Oracle ADF - Using Region Navigation Listener in af:region

Greetings,

Its been long that i have posted something related to ADF. Thanks to my visitors who ask questions to keep me alive.

One reader shared a use case with me as follows

"We have a requirement to collapse a panel in Panel splitter for specific activity in a region"

The answer for that is use Region Listener in af:region component.

The Region Listener have a RegionNavigationEvent argument which can provide the current view in a af:region based on that you can conditionally collapse or expand panel

Example: Download complete example

In my bounded task flow i got 3 views, view 1-3 respectively as shown in the slide.

I have home page with Panel splitter and af:region in facet 2

My use case is to collapse left panel when user navigates to view 2 in a region.

I have a Region Listener as follows

I have panel splitter binding in the bean 

The Region Navigation Listener code is as follows

public class RegionNavigationListener {

    private RichPanelSplitter myPanel;

    public RegionNavigationListener() {

    }

    public void onRegionNavigated(RegionNavigationEvent region) {

        String viewId = region.getNewViewId();        

        

        if (viewId.equalsIgnoreCase("/region-flow-definition/view2")) {

            doCollapsePanel(myPanel);

        }

        else {

            doExpandPanel(myPanel);

        }

    }

    

    private void doCollapsePanel(RichPanelSplitter panel){    

        panel.setCollapsed(true);

        AdfFacesContext.getCurrentInstance().addPartialTarget(panel);  

    }

    

    private void doExpandPanel(RichPanelSplitter panel){    

        panel.setCollapsed(false);

        AdfFacesContext.getCurrentInstance().addPartialTarget(panel);  

    }

    

    public void setMyPanel(RichPanelSplitter myPanel) {

        this.myPanel = myPanel;

    }

    public RichPanelSplitter getMyPanel() {

        return myPanel;

    }

}

Hope you like it 

Follow me on twitter and happy Jdeveloping,

Zeeshan Baig