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javax.swing
Class JScrollBar
java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JScrollBar
-
All Implemented Interfaces:
-
Adjustable
,
ImageObserver
,
MenuContainer
,
Serializable
,
Accessible
-
Direct Known Subclasses:
-
JScrollPane.ScrollBar
-
public class JScrollBar
- extends JComponent
- implements Adjustable, Accessible
An implementation of a scrollbar. The user positions the knob in the scrollbar to determine the contents of the viewing area. The program typically adjusts the display so that the end of the scrollbar represents the end of the displayable contents, or 100% of the contents. The start of the scrollbar is the beginning of the displayable contents, or 0%. The position of the knob within those bounds then translates to the corresponding percentage of the displayable contents.
Typically, as the position of the knob in the scrollbar changes a corresponding change is made to the position of the JViewport on the underlying view, changing the contents of the JViewport.
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
.
-
See Also:
-
JScrollPane
Nested Class Summary
|
protected class |
JScrollBar.AccessibleJScrollBar
This class implements accessibility support for the JScrollBar class. |
Nested classes/interfaces inherited from class javax.swing.
JComponent
|
JComponent.AccessibleJComponent
|
Nested classes/interfaces inherited from class java.awt.
Container
|
Container.AccessibleAWTContainer
|
Field Summary
|
protected int |
blockIncrement
|
protected
BoundedRangeModel
|
model
The model that represents the scrollbar's minimum, maximum, extent (aka "visibleAmount") and current value. |
protected int |
orientation
|
protected int |
unitIncrement
|
Fields inherited from interface java.awt.
Adjustable
|
HORIZONTAL
,
NO_ORIENTATION
,
VERTICAL
|
Fields inherited from interface java.awt.image.
ImageObserver
|
ABORT
,
ALLBITS
,
ERROR
,
FRAMEBITS
,
HEIGHT
,
PROPERTIES
,
SOMEBITS
,
WIDTH
|
Constructor Summary
|
JScrollBar
()
Creates a vertical scrollbar with the following initial values: |
JScrollBar
(int orientation)
Creates a scrollbar with the specified orientation and the following initial values: |
JScrollBar
(int orientation, int value, int extent, int min, int max)
Creates a scrollbar with the specified orientation, value, extent, minimum, and maximum. |
Method Summary
|
void |
addAdjustmentListener
(
AdjustmentListener
l)
Adds an AdjustmentListener. |
protected void |
fireAdjustmentValueChanged
(int id, int type, int value)
|
AccessibleContext
|
getAccessibleContext
()
Gets the AccessibleContext associated with this JScrollBar. |
AdjustmentListener
[] |
getAdjustmentListeners
()
Returns an array of all the AdjustmentListeners added to this JScrollBar with addAdjustmentListener(). |
int |
getBlockIncrement
()
For backwards compatibility with java.awt.Scrollbar. |
int |
getBlockIncrement
(int direction)
Returns the amount to change the scrollbar's value by, given a block (usually "page") up/down request. |
int |
getMaximum
()
The maximum value of the scrollbar is maximum - extent. |
Dimension
|
getMaximumSize
()
The scrollbar is flexible along it's scrolling axis and rigid along the other axis. |
int |
getMinimum
()
Returns the minimum value supported by the scrollbar (usually zero). |
Dimension
|
getMinimumSize
()
The scrollbar is flexible along it's scrolling axis and rigid along the other axis. |
BoundedRangeModel
|
getModel
()
Returns data model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent. |
int |
getOrientation
()
Returns the component's orientation (horizontal or vertical). |
ScrollBarUI
|
getUI
()
Returns the delegate that implements the look and feel for this component. |
String
|
getUIClassID
()
Returns the name of the LookAndFeel class for this component. |
int |
getUnitIncrement
()
For backwards compatibility with java.awt.Scrollbar. |
int |
getUnitIncrement
(int direction)
Returns the amount to change the scrollbar's value by, given a unit up/down request. |
