Cool - thanks! kind regards
Tobias > Am 01.04.2016 um 14:56 schrieb Martin Grigorov <mgrigo...@apache.org>: > > I've added an example with > https://github.com/apache/wicket/commit/2417322673238d57a794c237e84dd5dacf890804 > > I think we should explain that those are just convenience. It is better to > use the "old way" one cares about memory usage. I'll add it soon. > > Martin Grigorov > Wicket Training and Consulting > https://twitter.com/mtgrigorov > > On Fri, Apr 1, 2016 at 2:48 PM, Tobias Soloschenko < > tobiassolosche...@googlemail.com> wrote: > >> Hi, >> >> would be great to see some information how to use lambda models in the >> user guide. >> >> kind regards >> >> Tobias >> >>>> Am 01.04.2016 um 13:57 schrieb Martin Grigorov <mgrigo...@apache.org>: >>>> >>>> On Fri, Apr 1, 2016 at 12:45 AM, Sven Meier <s...@meiers.net> wrote: >>>> >>>> Hi, >>>> >>>> yeah, of course this is right: >>>> >>>> protected void onComponentTag(final ComponentTag tag) { >>>> >>>> if (getModelObject().doubleValue() < 0.0) { >>>> tag.put("class", " negative"); >>>> } >>>> } >>>> >>>> Otherwise you'll end up with one additional behavior for each render - >>>> stupid copy-paste error :/. >>>> >>>> BTW this might be an additional candidate for the new Wicket 8 lambdas: >>>> >>>> label.add(onTag(tag -> if (getModelObject().doubleValue() < 0.0) >>>> tag.put("class", "negative") )); >>> >>> +1 >>> >> >> +1 >> >>> >>>> >>>> Sven >>>> >>>> >>>> >>>>> On 31.03.2016 21:16, Martin Grigorov wrote: >>>>> >>>>> Hi, >>>>> >>>>> On Thu, Mar 31, 2016 at 4:29 PM, Sven Meier <s...@meiers.net> wrote: >>>>> >>>>> Hi, >>>>>> >>>>>> you can access a component's model with #getDefaultModel() or - if it >> is >>>>>> a >>>>>> generic component - with #getModel(). >>>>>> >>>>>> To properly 'bind' to a model you should delay invocation of >> #getObject() >>>>>> as late as possible, so better overwrite #onComponentTag(): >>>>>> >>>>>> protected void onComponentTag(final ComponentTag tag) { >>>>>> >>>>>> if (getModelObject().doubleValue() < 0.0) { >>>>>> add(new AttributeAppender("class", " negative")); >>>>>> >>>>>> Since you are in #onComponentTag() there is no reason to add a >> Behavior. >>>>> Just use the tag: tag.append("class", "negative", " "); >>>>> >>>>> >>>>> } >>>>>> } >>>>>> >>>>>> >>>>>> Have fun >>>>>> Sven >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On 31.03.2016 16:06, Ron Smits wrote: >>>>>> >>>>>> I have searched but I dont find a clear way of getting the model when >> one >>>>>>> is creating a custom component: >>>>>>> >>>>>>> >>>>>>> public MoneyLabel(String id) { >>>>>>> super(id); >>>>>>> add(new AttributeAppender("class", " number")); >>>>>>> } >>>>>>> >>>>>>> It sounds like you always need the model. >>>>> If there is a CompoundPropertyModel in the parents' hierarchy then move >>>>> your logic to #onComponentTag(), as per Sven's suggestion. >>>>> If there is no CPM in the parents then just remove this constructor. >>>>> >>>>> >>>>> public MoneyLabel(String id, Model<? extends BigDecimal> >> bigDecimalModel) >>>>>>> { >>>>>>> super(id, bigDecimalModel); >>>>>>> add(new AttributeAppender("class", " number")); >>>>>>> if (bigDecimalModel.getObject().doubleValue() < 0.0) { >>>>>>> add(new AttributeAppender("class", " negative")); >>>>>>> } >>>>>>> } >>>>>>> >>>>>>> In the second constructor I can use the supplied model to determine >> to >>>>>>> add >>>>>>> the negative class. However in the first constructor I cannot find a >> way >>>>>>> to >>>>>>> access the model. >>>>>>> >>>>>>> What am I missing? >>>>>>> >>>>>>> Ron >>>>>>> >>>>>>> >>>>>>> >>>>>>> --------------------------------------------------------------------- >>>>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >>>>>> For additional commands, e-mail: users-h...@wicket.apache.org >>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >>>> For additional commands, e-mail: users-h...@wicket.apache.org >>>> >>>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org >> For additional commands, e-mail: users-h...@wicket.apache.org >> >> --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
