javax.swing.border
Class AbstractBorder

java.lang.Object
  |
  +--javax.swing.border.AbstractBorder

All Implemented Interfaces:

Border, Serializable

Direct Known Subclasses:

BasicBorders.ButtonBorder, BasicBorders.FieldBorder, BasicBorders.MarginBorder, BasicBorders.MenuBarBorder, BevelBorder, CompoundBorder, EmptyBorder, EtchedBorder, LineBorder, MetalBorders.ButtonBorder, MetalBorders.Flush3DBorder, MetalBorders.InternalFrameBorder, MetalBorders.MenuBarBorder, MetalBorders.MenuItemBorder, MetalBorders.OptionDialogBorder, MetalBorders.PaletteBorder, MetalBorders.PopupMenuBorder, MetalBorders.ScrollPaneBorder, MetalBorders.TableHeaderBorder, MetalBorders.ToolBarBorder, TitledBorder

public abstract class AbstractBorder

extends Object

implements Border, Serializable

A class that implements an empty border with no size. This provides a convenient base class from which other border classes can be easily derived.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see XMLEncoder.

Constructor Summary

AbstractBorder()

Method Summary

Insets	getBorderInsets(Component c) This default implementation returns a new Insets instance where the top, left, bottom, and right fields are set to 0.
Insets	getBorderInsets(Component c, Insets insets) Reinitializes the insets parameter with this Border's current Insets.
static Rectangle	getInteriorRectangle(Component c, Border b, int x, int y, int width, int height) Returns a rectangle using the arguments minus the insets of the border.
Rectangle	getInteriorRectangle(Component c, int x, int y, int width, int height) This convenience method calls the static method.
boolean	isBorderOpaque() This default implementation returns false.
void	paintBorder(Component c, Graphics g, int x, int y, int width, int height) This default implementation does no painting.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractBorder

public AbstractBorder()

Method Detail

paintBorder

public void paintBorder(Component c,
                        Graphics g,
                        int x,
                        int y,
                        int width,
                        int height)

This default implementation does no painting.

Specified by:

paintBorder in interface Border

Parameters:

c - the component for which this border is being painted

g - the paint graphics

x - the x position of the painted border

y - the y position of the painted border

width - the width of the painted border

height - the height of the painted border

getBorderInsets

public Insets getBorderInsets(Component c)

This default implementation returns a new Insets instance where the top, left, bottom, and right fields are set to 0.

Specified by:

getBorderInsets in interface Border

Parameters:

c - the component for which this border insets value applies

Returns:

the new Insets object initialized to 0

getBorderInsets

public Insets getBorderInsets(Component c,
                              Insets insets)

Reinitializes the insets parameter with this Border's current Insets.

Parameters:

c - the component for which this border insets value applies

insets - the object to be reinitialized

Returns:

the insets object

isBorderOpaque

public boolean isBorderOpaque()

This default implementation returns false.

Specified by:

isBorderOpaque in interface Border

Returns:

false

getInteriorRectangle

public Rectangle getInteriorRectangle(Component c,
                                      int x,
                                      int y,
                                      int width,
                                      int height)

This convenience method calls the static method.

Parameters:

c - the component for which this border is being computed

x - the x position of the border

y - the y position of the border

width - the width of the border

height - the height of the border

Returns:

a Rectangle containing the interior coordinates

getInteriorRectangle

public static Rectangle getInteriorRectangle(Component c,
                                             Border b,
                                             int x,
                                             int y,
                                             int width,
                                             int height)

Returns a rectangle using the arguments minus the insets of the border. This is useful for determining the area that components should draw in that will not intersect the border.

Parameters:

c - the component for which this border is being computed

b - the Border object

x - the x position of the border

y - the y position of the border

width - the width of the border

height - the height of the border

Returns:

a Rectangle containing the interior coordinates