int |
getValue
()
Returns the scrollbar's value. |
boolean |
getValueIsAdjusting
()
True if the scrollbar knob is being dragged. |
int |
getVisibleAmount
()
Returns the scrollbar's extent, aka its "visibleAmount". |
protected
String
|
paramString
()
Returns a string representation of this JScrollBar. |
void |
removeAdjustmentListener
(
AdjustmentListener
l)
Removes an AdjustmentEvent listener. |
void |
setBlockIncrement
(int blockIncrement)
Sets the blockIncrement property. |
void |
setEnabled
(boolean x)
Enables the component so that the knob position can be changed. |
void |
setMaximum
(int maximum)
Sets the model's maximum property. |
void |
setMinimum
(int minimum)
Sets the model's minimum property. |
void |
setModel
(
BoundedRangeModel
newModel)
Sets the model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent. |
void |
setOrientation
(int orientation)
Set the scrollbar's orientation to either VERTICAL or HORIZONTAL. |
void |
setUI
(
ScrollBarUI
ui)
Sets the L&F object that renders this component. |
void |
setUnitIncrement
(int unitIncrement)
Sets the unitIncrement property. |
void |
setValue
(int value)
Sets the scrollbar's value. |
void |
setValueIsAdjusting
(boolean b)
Sets the model's valueIsAdjusting property. |
void |
setValues
(int newValue, int newExtent, int newMin, int newMax)
Sets the four BoundedRangeModel properties after forcing the arguments to obey the usual constraints: |
void |
setVisibleAmount
(int extent)
Set the model's extent property. |
void |
updateUI
()
Overrides JComponent.updateUI. |
Methods inherited from class javax.swing.
JComponent
|
addAncestorListener
,
addNotify
,
addVetoableChangeListener
,
computeVisibleRect
,
contains
,
createToolTip
,
disable
,
enable
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
fireVetoableChange
,
getActionForKeyStroke
,
getActionMap
,
getAlignmentX
,
getAlignmentY
,
getAncestorListeners
,
getAutoscrolls
,
getBaseline
,
getBaselineResizeBehavior
,
getBorder
,
getBounds
,
getClientProperty
,
getComponentGraphics
,
getComponentPopupMenu
,
getConditionForKeyStroke
,
getDebugGraphicsOptions
,
getDefaultLocale
,
getFontMetrics
,
getGraphics
,
getHeight
,
getInheritsPopupMenu
,
getInputMap
,
getInputMap
,
getInputVerifier
,
getInsets
,
getInsets
,
getListeners
,
getLocation
,
getNextFocusableComponent
,
getPopupLocation
,
getPreferredSize
,
getRegisteredKeyStrokes
,
getRootPane
,
getSize
,
getToolTipLocation
,
getToolTipText
,
getToolTipText
,
getTopLevelAncestor
,
getTransferHandler
,
getVerifyInputWhenFocusTarget
,
getVetoableChangeListeners
,
getVisibleRect
,
getWidth
,
getX
,
getY
,
grabFocus
,
isDoubleBuffered
,
isLightweightComponent
,
isManagingFocus
,
isOpaque
,
isOptimizedDrawingEnabled
,
isPaintingForPrint
,
isPaintingTile
,
isRequestFocusEnabled
,
isValidateRoot
,
paint
,
paintBorder
,
paintChildren
,
paintComponent
,
paintImmediately
,
paintImmediately
,
print
,
printAll
,
printBorder
,
printChildren
,
printComponent
,
processComponentKeyEvent
,
processKeyBinding
,
processKeyEvent
,
processMouseEvent
,
processMouseMotionEvent
,
putClientProperty
,
registerKeyboardAction
,
registerKeyboardAction
,
removeAncestorListener
,
removeNotify
,
removeVetoableChangeListener
,
repaint
,
repaint
,
requestDefaultFocus
,
requestFocus
,
requestFocus
,
requestFocusInWindow
,
requestFocusInWindow
,
resetKeyboardActions
,
reshape
,
revalidate
,
scrollRectToVisible
,
setActionMap
,
setAlignmentX
,
setAlignmentY
,
setAutoscrolls
,
setBackground
,
setBorder
,
setComponentPopupMenu
,
setDebugGraphicsOptions
,
setDefaultLocale
,
setDoubleBuffered
,
setFocusTraversalKeys
,
setFont
,
setForeground
,
setInheritsPopupMenu
,
setInputMap
,
setInputVerifier
,
setMaximumSize
,
setMinimumSize
,
setNextFocusableComponent
,
setOpaque
,
setPreferredSize
,
setRequestFocusEnabled
,
setToolTipText
,
setTransferHandler
,
setUI
,
setVerifyInputWhenFocusTarget
,
setVisible
,
unregisterKeyboardAction
,
update
|
Methods inherited from class java.awt.
