AbstractButton

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javax.swing
Class AbstractButton

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.AbstractButton

All Implemented Interfaces:: ImageObserver, ItemSelectable, MenuContainer, Serializable, SwingConstants

Direct Known Subclasses:: JButton, JMenuItem, JToggleButton

public abstract class AbstractButton
extends JComponent
implements ItemSelectable, SwingConstants

Defines common behaviors for buttons and menu items. For further information see How to Use Buttons, Check Boxes, and Radio Buttons, a section in The Java Tutorial.

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^TM has been added to the java.beans package. Please see XMLEncoder.

Author:: Jeff Dinkins
See Also:: Serialized Form

Nested Class Summary
`protected class`	`AbstractButton.AccessibleAbstractButton` This class implements accessibility support for the `AbstractButton` class.
`private static class`	`AbstractButton.ButtonActionPropertyChangeListener`
`protected class`	`AbstractButton.ButtonChangeListener` Extends `ChangeListener` to be serializable.
`private class`	`AbstractButton.ForwardActionEvents`
`private class`	`AbstractButton.ForwardItemEvents`

Nested classes inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent, JComponent.ActionStandin, JComponent.IntVector, JComponent.KeyboardState

Nested classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary
`private javax.accessibility.AccessibleIcon`	`accessibleIcon`
`private Action`	`action`
`protected ActionListener`	`actionListener` The button model's `ActionListener`.
`private java.beans.PropertyChangeListener`	`actionPropertyChangeListener`
`static String`	`BORDER_PAINTED_CHANGED_PROPERTY` Identifies a change to having the border drawn, or having it not drawn.
`protected ChangeEvent`	`changeEvent` Only one `ChangeEvent` is needed per button instance since the event's only state is the source property.
`protected ChangeListener`	`changeListener` The button model's `changeListener`.
`static String`	`CONTENT_AREA_FILLED_CHANGED_PROPERTY` Identifies a change to having the button paint the content area.
`private boolean`	`contentAreaFilled`
`private Icon`	`defaultIcon`
`private Insets`	`defaultMargin`
`static String`	`DISABLED_ICON_CHANGED_PROPERTY` Identifies a change to the icon used when the button has been disabled.
`static String`	`DISABLED_SELECTED_ICON_CHANGED_PROPERTY` Identifies a change to the icon used when the button has been disabled and selected.
`private Icon`	`disabledIcon`
`private Icon`	`disabledSelectedIcon`
`static String`	`FOCUS_PAINTED_CHANGED_PROPERTY` Identifies a change to having the border highlighted when focused, or not.
`static String`	`HORIZONTAL_ALIGNMENT_CHANGED_PROPERTY` Identifies a change in the button's horizontal alignment.
`static String`	`HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY` Identifies a change in the button's horizontal text position.
`private int`	`horizontalAlignment`
`private int`	`horizontalTextPosition`
`static String`	`ICON_CHANGED_PROPERTY` Identifies a change to the icon that represents the button.
`private int`	`iconTextGap`
`protected ItemListener`	`itemListener` The button model's `ItemListener`.
`private Insets`	`margin`
`static String`	`MARGIN_CHANGED_PROPERTY` Identifies a change in the button's margins.
`private int`	`mnemonic`
`static String`	`MNEMONIC_CHANGED_PROPERTY` Identifies a change to the button's mnemonic.
`private int`	`mnemonicIndex`
`protected ButtonModel`	`model` The data model that determines the button's state.
`static String`	`MODEL_CHANGED_PROPERTY` Identifies a change in the button model.
`private long`	`multiClickThreshhold`
`private boolean`	`paintBorder`
`private boolean`	`paintFocus`
`static String`	`PRESSED_ICON_CHANGED_PROPERTY` Identifies a change to the icon used when the button has been pressed.
`private Icon`	`pressedIcon`
`static String`	`ROLLOVER_ENABLED_CHANGED_PROPERTY` Identifies a change from rollover enabled to disabled or back to enabled.
`static String`	`ROLLOVER_ICON_CHANGED_PROPERTY` Identifies a change to the icon used when the cursor is over the button.
`static String`	`ROLLOVER_SELECTED_ICON_CHANGED_PROPERTY` Identifies a change to the icon used when the cursor is over the button and it has been selected.
`private boolean`	`rolloverEnabled`
`private Icon`	`rolloverIcon`
`private Icon`	`rolloverSelectedIcon`
`static String`	`SELECTED_ICON_CHANGED_PROPERTY` Identifies a change to the icon used when the button has been selected.
`private Icon`	`selectedIcon`
`private String`	`text`
`static String`	`TEXT_CHANGED_PROPERTY` Identifies a change in the button's text.
`static String`	`VERTICAL_ALIGNMENT_CHANGED_PROPERTY` Identifies a change in the button's vertical alignment.
`static String`	`VERTICAL_TEXT_POSITION_CHANGED_PROPERTY` Identifies a change in the button's vertical text position.
`private int`	`verticalAlignment`
`private int`	`verticalTextPosition`

Fields inherited from class javax.swing.JComponent

_bounds, accessibleContext, listenerList, paintingChild, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Container

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface javax.swing.SwingConstants

BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary
`AbstractButton()`

Method Summary
`void`	`addActionListener(ActionListener l)` Adds an `ActionListener` to the button.
`void`	`addChangeListener(ChangeListener l)` Adds a `ChangeListener` to the button.
`void`	`addItemListener(ItemListener l)` Adds an `ItemListener` to the `checkbox`.
`protected int`	`checkHorizontalKey(int key, String exception)` Verify that key is a legal value for the `horizontalAlignment` properties.
`protected int`	`checkVerticalKey(int key, String exception)` Ensures that the key is a valid.
`protected void`	`configurePropertiesFromAction(Action a)` Factory method which sets the `ActionEvent` source's properties according to values from the `Action` instance.
`(package private) void`	`configurePropertiesFromAction(Action a, String[] types)` Configures the AbstractButton's properties according to values from the `Action` instance.
`protected ActionListener`	`createActionListener()`
`protected java.beans.PropertyChangeListener`	`createActionPropertyChangeListener(Action a)` Factory method which creates the `PropertyChangeListener` used to update the `ActionEvent` source as properties change on its `Action` instance.
`protected ChangeListener`	`createChangeListener()` Subclasses that want to handle `ChangeEvents` differently can override this to return another `ChangeListener` implementation.
`protected ItemListener`	`createItemListener()`
`void`	`doClick()` Programmatically perform a "click".
`void`	`doClick(int pressTime)` Programmatically perform a "click".
`protected void`	`fireActionPerformed(ActionEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireItemStateChanged(ItemEvent event)` Notifies all listeners that have registered interest for notification on this event type.
`protected void`	`fireStateChanged()` Notifies all listeners that have registered interest for notification on this event type.
`Action`	`getAction()` Returns the currently set `Action` for this `ActionEvent` source, or `null` if no `Action` is set.
`String`	`getActionCommand()` Returns the action command for this button.
`ActionListener[]`	`getActionListeners()` Returns an array of all the `ActionListener`s added to this AbstractButton with addActionListener().
`ChangeListener[]`	`getChangeListeners()` Returns an array of all the `ChangeListener`s added to this AbstractButton with addChangeListener().
`Icon`	`getDisabledIcon()` Returns the icon used by the button when it's disabled.
`Icon`	`getDisabledSelectedIcon()` Returns the icon used by the button when it's disabled and selected.
`int`	`getDisplayedMnemonicIndex()` Returns the character, as an index, that the look and feel should provide decoration for as representing the mnemonic character.
`int`	`getHorizontalAlignment()` Returns the horizontal alignment of the icon and text.
`int`	`getHorizontalTextPosition()` Returns the horizontal position of the text relative to the icon.
`Icon`	`getIcon()` Returns the default icon.
`int`	`getIconTextGap()` Returns the amount of space between the text and the icon displayed in this button.
`ItemListener[]`	`getItemListeners()` Returns an array of all the `ItemListener`s added to this AbstractButton with addItemListener().
`String`	`getLabel()` Deprecated. - Replaced by `getText`
`Insets`	`getMargin()` Returns the margin between the button's border and the label.
`int`	`getMnemonic()` Returns the keyboard mnemonic from the the current model.
`ButtonModel`	`getModel()` Returns the model that this button represents.
`long`	`getMultiClickThreshhold()` Gets the amount of time (in milliseconds) required between mouse press events for the button to generate the corresponding action events.
`Icon`	`getPressedIcon()` Returns the pressed icon for the button.
`Icon`	`getRolloverIcon()` Returns the rollover icon for the button.
`Icon`	`getRolloverSelectedIcon()` Returns the rollover selection icon for the button.
`Icon`	`getSelectedIcon()` Returns the selected icon for the button.
`Object[]`	`getSelectedObjects()` Returns an array (length 1) containing the label or `null` if the button is not selected.
`String`	`getText()` Returns the button's text.
`ButtonUI`	`getUI()` Returns the L&F object that renders this component.
`int`	`getVerticalAlignment()` Returns the vertical alignment of the text and icon.
`int`	`getVerticalTextPosition()` Returns the vertical position of the text relative to the icon.
`boolean`	`imageUpdate(Image img, int infoflags, int x, int y, int w, int h)` This is overridden to return false if the current `Icon`'s `Image` is not equal to the passed in `Image` `img`.
`protected void`	`init(String text, Icon icon)`
`boolean`	`isBorderPainted()` Gets the `borderPainted` property.
`boolean`	`isContentAreaFilled()` Gets the `contentAreaFilled` property.
`boolean`	`isFocusPainted()` Gets the `paintFocus` property.
`private boolean`	`isListener(Class c, ActionListener a)`
`boolean`	`isRolloverEnabled()` Gets the `rolloverEnabled` property.
`boolean`	`isSelected()` Returns the state of the button.
`protected void`	`paintBorder(Graphics g)` Paint the button's border if `BorderPainted` property is true and the button has a border.
`protected String`	`paramString()` Returns a string representation of this `AbstractButton`.
`void`	`removeActionListener(ActionListener l)` Removes an `ActionListener` from the button.
`void`	`removeChangeListener(ChangeListener l)` Removes a ChangeListener from the button.
`void`	`removeItemListener(ItemListener l)` Removes an `ItemListener` from the button.
`void`	`setAction(Action a)` Sets the `Action` for the `ActionEvent` source.
`void`	`setActionCommand(String actionCommand)` Sets the action command for this button.
`void`	`setBorderPainted(boolean b)` Sets the `borderPainted` property.
`void`	`setContentAreaFilled(boolean b)` Sets the `contentAreaFilled` property.
`void`	`setDisabledIcon(Icon disabledIcon)` Sets the disabled icon for the button.
`void`	`setDisabledSelectedIcon(Icon disabledSelectedIcon)` Sets the disabled selection icon for the button.
`void`	`setDisplayedMnemonicIndex(int index)` Provides a hint to the look and feel as to which character in the text should be decorated to represent the mnemonic.
`void`	`setEnabled(boolean b)` Enables (or disables) the button.
`void`	`setFocusPainted(boolean b)` Sets the `paintFocus` property, which must be `true` for the focus state to be painted.
`void`	`setHorizontalAlignment(int alignment)` Sets the horizontal alignment of the icon and text.
`void`	`setHorizontalTextPosition(int textPosition)` Sets the horizontal position of the text relative to the icon.
`void`	`setIcon(Icon defaultIcon)` Sets the button's default icon.
`void`	`setIconTextGap(int iconTextGap)` If both the icon and text properties are set, this property defines the space between them.
`void`	`setLabel(String label)` Deprecated. - Replaced by `setText(text)`
`void`	`setMargin(Insets m)` Sets space for margin between the button's border and the label.
`void`	`setMnemonic(char mnemonic)` This method is now obsolete, please use `setMnemonic(int)` to set the mnemonic for a button.
`void`	`setMnemonic(int mnemonic)` Sets the keyboard mnemonic on the current model.
`void`	`setModel(ButtonModel newModel)` Sets the model that this button represents.
`void`	`setMultiClickThreshhold(long threshhold)` Sets the amount of time (in milliseconds) required between mouse press events for the button to generate the corresponding action events.
`void`	`setPressedIcon(Icon pressedIcon)` Sets the pressed icon for the button.
`void`	`setRolloverEnabled(boolean b)` Sets the `rolloverEnabled` property, which must be `true` for rollover effects to occur.
`void`	`setRolloverIcon(Icon rolloverIcon)` Sets the rollover icon for the button.
`void`	`setRolloverSelectedIcon(Icon rolloverSelectedIcon)` Sets the rollover selected icon for the button.
`void`	`setSelected(boolean b)` Sets the state of the button.
`void`	`setSelectedIcon(Icon selectedIcon)` Sets the selected icon for the button.
`void`	`setText(String text)` Sets the button's text.
`void`	`setUI(ButtonUI ui)` Sets the L&F object that renders this component.
`void`	`setVerticalAlignment(int alignment)` Sets the vertical alignment of the icon and text.
`void`	`setVerticalTextPosition(int textPosition)` Sets the vertical position of the text relative to the icon.
`private void`	`updateDisplayedMnemonicIndex(String text, int mnemonic)` Update the displayedMnemonicIndex property.
`private void`	`updateMnemonicProperties()` Brings the mnemonic property in accordance with model's mnemonic.
`void`	`updateUI()` Resets the UI property to a value from the current look and feel.

