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Class GridBagConstraints

java.lang.Object

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:

1.0

See Also:

Field Summary

Modifier and Type	Field	Description
`static final int`	`ABOVE_BASELINE`	Possible value for the `anchor` field.
`static final int`	`ABOVE_BASELINE_LEADING`	Possible value for the `anchor` field.
`static final 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 final int`	`BASELINE`	Possible value for the `anchor` field.
`static final int`	`BASELINE_LEADING`	Possible value for the `anchor` field.
`static final int`	`BASELINE_TRAILING`	Possible value for the `anchor` field.
`static final int`	`BELOW_BASELINE`	Possible value for the `anchor` field.
`static final int`	`BELOW_BASELINE_LEADING`	Possible value for the `anchor` field.
`static final int`	`BELOW_BASELINE_TRAILING`	Possible value for the `anchor` field.
`static final int`	`BOTH`	Resize the component both horizontally and vertically.
`static final int`	`CENTER`	Put the component in the center of its display area.
`static final 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 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 `ComponentOrientation`.
`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 `ComponentOrientation`.
`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 final 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 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 `ComponentOrientation`.
`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 `ComponentOrientation`.
`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 `ComponentOrientation`.
`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 `ComponentOrientation`.
`static final int`	`NONE`	Do not resize the component.
`static final int`	`NORTH`	Put the component at the top of its display area, centered horizontally.
`static final int`	`NORTHEAST`	Put the component at the top-right corner of its display area.
`static final int`	`NORTHWEST`	Put the component at the top-left corner of its display area.
`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 `ComponentOrientation`.
`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 `ComponentOrientation`.
`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`).
`static final int`	`REMAINDER`	Specifies that this component is the last component in its column or row.
`static final int`	`SOUTH`	Put the component at the bottom of its display area, centered horizontally.
`static final int`	`SOUTHEAST`	Put the component at the bottom-right corner of its display area.
`static final int`	`SOUTHWEST`	Put the component at the bottom-left corner of its display area.
`static final 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 final int`	`WEST`	Put the component on the left side of its display area, centered vertically.

Constructor Summary

Constructor	Description
`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

Modifier and Type	Method	Description
`Object`	`clone()`	Creates a copy of this grid bag constraint.

Methods declared in class java.lang.Object

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

Field Details

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).

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REMAINDER

public static final int REMAINDER

Specifies that this component is the last component in its column or row.

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NONE

public static final int NONE

Do not resize the component.

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BOTH

public static final int BOTH

Resize the component both horizontally and vertically.

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HORIZONTAL

public static final int HORIZONTAL

Resize the component horizontally but not vertically.

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VERTICAL

public static final int VERTICAL

Resize the component vertically but not horizontally.

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CENTER

public static final int CENTER

Put the component in the center of its display area.

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NORTH

public static final int NORTH

Put the component at the top of its display area, centered horizontally.

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NORTHEAST

public static final int NORTHEAST

Put the component at the top-right corner of its display area.

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EAST

public static final int EAST

Put the component on the right side of its display area, centered vertically.

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SOUTHEAST

public static final int SOUTHEAST

Put the component at the bottom-right corner of its display area.

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SOUTH

public static final int SOUTH

Put the component at the bottom of its display area, centered horizontally.

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SOUTHWEST

public static final int SOUTHWEST

Put the component at the bottom-left corner of its display area.

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WEST

public static final int WEST

Put the component on the left side of its display area, centered vertically.

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NORTHWEST

public static final int NORTHWEST

Put the component at the top-left corner of its display area.

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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 ComponentOrientation. Equal to NORTH for horizontal orientations.

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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 ComponentOrientation. Equal to SOUTH for horizontal orientations.

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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 ComponentOrientation. Equal to WEST for horizontal, left-to-right orientations and EAST for horizontal, right-to-left orientations.

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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 ComponentOrientation. Equal to EAST for horizontal, left-to-right orientations and WEST for horizontal, right-to-left orientations.

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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 ComponentOrientation. Equal to NORTHWEST for horizontal, left-to-right orientations and NORTHEAST for horizontal, right-to-left orientations.

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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 ComponentOrientation. Equal to NORTHEAST for horizontal, left-to-right orientations and NORTHWEST for horizontal, right-to-left orientations.

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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 ComponentOrientation. Equal to SOUTHWEST for horizontal, left-to-right orientations and SOUTHEAST for horizontal, right-to-left orientations.

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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 ComponentOrientation. Equal to SOUTHEAST for horizontal, left-to-right orientations and SOUTHWEST for horizontal, right-to-left orientations.

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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

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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

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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

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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

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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

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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

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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

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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:

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

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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.

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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.

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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.

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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.

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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.

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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.

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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 relative 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.

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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:

NONE: Do not resize the component.
HORIZONTAL: Make the component wide enough to fill its display area horizontally, but do not change its height.
VERTICAL: Make the component tall enough to fill its display area vertically, but do not change its width.
BOTH: Make the component fill its display area entirely.

The default value is NONE.

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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).

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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.

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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.

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Constructor Details

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

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Method Details

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

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/GridBagConstraints.html