> I did not see a functional similarity to a pointer in actionscript or did I
> just miss it?
All object references in ActionScript are similar to pointers in that they are
not the object itself, but references to it. For example, when you declare
var textInput1:TextInput = new TextInput();
var textInput2:TextInput = textInput2;
you haven't created two TextInput instances; you have made two variables refer
to ("point to") the same TextInput instance.
Gordon Smith
Adobe Flex SDK Team
From: [email protected] [mailto:[email protected]] On Behalf
Of Dan Pride
Sent: Saturday, January 30, 2010 7:11 PM
To: [email protected]
Subject: Re: [flexcoders] Re: Pointers
Interesting but not quite the design issue I have in mind.
See http://www.danielpride.com/Vehicles3/Vehicles3.html
(Its still a little crude, basically playing with the tech.
Clicking on a row fills in a series of text boxes.
if you edit a box, I want to shift the state just like it does now
when you click the new button at the top, except now it will go to an edit
state.
The idea is you can examine a large data record by selecting it from a row of
important fields, then edit if you like or just look.
Its easy enough to compare the values field by field
but in my old language I would have written a very small
function with two pointers (new and old)
and then just called the same function in each
focus out, passing in the two pointers to the current
field of the focus event.
This has got to be childs play I would think
but newbie status prevents it from popping out of my head I guess.
Dan Pride
--- On Fri, 1/29/10, jamesfin <[email protected]> wrote:
From: jamesfin <[email protected]>
Subject: [flexcoders] Re: Pointers
To: [email protected]
Date: Friday, January 29, 2010, 11:51 PM
Here's what I've done in the past...
// add this in your init code...
myDataGrid.addEvent Listener( ListEvent. ITEM_EDIT_ END, editEnd);
private function editEnd(evt: DataGridEvent) :void{
// get a reference to the datagrid
var grid:DataGrid = evt.target as DataGrid;
// get a reference to the name of the property in the
// underlying object corresponding to the cell that's being edited
var field:String = evt.dataField;
// get a reference to the row number (the index in the
// dataprovider of the row that's being edited)
var row:Number = Number(evt.rowIndex );
// get a reference to the column number of
// the cell that's being edited
var col:int = evt.columnIndex;
if (grid != null){
var oldValue:String = String(grid. dataProvider. getItemAt( row)[field] );
var newValue:String = String(grid. itemEditorInstan ce[grid.columns[
col].editorDataF ield]);
var rowData:XML = XML(grid.dataProvid er.getItemAt( row)[0]);
// check if the value has changed
if (newValue == oldValue){
// nothing has changed...
return;
}
// something has changed...
// do something...
// you could prevent the change if you want
// or do some validation
// or just return and the data move on to the dp.
}
}
--- In flexcod...@yahoogro
ups.com</mc/compose?to=flexcoders%40yahoogroups.com>, Dan Pride <danielpride@
...> wrote:
>
> Looking for suggestions on how to approach an issue.
>
> I want to write a function to compare the current value of a text field with
> the value of the field in the selected row of the dataGrid. I want to use the
> function as a focus-out handler on every text input.
>
> Obviously I don't want to rewrite this for each and every field but I did not
> see a functional similarity to a pointer in actionscript or did I just miss
> it?
>
> This is for the awesome Flashbuilder 4,... I have a text input for every
> field in the value object and want to compare each to the selectedItem for
> the dataGrid and kick some stuff if it does not match.
> Thanks
> Dan Pride
>
