Java javax.swing.border Class AbstractBorder（JDK8）

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 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 interface Border

  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 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

• 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()