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Java example source code file (PeekGraphics.java)
This example Java source code file (PeekGraphics.java) is included in the alvinalexander.com
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The PeekGraphics.java Java example source code
/*
* Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.print;
import java.util.Map;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.font.FontRenderContext;
import java.awt.Graphics;
import java.awt.GraphicsConfiguration;
import java.awt.Image;
import java.awt.Paint;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.RenderingHints;
import java.awt.RenderingHints.Key;
import java.awt.font.GlyphVector;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ImageObserver;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.RenderableImage;
import java.awt.print.PrinterGraphics;
import java.awt.print.PrinterJob;
import java.text.AttributedCharacterIterator;
import sun.java2d.Spans;
public class PeekGraphics extends Graphics2D
implements PrinterGraphics,
ImageObserver,
Cloneable {
/**
* Drawing methods will be forwarded to this object.
*/
Graphics2D mGraphics;
/**
* The PrinterJob controlling the current printing.
*/
PrinterJob mPrinterJob;
/**
* Keeps track of where drawing occurs on the page.
*/
private Spans mDrawingArea = new Spans();
/**
* Track information about the types of drawing
* performed by the printing application.
*/
private PeekMetrics mPrintMetrics = new PeekMetrics();
/**
* If true the application will only be drawing AWT style
* graphics, no Java2D graphics.
*/
private boolean mAWTDrawingOnly = false;
/**
* The new PeekGraphics2D will forward state changing
* calls to 'graphics'. 'printerJob' is stored away
* so that the printing application can get the PrinterJob
* if needed.
*/
public PeekGraphics(Graphics2D graphics, PrinterJob printerJob) {
mGraphics = graphics;
mPrinterJob = printerJob;
}
/**
* Return the Graphics2D object that does the drawing
* for this instance.
*/
public Graphics2D getDelegate() {
return mGraphics;
}
/**
* Set the Graphics2D instance which will do the
* drawing.
*/
public void setDelegate(Graphics2D graphics) {
mGraphics = graphics;
}
public PrinterJob getPrinterJob() {
return mPrinterJob;
}
/**
* The caller promises that only AWT graphics will be drawn.
* The print system can use this information to make general
* assumptions about the types of graphics to be drawn without
* requiring the application to draw the contents multiple
* times.
*/
public void setAWTDrawingOnly() {
mAWTDrawingOnly = true;
}
public boolean getAWTDrawingOnly() {
return mAWTDrawingOnly;
}
/**
* Return a Spans instance describing the parts of the page in
* to which drawing occurred.
*/
public Spans getDrawingArea() {
return mDrawingArea;
}
/**
* Returns the device configuration associated with this Graphics2D.
*/
public GraphicsConfiguration getDeviceConfiguration() {
return ((RasterPrinterJob)mPrinterJob).getPrinterGraphicsConfig();
}
/* The Delegated Graphics Methods */
/**
* Creates a new <code>Graphics object that is
* a copy of this <code>Graphics object.
* @return a new graphics context that is a copy of
* this graphics context.
* @since JDK1.0
*/
public Graphics create() {
PeekGraphics newGraphics = null;
try {
newGraphics = (PeekGraphics) clone();
newGraphics.mGraphics = (Graphics2D) mGraphics.create();
/* This exception can not happen unless this
* class no longer implements the Cloneable
* interface.
*/
} catch (CloneNotSupportedException e) {
// can never happen.
}
return newGraphics;
}
/**
* Translates the origin of the graphics context to the point
* (<i>x, y) in the current coordinate system.
* Modifies this graphics context so that its new origin corresponds
* to the point (<i>x, y) in this graphics context's
* original coordinate system. All coordinates used in subsequent
* rendering operations on this graphics context will be relative
* to this new origin.
* @param x the <i>x coordinate.
* @param y the <i>y coordinate.
* @since JDK1.0
*/
public void translate(int x, int y) {
mGraphics.translate(x, y);
}
/**
* Concatenates the current transform of this Graphics2D with a
* translation transformation.
* This is equivalent to calling transform(T), where T is an
* AffineTransform represented by the following matrix:
* <pre>
* [ 1 0 tx ]
* [ 0 1 ty ]
* [ 0 0 1 ]
* </pre>
*/
public void translate(double tx, double ty) {
mGraphics.translate(tx, ty);
}
/**
* Concatenates the current transform of this Graphics2D with a
* rotation transformation.
* This is equivalent to calling transform(R), where R is an
* AffineTransform represented by the following matrix:
* <pre>
* [ cos(theta) -sin(theta) 0 ]
* [ sin(theta) cos(theta) 0 ]
* [ 0 0 1 ]
* </pre>
* Rotating with a positive angle theta rotates points on the positive
* x axis toward the positive y axis.
* @param theta The angle of rotation in radians.
*/
public void rotate(double theta) {
mGraphics.rotate(theta);
}
/**
* Concatenates the current transform of this Graphics2D with a
* translated rotation transformation.
* This is equivalent to the following sequence of calls:
* <pre>
* translate(x, y);
* rotate(theta);
* translate(-x, -y);
* </pre>
* Rotating with a positive angle theta rotates points on the positive
* x axis toward the positive y axis.
* @param theta The angle of rotation in radians.
* @param x The x coordinate of the origin of the rotation
* @param y The x coordinate of the origin of the rotation
*/
public void rotate(double theta, double x, double y) {
mGraphics.rotate(theta, x, y);
}
/**
* Concatenates the current transform of this Graphics2D with a
* scaling transformation.
* This is equivalent to calling transform(S), where S is an
* AffineTransform represented by the following matrix:
* <pre>
* [ sx 0 0 ]
* [ 0 sy 0 ]
* [ 0 0 1 ]
* </pre>
*/
public void scale(double sx, double sy) {
mGraphics.scale(sx, sy);
}
/**
* Concatenates the current transform of this Graphics2D with a
* shearing transformation.
* This is equivalent to calling transform(SH), where SH is an
* AffineTransform represented by the following matrix:
* <pre>
* [ 1 shx 0 ]
* [ shy 1 0 ]
* [ 0 0 1 ]
* </pre>
* @param shx The factor by which coordinates are shifted towards the
* positive X axis direction according to their Y coordinate
* @param shy The factor by which coordinates are shifted towards the
* positive Y axis direction according to their X coordinate
*/
public void shear(double shx, double shy) {
mGraphics.shear(shx, shy);
}
/**
* Gets this graphics context's current color.
* @return this graphics context's current color.
* @see java.awt.Color
* @see java.awt.Graphics#setColor
* @since JDK1.0
*/
public Color getColor() {
return mGraphics.getColor();
}
/**
* Sets this graphics context's current color to the specified
* color. All subsequent graphics operations using this graphics
* context use this specified color.
* @param c the new rendering color.
* @see java.awt.Color
* @see java.awt.Graphics#getColor
* @since JDK1.0
*/
public void setColor(Color c) {
mGraphics.setColor(c);
}
/**
* Sets the paint mode of this graphics context to overwrite the
* destination with this graphics context's current color.
* This sets the logical pixel operation function to the paint or
* overwrite mode. All subsequent rendering operations will
* overwrite the destination with the current color.
* @since JDK1.0
*/
public void setPaintMode() {
mGraphics.setPaintMode();
}
/**
* Sets the paint mode of this graphics context to alternate between
* this graphics context's current color and the new specified color.
* This specifies that logical pixel operations are performed in the
* XOR mode, which alternates pixels between the current color and
* a specified XOR color.
* <p>
* When drawing operations are performed, pixels which are the
* current color are changed to the specified color, and vice versa.
* <p>
* Pixels that are of colors other than those two colors are changed
* in an unpredictable but reversible manner; if the same figure is
* drawn twice, then all pixels are restored to their original values.
* @param c1 the XOR alternation color
* @since JDK1.0
*/
public void setXORMode(Color c1) {
mGraphics.setXORMode(c1);
}
/**
* Gets the current font.
* @return this graphics context's current font.
* @see java.awt.Font
* @see java.awt.Graphics#setFont
* @since JDK1.0
*/
public Font getFont() {
return mGraphics.getFont();
}
/**
* Sets this graphics context's font to the specified font.
* All subsequent text operations using this graphics context
* use this font.
* @param font the font.
* @see java.awt.Graphics#getFont
* @see java.awt.Graphics#drawChars(java.lang.String, int, int)
* @see java.awt.Graphics#drawString(byte[], int, int, int, int)
* @see java.awt.Graphics#drawBytes(char[], int, int, int, int)
* @since JDK1.0
*/
public void setFont(Font font) {
mGraphics.setFont(font);
}
/**
* Gets the font metrics for the specified font.
* @return the font metrics for the specified font.
* @param f the specified font
* @see java.awt.Graphics#getFont
* @see java.awt.FontMetrics
* @see java.awt.Graphics#getFontMetrics()
* @since JDK1.0
*/
public FontMetrics getFontMetrics(Font f) {
return mGraphics.getFontMetrics(f);
}
/**
* Get the rendering context of the font
* within this Graphics2D context.
*/
public FontRenderContext getFontRenderContext() {
return mGraphics.getFontRenderContext();
}
/**
* Returns the bounding rectangle of the current clipping area.
* The coordinates in the rectangle are relative to the coordinate
* system origin of this graphics context.
* @return the bounding rectangle of the current clipping area.
* @see java.awt.Graphics#getClip
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(int, int, int, int)
* @see java.awt.Graphics#setClip(Shape)
* @since JDK1.1
*/
public Rectangle getClipBounds() {
return mGraphics.getClipBounds();
}
/**
* Intersects the current clip with the specified rectangle.
* The resulting clipping area is the intersection of the current
* clipping area and the specified rectangle.
* This method can only be used to make the current clip smaller.
* To set the current clip larger, use any of the setClip methods.
* Rendering operations have no effect outside of the clipping area.
* @param x the x coordinate of the rectangle to intersect the clip with
* @param y the y coordinate of the rectangle to intersect the clip with
* @param width the width of the rectangle to intersect the clip with
* @param height the height of the rectangle to intersect the clip with
* @see #setClip(int, int, int, int)
* @see #setClip(Shape)
*/
public void clipRect(int x, int y, int width, int height) {
mGraphics.clipRect(x, y, width, height);
}
/**
* Sets the current clip to the rectangle specified by the given
* coordinates.
* Rendering operations have no effect outside of the clipping area.
* @param x the <i>x coordinate of the new clip rectangle.
* @param y the <i>y coordinate of the new clip rectangle.
* @param width the width of the new clip rectangle.
* @param height the height of the new clip rectangle.
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(Shape)
* @since JDK1.1
*/
public void setClip(int x, int y, int width, int height) {
mGraphics.setClip(x, y, width, height);
}
/**
* Gets the current clipping area.
* @return a <code>Shape object representing the
* current clipping area.
* @see java.awt.Graphics#getClipBounds
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(int, int, int, int)
* @see java.awt.Graphics#setClip(Shape)
* @since JDK1.1
*/
public Shape getClip() {
return mGraphics.getClip();
}
/**
* Sets the current clipping area to an arbitrary clip shape.
* Not all objects which implement the <code>Shape
* interface can be used to set the clip. The only
* <code>Shape objects which are guaranteed to be
* supported are <code>Shape objects which are
* obtained via the <code>getClip method and via
* <code>Rectangle objects.
* @see java.awt.Graphics#getClip()
* @see java.awt.Graphics#clipRect
* @see java.awt.Graphics#setClip(int, int, int, int)
* @since JDK1.1
*/
public void setClip(Shape clip) {
mGraphics.setClip(clip);
}
/**
* Copies an area of the component by a distance specified by
* <code>dx and dy. From the point specified
* by <code>x and y, this method
* copies downwards and to the right. To copy an area of the
* component to the left or upwards, specify a negative value for
* <code>dx or dy.
* If a portion of the source rectangle lies outside the bounds
* of the component, or is obscured by another window or component,
* <code>copyArea will be unable to copy the associated
* pixels. The area that is omitted can be refreshed by calling
* the component's <code>paint method.
* @param x the <i>x coordinate of the source rectangle.
* @param y the <i>y coordinate of the source rectangle.
* @param width the width of the source rectangle.
* @param height the height of the source rectangle.
* @param dx the horizontal distance to copy the pixels.
