T - the context typepublic abstract class ContextSensitiveAction<T extends ContextSensitiveHandler> extends AbstractAction
Component provides/implements this context. The action will be
enabled if a component inside the provider receives the focus or only one
provider of this type is available in the current UI.
First you need a handler:
public interface SaveHandler extends ContextSensitiveHandler
{
public void save();
}
The action may look like this:
public class SaveAction extends ContextSensitiveAction<SaveHandler>
{
public SaveAction(XdevUI ui)
{
super(ui,SaveHandler.class);
setCaption("Save");
}
@Override
public void actionPerformed(ActionEvent e)
{
getHandler().save();
}
}
Then any Component can provide the handler:
public class EditorView extends XdevView implements SaveHandler
{
public EditorView()
{
super();
this.initUI();
}
@Override
public void save()
{
// Implement save routine here
}
private void initUI()
{
// ...
}
}
For example in the main UI there is a button bar or menu where the action is
visible:
public class MainUI extends XdevUI
{
@Override
public void init(VaadinRequest request)
{
this.initUI();
...
SaveAction saveAction = new SaveAction(this);
XdevButton cmdSave = new XdevButton(action);
...
// or otherwise
cmdSave.setAction(saveAction);
}
}
getHandler(),
handlerChanged(ContextSensitiveHandler, ContextSensitiveHandler),
ContextSensitiveHandler,
XdevActionManagerCAPTION_PROPERTY, DESCRIPTION_PROPERTY, ENABLED_PROPERTY, ICON_PROPERTY, SHORTCUT_PROPERTYaddPropertyChangeListener, getCaption, getDescription, getIcon, getShortcut, getUI, isEnabled, removePropertyChangeListener, setCaption, setDescription, setEnabled, setIcon, setShortcutequals, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitactionPerformed