Howard Ship wrote:
> There's no reason why you couldn't have,
> in your script, ...
>
> <body>
>
> ...
>
> var myVariable = ....;
>
> function ${some.symbol)()
> {
> myVariable = ....;
> }
That'd be true as long as there is only a single component associated with
the script. In this case I want to include multiple components on a page,
each of which can set the value of a single global variable. For example,
in the case of a MenuItem I have a page containing the following:
<component id="menu1" type="MenuItem">
<binding name="default" expression="assets.menu1_default"/>
<binding name="select" expression="assets.menu1_selected"/>
</component>
<component id="menu2" type="MenuItem">
<binding name="default" expression="assets.menu2_default"/>
<binding name="select" expression="assets.menu2_selected"/>
</component>
Each menu item knows how to manage its images and, of the group, there's a
single 'selected' item whose value is stored in the global. If I declare
the global inside MenuItem.script, it gets duplicated for each component
when the page is generated. If, instead, I pop it into a include-script, it
only shows up once and therefore acts as a global variable that can be set
by any of the components. I suppose I could also drop it into the page
script that wraps the components but that doesn't seem to be a very good
solution since the variable would then be separated from the components that
care about it. It also assumes that I have a page script which, in this
case, I don't.
Ideally, I'd like to have a place in the script where I could declare vars
that only show up once regardless of the number of components wrapped on a
page. Perhaps something like this:
<global>
<!-- only appears once -->
var myVariable;
</global>
<body>
function ${onMouseClick}()
<!-- do something with remembered object -->
if (myVariable != undefined) {
do something ...;
}
<!-- remember object for next time -->
myVariable = ${somesymbol}
}
</body>
So, when the page is generated you get something like this:
function click_menuitem_0()
{
if (myVariable != undefined) {
do something ...;
}
myVariable = document.menuitem_0;
}
function click_menuitem_1()
{
if (myVariable != undefined) {
do something ...;
}
myVariable = document.menuitem_1;
}
Hope this makes some sense. I'm still getting to know Tapestry, so if I'm
missing something or there are other ways to approach the problem let me
know.
-------------------------------------------------------
In remembrance
www.osdn.com/911/
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