* @param dy the vertical distance to copy the pixels.
* @since JDK1.0
*/
public void copyArea(int x, int y, int width, int height,
int dx, int dy) {
// This method is not supported for printing so we do nothing here.
}
/**
* Draws a line, using the current color, between the points
* <code>(x1, y1) and (x2, y2)
* in this graphics context's coordinate system.
* @param x1 the first point's <i>x coordinate.
* @param y1 the first point's <i>y coordinate.
* @param x2 the second point's <i>x coordinate.
* @param y2 the second point's <i>y coordinate.
* @since JDK1.0
*/
public void drawLine(int x1, int y1, int x2, int y2) {
addStrokeShape(new Line2D.Float(x1, y1, x2, y2));
mPrintMetrics.draw(this);
}
/**
* Fills the specified rectangle.
* The left and right edges of the rectangle are at
* <code>x and x + width - 1.
* The top and bottom edges are at
* <code>y and y + height - 1.
* The resulting rectangle covers an area
* <code>width pixels wide by
* <code>height pixels tall.
* The rectangle is filled using the graphics context's current color.
* @param x the <i>x coordinate
* of the rectangle to be filled.
* @param y the <i>y coordinate
* of the rectangle to be filled.
* @param width the width of the rectangle to be filled.
* @param height the height of the rectangle to be filled.
* @see java.awt.Graphics#fillRect
* @see java.awt.Graphics#clearRect
* @since JDK1.0
*/
public void fillRect(int x, int y, int width, int height) {
addDrawingRect(new Rectangle2D.Float(x, y, width, height));
mPrintMetrics.fill(this);
}
/**
* Clears the specified rectangle by filling it with the background
* color of the current drawing surface. This operation does not
* use the current paint mode.
* <p>
* Beginning with Java 1.1, the background color
* of offscreen images may be system dependent. Applications should
* use <code>setColor followed by fillRect to
* ensure that an offscreen image is cleared to a specific color.
* @param x the <i>x coordinate of the rectangle to clear.
* @param y the <i>y coordinate of the rectangle to clear.
* @param width the width of the rectangle to clear.
* @param height the height of the rectangle to clear.
* @see java.awt.Graphics#fillRect(int, int, int, int)
* @see java.awt.Graphics#drawRect
* @see java.awt.Graphics#setColor(java.awt.Color)
* @see java.awt.Graphics#setPaintMode
* @see java.awt.Graphics#setXORMode(java.awt.Color)
* @since JDK1.0
*/
public void clearRect(int x, int y, int width, int height) {
Rectangle2D.Float rect = new Rectangle2D.Float(x, y, width, height);
addDrawingRect(rect);
mPrintMetrics.clear(this);
}
/**
* Draws an outlined round-cornered rectangle using this graphics
* context's current color. The left and right edges of the rectangle
* are at <code>x and x + width,
* respectively. The top and bottom edges of the rectangle are at
* <code>y and y + height.
* @param x the <i>x coordinate of the rectangle to be drawn.
* @param y the <i>y coordinate of the rectangle to be drawn.
* @param width the width of the rectangle to be drawn.
* @param height the height of the rectangle to be drawn.
* @param arcWidth the horizontal diameter of the arc
* at the four corners.
* @param arcHeight the vertical diameter of the arc
* at the four corners.
* @see java.awt.Graphics#fillRoundRect
* @since JDK1.0
*/
public void drawRoundRect(int x, int y, int width, int height,
int arcWidth, int arcHeight) {
addStrokeShape(new RoundRectangle2D.Float(x, y, width, height, arcWidth, arcHeight));
mPrintMetrics.draw(this);
}
/**
* Fills the specified rounded corner rectangle with the current color.
* The left and right edges of the rectangle
* are at <code>x and x + width - 1,
* respectively. The top and bottom edges of the rectangle are at
* <code>y and y + height - 1.
* @param x the <i>x coordinate of the rectangle to be filled.
* @param y the <i>y coordinate of the rectangle to be filled.
* @param width the width of the rectangle to be filled.
* @param height the height of the rectangle to be filled.
* @param arcWidth the horizontal diameter
* of the arc at the four corners.
* @param arcHeight the vertical diameter
* of the arc at the four corners.
* @see java.awt.Graphics#drawRoundRect
* @since JDK1.0
*/
public void fillRoundRect(int x, int y, int width, int height,
int arcWidth, int arcHeight) {
Rectangle2D.Float rect = new Rectangle2D.Float(x, y,width, height);
addDrawingRect(rect);
mPrintMetrics.fill(this);
}
/**
* Draws the outline of an oval.
* The result is a circle or ellipse that fits within the
* rectangle specified by the <code>x, y,
* <code>width, and height arguments.
* <p>
* The oval covers an area that is
* <code>width + 1 pixels wide
* and <code>height + 1 pixels tall.
* @param x the <i>x coordinate of the upper left
* corner of the oval to be drawn.
* @param y the <i>y coordinate of the upper left
* corner of the oval to be drawn.
* @param width the width of the oval to be drawn.
* @param height the height of the oval to be drawn.
* @see java.awt.Graphics#fillOval
* @since JDK1.0
*/
public void drawOval(int x, int y, int width, int height) {
addStrokeShape(new Rectangle2D.Float(x, y, width, height));
mPrintMetrics.draw(this);
}
/**
* Fills an oval bounded by the specified rectangle with the
* current color.
* @param x the <i>x coordinate of the upper left corner
* of the oval to be filled.
* @param y the <i>y coordinate of the upper left corner
* of the oval to be filled.
* @param width the width of the oval to be filled.
* @param height the height of the oval to be filled.
* @see java.awt.Graphics#drawOval
* @since JDK1.0
*/
public void fillOval(int x, int y, int width, int height) {
Rectangle2D.Float rect = new Rectangle2D.Float(x, y, width, height);
addDrawingRect(rect);
mPrintMetrics.fill(this);
}
/**
* Draws the outline of a circular or elliptical arc
* covering the specified rectangle.
* <p>
* The resulting arc begins at <code>startAngle and extends
* for <code>arcAngle degrees, using the current color.
* Angles are interpreted such that 0 degrees
* is at the 3 o'clock position.
* A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
* <p>
* The center of the arc is the center of the rectangle whose origin
* is (<i>x, y) and whose size is specified by the
* <code>width and height arguments.
* <p>
* The resulting arc covers an area
* <code>width + 1 pixels wide
* by <code>height + 1 pixels tall.
* @param x the <i>x coordinate of the
* upper-left corner of the arc to be drawn.
* @param y the <i>y coordinate of the
* upper-left corner of the arc to be drawn.
* @param width the width of the arc to be drawn.
* @param height the height of the arc to be drawn.
* @param startAngle the beginning angle.
* @param arcAngle the angular extent of the arc,
* relative to the start angle.
* @see java.awt.Graphics#fillArc
* @since JDK1.0
*/
public void drawArc(int x, int y, int width, int height,
int startAngle, int arcAngle) {
addStrokeShape(new Rectangle2D.Float(x, y, width, height));
mPrintMetrics.draw(this);
}
/**
* Fills a circular or elliptical arc covering the specified rectangle.
* <p>
* The resulting arc begins at <code>startAngle and extends
* for <code>arcAngle degrees.
* Angles are interpreted such that 0 degrees
* is at the 3 o'clock position.
* A positive value indicates a counter-clockwise rotation
* while a negative value indicates a clockwise rotation.
* <p>
* The center of the arc is the center of the rectangle whose origin
* is (<i>x, y) and whose size is specified by the
* <code>width and height arguments.
* <p>
* The resulting arc covers an area
* <code>width + 1 pixels wide
* by <code>height + 1 pixels tall.
* @param x the <i>x coordinate of the
* upper-left corner of the arc to be filled.
* @param y the <i>y coordinate of the
* upper-left corner of the arc to be filled.
* @param width the width of the arc to be filled.
* @param height the height of the arc to be filled.
* @param startAngle the beginning angle.
* @param arcAngle the angular extent of the arc,
* relative to the start angle.
* @see java.awt.Graphics#drawArc
* @since JDK1.0
*/
public void fillArc(int x, int y, int width, int height,
int startAngle, int arcAngle) {
Rectangle2D.Float rect = new Rectangle2D.Float(x, y,width, height);
addDrawingRect(rect);
mPrintMetrics.fill(this);
}
/**
* Draws a sequence of connected lines defined by
* arrays of <i>x and y coordinates.
* Each pair of (<i>x, y) coordinates defines a point.
* The figure is not closed if the first point
* differs from the last point.
* @param xPoints an array of <i>x points
* @param yPoints an array of <i>y points
* @param nPoints the total number of points
* @see java.awt.Graphics#drawPolygon(int[], int[], int)
* @since JDK1.1
*/
public void drawPolyline(int xPoints[], int yPoints[],
int nPoints) {
if (nPoints > 0) {
int x = xPoints[0];
int y = yPoints[0];
for (int i = 1; i < nPoints; i++) {
drawLine(x, y, xPoints[i], yPoints[i]);
x = xPoints[i];
y = yPoints[i];
}
}
}
/**
* Draws a closed polygon defined by
* arrays of <i>x and y coordinates.
* Each pair of (<i>x, y) coordinates defines a point.
* <p>
* This method draws the polygon defined by <code>nPoint line
* segments, where the first <code>nPoint - 1
* line segments are line segments from
* <code>(xPoints[i - 1], yPoints[i - 1])
* to <code>(xPoints[i], yPoints[i]), for
* 1 ≤ <i>i ≤ nPoints.
* The figure is automatically closed by drawing a line connecting
* the final point to the first point, if those points are different.
* @param xPoints a an array of <code>x coordinates.
* @param yPoints a an array of <code>y coordinates.
* @param nPoints a the total number of points.
* @see java.awt.Graphics#fillPolygon
* @see java.awt.Graphics#drawPolyline
* @since JDK1.0
*/
public void drawPolygon(int xPoints[], int yPoints[],
int nPoints) {
if (nPoints > 0) {
drawPolyline(xPoints, yPoints, nPoints);
drawLine(xPoints[nPoints - 1], yPoints[nPoints - 1],
xPoints[0], yPoints[0]);
}
}
/**
* Fills a closed polygon defined by
* arrays of <i>x and y coordinates.
* <p>
* This method draws the polygon defined by <code>nPoint line
* segments, where the first <code>nPoint - 1
* line segments are line segments from
* <code>(xPoints[i - 1], yPoints[i - 1])
* to <code>(xPoints[i], yPoints[i]), for
* 1 ≤ <i>i ≤ nPoints.
* The figure is automatically closed by drawing a line connecting
* the final point to the first point, if those points are different.
* <p>
* The area inside the polygon is defined using an
* even-odd fill rule, also known as the alternating rule.
* @param xPoints a an array of <code>x coordinates.
* @param yPoints a an array of <code>y coordinates.
* @param nPoints a the total number of points.
* @see java.awt.Graphics#drawPolygon(int[], int[], int)
* @since JDK1.0
*/
public void fillPolygon(int xPoints[], int yPoints[],
int nPoints) {
if (nPoints > 0) {
int minX = xPoints[0];
int minY = yPoints[0];
int maxX = xPoints[0];
int maxY = yPoints[0];
for (int i = 1; i < nPoints; i++) {
if (xPoints[i] < minX) {
minX = xPoints[i];
} else if (xPoints[i] > maxX) {
maxX = xPoints[i];
}
if (yPoints[i] < minY) {
minY = yPoints[i];
} else if (yPoints[i] > maxY) {
maxY = yPoints[i];
}
}
addDrawingRect(minX, minY, maxX - minX, maxY - minY);
}
mPrintMetrics.fill(this);
}
/**
* Draws the text given by the specified string, using this
* graphics context's current font and color. The baseline of the
* first character is at position (<i>x, y) in this
* graphics context's coordinate system.
* @param str the string to be drawn.
* @param x the <i>x coordinate.
* @param y the <i>y coordinate.
* @see java.awt.Graphics#drawBytes
* @see java.awt.Graphics#drawChars
* @since JDK1.0
*/
public void drawString(String str, int x, int y) {
drawString(str, (float)x, (float)y);
}
/**
* Draws the text given by the specified iterator, using this
* graphics context's current color. The iterator has to specify a font
* for each character. The baseline of the
* first character is at position (<i>x, y) in this
* graphics context's coordinate system.
* The rendering attributes applied include the clip, transform,
* paint or color, and composite attributes.
* For characters in script systems such as Hebrew and Arabic,
* the glyphs may be draw from right to left, in which case the
* coordinate supplied is the the location of the leftmost character
* on the baseline.
* @param iterator the iterator whose text is to be drawn
* @param x,y the coordinates where the iterator's text should be drawn.
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #setTransform
* @see #setComposite
* @see #setClip
*/
public void drawString(AttributedCharacterIterator iterator,
int x, int y) {
drawString(iterator, (float)x, (float)y);
}
/**
* Draws the text given by the specified iterator, using this
* graphics context's current color. The iterator has to specify a font
* for each character. The baseline of the
* first character is at position (<i>x, y) in this
* graphics context's coordinate system.
* The rendering attributes applied include the clip, transform,
* paint or color, and composite attributes.
* For characters in script systems such as Hebrew and Arabic,
* the glyphs may be draw from right to left, in which case the
* coordinate supplied is the the location of the leftmost character
* on the baseline.
* @param iterator the iterator whose text is to be drawn
* @param x,y the coordinates where the iterator's text should be drawn.
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #setTransform
* @see #setComposite
* @see #setClip
*/
public void drawString(AttributedCharacterIterator iterator,
float x, float y) {
if (iterator == null) {
throw new
NullPointerException("AttributedCharacterIterator is null");
}
TextLayout layout = new TextLayout(iterator, getFontRenderContext());
layout.draw(this, x, y);
}
/**
* Draws as much of the specified image as is currently available.
* The image is drawn with its top-left corner at
* (<i>x, y) in this graphics context's coordinate
* space. Transparent pixels in the image do not affect whatever
* pixels are already there.
* <p>
* This method returns immediately in all cases, even if the
* complete image has not yet been loaded, and it has not been dithered
* and converted for the current output device.
* <p>
* If the image has not yet been completely loaded, then
* <code>drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* @param img the specified image to be drawn.
* @param x the <i>x coordinate.
* @param y the <i>y coordinate.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
ImageObserver observer) {
if (img == null) {
return true;
}
/* The ImageWaiter creation does not return until the
* image is loaded.
*/
ImageWaiter dim = new ImageWaiter(img);
addDrawingRect(x, y, dim.getWidth(), dim.getHeight());
mPrintMetrics.drawImage(this, img);
return mGraphics.drawImage(img, x, y, observer);
}
/**
* Draws as much of the specified image as has already been scaled
* to fit inside the specified rectangle.
* <p>
* The image is drawn inside the specified rectangle of this
* graphics context's coordinate space, and is scaled if
* necessary. Transparent pixels do not affect whatever pixels
* are already there.
* <p>
* This method returns immediately in all cases, even if the
* entire image has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete, then
* <code>drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the image observer by calling its <code>imageUpdate method.
* <p>
* A scaled version of an image will not necessarily be
* available immediately just because an unscaled version of the
* image has been constructed for this output device. Each size of
* the image may be cached separately and generated from the original
* data in a separate image production sequence.
* @param img the specified image to be drawn.
* @param x the <i>x coordinate.
* @param y the <i>y coordinate.
* @param width the width of the rectangle.
* @param height the height of the rectangle.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
int width, int height,
ImageObserver observer) {
if (img == null) {
return true;
}
addDrawingRect(x, y, width, height);
mPrintMetrics.drawImage(this, img);
return mGraphics.drawImage(img, x, y, width, height, observer);
}
/**
* Draws as much of the specified image as is currently available.
* The image is drawn with its top-left corner at
* (<i>x, y) in this graphics context's coordinate
* space. Transparent pixels are drawn in the specified
* background color.
* <p>
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
* <p>
* This method returns immediately in all cases, even if the
* complete image has not yet been loaded, and it has not been dithered
* and converted for the current output device.
* <p>
* If the image has not yet been completely loaded, then
* <code>drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* @param img the specified image to be drawn.
* @param x the <i>x coordinate.
* @param y the <i>y coordinate.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
Color bgcolor,
ImageObserver observer) {
if (img == null) {
return true;
}
/* The ImageWaiter creation does not return until the
* image is loaded.
*/
ImageWaiter dim = new ImageWaiter(img);
addDrawingRect(x, y, dim.getWidth(), dim.getHeight());
mPrintMetrics.drawImage(this, img);
return mGraphics.drawImage(img, x, y, bgcolor, observer);
}
/**
* Draws as much of the specified image as has already been scaled
* to fit inside the specified rectangle.
* <p>
* The image is drawn inside the specified rectangle of this
* graphics context's coordinate space, and is scaled if
* necessary. Transparent pixels are drawn in the specified
* background color.
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
* <p>
* This method returns immediately in all cases, even if the
* entire image has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
* <code>drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* <p>
* A scaled version of an image will not necessarily be
* available immediately just because an unscaled version of the
* image has been constructed for this output device. Each size of
* the image may be cached separately and generated from the original
* data in a separate image production sequence.
* @param img the specified image to be drawn.
* @param x the <i>x coordinate.
* @param y the <i>y coordinate.
* @param width the width of the rectangle.
* @param height the height of the rectangle.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of
* the image is converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.0
*/
public boolean drawImage(Image img, int x, int y,
int width, int height,
Color bgcolor,
ImageObserver observer) {
if (img == null) {
return true;
}
addDrawingRect(x, y, width, height);
mPrintMetrics.drawImage(this, img);
return mGraphics.drawImage(img, x, y, width, height, bgcolor, observer);
}
/**
* Draws as much of the specified area of the specified image as is
* currently available, scaling it on the fly to fit inside the
* specified area of the destination drawable surface. Transparent pixels
* do not affect whatever pixels are already there.
* <p>
* This method returns immediately in all cases, even if the
* image area to be drawn has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
* <code>drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* <p>
* This method always uses the unscaled version of the image
* to render the scaled rectangle and performs the required
* scaling on the fly. It does not use a cached, scaled version
* of the image for this operation. Scaling of the image from source
* to destination is performed such that the first coordinate
* of the source rectangle is mapped to the first coordinate of
* the destination rectangle, and the second source coordinate is
* mapped to the second destination coordinate. The subimage is
* scaled and flipped as needed to preserve those mappings.
* @param img the specified image to be drawn
* @param dx1 the <i>x coordinate of the first corner of the
* destination rectangle.
* @param dy1 the <i>y coordinate of the first corner of the
* destination rectangle.
* @param dx2 the <i>x coordinate of the second corner of the
* destination rectangle.
* @param dy2 the <i>y coordinate of the second corner of the
* destination rectangle.
* @param sx1 the <i>x coordinate of the first corner of the
* source rectangle.
* @param sy1 the <i>y coordinate of the first corner of the
* source rectangle.
* @param sx2 the <i>x coordinate of the second corner of the
* source rectangle.
* @param sy2 the <i>y coordinate of the second corner of the
* source rectangle.
* @param observer object to be notified as more of the image is
* scaled and converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.1
*/
public boolean drawImage(Image img,
int dx1, int dy1, int dx2, int dy2,
int sx1, int sy1, int sx2, int sy2,
ImageObserver observer) {
if (img == null) {
return true;
}
int width = dx2 - dx1;
int height = dy2 - dy1;
addDrawingRect(dx1, dy1, width, height);
mPrintMetrics.drawImage(this, img);
return mGraphics.drawImage(img, dx1, dy1, dx2, dy2,
sx1, sy1, sx2, sy2, observer);
}
/**
* Draws as much of the specified area of the specified image as is
* currently available, scaling it on the fly to fit inside the
* specified area of the destination drawable surface.
* <p>
* Transparent pixels are drawn in the specified background color.
* This operation is equivalent to filling a rectangle of the
* width and height of the specified image with the given color and then
* drawing the image on top of it, but possibly more efficient.
* <p>
* This method returns immediately in all cases, even if the
* image area to be drawn has not yet been scaled, dithered, and converted
* for the current output device.
* If the current output representation is not yet complete then
* <code>drawImage returns false. As more of
* the image becomes available, the process that draws the image notifies
* the specified image observer.
* <p>
* This method always uses the unscaled version of the image
* to render the scaled rectangle and performs the required
* scaling on the fly. It does not use a cached, scaled version
* of the image for this operation. Scaling of the image from source
* to destination is performed such that the first coordinate
* of the source rectangle is mapped to the first coordinate of
* the destination rectangle, and the second source coordinate is
* mapped to the second destination coordinate. The subimage is
* scaled and flipped as needed to preserve those mappings.
* @param img the specified image to be drawn
* @param dx1 the <i>x coordinate of the first corner of the
* destination rectangle.
* @param dy1 the <i>y coordinate of the first corner of the
* destination rectangle.
* @param dx2 the <i>x coordinate of the second corner of the
* destination rectangle.
* @param dy2 the <i>y coordinate of the second corner of the
* destination rectangle.
* @param sx1 the <i>x coordinate of the first corner of the
* source rectangle.
* @param sy1 the <i>y coordinate of the first corner of the
* source rectangle.
* @param sx2 the <i>x coordinate of the second corner of the
* source rectangle.
* @param sy2 the <i>y coordinate of the second corner of the
* source rectangle.
* @param bgcolor the background color to paint under the
* non-opaque portions of the image.
* @param observer object to be notified as more of the image is
* scaled and converted.
* @see java.awt.Image
* @see java.awt.image.ImageObserver
* @see java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
* @since JDK1.1
*/
public boolean drawImage(Image img,
int dx1, int dy1, int dx2, int dy2,
int sx1, int sy1, int sx2, int sy2,
Color bgcolor,
ImageObserver observer) {
if (img == null) {
return true;
}
int width = dx2 - dx1;
int height = dy2 - dy1;
addDrawingRect(dx1, dy1, width, height);
mPrintMetrics.drawImage(this, img);
return mGraphics.drawImage(img, dx1, dy1, dx2, dy2,
sx1, sy1, sx2, sy2, bgcolor, observer);
}
/**
* Draws an image, applying a transform from image space into user space
* before drawing.
* The transformation from user space into device space is done with
* the current transform in the Graphics2D.
* The given transformation is applied to the image before the
* transform attribute in the Graphics2D state is applied.
* The rendering attributes applied include the clip, transform,
* and composite attributes. Note that the result is
* undefined, if the given transform is noninvertible.
* @param img The image to be drawn.
* @param xform The transformation from image space into user space.
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawRenderedImage(RenderedImage img,
AffineTransform xform) {
if (img == null) {
return;
}
mPrintMetrics.drawImage(this, img);
mDrawingArea.addInfinite();
}
public void drawRenderableImage(RenderableImage img,
AffineTransform xform) {
if (img == null) {
return;
}
mPrintMetrics.drawImage(this, img);
mDrawingArea.addInfinite();
}
/**
* Disposes of this graphics context and releases
* any system resources that it is using.
* A <code>Graphics object cannot be used after
* <code>disposehas been called.
* <p>
* When a Java program runs, a large number of <code>Graphics
* objects can be created within a short time frame.
* Although the finalization process of the garbage collector
* also disposes of the same system resources, it is preferable
* to manually free the associated resources by calling this
* method rather than to rely on a finalization process which
* may not run to completion for a long period of time.
* <p>
* Graphics objects which are provided as arguments to the
* <code>paint and update methods
* of components are automatically released by the system when
* those methods return. For efficiency, programmers should
* call <code>dispose when finished using
* a <code>Graphics object only if it was created
* directly from a component or another <code>Graphics object.
* @see java.awt.Graphics#finalize
* @see java.awt.Component#paint
* @see java.awt.Component#update
* @see java.awt.Component#getGraphics
* @see java.awt.Graphics#create
* @since JDK1.0
*/
public void dispose() {
mGraphics.dispose();
}
/**
* Empty finalizer as no clean up needed here.
*/
public void finalize() {
}
/* The Delegated Graphics2D Methods */
/**
* Strokes the outline of a Shape using the settings of the current
* graphics state. The rendering attributes applied include the
* clip, transform, paint or color, composite and stroke attributes.
* @param s The shape to be drawn.
* @see #setStroke
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #transform
* @see #setTransform
* @see #clip
* @see #setClip
* @see #setComposite
*/
public void draw(Shape s) {
addStrokeShape(s);
mPrintMetrics.draw(this);
}
/**
* Draws an image, applying a transform from image space into user space
* before drawing.
* The transformation from user space into device space is done with
* the current transform in the Graphics2D.
* The given transformation is applied to the image before the
* transform attribute in the Graphics2D state is applied.
* The rendering attributes applied include the clip, transform,
* and composite attributes. Note that the result is
* undefined, if the given transform is noninvertible.
* @param img The image to be drawn.
* @param xform The transformation from image space into user space.
* @param obs The image observer to be notified as more of the image
* is converted.
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public boolean drawImage(Image img,
AffineTransform xform,
ImageObserver obs) {
if (img == null) {
return true;
}
mDrawingArea.addInfinite();
mPrintMetrics.drawImage(this, img);
return mGraphics.drawImage(img, xform, obs);
// if (mDrawingArea[0] != null) {
// Rectangle2D.Double bbox = new Rectangle2D.Double();
// Point2D leftTop = new Point2D.Double(0, 0);
// Point2D rightBottom = new Point2D.Double(getImageWidth(img),
// getImageHeight(img));
// xform.transform(leftTop, leftTop);
// xform.transform(rightBottom, rightBottom);
// bbox.setBoundsFromDiagonal(leftTop, rightBottom);
// addDrawingRect(bbox);
// }
}
/**
* Draws a BufferedImage that is filtered with a BufferedImageOp.
* The rendering attributes applied include the clip, transform
* and composite attributes. This is equivalent to:
* <pre>
* img1 = op.filter(img, null);
* drawImage(img1, new AffineTransform(1f,0f,0f,1f,x,y), null);
* </pre>
* @param op The filter to be applied to the image before drawing.
* @param img The BufferedImage to be drawn.
* @param x,y The location in user space where the image should be drawn.
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawImage(BufferedImage img,
BufferedImageOp op,
int x,
int y) {
if (img == null) {
return;
}
mPrintMetrics.drawImage(this, (RenderedImage) img);
mDrawingArea.addInfinite();
}
/**
* Draws a string of text.
* The rendering attributes applied include the clip, transform,
* paint or color, font and composite attributes.
* @param s The string to be drawn.
* @param x,y The coordinates where the string should be drawn.
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see java.awt.Graphics#setFont
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawString(String str,
float x,
float y) {
if (str.length() == 0) {
return;
}
/* Logical bounds close enough and is used for GlyphVector */
FontRenderContext frc = getFontRenderContext();
Rectangle2D bbox = getFont().getStringBounds(str, frc);
addDrawingRect(bbox, x, y);
mPrintMetrics.drawText(this);
}
/**
* Draws a GlyphVector.
* The rendering attributes applied include the clip, transform,
* paint or color, and composite attributes. The GlyphVector specifies
* individual glyphs from a Font.
* @param g The GlyphVector to be drawn.
* @param x,y The coordinates where the glyphs should be drawn.
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void drawGlyphVector(GlyphVector g,
float x,
float y) {
Rectangle2D bbox = g.getLogicalBounds();
addDrawingRect(bbox, x, y);
mPrintMetrics.drawText(this);
}
/**
* Fills the interior of a Shape using the settings of the current
* graphics state. The rendering attributes applied include the
* clip, transform, paint or color, and composite.
* @see #setPaint
* @see java.awt.Graphics#setColor
* @see #transform
* @see #setTransform
* @see #setComposite
* @see #clip
* @see #setClip
*/
public void fill(Shape s) {
addDrawingRect(s.getBounds());
mPrintMetrics.fill(this);
}
/**
* Checks to see if the outline of a Shape intersects the specified
* Rectangle in device space.
* The rendering attributes taken into account include the
* clip, transform, and stroke attributes.
* @param rect The area in device space to check for a hit.
* @param s The shape to check for a hit.
* @param onStroke Flag to choose between testing the stroked or
* the filled shape.
* @return True if there is a hit, false otherwise.
* @see #setStroke
* @see #fill
* @see #draw
* @see #transform
* @see #setTransform
* @see #clip
* @see #setClip
*/
public boolean hit(Rectangle rect,
Shape s,
boolean onStroke) {
return mGraphics.hit(rect, s, onStroke);
}
/**
* Sets the Composite in the current graphics state. Composite is used
* in all drawing methods such as drawImage, drawString, draw,
* and fill. It specifies how new pixels are to be combined with
* the existing pixels on the graphics device in the rendering process.
* @param comp The Composite object to be used for drawing.
* @see java.awt.Graphics#setXORMode
* @see java.awt.Graphics#setPaintMode
* @see AlphaComposite
*/
public void setComposite(Composite comp) {
mGraphics.setComposite(comp);
}
/**
* Sets the Paint in the current graphics state.
* @param paint The Paint object to be used to generate color in
* the rendering process.
* @see java.awt.Graphics#setColor
* @see GradientPaint
* @see TexturePaint
*/
public void setPaint(Paint paint) {
mGraphics.setPaint(paint);
}
/**
* Sets the Stroke in the current graphics state.
* @param s The Stroke object to be used to stroke a Shape in
* the rendering process.
* @see BasicStroke
*/
public void setStroke(Stroke s) {
mGraphics.setStroke(s);
}
/**
* Sets the preferences for the rendering algorithms.
* Hint categories include controls for rendering quality and
* overall time/quality trade-off in the rendering process.
* @param hintCategory The category of hint to be set.
* @param hintValue The value indicating preferences for the specified
* hint category.
* @see RenderingHints
*/
public void setRenderingHint(Key hintCategory, Object hintValue) {
mGraphics.setRenderingHint(hintCategory, hintValue);
}
/**
* Returns the preferences for the rendering algorithms.
* @param hintCategory The category of hint to be set.
* @return The preferences for rendering algorithms.
* @see RenderingHings
*/
public Object getRenderingHint(Key hintCategory) {
return mGraphics.getRenderingHint(hintCategory);
}
/**
* Sets the preferences for the rendering algorithms.
* Hint categories include controls for rendering quality and
* overall time/quality trade-off in the rendering process.
