Re: Loop and iterator
You can use two loops. Example here: http://tapestry-stitch.uklance.cloudbees.net/gallerydemo On 29 Jan 2014 16:12, Dimitris Zenios dimitris.zen...@gmail.com wrote: Is it possible to make the loop component expose the iterator through a public method? There are situations where a mixin might want to use it. Best Regards Dimitris Zenios
Re: Loop and iterator
On Thu, 30 Jan 2014 00:31:35 -0200, Bob Harner bobhar...@gmail.com wrote: You mean as a mixin applied to the Loop component? I guess so, but I don't see how that would make it any better. I love mixins! :) And your component doesn't really generate content by itself (it just rewrites what some other does), and in this scenario I always go for a mixin. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
I have a list of 8 elements.I want to loop over the elements and every 3 elements or at beginning of list to Start with a div and end with a /div. Resulting output should be div item item item? /div div item item item /div div item item /div So i though i will create a mixin that attaches to the loop and adds those divs.I managed to almost make it work except one last case.After the last element i want to close my previous div even if the index is not % 3.In order to know that loop is in the last element i need the iterator of the loop. On Wed, Jan 29, 2014 at 8:08 PM, Thiago H de Paula Figueiredo thiag...@gmail.com wrote: On Wed, 29 Jan 2014 14:10:53 -0200, Dimitris Zenios dimitris.zen...@gmail.com wrote: Is it possible to make the loop component expose the iterator through a public method? There are situations where a mixin might want to use it. Which ones? Never needed it. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
On Wed, 29 Jan 2014 16:17:49 -0200, Dimitris Zenios dimitris.zen...@gmail.com wrote: I have a list of 8 elements.I want to loop over the elements and every 3 elements or at beginning of list to Start with a div and end with a /div. Resulting output should be div item item item? /div div item item item /div div item item /div So i though i will create a mixin that attaches to the loop and adds those divs.I managed to almost make it work except one last case.After the last element i want to close my previous div even if the index is not % 3.In order to know that loop is in the last element i need the iterator of the loop. I'd use pure DOM rewriting instead. tapestry-xpath is extremely helpful for these situations. Don't expect the Tapestry team to expose implementation details: they don't like it. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
What about something similar to varStatus in jsf? On Jan 29, 2014, at 2:01 PM, Thiago H de Paula Figueiredo thiag...@gmail.com wrote: On Wed, 29 Jan 2014 16:17:49 -0200, Dimitris Zenios dimitris.zen...@gmail.com wrote: I have a list of 8 elements.I want to loop over the elements and every 3 elements or at beginning of list to Start with a div and end with a /div. Resulting output should be div item item item? /div div item item item /div div item item /div So i though i will create a mixin that attaches to the loop and adds those divs.I managed to almost make it work except one last case.After the last element i want to close my previous div even if the index is not % 3.In order to know that loop is in the last element i need the iterator of the loop. I'd use pure DOM rewriting instead. tapestry-xpath is extremely helpful for these situations. Don't expect the Tapestry team to expose implementation details: they don't like it. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
1.Passing the collection to the mixin and the component is one solution but i doesn'`t feel nice.I never had to pass the same parameter twice 2.Regarding render variables i don't see where these will help in my situation 3.Dom rewriting ( Javascript ? ) On Wed, Jan 29, 2014 at 9:10 PM, Ville Virtanen ville.virta...@orientimport.fi wrote: Hi, you can pass mixins parameters, so you could pass the original collection you're iterating over with the loop to the mixin also, and compare if the collection.size() == index http://tapestry.apache.org/component-mixins.html Look for Mixin Parameters. Ville -Alkuperäinen viesti- Lähettäjä: Thiago H de Paula Figueiredo [mailto:thiag...@gmail.com] Lähetetty: 29. tammikuuta 2014 21:02 Vastaanottaja: Tapestry development Aihe: Re: Loop and iterator On Wed, 29 Jan 2014 16:17:49 -0200, Dimitris Zenios dimitris.zen...@gmail.com wrote: I have a list of 8 elements.I want to loop over the elements and every 3 elements or at beginning of list to Start with a div and end with a /div. Resulting output should be div item item item? /div div item item item /div div item item /div So i though i will create a mixin that attaches to the loop and adds those divs.I managed to almost make it work except one last case.After the last element i want to close my previous div even if the index is not % 3.In order to know that loop is in the last element i need the iterator of the loop. I'd use pure DOM rewriting instead. tapestry-xpath is extremely helpful for these situations. Don't expect the Tapestry team to expose implementation details: they don't like it. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
