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JavaTM 2 Platform Std. Ed. v1.4.2 |
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java.lang.Objectjavax.swing.plaf.ComponentUI
javax.swing.plaf.ScrollBarUI
javax.swing.plaf.basic.BasicScrollBarUI
Implementation of ScrollBarUI for the Basic Look and Feel
| Nested Class Summary | |
protected class |
BasicScrollBarUI.ArrowButtonListener
Listener for cursor keys. |
protected class |
BasicScrollBarUI.ModelListener
A listener to listen for model changes. |
class |
BasicScrollBarUI.PropertyChangeHandler
|
protected class |
BasicScrollBarUI.ScrollListener
Listener for scrolling events initiated in the ScrollPane. |
protected class |
BasicScrollBarUI.TrackListener
Track mouse drags. |
| Field Summary | |
protected BasicScrollBarUI.ArrowButtonListener |
buttonListener
|
protected JButton |
decrButton
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protected static int |
DECREASE_HIGHLIGHT
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protected JButton |
incrButton
|
protected static int |
INCREASE_HIGHLIGHT
|
protected boolean |
isDragging
|
protected Dimension |
maximumThumbSize
|
protected Dimension |
minimumThumbSize
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protected BasicScrollBarUI.ModelListener |
modelListener
|
protected static int |
NO_HIGHLIGHT
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protected PropertyChangeListener |
propertyChangeListener
|
protected JScrollBar |
scrollbar
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protected BasicScrollBarUI.ScrollListener |
scrollListener
|
protected Timer |
scrollTimer
|
protected Color |
thumbColor
|
protected Color |
thumbDarkShadowColor
|
protected Color |
thumbHighlightColor
|
protected Color |
thumbLightShadowColor
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protected Rectangle |
thumbRect
|
protected Color |
trackColor
|
protected int |
trackHighlight
|
protected Color |
trackHighlightColor
|
protected BasicScrollBarUI.TrackListener |
trackListener
|
protected Rectangle |
trackRect
|
| 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 |
| Constructor Summary | |
BasicScrollBarUI()
|
|
| Method Summary | |
void |
addLayoutComponent(String name,
Component child)
If the layout manager uses a per-component string, adds the component comp to the layout,
associating it
with the string specified by name. |
protected void |
configureScrollBarColors()
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protected BasicScrollBarUI.ArrowButtonListener |
createArrowButtonListener()
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protected JButton |
createDecreaseButton(int orientation)
|
protected JButton |
createIncreaseButton(int orientation)
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protected BasicScrollBarUI.ModelListener |
createModelListener()
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protected PropertyChangeListener |
createPropertyChangeListener()
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protected BasicScrollBarUI.ScrollListener |
createScrollListener()
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protected BasicScrollBarUI.TrackListener |
createTrackListener()
|
static ComponentUI |
createUI(JComponent c)
Returns an instance of the UI delegate for the specified component. |
Dimension |
getMaximumSize(JComponent c)
Returns the specified component's maximum size appropriate for the look and feel. |
protected Dimension |
getMaximumThumbSize()
Return the largest acceptable size for the thumb. |
Dimension |
getMinimumSize(JComponent c)
A vertical scrollbar's minimum width is the largest minimum width of the (non null) increment/decrement buttons,
and the minimum width of the thumb. |
protected Dimension |
getMinimumThumbSize()
Return the smallest acceptable size for the thumb. |
Dimension |
getPreferredSize(JComponent c)
A vertical scrollbar's preferred width is the maximum of preferred widths of the (non null)
increment/decrement buttons,
and the minimum width of the thumb. |
protected Rectangle |
getThumbBounds()
Return the current size/location of the thumb. |
protected Rectangle |
getTrackBounds()
Returns the current bounds of the track, i.e. |
protected void |
installComponents()
|
protected void |
installDefaults()
|
protected void |
installKeyboardActions()
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protected void |
installListeners()
|
void |
installUI(JComponent c)
Configures the specified component appropriate for the look and feel. |
void |
layoutContainer(Container scrollbarContainer)
Lays out the specified container. |
protected void |
layoutHScrollbar(JScrollBar sb)
|
protected void |
layoutVScrollbar(JScrollBar sb)
|
Dimension |
minimumLayoutSize(Container scrollbarContainer)
Calculates the minimum size dimensions for the specified container, given the components it contains. |
void |
paint(Graphics g,
JComponent c)
