Class GridBagLayout
- java.lang.Object
-
- java.awt.GridBagLayout
- All Implemented Interfaces:
-
LayoutManager
,LayoutManager2
,Serializable
public class GridBagLayout extends Object implements LayoutManager2, Serializable
The GridBagLayout
class is a flexible layout manager that aligns components vertically, horizontally or along their baseline without requiring that the components be of the same size. Each GridBagLayout
object maintains a dynamic, rectangular grid of cells, with each component occupying one or more cells, called its display area.
Each component managed by a GridBagLayout
is associated with an instance of GridBagConstraints
. The constraints object specifies where a component's display area should be located on the grid and how the component should be positioned within its display area. In addition to its constraints object, the GridBagLayout
also considers each component's minimum and preferred sizes in order to determine a component's size.
The overall orientation of the grid depends on the container's ComponentOrientation
property. For horizontal left-to-right orientations, grid coordinate (0,0) is in the upper left corner of the container with x increasing to the right and y increasing downward. For horizontal right-to-left orientations, grid coordinate (0,0) is in the upper right corner of the container with x increasing to the left and y increasing downward.
To use a grid bag layout effectively, you must customize one or more of the GridBagConstraints
objects that are associated with its components. You customize a GridBagConstraints
object by setting one or more of its instance variables:
-
GridBagConstraints.gridx
,GridBagConstraints.gridy
- Specifies the cell containing the leading corner of the component's display area, where the cell at the origin of the grid has address
gridx = 0
,gridy = 0
. For horizontal left-to-right layout, a component's leading corner is its upper left. For horizontal right-to-left layout, a component's leading corner is its upper right. UseGridBagConstraints.RELATIVE
(the default value) to specify that the component be placed immediately following (along the x axis forgridx
or the y axis forgridy
) the component that was added to the container just before this component was added. -
GridBagConstraints.gridwidth
,GridBagConstraints.gridheight
- Specifies the number of cells in a row (for
gridwidth
) or column (forgridheight
) in the component's display area. The default value is 1. UseGridBagConstraints.REMAINDER
to specify that the component's display area will be fromgridx
to the last cell in the row (forgridwidth
) or fromgridy
to the last cell in the column (forgridheight
). UseGridBagConstraints.RELATIVE
to specify that the component's display area will be fromgridx
to the next to the last cell in its row (forgridwidth
or fromgridy
to the next to the last cell in its column (forgridheight
). -
GridBagConstraints.fill
- Used when the component's display area is larger than the component's requested size to determine whether (and how) to resize the component. Possible values are
GridBagConstraints.NONE
(the default),GridBagConstraints.HORIZONTAL
(make the component wide enough to fill its display area horizontally, but don't change its height),GridBagConstraints.VERTICAL
(make the component tall enough to fill its display area vertically, but don't change its width), andGridBagConstraints.BOTH
(make the component fill its display area entirely). -
GridBagConstraints.ipadx
,GridBagConstraints.ipady
- Specifies the component's internal padding within the layout, how much to add to the minimum size of the component. The width of the component will be at least its minimum width plus
ipadx
pixels. Similarly, the height of the component will be at least the minimum height plusipady
pixels. -
GridBagConstraints.insets
- Specifies the component's external padding, the minimum amount of space between the component and the edges of its display area.