Container
|
add
,
add
,
add
,
add
,
add
,
addContainerListener
,
addImpl
,
addPropertyChangeListener
,
addPropertyChangeListener
,
applyComponentOrientation
,
areFocusTraversalKeysSet
,
countComponents
,
deliverEvent
,
doLayout
,
findComponentAt
,
findComponentAt
,
getComponent
,
getComponentAt
,
getComponentAt
,
getComponentCount
,
getComponents
,
getComponentZOrder
,
getContainerListeners
,
getFocusTraversalKeys
,
getFocusTraversalPolicy
,
getLayout
,
getMousePosition
,
insets
,
invalidate
,
isAncestorOf
,
isFocusCycleRoot
,
isFocusCycleRoot
,
isFocusTraversalPolicyProvider
,
isFocusTraversalPolicySet
,
layout
,
list
,
list
,
locate
,
minimumSize
,
paintComponents
,
preferredSize
,
printComponents
,
processContainerEvent
,
processEvent
,
remove
,
remove
,
removeAll
,
removeContainerListener
,
setComponentZOrder
,
setFocusCycleRoot
,
setFocusTraversalPolicy
,
setFocusTraversalPolicyProvider
,
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
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
firePropertyChange
,
getBackground
,
getBounds
,
getColorModel
,
getComponentListeners
,
getComponentOrientation
,
getCursor
,
getDropTarget
,
getFocusCycleRootAncestor
,
getFocusListeners
,
getFocusTraversalKeysEnabled
,
getFont
,
getForeground
,
getGraphicsConfiguration
,
getHierarchyBoundsListeners
,
getHierarchyListeners
,
getIgnoreRepaint
,
getInputContext
,
getInputMethodListeners
,
getInputMethodRequests
,
getKeyListeners
,
getLocale
,
getLocation
,
getLocationOnScreen
,
getMouseListeners
,
getMouseMotionListeners
,
getMousePosition
,
getMouseWheelListeners
,
getName
,
getParent
,
getPeer
,
getPropertyChangeListeners
,
getPropertyChangeListeners
,
getSize
,
getToolkit
,
getTreeLock
,
gotFocus
,
handleEvent
,
hasFocus
,
hide
,
imageUpdate
,
inside
,
isBackgroundSet
,
isCursorSet
,
isDisplayable
,
isEnabled
,
isFocusable
,
isFocusOwner
,
isFocusTraversable
,
isFontSet
,
isForegroundSet
,
isLightweight
,
isMaximumSizeSet
,
isMinimumSizeSet
,
isPreferredSizeSet
,
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
,
processMouseWheelEvent
,
remove
,
removeComponentListener
,
removeFocusListener
,
removeHierarchyBoundsListener
,
removeHierarchyListener
,
removeInputMethodListener
,
removeKeyListener
,
removeMouseListener
,
removeMouseMotionListener
,
removeMouseWheelListener
,
removePropertyChangeListener
,
removePropertyChangeListener
,
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
|
model
protected BoundedRangeModel model
-
The model that represents the scrollbar's minimum, maximum, extent (aka "visibleAmount") and current value.
-
See Also:
-
setModel(javax.swing.BoundedRangeModel)
orientation
protected int orientation
-
See Also:
-
setOrientation(int)
unitIncrement
protected int unitIncrement
-
See Also:
-
setUnitIncrement(int)
blockIncrement
protected int blockIncrement
-
See Also:
-
setBlockIncrement(int)
JScrollBar
public JScrollBar(int orientation,
int value,
int extent,
int min,
int max)
-
Creates a scrollbar with the specified orientation, value, extent, minimum, and maximum. The "extent" is the size of the viewable area. It is also known as the "visible amount".
Note: Use setBlockIncrement to set the block increment to a size slightly smaller than the view's extent. That way, when the user jumps the knob to an adjacent position, one or two lines of the original contents remain in view.
