javax.swing.plaf.basic

Class BasicScrollPaneUI

public class BasicScrollPaneUI extends ScrollPaneUI implements ScrollPaneConstants

A UI delegate for the {@link JScrollPane} component.

Nested Class Summary
class	BasicScrollPaneUI.HSBChangeListener Listens for changes in the state of the horizontal scrollbar's model and updates the scrollpane accordingly.
protected class	BasicScrollPaneUI.MouseWheelHandler Listens for mouse wheel events and update the scrollpane accordingly.
class	BasicScrollPaneUI.PropertyChangeHandler Listens for property changes on the scrollpane and update the view accordingly.
class	BasicScrollPaneUI.ViewportChangeHandler Listens for changes of the viewport's extent size and updates the scrollpane accordingly.
class	BasicScrollPaneUI.VSBChangeListener Listens for changes in the state of the vertical scrollbar's model and updates the scrollpane accordingly.

Field Summary
protected ChangeListener	hsbChangeListener The horizontal scrollbar listener.
protected JScrollPane	scrollpane The Scrollpane for which the UI is provided by this class.
protected PropertyChangeListener	spPropertyChangeListener The scrollpane property change listener.
protected ChangeListener	viewportChangeListener The viewport listener.
protected ChangeListener	vsbChangeListener The vertical scrollbar listener.

Method Summary
protected ChangeListener	createHSBChangeListener() Creates and returns the change listener for the horizontal scrollbar.
protected MouseWheelListener	createMouseWheelListener() Creates and returns the mouse wheel listener for the scrollpane.
protected PropertyChangeListener	createPropertyChangeListener() Creates and returns the property change listener for the scrollpane.
static ComponentUI	createUI(JComponent c)
protected ChangeListener	createViewportChangeListener() Creates and returns the change listener for the viewport.
protected ChangeListener	createVSBChangeListener() Creates and returns the change listener for the vertical scrollbar.
Dimension	getMinimumSize(JComponent c)
protected void	installDefaults(JScrollPane p)
protected void	installKeyboardActions(JScrollPane sp) Installs additional keyboard actions on the scrollpane.
protected void	installListeners(JScrollPane sp) Installs the listeners on the scrollbars, the viewport and the scrollpane.
void	installUI(JComponent c)
void	paint(Graphics g, JComponent c)
protected void	syncScrollPaneWithViewport() Synchronizes the scrollbar and header settings positions and extent with the viewport's view position and extent.
protected void	uninstallDefaults(JScrollPane p)
protected void	uninstallKeyboardActions(JScrollPane sp) Uninstalls all keyboard actions from the JScrollPane that have been installed by {@link #installKeyboardActions}.
protected void	uninstallListeners(JComponent c) Uninstalls all the listeners that have been installed in {@link #installListeners(JScrollPane)}.
void	uninstallUI(JComponent c)
protected void	updateColumnHeader(PropertyChangeEvent ev) Receives notification when the `columnHeader` property has changed on the scrollpane.
protected void	updateRowHeader(PropertyChangeEvent ev) Receives notification when the `rowHeader` property has changed on the scrollpane.
protected void	updateScrollBarDisplayPolicy(PropertyChangeEvent ev) Receives notification when the `scrollBarDisplayPolicy` property has changed on the scrollpane.
protected void	updateViewport(PropertyChangeEvent ev) Receives notification when the `viewport` property has changed on the scrollpane.

Field Detail

hsbChangeListener

protected ChangeListener hsbChangeListener

The horizontal scrollbar listener.

scrollpane

protected JScrollPane scrollpane

The Scrollpane for which the UI is provided by this class.

spPropertyChangeListener

protected PropertyChangeListener spPropertyChangeListener

The scrollpane property change listener.

viewportChangeListener

protected ChangeListener viewportChangeListener

The viewport listener.

vsbChangeListener

protected ChangeListener vsbChangeListener

The vertical scrollbar listener.

Method Detail

createHSBChangeListener

protected ChangeListener createHSBChangeListener()

Creates and returns the change listener for the horizontal scrollbar.

Returns: the change listener for the horizontal scrollbar

createMouseWheelListener

protected MouseWheelListener createMouseWheelListener()

Creates and returns the mouse wheel listener for the scrollpane.

Returns: the mouse wheel listener for the scrollpane

Since: 1.4

createPropertyChangeListener

protected PropertyChangeListener createPropertyChangeListener()

Creates and returns the property change listener for the scrollpane.

Returns: the property change listener for the scrollpane

createUI

public static ComponentUI createUI(JComponent c)

createViewportChangeListener

protected ChangeListener createViewportChangeListener()

Creates and returns the change listener for the viewport.

Returns: the change listener for the viewport

createVSBChangeListener

protected ChangeListener createVSBChangeListener()

Creates and returns the change listener for the vertical scrollbar.

Returns: the change listener for the vertical scrollbar

getMinimumSize

public Dimension getMinimumSize(JComponent c)

installDefaults

protected void installDefaults(JScrollPane p)

installKeyboardActions

protected void installKeyboardActions(JScrollPane sp)

Installs additional keyboard actions on the scrollpane. This is a hook method provided to subclasses in order to install their own keyboard actions.

Parameters: sp the scrollpane to install keyboard actions on

installListeners

protected void installListeners(JScrollPane sp)

Installs the listeners on the scrollbars, the viewport and the scrollpane.

Parameters: sp the scrollpane on which to install the listeners

installUI

public void installUI(JComponent c)

paint

public void paint(Graphics g, JComponent c)

syncScrollPaneWithViewport

protected void syncScrollPaneWithViewport()

Synchronizes the scrollbar and header settings positions and extent with the viewport's view position and extent.

uninstallDefaults

protected void uninstallDefaults(JScrollPane p)

uninstallKeyboardActions

protected void uninstallKeyboardActions(JScrollPane sp)

Uninstalls all keyboard actions from the JScrollPane that have been installed by {@link #installKeyboardActions}. This is a hook method provided to subclasses to add their own keyboard actions.

Parameters: sp the scrollpane to uninstall keyboard actions from

uninstallListeners

protected void uninstallListeners(JComponent c)

Uninstalls all the listeners that have been installed in {@link #installListeners(JScrollPane)}.

Parameters: c the scrollpane from which to uninstall the listeners

uninstallUI

public void uninstallUI(JComponent c)

updateColumnHeader

protected void updateColumnHeader(PropertyChangeEvent ev)

Receives notification when the columnHeader property has changed on the scrollpane.

Parameters: ev the property change event

updateRowHeader

protected void updateRowHeader(PropertyChangeEvent ev)

Receives notification when the rowHeader property has changed on the scrollpane.

Parameters: ev the property change event

updateScrollBarDisplayPolicy

protected void updateScrollBarDisplayPolicy(PropertyChangeEvent ev)

Receives notification when the scrollBarDisplayPolicy property has changed on the scrollpane.

Parameters: ev the property change event

updateViewport

protected void updateViewport(PropertyChangeEvent ev)

Receives notification when the viewport property has changed on the scrollpane. This method sets removes the viewportChangeListener from the old viewport and adds it to the new viewport.

Parameters: ev the property change event