Methods inherited from class javax.swing.JComponent

_paintImmediately, addAncestorListener, addNotify, addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, alwaysOnTop, checkIfChildObscuredBySibling, componentInputMapChanged, computeVisibleRect, computeVisibleRect, compWriteObjectNotify, contains, createToolTip, disable, enable, enableSerialization, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getAccessibleContext, getActionForKeyStroke, getActionMap, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBorder, getBounds, getClientProperty, getComponentGraphics, getConditionForKeyStroke, getCreatedDoubleBuffer, getDebugGraphicsOptions, getDefaultLocale, getGraphics, getHeight, getInputMap, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getManagingFocusBackwardTraversalKeys, getManagingFocusForwardTraversalKeys, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getUIClassID, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getWriteObjCounter, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isOptimizedDrawingEnabled, isPaintingOrigin, isPaintingTile, isPreferredSizeSet, isRequestFocusEnabled, isValidateRoot, paint, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyBindings, processKeyBindingsForAllComponents, processKeyEvent, processMouseMotionEvent, putClientProperty, rectangleIsObscured, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setCreatedDoubleBuffer, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setFont, setForeground, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPaintingChild, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, setWriteObjCounter, shouldDebugGraphics, superProcessMouseMotionEvent, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setFocusCycleRoot, setFocusTraversalKeys, setFocusTraversalPolicy, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

MODEL_CHANGED_PROPERTY

public static final String MODEL_CHANGED_PROPERTY

Identifies a change in the button model.

See Also:: Constant Field Values

TEXT_CHANGED_PROPERTY

public static final String TEXT_CHANGED_PROPERTY

Identifies a change in the button's text.

See Also:: Constant Field Values

MNEMONIC_CHANGED_PROPERTY

public static final String MNEMONIC_CHANGED_PROPERTY

Identifies a change to the button's mnemonic.

See Also:: Constant Field Values

MARGIN_CHANGED_PROPERTY

public static final String MARGIN_CHANGED_PROPERTY

Identifies a change in the button's margins.

See Also:: Constant Field Values

VERTICAL_ALIGNMENT_CHANGED_PROPERTY

public static final String VERTICAL_ALIGNMENT_CHANGED_PROPERTY

Identifies a change in the button's vertical alignment.

See Also:: Constant Field Values

HORIZONTAL_ALIGNMENT_CHANGED_PROPERTY

public static final String HORIZONTAL_ALIGNMENT_CHANGED_PROPERTY

Identifies a change in the button's horizontal alignment.

See Also:: Constant Field Values

VERTICAL_TEXT_POSITION_CHANGED_PROPERTY

public static final String VERTICAL_TEXT_POSITION_CHANGED_PROPERTY

Identifies a change in the button's vertical text position.

See Also:: Constant Field Values

HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY

public static final String HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY

Identifies a change in the button's horizontal text position.

See Also:: Constant Field Values

BORDER_PAINTED_CHANGED_PROPERTY

public static final String BORDER_PAINTED_CHANGED_PROPERTY

Identifies a change to having the border drawn, or having it not drawn.

See Also:: Constant Field Values

FOCUS_PAINTED_CHANGED_PROPERTY

public static final String FOCUS_PAINTED_CHANGED_PROPERTY

Identifies a change to having the border highlighted when focused, or not.

See Also:: Constant Field Values

ROLLOVER_ENABLED_CHANGED_PROPERTY

public static final String ROLLOVER_ENABLED_CHANGED_PROPERTY

Identifies a change from rollover enabled to disabled or back to enabled.

See Also:: Constant Field Values

CONTENT_AREA_FILLED_CHANGED_PROPERTY

public static final String CONTENT_AREA_FILLED_CHANGED_PROPERTY

Identifies a change to having the button paint the content area.

See Also:: Constant Field Values

ICON_CHANGED_PROPERTY

public static final String ICON_CHANGED_PROPERTY

Identifies a change to the icon that represents the button.

See Also:: Constant Field Values

PRESSED_ICON_CHANGED_PROPERTY

public static final String PRESSED_ICON_CHANGED_PROPERTY

Identifies a change to the icon used when the button has been pressed.

