Hi Martin
Could you please answer this if possible? I really need the answer...
On Fri, Nov 6, 2009 at 4:08 PM, Jean-Noël Rivasseau <[email protected]>wrote:
> Hi,
>
> My code looks stupid of course, it was just an example. What I actually
> want is to remove all the bindings for a given object (the actual reason I
> want to do that is because I am writing tests in the testRunner, and I need
> to remove the bindings in the tearDown().
>
> If the only way is to use the controller... how can I achieve it? The
> controller does not seem to have any methods to remove the bindings.
>
> About 2), I will try as soon as possible - is it possible to use a
> controller for the single value binding? I somehow prefer controllers.
>
>
> On Fri, Nov 6, 2009 at 11:40 AM, MartinWittemann <
> [email protected]> wrote:
>
>>
>> Hello Jean-Noël,
>>
>> 1) Your code looks something wrong to me. I don't get what you are trying
>> to
>> do. But removeAllBindings using a list controller should not be called
>> because the controller handles all the bindings and is responsible for the
>> whole life cycle of them.
>> If you just want to remove all fonts, why take care of the binding. This
>> should be the problem of the controller. ;) So just use the last line and
>> the list will be empty.
>>
>> 2) You can achieve that by using two bindings. Lets say object A has the
>> data array stored in property a. Now you can set up a single value binding
>> like this:
>> A.bind("a", listController, "model");
>> The list controller takes care of the given model and the single value
>> binding takes care of setting the model. Thats the most elegant way to do
>> it
>> i think.
>>
>> Regards,
>> Martin
>>
>>
>> Jean-Noël Rivasseau wrote:
>> >
>> > Hi,
>> >
>> > I have two questions, mainly about the list controller.
>> >
>> > 1) First, does the removeAllBindings() work for data arrays that are
>> bound
>> > to a UI element such as a selectbox?
>> >
>> > The following code for example throws an error:
>> >
>> > var listController = new
>> > qx.data.controller.List(this.getFonts(), object.fontList);
>> >
>> > this.getFonts().removeAllBindings();
>> > listController.setTarget(null);
>> > this.getFonts().removeAll();
>> >
>> > It fails on the last line with: this.getTarget() is null
>> > This is due to the binding, that somehow was not removed by
>> >
>> > this.getFonts().removeAllBindings();
>> >
>> > Is that a bug? Or is there a different way to remove bindings for a
>> list?
>> >
>> > 2) I have an object that has a List (a data array). How can I set data
>> > binding for the list (via a list controller), to a SelectBox for
>> instance,
>> > but which would also work when the object change? Eg, I want that the
>> list
>> > be always up to date with respect to the current object list. Either the
>> > object or the list may change.
>> >
>> > I have no idea on how to do that. With simple object controller, deep
>> > binding works (eg, any change in the property chain will work), but I am
>> > not
>> > sure how to achieve that with a list.
>> >
>> > Thanks,
>> > Jean-Noel
>> >
>> > PS: after a bit of porting and adjustment, let me congratulate the whole
>> > team about Qx 0.8.3. It is a big step forward and not only for the bug
>> > fixing: I like the new APIs much better (more consistent).
>> >
>> >
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>>
>> --
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>> http://n2.nabble.com/Data-binding-questions-tp3954836p3957973.html
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>>
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