Paints the specified component appropriate for the look and feel. |
protected void |
paintDecreaseHighlight(Graphics g)
|
protected void |
paintIncreaseHighlight(Graphics g)
|
protected void |
paintThumb(Graphics g,
JComponent c,
Rectangle thumbBounds)
|
protected void |
paintTrack(Graphics g,
JComponent c,
Rectangle trackBounds)
|
Dimension |
preferredLayoutSize(Container scrollbarContainer)
Calculates the preferred size dimensions for the specified container, given the components it contains. |
void |
removeLayoutComponent(Component child)
Removes the specified component from the layout. |
protected void |
scrollByBlock(int direction)
|
protected void |
scrollByUnit(int direction)
|
protected void |
setThumbBounds(int x,
int y,
int width,
int height)
Set the bounds of the thumb and force a repaint that includes the old thumbBounds and the new one. |
protected void |
uninstallComponents()
|
protected void |
uninstallDefaults()
|
protected void |
uninstallKeyboardActions()
|
protected void |
uninstallListeners()
|
void |
uninstallUI(JComponent c)
Reverses configuration which was done on the specified component during installUI. |
| Methods inherited from class javax.swing.plaf.ComponentUI |
contains, getAccessibleChild, getAccessibleChildrenCount, update |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
protected Dimension minimumThumbSize
protected Dimension maximumThumbSize
protected Color thumbHighlightColor
protected Color thumbLightShadowColor
protected Color thumbDarkShadowColor
protected Color thumbColor
protected Color trackColor
protected Color trackHighlightColor
protected JScrollBar scrollbar
protected JButton incrButton
protected JButton decrButton
protected boolean isDragging
protected BasicScrollBarUI.TrackListener trackListener
protected BasicScrollBarUI.ArrowButtonListener buttonListener
protected BasicScrollBarUI.ModelListener modelListener
protected Rectangle thumbRect
protected Rectangle trackRect
protected int trackHighlight
protected static final int NO_HIGHLIGHT
protected static final int DECREASE_HIGHLIGHT
protected static final int INCREASE_HIGHLIGHT
protected BasicScrollBarUI.ScrollListener scrollListener
protected PropertyChangeListener propertyChangeListener
protected Timer scrollTimer
| Constructor Detail |
public BasicScrollBarUI()
| Method Detail |
public static ComponentUI createUI(JComponent c)
ComponentUIcreateUI
method that returns an instance of that UI delegate subclass.
If the UI delegate subclass is stateless, it may return an instance
that is shared by multiple components. If the UI delegate is
stateful, then it should return a new instance per component.
The default implementation of this method throws an error, as it
should never be invoked.
protected void configureScrollBarColors()
public void installUI(JComponent c)
ComponentUIComponentUI instance is being installed
as the UI delegate on the specified component. This method should
completely configure the component for the look and feel,
including the following:
LayoutManager on the component if necessary.
PropertyChangeListener on the component in order
to detect and respond to component property changes appropriately.
installUI in class ComponentUIc - the component where this UI delegate is being installedComponentUI.uninstallUI(javax.swing.JComponent),
JComponent.setUI(javax.swing.plaf.ComponentUI),
JComponent.updateUI()public void uninstallUI(JComponent c)
ComponentUIinstallUI. This method is invoked when this
UIComponent instance is being removed as the UI delegate
for the specified component. This method should undo the
configuration performed in installUI, being careful to
leave the JComponent instance in a clean state (no
extraneous listeners, look-and-feel-specific property objects, etc.).
This should include the following:
uninstallUI in class ComponentUIc - the component from which this UI delegate is being removed;
this argument is often ignored,
but might be used if the UI object is stateless
and shared by multiple componentsComponentUI.installUI(javax.swing.JComponent),
JComponent.updateUI()protected void installDefaults()
protected void installComponents()
protected void uninstallComponents()
protected void installListeners()
protected void installKeyboardActions()
protected void uninstallKeyboardActions()
protected void uninstallListeners()
protected void uninstallDefaults()
protected BasicScrollBarUI.TrackListener createTrackListener()
protected BasicScrollBarUI.ArrowButtonListener createArrowButtonListener()
protected BasicScrollBarUI.ModelListener createModelListener()
protected BasicScrollBarUI.ScrollListener createScrollListener()
protected PropertyChangeListener createPropertyChangeListener()
public void paint(Graphics g,
JComponent c)
ComponentUIComponentUI.update method when
the specified component is being painted. Subclasses should override
this method and use the specified Graphics object to
render the content of the component.
paint in class ComponentUIg - the Graphics context in which to paintc - the component being painted;
this argument is often ignored,
but might be used if the UI object is stateless
and shared by multiple componentsComponentUI.update(java.awt.Graphics, javax.swing.JComponent)public Dimension getPreferredSize(JComponent c)
null)
increment/decrement buttons,
and the minimum width of the thumb. The preferred height is the
sum of the preferred heights of the same parts. The basis for
the preferred size of a horizontal scrollbar is similar.
The preferredSize is only computed once, subsequent
calls to this method just return a cached size.
getPreferredSize in class ComponentUIc - the JScrollBar that's delegating this method to us
getMaximumSize(javax.swing.JComponent),
getMinimumSize(javax.swing.JComponent)public Dimension getMinimumSize(JComponent c)
null) increment/decrement buttons,
and the minimum width of the thumb. The minimum height is the
sum of the minimum heights of the same parts. The basis for
the preferred size of a horizontal scrollbar is similar.
The minimumSize is only computed once, subsequent
calls to this method just return a cached size.
getMinimumSize in class ComponentUIc - the JScrollBar that's delegating this method to us
JScrollBargetMaximumSize(javax.swing.JComponent),
getPreferredSize(javax.swing.JComponent)public Dimension getMaximumSize(JComponent c)
ComponentUInull is returned, the maximum
size will be calculated by the component's layout manager instead
(this is the preferred approach for any component with a specific
layout manager installed). The default implementation of this
method invokes getPreferredSize and returns that value.
getMaximumSize in class ComponentUIc - The JScrollBar that's delegating this method to us.
getMinimumSize(javax.swing.JComponent),
getPreferredSize(javax.swing.JComponent)protected JButton createDecreaseButton(int orientation)
protected JButton createIncreaseButton(int orientation)
protected void paintDecreaseHighlight(Graphics g)
protected void paintIncreaseHighlight(Graphics g)
protected void paintTrack(Graphics g,
JComponent c,
Rectangle trackBounds)
protected void paintThumb(Graphics g,
JComponent c,
Rectangle thumbBounds)
protected Dimension getMinimumThumbSize()
Warning : the value returned by this method should not be be modified, it's a shared static constant.
getMaximumThumbSize()protected Dimension getMaximumThumbSize()
getMinimumThumbSize
return the same value.
Warning : the value returned by this method should not be be modified, it's a shared static constant.
getMinimumThumbSize()
public void addLayoutComponent(String name,
Component child)
LayoutManagercomp to the layout,
associating it
with the string specified by name.
addLayoutComponent in interface LayoutManagername - the string to be associated with the componentchild - the component to be addedpublic void removeLayoutComponent(Component child)
LayoutManager
removeLayoutComponent in interface LayoutManagerchild - the component to be removedpublic Dimension preferredLayoutSize(Container scrollbarContainer)
LayoutManager
preferredLayoutSize in interface LayoutManagerscrollbarContainer - the container to be laid outLayoutManager.minimumLayoutSize(java.awt.Container)public Dimension minimumLayoutSize(Container scrollbarContainer)
LayoutManager
minimumLayoutSize in interface LayoutManagerscrollbarContainer - the component to be laid outLayoutManager.preferredLayoutSize(java.awt.Container)protected void layoutVScrollbar(JScrollBar sb)
protected void layoutHScrollbar(JScrollBar sb)
public void layoutContainer(Container scrollbarContainer)
LayoutManager
layoutContainer in interface LayoutManagerscrollbarContainer - the container to be laid out
protected void setThumbBounds(int x,
int y,
int width,
int height)
getThumbBounds()protected Rectangle getThumbBounds()
Warning : the value returned by this method should not be be modified, it's a reference to the actual rectangle, not a copy.
setThumbBounds(int, int, int, int)protected Rectangle getTrackBounds()
Warning : the value returned by this method should not be be modified, it's a reference to the actual rectangle, not a copy.
layoutContainer(java.awt.Container)protected void scrollByBlock(int direction)
protected void scrollByUnit(int direction)
|
JavaTM 2 Platform Std. Ed. v1.4.2 |
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Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.