breadcrumb design

[Richard]

hello,

Does anyone have a neat breadcrumb link system for web2py?
http://en.wikipedia.org/wiki/Breadcrumb_(navigation)

Currently each of my controller functions define a menu variable like
this:
breadcrumbs = [A('Browse', _href=URL(...)), A('Book', _href=URL(...)),
'View']
And then the base view uses this to generate the links.
However this creates a lot of redundancy for deep links.

I remember in Django they use inheritance chains to build up the
breadcrumbs to avoid this redundancy. Is there a way to do something
like that in web2py?

Richard

[Alex Fanjul]

I agree with you Richard,
In deed, in statusbar there is already a "kind of breadcrumb" but
wihtout links...

A vote for this inbuild functionallity...
Otherwise, I bet that someone has a quick and simple idea to do this
with one function and getting the information from url app, controller,
function.

Alex F

--
Alejandro Fanjul Fdez.
alex....@gmail.com
www.mhproject.org

[Alex Fanjul]

Any good pattern / shortcut to do this? (breadcrumbs)

thanks
alex f

El 17/07/2009 2:45, Richard escribió:

[Richard]

On Jul 17, 10:52 am, Alex Fanjul <alex.fan...@gmail.com> wrote:
> I agree with you Richard,
> In deed, in statusbar there is already a "kind of breadcrumb" but
> wihtout links...
>
> A vote for this inbuild functionallity...
> Otherwise, I bet that someone has a quick and simple idea to do this
> with one function and getting the information from url app, controller,
> function.

hmm, doing it automatically from the URL might work for me if I plan
it right.
Does anyone else already have their own breadcrumb system?

Richard

[Richard]

hi Alex,

I am now using this automatic breadcrumb function:


def breadcrumbs():
"Create breadcrumb links for current request"
# make links pretty by capitalizing and using 'home' instead of
'default'
pretty = lambda s: s.replace('default', 'home').replace('_', '
').capitalize()
menus = [A('Home', _href=URL(r=request, c='default', f='index'))]
if request.controller != 'default':
# add link to current controller
menus.append(A(pretty(request.controller), _href=URL
(r=request, c=request.controller, f='index')))
if request.function == 'index':
# are at root of controller
menus[-1] = pretty(request.controller)
else:
# are at function within controller
menus.append(pretty(request.function))
return XML(' > '.join(str(m) for m in menus))


Has anyone else got a system they can share?
Richard

[Alexandre Andrade]

I improved the function and put it at http://www.web2pyslices.com/main/slices/take_slice/46

Features:

• links in every breadcrumb
• can set a breadcrumb to args
• can localize/personalize the controllers - using T()

Thanks to Richard <richardbp(at)gmail.com>, for original function that I made improvements

Put in your model/module:

    def breadcrumbs(arg_title=None):

       "Create breadcrumb links for current request"

       # make links pretty by capitalizing and using 'home' instead of 'default'

       #pretty = lambda s: s.replace('default', 'Início').replace('_', ' ').capitalize()

       menus = [A(T('Home'), _href=URL(r=request, c='default', f='index'))]

       if request.controller != 'default':
           # add link to current controller

           menus.append(A(T(pretty(request.controller)), _href=URL(r=request, c=request.controller, f='index')))

           if request.function == 'index':
               # are at root of controller

               menus[-1] = A(T(pretty(request.controller)), _href=URL(r=request, c=request.controller, f=request.function))

           else:
               # are at function within controller

               menus.append(A(T(pretty(request.function)), _href=URL(r=request, c=request.controller, f=request.function)))
           # you can set a title putting using breadcrumbs('My Detail Title') 

           if request.args and arg_title:
               menus.append(A(T(arg_title)), _href=URL(r=request, c=request.controller, f=request.function,args=[request.args]))
       else:
           #menus.append(A(pretty(request.controller), _href=URL(r=request, c=request.controller, f='index')))

           if request.function == 'index':
               # are at root of controller

               #menus[-1] = pretty(request.controller)
               pass
               #menus.append(A(pretty(request.controller), _href=URL(r=request, c=request.controller, f=request.function)))

           else:
               # are at function within controller

               menus.append(A(T(pretty(request.function)), _href=URL(r=request, c=request.controller, f=request.function)))
           # you can set a title putting using breadcrumbs('My Detail Title') 

           if request.args and arg_title:
               menus.append(A(T(arg_title), _href=URL(r=request, f=request.function,args=[request.args])))

       return XML(' > '.join(str(m) for m in menus))

To use, put in your view:

 {{=breadcrumbs() }}

or

  {{=breadcrumbs('My Title for request.args ') }}

------------------------------------------------------------

2009/8/7 Richard <rich...@gmail.com>

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Atenciosamente

--
=========================
Alexandre Andrade
Hipercenter.com

[JorgeRpo]

On Dec 28, 3:45 pm, Alexandre Andrade <alexandrema...@gmail.com>
wrote:

> I improved the function and put it athttp://www.web2pyslices.com/main/slices/take_slice/46
>
> Features:
>

>    - links in every breadcrumb
>    - can set a breadcrumb to args
>    - can localize/personalize the controllers - using T()

> 2009/8/7 Richard <richar...@gmail.com>

> > web2py+un...@googlegroups.com<web2py%2Bunsu...@googlegroups.com>

> > For more options, visit this group at
> >http://groups.google.com/group/web2py?hl=en
> > -~----------~----~----~----~------~----~------~--~---
>
> --
> Atenciosamente
>
> --
> =========================
> Alexandre Andrade
> Hipercenter.com

Hmmmm

You should make a little effort and create a menu plugin too. ;)

They have similarities with a breadcrumb ..

--
sig text

[Alexandre Andrade]

I don't know the specs to do a plugin.

I posted a message yesterday about it but have no answers

2009/12/28 JorgeRpo <jorg...@gmail.com>

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[Alexandre Andrade]

I think it is what you want:

http://www.web2pyslices.com/main/slices/take_slice/3

while it can be improved

2009/12/28 JorgeRpo <jorg...@gmail.com>

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[Alex Fanjul]

I don't know if I have problems with my email (cause nobody responded me the last ones asking for help), anyway next try:
Thank you so much Alexandre, I think is a very useful bit of code because this feature (breadcumbs) its a must for web 2.0 nowdays, and from my point of view I think it should be included in web2py framework.
After trying to review and understand your code, the most impressive part (for a Java ex-programmer like me) its this little line: ***return XML(' > '.join(str(m) for m in menus))***

Alex F

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[Richard]

neat!

On Dec 29, 7:45 am, Alexandre Andrade <alexandrema...@gmail.com>

wrote:
> I improved the function and put it athttp://www.web2pyslices.com/main/slices/take_slice/46
>
> Features:
>
>    - links in every breadcrumb

>    - can set a breadcrumb to args
>    - can localize/personalize the controllers - using T()

> 2009/8/7 Richard <richar...@gmail.com>

> > web2py+un...@googlegroups.com<web2py%2Bunsu...@googlegroups.com>

[Alexandre Andrade]

I make a new version, "Full Breadcrumb"  for applications that use nested functions, where you want the user pass by a function first to go to another, so you can set the parent functions, getting the history of navigation or hide the own function

http://www.web2pyslices.com/main/slices/take_slice/47

2009/12/29 Richard <rich...@gmail.com>

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[Alex Fanjul]

Sorry I don't understand you, could you put an example please?
Alex F

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