org.jhotdraw.draw.action

Class AbstractSelectedAction

java.lang.Object

javax.swing.AbstractAction

org.jhotdraw.draw.action.AbstractSelectedAction

All Implemented Interfaces:

java.awt.event.ActionListener, java.io.Serializable, java.lang.Cloneable, java.util.EventListener, javax.swing.Action, Disposable

Direct Known Subclasses:

AlignAction, ApplyAttributesAction, AttributeAction, BringToFrontAction, CombineAction, DefaultAttributeAction, FontChooserHandler, GroupAction, IncreaseHandleDetailLevelAction, MoveAction, MoveConstrainedAction, PickAttributesAction, SelectionColorChooserHandler, SelectSameAction, SendToBackAction

public abstract class AbstractSelectedAction
extends javax.swing.AbstractAction
implements Disposable

This abstract class can be extended to implement an Action that acts on behalf of the selected figures of a DrawingView.

By default the enabled state of this action reflects the enabled state of the active DrawingView. If no drawing view is active, this action is disabled. When many actions listen to the enabled state of the active drawing views this can considerably slow down the editor. If updating the enabled state is not necessary, you can prevent the action from doing so using setUpdateEnabledState(boolean).

AbstractDrawingEditorAction listens using a WeakPropertyChangeListener on the DrawingEditor and thus may become garbage collected if it is not referenced by any other object.

See Also:

Serialized Form

Field Summary

Fields inherited from 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

Constructor Summary

Constructors

Constructor and Description
AbstractSelectedAction(DrawingEditor editor) Creates an action which acts on the selected figures on the current view of the specified editor.

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes of all resources held by this object so that they can be garbage collected.
DrawingEditor	getEditor()
boolean	isUpdatEnabledState() Returns true, if this action automatically updates its enabled state to reflect the enabled state of the active DrawingView.
void	setEditor(DrawingEditor editor)
void	setUpdateEnabledState(boolean newValue) By default, the enabled state of this action is updated to reflect the enabled state of the active DrawingView.

Methods inherited from class javax.swing.AbstractAction

addPropertyChangeListener, getKeys, getPropertyChangeListeners, getValue, isEnabled, putValue, removePropertyChangeListener, setEnabled

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.awt.event.ActionListener

actionPerformed

Constructor Detail

AbstractSelectedAction

public AbstractSelectedAction(DrawingEditor editor)

Creates an action which acts on the selected figures on the current view of the specified editor.

Method Detail

dispose

public void dispose()

Description copied from interface: Disposable

Disposes of all resources held by this object so that they can be garbage collected.

Specified by:

dispose in interface Disposable

setEditor

public void setEditor(@Nullable
                      DrawingEditor editor)

getEditor

@Nullable
public DrawingEditor getEditor()

setUpdateEnabledState

public void setUpdateEnabledState(boolean newValue)

By default, the enabled state of this action is updated to reflect the enabled state of the active DrawingView. Since this is not always necessary, and since many listening actions may considerably slow down the drawing editor, you can switch this behavior off here.

Parameters:

newValue - Specify false to prevent automatic updating of the enabled state.

isUpdatEnabledState

public boolean isUpdatEnabledState()

Returns true, if this action automatically updates its enabled state to reflect the enabled state of the active DrawingView.