-
GridBagConstraints.anchor
- Specifies where the component should be positioned in its display area. There are three kinds of possible values: absolute, orientation-relative, and baseline-relative Orientation relative values are interpreted relative to the container's
ComponentOrientation
property while absolute values are not. Baseline relative values are calculated relative to the baseline. Valid values are:Absolute, relative and baseline values as described above Absolute Values
Orientation Relative Values
Baseline Relative Values
GridBagConstraints.NORTH
GridBagConstraints.SOUTH
GridBagConstraints.WEST
GridBagConstraints.EAST
GridBagConstraints.NORTHWEST
GridBagConstraints.NORTHEAST
GridBagConstraints.SOUTHWEST
GridBagConstraints.SOUTHEAST
-
GridBagConstraints.CENTER
(the default)
GridBagConstraints.PAGE_START
GridBagConstraints.PAGE_END
GridBagConstraints.LINE_START
GridBagConstraints.LINE_END
GridBagConstraints.FIRST_LINE_START
GridBagConstraints.FIRST_LINE_END
GridBagConstraints.LAST_LINE_START
GridBagConstraints.LAST_LINE_END
GridBagConstraints.BASELINE
GridBagConstraints.BASELINE_LEADING
GridBagConstraints.BASELINE_TRAILING
GridBagConstraints.ABOVE_BASELINE
GridBagConstraints.ABOVE_BASELINE_LEADING
GridBagConstraints.ABOVE_BASELINE_TRAILING
GridBagConstraints.BELOW_BASELINE
GridBagConstraints.BELOW_BASELINE_LEADING
GridBagConstraints.BELOW_BASELINE_TRAILING
-
GridBagConstraints.weightx
,GridBagConstraints.weighty
- Used to determine how to distribute space, which is important for specifying resizing behavior. Unless you specify a weight for at least one component in a row (
weightx
) and column (weighty
), all the components clump together in the center of their container. This is because when the weight is zero (the default), theGridBagLayout
object puts any extra space between its grid of cells and the edges of the container.
Each row may have a baseline; the baseline is determined by the components in that row that have a valid baseline and are aligned along the baseline (the component's anchor value is one of
BASELINE
, BASELINE_LEADING
or BASELINE_TRAILING
). If none of the components in the row has a valid baseline, the row does not have a baseline.
If a component spans rows it is aligned either to the baseline of the start row (if the baseline-resize behavior is
CONSTANT_ASCENT
) or the end row (if the baseline-resize behavior is CONSTANT_DESCENT
). The row that the component is aligned to is called the prevailing row.
The following figure shows a baseline layout and includes a component that spans rows:
- A panel that starts in row 0 and ends in row 1. The panel has a baseline-resize behavior of
CONSTANT_DESCENT
and has an anchor ofBASELINE
. As the baseline-resize behavior isCONSTANT_DESCENT
the prevailing row for the panel is row 1. - Two buttons, each with a baseline-resize behavior of
CENTER_OFFSET
and an anchor ofBASELINE
.
Components positioned using one of the baseline-relative values resize differently than when positioned using an absolute or orientation-relative value. How components change is dictated by how the baseline of the prevailing row changes. The baseline is anchored to the bottom of the display area if any components with the same prevailing row have a baseline-resize behavior of CONSTANT_DESCENT
, otherwise the baseline is anchored to the top of the display area. The following rules dictate the resize behavior:
- Resizable components positioned above the baseline can only grow as tall as the baseline. For example, if the baseline is at 100 and anchored at the top, a resizable component positioned above the baseline can never grow more than 100 units.
- Similarly, resizable components positioned below the baseline can only grow as high as the difference between the display height and the baseline.
- Resizable components positioned on the baseline with a baseline-resize behavior of
OTHER
are only resized if the baseline at the resized size fits within the display area. If the baseline is such that it does not fit within the display area the component is not resized. - Components positioned on the baseline that do not have a baseline-resize behavior of
OTHER
can only grow as tall asdisplay height - baseline + baseline of component
.
The following figures show ten components (all buttons) managed by a grid bag layout. Figure 2 shows the layout for a horizontal, left-to-right container and Figure 3 shows the layout for a horizontal, right-to-left container.
Figure 2: Horizontal, Left-to-Right | Figure 3: Horizontal, Right-to-Left |
Each of the ten components has the fill
field of its associated GridBagConstraints
object set to GridBagConstraints.BOTH
. In addition, the components have the following non-default constraints:
- Button1, Button2, Button3:
weightx = 1.0
- Button4:
weightx = 1.0
,gridwidth = GridBagConstraints.REMAINDER
- Button5:
gridwidth = GridBagConstraints.REMAINDER
- Button6:
gridwidth = GridBagConstraints.RELATIVE
- Button7:
gridwidth = GridBagConstraints.REMAINDER
- Button8:
gridheight = 2
,weighty = 1.0
- Button9, Button 10:
gridwidth = GridBagConstraints.REMAINDER
Here is the code that implements the example shown above:
import java.awt.*; import java.util.*; import java.applet.Applet; public class GridBagEx1 extends Applet { protected void makebutton(String name, GridBagLayout gridbag, GridBagConstraints c) { Button button = new Button(name); gridbag.setConstraints(button, c); add(button); } public void init() { GridBagLayout gridbag = new GridBagLayout(); GridBagConstraints c = new GridBagConstraints(); setFont(new Font("SansSerif", Font.PLAIN, 14)); setLayout(gridbag); c.fill = GridBagConstraints.BOTH; c.weightx = 1.0; makebutton("Button1", gridbag, c); makebutton("Button2", gridbag, c); makebutton("Button3", gridbag, c); c.gridwidth = GridBagConstraints.REMAINDER; //end row makebutton("Button4", gridbag, c); c.weightx = 0.0; //reset to the default makebutton("Button5", gridbag, c); //another row c.gridwidth = GridBagConstraints.RELATIVE; //next-to-last in row makebutton("Button6", gridbag, c); c.gridwidth = GridBagConstraints.REMAINDER; //end row makebutton("Button7", gridbag, c); c.gridwidth = 1; //reset to the default c.gridheight = 2; c.weighty = 1.0; makebutton("Button8", gridbag, c); c.weighty = 0.0; //reset to the default c.gridwidth = GridBagConstraints.REMAINDER; //end row c.gridheight = 1; //reset to the default makebutton("Button9", gridbag, c); makebutton("Button10", gridbag, c); setSize(300, 100); } public static void main(String args[]) { Frame f = new Frame("GridBag Layout Example"); GridBagEx1 ex1 = new GridBagEx1(); ex1.init(); f.add("Center", ex1); f.pack(); f.setSize(f.getPreferredSize()); f.show(); } }
- Since:
- 1.0
- See Also:
-
GridBagConstraints
,GridBagLayoutInfo
,ComponentOrientation
, Serialized Form
Field Summary
Modifier and Type | Field | Description |
---|---|---|
double[] | columnWeights | This field holds the overrides to the column weights. |
int[] | columnWidths | This field holds the overrides to the column minimum width. |
protected Hashtable<Component,GridBagConstraints> | comptable | This hashtable maintains the association between a component and its gridbag constraints. |
protected GridBagConstraints | defaultConstraints | This field holds a gridbag constraints instance containing the default values, so if a component does not have gridbag constraints associated with it, then the component will be assigned a copy of the |
protected GridBagLayoutInfo | layoutInfo | This field holds the layout information for the gridbag. |
protected static int | MAXGRIDSIZE | This field is no longer used to reserve arrays and kept for backward compatibility. |
protected static int | MINSIZE | The smallest grid that can be laid out by the grid bag layout. |
protected static int | PREFERREDSIZE | The preferred grid size that can be laid out by the grid bag layout. |
int[] | rowHeights | This field holds the overrides to the row minimum heights. |
double[] | rowWeights | This field holds the overrides to the row weights. |
Constructor Summary
Constructor | Description |
---|---|
GridBagLayout() | Creates a grid bag layout manager. |
Method Summary
Modifier and Type | Method | Description |
---|---|---|
void | addLayoutComponent(Component comp,
Object constraints) | Adds the specified component to the layout, using the specified |
void | addLayoutComponent(String name,
Component comp) | Has no effect, since this layout manager does not use a per-component string. |
protected void | adjustForGravity(GridBagConstraints constraints,
Rectangle r) | Adjusts the x, y, width, and height fields to the correct values depending on the constraint geometry and pads. |
protected void | AdjustForGravity(GridBagConstraints constraints,
Rectangle r) | Adjusts the x, y, width, and height fields to the correct values depending on the constraint geometry and pads. |
protected void | arrangeGrid(Container parent) | Lays out the grid. |
protected void | ArrangeGrid(Container parent) | This method is obsolete and supplied for backwards compatibility only; new code should call |
GridBagConstraints | getConstraints(Component comp) | Gets the constraints for the specified component. |
float | getLayoutAlignmentX(Container parent) | Returns the alignment along the x axis. |
float | getLayoutAlignmentY(Container parent) | Returns the alignment along the y axis. |
int[][] | getLayoutDimensions() | Determines column widths and row heights for the layout grid. |
protected GridBagLayoutInfo | getLayoutInfo(Container parent,
int sizeflag) | Fills in an instance of |
protected GridBagLayoutInfo | GetLayoutInfo(Container parent,
int sizeflag) | This method is obsolete and supplied for backwards compatibility only; new code should call |
Point | getLayoutOrigin() | Determines the origin of the layout area, in the graphics coordinate space of the target container. |
double[][] | getLayoutWeights() | Determines the weights of the layout grid's columns and rows. |
protected Dimension | getMinSize(Container parent,
GridBagLayoutInfo info) | Figures out the minimum size of the master based on the information from |
protected Dimension | GetMinSize(Container parent,
GridBagLayoutInfo info) | This method is obsolete and supplied for backwards compatibility only; new code should call |
void | invalidateLayout(Container target) | Invalidates the layout, indicating that if the layout manager has cached information it should be discarded. |
void | layoutContainer(Container parent) | Lays out the specified container using this grid bag layout. |
Point | location(int x,
int y) | Determines which cell in the layout grid contains the point specified by |
protected GridBagConstraints | lookupConstraints(Component comp) | Retrieves the constraints for the specified component. |
Dimension | maximumLayoutSize(Container target) | Returns the maximum dimensions for this layout given the components in the specified target container. |
Dimension | minimumLayoutSize(Container parent) | Determines the minimum size of the |
Dimension | preferredLayoutSize(Container parent) | Determines the preferred size of the |
void | removeLayoutComponent(Component comp) | Removes the specified component from this layout. |
void | setConstraints(Component comp,
GridBagConstraints constraints) | Sets the constraints for the specified component in this layout. |
String | toString() | Returns a string representation of this grid bag layout's values. |
Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Field Detail
MAXGRIDSIZE
protected static final int MAXGRIDSIZE
This field is no longer used to reserve arrays and kept for backward compatibility. Previously, this was the maximum number of grid positions (both horizontal and vertical) that could be laid out by the grid bag layout. Current implementation doesn't impose any limits on the size of a grid.
- See Also:
- Constant Field Values
MINSIZE
protected static final int MINSIZE
The smallest grid that can be laid out by the grid bag layout.
- See Also:
- Constant Field Values
PREFERREDSIZE
protected static final int PREFERREDSIZE
The preferred grid size that can be laid out by the grid bag layout.
- See Also:
- Constant Field Values
comptable
protected Hashtable<Component,GridBagConstraints> comptable
This hashtable maintains the association between a component and its gridbag constraints. The Keys in comptable
are the components and the values are the instances of GridBagConstraints
.
- See Also:
GridBagConstraints
defaultConstraints
protected GridBagConstraints defaultConstraints
This field holds a gridbag constraints instance containing the default values, so if a component does not have gridbag constraints associated with it, then the component will be assigned a copy of the defaultConstraints
.
- See Also:
-
getConstraints(Component)
,setConstraints(Component, GridBagConstraints)
,lookupConstraints(Component)
layoutInfo
protected GridBagLayoutInfo layoutInfo
This field holds the layout information for the gridbag. The information in this field is based on the most recent validation of the gridbag. If layoutInfo
is null
this indicates that there are no components in the gridbag or if there are components, they have not yet been validated.
- See Also:
getLayoutInfo(Container, int)
columnWidths
public int[] columnWidths
This field holds the overrides to the column minimum width. If this field is non-null
the values are applied to the gridbag after all of the minimum columns widths have been calculated. If columnWidths has more elements than the number of columns, columns are added to the gridbag to match the number of elements in columnWidth.
- See Also:
getLayoutDimensions()
rowHeights
public int[] rowHeights
This field holds the overrides to the row minimum heights. If this field is non-null
the values are applied to the gridbag after all of the minimum row heights have been calculated. If rowHeights
has more elements than the number of rows, rows are added to the gridbag to match the number of elements in rowHeights
.
- See Also:
getLayoutDimensions()
columnWeights
public double[] columnWeights
This field holds the overrides to the column weights. If this field is non-null
the values are applied to the gridbag after all of the columns weights have been calculated. If columnWeights[i] >
weight for column i, then column i is assigned the weight in columnWeights[i]
. If columnWeights
has more elements than the number of columns, the excess elements are ignored - they do not cause more columns to be created.
rowWeights
public double[] rowWeights
This field holds the overrides to the row weights. If this field is non-null
the values are applied to the gridbag after all of the rows weights have been calculated. If rowWeights[i] >
weight for row i, then row i is assigned the weight in rowWeights[i]
. If rowWeights
has more elements than the number of rows, the excess elements are ignored - they do not cause more rows to be created.
Constructor Detail
GridBagLayout
public GridBagLayout()
Creates a grid bag layout manager.
Method Detail
setConstraints
public void setConstraints(Component comp, GridBagConstraints constraints)
Sets the constraints for the specified component in this layout.
- Parameters:
-
comp
- the component to be modified -
constraints
- the constraints to be applied
getConstraints
public GridBagConstraints getConstraints(Component comp)
Gets the constraints for the specified component. A copy of the actual GridBagConstraints
object is returned.
- Parameters:
-
comp
- the component to be queried - Returns:
- the constraint for the specified component in this grid bag layout; a copy of the actual constraint object is returned
lookupConstraints
protected GridBagConstraints lookupConstraints(Component comp)
Retrieves the constraints for the specified component. The return value is not a copy, but is the actual GridBagConstraints
object used by the layout mechanism.
If comp
is not in the GridBagLayout
, a set of default GridBagConstraints
are returned. A comp
value of null
is invalid and returns null
.
- Parameters:
-
comp
- the component to be queried - Returns:
- the constraints for the specified component
getLayoutOrigin
public Point getLayoutOrigin()
Determines the origin of the layout area, in the graphics coordinate space of the target container. This value represents the pixel coordinates of the top-left corner of the layout area regardless of the ComponentOrientation
value of the container. This is distinct from the grid origin given by the cell coordinates (0,0). Most applications do not call this method directly.
- Returns:
- the graphics origin of the cell in the top-left corner of the layout grid
- Since:
- 1.1
- See Also:
ComponentOrientation
getLayoutDimensions
public int[][] getLayoutDimensions()
Determines column widths and row heights for the layout grid.
Most applications do not call this method directly.
- Returns:
- an array of two arrays, containing the widths of the layout columns and the heights of the layout rows
- Since:
- 1.1
getLayoutWeights
public double[][] getLayoutWeights()
Determines the weights of the layout grid's columns and rows. Weights are used to calculate how much a given column or row stretches beyond its preferred size, if the layout has extra room to fill.
Most applications do not call this method directly.
- Returns:
- an array of two arrays, representing the horizontal weights of the layout columns and the vertical weights of the layout rows
- Since:
- 1.1
location
public Point location(int x, int y)
Determines which cell in the layout grid contains the point specified by (x, y)
. Each cell is identified by its column index (ranging from 0 to the number of columns minus 1) and its row index (ranging from 0 to the number of rows minus 1).
