Home » Eclipse Projects » Eclipse Platform » New databinding idiom
| New databinding idiom [message #335780] |
Wed, 29 April 2009 13:26  |
Eclipse User |
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Originally posted by: gaston.tonietti.teracode.com
Hi all,
I've seen here: http://fire-change-event.blogspot.com/ some databinding
examples using new API from 3.5 builds, and I liked it too much.
So the question is, if I want to migrate my old databinding code to the new
style, where can I start reading some documentation?
Maybe a migration path or an old/new comparative table or any other kind of
documentation about the new way of doing databinding.
Thanks a lot.
Gaston.
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| Re: New databinding idiom [message #335784 is a reply to message #335782] |
Wed, 29 April 2009 18:06  |
| Eclipse User |
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Originally posted by: gaston.tonietti.teracode.com
I understand it is more an API extension than a replacement, so it is just
as you said, I want to use it when possible as I like it more.
I'm not concerning with viewers that much as I have a few views (one tree
and some tables) but I will take a look at ViewerSupport for sure since it
seems very powerful.
My main concern is for forms, I make extensive use of eclipse forms in my
application's editors, so I like the new Property API for binding form
fields with domain objects properties.
So, I think I should pay special attention to WidgetProperties and
BeanProperties clases, also to DuplexingObservableValue as my editors
support bulk edition.
Is it right?
Thanks in advance.
Gaston.
Matthew Hall wrote:
> Gaston,
>
> See responses below.
>
>> I've seen here: http://fire-change-event.blogspot.com/ some databinding
>> examples using new API from 3.5 builds, and I liked it too much.
>
> I'm glad you like it!
>
> I'm assuming you're talking about the properties API vs the existing
> observable factory API, e.g.:
>
> BeansObservables.observeValue(bean, "name")
> vs.
> BeanProperties.value("name").observe(bean)
>
>> So the question is, if I want to migrate my old databinding code to the
>> new style, where can I start reading some documentation?
>
> First let me say that you don't *have* to migrate your code; existing
> code will continue to work without modification. However if you want to
> use the property API as a matter of personal taste then you could
> certainly do that.
>
>> Maybe a migration path or an old/new comparative table or any other kind
>> of documentation about the new way of doing databinding.
>
> If you could provide some examples of existing code that you want to
> migrate, I'd be happy to convert it to use the IProperty APIs.
>
> Other than a case-by-case basis the only other thing I'd recommend you
> look at is the ViewerSupport class, which uses properties to make
> binding a viewer very simple.
>
> Matthew
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| Re: New databinding idiom [message #335786 is a reply to message #335782] |
Wed, 29 April 2009 20:01 |
 Boris Bokowski
Messages: 272
Registered: July 2009 |
Senior Member |
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Matthew, ideally you would write at least a new¬eworthy paragraph about
the new API...
Boris
"Matthew Hall" <matthall@woodcraftmill.com> wrote in message
news:gt9ra5$2vo$1@build.eclipse.org...
> Gaston,
>
> See responses below.
>
>> I've seen here: http://fire-change-event.blogspot.com/ some databinding
>> examples using new API from 3.5 builds, and I liked it too much.
>
> I'm glad you like it!
>
> I'm assuming you're talking about the properties API vs the existing
> observable factory API, e.g.:
>
> BeansObservables.observeValue(bean, "name")
> vs.
> BeanProperties.value("name").observe(bean)
>
>> So the question is, if I want to migrate my old databinding code to the
>> new style, where can I start reading some documentation?
>
> First let me say that you don't *have* to migrate your code; existing code
> will continue to work without modification. However if you want to use
> the property API as a matter of personal taste then you could certainly do
> that.
>
>> Maybe a migration path or an old/new comparative table or any other kind
>> of documentation about the new way of doing databinding.
>
> If you could provide some examples of existing code that you want to
> migrate, I'd be happy to convert it to use the IProperty APIs.
>
> Other than a case-by-case basis the only other thing I'd recommend you
> look at is the ViewerSupport class, which uses properties to make binding
> a viewer very simple.
>
> Matthew
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| Re: New databinding idiom [message #335791 is a reply to message #335786] |
Wed, 29 April 2009 21:42 |
Matthew Hall
Messages: 368
Registered: July 2009 |
Senior Member |
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|
That's a good reminder, when is the deadline for M7?
Matthew
Boris Bokowski wrote:
> Matthew, ideally you would write at least a new¬eworthy paragraph about
> the new API...
>
> Boris
>
> "Matthew Hall" <matthall@woodcraftmill.com> wrote in message
> news:gt9ra5$2vo$1@build.eclipse.org...
>> Gaston,
>>
>> See responses below.
>>
>>> I've seen here: http://fire-change-event.blogspot.com/ some databinding
>>> examples using new API from 3.5 builds, and I liked it too much.
>> I'm glad you like it!
>>
>> I'm assuming you're talking about the properties API vs the existing
>> observable factory API, e.g.:
>>
>> BeansObservables.observeValue(bean, "name")
>> vs.
>> BeanProperties.value("name").observe(bean)
>>
>>> So the question is, if I want to migrate my old databinding code to the
>>> new style, where can I start reading some documentation?
>> First let me say that you don't *have* to migrate your code; existing code
>> will continue to work without modification. However if you want to use
>> the property API as a matter of personal taste then you could certainly do
>> that.
>>
>>> Maybe a migration path or an old/new comparative table or any other kind
>>> of documentation about the new way of doing databinding.
>> If you could provide some examples of existing code that you want to
>> migrate, I'd be happy to convert it to use the IProperty APIs.
>>
>> Other than a case-by-case basis the only other thing I'd recommend you
>> look at is the ViewerSupport class, which uses properties to make binding
>> a viewer very simple.
>>
>> Matthew
>
>
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| Re: New databinding idiom [message #335792 is a reply to message #335784] |
Wed, 29 April 2009 22:09 |
Matthew Hall
Messages: 368
Registered: July 2009 |
Senior Member |
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|
Gaston M. Tonietti wrote:
> I understand it is more an API extension than a replacement, so it is just
> as you said, I want to use it when possible as I like it more.
I've been doing the same thing, although I tend to migrate existing code
as I go rather than trying to do everything at once.
> My main concern is for forms, I make extensive use of eclipse forms in my
> application's editors, so I like the new Property API for binding form
> fields with domain objects properties.
>
> So, I think I should pay special attention to WidgetProperties and
> BeanProperties clases, also to DuplexingObservableValue as my editors
> support bulk edition.
It sounds like you've got a good handle on it. The only thing I would
suggest is to familiarize yourself with all of the new property factory
classes:
org.eclipse.core.databinding.BindingProperties -
DataBindingContext#validationStatusProviders, DBC#bindings,
Binding#model, Binding#target, ValidationStatusProvider#models,
VSP#targets, VSP#validationStatus
org.eclipse.core.databinding.property.Properties - general purpose
properties such as self properties, the value of an IObservableValue.
org.eclipse.core.databinding.beans.BeanProperties - beans
org.eclipse.core.databinding.beans.PojoProperties - pojos
org.eclipse.jface.databinding.swt.WidgetProperties - SWT widgets
org.eclipse.jface.databinding.util.JFaceProperties - properties using
the JFace IPropertyChangeListener listener interface
org.eclipse.jface.databinding.viewers.CellEditorProperties -
CellEditor#control property, useful for building nested properties e.g.
TextCellEditor.control.text. Use in conjunction with
ObservableValueEditingSupport.create()
org.eclipse.jface.databinding.viewers.ViewerProperties - Viewer single-
or multiple-selection, checked elements, filters, input
Matthew
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