RE: [flexcoders] BindingUtils and ResourceManager Question
Thanks for the suggestions, Johannes. Unfortunately, using an explicit
event won't scale well in a big application since every access of a
resource string from ActionScript will require this treatment.
I've done a -keep-generated-actionscript and tried to grok the
ActionScript code the Flex compiler generates when specifying a data
binding in MXML and it just doesn't make sense to me just yet.
I'm still on the hunt for a code sample using a ChangeWatcher or some
means to set up the binding without explicit events. My objective is a
single line of code just like using BindingUtils.bindProperty. It seems
like I should be able to write a similar class as BindingUtils and
expose an API that takes a Function as the chain property, instead of an
Object.
Anyway, thanks for your suggestion.
Erik
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On
Behalf Of Johannes Nel
Sent: Wednesday, January 28, 2009 4:01 AM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] BindingUtils and ResourceManager Question
on rereading your post i realise that what you are after is change
events (but my post will also help a bit me thinks)
a few people did custom annotations which function like an event
listener, just google a bit, i think it will make your life easier.
old post///
ok, i will approach it slightly differently.
I would use a presentation model to bind the text to,
so
component
control text=presModel.someText/
/component
in my pres model
class presModel
{
[Bindable(localChange)]
[Bindable (someTextChange)]
public function get someText():String
[Bindable(localChange)]
[Bindable (someOtherTextChange)]
public function get someOtherText():String
}
this way you have groups of text that update at the same time when your
local changes (which in the workflow we use would look something like
this (still inside this presModel)
[Trigger (path=myModel.theLocalleValueIWantToKnowAbout)]
public function set localle(localle:String)
{
dispatchEvent(localChange)
}
where this localChange event will update all the strings which have a
bindable declared with that custom event name.
the trigger annotation is basically an event listener and is the same as
saying
in my local presentation model notify me when the applications localle
changes,
thus someAppModel.addEventListener(localChange)
jpn
On Wed, Jan 28, 2009 at 12:09 AM, Thomas, Erik erik_tho...@intuit.com
mailto:erik_tho...@intuit.com wrote:
Having just localized a medium sized application into Spanish, I
ran into a recurring pattern I had to work around that I really
shouldn't have to, specifically around data binding localized resources
from ActionScript.
For example, in MXML, one can data bind a localized resource and
when the localeChain is switched dynamically, all bound clients will
requery their values and the new language will display:
mx:Label text={resourceManager.getString(ResourceEnums.COMMON,
'labelAppointments}/
When the localeChain is switched, the label above will
automatically update to the Spanish version, just like magic. This is a
very cool feature of Flex 3 resource management.
However, there are many use cases where I need to bind to
resource bundles from within ActionScript, sort of like this:
public class Foo
{
[Bindable]
public var bar:String;
public function Foo()
{
bar = ResourceManager.getString(ResourceEnums.COMMON,
'labelAppointments');
}
}
When the localeChain is updated, bar is obviously not
automatically updated because bar is not bound to the resource, it is
just a simple assignment.
BindingUtil.bindProperty and bindSetter don't appear to offer
parameters that will work with ResourceManager. I've experimented a
little, but it does not appear possible to use BindingUtils to bind to a
resource.
I had to work around this by listening for a localeChange event
and then reassigning the resource to the variable. This does not scale.
So my question is simple: can you bind a variable to a resource
in ActionScript? If so, how?
Thanks!
Erik
Erik Thomas | Small Business Group, Intuit | Staff Engineer |
650-944-2602
--
j:pn
\\no comment
RE: [flexcoders] BindingUtils and ResourceManager Question
HI Yves:
This is a great suggestion! It's pretty readable and doesn't require
changes anywhere else but where you instantiate the property.
I will write a class to manage this, though we can't refactor our MXML
(way too much code) to use the same mechanism. This will just be for
those use cases where we need to bind in ActionScript which is
fortunately a pretty small percentage.
Thank you!
Erik
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On
Behalf Of Yves Riel
Sent: Wednesday, January 28, 2009 6:50 AM
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] BindingUtils and ResourceManager Question
What we have done is to separate ourselves from the resource manager a
bit. We have created a new class that basically has a bindable property
called value. This class is passed the name of the string that is
localized in the resource manager and hooks to the resource manager. It
monitor for changes on the resource manager and when they are detected,
the class sends an event that triggers the binding. So, it can be used
directly in MXML or in the .as file by using the BindingUtils class.
In pseudo code (.as file):
var localizedProp:LocalizedProperty = LocalizedProperty.create(Bundle,
localized property);
BindingUtils.bindProperty( this, your variable, localizedProp,
value);
In pseudo code (.mxml file):
[Bindable] var localizedProp:LocalizedProperty =
LocalizedProperty.create(Bundle, localized property);
mx:label text={localizedProp.value}/
http://geo.yahoo.com/serv?s=97359714/grpId=12286167/grpspId=1705007207/
msgId=135445/stime=1233144154/nc1=4507179/nc2=3848640/nc3=4836040
[flexcoders] BindingUtils and ResourceManager Question
Having just localized a medium sized application into Spanish, I ran
into a recurring pattern I had to work around that I really shouldn't
have to, specifically around data binding localized resources from
ActionScript.
