Java™ Platform
Standard Ed. 6

java.awt
Class GridBagConstraints

java.lang.Object
  extended by java.awt.GridBagConstraints
All Implemented Interfaces:
Serializable, Cloneable

public class GridBagConstraints
extends Object
implements Cloneable, Serializable

The GridBagConstraints class specifies constraints for components that are laid out using the GridBagLayout class.

Since:
JDK1.0
See Also:
GridBagLayout, Serialized Form

Field Summary
static int ABOVE_BASELINE
          Possible value for the anchor field.
static int ABOVE_BASELINE_LEADING
          Possible value for the anchor field.
static int ABOVE_BASELINE_TRAILING
          Possible value for the anchor field.
 int anchor
          This field is used when the component is smaller than its display area.
static int BASELINE
          Possible value for the anchor field.
static int BASELINE_LEADING
          Possible value for the anchor field.
static int BASELINE_TRAILING
          Possible value for the anchor field.
static int BELOW_BASELINE
          Possible value for the anchor field.
static int BELOW_BASELINE_LEADING
          Possible value for the anchor field.
static int BELOW_BASELINE_TRAILING
          Possible value for the anchor field.
static int BOTH
          Resize the component both horizontally and vertically.
static int CENTER
          Put the component in the center of its display area.
static int EAST
          Put the component on the right side of its display area, centered vertically.
 int fill
          This field is used when the component's display area is larger than the component's requested size.
static int FIRST_LINE_END
          Place the component in the corner of its display area where the first line of text on a page would normally end for the current ComponentOrienation.
static int FIRST_LINE_START
          Place the component in the corner of its display area where the first line of text on a page would normally begin for the current ComponentOrienation.
 int gridheight
          Specifies the number of cells in a column for the component's display area.
 int gridwidth
          Specifies the number of cells in a row for the component's display area.
 int gridx
          Specifies the cell containing the leading edge of the component's display area, where the first cell in a row has gridx=0.
 int gridy
          Specifies the cell at the top of the component's display area, where the topmost cell has gridy=0.
static int HORIZONTAL
          Resize the component horizontally but not vertically.
 Insets insets
          This field specifies the external padding of the component, the minimum amount of space between the component and the edges of its display area.
 int ipadx
          This field specifies the internal padding of the component, how much space to add to the minimum width of the component.
 int ipady
          This field specifies the internal padding, that is, how much space to add to the minimum height of the component.
static int LAST_LINE_END
          Place the component in the corner of its display area where the last line of text on a page would normally end for the current ComponentOrienation.
static int LAST_LINE_START
          Place the component in the corner of its display area where the last line of text on a page would normally start for the current ComponentOrienation.
static int LINE_END
          Place the component centered along the edge of its display area where lines of text would normally end for the current ComponentOrienation.
static int LINE_START
          Place the component centered along the edge of its display area where lines of text would normally begin for the current ComponentOrienation.
static int NONE
          Do not resize the component.
static int NORTH
          Put the component at the top of its display area, centered horizontally.
static int NORTHEAST
          Put the component at the top-right corner of its display area.
static int NORTHWEST
          Put the component at the top-left corner of its display area.
static int PAGE_END
          Place the component centered along the edge of its display area associated with the end of a page for the current ComponentOrienation.
static int PAGE_START
          Place the component centered along the edge of its display area associated with the start of a page for the current ComponentOrienation.
static int RELATIVE
          Specifies that this component is the next-to-last component in its column or row (gridwidth, gridheight), or that this component be placed next to the previously added component (gridx, gridy).
static int REMAINDER
          Specifies that this component is the last component in its column or row.
static int SOUTH
          Put the component at the bottom of its display area, centered horizontally.
static int SOUTHEAST
          Put the component at the bottom-right corner of its display area.
static int SOUTHWEST
          Put the component at the bottom-left corner of its display area.
static int VERTICAL
          Resize the component vertically but not horizontally.
 double weightx
          Specifies how to distribute extra horizontal space.
 double weighty
          Specifies how to distribute extra vertical space.
static int WEST
          Put the component on the left side of its display area, centered vertically.
 
