On Mar 29, 2011, at 9:09 AM, Theodore Petrosky wrote: > okay, let me tell you what I want to accomplish. > > I have a table of 100 rows. I want the user to select an arbitrary group of > rows and change the background color. > > So I thought I would add a boolean setter and getter to the entity:
The entity? This is a UI function, this belongs in the UI code.
> public void setIsSelectedForEdit(boolean _isSelectedForEdit) {
> NSLog.out.appendln("setIsSelectedForEdit in the object = " +
> _isSelectedForEdit);
> this._isSelectedForEdit = _isSelectedForEdit;
> }
>
> public boolean isSelectedForEdit() {
> return _isSelectedForEdit;
> }
>
> then if the users checks the checkbox in an arbitrary group I could know
> which are selected and update the CSS. (I also have an AjaxObserveField
> watching the checkBox and the whole thing is wrapped in an updateContainer)
>
> it works, sort of. the attribute _isSelectedForEdit is getting set but the
> Entity doesn't know it was changed. I don't care about saving this boolean
> value, I just need to know which rows to color (I will save THIS value).
What is the difference?
> That's when I decided to try a 'Real' attribute.
>
> <td>
> <wo:WOCheckBox checked = "$theGridItem.globalUpdate" id =
> "$session.rowID"/><webobject name = "SelectedForEditObserveField"/>
> </td>
>
> globalUpdate is a real boolean attribute of my Grid object.
On the Grid? Why? This is to select rows, it should be on a row not the whole
grid.
> if I bind this attribute to the checkBox, all the objects are marked as
> updated.
>
> so on a lark (or maybe it was a bluejay) I switched back to my original
> setter with a nod to the real attribute:
>
> public void setIsSelectedForEdit(boolean _isSelectedForEdit) {
> NSLog.out.appendln("setIsSelectedForEdit in the object = " +
> _isSelectedForEdit);
> this._isSelectedForEdit = _isSelectedForEdit;
>
> /* let the value be false
> * as I don't really care about this value
> */
>
> this.takeValueForKey(false, _Grid.GLOBAL_UPDATE);
> }
>
> This works as I want. the row get marked to update, the real value never
> changes (I can throw it away) and
>
> NSLog.out.appendln("checkAlteredAction == " + theEC.updatedObjects());
>
> only lists the rows that are selected (checked) as altered.
>
> I don't want to say that there must be a better way. But if it works and
> doesn't blow up then it is good, right?
Well, it is better than not working at all I suppose. :-)
Chuck
>
> There is just too much to learn for one lifetime.
>
> Ted
>
>
>
>
>
> --- On Tue, 3/29/11, Chuck Hill <[email protected]> wrote:
>
>> From: Chuck Hill <[email protected]>
>> Subject: Re: changed objects
>> To: "Theodore Petrosky" <[email protected]>
>> Cc: "David Avendasora" <[email protected]>,
>> [email protected]
>> Date: Tuesday, March 29, 2011, 11:23 AM
>>
>> On Mar 29, 2011, at 5:49 AM, Theodore Petrosky wrote:
>>
>>> I find that i have a boolean that is bound to the
>> 'checked' of my WOCheckBox:
>>>
>>> wo:WOCheckBox checked = "$theGridItem.globalUpdate" /
>>>
>>> Originally I thought it was because I had an
>> AjaxObserveField to watch the checkbox, so I deleted it. No
>> Joy. so as long as the WOCheckBox is there, I have this
>> issue. theEC.updatedObjects() believes that all the entities
>> have been updated.
>>>
>>> The globalUpdate attribute is a boolean (intBoolean)
>> in my postgresql backend.
>>>
>>> Am I screwing this up?
>>
>> Probably. :-) You could override the setter and
>> log out the original and new value and see if that shows
>> anything. An object being in the updated list just
>> indicates that it _may_ have changed. So either the value is
>> getting changed, or WOCheckBox is needlessly setting the
>> Boolean to the exact same value.
>>
>>
>> Chuck
>>
>>
>>> --- On Mon, 3/28/11, David Avendasora <[email protected]>
>> wrote:
>>>
>>>> From: David Avendasora <[email protected]>
>>>> Subject: Re: changed objects
>>>> To: "Chuck Hill" <[email protected]>
>>>> Cc: "Theodore Petrosky" <[email protected]>,
>> [email protected]
>>>> Date: Monday, March 28, 2011, 4:31 PM
>>>> Or, I believe, an MS SQL Server DB
>>>> with Date columns as locking attributes...
>>>>
>>>> Dave
>>>>
>>>> On Mar 28, 2011, at 2:26 PM, Chuck Hill wrote:
>>>>
>>>>> If all the objects are in that list, then all
>> have
>>>> been changed. You might have a floating
>> point value
>>>> that is getting altered due to a formatter (e.g.
>> the scale
>>>> is different).
>>>>>
>>>>> Chuck
>>>>>
>>>>>
>>>>> On Mar 28, 2011, at 11:16 AM, Theodore
>> Petrosky
>>>> wrote:
>>>>>
>>>>>> OK I thought I did this before but I can
>> not think
>>>> of how I did it.
>>>>>>
>>>>>> I have an EC made with: theEC =
>>>> ERXEC.newEditingContext();
>>>>>>
>>>>>> I then get a list and use a displayGroup
>> to
>>>> display it in a table. I want to make a few edits,
>> then ask
>>>> the EC for the changed objects.
>>>>>>
>>>>>> NSLog.out.appendln("checkAltered
>>>> == " + theEC.updatedObjects());
>>>>>>
>>>>>> updatedOjbects returns all the objects in
>> the
>>>> array. I just want the ones that were altered. Is
>> there a
>>>> way?
>>>>>>
>>>>>> Ted
>>>>>
>>>>> --
>>>>> Chuck Hill
>>
>>>> Senior Consultant / VP Development
>>>>>
>>>>> Practical WebObjects - for developers who want
>> to
>>>> increase their overall knowledge of WebObjects or
>> who are
>>>> trying to solve specific problems.
>>>>> http://www.global-village.net/products/practical_webobjects
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>> _______________________________________________
>>>>> Do not post admin requests to the list. They
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>>>>>
>>>>> This email sent to [email protected]
>>>>
>>>>
>>
>> --
>> Chuck Hill
>> Senior Consultant / VP Development
>>
>> Practical WebObjects - for developers who want to increase
>> their overall knowledge of WebObjects or who are trying to
>> solve specific problems.
>> http://www.global-village.net/products/practical_webobjects
>>
>>
>>
>>
>>
>>
>>
>>
--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their overall
knowledge of WebObjects or who are trying to solve specific problems.
http://www.global-village.net/products/practical_webobjects
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