java.lang.Object
javax.swing.AbstractAction
javax.swing.text.TextAction
- All Implemented Interfaces:
ActionListener
,Serializable
,Cloneable
,EventListener
,Action
- Direct Known Subclasses:
DefaultEditorKit.BeepAction
,DefaultEditorKit.CopyAction
,DefaultEditorKit.CutAction
,DefaultEditorKit.DefaultKeyTypedAction
,DefaultEditorKit.InsertBreakAction
,DefaultEditorKit.InsertContentAction
,DefaultEditorKit.InsertTabAction
,DefaultEditorKit.PasteAction
,StyledEditorKit.StyledTextAction
public abstract class TextAction extends AbstractAction
An Action implementation useful for key bindings that are
shared across a number of different text components. Because
the action is shared, it must have a way of getting it's
target to act upon. This class provides support to try and
find a text component to operate on. The preferred way of
getting the component to act upon is through the ActionEvent
that is received. If the Object returned by getSource can
be narrowed to a text component, it will be used. If the
action event is null or can't be narrowed, the last focused
text component is tried. This is determined by being
used in conjunction with a JTextController which
arranges to share that information with a TextAction.
Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing. As of 1.4, support for long term storage
of all JavaBeans
has been added to the java.beans
package.
Please see XMLEncoder
.
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Field Summary
Fields declared in class javax.swing.AbstractAction
changeSupport, enabled
Fields declared in interface javax.swing.Action
ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, DISPLAYED_MNEMONIC_INDEX_KEY, LARGE_ICON_KEY, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SELECTED_KEY, SHORT_DESCRIPTION, SMALL_ICON
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Constructor Summary
Constructors Constructor Description TextAction(String name)
Creates a new JTextAction object. -
Method Summary
Modifier and Type Method Description static Action[]
augmentList(Action[] list1, Action[] list2)
Takes one list of commands and augments it with another list of commands.protected JTextComponent
getFocusedComponent()
Fetches the text component that currently has focus.protected JTextComponent
getTextComponent(ActionEvent e)
Determines the component to use for the action.Methods declared in class javax.swing.AbstractAction
addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, isEnabled, putValue, removePropertyChangeListener, setEnabled
Methods declared in class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods declared in interface java.awt.event.ActionListener
actionPerformed
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Constructor Details
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TextAction
Creates a new JTextAction object.- Parameters:
name
- the name of the action
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Method Details
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getTextComponent
Determines the component to use for the action. This if fetched from the source of the ActionEvent if it's not null and can be narrowed. Otherwise, the last focused component is used.- Parameters:
e
- the ActionEvent- Returns:
- the component
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augmentList
Takes one list of commands and augments it with another list of commands. The second list takes precedence over the first list; that is, when both lists contain a command with the same name, the command from the second list is used.- Parameters:
list1
- the first list, may be empty but notnull
list2
- the second list, may be empty but notnull
- Returns:
- the augmented list
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getFocusedComponent
Fetches the text component that currently has focus. This allows actions to be shared across text components which is useful for key-bindings where a large set of actions are defined, but generally used the same way across many different components.- Returns:
- the component
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