pivot-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Aanjaneya Shukla <aanjan...@vmware.com>
Subject RE: getting object fron its container
Date Wed, 02 Feb 2011 16:36:50 GMT
Getting buttons from a container or say textboxes. One has to recursively iterate the container,
is that the only choice. 
From: Greg Brown [gk_brown@verizon.net]
Sent: Wednesday, February 02, 2011 22:03
To: user@pivot.apache.org
Subject: Re: getting object fron its container

Maybe you should use an interface that defines a getButton() method. That would be more type-safe.

On Feb 2, 2011, at 8:24 AM, Aanjaneya Shukla wrote:

> Okay, but if I have multiple Window object and I randomly load an object into my frame.
In this case I have access to only the Container object and if I have to suppose disable a
button in my window then I need the Button object. And in this case I don't have location
of bxml file, hence I don't think BXMLSerializer can be used.
> Thanks
> ________________________________________
> From: Greg Brown [gk_brown@verizon.net]
> Sent: Wednesday, February 02, 2011 20:53
> To: user@pivot.apache.org
> Subject: Re: getting object fron its container
> Actually, because the BXML ID value is mapped to Component#setName() via the IDProperty
annotation, you could also get the button in the example below via getNamedComponent("Button1").
> However, as Chris noted, getNamedComponent() is not recursive. If you want access to
all values declared with IDs in your BXML file, you should use BXMLSerializer.getNamespace().get()
or implement Bindable in your root element.
> G
> On Feb 2, 2011, at 5:06 AM, Chris Bartlett wrote:
> The Container#getNamedComponent(String) method is defined here
> http://svn.apache.org/repos/asf/pivot/trunk/wtk/src/org/apache/pivot/wtk/Container.java
> You can see that it only iterates over the direct child Components in the Container and
then checks for a matching name property.
> It does *not* check to see if those Components are actually instances of Container, and
then recursively iterate over them.
> It appears that none of the standard Pivot Containers override this method at look into
child Containers, so you would need to roll your own method if you need to do that.
> Bear in mind that theContainer#getNamedComponent(String) method attempts to match against
> BXMLSerializer sets the Component's name property to the same value as the bxml:id as
a convenience, but these are 2 separate values.
> The Component's name can be set explicity in BXML as follows.
> <PushButton bxml:id="Button1" name="Foo" buttonData="%Button1”/>
> or in java (including at runtime) with
> myComponent.setName("Foo");
> If you wanted to find this PushButton by name you would have to supply a value of "Foo",
and not "Button1"
> It will often be more convenient to use the @BXML annotation to pick up objects in your
> The section titled 'The Bindable Interface' in the following tutorial contains more info.
> http://pivot.apache.org/tutorials/stock-tracker.ui.html
> Chris
> On 2 February 2011 17:43, Aanjaneya Shukla <aanjaneya@vmware.com<mailto:aanjaneya@vmware.com>>
> Hi,
> I am having some issues using ‘getNamedComponent’ method.
> BXML file:
> <PushButton bxml:id="Button1" buttonData="%Button1”/>
> Java file:
> PushButton Button1 = (PushButton)window.getNamedComponent("Button1");
> I want to get Button object but I have getting null value returned.

View raw message