See Also:: Constant Field Values

SELECTED_ICON_CHANGED_PROPERTY

public static final String SELECTED_ICON_CHANGED_PROPERTY

Identifies a change to the icon used when the button has been selected.

See Also:: Constant Field Values

ROLLOVER_ICON_CHANGED_PROPERTY

public static final String ROLLOVER_ICON_CHANGED_PROPERTY

Identifies a change to the icon used when the cursor is over the button.

See Also:: Constant Field Values

ROLLOVER_SELECTED_ICON_CHANGED_PROPERTY

public static final String ROLLOVER_SELECTED_ICON_CHANGED_PROPERTY

Identifies a change to the icon used when the cursor is over the button and it has been selected.

See Also:: Constant Field Values

DISABLED_ICON_CHANGED_PROPERTY

public static final String DISABLED_ICON_CHANGED_PROPERTY

Identifies a change to the icon used when the button has been disabled.

See Also:: Constant Field Values

DISABLED_SELECTED_ICON_CHANGED_PROPERTY

public static final String DISABLED_SELECTED_ICON_CHANGED_PROPERTY

Identifies a change to the icon used when the button has been disabled and selected.

See Also:: Constant Field Values

model

protected ButtonModel model

The data model that determines the button's state.

text

private String text

margin

private Insets margin

defaultMargin

private Insets defaultMargin

defaultIcon

private Icon defaultIcon

pressedIcon

private Icon pressedIcon

disabledIcon

private Icon disabledIcon

selectedIcon

private Icon selectedIcon

disabledSelectedIcon

private Icon disabledSelectedIcon

rolloverIcon

private Icon rolloverIcon

rolloverSelectedIcon

private Icon rolloverSelectedIcon

paintBorder

private boolean paintBorder

paintFocus

private boolean paintFocus

rolloverEnabled

private boolean rolloverEnabled

contentAreaFilled

private boolean contentAreaFilled

verticalAlignment

private int verticalAlignment

horizontalAlignment

private int horizontalAlignment

verticalTextPosition

private int verticalTextPosition

horizontalTextPosition

private int horizontalTextPosition

iconTextGap

private int iconTextGap

mnemonic

private int mnemonic

mnemonicIndex

private int mnemonicIndex

multiClickThreshhold

private long multiClickThreshhold

accessibleIcon

private javax.accessibility.AccessibleIcon accessibleIcon

changeListener

protected ChangeListener changeListener

The button model's changeListener.

actionListener

protected ActionListener actionListener

The button model's ActionListener.

itemListener

protected ItemListener itemListener

The button model's ItemListener.

changeEvent

protected transient ChangeEvent changeEvent

Only one ChangeEvent is needed per button instance since the event's only state is the source property. The source of events generated is always "this".

action

private Action action

actionPropertyChangeListener

private java.beans.PropertyChangeListener actionPropertyChangeListener

Constructor Detail

AbstractButton

public AbstractButton()

Method Detail

getText

public String getText()

Returns the button's text.

Returns:: the buttons text
See Also:: setText(java.lang.String)

setText

public void setText(String text)

Sets the button's text.

Parameters:: text - the string used to set the text
See Also:: getText()

isSelected

public boolean isSelected()

Returns the state of the button. True if the toggle button is selected, false if it's not.

Returns:: true if the toggle button is selected, otherwise false

setSelected

public void setSelected(boolean b)

Sets the state of the button. Note that this method does not trigger an actionEvent. Call doClick to perform a programatic action change.

Parameters:: b - true if the button is selected, otherwise false

doClick

public void doClick()

Programmatically perform a "click". This does the same thing as if the user had pressed and released the button.

doClick

public void doClick(int pressTime)

Programmatically perform a "click". This does the same thing as if the user had pressed and released the button. The button stays visually "pressed" for pressTime milliseconds.

Parameters:: pressTime - the time to "hold down" the button, in milliseconds

setMargin

public void setMargin(Insets m)

Sets space for margin between the button's border and the label. Setting to null will cause the button to use the default margin. The button's default Border object will use this value to create the proper margin. However, if a non-default border is set on the button, it is that Border object's responsibility to create the appropriate margin space (else this property will effectively be ignored).

Parameters:: m - the space between the border and the label

getMargin

public Insets getMargin()

Returns the margin between the button's border and the label.

Returns:: an Insets object specifying the margin between the botton's border and the label
See Also:: setMargin(java.awt.Insets)

getIcon

public Icon getIcon()

Returns the default icon.

Returns:: the default Icon
See Also:: setIcon(javax.swing.Icon)

setIcon

public void setIcon(Icon defaultIcon)

Sets the button's default icon. This icon is also used as the "pressed" and "disabled" icon if there is no explicitly set pressed icon.

Parameters:: defaultIcon - the icon used as the default image
See Also:: getIcon(), setPressedIcon(javax.swing.Icon)

getPressedIcon

public Icon getPressedIcon()

Returns the pressed icon for the button.

Returns:: the pressedIcon property
See Also:: setPressedIcon(javax.swing.Icon)

setPressedIcon

public void setPressedIcon(Icon pressedIcon)

Sets the pressed icon for the button.

Parameters:: pressedIcon - the icon used as the "pressed" image
See Also:: getPressedIcon()

getSelectedIcon

public Icon getSelectedIcon()

Returns the selected icon for the button.

Returns:: the selectedIcon property
See Also:: setSelectedIcon(javax.swing.Icon)

setSelectedIcon

public void setSelectedIcon(Icon selectedIcon)

Sets the selected icon for the button.

Parameters:: selectedIcon - the icon used as the "selected" image
See Also:: getSelectedIcon()

getRolloverIcon

public Icon getRolloverIcon()

Returns the rollover icon for the button.

Returns:: the rolloverIcon property
See Also:: setRolloverIcon(javax.swing.Icon)

setRolloverIcon

public void setRolloverIcon(Icon rolloverIcon)

Sets the rollover icon for the button.

