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JavaTM 2 Platform Std. Ed. v1.6.0
java.awt
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Field Summary | |
---|---|
static String |
AFTER_LAST_LINE
Synonym for PAGE_END. |
static String |
AFTER_LINE_ENDS
Synonym for LINE_END. |
static String |
BEFORE_FIRST_LINE
Synonym for PAGE_START. |
static String |
BEFORE_LINE_BEGINS
Synonym for LINE_START. |
static String |
CENTER
The center layout constraint (middle of container). |
static String |
EAST
The east layout constraint (right side of container). |
static String |
LINE_END
The component goes at the end of the line direction for the layout. |
static String |
LINE_START
The component goes at the beginning of the line direction for the layout. |
static String |
NORTH
The north layout constraint (top of container). |
static String |
PAGE_END
The component comes after the last line of the layout's content. |
static String |
PAGE_START
The component comes before the first line of the layout's content. |
static String |
SOUTH
The south layout constraint (bottom of container). |
static String |
WEST
The west layout constraint (left side of container). |
Constructor Summary | |
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BorderLayout()
Constructs a new border layout with no gaps between components. |
|
BorderLayout(int hgap,
int vgap)
Constructs a border layout with the specified gaps between components. |
Method Summary | |
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void |
addLayoutComponent(Component comp,
Object constraints)
Adds the specified component to the layout, using the specified constraint object. |
void |
addLayoutComponent(String name,
Component comp)
Deprecated. replaced by addLayoutComponent(Component, Object) . |
Object |
getConstraints(Component comp)
Gets the constraints for the specified component |
int |
getHgap()
Returns the horizontal gap between components. |
float |
getLayoutAlignmentX(Container parent)
Returns the alignment along the x axis. |
float |
getLayoutAlignmentY(Container parent)
Returns the alignment along the y axis. |
Component |
getLayoutComponent(Container target,
Object constraints)
Returns the component that corresponds to the given constraint location based on the target Container 's component orientation. |
Component |
getLayoutComponent(Object constraints)
Gets the component that was added using the given constraint |
int |
getVgap()
Returns the vertical gap between components. |
void |
invalidateLayout(Container target)
Invalidates the layout, indicating that if the layout manager has cached information it should be discarded. |
void |
layoutContainer(Container target)
Lays out the container argument using this border layout. |
Dimension |
maximumLayoutSize(Container target)
Returns the maximum dimensions for this layout given the components in the specified target container. |
Dimension |
minimumLayoutSize(Container target)
Determines the minimum size of the target container
using this layout manager. |
Dimension |
preferredLayoutSize(Container target)
Determines the preferred size of the target
container using this layout manager, based on the components
in the container. |
void |
removeLayoutComponent(Component comp)
Removes the specified component from this border layout. |
void |
setHgap(int hgap)
Sets the horizontal gap between components. |
void |
setVgap(int vgap)
Sets the vertical gap between components. |
String |
toString()
Returns a string representation of the state of this border layout. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final String NORTH
public static final String SOUTH
public static final String EAST
public static final String WEST
public static final String CENTER
public static final String BEFORE_FIRST_LINE
PAGE_START
,
Constant Field Valuespublic static final String AFTER_LAST_LINE
PAGE_END
,
Constant Field Valuespublic static final String BEFORE_LINE_BEGINS
LINE_START
,
Constant Field Valuespublic static final String AFTER_LINE_ENDS
LINE_END
,
Constant Field Valuespublic static final String PAGE_START
Component.getComponentOrientation()
,
Constant Field Valuespublic static final String PAGE_END
Component.getComponentOrientation()
,
Constant Field Valuespublic static final String LINE_START
Component.getComponentOrientation()
,
Constant Field Valuespublic static final String LINE_END
Component.getComponentOrientation()
,
Constant Field ValuesConstructor Detail |
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public BorderLayout()
public BorderLayout(int hgap, int vgap)
hgap
and the vertical gap is specified by vgap
.
hgap
- the horizontal gap.vgap
- the vertical gap.Method Detail |
---|
public int getHgap()
public void setHgap(int hgap)
hgap
- the horizontal gap between componentspublic int getVgap()
public void setVgap(int vgap)
vgap
- the vertical gap between componentspublic void addLayoutComponent(Component comp, Object constraints)
NORTH
,
SOUTH
, EAST
,
WEST
, or CENTER
.