If the (x, y)
point lies outside the grid, the following rules are used. The column index is returned as zero if x
lies to the left of the layout for a left-to-right container or to the right of the layout for a right-to-left container. The column index is returned as the number of columns if x
lies to the right of the layout in a left-to-right container or to the left in a right-to-left container. The row index is returned as zero if y
lies above the layout, and as the number of rows if y
lies below the layout. The orientation of a container is determined by its ComponentOrientation
property.
- Parameters:
-
x
- the x coordinate of a point -
y
- the y coordinate of a point - Returns:
- an ordered pair of indexes that indicate which cell in the layout grid contains the point (x, y).
- Since:
- 1.1
- See Also:
ComponentOrientation
addLayoutComponent
public void addLayoutComponent(String name, Component comp)
Has no effect, since this layout manager does not use a per-component string.
- Specified by:
-
addLayoutComponent
in interfaceLayoutManager
- Parameters:
-
name
- the string to be associated with the component -
comp
- the component to be added
addLayoutComponent
public void addLayoutComponent(Component comp, Object constraints)
Adds the specified component to the layout, using the specified constraints
object. Note that constraints are mutable and are, therefore, cloned when cached.
- Specified by:
-
addLayoutComponent
in interfaceLayoutManager2
- Parameters:
-
comp
- the component to be added -
constraints
- an object that determines how the component is added to the layout - Throws:
-
IllegalArgumentException
- ifconstraints
is not aGridBagConstraint
removeLayoutComponent
public void removeLayoutComponent(Component comp)
Removes the specified component from this layout.
Most applications do not call this method directly.
- Specified by:
-
removeLayoutComponent
in interfaceLayoutManager
- Parameters:
-
comp
- the component to be removed. - See Also:
-
Container.remove(java.awt.Component)
,Container.removeAll()
preferredLayoutSize
public Dimension preferredLayoutSize(Container parent)
Determines the preferred size of the parent
container using this grid bag layout.
Most applications do not call this method directly.
- Specified by:
-
preferredLayoutSize
in interfaceLayoutManager
- Parameters:
-
parent
- the container in which to do the layout - Returns:
- the preferred size of the
parent
container - See Also:
Container.getPreferredSize()
minimumLayoutSize
public Dimension minimumLayoutSize(Container parent)
Determines the minimum size of the parent
container using this grid bag layout.
Most applications do not call this method directly.
- Specified by:
-
minimumLayoutSize
in interfaceLayoutManager
- Parameters:
-
parent
- the container in which to do the layout - Returns:
- the minimum size of the
parent
container - See Also:
Container.doLayout()
maximumLayoutSize
public Dimension maximumLayoutSize(Container target)
Returns the maximum dimensions for this layout given the components in the specified target container.
- Specified by:
-
maximumLayoutSize
in interfaceLayoutManager2
- Parameters:
-
target
- the container which needs to be laid out - Returns:
- the maximum dimensions for this layout
- See Also:
-
Container
,minimumLayoutSize(Container)
,preferredLayoutSize(Container)
getLayoutAlignmentX
public float getLayoutAlignmentX(Container parent)
Returns the alignment along the x axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.
- Specified by:
-
getLayoutAlignmentX
in interfaceLayoutManager2
- Parameters:
-
parent
- the target container - Returns:
- the value
0.5f
to indicate centered
getLayoutAlignmentY
public float getLayoutAlignmentY(Container parent)
Returns the alignment along the y axis. This specifies how the component would like to be aligned relative to other components. The value should be a number between 0 and 1 where 0 represents alignment along the origin, 1 is aligned the furthest away from the origin, 0.5 is centered, etc.