-
Throws:
-
IllegalArgumentException
- if orientation is not one of VERTICAL, HORIZONTAL
-
See Also:
-
setOrientation(int)
,
setValue(int)
,
setVisibleAmount(int)
,
setMinimum(int)
,
setMaximum(int)
JScrollBar
public JScrollBar(int orientation)
-
Creates a scrollbar with the specified orientation and the following initial values:
minimum = 0
maximum = 100
value = 0
extent = 10
JScrollBar
public JScrollBar()
-
Creates a vertical scrollbar with the following initial values:
minimum = 0
maximum = 100
value = 0
extent = 10
setUI
public void setUI(ScrollBarUI ui)
-
Sets the L&F object that renders this component.
-
-
-
Parameters:
-
ui - the ScrollBarUI L&F object
-
Since:
-
1.4
-
See Also:
-
UIDefaults.getUI(javax.swing.JComponent)
getUI
public ScrollBarUI getUI()
-
Returns the delegate that implements the look and feel for this component.
-
-
-
See Also:
-
JComponent.setUI(javax.swing.plaf.ComponentUI)
updateUI
public void updateUI()
-
Overrides JComponent.updateUI.
-
-
Overrides:
-
updateUI
in class
JComponent
-
-
See Also:
-
JComponent.updateUI()
getUIClassID
public String getUIClassID()
-
Returns the name of the LookAndFeel class for this component.
-
-
Overrides:
-
getUIClassID
in class
JComponent
-
-
Returns:
-
"ScrollBarUI"
-
See Also:
-
JComponent.getUIClassID()
,
UIDefaults.getUI(javax.swing.JComponent)
getOrientation
public int getOrientation()
-
Returns the component's orientation (horizontal or vertical).
-
-
Specified by:
-
getOrientation
in interface
Adjustable
-
-
Returns:
-
VERTICAL or HORIZONTAL
-
See Also:
-
setOrientation(int)
,
Adjustable.getOrientation()
setOrientation
public void setOrientation(int orientation)
-
Set the scrollbar's orientation to either VERTICAL or HORIZONTAL.
-
-
-
Throws:
-
IllegalArgumentException
- if orientation is not one of VERTICAL, HORIZONTAL
-
See Also:
-
getOrientation()
getModel
public BoundedRangeModel getModel()
-
Returns data model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent.
-
-
-
See Also:
-
setModel(javax.swing.BoundedRangeModel)
setModel
public void setModel(BoundedRangeModel newModel)
-
Sets the model that handles the scrollbar's four fundamental properties: minimum, maximum, value, extent.
-
-
-
See Also:
-
getModel()
getUnitIncrement
public int getUnitIncrement(int direction)
-
Returns the amount to change the scrollbar's value by, given a unit up/down request. A ScrollBarUI implementation typically calls this method when the user clicks on a scrollbar up/down arrow and uses the result to update the scrollbar's value. Subclasses my override this method to compute a value, e.g. the change required to scroll up or down one (variable height) line text or one row in a table.
The JScrollPane component creates scrollbars (by default) that override this method and delegate to the viewports Scrollable view, if it has one. The Scrollable interface provides a more specialized version of this method.
-
-
-
Parameters:
-
direction - is -1 or 1 for up/down respectively
-
Returns:
-
the value of the unitIncrement property
-
See Also:
-
setUnitIncrement(int)
,
setValue(int)
,
Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)
setUnitIncrement
public void setUnitIncrement(int unitIncrement)
-
Sets the unitIncrement property.
Note, that if the argument is equal to the value of Integer.MIN_VALUE, the most look and feels will not provide the scrolling to the right/down.
-
-
Specified by:
-
setUnitIncrement
in interface
Adjustable
-
-
Parameters:
-
unitIncrement - the unit increment
-
See Also:
-
getUnitIncrement(int)
getBlockIncrement
public int getBlockIncrement(int direction)
-
Returns the amount to change the scrollbar's value by, given a block (usually "page") up/down request. A ScrollBarUI implementation typically calls this method when the user clicks above or below the scrollbar "knob" to change the value up or down by large amount. Subclasses my override this method to compute a value, e.g. the change required to scroll up or down one paragraph in a text document.
