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Java Platform 1.2 Beta 4 |
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SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object | +--java.awt.Component | +--java.awt.Container | +--com.sun.java.swing.Box
The Box class can create several kinds
of invisible components
that affect layout:
glue, struts, and rigid areas.
If all the components your Box contains
have a fixed size,
you might want to use a glue component
(returned by createGlue
)
to control the components' positions.
If you need a fixed amount of space between two components,
try using a strut
(createHorizontalStrut
or createVerticalStrut
).
If you need an invisible component
that always takes up the same amount of space,
get it by invoking createRigidArea
.
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 Swing1.0 applications. It will not be possible to load serialized Swing1.0 objects with future releases of Swing. The JDK1.2 release of Swing will be the compatibility baseline for the serialized form of Swing objects.
BoxLayout
, Serialized FormInner Class Summary | |
protected | Box.AccessibleBox
|
static | Box.Filler
An implementation of a lightweight component that participates in layout but has no view. |
Field Summary | |
protected AccessibleContext | accessibleContext
The currently set AccessibleContext object. |
Fields inherited from class java.awt.Component | |
BOTTOM_ALIGNMENT , CENTER_ALIGNMENT , LEFT_ALIGNMENT , RIGHT_ALIGNMENT , TOP_ALIGNMENT |
Constructor Summary | |
Box(int axis)
Creates a Box that displays its components
along the the specified axis. |
Method Summary | |
static Component | createGlue()
Creates an invisible "glue" component that can be useful in a Box whose visible components have a maximum width (for a horizontal box) or height (for a vertical box). |
static Box | createHorizontalBox()
Creates a Box that displays its components
from left to right. |
static Component | createHorizontalGlue()
Creates a horizontal glue component. |
static Component | createHorizontalStrut(int width)
Creates an invisible, fixed-width component. |
static Component | createRigidArea(Dimension d)
Creates an invisible component that's always the specified size. |
static Box | createVerticalBox()
Creates a Box that displays its components
from top to bottom. |
static Component | createVerticalGlue()
Creates a vertical glue component. |
static Component | createVerticalStrut(int height)
Creates an invisible, fixed-height component. |
AccessibleContext | getAccessibleContext()
Get the AccessibleContext associated with this JComponent. |
void | setLayout(LayoutManager l)
Throws an AWTError, since a Box can use only a BoxLayout. |
Methods inherited from class java.awt.Container | |
add , add , add , add , add , addContainerListener , addImpl , addNotify , countComponents , deliverEvent , doLayout , findComponentAt , findComponentAt , getAlignmentX , getAlignmentY , getComponent , getComponentAt , getComponentAt , getComponentCount , getComponents , getInsets , getLayout , getMaximumSize , getMinimumSize , getPreferredSize , insets , invalidate , isAncestorOf , layout , list , list , locate , minimumSize , paint , paintComponents , paramString , preferredSize , print , printComponents , processContainerEvent , processEvent , remove , remove , removeAll , removeContainerListener , removeNotify , update , validate , validateTree |
Methods inherited from class java.lang.Object | |
clone , equals , finalize , getClass , hashCode , notify , notifyAll , wait , wait , wait |
Field Detail |
protected AccessibleContext accessibleContext
Constructor Detail |
public Box(int axis)
Box
that displays its components
along the the specified axis.
axis
- can be either BoxLayout.X_AXIS
(to display components from left to right) or
BoxLayout.Y_AXIS
(to display them from top to bottom)createHorizontalBox()
,
createVerticalBox()
Method Detail |
public static Box createHorizontalBox()
Box
that displays its components
from left to right.public static Box createVerticalBox()
Box
that displays its components
from top to bottom.public static Component createRigidArea(Dimension d)
d
- the dimensions of the invisible componentcreateGlue()
,
createHorizontalStrut(int)
,
createVerticalStrut(int)
public static Component createHorizontalStrut(int width)
width
- the width of the invisible component, in pixels >= 0createVerticalStrut(int)
,
createGlue()
,
createRigidArea(java.awt.Dimension)
public static Component createVerticalStrut(int height)
height
- the height of the invisible component, in pixels >= 0createHorizontalStrut(int)
,
createGlue()
,
createRigidArea(java.awt.Dimension)
public static Component createGlue()
For example, suppose you have a horizontal box that contains two fixed-size components. If the box gets extra space, the fixed-size components won't become larger, so where does the extra space go? Without glue, the extra space goes to the right of the second component. If you put glue between the fixed-size components, then the extra space goes there. If you put glue before the first fixed-size component, the extra space goes there, and the fixed-size components are shoved against the right edge of the box. If you put glue before the first fixed-size component and after the second fixed-size component, the fixed-size components are centered in the box.
To use glue,
call Box.createGlue
and add the returned component to a container.
The glue component has no minimum or preferred size,
so it takes no space unless excess space is available.
If excess space is available,
then the glue component takes its share of available
horizontal or vertical space,
just like any other component that has no maximum width or height.
public static Component createHorizontalGlue()
public static Component createVerticalGlue()
public void setLayout(LayoutManager l)
l
- the layout manager to usepublic AccessibleContext getAccessibleContext()
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Java Platform 1.2 Beta 4 |
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SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |