e861. sharing an inputmap or an actionmap between two components.txt

这里面包含了一百多个JAVA源文件

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());
            }
        }
    );