Parameters:: rolloverIcon - the icon used as the "rollover" image
See Also:: getRolloverIcon()

getRolloverSelectedIcon

public Icon getRolloverSelectedIcon()

Returns the rollover selection icon for the button.

Returns:: the rolloverSelectedIcon property
See Also:: setRolloverSelectedIcon(javax.swing.Icon)

setRolloverSelectedIcon

public void setRolloverSelectedIcon(Icon rolloverSelectedIcon)

Sets the rollover selected icon for the button.

Parameters:: rolloverSelectedIcon - the icon used as the "selected rollover" image
See Also:: getRolloverSelectedIcon()

getDisabledIcon

public Icon getDisabledIcon()

Returns the icon used by the button when it's disabled. If no disabled icon has been set, the button constructs one from the default icon.

Returns:: the disabledIcon property
See Also:: getPressedIcon(), setDisabledIcon(javax.swing.Icon)

setDisabledIcon

public void setDisabledIcon(Icon disabledIcon)

Sets the disabled icon for the button.

Parameters:: disabledIcon - the icon used as the disabled image
See Also:: getDisabledIcon()

getDisabledSelectedIcon

public Icon getDisabledSelectedIcon()

Returns the icon used by the button when it's disabled and selected. If not no disabled selection icon has been set, the button constructs one from the selection icon.

Returns:: the disabledSelectedIcon property
See Also:: getPressedIcon(), setDisabledIcon(javax.swing.Icon)

setDisabledSelectedIcon

public void setDisabledSelectedIcon(Icon disabledSelectedIcon)

Sets the disabled selection icon for the button.

Parameters:: disabledSelectedIcon - the icon used as the disabled selection image
See Also:: getDisabledSelectedIcon()

getVerticalAlignment

public int getVerticalAlignment()

Returns the vertical alignment of the text and icon.

Returns:

the verticalAlignment property, one of the following values:

SwingConstants.CENTER (the default)
SwingConstants.TOP
SwingConstants.BOTTOM

setVerticalAlignment

public void setVerticalAlignment(int alignment)

Sets the vertical alignment of the icon and text.

Parameters:

alignment - one of the following values:

SwingConstants.CENTER (the default)
SwingConstants.TOP
SwingConstants.BOTTOM

getHorizontalAlignment

public int getHorizontalAlignment()

Returns the horizontal alignment of the icon and text.

Returns:

the horizontalAlignment property, one of the following values:

SwingConstants.RIGHT (the default)
SwingConstants.LEFT
SwingConstants.CENTER
SwingConstants.LEADING
SwingConstants.TRAILING

setHorizontalAlignment

public void setHorizontalAlignment(int alignment)

Sets the horizontal alignment of the icon and text.

Parameters:

alignment - one of the following values:

SwingConstants.RIGHT (the default)
SwingConstants.LEFT
SwingConstants.CENTER
SwingConstants.LEADING
SwingConstants.TRAILING

getVerticalTextPosition

public int getVerticalTextPosition()

Returns the vertical position of the text relative to the icon.

Returns:

the verticalTextPosition property, one of the following values:

SwingConstants.CENTER (the default)
SwingConstants.TOP
SwingConstants.BOTTOM

setVerticalTextPosition

public void setVerticalTextPosition(int textPosition)

Sets the vertical position of the text relative to the icon.

Parameters:

textPosition - one of the following values:

SwingConstants.CENTER (the default)
SwingConstants.TOP
SwingConstants.BOTTOM

getHorizontalTextPosition

public int getHorizontalTextPosition()

Returns the horizontal position of the text relative to the icon.

Returns:

the horizontalTextPosition property, one of the following values:

SwingConstants.RIGHT
SwingConstants.LEFT
SwingConstants.CENTER
SwingConstants.LEADING
SwingConstants.TRAILING (the default)

setHorizontalTextPosition

public void setHorizontalTextPosition(int textPosition)

Sets the horizontal position of the text relative to the icon.

Parameters:

textPosition - one of the following values:

SwingConstants.RIGHT
SwingConstants.LEFT
SwingConstants.CENTER
SwingConstants.LEADING
SwingConstants.TRAILING (the default)

Throws:

IllegalArgumentException - if textPosition is not one of the legal values listed above

getIconTextGap

public int getIconTextGap()

Returns the amount of space between the text and the icon displayed in this button.

Returns:: an int equal to the number of pixels between the text and the icon.
Since:: 1.4
See Also:: setIconTextGap(int)

setIconTextGap

public void setIconTextGap(int iconTextGap)

If both the icon and text properties are set, this property defines the space between them.

The default value of this property is 4 pixels.

This is a JavaBeans bound property.

Since:: 1.4
See Also:: getIconTextGap()

checkHorizontalKey

protected int checkHorizontalKey(int key,
                                 String exception)

Verify that key is a legal value for the horizontalAlignment properties.

Parameters:

key - the property value to check, one of the following values:

SwingConstants.RIGHT (the default)
SwingConstants.LEFT
SwingConstants.CENTER
SwingConstants.LEADING
SwingConstants.TRAILING

exception - the IllegalArgumentException detail message

Throws:

IllegalArgumentException - if key is not one of the legal values listed above

checkVerticalKey

protected int checkVerticalKey(int key,
                               String exception)

Ensures that the key is a valid. Throws an IllegalArgumentException exception otherwise.

Parameters:

key - the value to check, one of the following values:

SwingConstants.CENTER (the default)
SwingConstants.TOP
SwingConstants.BOTTOM

exception - a string to be passed to the IllegalArgumentException call if key is not one of the valid values listed above

Throws:

IllegalArgumentException - if key is not one of the legal values listed above

setActionCommand

public void setActionCommand(String actionCommand)

Sets the action command for this button.

Parameters:: actionCommand - the action command for this button

getActionCommand

public String getActionCommand()

Returns the action command for this button.

