Close and Open a View

From JWic

Check View State

Views and editors are managed by the site using PartHandle objects. To find out if a view is loaded, simply call Site.getViewHandle(VIEW_ID). If this method returns null, the view is not loaded.

PartHandle handle = site.getViewHandle(MyView.ID_VIEW);
if (handle != null) {
  MyView myView = (MyView)handle.getPart();
}

Note: A View that is loaded might not be visible in the current perspective! To find out if a view is visible in the active perspective, use the following code:

PartHandle handle = site.getViewHandle(MyView.ID_VIEW);
if (handle != null) {
  if (site.getActivePerspective().isVisible(handle)) {
    // the view is visible
    ...
  }
}

Close a View

There are several ways how to close a view. The easiest way is to call the .close() method on the view.

// prefered way:
PartHandle handle = site.getViewHandle(MyView.ID_VIEW);
if (handle != null) {
  MyView myView = (MyView)handle.getPart();
  myView.close();
}
// other way:
handle.getArea().closePart(handle);

Open a View

Always use the Site.openView(..) method to open or activate a view. This method checks if the view is already loaded. If it is already loaded, it is activated. Otherwise the view is initialized and moved to the correct position.

site.openView(Area.POS_RIGHT, MyView.ID_VIEW);

Note: A view can be loaded only once per session. If it is requested to open a view in a different location then the currently loaded one is, the view is closed and opened again in the new location.