James:
The navigation framework we have can also manage complex navigations with
different actions perhaps in differents use cases, for example:
[listCustomers.jsp (is Checkpoint)] -> (vierDetailCustomer) -> [detailCustomer.jsp]
[detailCustomer.jsp] -> (listOperators) -> [listOperators.jsp]
>From listOperators.jsp you could go a step back (to detailCustomer.jsp)
or cancel the process and go to a checkpoint (listCustomers.jsp).
In fact, you could have multiples types of steps (standard, checkpoint,
home, etc) and all is configured in web.xml and a configuration file (xml
based) with no need of extending the request processor nor extending a base
action:
An example of this configuration is:
<navigation>
<action path="/FirstNavigation">
<method name="unspecified" stepType="checkpoint" repopulate="true"/>
<method name="step2" stepType="checkpoint"/>
</action>
</navigation>
By default, all steps are standard, the configuration is to override the
default behaviour.
If you want to take a look, let me know. The code we have comes tith an
example that manages a navigation as show in the gif I'm attaching.
In the struts config, you can configure the actions to manage the backwards
navigation:
<global-forwards>
<forward name="stepBack" path="/stepBack.do"/>
<forward name="stepToCheckPoint" path="/stepToCheckPoint.do"/>
<forward name="undoStep" path="/undoStep.do"/>
<forward name="gotoCheckPoint" path="/gotoCheckPoint.do"/>
</global-forwards>
<action path="/stepBack"
type="net.sf.opentranquera.ui.struts.navigation.actions.StepBackAction"/>
<action path="/stepToCheckPoint"
type="net.sf.opentranquera.ui.struts.navigation.actions.StepToCheckPointAction"/>
<action path="/undoStep"
type="net.sf.opentranquera.ui.struts.navigation.actions.UndoStepAction"/>
<action path="/gotoCheckPoint"
type="net.sf.opentranquera.ui.struts.navigation.actions.GotoCheckPointAction"/>
In the action or validation, you could do as follows to return to the last
step (input page)
return mapping.findForward("undoStep");
And in a method completion, when you want to return to the list (for example
a checkpoint) you could do as follows:
return mapping.findForward("gotoCheckPoint");
In the web.xml, you declare the navigation filter:
<filter>
<filter-name>navigationStack</filter-name>
<filter-class>
net.sf.opentranquera.ui.struts.navigation.NavigationFilter
</filter-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/navigation-config.xml</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>navigationStack</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>
Cheers.
Guillermo.
>-- Mensaje original --
>Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>From: James Sheridan <[EMAIL PROTECTED]>
>To: 'Struts Users Mailing List' <[EMAIL PROTECTED]>
>Subject: RE: Back navigation using application back buttons
>Date: Wed, 28 Jul 2004 08:43:11 +0100
>
>
>Thanks Niclas for the ideas.
>
>While I think the currentPage/lastPage hidden field idea would work for
the
>simple case I outlined, I don't think it would work for slightly more
>complex case (requirements changing already :-), eg.
>
>(original) Page1->Page3->Page2->(back)->Page3
>(extended) Page1->Page3->Page2->(back)->Page3->(back)->Page1
>
>The scheme would be fine until the last (back) at which point the (back)
>would go the Page2 rather than Page1. The essential problem with the scheme
>I think is that it cannot 'remember' further back that previous page, and
>I
>believe the full navigation history needs to be remembered somehow in order
>to navigate back via the original forward path. This is why I was thinking
>of implementing the 'page stack' idea.
>
>However, I must point out that I am very new to Struts and perhaps I am
>missing something. For example perhaps there is some way to preserve the
>hidden fields from previous invocations of pages when navigating back to
>them ?
>
>-- James
>
>-----Original Message-----
>From: Meier, Niclas [mailto:[EMAIL PROTECTED]
>Sent: 27 July 2004 19:06
>To: Struts Users Mailing List
>Subject: RE: Back navigation using application back buttons
>
>
>Hello,
>
>You can try two hidden fields fort he 'currentPage' and 'lastPage'. When
>you
>submit any form with the 'next'-Button you can evalute the request determine
>the next page in your process. If you proceed with the back button, you
can
>go back the the last page:
>
>Example 1
>Page 1 (c:1, l:undef) -[fwd]-> Page 2 (c:2, l:1) -[back]-> Page 1 (c:1,
l:2)
>
>
>Example 2
>Page 1 (c:1, l:undef) -[fwd]-> Page 3 (c:3, l:1) -[fwd]-> Page 2 (c:2,
l:3)
>-[back]-> Page 3 (c:3, l:2)
>
>You can implement this function into Abstract classes (From and Action)
to
>handle the whole navigation. Or you create a dispatcher which all pages
>configured into.
>
> <action path="/foo/dispatcher" name="naviForm"
>type="com.foo.struts.DispatcherAction">
> <forward name="1" path="/pages/page1.jsp"/>
> <forward name="2" path="/pages/page2.jsp"/>
> <forward name="3" path="/pages/page2.jsp"/>
> </action>
>
>A good idea maybe the seperation of request handling of the page form,
which
>is related to the page and some stuff you need to prepare the view. I often
>use this pattern with great success.
>
>{Form on Page 1} -[submit]-> FormOneRequestHandlingAction -[forward]->
>DispatcherAction -[forward]-> ViewPreparingActionPageTwo -[forward] ->
>Page2.jsp
>
>The first two actions can decide to return to page 1 and the third action
>will always forward to the jsp.
>
>Regards
>Niclas
>
>-----Original Message-----
>From: James Sheridan [mailto:[EMAIL PROTECTED]
>Sent: Tuesday, July 27, 2004 4:51 PM
>To: '[EMAIL PROTECTED]'
>Subject: Back navigation using application back buttons
>
>Hi,
>
>I am trying to implement a simple Back mechanism which uses Back buttons
>in
>the page (encouraging users to use this rather than browser Back which
is
>not a good idea). Lets call the pages Page1 and Page2. A Page 1 action
>brings user to Page 2. Page 2 has a Back button. The basic mechanism is
>trivial, ie. an action handler for Page 2 Back which forwards to Page1.
>However the problem is I want to be able to go Back to pages other than
>Page1 since the user can also get to Page 2 via Page3. ie. I want to be
able
>to do
> Page1->Page2->(back)->Page1
> Page1->Page3->Page2->(back)->Page3
>Is there some way to control the forwarding for the Page2 Back handling
and
>know which page to go back to ? The 'static' mappings I would set up in
>struts-config.xml appear to only allow me to configure navigation back
to
>one specific page. I was considering implementing a 'page stack' object
and
>passing it as a session attribute but I would have hoped that the Struts
>framework would make this possible in some easy way.
>
>I suppose some of the wizard ideas might help but a wizard is essentially
>different from what I cam trying to achieve in the sense that Back in a
>wizard always go back to a specific page.
>
>Any help would be greatly appreciated.
>
>-- James
>
>
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