BasicScrollBarUI JDK 1.6)

Methods

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public void addLayoutComponent (String name, Component child) [Specified in LayoutManager]

protected void configureScrollBarColors ()

public boolean contains (JComponent c, int x, int y) [Inherited From ComponentUI]

Returns true if the specified x,y location is contained within the look and feel's defined shape of the specified component.

Returns true if the specified x,y location is
contained within the look and feel's defined shape of the specified
component. x and y are defined to be relative
to the coordinate system of the specified component. Although
a component's bounds is constrained to a rectangle,
this method provides the means for defining a non-rectangular
shape within those bounds for the purpose of hit detection.
Parameters:
- c - the component where the x,y location is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
- x - the x coordinate of the point
- y - the y coordinate of the point
See Also: JComponent.contains(int, int), Component.contains(int, int),

protected ArrowButtonListener createArrowButtonListener ()

protected JButton createDecreaseButton (int orientation)

protected JButton createIncreaseButton (int orientation)

protected ModelListener createModelListener ()

protected PropertyChangeListener createPropertyChangeListener ()

protected ScrollListener createScrollListener ()

protected TrackListener createTrackListener ()

publicstatic ComponentUI createUI (JComponent c) [Overrides ComponentUI]

public Accessible getAccessibleChild (JComponent c, int i) [Inherited From ComponentUI]

Returns the ith Accessible child of the object.

Returns the ith Accessible child of the object. UIs might need to override this if they present areas on the screen that can be viewed as components, but actual components are not used for presenting those areas.

Note: As of v1.3, it is recommended that developers call Component.AccessibleAWTComponent.getAccessibleChild() instead of this method.
Returns: the ith Accessible child of the object
Parameters:
- i - zero-based index of child
See Also: ComponentUI.getAccessibleChildrenCount(javax.swing.JComponent),

public int getAccessibleChildrenCount (JComponent c) [Inherited From ComponentUI]

Returns the number of accessible children in the object.

Returns the number of accessible children in the object. If all
of the children of this object implement Accessible,
this
method should return the number of children of this object.
UIs might wish to override this if they present areas on the
screen that can be viewed as components, but actual components
are not used for presenting those areas.

Note: As of v1.3, it is recommended that developers call
Component.AccessibleAWTComponent.getAccessibleChildrenCount() instead
of this method.
Returns: the number of accessible children in the object
See Also: ComponentUI.getAccessibleChild(javax.swing.JComponent, int),

public int getBaseline (JComponent c, int width, int height) [Inherited From ComponentUI]

Returns the baseline.

Returns the baseline. The baseline is measured from the top of the component. This method is primarily meant for LayoutManagers to align components along their baseline. A return value less than 0 indicates this component does not have a reasonable baseline and that LayoutManagers should not align this component on its baseline.

This method returns -1. Subclasses that have a meaningful baseline should override appropriately.
Returns: baseline or a value < 0 indicating there is no reasonable baseline
Parameters:
- c - JComponent baseline is being requested for
- width - the width to get the baseline for
- height - the height to get the baseline for
Throws:
- NullPointerException - if c is null
- IllegalArgumentException - if width or height is < 0
Since: 1.6
See Also: JComponent.getBaseline(int,int),

public BaselineResizeBehavior getBaselineResizeBehavior (JComponent c) [Inherited From ComponentUI]

Returns an enum indicating how the baseline of he component changes as the size changes.

public Dimension getMaximumSize (JComponent c) [Overrides ComponentUI]

protected Dimension getMaximumThumbSize ()

Return the largest acceptable size for the thumb.

Return the largest acceptable size for the thumb. To create a fixed size thumb one make this method and getMinimumThumbSize return the same value.

Warning : the value returned by this method should not be be modified, it's a shared static constant.
Returns: The largest acceptable size for the thumb.
See Also: BasicScrollBarUI.getMinimumThumbSize(),

public Dimension getMinimumSize (JComponent c) [Inherited From ComponentUI]

Returns the specified component's minimum size appropriate for the look and feel.

Returns the specified component's minimum size appropriate for
the look and feel. If null is returned, the minimum
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.
Returns: a Dimension object or null
Parameters:
- c - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
See Also: JComponent.getMinimumSize(), LayoutManager.minimumLayoutSize(java.awt.Container), ComponentUI.getPreferredSize(javax.swing.JComponent),

protected Dimension getMinimumThumbSize ()

Return the smallest acceptable size for the thumb.

public Dimension getPreferredSize (JComponent c) [Overrides ComponentUI]

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.

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. 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.
Returns: the preferred size of a Basic JScrollBar
Parameters:
- c - the JScrollBar that's delegating this method to us
See Also: BasicScrollBarUI.getMaximumSize(javax.swing.JComponent), ComponentUI.getMinimumSize(javax.swing.JComponent),

public boolean getSupportsAbsolutePositioning ()

Indicates whether the user can absolutely position the thumb with a mouse gesture (usually the middle mouse button).