The JScrollPane component creates scrollbars (by default) that override this method and delegate to the viewports Scrollable view, if it has one. The Scrollable interface provides a more specialized version of this method.
-
-
-
Parameters:
-
direction - is -1 or 1 for up/down respectively
-
Returns:
-
the value of the blockIncrement property
-
See Also:
-
setBlockIncrement(int)
,
setValue(int)
,
Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)
setBlockIncrement
public void setBlockIncrement(int blockIncrement)
-
Sets the blockIncrement property.
Note, that if the argument is equal to the value of Integer.MIN_VALUE, the most look and feels will not provide the scrolling to the right/down.
-
-
Specified by:
-
setBlockIncrement
in interface
Adjustable
-
-
Parameters:
-
blockIncrement - the block increment
-
See Also:
-
getBlockIncrement()
getUnitIncrement
public int getUnitIncrement()
-
For backwards compatibility with java.awt.Scrollbar.
-
-
Specified by:
-
getUnitIncrement
in interface
Adjustable
-
-
Returns:
-
the unit value increment for the adjustable object
-
See Also:
-
Adjustable.getUnitIncrement()
,
getUnitIncrement(int)
getBlockIncrement
public int getBlockIncrement()
-
For backwards compatibility with java.awt.Scrollbar.
-
-
Specified by:
-
getBlockIncrement
in interface
Adjustable
-
-
Returns:
-
the block value increment for the adjustable object
-
See Also:
-
Adjustable.getBlockIncrement()
,
getBlockIncrement(int)
getValue
public int getValue()
-
Returns the scrollbar's value.
-
-
Specified by:
-
getValue
in interface
Adjustable
-
-
Returns:
-
the model's value property
-
See Also:
-
setValue(int)
setValue
public void setValue(int value)
-
Sets the scrollbar's value. This method just forwards the value to the model.
-
-
Specified by:
-
setValue
in interface
Adjustable
-
-
Parameters:
-
value - the current value, between minimum and maximum - visibleAmount
-
See Also:
-
getValue()
,
BoundedRangeModel.setValue(int)
getVisibleAmount
public int getVisibleAmount()
-
Returns the scrollbar's extent, aka its "visibleAmount". In many scrollbar look and feel implementations the size of the scrollbar "knob" or "thumb" is proportional to the extent.
-
-
Specified by:
-
getVisibleAmount
in interface
Adjustable
-
-
Returns:
-
the value of the model's extent property
-
See Also:
-
setVisibleAmount(int)
setVisibleAmount
public void setVisibleAmount(int extent)
-
Set the model's extent property.
-
-
Specified by:
-
setVisibleAmount
in interface
Adjustable
-
-
Parameters:
-
extent - the length of the indicator
-
See Also:
-
getVisibleAmount()
,
BoundedRangeModel.setExtent(int)
getMinimum
public int getMinimum()
-
Returns the minimum value supported by the scrollbar (usually zero).
-
-
Specified by:
-
getMinimum
in interface
Adjustable
-
-
Returns:
-
the value of the model's minimum property
-
See Also:
-
setMinimum(int)
setMinimum
public void setMinimum(int minimum)
-
Sets the model's minimum property.
-
-
Specified by:
-
setMinimum
in interface
Adjustable
-
-
Parameters:
-
minimum - the minimum value
-
See Also:
-
getMinimum()
,
BoundedRangeModel.setMinimum(int)
getMaximum
public int getMaximum()
-
The maximum value of the scrollbar is maximum - extent.
-
-
Specified by:
-
getMaximum
in interface
Adjustable
-
-
Returns:
-
the value of the model's maximum property
-
See Also:
-
setMaximum(int)
setMaximum
public void setMaximum(int maximum)
-
Sets the model's maximum property. Note that the scrollbar's value can only be set to maximum - extent.
-
-
Specified by:
-
setMaximum
in interface
Adjustable
-
-
Parameters:
-
maximum - the maximum value
-
See Also:
-
getMaximum()
,
BoundedRangeModel.setMaximum(int)
getValueIsAdjusting
public boolean getValueIsAdjusting()
-
True if the scrollbar knob is being dragged.