Yes but i cannot access the Iterator since is a private variable.Also the source parameter is declared as Iterable.I am not sure whether i am able to cast iterable to to List in order to get size.I think no On Wed, Jan 29, 2014 at 9:32 PM, Ville Virtanen ville.virta...@orientimport.fi wrote: Take a look at @BindParameter http://tapestry.apache.org/component-mixins.html -- Look for Binding the parameter of the core component You can access all component parameters in the mixin Ville Virtanen -Alkuperäinen viesti- Lähettäjä: Dimitris Zenios [mailto:dimitris.zen...@gmail.com] Lähetetty: 29. tammikuuta 2014 21:22 Vastaanottaja: Tapestry development Aihe: Re: Loop and iterator 1.Passing the collection to the mixin and the component is one solution but i doesn'`t feel nice.I never had to pass the same parameter twice 2.Regarding render variables i don't see where these will help in my situation 3.Dom rewriting ( Javascript ? ) On Wed, Jan 29, 2014 at 9:10 PM, Ville Virtanen ville.virta...@orientimport.fi wrote: Hi, you can pass mixins parameters, so you could pass the original collection you're iterating over with the loop to the mixin also, and compare if the collection.size() == index http://tapestry.apache.org/component-mixins.html Look for Mixin Parameters. Ville -Alkuperäinen viesti- Lähettäjä: Thiago H de Paula Figueiredo [mailto:thiag...@gmail.com] Lähetetty: 29. tammikuuta 2014 21:02 Vastaanottaja: Tapestry development Aihe: Re: Loop and iterator On Wed, 29 Jan 2014 16:17:49 -0200, Dimitris Zenios dimitris.zen...@gmail.com wrote: I have a list of 8 elements.I want to loop over the elements and every 3 elements or at beginning of list to Start with a div and end with a /div. Resulting output should be div item item item? /div div item item item /div div item item /div So i though i will create a mixin that attaches to the loop and adds those divs.I managed to almost make it work except one last case.After the last element i want to close my previous div even if the index is not % 3.In order to know that loop is in the last element i need the iterator of the loop. I'd use pure DOM rewriting instead. tapestry-xpath is extremely helpful for these situations. Don't expect the Tapestry team to expose implementation details: they don't like it. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
I am not sure whether i will be able to cast to collection.Maybe tapestry
is doing some magic with BindParameter.
On Wed, Jan 29, 2014 at 9:47 PM, Ville Virtanen
ville.virta...@orientimport.fi wrote:
OK, got it. I thought the source param was collection.
You always could (pseudocode)
if (values instanceof Collection?) {
return ((Collection?) source).size();
} else {
it = source.iterator();
while (it.hasNext()) {
it.next();
sum++;
}
return sum;
}
Ville
-Alkuperäinen viesti-
Lähettäjä: Dimitris Zenios [mailto:dimitris.zen...@gmail.com]
Lähetetty: 29. tammikuuta 2014 21:38
Vastaanottaja: Tapestry development
Aihe: Re: Loop and iterator
Yes but i cannot access the Iterator since is a private variable.Also the
source parameter is declared as Iterable.I am not sure whether i am able to
cast iterable to to List in order to get size.I think no
On Wed, Jan 29, 2014 at 9:32 PM, Ville Virtanen
ville.virta...@orientimport.fi wrote:
Take a look at
@BindParameter
http://tapestry.apache.org/component-mixins.html -- Look for Binding
the parameter of the core component
You can access all component parameters in the mixin
Ville Virtanen
-Alkuperäinen viesti-
Lähettäjä: Dimitris Zenios [mailto:dimitris.zen...@gmail.com]
Lähetetty: 29. tammikuuta 2014 21:22
Vastaanottaja: Tapestry development
Aihe: Re: Loop and iterator
1.Passing the collection to the mixin and the component is one
solution but i doesn'`t feel nice.I never had to pass the same
parameter twice 2.Regarding render variables i don't see where these
will help in my situation 3.Dom rewriting ( Javascript ? )
On Wed, Jan 29, 2014 at 9:10 PM, Ville Virtanen
ville.virta...@orientimport.fi wrote:
Hi,
you can pass mixins parameters, so you could pass the original
collection you're iterating over with the loop to the mixin also,
and compare if the
collection.size() == index
http://tapestry.apache.org/component-mixins.html Look for Mixin
Parameters.