Most applications do not call this method directly. This method
is called when a component is added to a container using the
Container.add
method with the same argument types.
addLayoutComponent
in interface LayoutManager2
comp
- the component to be added.constraints
- an object that specifies how and where
the component is added to the layout.
IllegalArgumentException
- if the constraint object is not
a string, or if it not one of the five specified
constants.Container.add(java.awt.Component, java.lang.Object)
@Deprecated public void addLayoutComponent(String name, Component comp)
addLayoutComponent(Component, Object)
.
LayoutManager
comp
to the layout,
associating it
with the string specified by name
.
addLayoutComponent
in interface LayoutManager
name
- the string to be associated with the componentcomp
- the component to be addedpublic void removeLayoutComponent(Component comp)
remove
or
removeAll
methods. Most applications do not call this
method directly.
removeLayoutComponent
in interface LayoutManager
comp
- the component to be removed.Container.remove(java.awt.Component)
,
Container.removeAll()
public Component getLayoutComponent(Object constraints)
constraints
- the desired constraint, one of CENTER
,
NORTH
, SOUTH
,
WEST
, EAST
,
PAGE_START
, PAGE_END
,
LINE_START
, LINE_END
null
if
the location is empty
IllegalArgumentException
- if the constraint object is
not one of the nine specified constantsaddLayoutComponent(java.awt.Component, java.lang.Object)
public Component getLayoutComponent(Container target, Object constraints)
Container
's component orientation.
Components added with the relative constraints PAGE_START
,
PAGE_END
, LINE_START
, and LINE_END
take precedence over components added with the explicit constraints
NORTH
, SOUTH
, WEST
, and EAST
.
The Container
's component orientation is used to determine the location of components
added with LINE_START
and LINE_END
.
constraints
- the desired absolute position, one of CENTER
,
NORTH
, SOUTH
,
EAST
, WEST
target
- the Container
used to obtain
the constraint location based on the target
Container
's component orientation.
null
if
the location is empty
IllegalArgumentException
- if the constraint object is
not one of the five specified constants
NullPointerException
- if the target parameter is nulladdLayoutComponent(java.awt.Component, java.lang.Object)
public Object getConstraints(Component comp)
comp
- the component to be queried
addLayoutComponent(java.awt.Component, java.lang.Object)
public Dimension minimumLayoutSize(Container target)
target
container
using this layout manager.
This method is called when a container calls its
getMinimumSize
method. Most applications do not call
this method directly.
minimumLayoutSize
in interface LayoutManager
target
- the container in which to do the layout.
Container
,
preferredLayoutSize(java.awt.Container)
,
Container.getMinimumSize()
public Dimension preferredLayoutSize(Container target)
target
container using this layout manager, based on the components
in the container.
Most applications do not call this method directly. This method
is called when a container calls its getPreferredSize
method.
preferredLayoutSize
in interface LayoutManager
target
- the container in which to do the layout.
Container
,
minimumLayoutSize(java.awt.Container)
,
Container.getPreferredSize()
public Dimension maximumLayoutSize(Container target)
maximumLayoutSize
in interface LayoutManager2
target
- the component which needs to be laid outContainer
,
minimumLayoutSize(java.awt.Container)
,
preferredLayoutSize(java.awt.Container)
public float getLayoutAlignmentX(Container parent)
getLayoutAlignmentX
in interface LayoutManager2
public float getLayoutAlignmentY(Container parent)
getLayoutAlignmentY
in interface LayoutManager2
public void invalidateLayout(Container target)
invalidateLayout
in interface LayoutManager2
public void layoutContainer(Container target)
This method actually reshapes the components in the specified
container in order to satisfy the constraints of this
BorderLayout
object. The NORTH
and SOUTH
components, if any, are placed at
the top and bottom of the container, respectively. The
WEST
and EAST
components are
then placed on the left and right, respectively. Finally,
the CENTER
object is placed in any remaining
space in the middle.
Most applications do not call this method directly. This method
is called when a container calls its doLayout
method.
layoutContainer
in interface LayoutManager
target
- the container in which to do the layout.Container
,
Container.doLayout()
public String toString()