How do you get listData to a DataGrid itemRenderer?
I want to do simple reusable components in .mxml use in my dataGrid classes. I don't want to specify the data field because I could use the same rendering engine of several columns in the same grid (for example a converter box) and I don't want to make several identical components whose only difference is the value that they draw 'data. To do this, I need to access "listData. Specifically listData.dataField. According to the docs, I need to implement the mx.controls.listClasses.IDropInListRenderer. I tried the following in my mxml code:< mx:Component id = "reusableEditor" >
< mx:HBox implements = "mx.controls.dataGridClasses.DataGridItemRenderer" >
import mx.controls.dataGridClasses
.. content and display logic data [listData.dataField]...
< / mx:HBox >
< / mx:Component >
"I get an unnecessary error in Flex Builder, saying that"an internal build error has occurred"and only guess now that it is the 'implements ="mx.controls.dataGridClasses.DataGridItemRenderer' line ' (when I delete this line, things work very well). I have not found anywhere to check if I implement this correctly because there is not an example of work that does what I want to do - even if I use DataGrid 100's of times more often than any other list class! The example of TreeRenderer later in the docs is the only code addressing this issue, but it is a class AS that does not (as far as I can tell) a container such as HBox and doesn't implement any interface.
Just how can the question, I have access to listData?
the
Although this component is very simple, it was very difficult to understand how to implement documentation... I hope someone from Adobe takes note.
private var _listData:DataGridListData; [Bindable ("dataChange")] public function set {listData(value:BaseListData):void} override public function drawFocus(focused:Boolean):void {} override protected function updateDisplayList(unscaledWidth:Number,_unscaledHeight:Number):void {} define a getter based on the "dataChange" event seems to update the value of the checkbox correctly when ]]>
I finally understood what the ambiguous compiler error means... I had not implemented the functions required for the interface. Here is the working code that is declared as a component internal or external .mxml file displays the value of the column without explicitly defining what is this value.
[Bindable]
public var dp:Array = [{num:2, bool:true}, {num:3, bool:false}];
]]>
Import mx.controls.listClasses.BaseListData;
Import mx.controls.dataGridClasses.DataGridListData;
public function get listData (): {BaseListData}
Return _listData;
}
_listData = DataGridListData (value);
}
check.setFocus ();
}
super.updateDisplayList (unscaledWidth, unscaledHeight);
If {(super.data)
var dgListData:DataGridListData = DataGridListData (listData);
for some reason, setting check.selected here translates into behaviour bug
Check.Selected = data [dgListData.dataField];
}
}
clicked, decreed, sorting, etc...
In addition, doing it this way avoids those annoying "data binding will not be able to detect changes... blah blah"
[Bindable ("dataChange")]
public function get val (): Boolean {}
Return Boolean (data [_listData.dataField]);
}
If anyone has any suggestions or comments, please let me know... I'm still trying to figure the best way to do it.
Tags: Flex
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