AbstractBorder
Class AbstractBorder
- java.lang.Object
-
- javax.swing.border.AbstractBorder
- All Implemented Interfaces:
- Serializable, Border
- 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, StrokeBorder, 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™ has been added to the java.beans
package. Please see XMLEncoder
.
Constructors
AbstractBorder
public AbstractBorder()
Methods
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 interfaceBorder
- 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
object that is initialized by the getBorderInsets(Component,Insets)
method. By default the top
, left
, bottom
, and right
fields are set to 0
.
- Specified by:
-
getBorderInsets
in interfaceBorder
- Parameters:
-
c
- the component for which this border insets value applies - Returns:
- a new
Insets
object
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 interfaceBorder
- 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
- theBorder
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
getBaseline
public int getBaseline(Component c, int width, int height)
Returns the baseline. A return value less than 0 indicates the border does not have a reasonable baseline.
The default implementation returns -1. Subclasses that support baseline should override appropriately. If a value >= 0 is returned, then the component has a valid baseline for any size >= the minimum size and getBaselineResizeBehavior
can be used to determine how the baseline changes with size.
- Parameters:
-
c
-Component
baseline is being requested for -
width
- the width to get the baseline for -
height
- the height to get the baseline for - Returns:
- the baseline or < 0 indicating there is no reasonable baseline
- Throws:
-
IllegalArgumentException
- if width or height is < 0 - Since:
- 1.6
- See Also:
-
Component.getBaseline(int,int)
,Component.getBaselineResizeBehavior()
getBaselineResizeBehavior
public Component.BaselineResizeBehavior getBaselineResizeBehavior(Component c)
Returns an enum indicating how the baseline of a component changes as the size changes. This method is primarily meant for layout managers and GUI builders.
The default implementation returns BaselineResizeBehavior.OTHER
, subclasses that support baseline should override appropriately. Subclasses should never return null
; if the baseline can not be calculated return BaselineResizeBehavior.OTHER
. Callers should first ask for the baseline using getBaseline
and if a value >= 0 is returned use this method. It is acceptable for this method to return a value other than BaselineResizeBehavior.OTHER
even if getBaseline
returns a value less than 0.
- Parameters:
-
c
-Component
to return baseline resize behavior for - Returns:
- an enum indicating how the baseline changes as the border is resized
- Since:
- 1.6
- See Also:
-
Component.getBaseline(int,int)
,Component.getBaselineResizeBehavior()
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