For example, in MXML, one can data bind a localized resource and when
the localeChain is switched dynamically, all bound clients will requery
their values and the new language will display:
mx:Label text={resourceManager.getString(ResourceEnums.COMMON,
'labelAppointments}/
When the localeChain is switched, the label above will automatically
update to the Spanish version, just like magic. This is a very cool
feature of Flex 3 resource management.
However, there are many use cases where I need to bind to resource
bundles from within ActionScript, sort of like this:
public class Foo
{
[Bindable]
public var bar:String;
public function Foo()
{
bar = ResourceManager.getString(ResourceEnums.COMMON,
'labelAppointments');
}
}
When the localeChain is updated, bar is obviously not automatically
updated because bar is not bound to the resource, it is just a simple
assignment.
BindingUtil.bindProperty and bindSetter don't appear to offer parameters
that will work with ResourceManager. I've experimented a little, but it
does not appear possible to use BindingUtils to bind to a resource.
I had to work around this by listening for a localeChange event and then
reassigning the resource to the variable. This does not scale.
So my question is simple: can you bind a variable to a resource in
ActionScript? If so, how?
Thanks!
Erik
Erik Thomas | Small Business Group, Intuit | Staff Engineer |
650-944-2602
Re: [flexcoders] BindingUtils and ResourceManager Question
on rereading your post i realise that what you are after is change events
(but my post will also help a bit me thinks)
a few people did custom annotations which function like an event listener,
just google a bit, i think it will make your life easier.
old post///
ok, i will approach it slightly differently.
I would use a presentation model to bind the text to,
so
component
control text=presModel.someText/
/component
in my pres model
class presModel
{
[Bindable(localChange)]
[Bindable (someTextChange)]
public function get someText():String
[Bindable(localChange)]
[Bindable (someOtherTextChange)]
public function get someOtherText():String
}
this way you have groups of text that update at the same time when your
local changes (which in the workflow we use would look something like this
(still inside this presModel)
[Trigger (path=myModel.theLocalleValueIWantToKnowAbout)]
public function set localle(localle:String)
{
dispatchEvent(localChange)
}
where this localChange event will update all the strings which have a
bindable declared with that custom event name.
the trigger annotation is basically an event listener and is the same as
saying
in my local presentation model notify me when the applications localle
changes,
thus someAppModel.addEventListener(localChange)
jpn
On Wed, Jan 28, 2009 at 12:09 AM, Thomas, Erik erik_tho...@intuit.comwrote:
Having just localized a medium sized application into Spanish, I ran
into a recurring pattern I had to work around that I really shouldn't have
to, specifically around data binding localized resources from ActionScript.
For example, in MXML, one can data bind a localized resource and when the
localeChain is switched dynamically, all bound clients will requery their
values and the new language will display:
mx:Label text={resourceManager.getString(ResourceEnums.COMMON,
'labelAppointments}/
When the localeChain is switched, the label above will automatically update
to the Spanish version, just like magic. This is a very cool feature of Flex
3 resource management.
However, there are many use cases where I need to bind to resource
bundles from within ActionScript, sort of like this:
public class Foo
{
[Bindable]
public var bar:String;
public function Foo()
{
bar = ResourceManager.getString(ResourceEnums.COMMON,
'labelAppointments');
}
}
When the localeChain is updated, bar is obviously not automatically
updated because bar is not bound to the resource, it is just a simple
assignment.
BindingUtil.bindProperty and bindSetter don't appear to offer parameters
that will work with ResourceManager. I've experimented a little, but it does
not appear possible to use BindingUtils to bind to a resource.
I had to work around this by listening for a localeChange event and then
reassigning the resource to the variable. This does not scale.
So my question is simple: *can you bind a variable to a resource in
ActionScript? If so, how?*
Thanks!
Erik
*Erik Thomas* | Small Business Group, *Intuit* | Staff Engineer
| 650-944-2602
--
j:pn
\\no comment
RE: [flexcoders] BindingUtils and ResourceManager Question
What we have done is to separate ourselves from the resource manager a
bit. We have created a new class that basically has a bindable property
called value. This class is passed the name of the string that is
localized in the resource manager and hooks to the resource manager. It
monitor for changes on the resource manager and when they are detected,
the class sends an event that triggers the binding. So, it can be used
directly in MXML or in the .as file by using the BindingUtils class.
In pseudo code (.as file):
var localizedProp:LocalizedProperty = LocalizedProperty.create(Bundle,
localized property);
BindingUtils.bindProperty( this, your variable, localizedProp,
value);
In pseudo code (.mxml file):
[Bindable] var localizedProp:LocalizedProperty =
LocalizedProperty.create(Bundle, localized property);
mx:label text={localizedProp.value}/
http://geo.yahoo.com/serv?s=97359714/grpId=12286167/grpspId=1705007207/
msgId=135445/stime=1233144154/nc1=4507179/nc2=3848640/nc3=4836040
