org.formaria.aria.helper
Class LayoutHelper

java.lang.Object
  org.formaria.aria.helper.LayoutHelper

All Implemented Interfaces:

ILayoutHelper

public class LayoutHelper
extends java.lang.Object
implements ILayoutHelper

A helper class for working with layout managers. This class provides mappings between the names of layout styles and constraints and the corresponding Java constants.

Copyright (c) Formaria Ltd., 2008

License: see license.txt

$Revision: 2.21 $

Field Summary

static int	BOTTOM
static int	LEFT
static int	RIGHT
static int	TOP

Constructor Summary

LayoutHelper()

Method Summary

java.lang.Object	addLayout(java.lang.Object cont, int type) Sets a LayoutManager for the panel
java.lang.Object	addLayout(java.lang.Object cont, int type, java.util.Hashtable attribs) Sets a LayoutManager for the panel
int	getAlignment(java.lang.String name) Gets a constraint object corresponding to a constraint name
protected java.lang.Integer	getBoxAlignment(java.lang.String value) Convert an attribute value to the equivalent BoxLayout constant, defaults to x-axis if not found.
java.lang.Object	getConstraint(java.lang.String name) Gets a constraint object corresponding to a constraint name
protected int	getIntAttrib(java.util.Hashtable attribs, java.lang.String attrib) Get an attribute as an int value
java.lang.String	getLayoutClass(java.lang.Object layout) Get the layout type
int	getLayoutType(java.lang.String ls) Get the layout type enumerated in Page
boolean	getUsesConstraints(java.lang.Object layout) Does the layout manager use constraints for its children?
boolean	getUsesDimensions(java.lang.Object layout) Does this layout manager used the absoulte dimensions?
void	setAttrib(java.lang.Object cont, java.lang.Object lm, java.lang.String attrib, java.lang.Object value) Set the attributes for a layout manager

Methods inherited from class java.lang.Object

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

Field Detail

LEFT

public static final int LEFT

See Also:

Constant Field Values

RIGHT

public static final int RIGHT

See Also:

Constant Field Values

TOP

public static final int TOP

See Also:

Constant Field Values

BOTTOM

public static final int BOTTOM

See Also:

Constant Field Values

Constructor Detail

LayoutHelper

public LayoutHelper()

Method Detail

addLayout

public java.lang.Object addLayout(java.lang.Object cont,
                                  int type)

Sets a LayoutManager for the panel

Specified by:

addLayout in interface ILayoutHelper

Parameters:

cont - the container whose layout manager is being set or null to set the parent panel's layout manager

type - the layout manager as defined in the LayoutHelper class

addLayout

public java.lang.Object addLayout(java.lang.Object cont,
                                  int type,
                                  java.util.Hashtable attribs)

Sets a LayoutManager for the panel

Specified by:

addLayout in interface ILayoutHelper

Parameters:

cont - the container whose layout manager is being set or null to set the parent panel's layout manager

type - the layout manager as defined in the LayoutHelper class

getAlignment

public int getAlignment(java.lang.String name)

Gets a constraint object corresponding to a constraint name

Specified by:

getAlignment in interface ILayoutHelper

Parameters:

name - the constraint name

Returns:

the constraint object

getLayoutType

public int getLayoutType(java.lang.String ls)

Get the layout type enumerated in Page

Specified by:

getLayoutType in interface ILayoutHelper

Parameters:

ls - the layout style

Returns:

the type id

getLayoutClass

public java.lang.String getLayoutClass(java.lang.Object layout)

Get the layout type

Specified by:

getLayoutClass in interface ILayoutHelper

Parameters:

layout - the layout manager instance

Returns:

the type name e.g. FLOW or BORDER

getUsesConstraints

public boolean getUsesConstraints(java.lang.Object layout)

Does the layout manager use constraints for its children?

Specified by:

getUsesConstraints in interface ILayoutHelper

Parameters:

layout - the layout manager instance

Returns:

true if the layout uses constraints

getUsesDimensions

public boolean getUsesDimensions(java.lang.Object layout)

Does this layout manager used the absoulte dimensions?

Specified by:

getUsesDimensions in interface ILayoutHelper

Parameters:

layout - the layout manager instance

Returns:

true if the X,Y,W,H dimensions are used

getConstraint

public java.lang.Object getConstraint(java.lang.String name)

Gets a constraint object corresponding to a constraint name

Specified by:

getConstraint in interface ILayoutHelper

Parameters:

name - the quoted constraint name e.g. "WEST"

• WEST=BorderLayout.WEST
• EAST=BorderLayout.EAST
• NORTH=BorderLayout.NORTH
• SOUTH=BorderLayout.SOUTH
• CENTER=BorderLayout.CENTER
• AFTER_LAST_LINE=BorderLayout.AFTER_LAST_LINE
• AFTER_LINE_ENDS=BorderLayout.AFTER_LINE_ENDS
• BEFORE_FIRST_LINE=BorderLayout.BEFORE_FIRST_LINE
• BEFORE_LINE_BEGINS=BorderLayout.BEFORE_LINE_BEGINS
• GridBagConstraints=14 GridBagConstraint parameters separated by commas
  1. gridx - The initial gridx value
  2. gridy - The initial gridy value.
  3. gridwidth - The initial gridwidth value.
  4. gridheight - The initial gridheight value.
  5. weightx - The initial weightx value.
  6. weighty - The initial weighty value.
  7. anchorstr - The anchor string value (EAST|WEST|NORTH|SOUTH|NORTHEAST|NORTHWEST|SOUTHEAST|SOUTHWEST)
  8. fillstr - The fill string value (HORIZONTAL|VERTICAL)
  9. insets top - The initial inset
  10. insets left - The initial inset
  11. insets right - The initial inset
  12. insets bottom - The initial inset
  13. ipadx - The initial ipadx value
  14. ipady - The initial ipady value

Returns:

the constraint object

getIntAttrib

protected int getIntAttrib(java.util.Hashtable attribs,
                           java.lang.String attrib)

Get an attribute as an int value

Parameters:

attribs - the attribs hashtable

attrib - the attribute key

Returns:

the integer value

setAttrib

public void setAttrib(java.lang.Object cont,
                      java.lang.Object lm,
                      java.lang.String attrib,
                      java.lang.Object value)

Set the attributes for a layout manager

Specified by:

setAttrib in interface ILayoutHelper

Parameters:

cont - the container

lm - the layout manager

attrib - the attribute name

value - the value of the attribute

getBoxAlignment

protected java.lang.Integer getBoxAlignment(java.lang.String value)

Convert an attribute value to the equivalent BoxLayout constant, defaults to x-axis if not found.

Parameters:

value - the attribute value specifying the alignment

Returns:

the equivalent BoxLayout integer constant