Ville
-Alkuperäinen viesti-
Lähettäjä: Thiago H de Paula Figueiredo [mailto:thiag...@gmail.com]
Lähetetty: 29. tammikuuta 2014 21:02
Vastaanottaja: Tapestry development
Aihe: Re: Loop and iterator
On Wed, 29 Jan 2014 16:17:49 -0200, Dimitris Zenios
dimitris.zen...@gmail.com wrote:
I have a list of 8 elements.I want to loop over the elements and
every
3 elements or at beginning of list to Start with a div and end
with a /div.
Resulting output should be
div
item
item
item?
/div
div
item
item
item
/div
div
item
item
/div
So i though i will create a mixin that attaches to the loop and
adds those divs.I managed to almost make it work except one last
case.After the last element i want to close my previous div even
if the index is not % 3.In order to know that loop is in the last
element i need the iterator of the loop.
I'd use pure DOM rewriting instead. tapestry-xpath is extremely
helpful for these situations. Don't expect the Tapestry team to
expose implementation details: they don't like it.
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
- To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
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Re: Loop and iterator
On Wed, 29 Jan 2014 17:07:13 -0200, Lenny Primak lpri...@hope.nyc.ny.us wrote: What about something similar to varStatus in jsf? No need for that. You already have the index and value parameters. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
On Wed, 29 Jan 2014 17:58:08 -0200, Dimitris Zenios dimitris.zen...@gmail.com wrote: I am not sure whether i will be able to cast to collection.Maybe tapestry is doing some magic with BindParameter. You don't need to cast it to a Collection, because Iterable is exactly the Java interface implemented by any class which provides an Iterator. Just use Iterable and its iterator() method directly. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
On Wed, 29 Jan 2014 17:21:31 -0200, Dimitris Zenios dimitris.zen...@gmail.com wrote: 3.Dom rewriting ( Javascript ? ) Nope. Using void afterRender(MarkupWriter writer) in your mixin. writer.getDocument() returns the Tapestry Document object. You can manipulate its Elements any way you want. -- Thiago H. de Paula Figueiredo Tapestry, Java and Hibernate consultant and developer http://machina.com.br - To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
Maybe this handy little component will help:
/**
* A Tapestry component that rearranges the HTML items in its body into multiple
* columns. It accomplishes this by DOM manipulation after the body is rendered
* to the DOM.
* p
* Note: For this to work properly, the items that you wrap this component
* around must each consist of a single HTML element (possibly with nested
* elements). For example, the following works, because each item is contained
* within a single lt;ligt; element:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;ligt;lt;bgt;Name:lt;/bgt;{$oneItem.name}lt;/ligt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*
* But the following fails to lay out property, because there are two HTML
* elements -- a span and a br -- per item:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;spangt;${oneItem.name}lt;/spangt;lt;br /gt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*/
@SupportsInformalParameters
public class Columns {
/**
* The number of columns to divide the items into
*/
@Property
@Parameter(value=5, defaultPrefix=literal)
private int number;
@Property
@Parameter(value=literal:t-column)
private String columnClass;
@Inject
private ComponentResources componentResources;
/**
* Manipulate the Tapestry-rendered DOM to insert as many DIV elements as
* needed to break up the list of items in our body into the requested
* number of columns. This method is only called after the body is
* rendered into the DOM.
*
* @param writer
*/
@AfterRenderBody
void manipulateTheDom(MarkupWriter writer)
{
Element container = writer.getElement();
// figure out how many items should go into each column
ListNode children = container.getChildren();
int numChildren = children.size();
int itemsPerColumn = numChildren / number;
int remainder = numChildren % number;
int itemNum = 0;
// render informal parameters into the container element
componentResources.renderInformalParameters(writer);
for (int columnNumber = 0; columnNumber number; columnNumber++)
{
int extras = (remainder 0) ? 1 : 0;
remainder--;
int numItemsthisColumn = itemsPerColumn + extras;
// Make a per-column wrapper element and move it to the bottom
Element columnElement = container.element(div, class,
columnClass);
columnElement.moveToBottom(container);
// move some children into the new column wrapper element
for (int i = 0; i numItemsthisColumn; i++)
{
children.get(itemNum).moveToBottom(columnElement);
itemNum++;
}
}
}
}
On Wed, Jan 29, 2014 at 3:28 PM, Thiago H de Paula Figueiredo
thiag...@gmail.com wrote:
On Wed, 29 Jan 2014 17:58:08 -0200, Dimitris Zenios
dimitris.zen...@gmail.com wrote:
I am not sure whether i will be able to cast to collection.Maybe tapestry
is doing some magic with BindParameter.