Constructor Summary
GridBagConstraints()
          Creates a GridBagConstraint object with all of its fields set to their default value.
GridBagConstraints(int gridx, int gridy, int gridwidth, int gridheight, double weightx, double weighty, int anchor, int fill, Insets insets, int ipadx, int ipady)
          Creates a GridBagConstraints object with all of its fields set to the passed-in arguments.
 
Method Summary
 Object clone()
          Creates a copy of this grid bag constraint.
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

RELATIVE

public static final int RELATIVE
Specifies that this component is the next-to-last component in its column or row (gridwidth, gridheight), or that this component be placed next to the previously added component (gridx, gridy).

See Also:
gridwidth, gridheight, gridx, gridy, Constant Field Values

REMAINDER

public static final int REMAINDER
Specifies that this component is the last component in its column or row.

See Also:
Constant Field Values

NONE

public static final int NONE
Do not resize the component.

See Also:
Constant Field Values

BOTH

public static final int BOTH
Resize the component both horizontally and vertically.

See Also:
Constant Field Values

HORIZONTAL

public static final int HORIZONTAL
Resize the component horizontally but not vertically.

See Also:
Constant Field Values

VERTICAL

public static final int VERTICAL
Resize the component vertically but not horizontally.

See Also:
Constant Field Values

CENTER

public static final int CENTER
Put the component in the center of its display area.

See Also:
Constant Field Values

NORTH

public static final int NORTH
Put the component at the top of its display area, centered horizontally.

See Also:
Constant Field Values

NORTHEAST

public static final int NORTHEAST
Put the component at the top-right corner of its display area.

See Also:
Constant Field Values

EAST

public static final int EAST
Put the component on the right side of its display area, centered vertically.

See Also:
Constant Field Values

SOUTHEAST

public static final int SOUTHEAST
Put the component at the bottom-right corner of its display area.

See Also:
Constant Field Values

SOUTH

public static final int SOUTH
Put the component at the bottom of its display area, centered horizontally.

See Also:
Constant Field Values

SOUTHWEST

public static final int SOUTHWEST
Put the component at the bottom-left corner of its display area.

See Also:
Constant Field Values

WEST

public static final int WEST
Put the component on the left side of its display area, centered vertically.

See Also:
Constant Field Values

NORTHWEST

public static final int NORTHWEST
Put the component at the top-left corner of its display area.

See Also:
Constant Field Values

PAGE_START

public static final int PAGE_START
Place the component centered along the edge of its display area associated with the start of a page for the current ComponentOrienation. Equal to NORTH for horizontal orientations.

See Also:
Constant Field Values

PAGE_END

public static final int PAGE_END
Place the component centered along the edge of its display area associated with the end of a page for the current ComponentOrienation. Equal to SOUTH for horizontal orientations.

See Also:
Constant Field Values

LINE_START

public static final int LINE_START
Place the component centered along the edge of its display area where lines of text would normally begin for the current ComponentOrienation. Equal to WEST for horizontal, left-to-right orientations and EAST for horizontal, right-to-left orientations.

See Also:
Constant Field Values

LINE_END

public static final int LINE_END
Place the component centered along the edge of its display area where lines of text would normally end for the current ComponentOrienation. Equal to EAST for horizontal, left-to-right orientations and WEST for horizontal, right-to-left orientations.

See Also:
Constant Field Values

FIRST_LINE_START

public static final int FIRST_LINE_START
Place the component in the corner of its display area where the first line of text on a page would normally begin for the current ComponentOrienation. Equal to NORTHWEST for horizontal, left-to-right orientations and NORTHEAST for horizontal, right-to-left orientations.

See Also:
Constant Field Values

FIRST_LINE_END

public static final int FIRST_LINE_END
Place the component in the corner of its display area where the first line of text on a page would normally end for the current ComponentOrienation. Equal to NORTHEAST for horizontal, left-to-right orientations and NORTHWEST for horizontal, right-to-left orientations.

See Also:
Constant Field Values

LAST_LINE_START

public static final int LAST_LINE_START
Place the component in the corner of its display area where the last line of text on a page would normally start for the current ComponentOrienation. Equal to SOUTHWEST for horizontal, left-to-right orientations and SOUTHEAST for horizontal, right-to-left orientations.

