com.codename1.ui.layouts

Class GridBagLayout

java.lang.Object

com.codename1.ui.layouts.Layout

com.codename1.ui.layouts.GridBagLayout

public class GridBagLayout
extends Layout

Codename One port of the infamous GridBagLayout based on the Apache Harmony code. For new applications we generally recommend a "native" Codename One layout such as TableLayout and recommend avoiding this layout. Its here for developers who are accustomed to it and need to port existing code.

Field Summary

Fields

Modifier and Type	Field and Description
double[]	columnWeights
int[]	columnWidths
protected Hashtable<Component,GridBagConstraints>	comptable
protected GridBagConstraints	defaultConstraints
protected com.codename1.ui.layouts.GridBagLayoutInfo	layoutInfo
protected static int	MAXGRIDSIZE
protected static int	MINSIZE
protected static int	PREFERREDSIZE
int[]	rowHeights
double[]	rowWeights

Constructor Summary

Constructors

Constructor and Description
GridBagLayout()

Method Summary

Modifier and Type	Method and Description
void	addLayoutComponent(Object constraints, Component comp, Container c) Some layouts can optionally track the addition of elements with meta-data that allows the user to "hint" on object positioning.
protected void	adjustForGravity(GridBagConstraints constraints, Rectangle r)
protected void	AdjustForGravity(GridBagConstraints constraints, Rectangle r)
protected void	arrangeGrid(Container parent)
protected void	ArrangeGrid(Container parent)
Object	getComponentConstraint(Component comp) Returns the optional component constraint
int[][]	getLayoutDimensions()
double[][]	getLayoutWeights()
Dimension	getPreferredSize(Container parent) Returns the container preferred size
void	invalidateLayout(Container target)
void	layoutContainer(Container parent) Layout the given parent container children
protected GridBagConstraints	lookupConstraints(Component comp)
void	removeLayoutComponent(Component comp) Removes the component from the layout this operation is only useful if the layout maintains references to components within it
void	setConstraints(Component comp, GridBagConstraints constraints)

Methods inherited from class com.codename1.ui.layouts.Layout

cloneConstraint, equals, getChildrenInTraversalOrder, hashCode, isConstraintTracking, isOverlapSupported, obscuresPotential, overridesTabIndices, updateTabIndices

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAXGRIDSIZE

protected static final int MAXGRIDSIZE

See Also:

Constant Field Values

MINSIZE

protected static final int MINSIZE

See Also:

Constant Field Values

PREFERREDSIZE

protected static final int PREFERREDSIZE

See Also:

Constant Field Values

comptable

protected volatile Hashtable<Component,GridBagConstraints> comptable

defaultConstraints

protected volatile GridBagConstraints defaultConstraints

layoutInfo

protected volatile com.codename1.ui.layouts.GridBagLayoutInfo layoutInfo

columnWeights

public volatile double[] columnWeights

rowWeights

public volatile double[] rowWeights

columnWidths

public volatile int[] columnWidths

rowHeights

public volatile int[] rowHeights

Constructor Detail

GridBagLayout

public GridBagLayout()

Method Detail

addLayoutComponent

public void addLayoutComponent(Object constraints,
                               Component comp,
                               Container c)

Description copied from class: Layout

Some layouts can optionally track the addition of elements with meta-data that allows the user to "hint" on object positioning.

Overrides:

addLayoutComponent in class Layout

Parameters:

constraints - optional meta data information, like alignment orientation

comp - the added component to the layout

c - the parent container

removeLayoutComponent

public void removeLayoutComponent(Component comp)

Description copied from class: Layout

Removes the component from the layout this operation is only useful if the layout maintains references to components within it

Overrides:

removeLayoutComponent in class Layout

Parameters:

comp - the removed component from layout

getComponentConstraint

public Object getComponentConstraint(Component comp)

Description copied from class: Layout

Returns the optional component constraint

Overrides:

getComponentConstraint in class Layout

Parameters:

comp - the component whose constraint should be returned

Returns:

the optional component constraint

setConstraints

public void setConstraints(Component comp,
                           GridBagConstraints constraints)

invalidateLayout

public void invalidateLayout(Container target)

getPreferredSize

public Dimension getPreferredSize(Container parent)

Description copied from class: Layout

Returns the container preferred size

Specified by:

getPreferredSize in class Layout

Parameters:

parent - the parent container

Returns:

the container preferred size

layoutContainer

public void layoutContainer(Container parent)

Description copied from class: Layout

Layout the given parent container children

Specified by:

layoutContainer in class Layout

Parameters:

parent - the given parent container

getLayoutDimensions

public int[][] getLayoutDimensions()

getLayoutWeights

public double[][] getLayoutWeights()

ArrangeGrid

protected void ArrangeGrid(Container parent)

lookupConstraints

protected GridBagConstraints lookupConstraints(Component comp)

adjustForGravity

protected void adjustForGravity(GridBagConstraints constraints,
                                Rectangle r)

arrangeGrid

protected void arrangeGrid(Container parent)

AdjustForGravity

protected void AdjustForGravity(GridBagConstraints constraints,
                                Rectangle r)