Class JScrollPane.ScrollBar

• java.lang.Object
• • java.awt.Component
  • • java.awt.Container
    • • javax.swing.JComponent
      • • javax.swing.JScrollBar
        • • javax.swing.JScrollPane.ScrollBar

All Implemented Interfaces:

Adjustable, ImageObserver, MenuContainer, Serializable, Accessible, UIResource

Enclosing class:

JScrollPane

protected class JScrollPane.ScrollBar
extends JScrollBar
implements UIResource

See Also:

Scrollable, JScrollPane.createVerticalScrollBar(), JScrollPane.createHorizontalScrollBar()

Nested Classes

Nested classes/interfaces inherited from class javax.swing.JScrollBar

JScrollBar.AccessibleJScrollBar

Nested classes/interfaces inherited from class javax.swing.JComponent

JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Fields

Fields inherited from class javax.swing.JScrollBar

blockIncrement, model, orientation, unitIncrement

Fields inherited from class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

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

Constructors

ScrollBar

public ScrollBar(int orientation)

Creates a scrollbar with the specified orientation. The options are:

• ScrollPaneConstants.VERTICAL
• ScrollPaneConstants.HORIZONTAL

Parameters:

orientation - an integer specifying one of the legal orientation values shown above

Since:

1.4

Methods

setUnitIncrement

public void setUnitIncrement(int unitIncrement)

Messages super to set the value, and resets the unitIncrementSet instance variable to true.

Specified by:

setUnitIncrement in interface Adjustable

Overrides:

setUnitIncrement in class JScrollBar

Parameters:

unitIncrement - the new unit increment value, in pixels

See Also:

JScrollBar.getUnitIncrement(int)

getUnitIncrement

public int getUnitIncrement(int direction)

Computes the unit increment for scrolling if the viewport's view is a Scrollable object. Otherwise return super.getUnitIncrement.

Overrides:

getUnitIncrement in class JScrollBar

Parameters:

direction - less than zero to scroll up/left, greater than zero for down/right

Returns:

an integer, in pixels, containing the unit increment

See Also:

Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)

setBlockIncrement

public void setBlockIncrement(int blockIncrement)

Messages super to set the value, and resets the blockIncrementSet instance variable to true.

Specified by:

setBlockIncrement in interface Adjustable

Overrides:

setBlockIncrement in class JScrollBar

Parameters:

blockIncrement - the new block increment value, in pixels

See Also:

JScrollBar.getBlockIncrement()

getBlockIncrement

public int getBlockIncrement(int direction)

Computes the block increment for scrolling if the viewport's view is a Scrollable object. Otherwise the blockIncrement equals the viewport's width or height. If there's no viewport return super.getBlockIncrement.

Overrides:

getBlockIncrement in class JScrollBar

Parameters:

direction - less than zero to scroll up/left, greater than zero for down/right

Returns:

an integer, in pixels, containing the block increment

See Also:

Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)