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 ()

protected void installListeners ()

public void installUI (JComponent c) [Overrides ComponentUI]

public boolean isThumbRollover ()

Returns true if the mouse is currently over the thumb.

public void layoutContainer (Container scrollbarContainer) [Specified in LayoutManager]

protected void layoutHScrollbar (JScrollBar sb)

protected void layoutVScrollbar (JScrollBar sb)

pack-privatestatic void loadActionMap (LazyActionMap map)

public Dimension minimumLayoutSize (Container scrollbarContainer) [Specified in LayoutManager]

public void paint (Graphics g, JComponent c) [Overrides ComponentUI]

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)

public Dimension preferredLayoutSize (Container scrollbarContainer) [Specified in LayoutManager]

public void removeLayoutComponent (Component child) [Specified in LayoutManager]

protected void scrollByBlock (int direction)

pack-privatestatic void scrollByBlock (JScrollBar scrollbar, int direction)

protected void scrollByUnit (int direction)

pack-privatestatic void scrollByUnits (JScrollBar scrollbar, int direction, int units, boolean limitToBlock)

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 setThumbRollover (boolean active)

Sets whether or not the mouse is currently over the thumb.

protected void uninstallComponents ()

protected void uninstallDefaults ()

protected void uninstallKeyboardActions ()

protected void uninstallListeners ()

public void uninstallUI (JComponent c) [Overrides ComponentUI]

public void update (Graphics g, JComponent c) [Inherited From ComponentUI]

Notifies this UI delegate that it's time to paint the specified component.

Notifies this UI delegate that it's time to paint the specified
component. This method is invoked by JComponent
when the specified component is being painted.
By default this method will fill the specified component with
its background color (if its opaque property is
true) and then immediately call paint.
In general this method need not be overridden by subclasses;
all look-and-feel rendering code should reside in the paint
method.
Parameters:
- g - the Graphics context in which to paint
- c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
See Also: ComponentUI.paint(java.awt.Graphics, javax.swing.JComponent), JComponent.paintComponent(java.awt.Graphics),

Fields

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publicfinalstatic int BOTTOM = "3" [Inherited From SwingConstants]

Box-orientation constant used to specify the bottom of a box.

protected ArrowButtonListener buttonListener

publicfinalstatic int CENTER = "0" [Inherited From SwingConstants]

The central position in an area.

protected JButton decrButton

protectedfinalstatic int DECREASE_HIGHLIGHT = "1"

publicfinalstatic int EAST = "3" [Inherited From SwingConstants]

Compass-direction east (right).

publicfinalstatic int HORIZONTAL = "0" [Inherited From SwingConstants]

Horizontal orientation.

protected JButton incrButton

protectedfinalstatic int INCREASE_HIGHLIGHT = "2"

protected boolean isDragging

publicfinalstatic int LEADING = "10" [Inherited From SwingConstants]

Identifies the leading edge of text for use with left-to-right and right-to-left languages.

publicfinalstatic int LEFT = "2" [Inherited From SwingConstants]

Box-orientation constant used to specify the left side of a box.

protected Dimension maximumThumbSize

protected Dimension minimumThumbSize

protected ModelListener modelListener

publicfinalstatic int NEXT = "12" [Inherited From SwingConstants]

Identifies the next direction in a sequence.

protectedfinalstatic int NO_HIGHLIGHT = "0"

publicfinalstatic int NORTH = "1" [Inherited From SwingConstants]

Compass-direction North (up).

publicfinalstatic int NORTH_EAST = "2" [Inherited From SwingConstants]

Compass-direction north-east (upper right).

publicfinalstatic int NORTH_WEST = "8" [Inherited From SwingConstants]

Compass-direction north west (upper left).

publicfinalstatic int PREVIOUS = "13" [Inherited From SwingConstants]

Identifies the previous direction in a sequence.

protected PropertyChangeListener propertyChangeListener

publicfinalstatic int RIGHT = "4" [Inherited From SwingConstants]

Box-orientation constant used to specify the right side of a box.

protected JScrollBar scrollbar

protected ScrollListener scrollListener

protected Timer scrollTimer

publicfinalstatic int SOUTH = "5" [Inherited From SwingConstants]

Compass-direction south (down).

publicfinalstatic int SOUTH_EAST = "4" [Inherited From SwingConstants]

Compass-direction south-east (lower right).

publicfinalstatic int SOUTH_WEST = "6" [Inherited From SwingConstants]

Compass-direction south-west (lower left).

protected Color thumbColor

protected Color thumbDarkShadowColor

protected Color thumbHighlightColor

protected Color thumbLightShadowColor

protected Rectangle thumbRect

publicfinalstatic int TOP = "1" [Inherited From SwingConstants]

Box-orientation constant used to specify the top of a box.

protected Color trackColor

protected int trackHighlight

protected Color trackHighlightColor

protected TrackListener trackListener

protected Rectangle trackRect

publicfinalstatic int TRAILING = "11" [Inherited From SwingConstants]

Identifies the trailing edge of text for use with left-to-right and right-to-left languages.

publicfinalstatic int VERTICAL = "1" [Inherited From SwingConstants]

Vertical orientation.

publicfinalstatic int WEST = "7" [Inherited From SwingConstants]

Compass-direction west (left).