RE: Updating form fields on dropdown selection change
No replies... that must mean something... let's try rewording. I need to build several forms with: 1. Several text fields each, bound to several String properties of a single bean through a CompoundPropertyModel. This is a requirement unless it renders all the rest impossible to implement. 2. One DropDownChoice each, bound to a field of the same bean, likely through a PropertyModel, but this model type is not a requirement. 3. The DropDownChoice must update some of the text fields when the user selects an item while keeping input in other text fields intact. Is that possible at all with wicket? If yes, how? I've already tried adding an AjaxFormComponentUpdatingBehavior(onchange) to the DropDownChoice and, meanwhile, updating the bean String properties in the onSelectionChanged method, but doing so the text fields do not get updated in the form (or the update is reverted so fast I can't see it actually happened). The onSelectionChanged method is being called after the onUpdate method. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Updating form fields on dropdown selection change
Hi, On Fri, Aug 16, 2013 at 10:58 AM, Lucio Crusca lu...@sulweb.org wrote: No replies... that must mean something... let's try rewording. I need to build several forms with: 1. Several text fields each, bound to several String properties of a single bean through a CompoundPropertyModel. This is a requirement unless it renders all the rest impossible to implement. 2. One DropDownChoice each, bound to a field of the same bean, likely through a PropertyModel, but this model type is not a requirement. 3. The DropDownChoice must update some of the text fields when the user selects an item while keeping input in other text fields intact. Is that possible at all with wicket? If yes, how? Everything is possible. Just different tasks take different time to implement. What did you try and what issues you faced so far ? I've already tried adding an AjaxFormComponentUpdatingBehavior(onchange) to the DropDownChoice and, meanwhile, updating the bean String properties in the onSelectionChanged method, but doing so the text fields do not get onSelectionChanged() is non-Ajax update. Using AjaxFormComponentUpdatingBehavior(onchange) is Ajax update. updated in the form (or the update is reverted so fast I can't see it actually happened). The onSelectionChanged method is being called after the onUpdate method. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Updating form fields on dropdown selection change
Everything is possible. Just different tasks take different time to implement. What did you try and what issues you faced so far ? Please see my previous message. To recap, I tried a mix you just told me it can't work: I added the TextFields to the AjaxRequestTarget while updating the bean in the onSelectionChanged method. I didn't know they could not work together. onSelectionChanged() is non-Ajax update. Using AjaxFormComponentUpdatingBehavior(onchange) is Ajax update. Ok, but I need to know the selected item in order to update the String properties accordingly. AjaxFormComponentUpdatingBehavior(onchange) doesn't tell me the selected item, while onSelectionChanged seems to be the wrong way to accomplish what I'm trying to do (see the first post of Paul Bors in this thread). - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Updating form fields on dropdown selection change
On Fri, Aug 16, 2013 at 12:12 PM, Lucio Crusca lu...@sulweb.org wrote: Everything is possible. Just different tasks take different time to implement. What did you try and what issues you faced so far ? Please see my previous message. To recap, I tried a mix you just told me it can't work: I added the TextFields to the AjaxRequestTarget while updating the bean in the onSelectionChanged method. I didn't know they could not work together. onSelectionChanged() is non-Ajax update. Using AjaxFormComponentUpdatingBehavior(onchange) is Ajax update. Ok, but I need to know the selected item in order to update the String properties accordingly. AjaxFormComponentUpdatingBehavior(onchange) doesn't tell me the selected item, while onSelectionChanged seems to be the wrong way to accomplish what I'm trying to do (see the first post of Paul Bors in this thread). AjaxFormComponentUpdatingBehavior updates the DropDownChoice's model. You can use it to read the newly selected value. Don't use onSelectionChanged() at all if you want to use Ajax. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
RE: Updating form fields on dropdown selection change
Take a look at how one drop-down updates the other via Ajax in the Wicket Examples at: http://www.wicket-library.com/wicket-examples/ajax/choice I suggest you do something similar instead of trying to re-implement part of the form processing in your code. I've tried to follow that example and implement something similar in my code, however I had hard time in making it work (I didn't manage to) and I found there are two differences between sample code and my code that make me suspect it can't apply to my case. First, I use CompundPropertyModels instead of AbstractReadonlyModels, and they are so handy that it would be a real pity having to write models myself, but I hope that's doesn't make a real difference. Second I have a CompoundPropertyModel that manages the whole bean: the bean fields match the form fields, and one of those fields is the @ManyToOne (DropDownChoice) and it should update (onchange) a few other fields of the same bean, but not all of them. In the sample code there are two different models instead, one for each form field. For the DropDownChoice I create a PropertyModel on demand just for it, but I don't keep a reference to it. My code is: DropDownChoiceQ ddc = new DropDownChoice(id, new PropertyModelQ(instanceOfTheMany, manyToOneFieldName), elementsList, choiceRenderer); Please note that instanceOfTheMany is my bean with the @ManyToOne field and that the same bean is being managed by the CompoundPropertyModel in the form. Now changing that logic in my case is possible but quite troublesome, so I'd go down that path only if you tell me my current code is broken and it's the cause of my problems. Just in case you tell me that, if you could add some hint about how to make it correct it would be very appreciated. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Updating form fields on dropdown selection change
