javax.swing.text
public class Utilities extends Object
| Constructor Summary | |
|---|---|
| Utilities()
Creates a new Utilities object. | |
| Method Summary | |
|---|---|
| static int | drawTabbedText(Segment s, int x, int y, Graphics g, TabExpander e, int startOffset)
Draws the given text segment. |
| static int | getBreakLocation(Segment s, FontMetrics metrics, int x0, int x, TabExpander e, int startOffset)
Determine where to break the text in the given Segment, attempting to find
a word boundary. |
| static int | getNextWord(JTextComponent c, int offs)
Finds the start of the next word for the given offset.
|
| static Element | getParagraphElement(JTextComponent c, int offset)
Returns the paragraph element in the text component c at
the specified location offset.
|
| static int | getPositionAbove(JTextComponent c, int offset, int x)
Returns the document position that is closest above to the specified x
coordinate in the row containing offset.
|
| static int | getPositionBelow(JTextComponent c, int offset, int x)
Returns the document position that is closest below to the specified x
coordinate in the row containing offset.
|
| static int | getPreviousWord(JTextComponent c, int offs)
Finds the start of the previous word for the given offset.
|
| static int | getRowEnd(JTextComponent c, int offs)
Get the model position of the end of the row that contains the
specified model position. |
| static int | getRowStart(JTextComponent c, int offs)
Get the model position of the start of the row that contains the specified
model position. |
| static int | getTabbedTextOffset(Segment s, FontMetrics fm, int x0, int x, TabExpander te, int p0, boolean round)
Provides a facility to map screen coordinates into a model location. |
| static int | getTabbedTextOffset(Segment s, FontMetrics fm, int x0, int x, TabExpander te, int p0)
Provides a facility to map screen coordinates into a model location. |
| static int | getTabbedTextWidth(Segment s, FontMetrics metrics, int x, TabExpander e, int startOffset)
Determines the width, that the given text s would take
if it was printed with the given {@link java.awt.FontMetrics} on the
specified screen position. |
| static int | getWordEnd(JTextComponent c, int offs)
Finds the end of a word for the given location. |
| static int | getWordStart(JTextComponent c, int offs)
Finds the start of a word for the given location. |
Utilities object.Parameters: s the text fragment to be drawn. x the x position for drawing. y the y position for drawing. g the {@link Graphics} context for drawing. e the {@link TabExpander} which specifies the Tab-expanding technique. startOffset starting offset in the text.
Returns: the x coordinate at the end of the drawn text.
Parameters: s the Segment that holds the text metrics the font metrics used for calculating the break point x0 starting view location representing the start of the text x the target view location e the TabExpander used for expanding tabs (if this is null tabs are expanded to 1 space) startOffset the offset in the Document of the start of the text
Returns: the offset at which we should break the text
Parameters: c the text component offs the offset in the document
Returns: the location in the model of the start of the next word.
Throws: BadLocationException if the offset is invalid.
c at
the specified location offset.
Parameters: c the text component offset the offset of the paragraph element to return
Returns: the paragraph element at offset
offset.
Parameters: c the text component offset the offset x the x coordinate
Returns: the document position that is closest above to the specified x
coordinate in the row containing offset
Throws: BadLocationException if offset is not a valid offset
offset.
Parameters: c the text component offset the offset x the x coordinate
Returns: the document position that is closest above to the specified x
coordinate in the row containing offset
Throws: BadLocationException if offset is not a valid offset
Parameters: c the text component offs the offset in the document
Returns: the location in the model of the start of the previous word.
Throws: BadLocationException if the offset is invalid.
Parameters: c the JTextComponent offs the model position
Returns: the model position of the end of the row containing the given offset
Throws: BadLocationException if the offset is invalid
Parameters: c the JTextComponent offs the model position
Returns: the model position of the start of the row containing the given offset
Throws: BadLocationException if the offset is invalid
[x0, x].
The parameter round controls which model location is returned
if the view coordinates are on a character: If round is
true, then the result is rounded up to the next character, so
that the resulting fragment is the smallest fragment that is larger than
the specified span. If round is false, then the
resulting fragment is the largest fragment that is smaller than the
specified span.
Parameters: s the text segment fm the font metrics to use x0 the starting screen location x the target screen location at which the requested fragment should
end te the tab expander to use; if this is null, TABs are
expanded to one space character p0 the starting model location round if true round up to the next location, otherwise
round down to the current location
Returns: the model location, so that the resulting fragment fits within the specified span
[x0, x].
This method rounds up to the next location, so that the resulting fragment
will be the smallest fragment of the text, that is greater than the
specified span.
Parameters: s the text segment fm the font metrics to use x0 the starting screen location x the target screen location at which the requested fragment should
end te the tab expander to use; if this is null, TABs are
expanded to one space character p0 the starting model location
Returns: the model location, so that the resulting fragment fits within the specified span
s would take
if it was printed with the given {@link java.awt.FontMetrics} on the
specified screen position.Parameters: s the text fragment metrics the font metrics of the font to be used x the x coordinate of the point at which drawing should be done e the {@link TabExpander} to be used startOffset the index in s where to start
UNKNOWN: the width of the given text s. This takes tabs and newlines into account.
Parameters: c the text component offs the offset location
Returns: the location of the word end
Throws: BadLocationException if the offset location is invalid
Parameters: c the text component offs the offset location
Returns: the location of the word beginning
Throws: BadLocationException if the offset location is invalid