Hi Madhav,
I'm also planning to create a Breadcrumb component.
My philosophie about breadcrumb is the it shows the position of the page
in the site map and note the position of the page in the user navigation
history. According to this you eliminate the problem of the browser back
button.
For me there is two possibilities :
- each page know where it is.
- only an object defined as a Site Map Manager, know where is a page.
Using the second possibility, you can imagine that each page give its
name to the Site Map Manager and then this one give back a list
representing labels and actions for the breadcrumb.
This is what I want to do but my biggest probleme is that I don't know
how to pass an attribute from a jsp to a Bean, before rendering the
jsp...
regards,
Marc Amir-Tahmasseb
_____
From: Madhav Bhargava [mailto:[EMAIL PROTECTED]
Sent: 21 February 2007 10:44
To: MyFaces Discussion
Subject: breadcrumb design
Hi All,
I am in the process of creating a component for breadcrumb
generation for my project.
I have following in mind:
1. Create a custom component for breadcrumb, with a
renderer and a tag class.
2. Create a model bean that will back this component and
will contain the latest breadcrumb links and their navigation outcomes.
This bean will be at the session level
3. Create a breadcrumb event and queue that event in the
decode method of the renderer. This event will then be broadcasted to
all the interested listeners. In my case it will be the left menu which
will have to reflect where the user is.
Every page which requires a breadcrumb will have a breadcrumb
tag defined in the page.
There will be a hidden field on every page that will store the
depth (or the index of the last link) of the breadcrumb. Using this
value the list of links in the model will be updated.
Following are some problems that I am currently facing:
1. There can be many links present all over the place which
can result in the page control going to some page else which means that
there will be a change in the breadcrumb as well. How do you capture
such events and make the breadcrumb change?
2. How do you take care of the browser back button?
Regards,
Madhav
