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javax.swing.plaf.basic
Class BasicBorders.MarginBorder  

java.lang.Object
  javax.swing.border.AbstractBorder
      javax.swing.plaf.basic.BasicBorders.MarginBorder

All Implemented Interfaces:

javax.swing.border.Border, java.io.Serializable, javax.swing.plaf.UIResource

Enclosing class:

BasicBorders

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public static class BasicBorders.MarginBorder

extends javax.swing.border.AbstractBorder

implements java.io.Serializable, javax.swing.plaf.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.

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Field Summary
(package private) static long	serialVersionUID           Determined using the serialver tool of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.

 

Constructor Summary

BasicBorders.MarginBorder()           Constructs a new MarginBorder.

 

Method Summary
java.awt.Insets	getBorderInsets(java.awt.Component c)           Measures the width of this border.
java.awt.Insets	getBorderInsets(java.awt.Component c, java.awt.Insets insets)           Determines the insets of this border by calling the getMargin() method of the enclosed component.

 

Methods inherited from class javax.swing.border.AbstractBorder

getInteriorRectangle, getInteriorRectangle, isBorderOpaque, paintBorder

 

Methods inherited from class java.lang.Object

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

 

Field Detail

serialVersionUID

static final long serialVersionUID

Determined using the serialver tool of Apple/Sun JDK 1.3.1 on MacOS X 10.1.5.

See Also:

Constant Field Values

Constructor Detail

BasicBorders.MarginBorder

public BasicBorders.MarginBorder()

Constructs a new MarginBorder.

Method Detail

getBorderInsets

public java.awt.Insets getBorderInsets(java.awt.Component c)

Measures the width of this border.

Specified by:

getBorderInsets in interface javax.swing.border.Border

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getBorderInsets

public java.awt.Insets getBorderInsets(java.awt.Component c,
                                       java.awt.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 javax.swing.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()>AbstractButton.getMargin() 55 , JPopupMenu.getMargin()>JPopupMenu.getMargin() 55 , JToolBar.getMargin()>JToolBar.getMargin() 55 , and javax.swing.text.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.

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