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Thanks David for the links.
After reread the API, I find the cause is that I
didn't give the string type for the text with the
insert tag. So, the problem is solved by either adding
the type of string or using the getAsString tag
instead.
My test shows that the dummy component definitions in
the template have no impact in this regard.
Vernon
--- "David G. Friedman" <[EMAIL PROTECTED]> wrote:
> Vernon,
>
> Have you read "Tiles Advanced Features" by Cedric
> Dumoulin? It is listed
> under the Struts userGuide section for Tiles,
> http://struts.apache.org/userGuide/dev_tiles.html
> with a direct URL of:
>
http://www.lifl.fr/~dumoulin/tiles/tilesAdvancedFeatures.pdf
>
> Read all subsections under section 4.1 as it will
> better explain (and with
> examples) what I was talking about.
>
> I am unsure if this is a requirement or just
> something I learned through
> trial and error, but when I extend a definition and
> add a new component, I
> make sure to add it to every parent tile (i.e.
> "this" extended "that" so I
> add the fields to "that", but "that" extended
> "another" so I added those
> same component names with some default value to
> "another.") back up the tree
> of definitions. If you do not define attributes in
> that strict a manner,
> you may fine, as other posters have discovered, that
> some tiles' JSP
> pieces/pages may not be able to see your attributes,
> especially if your
> "body" component is a JSP that needs access to the
> other tile components.
> I'm not explaining this well but the PDF is
> excellent in describing tiles
> concepts with numerous examples.
>
> Regards,
> David
>
> -----Original Message-----
> From: Vernon [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, January 12, 2005 8:39 PM
> To: Struts Users Mailing List
> Subject: RE: [Tiles] Why the text doesn't show
>
>
> David:
>
> After I add empty strings for all insertion
> components
> in the definition xml file, nothing is changed.
>
> When you said "rule of thumb", do you mean what is
> in
> the document or a hacking practice?
>
> regards,
>
> Vernon
> >
> > The way I've always used Tiles is different from
> > your approach. In the
> > struts-tiles.xml definition file, my "template"
> > could contain the components
> > "title", "category", and "category_menu" with
> dummy
> > values. The two tiles
> > derived from "template", i.e. "landscape" and
> > "water", would
> > overload/override those fields as necessary. If
> you
> > define an component
> > named "styleSheet" in "landscape" but not in
> > "template", when the page
> > starts displaying the master tile (i.e.
> "template"'s
> > /WEB-INF/jsp/template/main.jsp JSP), the master
> tile
> > won't know about the
> > "styleSheet" component you defined in the later
> > child tile named
> > "landscape."
> >
> > My rule of thumb is that you define all components
> > in the master tile(s).
> > For any tile you extend, make sure you are only
> > overriding previously
> > defined components as you need them. They can
> > initially be set to blank,
> > i.e. "", in "template" so nothing shows up in the
> > JSP unless you've
> > overridden it in the "landscape" or "water" tiles.
> > Why? Nesting and
> > passing components can be difficult or awkward in
> > Tiles if you are not VERY
> > careful.'
> >
> > Regards,
> > David
> >
> > -----Original Message-----
> > From: Vernon [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, January 12, 2005 3:26 PM
> > To: Struts Users Mailing List
> > Subject: RE: [Tiles] Why the text does'nt show
> >
> >
> > Thanks for your response, David. And please see
> > below.
> >
> > "David G. Friedman" <[EMAIL PROTECTED]> wrote:
> >
> > >
> > > A few things come to mind with your below
> included
> > > details:
> > >
> > > 1: Where are the "taglib" statements in your
> > > main.jsp template?
> >
> > The taglib statement is there as the following:
> >
> > <%@ taglib prefix="tiles"
> > uri="http://jakarta.apache.org/struts/tags-tiles";
> %>
> >
> > Absenting of the statement will lead to miss all
> > insertions. In this case, only inserted text is
> > missing.
> >
> > >
> > > 2: To use "title" when you "extend" a master
> > > template, I'm pretty sure you
> > > MUST have a "title" component listed in your
> > master
> > > template too because you
> > > are orverriding it in your "landscape" or
> "water"
> > > templates.
> > >
> >
> > I don't follow above. The inheritance is the
> > following:
> >
> > water <- landscape <- template
> >
> > Nothing, including the "title", is overriden.
> >
> > > -----Original Message-----
> > > From: Vernon [mailto:[EMAIL PROTECTED]
> > > Sent: Wednesday, January 12, 2005 2:02 PM
> > > To: user@struts.apache.org
> > > Subject: [Tiles] Why the text does'nt show
> > >
> > >
> > > In a project, I have the Tiles integrated with
> > > Spring.
> > > The inserted JSP files show up properly, but not
> > > text.
> > > I can't find the cause. Here is a segment of the
> > > template file
> > >
> > > <html xmlns="http://www.w3.org/1999/xhtml";
> > > xml:lang="en">
> > > <head>
> > > <meta http-equiv="Content-Type"
> > > content="text/html;
> > > charset=utf-8" />
> > > <link rel="stylesheet" type="text/css"
> > > href="css/layout.css" />
> > > <style type="text/css">
> > > @import "css/text.css";
> > > </style>
> > > <title><tiles:insert name="title"/></title>
> > > </head>
> > > <body>
> > > ...
> > >
> > > In the definition file:
> > >
> > > <!-- DEFAULT MAIN TEMPLATE -->
> > > <definition name="template"
> > > page="/WEB-INF/jsp/template/main.jsp">
> > > </definition>
> > >
> > > <definition name="landscape"
> extends="template">
> > > <put name="title" value="Landscape"/>
> > > <put name="category" value="LANDSCAPE"/>
> > > <put name="category_menu"
> > > value="/WEB-INF/jsp/mountains/category.jsp"
> > > type="page"/>
> > > </definition>
> > >
> > > <definition name="water" extends="landscape">
> > > <put name="sub_category_menu"
> > > value="/WEB-INF/jsp/water/sub_category.jsp"
> > > type="page"/>
> > > </definition>
> > >
> > >
> > > What is missing here?
>
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