See Also:
Constant Field Values

LAST_LINE_END

public static final int LAST_LINE_END
Place the component in the corner of its display area where the last line of text on a page would normally end for the current ComponentOrienation. Equal to SOUTHEAST for horizontal, left-to-right orientations and SOUTHWEST for horizontal, right-to-left orientations.

See Also:
Constant Field Values

BASELINE

public static final int BASELINE
Possible value for the anchor field. Specifies that the component should be horizontally centered and vertically aligned along the baseline of the prevailing row. If the component does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

BASELINE_LEADING

public static final int BASELINE_LEADING
Possible value for the anchor field. Specifies that the component should be horizontally placed along the leading edge. For components with a left-to-right orientation, the leading edge is the left edge. Vertically the component is aligned along the baseline of the prevailing row. If the component does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

BASELINE_TRAILING

public static final int BASELINE_TRAILING
Possible value for the anchor field. Specifies that the component should be horizontally placed along the trailing edge. For components with a left-to-right orientation, the trailing edge is the right edge. Vertically the component is aligned along the baseline of the prevailing row. If the component does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

ABOVE_BASELINE

public static final int ABOVE_BASELINE
Possible value for the anchor field. Specifies that the component should be horizontally centered. Vertically the component is positioned so that its bottom edge touches the baseline of the starting row. If the starting row does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

ABOVE_BASELINE_LEADING

public static final int ABOVE_BASELINE_LEADING
Possible value for the anchor field. Specifies that the component should be horizontally placed along the leading edge. For components with a left-to-right orientation, the leading edge is the left edge. Vertically the component is positioned so that its bottom edge touches the baseline of the starting row. If the starting row does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

ABOVE_BASELINE_TRAILING

public static final int ABOVE_BASELINE_TRAILING
Possible value for the anchor field. Specifies that the component should be horizontally placed along the trailing edge. For components with a left-to-right orientation, the trailing edge is the right edge. Vertically the component is positioned so that its bottom edge touches the baseline of the starting row. If the starting row does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

BELOW_BASELINE

public static final int BELOW_BASELINE
Possible value for the anchor field. Specifies that the component should be horizontally centered. Vertically the component is positioned so that its top edge touches the baseline of the starting row. If the starting row does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

BELOW_BASELINE_LEADING

public static final int BELOW_BASELINE_LEADING
Possible value for the anchor field. Specifies that the component should be horizontally placed along the leading edge. For components with a left-to-right orientation, the leading edge is the left edge. Vertically the component is positioned so that its top edge touches the baseline of the starting row. If the starting row does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

BELOW_BASELINE_TRAILING

public static final int BELOW_BASELINE_TRAILING
Possible value for the anchor field. Specifies that the component should be horizontally placed along the trailing edge. For components with a left-to-right orientation, the trailing edge is the right edge. Vertically the component is positioned so that its top edge touches the baseline of the starting row. If the starting row does not have a baseline it will be vertically centered.

Since:
1.6
See Also:
Constant Field Values

gridx

public int gridx
Specifies the cell containing the leading edge of the component's display area, where the first cell in a row has gridx=0. The leading edge of a component's display area is its left edge for a horizontal, left-to-right container and its right edge for a horizontal, right-to-left container. The value RELATIVE specifies that the component be placed immediately following the component that was added to the container just before this component was added.

The default value is RELATIVE. gridx should be a non-negative value.

See Also:
clone(), gridy, ComponentOrientation

gridy

public int gridy
Specifies the cell at the top of the component's display area, where the topmost cell has gridy=0. The value RELATIVE specifies that the component be placed just below the component that was added to the container just before this component was added.

The default value is RELATIVE. gridy should be a non-negative value.

See Also:
clone(), gridx

gridwidth

public int gridwidth
Specifies the number of cells in a row for the component's display area.

Use REMAINDER to specify that the component's display area will be from gridx to the last cell in the row. Use RELATIVE to specify that the component's display area will be from gridx to the next to the last one in its row.

gridwidth should be non-negative and the default value is 1.

See Also:
clone(), gridheight

gridheight

public int gridheight
Specifies the number of cells in a column for the component's display area.

Use REMAINDER to specify that the component's display area will be from gridy to the last cell in the column. Use RELATIVE to specify that the component's display area will be from gridy to the next to the last one in its column.

gridheight should be a non-negative value and the default value is 1.

