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Posted to users@tapestry.apache.org by Michael Engelhart <me...@mac.com> on 2004/11/12 22:51:13 UTC
Conditional style attributes
Hi -
I have a page where i have to display 2 different types of domain
objects that need different "style" attributes in their output
depending on what type of object I'm currently iterating on (I iterate
over an aggreate List of data objects that can one of 2 types mixed
up). So as a simple example type A has a style="color:red" and type
B has a style="color:blue".
I'm not sure of the best way to handle this in Tapestry. I realize I
could just wrap the whole jwcid in a conditional for one object and
then an inverted conditional for the other but that seems a bit clunky.
Thanks
Mike
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Re: Conditional style attributes
Posted by Markus Wiederkehr <ma...@gmail.com>.
You could use an OGNL expression to retrieve the value of the style
attribute from your Java class.
Markus
On Fri, 12 Nov 2004 15:51:13 -0600, Michael Engelhart
<me...@mac.com> wrote:
> Hi -
>
> I have a page where i have to display 2 different types of domain
> objects that need different "style" attributes in their output
> depending on what type of object I'm currently iterating on (I iterate
> over an aggreate List of data objects that can one of 2 types mixed
> up). So as a simple example type A has a style="color:red" and type
> B has a style="color:blue".
>
> I'm not sure of the best way to handle this in Tapestry. I realize I
> could just wrap the whole jwcid in a conditional for one object and
> then an inverted conditional for the other but that seems a bit clunky.
>
> Thanks
> Mike
>
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>
>
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Re: Conditional style attributes
Posted by Michael Engelhart <me...@mac.com>.
On Nov 15, 2004, at 8:45 AM, Christian.Haselbach@tngtech.com wrote:
> Quoting Andy Pahne <ap...@der-die-das.org>:
>> try something like
>>
>> <span ...
>> class="ognl: (someObject instanceof SomeClass ) ? 'green' :
>> 'blue')"></span>
>>
>
> Well, it would be more object oriented (and therefore, cleaner) if
> these objects would implement the same interface or have the same
> super class with the method "getStyleClass" which provides the
> needed information. I.e., you can then do something like the following:
>
> <span class="ognl:someObject.styleClass"> ... </span>
>
> Ciao Christian
But then you're mixing presentation and data which is not a good idea
from an OO perspective (or rather from any perspective).
I went with the <span jwcid="@Any" style="ognl:'text-transform:' +
(isObjectA ? 'none' : 'capitalize')"></span>
which worked great. I hadn't come across @Any until it was pointed out
to me the other day.
Thanks
Mike
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Re: Conditional style attributes
Posted by Ch...@tngtech.com.
Quoting Andy Pahne <ap...@der-die-das.org>:
> try something like
>
> <span ...
> class="ognl: (someObject instanceof SomeClass ) ? 'green' :
> 'blue')"></span>
>
Well, it would be more object oriented (and therefore, cleaner) if
these objects would implement the same interface or have the same
super class with the method "getStyleClass" which provides the
needed information. I.e., you can then do something like the following:
<span class="ognl:someObject.styleClass"> ... </span>
Ciao Christian
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Re: Conditional style attributes
Posted by Andy Pahne <ap...@der-die-das.org>.
try something like
<span ...
class="ognl: (someObject instanceof SomeClass ) ? 'green' :
'blue')"></span>
andy
Michael Engelhart wrote:
> Hi -
>
> I have a page where i have to display 2 different types of domain
> objects that need different "style" attributes in their output depending
> on what type of object I'm currently iterating on (I iterate over an
> aggreate List of data objects that can one of 2 types mixed up). So
> as a simple example type A has a style="color:red" and type B has a
> style="color:blue".
>
> I'm not sure of the best way to handle this in Tapestry. I realize I
> could just wrap the whole jwcid in a conditional for one object and then
> an inverted conditional for the other but that seems a bit clunky.
>
> Thanks
> Mike
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>
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Re: Conditional style attributes
Posted by Michael Engelhart <me...@mac.com>.
aha - thanks for the quick replies - that works perfectly.
mike
On Nov 12, 2004, at 4:24 PM, Paul Ferraro wrote:
> Since the HTML for displaying these 2 objects differs by only a single
> attribute, it's probably easiest to place the conditional logic within
> an ognl expression:
> e.g.
>
> <span jwcid="@Any" style="ognl:'color:' + (typeA ? 'red' :
> 'blue')">...</span>
>
> public boolean isTypeA()
> {
> return TypeA.class.isInstance(this.getObject());
> }
>
> Paul
>
> Michael Engelhart wrote:
>
>> Hi -
>>
>> I have a page where i have to display 2 different types of domain
>> objects that need different "style" attributes in their output
>> depending on what type of object I'm currently iterating on (I
>> iterate over an aggreate List of data objects that can one of 2 types
>> mixed up). So as a simple example type A has a style="color:red"
>> and type B has a style="color:blue".
>>
>> I'm not sure of the best way to handle this in Tapestry. I realize I
>> could just wrap the whole jwcid in a conditional for one object and
>> then an inverted conditional for the other but that seems a bit
>> clunky.
>>
>> Thanks
>> Mike
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>>
>
>
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Re: Conditional style attributes
Posted by Paul Ferraro <pm...@columbia.edu>.
Since the HTML for displaying these 2 objects differs by only a single
attribute, it's probably easiest to place the conditional logic within
an ognl expression:
e.g.
<span jwcid="@Any" style="ognl:'color:' + (typeA ? 'red' :
'blue')">...</span>
public boolean isTypeA()
{
return TypeA.class.isInstance(this.getObject());
}
Paul
Michael Engelhart wrote:
> Hi -
>
> I have a page where i have to display 2 different types of domain
> objects that need different "style" attributes in their output
> depending on what type of object I'm currently iterating on (I iterate
> over an aggreate List of data objects that can one of 2 types mixed
> up). So as a simple example type A has a style="color:red" and
> type B has a style="color:blue".
>
> I'm not sure of the best way to handle this in Tapestry. I realize I
> could just wrap the whole jwcid in a conditional for one object and
> then an inverted conditional for the other but that seems a bit clunky.
>
> Thanks
> Mike
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
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