- Specified by:
-
getLayoutAlignmentY
in interfaceLayoutManager2
- Parameters:
-
parent
- the target container - Returns:
- the value
0.5f
to indicate centered
invalidateLayout
public void invalidateLayout(Container target)
Invalidates the layout, indicating that if the layout manager has cached information it should be discarded.
- Specified by:
-
invalidateLayout
in interfaceLayoutManager2
- Parameters:
-
target
- the target container
layoutContainer
public void layoutContainer(Container parent)
Lays out the specified container using this grid bag layout. This method reshapes components in the specified container in order to satisfy the constraints of this GridBagLayout
object.
Most applications do not call this method directly.
- Specified by:
-
layoutContainer
in interfaceLayoutManager
- Parameters:
-
parent
- the container in which to do the layout - See Also:
-
Container
,Container.doLayout()
toString
public String toString()
Returns a string representation of this grid bag layout's values.
getLayoutInfo
protected GridBagLayoutInfo getLayoutInfo(Container parent, int sizeflag)
Fills in an instance of GridBagLayoutInfo
for the current set of managed children. This requires three passes through the set of children:
- Figure out the dimensions of the layout grid.
- Determine which cells the components occupy.
- Distribute the weights and min sizes among the rows/columns.
This method should only be used internally by GridBagLayout
.
- Parameters:
-
parent
- the layout container -
sizeflag
- eitherPREFERREDSIZE
orMINSIZE
- Returns:
- the
GridBagLayoutInfo
for the set of children - Since:
- 1.4
GetLayoutInfo
protected GridBagLayoutInfo GetLayoutInfo(Container parent, int sizeflag)
This method is obsolete and supplied for backwards compatibility only; new code should call getLayoutInfo
instead. Fills in an instance of GridBagLayoutInfo
for the current set of managed children. This method is the same as getLayoutInfo
; refer to getLayoutInfo
description for details.
- Parameters:
-
parent
- the layout container -
sizeflag
- eitherPREFERREDSIZE
orMINSIZE
- Returns:
- the
GridBagLayoutInfo
for the set of children
adjustForGravity
protected void adjustForGravity(GridBagConstraints constraints, Rectangle r)
Adjusts the x, y, width, and height fields to the correct values depending on the constraint geometry and pads. This method should only be used internally by GridBagLayout
.
- Parameters:
-
constraints
- the constraints to be applied -
r
- theRectangle
to be adjusted - Since:
- 1.4
AdjustForGravity
protected void AdjustForGravity(GridBagConstraints constraints, Rectangle r)
Adjusts the x, y, width, and height fields to the correct values depending on the constraint geometry and pads.
This method is obsolete and supplied for backwards compatibility only; new code should call adjustForGravity
instead. This method is the same as adjustForGravity
- Parameters:
-
constraints
- the constraints to be applied -
r
- theRectangle
to be adjusted
getMinSize
protected Dimension getMinSize(Container parent, GridBagLayoutInfo info)
Figures out the minimum size of the master based on the information from getLayoutInfo
. This method should only be used internally by GridBagLayout
.
- Parameters:
-
parent
- the layout container -
info
- the layout info for this parent - Returns:
- a
Dimension
object containing the minimum size - Since:
- 1.4
GetMinSize
protected Dimension GetMinSize(Container parent, GridBagLayoutInfo info)
This method is obsolete and supplied for backwards compatibility only; new code should call getMinSize
instead. This method is the same as getMinSize
- Parameters:
-
parent
- the layout container -
info
- the layout info for this parent - Returns:
- a
Dimension
object containing the minimum size
arrangeGrid
protected void arrangeGrid(Container parent)
Lays out the grid. This method should only be used internally by GridBagLayout
.
- Parameters:
-
parent
- the layout container - Since:
- 1.4
ArrangeGrid
protected void ArrangeGrid(Container parent)
This method is obsolete and supplied for backwards compatibility only; new code should call arrangeGrid
instead. This method is the same as arrangeGrid
- Parameters:
-
parent
- the layout container