CODEWITHSUNDEEP
javahtmlajaxbuttonwicket
SSV
SSV

Reputation: 860

How to change visibility of model in method via setVisible() method wicket ajax

So I do have my

public class MyClass extends WebPage {

static   AjaxFallbackLink ddd = null;
  static AjaxFallbackLink dddd = null;

(...) }

and in constructor I do have :

ddd = new AjaxFallbackLink("previous") {

        @Override
        public void onClick(AjaxRequestTarget target) {
           // 
        }
    };
   ddd.setOutputMarkupId(true);
   ddd.setOutputMarkupPlaceholderTag(true);
   ddd.setVisible(false);
        add(ddd);

now I want to create a method which will change the visibility of this item. However, calling ddd.setVisible(true); in this method does not work.

any sollutions?

Upvotes: 0

Views: 3649

Answers (2)

OnesAndZeros
OnesAndZeros

Reputation: 383

Robert's answer is generally considered more correct, however I will provide an alternative.

You are close on your implementation, but to do the update you have to call target.add(myLink); to get the ajax refresh of myLink (In earlier versions of Wicket it is target.addComponent()).

To change the visiblity with a method, you will have to pass an AjaxRequestTarget. Within the onClick methods for an AjaxButton or AjaxLink you can call the following method:

private void updateVisibility(AjaxRequestTarget target, AjaxLink myLink, Boolean isVisible) {
    myLink.setVisible(isVisible);
    target.add(myLink);
}

Hope that helps!

Upvotes: 1

Robert Niestroj
Robert Niestroj

Reputation: 16131

Create your link like this adn set the condition where in should be visible in the onConfigure() method:

  AjaxLink myLink = new AjaxLink("myLink") {
     @Override
     public void onClick(AjaxRequestTarget target) {
        //click stuff done here
     }

     @Override
     protected void onConfigure() {
        super.onConfigure(); 
        setVisible(hereTheVisibleCondition);
     }
  };

This way whenever the link get's rendered it will be made visible or not depending by the condition.

Upvotes: 4

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