just for clarity: JQuery is a Javascript library. Javascript doesn't have any relation to Java. Web2py also has nothing to do with Java. There is a misunderstanding when you talk about Java. And yes, to do what you need, you should have understanding javascript. JQuery is quite enough for a simple application with some ajax tricks like yours. If you want to develop a complex application with a rich UI, you have to study javascript much deeper, after that you won't have any questions about which library/framework you'd better use (D3, Vue, Angular, React, Backbone, Knockout, Ember ...+tons of others)
On Saturday, March 3, 2018 at 2:54:24 PM UTC+3, Matthew J Watts wrote: > > Ciao Massimo > > Thanks for getting back to me. Where do i start! As a beginner i'm > struggling to understand how i go developing the dependent /cascading drop > down list. > > There seems to be several concepts i need to learn to be able build this - > i could do with a few pointers - what should i study ? Should i put my > efforts into learn java ,Jquery and ajax, then things will get clearer? i > also want to incorporate data visualization into the app, so will think > about d3 too > > Sorry if i'm not making sense! > > Grazie > > Matt > > > > what do you want to do exctely? call a Java function from web2py? >> >> >> On Monday, 12 February 2018 11:56:59 UTC-6, Matthew J Watts wrote: >>> >>> Can anyone point me in the right direction with this, any good tutorial >>> out there on how i can integrate java and web2py? >>> >>> On Friday, February 9, 2018 at 12:05:32 PM UTC+1, Matthew J Watts wrote: >>>> >>>> Thanks for your reponse David! >>>> >>>> On Thursday, February 8, 2018 at 8:56:19 PM UTC+1, Dave S wrote: >>>>> >>>>> >>>>> >>>>> On Thursday, February 8, 2018 at 9:55:25 AM UTC-8, Matthew J Watts >>>>> wrote: >>>>>> >>>>>> Hi community >>>>>> >>>>>> I'm having a few problems trying to understand how create a cascading >>>>>> drop down list. I've followed this recipe - >>>>>> >>>>>> >>>>>> http://www.web2pyslices.com/slice/show/1526/cascading-drop-down-lists-with-ajax-2 >>>>>> >>>>>> i've managed to adapt it slightly, but i'm having trouble trying to >>>>>> add more tables to the cascade/sequence >>>>>> >>>>> >>>>> I'm not much of a menu person (I make use of ordinary anchor links for >>>>> the most part), but that example was probably written when BootStrap2 was >>>>> the css/javascript in use. Currently, web2py ships with BootStrap3, >>>>> which >>>>> doesn't support more than 1 level of submenus. If you use stupid.css (as >>>>> in applications/example), you might not have that limitation, but I can't >>>>> show you what you want. >>>>> >>>>> >>>>>> It is quite difficult for me (a beginner) to suss out the logic >>>>>> behind it >>>>>> >>>>>> >>>>> Menus typically control what is shown by using javascript to >>>>> manipulate CSS. Simple menus may be CSS only, but then they'd be >>>>> statically defined. >>>>> >>>>> Good luck! >>>>> >>>>> /dps >>>>> >>>>> >>>>> >>>>>> So at the moment i have the code below, what i'm trying to do is >>>>>> return a list of values from the "tax_class" table, based on a >>>>>> selection from the "tax_phylum" table( based on sececting an entry >>>>>> from the kingdom table) >>>>>> >>>>>> *model* >>>>>> >>>>>> db.define_table('tax_kingdom', >>>>>> Field('name')) >>>>>> >>>>>> db.define_table('tax_phylum', >>>>>> Field('name', 'string'), >>>>>> Field('kingdom_id')) >>>>>> db.tax_phylum.kingdom_id.requires = IS_IN_DB(db, db.tax_kingdom.id, >>>>>> '%(name)s') >>>>>> >>>>>> db.define_table('tax_class', >>>>>> Field('name', 'string'), >>>>>> Field('phylum_id')) >>>>>> db.tax_class.phylum_id.requires = IS_IN_DB(db, db.tax_phylum.id, >>>>>> '%(name)s') >>>>>> >>>>>> >>>>>> *Controller* >>>>>> >>>>>> def index(): >>>>>> kingdoms = db().select(db.tax_kingdom.ALL) >>>>>> >>>>>> if request.vars.kingdom_name: >>>>>> phylum_select = db(db.tax_phylum.id == >>>>>> request.vars.kingdom_name).select(db.tax_phylum.ALL) >>>>>> else: >>>>>> phylum_select = db(db.tax_phylum.id == >>>>>> 1).select(db.tax_phylum.ALL) >>>>>> return dict(kingdoms=kingdoms, phylum_select=phylum_select) >>>>>> >>>>>> >>>>>> def phylum(): >>>>>> phylums = db(db.tax_phylum.kingdom_id == >>>>>> request.vars.kingdom_name).select(db.tax_phylum.ALL) >>>>>> result = "" >>>>>> for p in phylums: >>>>>> result += "<option value='" + str(p.id) + "'>" + p.name + >>>>>> "</option>" >>>>>> return XML(result) >>>>>> >>>>>> >>>>>> >>>>>> *view* >>>>>> >>>>>> >>>>>> >>>>>> {{extend 'layout.html'}} >>>>>> >>>>>> <form enctype="multipart/form-data" action="{{URL()}}" method="post"> >>>>>> <select name='kingdom_name' >>>>>> onchange="jQuery('#kingdom_name').empty(); >>>>>> ajax('phylum', ['kingdom_name'], 'phylum_name');"> >>>>>> {{for kingdom in kingdoms:}} >>>>>> <option value="{{=kingdom.id}}" >>>>>> {{=" selected='selected'" if >>>>>> str(kingdom.id)==request.vars.kingdom_name else ""}}> >>>>>> {{=kingdom.name}} >>>>>> </option> >>>>>> {{pass}} >>>>>> </select> >>>>>> >>>>>> >>>>>> <select id='phylum_name' name='phylum_name' > >>>>>> <!-- loop through the index function i --> >>>>>> {{for phylum in phylum_select:}} >>>>>> <option value="{{=phylum.id}}" >>>>>> {{=XML(" selected='selected'") if >>>>>> str(phylum.id)==request.vars.phylum_name else ""}}> >>>>>> {{=phylum.name}}</option> >>>>>> {{pass}} >>>>>> </select> >>>>>> >>>>>> >>>>>> </form> >>>>>> >>>>>> -- >> Resources: >> - http://web2py.com >> - http://web2py.com/book (Documentation) >> - http://github.com/web2py/web2py (Source code) >> - https://code.google.com/p/web2py/issues/list (Report Issues) >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "web2py-users" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/web2py/hLmRiU-dhvM/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> web2py+un...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. 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