-
-
-
Returns:
-
the value of the model's valueIsAdjusting property
-
See Also:
-
setValueIsAdjusting(boolean)
setValueIsAdjusting
public void setValueIsAdjusting(boolean b)
-
Sets the model's valueIsAdjusting property. Scrollbar look and feel implementations should set this property to true when a knob drag begins, and to false when the drag ends. The scrollbar model will not generate ChangeEvents while valueIsAdjusting is true.
-
-
-
See Also:
-
getValueIsAdjusting()
,
BoundedRangeModel.setValueIsAdjusting(boolean)
setValues
public void setValues(int newValue,
int newExtent,
int newMin,
int newMax)
-
Sets the four BoundedRangeModel properties after forcing the arguments to obey the usual constraints:
minimum <= value <= value+extent <= maximum
-
-
-
See Also:
-
BoundedRangeModel.setRangeProperties(int, int, int, int, boolean)
,
setValue(int)
,
setVisibleAmount(int)
,
setMinimum(int)
,
setMaximum(int)
addAdjustmentListener
public void addAdjustmentListener(AdjustmentListener l)
-
Adds an AdjustmentListener. Adjustment listeners are notified each time the scrollbar's model changes. Adjustment events are provided for backwards compatibility with java.awt.Scrollbar.
Note that the AdjustmentEvents type property will always have a placeholder value of AdjustmentEvent.TRACK because all changes to a BoundedRangeModels value are considered equivalent. To change the value of a BoundedRangeModel one just sets its value property, i.e. model.setValue(123). No information about the origin of the change, e.g. it's a block decrement, is provided. We don't try fabricate the origin of the change here.
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Specified by:
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addAdjustmentListener
in interface
Adjustable
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Parameters:
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l - the AdjustmentLister to add
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See Also:
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removeAdjustmentListener(java.awt.event.AdjustmentListener)
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BoundedRangeModel.addChangeListener(javax.swing.event.ChangeListener)
removeAdjustmentListener
public void removeAdjustmentListener(AdjustmentListener l)
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Removes an AdjustmentEvent listener.
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Specified by:
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removeAdjustmentListener
in interface
Adjustable
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Parameters:
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l - the AdjustmentLister to remove
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See Also:
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addAdjustmentListener(java.awt.event.AdjustmentListener)
getAdjustmentListeners
public AdjustmentListener[] getAdjustmentListeners()
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Returns an array of all the AdjustmentListeners added to this JScrollBar with addAdjustmentListener().
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Returns:
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all of the AdjustmentListeners added or an empty array if no listeners have been added
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Since:
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1.4
fireAdjustmentValueChanged
protected void fireAdjustmentValueChanged(int id,
int type,
int value)
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getMinimumSize
public Dimension getMinimumSize()
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The scrollbar is flexible along it's scrolling axis and rigid along the other axis.
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Overrides:
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getMinimumSize
in class
JComponent
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Returns:
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the value of the minimumSize property
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See Also:
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JComponent.setMinimumSize(java.awt.Dimension)
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ComponentUI
getMaximumSize
public Dimension getMaximumSize()
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The scrollbar is flexible along it's scrolling axis and rigid along the other axis.
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Overrides:
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getMaximumSize
in class
JComponent
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Returns:
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the value of the maximumSize property
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See Also:
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JComponent.setMaximumSize(java.awt.Dimension)
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ComponentUI
setEnabled
public void setEnabled(boolean x)
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Enables the component so that the knob position can be changed. When the disabled, the knob position cannot be changed.
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Overrides:
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setEnabled
in class
JComponent
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Parameters:
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x - a boolean value, where true enables the component and false disables it
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See Also:
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Component.isEnabled()
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Component.isLightweight()
paramString
protected String paramString()
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Returns a string representation of this JScrollBar. 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.
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Overrides:
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paramString
in class
JComponent
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Returns:
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a string representation of this JScrollBar.
getAccessibleContext
public AccessibleContext getAccessibleContext()
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Gets the AccessibleContext associated with this JScrollBar. For JScrollBar, the AccessibleContext takes the form of an AccessibleJScrollBar. A new AccessibleJScrollBar instance is created if necessary.
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Specified by:
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getAccessibleContext
in interface
Accessible
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Overrides:
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getAccessibleContext
in class
JComponent
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Returns:
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an AccessibleJScrollBar that serves as the AccessibleContext of this JScrollBar