You don't need to cast it to a Collection, because Iterable is exactly the
Java interface implemented by any class which provides an Iterator. Just use
Iterable and its iterator() method directly.
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
If you use that Columns component you'll also need some CSS:
DIV.t-column {
float: left;
padding: 1em;
}
Or, you can use a different CSS class name (other than t-column) by
passing the class name as a component parameter:
t:columns number=3 columnClass=foo
t:loop source=items value=item
div${item.name}/div
/t:loop
/t:columns
On Wed, Jan 29, 2014 at 4:57 PM, Bob Harner bobhar...@gmail.com wrote:
Maybe this handy little component will help:
/**
* A Tapestry component that rearranges the HTML items in its body into
multiple
* columns. It accomplishes this by DOM manipulation after the body is
rendered
* to the DOM.
* p
* Note: For this to work properly, the items that you wrap this component
* around must each consist of a single HTML element (possibly with nested
* elements). For example, the following works, because each item is contained
* within a single lt;ligt; element:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;ligt;lt;bgt;Name:lt;/bgt;{$oneItem.name}lt;/ligt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*
* But the following fails to lay out property, because there are two HTML
* elements -- a span and a br -- per item:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;spangt;${oneItem.name}lt;/spangt;lt;br /gt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*/
@SupportsInformalParameters
public class Columns {
/**
* The number of columns to divide the items into
*/
@Property
@Parameter(value=5, defaultPrefix=literal)
private int number;
@Property
@Parameter(value=literal:t-column)
private String columnClass;
@Inject
private ComponentResources componentResources;
/**
* Manipulate the Tapestry-rendered DOM to insert as many DIV elements as
* needed to break up the list of items in our body into the requested
* number of columns. This method is only called after the body is
* rendered into the DOM.
*
* @param writer
*/
@AfterRenderBody
void manipulateTheDom(MarkupWriter writer)
{
Element container = writer.getElement();
// figure out how many items should go into each column
ListNode children = container.getChildren();
int numChildren = children.size();
int itemsPerColumn = numChildren / number;
int remainder = numChildren % number;
int itemNum = 0;
// render informal parameters into the container element
componentResources.renderInformalParameters(writer);
for (int columnNumber = 0; columnNumber number; columnNumber++)
{
int extras = (remainder 0) ? 1 : 0;
remainder--;
int numItemsthisColumn = itemsPerColumn + extras;
// Make a per-column wrapper element and move it to the bottom
Element columnElement = container.element(div, class,
columnClass);
columnElement.moveToBottom(container);
// move some children into the new column wrapper element
for (int i = 0; i numItemsthisColumn; i++)
{
children.get(itemNum).moveToBottom(columnElement);
itemNum++;
}
}
}
}
On Wed, Jan 29, 2014 at 3:28 PM, Thiago H de Paula Figueiredo
thiag...@gmail.com wrote:
On Wed, 29 Jan 2014 17:58:08 -0200, Dimitris Zenios
dimitris.zen...@gmail.com wrote:
I am not sure whether i will be able to cast to collection.Maybe tapestry
is doing some magic with BindParameter.
You don't need to cast it to a Collection, because Iterable is exactly the
Java interface implemented by any class which provides an Iterator. Just use
Iterable and its iterator() method directly.
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
Nice one Bob.I think these solves my problem
On Thu, Jan 30, 2014 at 12:08 AM, Bob Harner bobhar...@gmail.com wrote:
If you use that Columns component you'll also need some CSS:
DIV.t-column {
float: left;
padding: 1em;
}
Or, you can use a different CSS class name (other than t-column) by
passing the class name as a component parameter:
t:columns number=3 columnClass=foo
t:loop source=items value=item
div${item.name}/div
/t:loop
/t:columns
On Wed, Jan 29, 2014 at 4:57 PM, Bob Harner bobhar...@gmail.com wrote:
Maybe this handy little component will help:
/**
* A Tapestry component that rearranges the HTML items in its body into
multiple
* columns. It accomplishes this by DOM manipulation after the body is
rendered
* to the DOM.