Returns:: the action command for this button

setAction

public void setAction(Action a)

Sets the Action for the ActionEvent source. The new Action replaces any previously set Action but does not affect ActionListeners independently added with addActionListener. If the Action is already a registered ActionListener for the button, it is not re-registered.

A side-effect of setting the Action is that the ActionEvent source's properties are immediately set from the values in the Action (performed by the method configurePropertiesFromAction) and subsequently updated as the Action's properties change (via a PropertyChangeListener created by the method createActionPropertyChangeListener.

Parameters:: a - the Action for the AbstractButton, or null
Since:: 1.3
See Also:: Action, getAction(), configurePropertiesFromAction(javax.swing.Action), createActionPropertyChangeListener(javax.swing.Action)

isListener

private boolean isListener(Class c,
                           ActionListener a)

getAction

public Action getAction()

Returns the currently set Action for this ActionEvent source, or null if no Action is set.

Returns:: the Action for this ActionEvent source, or null
Since:: 1.3
See Also:: Action, setAction(javax.swing.Action)

configurePropertiesFromAction

protected void configurePropertiesFromAction(Action a)

Factory method which sets the ActionEvent source's properties according to values from the Action instance. The properties which are set may differ for subclasses. By default, the properties which get set are

Text, Icon,
 Enabled, ToolTipText, ActionCommand

, and Mnemonic.

If the Action passed in is null, the following things will occur:

the text is set to null,
the icon is set to null,
enabled is set to true,
the tooltip text is set to null

Parameters:: a - the Action from which to get the properties, or null
Since:: 1.3
See Also:: Action, setAction(javax.swing.Action)

configurePropertiesFromAction

void configurePropertiesFromAction(Action a,
                                   String[] types)

Configures the AbstractButton's properties according to values from the Action instance. Which properties to set is determined by the types parameter. types may hold the following keys:

Action.NAME - set the Text property from the Action,
Action.SHORT_DESCRIPTION - set the ToolTipText property from the Action,
Action.SMALL_ICON - set the Icon property from the Action,
Action.MNEMONIC - set the Mnemonic property from the Action,
Action.ACTION_COMMAND_KEY - set the ActionCommand property from the Action,
"enabled" - set Enabled property from the Action

If the Action passed in is null, the following things will occur:

the text is set to null,
the icon is set to null,
enabled is set to true,
the tooltip text is set to null
the mnemonic is set to '\0'

Parameters:: a - the Action from which to get the properties, or null; types - determines which properties to set from the Action
Since:: 1.4
See Also:: Action, setAction(javax.swing.Action), configurePropertiesFromAction(javax.swing.Action)

createActionPropertyChangeListener

protected java.beans.PropertyChangeListener createActionPropertyChangeListener(Action a)

Factory method which creates the PropertyChangeListener used to update the ActionEvent source as properties change on its Action instance. Subclasses may override this in order to provide their own PropertyChangeListener if the set of properties which should be kept up to date differs from the default properties (

Text, Icon, Enabled, ToolTipText,
 Mnemonic

Note that PropertyChangeListeners should avoid holding strong references to the ActionEvent source, as this may hinder garbage collection of the ActionEvent source and all components in its containment hierarchy.

Parameters:: a - the new action for the button
Since:: 1.3
See Also:: Action, setAction(javax.swing.Action)

isBorderPainted

public boolean isBorderPainted()

Gets the borderPainted property.

Returns:: the value of the borderPainted property
See Also:: setBorderPainted(boolean)

setBorderPainted

public void setBorderPainted(boolean b)

Sets the borderPainted property. If true and the button has a border, the border is painted. The default value for the borderPainted property is true.

Parameters:: b - if true and border property is not null, the border is painted
See Also:: isBorderPainted()

paintBorder

protected void paintBorder(Graphics g)

Paint the button's border if BorderPainted property is true and the button has a border.

Overrides:: paintBorder in class JComponent

Parameters:: g - the Graphics context in which to paint
See Also:: JComponent.paint(java.awt.Graphics), JComponent.setBorder(javax.swing.border.Border)

isFocusPainted

public boolean isFocusPainted()

Gets the paintFocus property.

Returns:: the paintFocus property
See Also:: setFocusPainted(boolean)

setFocusPainted

public void setFocusPainted(boolean b)

Sets the paintFocus property, which must be true for the focus state to be painted. The default value for the paintFocus property is true. Some look and feels might not paint focus state; they will ignore this property.

Parameters:: b - if true, the focus state should be painted
See Also:: isFocusPainted()

isContentAreaFilled

public boolean isContentAreaFilled()

Gets the contentAreaFilled property.

Returns:: the contentAreaFilled property
See Also:: setContentAreaFilled(boolean)

setContentAreaFilled

public void setContentAreaFilled(boolean b)

Sets the contentAreaFilled property. If true the button will paint the content area. If you wish to have a transparent button, such as an icon only button, for example, then you should set this to false. Do not call setOpaque(false). The default value for the the contentAreaFilled property is true.

This function may cause the component's opaque property to change.

The exact behavior of calling this function varies on a component-by-component and L&F-by-L&F basis.

Parameters:: b - if true, the content should be filled; if false the content area is not filled
See Also:: isContentAreaFilled(), JComponent.setOpaque(boolean)

isRolloverEnabled

public boolean isRolloverEnabled()

Gets the rolloverEnabled property.

Returns:: the value of the rolloverEnabled property
See Also:: setRolloverEnabled(boolean)

setRolloverEnabled

public void setRolloverEnabled(boolean b)

Sets the rolloverEnabled property, which must be true for rollover effects to occur. The default value for the rolloverEnabled property is false. Some look and feels might not implement rollover effects; they will ignore this property.

Parameters:: b - if true, rollover effects should be painted
See Also:: isRolloverEnabled()

getMnemonic

public int getMnemonic()

Returns the keyboard mnemonic from the the current model.