I have a DropDownChoice that should update some form fields when the user selects an item. My selection-changed-listener code is along the lines of: form.modelChanging(); T obj = model.getObject(); obj.setFoo(newSelection.getFoo()); obj.setBar(newSelection.getBar()); form.modelChanged(); form.clearInput(); form.visitChildren(); The problem is that without clearInput() the form fields do not update, while with clearInput they do update, but I loose any input also in fields other than FOO and BAR. I need a way to update only FOO and BAR fields and let other fields alone so that they keep their current user input. Thanks in advance for your help. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
RE: Updating form fields on dropdown selection change
Take a look at how one drop-down updates the other via Ajax in the Wicket Examples at: http://www.wicket-library.com/wicket-examples/ajax/choice I suggest you do something similar instead of trying to re-implement part of the form processing in your code. Besides, what is going to happen when the next version of Wicket comes along and the form processing changes? You'll have to re-implement your panels. ~ Thank you, Paul Bors -Original Message- From: Lucio Crusca [mailto:lu...@sulweb.org] Sent: Wednesday, August 14, 2013 8:52 AM To: users@wicket.apache.org Subject: Updating form fields on dropdown selection change I have a DropDownChoice that should update some form fields when the user selects an item. My selection-changed-listener code is along the lines of: form.modelChanging(); T obj = model.getObject(); obj.setFoo(newSelection.getFoo()); obj.setBar(newSelection.getBar()); form.modelChanged(); form.clearInput(); form.visitChildren(); The problem is that without clearInput() the form fields do not update, while with clearInput they do update, but I loose any input also in fields other than FOO and BAR. I need a way to update only FOO and BAR fields and let other fields alone so that they keep their current user input. Thanks in advance for your help. - 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
RE: Updating form fields on dropdown selection change
Take a look at how one drop-down updates the other via Ajax in the Wicket Examples at: http://www.wicket-library.com/wicket-examples/ajax/choice Thanks for the suggestion, that code looks good. However I don't understand a number of things: 1. where wicket is made aware of the fact that the target is actually the models dropdown and not something else in the form? 2. the constructor 'new AjaxFormComponentUpdatingBehavior(onchange)' does not seem to exist in Wicket 6. Can I just use the no args constructor? 3. Can I use the AjaxRequestTarget to update a text field also, even if in the example it updates a dropdownchoice? - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
RE: Updating form fields on dropdown selection change
1. where wicket is made aware of the fact that the target is actually the models dropdown and not something else in the form? I'm not sure I understand this question but I think the answer you're looking for is: because it has a behavior attached to a component to which you can gain access to its model. I would suggest you take a look over chapter 16 Working with AJAX of the Wicket Free Guide (http://wicket.apache.org/learn/books/freeguide.html). 2. the constructor 'new AjaxFormComponentUpdatingBehavior(onchange)' does not seem to exist in Wicket 6. Can I just use the no args constructor? Wicket Library is using Wicket 1.5.10. Take a look over the Migration to 6.0 guide: https://cwiki.apache.org/confluence/display/WICKET/Migration+to+Wicket+6.0#MigrationtoWicket6.0-Ajax You might want to use org.apache.wicket.ajax.form.OnChangeAjaxBehavior or some other subclass of AjaxEventBehavior. 3. Can I use the AjaxRequestTarget to update a text field also, even if in the example it updates a dropdownchoice? You can update any component you would like using a AjaxRequestTarget. Just make sure you call setOutputMarkupId(true) on the components you're planning on updating so that it has an ID attribute for JQuery to find it. If you don't, Wicket will remind you via a runtime exception :) ~ Thank you, Paul Bors -Original Message- From: Lucio Crusca [mailto:lu...@sulweb.org] Sent: Wednesday, August 14, 2013 2:37 PM To: users@wicket.apache.org Subject: RE: Updating form fields on dropdown selection change Take a look at how one drop-down updates the other via Ajax in the Wicket Examples at: http://www.wicket-library.com/wicket-examples/ajax/choice Thanks for the suggestion, that code looks good. However I don't understand a number of things: 1. where wicket is made aware of the fact that the target is actually the models dropdown and not something else in the form? 2. the constructor 'new AjaxFormComponentUpdatingBehavior(onchange)' does not seem to exist in Wicket 6. Can I just use the no args constructor? 3. Can I use the AjaxRequestTarget to update a text field also, even if in the example it updates a dropdownchoice? - 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
RE: Updating form fields on dropdown selection change
I wrote: 2. the constructor 'new AjaxFormComponentUpdatingBehavior(onchange)' does not seem to exist in Wicket 6. Can I just use the no args constructor? Please ignore this one, I was using AjaxFormChoiceComponentUpdatingBehavior instead by mistake. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
RE: Updating form fields on dropdown selection change
1. where wicket is made aware of the fact that the target is actually the models dropdown and not something else in the form? I'm not sure I understand this question but I think the answer you're looking for is: because it has a behavior attached to a component to which you can gain access to its model. I would suggest you take a look over chapter 16 Working with AJAX of the Wicket Free Guide (http://wicket.apache.org/learn/books/freeguide.html). Sorry, it was so obvious that I didn't notice it, I'm not surprised you aren't sure to understand... the place where wicket is being made aware of what it should update is just inside the inner class in the only single method that's being called: target.add(models). - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
