시소당

Sharing an InputMap or an ActionMap Between Two Components

By  sharing  an  InputMap  or  ActionMap,  any  change  to  the  shared  InputMap  or  ActionMap  will  affect  all  components  sharing  the  InputMap  or  ActionMap.  WHEN_FOCUSED  and  WHEN_ANCESTOR_OF_FOCUSED_COMPONENT  types  of  InputMaps  can  be  shared.  WHEN_IN_FOCUSED_WINDOW  InputMaps  cannot  be  shared.

        //  Get  an  InputMap  from  the  desired  type  of  component  and  initialize  it
        InputMap  im  =  new  JTextArea().getInputMap(JComponent.WHEN_FOCUSED);
        im.put(KeyStroke.getKeyStroke("F2"),  "actionName");
        
        //  Get  an  ActionMap  from  the  desired  type  of  component  and  initialize  it
        ActionMap  am  =    new  JTextArea().getActionMap();
        am.put("actionName",
                new  AbstractAction("actionName")  {
                        public  void  actionPerformed(ActionEvent  evt)  {
                                process((JTextComponent)evt.getSource());
                        }
                }
        );
        
        //  Use  the  shared  InputMap  and  ActionMap
        component1.setInputMap(JComponent.WHEN_FOCUSED,  im);
        component2.setInputMap(JComponent.WHEN_FOCUSED,  im);
        
        component1.setActionMap(am);
        component2.setActionMap(am);
        
        //  Now,  any  change  to  the  shared  InputMap  or  ActionMap  will  affect  both  component1  and  component2
        im.put(KeyStroke.getKeyStroke("F3"),  "actionName2");
        am.put("actionName2",
                new  AbstractAction("actionName2")  {
                        public  void  actionPerformed(ActionEvent  evt)  {
                                process((JTextComponent)evt.getSource());
                        }
                }
        );