- java.lang.Object
-
- java.awt.GradientPaint
-
- All Implemented Interfaces:
- Paint, Transparency
public class GradientPaint extends Object implements Paint
TheGradientPaint
class provides a way to fill aShape
with a linear color gradient pattern. IfPoint
P1 withColor
C1 andPoint
P2 withColor
C2 are specified in user space, theColor
on the P1, P2 connecting line is proportionally changed from C1 to C2. Any point P not on the extended P1, P2 connecting line has the color of the point P' that is the perpendicular projection of P on the extended P1, P2 connecting line. Points on the extended line outside of the P1, P2 segment can be colored in one of two ways.- If the gradient is cyclic then the points on the extended P1, P2 connecting line cycle back and forth between the colors C1 and C2.
-
If the gradient is acyclic then points on the P1 side of the segment
have the constant
Color
C1 while points on the P2 side have the constantColor
C2.
- See Also:
Paint
,Graphics2D.setPaint(java.awt.Paint)
-
-
Field Summary
-
Fields inherited from interface java.awt.Transparency
BITMASK, OPAQUE, TRANSLUCENT
-
-
Constructor Summary
Constructors Constructor and Description GradientPaint(float x1, float y1, Color color1, float x2, float y2, Color color2)
Constructs a simple acyclicGradientPaint
object.GradientPaint(float x1, float y1, Color color1, float x2, float y2, Color color2, boolean cyclic)
Constructs either a cyclic or acyclicGradientPaint
object depending on theboolean
parameter.GradientPaint(Point2D pt1, Color color1, Point2D pt2, Color color2)
Constructs a simple acyclicGradientPaint
object.GradientPaint(Point2D pt1, Color color1, Point2D pt2, Color color2, boolean cyclic)
Constructs either a cyclic or acyclicGradientPaint
object depending on theboolean
parameter.
-
Method Summary
Methods Modifier and Type Method and Description PaintContext
createContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds, AffineTransform xform, RenderingHints hints)
Creates and returns aPaintContext
used to generate a linear color gradient pattern.Color
getColor1()
Returns the color C1 anchored by the point P1.Color
getColor2()
Returns the color C2 anchored by the point P2.Point2D
getPoint1()
Returns a copy of the point P1 that anchors the first color.Point2D
getPoint2()
Returns a copy of the point P2 which anchors the second color.int
getTransparency()
Returns the transparency mode for thisGradientPaint
.boolean
isCyclic()
Returnstrue
if the gradient cycles repeatedly between the two colors C1 and C2.
-
-
-
Constructor Detail
-
GradientPaint
public GradientPaint(float x1, float y1, Color color1, float x2, float y2, Color color2)
Constructs a simple acyclicGradientPaint
object.- Parameters:
x1
- x coordinate of the first specifiedPoint
in user spacey1
- y coordinate of the first specifiedPoint
in user spacecolor1
-Color
at the first specifiedPoint
x2
- x coordinate of the second specifiedPoint
in user spacey2
- y coordinate of the second specifiedPoint
in user spacecolor2
-Color
at the second specifiedPoint
- Throws:
NullPointerException
- if either one of colors is null
-
GradientPaint
public GradientPaint(Point2D pt1, Color color1, Point2D pt2, Color color2)
Constructs a simple acyclicGradientPaint
object.- Parameters:
pt1
- the first specifiedPoint
in user spacecolor1
-Color
at the first specifiedPoint
pt2
- the second specifiedPoint
in user spacecolor2
-Color
at the second specifiedPoint
- Throws:
NullPointerException
- if either one of colors or points is null
-
GradientPaint
public GradientPaint(float x1, float y1, Color color1, float x2, float y2, Color color2, boolean cyclic)
Constructs either a cyclic or acyclicGradientPaint
object depending on theboolean
parameter.- Parameters:
x1
- x coordinate of the first specifiedPoint
in user spacey1
- y coordinate of the first specifiedPoint
in user spacecolor1
-Color
at the first specifiedPoint
x2
- x coordinate of the second specifiedPoint
in user spacey2
- y coordinate of the second specifiedPoint
in user spacecolor2
-Color
at the second specifiedPoint
cyclic
-true
if the gradient pattern should cycle repeatedly between the two colors;false
otherwise
-
GradientPaint
@ConstructorProperties(value={"point1","color1","point2","color2","cyclic"}) public GradientPaint(Point2D pt1, Color color1, Point2D pt2, Color color2, boolean cyclic)
Constructs either a cyclic or acyclicGradientPaint
object depending on theboolean
parameter.- Parameters:
pt1
- the first specifiedPoint
in user spacecolor1
-Color
at the first specifiedPoint
pt2
- the second specifiedPoint
in user spacecolor2
-Color
at the second specifiedPoint
cyclic
-true
if the gradient pattern should cycle repeatedly between the two colors;false
otherwise- Throws:
NullPointerException
- if either one of colors or points is null
-
-
Method Detail
-
getPoint1
public Point2D getPoint1()
Returns a copy of the point P1 that anchors the first color.- Returns:
- a
Point2D
object that is a copy of the point that anchors the first color of thisGradientPaint
.
