Re: a simple t:if question
In T5, 5.1 you can do something like this. In .tml:
t:if test=showTitle
span${reportTitle}/span
...
t:parameter name=else
spanNo report to display/span
/t:parameter
/t:if
and in .java:
public boolean isShowTitle() {
return reportId 0;
}
I believe the else syntax may have changed in T5.2.
R.
-Original Message-
From: hese 1024h...@gmail.com
Reply-to: Tapestry users users@tapestry.apache.org
To: users@tapestry.apache.org
Subject: a simple t:if question
Date: Wed, 10 Nov 2010 13:24:23 -0800 (PST)
Hi,
I am using Tapestry 5. I see that in tapestry 4 it was possible to have
condition values in the if clause. Is something like this available in 5?
Is it possible to check for a particular string value in the t:if tag or is
it just boolean?
I want to do something like
if(str=='somevalue') {
} else {
}
Thanks
Hese
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Re: a simple t:if question
On Thu, 11 Nov 2010 08:15:33 -0200, Richard Hill r...@su3analytics.com
wrote:
In T5, 5.1 you can do something like this. In .tml:
t:if test=showTitle
span${reportTitle}/span
...
t:parameter name=else
spanNo report to display/span
/t:parameter
/t:if
I believe the else syntax may have changed in T5.2.
There are now two syntaxes for passing values to parameters that are
blocks: t:parameter name=xxx (Tapetry 5.0+) and p:xxx (Tapestry
5.1+).
I like to write if/else's this way:
t:if test=showTitle
span${reportTitle}/span
/t:if
t:if test=!showTitle
spanNo report to display/span
/t:if
Better yet, using invisible instrumentation (I love my templates to look
like HTML):
span t:type=If t:test=showTitle${reportTitle}/span
span t:type=If t:test=!showTitleNo report to display/span
Still better yet, moving all the logic to the class, as there's always a
span:
public boolean getReportTitle() {
return reportId 0 ? reportTitle : No report to display;
}
span${reportTitle}/span
:)
--
Thiago H. de Paula Figueiredo
Independent Java, Apache Tapestry 5 and Hibernate consultant, developer,
and instructor
Owner, Ars Machina Tecnologia da Informação Ltda.
http://www.arsmachina.com.br
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Re: a simple t:if question
Excellent tips Thiago, cheers.
-Original Message-
From: Thiago H. de Paula Figueiredo thiag...@gmail.com
Reply-to: Tapestry users users@tapestry.apache.org
To: Tapestry users users@tapestry.apache.org
Subject: Re: a simple t:if question
Date: Thu, 11 Nov 2010 09:52:01 -0200
On Thu, 11 Nov 2010 08:15:33 -0200, Richard Hill r...@su3analytics.com
wrote:
In T5, 5.1 you can do something like this. In .tml:
t:if test=showTitle
span${reportTitle}/span
...
t:parameter name=else
spanNo report to display/span
/t:parameter
/t:if
I believe the else syntax may have changed in T5.2.
There are now two syntaxes for passing values to parameters that are
blocks: t:parameter name=xxx (Tapetry 5.0+) and p:xxx (Tapestry
5.1+).
I like to write if/else's this way:
t:if test=showTitle
span${reportTitle}/span
/t:if
t:if test=!showTitle
spanNo report to display/span
/t:if
Better yet, using invisible instrumentation (I love my templates to look
like HTML):
span t:type=If t:test=showTitle${reportTitle}/span
span t:type=If t:test=!showTitleNo report to display/span
Still better yet, moving all the logic to the class, as there's always a
span:
public boolean getReportTitle() {
return reportId 0 ? reportTitle : No report to display;
}
span${reportTitle}/span
:)
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Re: a simple t:if question
public String getReportTitle()
:-)
Am 11.11.2010 um 12:52 schrieb Thiago H. de Paula Figueiredo:
On Thu, 11 Nov 2010 08:15:33 -0200, Richard Hill r...@su3analytics.com
wrote:
In T5, 5.1 you can do something like this. In .tml:
t:if test=showTitle
span${reportTitle}/span
...
t:parameter name=else
spanNo report to display/span
/t:parameter
/t:if
I believe the else syntax may have changed in T5.2.
There are now two syntaxes for passing values to parameters that are blocks:
t:parameter name=xxx (Tapetry 5.0+) and p:xxx (Tapestry 5.1+).
I like to write if/else's this way:
t:if test=showTitle
span${reportTitle}/span
/t:if
t:if test=!showTitle
spanNo report to display/span
/t:if
Better yet, using invisible instrumentation (I love my templates to look like
HTML):
span t:type=If t:test=showTitle${reportTitle}/span
span t:type=If t:test=!showTitleNo report to display/span
Still better yet, moving all the logic to the class, as there's always a
span:
public boolean getReportTitle() {
return reportId 0 ? reportTitle : No report to display;
}
span${reportTitle}/span
:)
--
Thiago H. de Paula Figueiredo
Independent Java, Apache Tapestry 5 and Hibernate consultant, developer, and
instructor
Owner, Ars Machina Tecnologia da Informação Ltda.
http://www.arsmachina.com.br
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Re: a simple t:if question
On Thu, 11 Nov 2010 09:58:42 -0200, Christian Riedel cr.ml...@googlemail.com wrote: public String getReportTitle() :-) Yep, programming my e-mail client (Opera's M@) hasn't Java type checking . . . :D -- Thiago H. de Paula Figueiredo Independent Java, Apache Tapestry 5 and Hibernate consultant, developer, and instructor Owner, Ars Machina Tecnologia da Informação Ltda. http://www.arsmachina.com.br - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: a simple t:if question
wow! A wealth of information. Thank you all! -- View this message in context: http://tapestry.1045711.n5.nabble.com/a-simple-t-if-question-tp3259452p3260417.html Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
a simple t:if question
Hi,
I am using Tapestry 5. I see that in tapestry 4 it was possible to have
condition values in the if clause. Is something like this available in 5?
Is it possible to check for a particular string value in the t:if tag or is
it just boolean?
I want to do something like
if(str=='somevalue') {
} else {
}
Thanks
Hese
--
View this message in context:
http://tapestry.1045711.n5.nabble.com/a-simple-t-if-question-tp3259452p3259452.html
Sent from the Tapestry - User mailing list archive at Nabble.com.
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Re: a simple t:if question
...and is it possible to pass parameters into the if evaluating function and
receive a boolean/string back?
something like
if( foo('somevalue) ) {
} else {
}
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Re: a simple t:if question
Short answer: No.
You have to create a public method in the page class and refer to it. All
logic should be in java, not tml.
On Wed, Nov 10, 2010 at 10:26 PM, hese 1024h...@gmail.com wrote:
...and is it possible to pass parameters into the if evaluating function
and
receive a boolean/string back?
something like
if( foo('somevalue) ) {
} else {
}
--
View this message in context:
http://tapestry.1045711.n5.nabble.com/a-simple-t-if-question-tp3259452p3259456.html
Sent from the Tapestry - User mailing list archive at Nabble.com.
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Re: a simple t:if question
ok thanks! -- View this message in context: http://tapestry.1045711.n5.nabble.com/a-simple-t-if-question-tp3259452p3259547.html Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: a simple t:if question
On Wed, 10 Nov 2010 19:26:18 -0200, hese 1024h...@gmail.com wrote: ...and is it possible to pass parameters into the if evaluating function and receive a boolean/string back? Hi! You pass a parameter to the If parameter (and any other parameter of any other component) using a binding. See http://tapestry.apache.org/tapestry5.1/guide/parameters.html for more information about bindings. If don't specify one, the default binding specified by the parameter is used. For the value parameter of If, the default binding is prop. It supports some expressions described in http://tapestry.apache.org/tapestry5.1/guide/propexp.html. Anyway, follow Inge's advice, which is very wise and based: logic belongs in classes, not in templates. That's a bit of what MVC means. Tapestry 4 uses OGNL as its expression binding, but Tapestry 5 has a deliberately less powerful expression binding due to the approach stated above. -- Thiago H. de Paula Figueiredo Independent Java, Apache Tapestry 5 and Hibernate consultant, developer, and instructor Owner, Ars Machina Tecnologia da Informação Ltda. http://www.arsmachina.com.br - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: a simple t:if question
On Wed, Nov 10, 2010 at 2:21 PM, Thiago H. de Paula Figueiredo thiag...@gmail.com wrote: On Wed, 10 Nov 2010 19:26:18 -0200, hese 1024h...@gmail.com wrote: ...and is it possible to pass parameters into the if evaluating function and receive a boolean/string back? Hi! You pass a parameter to the If parameter (and any other parameter of any other component) using a binding. See http://tapestry.apache.org/tapestry5.1/guide/parameters.html for more information about bindings. If don't specify one, the default binding specified by the parameter is used. For the value parameter of If, the default binding is prop. It supports some expressions described in http://tapestry.apache.org/tapestry5.1/guide/propexp.html. Anyway, follow Inge's advice, which is very wise and based: logic belongs in classes, not in templates. That's a bit of what MVC means. Tapestry 4 uses OGNL as its expression binding, but Tapestry 5 has a deliberately less powerful expression binding due to the approach stated above. Less expressive, but not less powerful. T5's property expressions are type-safe and non-reflective, with no unwanted synchronization logic, so I'd call that a better than even trade! -- Thiago H. de Paula Figueiredo Independent Java, Apache Tapestry 5 and Hibernate consultant, developer, and instructor Owner, Ars Machina Tecnologia da Informação Ltda. http://www.arsmachina.com.br - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org -- Howard M. Lewis Ship Creator of Apache Tapestry The source for Tapestry training, mentoring and support. Contact me to learn how I can get you up and productive in Tapestry fast! (971) 678-5210 http://howardlewisship.com
Re: a simple t:if question
YES... tml t:if test=x x needs boolean java boolean x; if(mystring.equals(tapestry)) x = true else x=false Hope you understand the logic. -- View this message in context: http://tapestry.1045711.n5.nabble.com/a-simple-t-if-question-tp3259452p3259618.html Sent from the Tapestry - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: a simple t:if question
On Wed, 10 Nov 2010 20:56:55 -0200, Howard Lewis Ship hls...@gmail.com wrote: Less expressive, but not less powerful. T5's property expressions are type-safe and non-reflective, with no unwanted synchronization logic, so I'd call that a better than even trade! I stand corrected. :) -- Thiago H. de Paula Figueiredo Independent Java, Apache Tapestry 5 and Hibernate consultant, developer, and instructor Owner, Ars Machina Tecnologia da Informação Ltda. http://www.arsmachina.com.br - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
