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Class semper.preferences.PrefGroup 

java.lang.Object
   |
   +----semper.preferences.PrefGroup
public class PrefGroup
extends Object
implements Serializable
This class represents a preferences group object. A group is a collection of fields. This class offered services for fields manipulation.

Version:
$Revision: 1.19 $ $Date: 1997/09/26 16:29:36 $
Author:
Louis Salvail (CWI)
See Also:
PrefField

Variable Index

o groupName

Constructor Index

o PrefGroup()
preferences constructor used by newInstance().
o PrefGroup(String, String)
preferences constructor.

Method Index

o cancel()
Cancel user's modifications by setting each field back to their intial value.
o delField(String)
Delete a particular field of the current group.
o fieldsList()
Returns every field's name in this group.
o get(String)
Gets a particular field of this group.
o getLabel()
Gives the label for that group.
o getName()
Gives the name of that group.
o isModified()
Returns true if a field has been modified since last update.
o numberOfFields()
Return the number of Fields in the group.
o put(PrefField)
Adds a field to this group.
o showme(PrefFrame)
This method adds to a frame the components of the group.
o update()
Apply the modification when the changes in a group are done.

Variables

o groupName 
 public String groupName

Constructors

o PrefGroup 
 public PrefGroup(String groupname,
                  String withlabel)
preferences constructor.

Parameters:
name - is the reference name of that group with respect to the preferences manager interface.
withlabel - is the label appearing on display to refer to that group.
Returns:
The new empty group with the wanted name and label.
o PrefGroup 
 public PrefGroup()
preferences constructor used by newInstance(). This make nothing.

Returns:
empty object

Methods

o getName 
 public String getName()
Gives the name of that group.

Returns:
the stringname.
o getLabel 
 public String getLabel()
Gives the label for that group.

Returns:
the string representing the label.
o numberOfFields 
 public int numberOfFields()
Return the number of Fields in the group.

Returns:
the number of fields in this group.
o fieldsList 
 public Enumeration fieldsList()
Returns every field's name in this group.

Returns:
Enumeration of fields.
o put 
 public PrefField put(PrefField field)
Adds a field to this group.

Parameters:
field - is the PrefField object to be added.
Returns:
Null if that fieldname is new, return the previous field otherwise.
o get 
 public PrefField get(String fieldName)
Gets a particular field of this group.

Parameters:
fieldName - is the name of the field to get.
Returns:
the field if exists and null otherwise.
o delField 
 public PrefField delField(String fieldName)
Delete a particular field of the current group.

Parameters:
fieldName - is the name of the field to delete.
Returns:
the field object if exists and null otherwise.
o showme 
 public void showme(PrefFrame p)
This method adds to a frame the components of the group.

Parameters:
p - is the frame on which the components are added.
Returns:
none.
o isModified 
 public boolean isModified()
Returns true if a field has been modified since last update.

Returns:
true iff there exists a field modified.
o update 
 public boolean update()
Apply the modification when the changes in a group are done. The modification are performed only for field having a isOk = true value. Each newly modified field is notified to each of its resgistered peer.

Returns:
true if all fields have a correct value, false otherwise.
See Also:
PrefField, PrefNotify
o cancel 
 public void cancel()
Cancel user's modifications by setting each field back to their intial value.

Returns:
none. 
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