-
getColor1
public Color getColor1()
Returns the color C1 anchored by the point P1.- Returns:
- a
Color
object that is the color anchored by P1.
-
getPoint2
public Point2D getPoint2()
Returns a copy of the point P2 which anchors the second color.- Returns:
- a
Point2D
object that is a copy of the point that anchors the second color of thisGradientPaint
.
-
getColor2
public Color getColor2()
Returns the color C2 anchored by the point P2.- Returns:
- a
Color
object that is the color anchored by P2.
-
isCyclic
public boolean isCyclic()
Returnstrue
if the gradient cycles repeatedly between the two colors C1 and C2.- Returns:
true
if the gradient cycles repeatedly between the two colors;false
otherwise.
-
createContext
public PaintContext createContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds, AffineTransform xform, RenderingHints hints)
Creates and returns aPaintContext
used to generate a linear color gradient pattern. See thespecification
of the method in thePaint
interface for information on null parameter handling.- Specified by:
createContext
in interfacePaint
- Parameters:
cm
- the preferredColorModel
which represents the most convenient format for the caller to receive the pixel data, ornull
if there is no preference.deviceBounds
- the device space bounding box of the graphics primitive being rendered.userBounds
- the user space bounding box of the graphics primitive being rendered.xform
- theAffineTransform
from user space into device space.hints
- the set of hints that the context object can use to choose between rendering alternatives.- Returns:
- the
PaintContext
for generating color patterns. - See Also:
Paint
,PaintContext
,ColorModel
,Rectangle
,Rectangle2D
,AffineTransform
,RenderingHints
-
getTransparency
public int getTransparency()
Returns the transparency mode for thisGradientPaint
.- Specified by:
getTransparency
in interfaceTransparency
- Returns:
- an integer value representing this
GradientPaint
object's transparency mode. - See Also:
Transparency
-
-
Traduction non disponible
Les API Java ne sont pas encore traduites en français sur l'infobrol. Seule la version anglaise est disponible pour l'instant.
Version en cache
21/11/2024 21:36:24 Cette version de la page est en cache (à la date du 21/11/2024 21:36:24) afin d'accélérer le traitement. Vous pouvez activer le mode utilisateur dans le menu en haut pour afficher la dernère version de la page.Document créé le 29/08/2006, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-java/awt/gradientpaint.html
L'infobrol est un site personnel dont le contenu n'engage que moi. Le texte est mis à disposition sous licence CreativeCommons(BY-NC-SA). Plus d'info sur les conditions d'utilisation et sur l'auteur.
Références
Ces références et liens indiquent des documents consultés lors de la rédaction de cette page, ou qui peuvent apporter un complément d'information, mais les auteurs de ces sources ne peuvent être tenus responsables du contenu de cette page.
L'auteur de ce site est seul responsable de la manière dont sont présentés ici les différents concepts, et des libertés qui sont prises avec les ouvrages de référence. N'oubliez pas que vous devez croiser les informations de sources multiples afin de diminuer les risques d'erreurs.