Spec-Zone .ru
спецификации, руководства, описания, API
|
|
Java™ Platform Standard Ed. 6 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
public interface AttributeSet
A collection of unique attributes. This is a read-only, immutable interface. An attribute is basically a key and a value assigned to the key. The collection may represent something like a style run, a logical style, etc. These are generally used to describe features that will contribute to some graphical representation such as a font. The set of possible keys is unbounded and can be anything. Typically View implementations will respond to attribute definitions and render something to represent the attributes.
Attributes can potentially resolve in a hierarchy. If a key doesn't resolve locally, and a resolving parent exists, the key will be resolved through the parent.
MutableAttributeSet
Nested Class Summary | |
---|---|
static interface |
AttributeSet.CharacterAttribute
This interface is the type signature that is expected to be present on any attribute key that contributes to character level presentation. |
static interface |
AttributeSet.ColorAttribute
This interface is the type signature that is expected to be present on any attribute key that contributes to presentation of color. |
static interface |
AttributeSet.FontAttribute
This interface is the type signature that is expected to be present on any attribute key that contributes to the determination of what font to use to render some text. |
static interface |
AttributeSet.ParagraphAttribute
This interface is the type signature that is expected to be present on any attribute key that contributes to the paragraph level presentation. |
Field Summary | |
---|---|
static Object |
NameAttribute
Attribute name used to name the collection of attributes. |
static Object |
ResolveAttribute
Attribute name used to identify the resolving parent set of attributes, if one is defined. |
Method Summary | |
---|---|
boolean |
containsAttribute(Object name,
Object value)
Returns true if this set defines an attribute with the same
name and an equal value. |
boolean |
containsAttributes(AttributeSet attributes)
Returns true if this set defines all the attributes from the
given set with equal values. |
AttributeSet |
copyAttributes()
Returns an attribute set that is guaranteed not to change over time. |
Object |
getAttribute(Object key)
Fetches the value of the given attribute. |
int |
getAttributeCount()
Returns the number of attributes that are defined locally in this set. |
Enumeration<?> |
getAttributeNames()
Returns an enumeration over the names of the attributes that are defined locally in the set. |
AttributeSet |
getResolveParent()
Gets the resolving parent. |
boolean |
isDefined(Object attrName)
Checks whether the named attribute has a value specified in the set without resolving through another attribute set. |
boolean |
isEqual(AttributeSet attr)
Determines if the two attribute sets are equivalent. |
Field Detail |
---|
static final Object NameAttribute
static final Object ResolveAttribute
Method Detail |
---|
int getAttributeCount()
boolean isDefined(Object attrName)
attrName
- the attribute name
boolean isEqual(AttributeSet attr)
attr
- an attribute set
AttributeSet copyAttributes()
Object getAttribute(Object key)
key
- the non-null key of the attribute binding
Enumeration<?> getAttributeNames()
Enumeration
may be anything and are not constrained to
a particular Object
type.
This method never returns null
. For a set with no attributes, it
returns an empty Enumeration
.
boolean containsAttribute(Object name, Object value)
true
if this set defines an attribute with the same
name and an equal value. If such an attribute is not found locally,
it is searched through in the resolving parent hierarchy.
name
- the non-null attribute namevalue
- the value
true
if the set defines the attribute with an
equal value, either locally or through its resolving parent
NullPointerException
- if either name
or
value
is null
boolean containsAttributes(AttributeSet attributes)
true
if this set defines all the attributes from the
given set with equal values. If an attribute is not found locally,
it is searched through in the resolving parent hierarchy.
attributes
- the set of attributes to check against
true
if this set defines all the attributes with equal
values, either locally or through its resolving parent
NullPointerException
- if attributes
is null
AttributeSet getResolveParent()
|
Java™ Platform Standard Ed. 6 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the