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.
public AbstractBorder()
public void paintBorder(Component c,
Graphics g,
int x,
int y,
int width,
int height) This default implementation does no painting.
paintBorder in interface Border
c - the component for which this border is being paintedg - the paint graphicsx - the x position of the painted bordery - the y position of the painted borderwidth - the width of the painted borderheight - the height of the painted borderpublic 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.
getBorderInsets in interface Border
c - the component for which this border insets value appliesInsets objectpublic Insets getBorderInsets(Component c,
Insets insets) Reinitializes the insets parameter with this Border's current Insets.
c - the component for which this border insets value appliesinsets - the object to be reinitializedinsets objectpublic boolean isBorderOpaque()
This default implementation returns false.
isBorderOpaque in interface Border
public Rectangle getInteriorRectangle(Component c,
int x,
int y,
int width,
int height) This convenience method calls the static method.
c - the component for which this border is being computedx - the x position of the bordery - the y position of the borderwidth - the width of the borderheight - the height of the borderRectangle containing the interior coordinatespublic 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.
c - the component for which this border is being computedb - the Border objectx - the x position of the bordery - the y position of the borderwidth - the width of the borderheight - the height of the borderRectangle containing the interior coordinatespublic 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.
c - Component baseline is being requested forwidth - the width to get the baseline forheight - the height to get the baseline forIllegalArgumentException - if width or height is < 0Component.getBaseline(int,int), Component.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.
c - Component to return baseline resize behavior forComponent.getBaseline(int,int), Component.getBaselineResizeBehavior()
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