javax.swing.plaf.basic
Class BasicBorders.MarginBorder
- BasicBorders
- Border, Serializable, UIResource
An invisible, but spacing border whose margin is determined
by calling the
getMargin() method of the enclosed
component. If the enclosed component has no such method,
this border will not occupy any space.
![[An illustration that shows how MarginBorder
determines its borders]](doc-files/BasicBorders.MarginBorder-1.png)
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
MarginBorder
public MarginBorder()
Constructs a new MarginBorder.
getBorderInsets
public Insets getBorderInsets(Component c,
Insets insets) Determines the insets of this border by calling the
getMargin() method of the enclosed component. The
resulting margin will be stored into the the
left,
right,
top and
bottom
fields of the passed
insets parameter.
Unfortunately,
getMargin() is not a method of
JComponent or some other common superclass
of things with margins. While reflection could be used to
determine the existence of this method, this would be slow on
many virtual machines. Therefore, the current implementation
knows about
AbstractButton.getMargin(),
JPopupMenu.getMargin(),
JToolBar.getMargin(), and
JTextComponent. If
c is an
instance of a known class, the respective
getMargin() method is called to determine the
correct margin. Otherwise, a zero-width margin is returned.
- getBorderInsets in interface AbstractBorder
c - the component whose border is to be measured.
- the same object that was passed for
insets,
but with changed fields.
BasicBorders.java --
Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
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