Howto's at the bottom of the page... Perhaps we should move the contents
of that page to the main wiki page... I already did...
Martijn
Jonathan Carlson wrote:
Thanks Martijn, You read my mind. :-)
I didn't see a link to it on the main Wiki page. How are people going
to find it?
[EMAIL PROTECTED] 2005-04-19 2:43:47 AM >>>
I have put this on the wiki
(http://wicket.sourceforge.net/wiki/doku.php?id=user:building_wizard_functionality),
as this is a recurring question...
Martijn
Eelco Hillenius wrote:
There are generally two ways of doing this (I think):
1. Page oriented. Create a page for each step, and record your status
by either passing it to the step pages as you construct them.
2. Panel oriented, using:
a. 'replace'. This way you have one panel (e.g. 'mywizPanel'),
where your step part of the wizzard is in. On a next step, replace
the
current panel with the next one. The advantage of this is that it is
flexible (doesn't matter how many steps you have, you can allways
replace the panel with an arbitrairy other one. You let Wicket handle
back-button support (Wicket will record undo's using a memento like
pattern).
b. 'set/isVisible'. Here you create all instances of the panels
you
need beforehand, and put them all on the page (or wizzard panel),
using different names (e.g. 'myWizStep1' and 'myWizStep2'). The trick
here is the set only the one visible that is currently active (thus
all others are not rendered). The advantage of this is that you only
create the instances once, and that you don't have to record changes
for backbutton support. However, it consumes more memory upfront, and
you have to know your panel steps beforehand.
With 2, I would record the wizzard state with the parent (page or
another panel).
Another thing that might be a good idea, is to use command patterns
for navigation actions. For example, I use this for a project:
public interface INavigationAction
{
void navigate(RequestCycle requestCycle);
}
/** action to navigate back to this page. */
private final INavigationAction backToThisPageNavigationAction =
new INavigationAction()
{
public void navigate(RequestCycle requestCycle)
{
requestCycle.setResponsePage(VenueListPage.this);
}
};
and then have something like:
public VenueDetailsPage(Long venueId, INavigationAction
backNavigationAction)
{
...
add(new Link("cancelButton")
{
public void onClick()
{
backNavigationAction.navigate(getRequestCycle());
}
});
....
Anyway, that's just an idea. You might come up with a more elegant
pattern, or you might be happy with a tight coupling between the
wizzard steps.
Regards,
Eelco
Matthew Watson wrote:
Hi,
I need to create a complicated wizard composed of numerous screens
and
buttons to navigate arround them.
Using wicket whats the best approach to take? I know this is a
fairly
general question but I'm not entire sure where to start.
Thanks in advance,
Matt
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