Java Reference
In-Depth Information
Table 15-1.
JTextComponent Properties (Continued)
Property Name
Data Type
Access
selectedText
String
Read-only
selectedTextColor
Color
Read-write bound
selectionColor
Color
Read-write bound
selectionEnd
int
Read-write
selectionStart
int
Read-write
text
String
Read-write
UI
TextUI
Read-write
These properties can be grouped into eight basic categories:
Data model:
The
document
property is for the data model of all text components. The
text
property is used for treating this data model as a
String
.
•
•
Color:
The
caretColor
,
disabledTextColor
,
selectedTextColor
, and
selectionColor
properties, as well as the inherited
foreground
and
background
properties, specify the
color for rendering the cursor, disabled text, selected text, selected text background,
regular text, and regular text background.
Caret:
The
caret
,
caretPosition
, and
navigationFilter
properties are for navigating
through the document.
•
Highlighter:
The
highlighter
,
selectionStart
, and
selectionEnd
properties are responsible
for highlighting the
selectedText
section of the document.
•
Margin:
The
margin
property is for specifying how far the text contents appear from the
edges of the text component.
•
Events:
The
actions
and
keymap
properties describe which capabilities the text compo-
nent supports. In the case of the
Action[ ]
for the
actions
property, the capabilities are
a series of
ActionListener
implementations that you can associate with components for
event handling. For instance, instead of creating an
ActionListener
to perform cut, copy,
and paste operations, you find the appropriate
Action
within the
actions
property and
associate it with a component. The
keymap
property works in a similar manner, but it
associates
Action
implementations with specific keys. For instance, it contains a key
map entry for what to do when the PageUp key is pressed. The
caretListeners
property
allows you to discover the set of
CaretListener
objects observing the text component.
The
dragEnabled
setting describes if the component supports dragging text from within
the component. (For information about drag-and-drop support within Swing, see
Chapter 19.)
•
•
Scrollable interface:
The properties
preferredScrollableViewportSize
,
scrollableTracksViewportHeight
, and
scrollableTracksViewportWidth
are
implementations of the respective
Scrollable
interface methods.
