javax.swing.plaf.basic
Class BasicScrollPaneUI
- ScrollPaneConstants
COLUMN_HEADER, HORIZONTAL_SCROLLBAR, HORIZONTAL_SCROLLBAR_ALWAYS, HORIZONTAL_SCROLLBAR_AS_NEEDED, HORIZONTAL_SCROLLBAR_NEVER, HORIZONTAL_SCROLLBAR_POLICY, LOWER_LEADING_CORNER, LOWER_LEFT_CORNER, LOWER_RIGHT_CORNER, LOWER_TRAILING_CORNER, ROW_HEADER, UPPER_LEADING_CORNER, UPPER_LEFT_CORNER, UPPER_RIGHT_CORNER, UPPER_TRAILING_CORNER, VERTICAL_SCROLLBAR, VERTICAL_SCROLLBAR_ALWAYS, VERTICAL_SCROLLBAR_AS_NEEDED, VERTICAL_SCROLLBAR_NEVER, VERTICAL_SCROLLBAR_POLICY, VIEWPORT |
contains, createUI, getAccessibleChild, getAccessibleChildrenCount, getMaximumSize, getMinimumSize, getPreferredSize, installUI, paint, uninstallUI, update |
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
createHSBChangeListener
protected ChangeListener createHSBChangeListener()
Creates and returns the change listener for the horizontal scrollbar.
- the change listener for the horizontal scrollbar
createUI
public static ComponentUI createUI(JComponent c)
Creates a delegate object for the specified component. Users
should use the createUI method of a suitable
subclass. The implementation of ComponentUI
always throws an error.
- createUI in interface ComponentUI
c - the component for which a UI delegate is requested.
createVSBChangeListener
protected ChangeListener createVSBChangeListener()
Creates and returns the change listener for the vertical scrollbar.
- the change listener for the vertical scrollbar
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.
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.
sp - the scrollpane on which to install the listeners
installUI
public void installUI(JComponent c)
Sets up the specified component so it conforms the the design
guidelines of the implemented look and feel. When the look and
feel changes, a
ComponentUI delegate is created.
The delegate object then receives an
installUI
message.
This method should perform the following tasks:
- Set visual properties such as borders, fonts, colors, or
icons. However, no change should be performed for those
properties whose values have been directly set by the client
application. To allow the distinction, LookAndFeels are expected
to use values that implement the
UIResource marker
interface, such as BorderUIResource or ColorUIResource. - If necessary, install a
LayoutManager. - Embed custom sub-components. For instance, the UI delegate
for a
JSplitPane might install a special
component for the divider. - Register event listeners.
- Set up properties related to keyborad navigation, such as
mnemonics or focus traversal policies.
- installUI in interface ComponentUI
c - the component for which this delegate will provide
services.
paint
public void paint(Graphics g,
JComponent c) Paints the component according to the design guidelines
of the look and feel. Most subclasses will want to override
this method.
- paint in interface ComponentUI
g - the graphics for painting.c - the component for which this delegate performs
services.
syncScrollPaneWithViewport
protected void syncScrollPaneWithViewport()
Synchronizes the scrollbar and header settings positions and extent
with the viewport's view position and extent.
updateColumnHeader
protected void updateColumnHeader(PropertyChangeEvent ev)
Receives notification when the columnHeader property has
changed on the scrollpane.
ev - the property change event
updateRowHeader
protected void updateRowHeader(PropertyChangeEvent ev)
Receives notification when the rowHeader property has changed
on the scrollpane.
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.
ev - the property change event
BasicScrollPaneUI.java
Copyright (C) 2002, 2004, 2005, 2006, Free Software Foundation, Inc.
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