Hi,
have a look at models in the user guide there are some good approaches to
update them.
Visibility:
ResourceLink pl = new ResourceLink("pdfLink", new
ByteArrayResource("application/pdf")) {
// visibility method
}
kind regards
Tobias
> Am 10.05.2015 um 14:15 schrieb Chris <[email protected]>:
>
> Hi Tobias,
>
> I have followed your approach (update from parent) and it works. Thanks a lot.
> But could you show me also how to overwrite the visibility directly in the
> ResourceLink?
> ResourceLink pl = new ResourceLink("pdfLink", new
> ByteArrayResource("application/pdf") {…}?
>
> By the way, in the panel I have added another list view which does not use
> the model of the panel but has to calculate the model dynamically.
> With the following code, it seems also to be only called once in the
> constructor but not via ajaxUpdate. How to change this?
>
> ListModel<String> listModel = new ListModel<String>() {
> @Override
> public List<String> getObject() {
>
> Thanks, Chris
>
>
>> Am 09.05.2015 um 20:38 schrieb Tobias Soloschenko
>> <[email protected]>:
>>
>> In your snippet you put the isVisible in the ByteArrayResource. That's why
>> you get the error message - move it to your ResourceLink
>>
>> One easy way to update from parent would be: make a method in your panel
>> which returns your link then make your panel a field in the parent and call
>> the getter in the callback and add the link to your AjaxRequestTarget there.
>>
>> kind regards
>>
>> Tobias
>>
>>> Am 09.05.2015 um 20:19 schrieb Chris <[email protected]>:
>>>
>>> Hi,
>>>
>>> thanks, I am getting the message "method does not override method from its
>>> superclass."
>>>
>>> The problem is that I do not have the callback method in this panel but in
>>> its parent; I would need to have a getter method so that I can directly
>>> access the resource link from the panel instance and change its visibility.
>>>
>>> ResourceLink pl = new ResourceLink("pdfLink", new
>>> ByteArrayResource("application/pdf") {
>>>
>>> @Override
>>> protected boolean isVisible() {
>>> return ....;
>>> }
>>>
>>> });
>>>
>>> Chris
>>>
>>>
>>>> Am 09.05.2015 um 20:12 schrieb Tobias Soloschenko
>>>> <[email protected]>:
>>>>
>>>> Yes - should work because isVisible is inherited from component:
>>>>
>>>> http://ci.apache.org/projects/wicket/apidocs/6.0.x/org/apache/wicket/markup/html/link/ResourceLink.html
>>>>
>>>> But watch out not to put in expensive calls in it! The user guide is also
>>>> mentioning a lot about that topic:
>>>>
>>>> https://wicket.apache.org/guide/guide/bestpractices.html#bestpractices_5
>>>>
>>>> At this place it is good to mention the new location of the guide:
>>>>
>>>> http://ci.apache.org/projects/wicket/guide/6.x/
>>>>
>>>> http://ci.apache.org/projects/wicket/guide/7.x/
>>>>
>>>> kind regards
>>>>
>>>> Tobias
>>>>
>>>>> Am 09.05.2015 um 19:58 schrieb Chris <[email protected]>:
>>>>>
>>>>> Hi Tobias,
>>>>>
>>>>> thanks! Can the isVisible method be directly overridden also by a
>>>>> ResourceLink?
>>>>>
>>>>> ResourceLink pl = new ResourceLink(..) {
>>>>> protected boolean isVisible() {…}
>>>>> }
>>>>> Chris
>>>>>
>>>>>
>>>>>> Am 09.05.2015 um 19:46 schrieb Tobias Soloschenko
>>>>>> <[email protected]>:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> the constructor of your panel is only called at a normal request - you
>>>>>> have to set the visibility of your link in the ajax callback via
>>>>>> AjaxRequestTarget.
>>>>>>
>>>>>> 1. setOutputMarkupId and setOutputMarkupPlaceholder of the link to true
>>>>>> (in your constructor)
>>>>>>
>>>>>> 2. set the visibility to your component in the callback method (based on
>>>>>> your Model)
>>>>>>
>>>>>> 3. add the component to the AjaxRequestTarget so that it is updated
>>>>>>
>>>>>> Another solution would be to override the isVisible method and return
>>>>>> the visibility based on your model and then only add the component to
>>>>>> the AjaxRequestTarget.
>>>>>>
>>>>>> kind regards
>>>>>>
>>>>>> Tobias
>>>>>>
>>>>>>> Am 09.05.2015 um 19:29 schrieb Chris <[email protected]>:
>>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> currently, the visibility of the resource link is not updated when the
>>>>>>> parent component of the panel is rendered again based on an ajax call.
>>>>>>>
>>>>>>> How can the visibility set dynamically based on the model’s data?
>>>>>>>
>>>>>>> Thanks, Chris
>>>>>>>
>>>>>>> public SomePanel(String id, final IModel<List<A>> model) {
>>>>>>> super(id, model);
>>>>>>>
>>>>>>> ResourceLink pl = new ResourceLink("pdfLink", new
>>>>>>> ByteArrayResource("application/pdf") {...}
>>>>>>> pl.setVisible(routingModel.getObject().get(0).getElements().size() > 0);
>>>>>>> ...
>>>>>>> }
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