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.
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
Returns true if this set ![]() ![]() ![]() |
boolean |
containsAttributes
(
AttributeSet
Returns true if this set ![]() ![]() ![]() |
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 ![]() ![]() |
Enumeration |
getAttributeNames
() Returns an enumeration over the names of the attributes ![]() |
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)
boolean isEqual(AttributeSet attr)
AttributeSet copyAttributes()
Object getAttribute(Object key)
Enumeration<?> getAttributeNames()
This method never returns null. For a set with no attributes, it returns an empty Enumeration.
boolean containsAttribute(Object name, Object value)
boolean containsAttributes(AttributeSet attributes)
AttributeSet getResolveParent()