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)
javax.swing.plaf.basic
public static class BasicBorders.MarginBorder extends AbstractBorder implements Serializable, UIResource
getMargin() method of the enclosed
component. If the enclosed component has no such method,
this border will not occupy any space.
| Constructor Summary | |
|---|---|
| MarginBorder()
Constructs a new MarginBorder. | |
| Method Summary | |
|---|---|
| Insets | getBorderInsets(Component c)
Measures the width of this border.
|
| Insets | getBorderInsets(Component c, Insets insets)
Determines the insets of this border by calling the
getMargin() method of the enclosed component. |
Parameters: c the component whose border is to be measured.
Returns: an Insets object whose left, right,
top and bottom fields indicate the
width of the border at the respective edge.
See Also: MarginBorder
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
{@link 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 {@link javax.swing.AbstractButton#getMargin()},
{@link javax.swing.JPopupMenu#getMargin()}, {@link
javax.swing.JToolBar#getMargin()}, and {@link
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.
Parameters: c the component whose border is to be measured.
Returns: the same object that was passed for insets,
but with changed fields.