* p
* Note: For this to work properly, the items that you wrap this
component
* around must each consist of a single HTML element (possibly with
nested
* elements). For example, the following works, because each item is
contained
* within a single lt;ligt; element:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;ligt;lt;bgt;Name:lt;/bgt;{$oneItem.name}lt;/ligt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*
* But the following fails to lay out property, because there are two
HTML
* elements -- a span and a br -- per item:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;spangt;${oneItem.name}lt;/spangt;lt;br /gt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*/
@SupportsInformalParameters
public class Columns {
/**
* The number of columns to divide the items into
*/
@Property
@Parameter(value=5, defaultPrefix=literal)
private int number;
@Property
@Parameter(value=literal:t-column)
private String columnClass;
@Inject
private ComponentResources componentResources;
/**
* Manipulate the Tapestry-rendered DOM to insert as many DIV
elements as
* needed to break up the list of items in our body into the
requested
* number of columns. This method is only called after the body is
* rendered into the DOM.
*
* @param writer
*/
@AfterRenderBody
void manipulateTheDom(MarkupWriter writer)
{
Element container = writer.getElement();
// figure out how many items should go into each column
ListNode children = container.getChildren();
int numChildren = children.size();
int itemsPerColumn = numChildren / number;
int remainder = numChildren % number;
int itemNum = 0;
// render informal parameters into the container element
componentResources.renderInformalParameters(writer);
for (int columnNumber = 0; columnNumber number; columnNumber++)
{
int extras = (remainder 0) ? 1 : 0;
remainder--;
int numItemsthisColumn = itemsPerColumn + extras;
// Make a per-column wrapper element and move it to the
bottom
Element columnElement = container.element(div, class,
columnClass);
columnElement.moveToBottom(container);
// move some children into the new column wrapper element
for (int i = 0; i numItemsthisColumn; i++)
{
children.get(itemNum).moveToBottom(columnElement);
itemNum++;
}
}
}
}
On Wed, Jan 29, 2014 at 3:28 PM, Thiago H de Paula Figueiredo
thiag...@gmail.com wrote:
On Wed, 29 Jan 2014 17:58:08 -0200, Dimitris Zenios
dimitris.zen...@gmail.com wrote:
I am not sure whether i will be able to cast to collection.Maybe
tapestry
is doing some magic with BindParameter.
You don't need to cast it to a Collection, because Iterable is exactly
the
Java interface implemented by any class which provides an Iterator.
Just use
Iterable and its iterator() method directly.
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
Re: Loop and iterator
Nice implementation! :) But shouldn't this be better writen a mixin?
On Wed, 29 Jan 2014 19:57:19 -0200, Bob Harner bobhar...@gmail.com wrote:
Maybe this handy little component will help:
/**
* A Tapestry component that rearranges the HTML items in its body into
multiple
* columns. It accomplishes this by DOM manipulation after the body is
rendered
* to the DOM.
* p
* Note: For this to work properly, the items that you wrap this
component
* around must each consist of a single HTML element (possibly with
nested
* elements). For example, the following works, because each item is
contained
* within a single lt;ligt; element:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;ligt;lt;bgt;Name:lt;/bgt;{$oneItem.name}lt;/ligt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*
* But the following fails to lay out property, because there are two
HTML
* elements -- a span and a br -- per item:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;spangt;${oneItem.name}lt;/spangt;lt;br /gt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*/
@SupportsInformalParameters
public class Columns {
/**
* The number of columns to divide the items into
*/
@Property
@Parameter(value=5, defaultPrefix=literal)
private int number;
@Property
@Parameter(value=literal:t-column)
private String columnClass;
@Inject
private ComponentResources componentResources;
/**
* Manipulate the Tapestry-rendered DOM to insert as many DIV
elements as
* needed to break up the list of items in our body into the
requested
* number of columns. This method is only called after the body is
* rendered into the DOM.
*
* @param writer
*/
@AfterRenderBody
void manipulateTheDom(MarkupWriter writer)
{
Element container = writer.getElement();
// figure out how many items should go into each column
ListNode children = container.getChildren();
int numChildren = children.size();
int itemsPerColumn = numChildren / number;
int remainder = numChildren % number;
int itemNum = 0;
// render informal parameters into the container element
componentResources.renderInformalParameters(writer);
for (int columnNumber = 0; columnNumber number; columnNumber++)
{
int extras = (remainder 0) ? 1 : 0;
remainder--;
int numItemsthisColumn = itemsPerColumn + extras;
// Make a per-column wrapper element and move it to the
bottom
Element columnElement = container.element(div, class,
columnClass);
columnElement.moveToBottom(container);
// move some children into the new column wrapper element
for (int i = 0; i numItemsthisColumn; i++)
{
children.get(itemNum).moveToBottom(columnElement);
itemNum++;
}
}
}
}
On Wed, Jan 29, 2014 at 3:28 PM, Thiago H de Paula Figueiredo
thiag...@gmail.com wrote:
On Wed, 29 Jan 2014 17:58:08 -0200, Dimitris Zenios
dimitris.zen...@gmail.com wrote:
I am not sure whether i will be able to cast to collection.Maybe
tapestry
is doing some magic with BindParameter.