Returns:: the keyboard mnemonic from the model

setMnemonic

public void setMnemonic(int mnemonic)

Sets the keyboard mnemonic on the current model. The mnemonic is the key which when combined with the look and feel's mouseless modifier (usually Alt) will activate this button if focus is contained somewhere within this button's ancestor window.

A mnemonic must correspond to a single key on the keyboard and should be specified using one of the VK_XXX keycodes defined in java.awt.event.KeyEvent. Mnemonics are case-insensitive, therefore a key event with the corresponding keycode would cause the button to be activated whether or not the Shift modifier was pressed.

If the character defined by the mnemonic is found within the button's label string, the first occurrence of it will be underlined to indicate the mnemonic to the user.

Parameters:: mnemonic - the key code which represents the mnemonic
See Also:: KeyEvent, setDisplayedMnemonicIndex(int)

setMnemonic

public void setMnemonic(char mnemonic)

This method is now obsolete, please use setMnemonic(int) to set the mnemonic for a button. This method is only designed to handle character values which fall between 'a' and 'z' or 'A' and 'Z'.

Parameters:: mnemonic - a char specifying the mnemonic value
See Also:: setMnemonic(int)

setDisplayedMnemonicIndex

public void setDisplayedMnemonicIndex(int index)
                               throws IllegalArgumentException

Provides a hint to the look and feel as to which character in the text should be decorated to represent the mnemonic. Not all look and feels may support this. A value of -1 indicates either there is no mnemonic, the mnemonic character is not contained in the string, or the developer does not wish the mnemonic to be displayed.

The value of this is updated as the properties relating to the mnemonic change (such as the mnemonic itself, the text...). You should only ever have to call this if you do not wish the default character to be underlined. For example, if the text was 'Save As', with a mnemonic of 'a', and you wanted the 'A' to be decorated, as 'Save As', you would have to invoke setDisplayedMnemonicIndex(5) after invoking setMnemonic(KeyEvent.VK_A).

Parameters:: index - Index into the String to underline
Throws:: IllegalArgumentException - will be thrown if index is >= length of the text, or < -1
Since:: 1.4
See Also:: getDisplayedMnemonicIndex()

getDisplayedMnemonicIndex

public int getDisplayedMnemonicIndex()

Returns the character, as an index, that the look and feel should provide decoration for as representing the mnemonic character.

Returns:: index representing mnemonic character
Since:: 1.4
See Also:: setDisplayedMnemonicIndex(int)

updateDisplayedMnemonicIndex

private void updateDisplayedMnemonicIndex(String text,
                                          int mnemonic)

Update the displayedMnemonicIndex property. This method is called when either text or mnemonic changes. The new value of the displayedMnemonicIndex property is the index of the first occurrence of mnemonic in text.

updateMnemonicProperties

private void updateMnemonicProperties()

Brings the mnemonic property in accordance with model's mnemonic. This is called when model's mnemonic changes. Also updates the displayedMnemonicIndex property.

setMultiClickThreshhold

public void setMultiClickThreshhold(long threshhold)

Sets the amount of time (in milliseconds) required between mouse press events for the button to generate the corresponding action events. After the initial mouse press occurs (and action event generated) any subsequent mouse press events which occur on intervals less than the threshhold will be ignored and no corresponding action event generated. By default the threshhold is 0, which means that for each mouse press, an action event will be fired, no matter how quickly the mouse clicks occur. In buttons where this behavior is not desirable (for example, the "OK" button in a dialog), this threshhold should be set to an appropriate positive value.

Parameters:: threshhold - the amount of time required between mouse press events to generate corresponding action events
Throws:: IllegalArgumentException - if threshhold < 0
Since:: 1.4
See Also:: getMultiClickThreshhold()

getMultiClickThreshhold

public long getMultiClickThreshhold()

Gets the amount of time (in milliseconds) required between mouse press events for the button to generate the corresponding action events.

Returns:: the amount of time required between mouse press events to generate corresponding action events
Since:: 1.4
See Also:: setMultiClickThreshhold(long)

getModel

public ButtonModel getModel()

Returns the model that this button represents.

Returns:: the model property
See Also:: setModel(javax.swing.ButtonModel)

setModel

public void setModel(ButtonModel newModel)

Sets the model that this button represents.

Parameters:: newModel - the new ButtonModel
See Also:: getModel()

getUI

public ButtonUI getUI()

Returns the L&F object that renders this component.

Returns:: the ButtonUI object
See Also:: setUI(javax.swing.plaf.ButtonUI)

setUI

public void setUI(ButtonUI ui)

Sets the L&F object that renders this component.

Parameters:: ui - the ButtonUI L&F object
See Also:: getUI()

updateUI

public void updateUI()

Resets the UI property to a value from the current look and feel. Subtypes of AbstractButton should override this to update the UI. For example, JButton might do the following:

      setUI((ButtonUI)UIManager.getUI(
          "ButtonUI", "javax.swing.plaf.basic.BasicButtonUI", this));

Overrides:: updateUI in class JComponent

See Also:: JComponent.setUI(javax.swing.plaf.ComponentUI), UIManager.getLookAndFeel(), UIManager.getUI(javax.swing.JComponent)

addChangeListener

public void addChangeListener(ChangeListener l)

Adds a ChangeListener to the button.

Parameters:: l - the listener to be added

removeChangeListener

public void removeChangeListener(ChangeListener l)

Removes a ChangeListener from the button.

Parameters:: l - the listener to be removed

getChangeListeners

public ChangeListener[] getChangeListeners()

Returns an array of all the ChangeListeners added to this AbstractButton with addChangeListener().

Returns:: all of the ChangeListeners added or an empty array if no listeners have been added
Since:: 1.4

fireStateChanged

protected void fireStateChanged()

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created.

See Also:: EventListenerList

addActionListener

public void addActionListener(ActionListener l)

Adds an ActionListener to the button.

