Some utility methods for working with text.
calculateRotatedStringBounds
public static Shape calculateRotatedStringBounds(String text,
Graphics2D g2,
float textX,
float textY,
double angle,
float rotateX,
float rotateY)
Returns a shape that represents the bounds of the string after the
specified rotation has been applied.
text
- the text (null
permitted).g2
- the graphics device.textX
- the x coordinate for the text.textY
- the y coordinate for the text.angle
- the angle.rotateX
- the x coordinate for the rotation point.rotateY
- the y coordinate for the rotation point.
- The bounds (
null
if text
is
null or has zero length).
calculateRotatedStringBounds
public static Shape calculateRotatedStringBounds(String text,
Graphics2D g2,
float x,
float y,
TextAnchor textAnchor,
double angle,
TextAnchor rotationAnchor)
Returns a shape that represents the bounds of the string after the
specified rotation has been applied.
text
- the text (null
permitted).g2
- the graphics device.x
- the x coordinate for the anchor point.y
- the y coordinate for the anchor point.textAnchor
- the text anchor.angle
- the angle.rotationAnchor
- the rotation anchor.
- The bounds (possibly
null
).
createTextBlock
public static TextBlock createTextBlock(String text,
Font font,
Paint paint)
Creates a
TextBlock
from a
String
. Line breaks
are added where the
String
contains '\n' characters.
text
- the text.font
- the font.paint
- the paint.
createTextBlock
public static TextBlock createTextBlock(String text,
Font font,
Paint paint,
float maxWidth,
int maxLines,
TextMeasurer measurer)
Creates a new text block from the given string, breaking the
text into lines so that the maxWidth
value is
respected.
text
- the text.font
- the font.paint
- the paint.maxWidth
- the maximum width for each line.maxLines
- the maximum number of lines.measurer
- the text measurer.
createTextBlock
public static TextBlock createTextBlock(String text,
Font font,
Paint paint,
float maxWidth,
TextMeasurer measurer)
Creates a new text block from the given string, breaking the
text into lines so that the maxWidth
value is
respected.
text
- the text.font
- the font.paint
- the paint.maxWidth
- the maximum width for each line.measurer
- the text measurer.
drawAlignedString
public static Rectangle2D drawAlignedString(String text,
Graphics2D g2,
float x,
float y,
TextAnchor anchor)
Draws a string such that the specified anchor point is aligned to the
given (x, y) location.
text
- the text.g2
- the graphics device.x
- the x coordinate (Java 2D).y
- the y coordinate (Java 2D).anchor
- the anchor location.
- The text bounds (adjusted for the text position).
drawRotatedString
public static void drawRotatedString(String text,
Graphics2D g2,
double angle,
float x,
float y)
A utility method for drawing rotated text.
A common rotation is -Math.PI/2 which draws text 'vertically' (with the
top of the characters on the left).
text
- the text.g2
- the graphics device.angle
- the angle of the (clockwise) rotation (in radians).x
- the x-coordinate.y
- the y-coordinate.
drawRotatedString
public static void drawRotatedString(String text,
Graphics2D g2,
float textX,
float textY,
double angle,
float rotateX,
float rotateY)
A utility method for drawing rotated text.
A common rotation is -Math.PI/2 which draws text 'vertically' (with the
top of the characters on the left).
text
- the text.g2
- the graphics device.textX
- the x-coordinate for the text (before rotation).textY
- the y-coordinate for the text (before rotation).angle
- the angle of the (clockwise) rotation (in radians).rotateX
- the point about which the text is rotated.rotateY
- the point about which the text is rotated.
drawRotatedString
public static void drawRotatedString(String text,
Graphics2D g2,
float x,
float y,
TextAnchor textAnchor,
double angle,
float rotationX,
float rotationY)
Draws a string that is aligned by one anchor point and rotated about
another anchor point.
text
- the text.g2
- the graphics device.x
- the x-coordinate for positioning the text.y
- the y-coordinate for positioning the text.textAnchor
- the text anchor.angle
- the rotation angle.rotationX
- the x-coordinate for the rotation anchor point.rotationY
- the y-coordinate for the rotation anchor point.
drawRotatedString
public static void drawRotatedString(String text,
Graphics2D g2,
float x,
float y,
TextAnchor textAnchor,
double angle,
TextAnchor rotationAnchor)
Draws a string that is aligned by one anchor point and rotated about
another anchor point.
text
- the text.g2
- the graphics device.x
- the x-coordinate for positioning the text.y
- the y-coordinate for positioning the text.textAnchor
- the text anchor.angle
- the rotation angle (in radians).rotationAnchor
- the rotation anchor.
getTextBounds
public static Rectangle2D getTextBounds(String text,
Graphics2D g2,
FontMetrics fm)
Returns the bounds for the specified text.
text
- the text (null
permitted).g2
- the graphics context (not null
).fm
- the font metrics (not null
).
- The text bounds (
null
if the text
argument is null
).
getUseFontMetricsGetStringBounds
public static boolean getUseFontMetricsGetStringBounds()
Returns the flag that controls whether the FontMetrics.getStringBounds()
method is used or not. If you are having trouble with label alignment
or positioning, try changing the value of this flag.
setUseDrawRotatedStringWorkaround
public static void setUseDrawRotatedStringWorkaround(boolean use)
Sets the flag that controls whether or not a workaround is used for
drawing rotated strings. The related bug is on Sun's bug parade
(id 4312117) and the workaround involves using a TextLayout
instance to draw the text instead of calling the
drawString()
method in the Graphics2D
class.
use
- the new flag value.
setUseFontMetricsGetStringBounds
public static void setUseFontMetricsGetStringBounds(boolean use)
Sets the flag that controls whether the FontMetrics.getStringBounds()
method is used or not. If you are having trouble with label alignment
or positioning, try changing the value of this flag.