You don't need to cast it to a Collection, because Iterable is exactly
the
Java interface implemented by any class which provides an Iterator.
Just use
Iterable and its iterator() method directly.
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
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Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
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Re: Loop and iterator
You mean as a mixin applied to the Loop component? I guess so, but I
don't see how that would make it any better.
t:loop source=items value=item
t:mixins=Columns number=5 columnClass=foo
div${item.name}/div
/t:loop
Although that is a tiny bit more compact, I don't think it is as
clean, nor as general. Or maybe I misunderstand you.
On Wed, Jan 29, 2014 at 8:15 PM, Thiago H de Paula Figueiredo
thiag...@gmail.com wrote:
Nice implementation! :) But shouldn't this be better writen a mixin?
On Wed, 29 Jan 2014 19:57:19 -0200, Bob Harner bobhar...@gmail.com wrote:
Maybe this handy little component will help:
/**
* A Tapestry component that rearranges the HTML items in its body into
multiple
* columns. It accomplishes this by DOM manipulation after the body is
rendered
* to the DOM.
* p
* Note: For this to work properly, the items that you wrap this component
* around must each consist of a single HTML element (possibly with nested
* elements). For example, the following works, because each item is
contained
* within a single lt;ligt; element:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;ligt;lt;bgt;Name:lt;/bgt;{$oneItem.name}lt;/ligt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*
* But the following fails to lay out property, because there are two HTML
* elements -- a span and a br -- per item:
*
* pre
* lt;t:columns number=2gt;
* lt;t:loop source=myList value=oneItemgt;
* lt;spangt;${oneItem.name}lt;/spangt;lt;br /gt;
* lt;/t:loopgt;
* lt;/t:columnsgt;
* /pre
*/
@SupportsInformalParameters
public class Columns {
/**
* The number of columns to divide the items into
*/
@Property
@Parameter(value=5, defaultPrefix=literal)
private int number;
@Property
@Parameter(value=literal:t-column)
private String columnClass;
@Inject
private ComponentResources componentResources;
/**
* Manipulate the Tapestry-rendered DOM to insert as many DIV elements
as
* needed to break up the list of items in our body into the
requested
* number of columns. This method is only called after the body is
* rendered into the DOM.
*
* @param writer
*/
@AfterRenderBody
void manipulateTheDom(MarkupWriter writer)
{
Element container = writer.getElement();
// figure out how many items should go into each column
ListNode children = container.getChildren();
int numChildren = children.size();
int itemsPerColumn = numChildren / number;
int remainder = numChildren % number;
int itemNum = 0;
// render informal parameters into the container element
componentResources.renderInformalParameters(writer);
for (int columnNumber = 0; columnNumber number; columnNumber++)
{
int extras = (remainder 0) ? 1 : 0;
remainder--;
int numItemsthisColumn = itemsPerColumn + extras;
// Make a per-column wrapper element and move it to the bottom
Element columnElement = container.element(div, class,
columnClass);
columnElement.moveToBottom(container);
// move some children into the new column wrapper element
for (int i = 0; i numItemsthisColumn; i++)
{
children.get(itemNum).moveToBottom(columnElement);
itemNum++;
}
}
}
}
On Wed, Jan 29, 2014 at 3:28 PM, Thiago H de Paula Figueiredo
thiag...@gmail.com wrote:
On Wed, 29 Jan 2014 17:58:08 -0200, Dimitris Zenios
dimitris.zen...@gmail.com wrote:
I am not sure whether i will be able to cast to collection.Maybe
tapestry
is doing some magic with BindParameter.
You don't need to cast it to a Collection, because Iterable is exactly
the
Java interface implemented by any class which provides an Iterator. Just
use
Iterable and its iterator() method directly.
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
-
To unsubscribe, e-mail: dev-unsubscr...@tapestry.apache.org
For additional commands, e-mail: dev-h...@tapestry.apache.org
