender="male">
> > > > <name>Maurice Smith</name>
> > > > </employee>
> > > > </mx:XMLList>
> > >
> > > this makes your dataField just "@gender" which I think should work.
> > >
> > > good luck.
> > >
> > > --- In flexcoders@yahoogroups.com
> <mailto:flexcoders%40yahoogroups.com>
> > > <mailto:flexcoders%40yahoogroups.com>, Luis Eduardo <illogic_code@>
> > > wrote:
> > > >
> > > >
> > > >
> > > > i could solve part of my problem with a workaround, but not all is
> > > > working ok. (i could display the data but the sorting capability is
> > > gone).
> > > > someone have an ideia of how to make this on the rigth path?
> > > > i am using the "labelFunction" property of the datagrid like this:
> > > >
> > > > <?xml version="1.0"?>
> > > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml
> <http://www.adobe.com/2006/mxml>
> > > <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml>>">
> > > > <mx:Script>
> > > > <![CDATA[
> > > > public function getRowLabel(item:Object,
> > > > column:DataGridColumn):String {
> > > > return [EMAIL PROTECTED];
> > > > }
> > > > ]]>
> > > > </mx:Script>
> > > >
> > > > <mx:XMLList id="employees">
> > > > <employee Id="1">
> > > > <name gender="female">Christina Coenraets</name>
> > > > </employee>
> > > > <employee Id="2">
> > > > <name gender="male">Maurice Smith</name>
> > > > </employee>
> > > > </mx:XMLList>
> > > >
> > > > <mx:Panel title="DataGrid Control Example" height="100%"
> > > width="100%"
> > > > paddingTop="10" paddingLeft="10" paddingRight="10">
> > > >
> > > > <mx:DataGrid id="dg" width="100%" height="100%" rowCount="5"
> > > > dataProvider="{employees}">
> > > > <mx:columns>
> > > > <mx:DataGridColumn dataField="@Id" headerText="ID"/>
> > > > <mx:DataGridColumn dataField="[EMAIL PROTECTED]"
> > > > headerText="Gender" labelFunction="getRowLabel"/>
> > > > <mx:DataGridColumn dataField="name" headerText="Name"/>
> > > > </mx:columns>
> > > > </mx:DataGrid>
> > > >
> > > > <mx:Form width="100%" height="100%">
> > > > <mx:FormItem label="Id">
> > > > <mx:Label text="[EMAIL PROTECTED]"/>
> > > > </mx:FormItem>
> > > > <mx:FormItem label="Name">
> > > > <mx:Label text="{dg.selectedItem.name}"/>
> > > > </mx:FormItem>
> > > > <mx:FormItem label="Gender">
> > > > <mx:Label text="[EMAIL PROTECTED]"/>
> > > > </mx:FormItem>
> > > > </mx:Form>
> > > >
> > > > </mx:Panel>
> > > > </mx:Application>
> > > >
> > > >
> > > >
> > > >
> > > ----------------------------------------------------------
> > > >
> > > >
> > > >
> > > >
> > > > Luis Eduardo escreveu:
> > > >
> > > > >
> > > > > hi,
> > > > >
> > > > > i dont know why but my datagrid cant bind well when the format
> of one
> > > > > XML have childrens.
> > > > > i borrow the example on the documentation and make a test to
> you guys
> > > > > see what i am talking about.
> > > > > to see the issue, just select one row and watch the Labels get the
> > > > > "gender" property on the right way but, using the same
> notation, the
> > > > > grid can't show the values.
> > > > >
> > > > > thx for the help,
> > > > >
> > > > > Luís Eduardo.
> > > > >
> > > > > <?xml version="1.0"?>
> > > > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml
> <http://www.adobe.com/2006/mxml>
> > > <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml>>
> > > > > <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml>
> <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml>>>">
> > > > > <mx:XMLList id="employees">
> > > > > <employee Id="1">
> > > > > <name gender="female">Christina Coenraets</name>
> > > > > </employee>
> > > > > <employee Id="2">
> > > > > <name gender="male">Maurice Smith</name>
> > > > > </employee>
> > > > > </mx:XMLList>
> > > > >
> > > > > <mx:Panel title="DataGrid Control Example" height="100%"
> width="100%"
> > > > > paddingTop="10" paddingLeft="10" paddingRight="10">
> > > > >
> > > > > <mx:DataGrid id="dg" width="100%" height="100%" rowCount="5"
> > > > > dataProvider="{employees}">
> > > > > <mx:columns>
> > > > > <mx:DataGridColumn dataField="@Id" headerText="ID"/>
> > > > > <mx:DataGridColumn dataField="[EMAIL PROTECTED]"
> > > > > headerText="Gender"/>
> > > > > <mx:DataGridColumn dataField="name" headerText="Name"/>
> > > > > </mx:columns>
> > > > > </mx:DataGrid>
> > > > >
> > > > > <mx:Form width="100%" height="100%">
> > > > > <mx:FormItem label="Id">
> > > > > <mx:Label text="[EMAIL PROTECTED]"/>
> > > > > </mx:FormItem>
> > > > > <mx:FormItem label="Name">
> > > > > <mx:Label text="{dg.selectedItem.name}"/>
> > > > > </mx:FormItem>
> > > > > <mx:FormItem label="Gender">
> > > > > <mx:Label text="[EMAIL PROTECTED]"/>
> > > > > </mx:FormItem>
> > > > > </mx:Form>
> > > > >
> > > > > </mx:Panel>
> > > > > </mx:Application>
> > > > >
> > > > >
> > > > > _______________________________________________________
> > > > > O Yahoo! está de cara nova. Venha conferir!
> > > > > http://br.yahoo.com <http://br.yahoo.com> <http://br.yahoo.com
> <http://br.yahoo.com>> <http://br.yahoo.com <http://br.yahoo.com>
> > > <http://br.yahoo.com <http://br.yahoo.com>>>
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > > _______________________________________________________
> > > > Novidade no Yahoo! Mail: receba alertas de novas mensagens no seu
> > > celular. Registre seu aparelho agora!
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> > > <http://br.mobile.yahoo.com/mailalertas/
> <http://br.mobile.yahoo.com/mailalertas/>>
> > > >
> > >
> > >
> >
> >
> >
> >
> > _______________________________________________________
> > Novidade no Yahoo! Mail: receba alertas de novas mensagens no seu
> celular. Registre seu aparelho agora!
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> <http://br.mobile.yahoo.com/mailalertas/>
> >
>
>
_______________________________________________________
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