Parameters:: l - the ActionListener to be added

removeActionListener

public void removeActionListener(ActionListener l)

Removes an ActionListener from the button. If the listener is the currently set Action for the button, then the Action is set to null.

Parameters:: l - the listener to be removed

getActionListeners

public ActionListener[] getActionListeners()

Returns an array of all the ActionListeners added to this AbstractButton with addActionListener().

Returns:: all of the ActionListeners added or an empty array if no listeners have been added
Since:: 1.4

createChangeListener

protected ChangeListener createChangeListener()

Subclasses that want to handle ChangeEvents differently can override this to return another ChangeListener implementation.

Returns:: the new ButtonChangeListener

fireActionPerformed

protected void fireActionPerformed(ActionEvent event)

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the event parameter.

Parameters:: event - the ActionEvent object
See Also:: EventListenerList

fireItemStateChanged

protected void fireItemStateChanged(ItemEvent event)

Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created using the event parameter.

Parameters:: event - the ItemEvent object
See Also:: EventListenerList

createActionListener

protected ActionListener createActionListener()

createItemListener

protected ItemListener createItemListener()

setEnabled

public void setEnabled(boolean b)

Enables (or disables) the button.

Overrides:: setEnabled in class JComponent

Parameters:: b - true to enable the button, otherwise false
See Also:: Component.isEnabled(), Component.isLightweight()

getLabel

public String getLabel()

Deprecated. - Replaced by getText

Returns the label text.

Returns:: a String containing the label

setLabel

public void setLabel(String label)

Deprecated. - Replaced by setText(text)

Sets the label text.

Parameters:: label - a String containing the text

addItemListener

public void addItemListener(ItemListener l)

Adds an ItemListener to the checkbox.

Specified by:: addItemListener in interface ItemSelectable

Parameters:: l - the ItemListener to be added
See Also:: ItemEvent

removeItemListener

public void removeItemListener(ItemListener l)

Removes an ItemListener from the button.

Specified by:: removeItemListener in interface ItemSelectable

Parameters:: l - the ItemListener to be removed
See Also:: ItemEvent

getItemListeners

public ItemListener[] getItemListeners()

Returns an array of all the ItemListeners added to this AbstractButton with addItemListener().

Returns:: all of the ItemListeners added or an empty array if no listeners have been added
Since:: 1.4

getSelectedObjects

public Object[] getSelectedObjects()

Returns an array (length 1) containing the label or null if the button is not selected.

Specified by:: getSelectedObjects in interface ItemSelectable

Returns:: an array containing 1 Object: the text of the button, if the item is selected; otherwise null

init

protected void init(String text,
                    Icon icon)

imageUpdate

public boolean imageUpdate(Image img,
                           int infoflags,
                           int x,
                           int y,
                           int w,
                           int h)

This is overridden to return false if the current Icon's Image is not equal to the passed in Image img.

Specified by:: imageUpdate in interface ImageObserver
Overrides:: imageUpdate in class Component

Parameters:: img - the Image to be compared; infoflags - flags used to repaint the button when the image is updated and which determine how much is to be painted; x - the x coordinate; y - the y coordinate; w - the width; h - the height
Returns:: false if the infoflags indicate that the image is completely loaded; true otherwise.
See Also:: ImageObserver, Component.imageUpdate(java.awt.Image, int, int, int, int, int)

paramString

protected String paramString()

Returns a string representation of this AbstractButton. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.

Overriding paramString to provide information about the specific new aspects of the JFC components.

Overrides:: paramString in class JComponent

Returns:: a string representation of this AbstractButton

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javax.swing Class AbstractButton

MODEL_CHANGED_PROPERTY

TEXT_CHANGED_PROPERTY

MNEMONIC_CHANGED_PROPERTY

MARGIN_CHANGED_PROPERTY

VERTICAL_ALIGNMENT_CHANGED_PROPERTY

HORIZONTAL_ALIGNMENT_CHANGED_PROPERTY

VERTICAL_TEXT_POSITION_CHANGED_PROPERTY

HORIZONTAL_TEXT_POSITION_CHANGED_PROPERTY

BORDER_PAINTED_CHANGED_PROPERTY

FOCUS_PAINTED_CHANGED_PROPERTY

ROLLOVER_ENABLED_CHANGED_PROPERTY

CONTENT_AREA_FILLED_CHANGED_PROPERTY

ICON_CHANGED_PROPERTY

PRESSED_ICON_CHANGED_PROPERTY

SELECTED_ICON_CHANGED_PROPERTY

ROLLOVER_ICON_CHANGED_PROPERTY

ROLLOVER_SELECTED_ICON_CHANGED_PROPERTY

DISABLED_ICON_CHANGED_PROPERTY

DISABLED_SELECTED_ICON_CHANGED_PROPERTY

model

text

margin

defaultMargin

defaultIcon

pressedIcon

disabledIcon

selectedIcon

disabledSelectedIcon

rolloverIcon

rolloverSelectedIcon

paintBorder

paintFocus

rolloverEnabled

contentAreaFilled

verticalAlignment

horizontalAlignment

verticalTextPosition

horizontalTextPosition

iconTextGap

mnemonic

mnemonicIndex

multiClickThreshhold

accessibleIcon

changeListener

actionListener

itemListener

changeEvent

action

actionPropertyChangeListener

AbstractButton

getText

setText

isSelected

setSelected

doClick

doClick

setMargin

getMargin

getIcon

setIcon

getPressedIcon

setPressedIcon

getSelectedIcon

setSelectedIcon

getRolloverIcon

setRolloverIcon

getRolloverSelectedIcon

setRolloverSelectedIcon

getDisabledIcon

setDisabledIcon

getDisabledSelectedIcon

setDisabledSelectedIcon

getVerticalAlignment

setVerticalAlignment

getHorizontalAlignment

setHorizontalAlignment

getVerticalTextPosition

setVerticalTextPosition

getHorizontalTextPosition

javax.swing
Class AbstractButton