See Also:
clone(), gridwidth

weightx

public double weightx
Specifies how to distribute extra horizontal space.

The grid bag layout manager calculates the weight of a column to be the maximum weightx of all the components in a column. If the resulting layout is smaller horizontally than the area it needs to fill, the extra space is distributed to each column in proportion to its weight. A column that has a weight of zero receives no extra space.

If all the weights are zero, all the extra space appears between the grids of the cell and the left and right edges.

The default value of this field is 0. weightx should be a non-negative value.

See Also:
clone(), weighty

weighty

public double weighty
Specifies how to distribute extra vertical space.

The grid bag layout manager calculates the weight of a row to be the maximum weighty of all the components in a row. If the resulting layout is smaller vertically than the area it needs to fill, the extra space is distributed to each row in proportion to its weight. A row that has a weight of zero receives no extra space.

If all the weights are zero, all the extra space appears between the grids of the cell and the top and bottom edges.

The default value of this field is 0. weighty should be a non-negative value.

See Also:
clone(), weightx

anchor

public int anchor
This field is used when the component is smaller than its display area. It determines where, within the display area, to place the component.

There are three kinds of possible values: orientation relative, baseline relative and absolute. Orientation relative values are interpreted relative to the container's component orientation property, baseline relative values are interpreted relative to the baseline and absolute values are not. The absolute values are: CENTER, NORTH, NORTHEAST, EAST, SOUTHEAST, SOUTH, SOUTHWEST, WEST, and NORTHWEST. The orientation relative values are: PAGE_START, PAGE_END, LINE_START, LINE_END, FIRST_LINE_START, FIRST_LINE_END, LAST_LINE_START and LAST_LINE_END. The baseline relvative values are: BASELINE, BASELINE_LEADING, BASELINE_TRAILING, ABOVE_BASELINE, ABOVE_BASELINE_LEADING, ABOVE_BASELINE_TRAILING, BELOW_BASELINE, BELOW_BASELINE_LEADING, and BELOW_BASELINE_TRAILING. The default value is CENTER.

See Also:
clone(), ComponentOrientation

fill

public int fill
This field is used when the component's display area is larger than the component's requested size. It determines whether to resize the component, and if so, how.

The following values are valid for fill:

The default value is NONE.

See Also:
clone()

insets

public Insets insets
This field specifies the external padding of the component, the minimum amount of space between the component and the edges of its display area.

The default value is new Insets(0, 0, 0, 0).

See Also:
clone()

ipadx

public int ipadx
This field specifies the internal padding of the component, how much space to add to the minimum width of the component. The width of the component is at least its minimum width plus ipadx pixels.

The default value is 0.

See Also:
clone(), ipady

ipady

public int ipady
This field specifies the internal padding, that is, how much space to add to the minimum height of the component. The height of the component is at least its minimum height plus ipady pixels.

The default value is 0.

See Also:
clone(), ipadx
Constructor Detail

GridBagConstraints

public GridBagConstraints()
Creates a GridBagConstraint object with all of its fields set to their default value.


GridBagConstraints

public GridBagConstraints(int gridx,
                          int gridy,
                          int gridwidth,
                          int gridheight,
                          double weightx,
                          double weighty,
                          int anchor,
                          int fill,
                          Insets insets,
                          int ipadx,
                          int ipady)
Creates a GridBagConstraints object with all of its fields set to the passed-in arguments. Note: Because the use of this constructor hinders readability of source code, this constructor should only be used by automatic source code generation tools.

Parameters:
gridx - The initial gridx value.
gridy - The initial gridy value.
gridwidth - The initial gridwidth value.
gridheight - The initial gridheight value.
weightx - The initial weightx value.
weighty - The initial weighty value.
anchor - The initial anchor value.
fill - The initial fill value.
insets - The initial insets value.
ipadx - The initial ipadx value.
ipady - The initial ipady value.
Since:
1.2
See Also:
gridx, gridy, gridwidth, gridheight, weightx, weighty, anchor, fill, insets, ipadx, ipady
Method Detail

clone

public Object clone()
Creates a copy of this grid bag constraint.

Overrides:
clone in class Object
Returns:
a copy of this grid bag constraint
See Also:
Cloneable

Java™ Platform
Standard Ed. 6

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