* @param hints The rendering hints to be set
* @see RenderingHints
*/
public void setRenderingHints(Map<?,?> hints) {
mGraphics.setRenderingHints(hints);
}
/**
* Adds a number of preferences for the rendering algorithms.
* Hint categories include controls for rendering quality and
* overall time/quality trade-off in the rendering process.
* @param hints The rendering hints to be set
* @see RenderingHints
*/
public void addRenderingHints(Map<?,?> hints) {
mGraphics.addRenderingHints(hints);
}
/**
* Gets the preferences for the rendering algorithms.
* Hint categories include controls for rendering quality and
* overall time/quality trade-off in the rendering process.
* @see RenderingHints
*/
public RenderingHints getRenderingHints() {
return mGraphics.getRenderingHints();
}
/**
* Composes a Transform object with the transform in this
* Graphics2D according to the rule last-specified-first-applied.
* If the currrent transform is Cx, the result of composition
* with Tx is a new transform Cx'. Cx' becomes the current
* transform for this Graphics2D.
* Transforming a point p by the updated transform Cx' is
* equivalent to first transforming p by Tx and then transforming
* the result by the original transform Cx. In other words,
* Cx'(p) = Cx(Tx(p)).
* A copy of the Tx is made, if necessary, so further
* modifications to Tx do not affect rendering.
* @param Tx The Transform object to be composed with the current
* transform.
* @see #setTransform
* @see TransformChain
* @see AffineTransform
*/
public void transform(AffineTransform Tx) {
mGraphics.transform(Tx);
}
/**
* Sets the Transform in the current graphics state.
* @param Tx The Transform object to be used in the rendering process.
* @see #transform
* @see TransformChain
* @see AffineTransform
*/
public void setTransform(AffineTransform Tx) {
mGraphics.setTransform(Tx);
}
/**
* Returns the current Transform in the Graphics2D state.
* @see #transform
* @see #setTransform
*/
public AffineTransform getTransform() {
return mGraphics.getTransform();
}
/**
* Returns the current Paint in the Graphics2D state.
* @see #setPaint
* @see java.awt.Graphics#setColor
*/
public Paint getPaint() {
return mGraphics.getPaint();
}
/**
* Returns the current Composite in the Graphics2D state.
* @see #setComposite
*/
public Composite getComposite() {
return mGraphics.getComposite();
}
/**
* Sets the background color in this context used for clearing a region.
* When Graphics2D is constructed for a component, the backgroung color is
* inherited from the component. Setting the background color in the
* Graphics2D context only affects the subsequent clearRect() calls and
* not the background color of the component. To change the background
* of the component, use appropriate methods of the component.
* @param color The background color that should be used in
* subsequent calls to clearRect().
* @see getBackground
* @see Graphics.clearRect()
*/
public void setBackground(Color color) {
mGraphics.setBackground(color);
}
/**
* Returns the background color used for clearing a region.
* @see setBackground
*/
public Color getBackground() {
return mGraphics.getBackground();
}
/**
* Returns the current Stroke in the Graphics2D state.
* @see setStroke
*/
public Stroke getStroke() {
return mGraphics.getStroke();
}
/**
* Intersects the current clip with the interior of the specified Shape
* and sets the current clip to the resulting intersection.
* The indicated shape is transformed with the current transform in the
* Graphics2D state before being intersected with the current clip.
* This method is used to make the current clip smaller.
* To make the clip larger, use any setClip method.
* @param s The Shape to be intersected with the current clip.
*/
public void clip(Shape s) {
mGraphics.clip(s);
}
/**
* Return true if the Rectangle <code>rect
* intersects the area into which the application
* has drawn.
*/
public boolean hitsDrawingArea(Rectangle rect) {
return mDrawingArea.intersects((float) rect.getMinY(),
(float) rect.getMaxY());
}
/**
* Return the object holding the summary of the
* drawing done by the printing application.
*/
public PeekMetrics getMetrics() {
return mPrintMetrics;
}
/* Support Routines for Calculating the Drawing Area */
/**
* Shift the rectangle 'rect' to the position ('x', 'y')
* and add the resulting rectangle to the area representing
* the part of the page which is drawn into.
*/
private void addDrawingRect(Rectangle2D rect, float x, float y) {
addDrawingRect((float) (rect.getX() + x),
(float) (rect.getY() + y),
(float) rect.getWidth(),
(float) rect.getHeight());
}
private void addDrawingRect(float x, float y, float width, float height) {
Rectangle2D.Float bbox = new Rectangle2D.Float(x, y, width, height);
addDrawingRect(bbox);
}
/**
* Add the rectangle 'rect' to the area representing
* the part of the page which is drawn into.
*/
private void addDrawingRect(Rectangle2D rect) {
/* For testing purposes the following line can be uncommented.
When uncommented it causes the entire page to be rasterized
thus eliminating errors caused by a faulty bounding box
calculation.
*/
//mDrawingArea.addInfinite();
AffineTransform matrix = getTransform();
Shape transShape = matrix.createTransformedShape(rect);
Rectangle2D transRect = transShape.getBounds2D();
mDrawingArea.add((float) transRect.getMinY(),
(float) transRect.getMaxY());
}
/**
* Add the stroked shape to the area representing
* the part of the page which is drawn into.
*/
private void addStrokeShape(Shape s) {
Shape transShape = getStroke().createStrokedShape(s);
addDrawingRect(transShape.getBounds2D());
}
/* Image Observer */
/**
* Notify this object when the height or width become available
* for an image.
*/
public synchronized boolean imageUpdate(Image img, int infoFlags,
int x, int y,
int width, int height) {
boolean gotInfo = false;
if((infoFlags & (WIDTH | HEIGHT)) != 0) {
gotInfo = true;
notify();
}
return gotInfo;
}
private synchronized int getImageWidth(Image img) {
/* Wait for the width the image to
* become available.
*/
while (img.getWidth(this) == -1) {
try {
wait();
} catch (InterruptedException e) {
}
}
return img.getWidth(this);
}
private synchronized int getImageHeight(Image img) {
/* Wait for the height the image to
* become available.
*/
while (img.getHeight(this) == -1) {
try {
wait();
} catch (InterruptedException e) {
}
}
return img.getHeight(this);
}
/**
* This private class does not return from its constructor
* until 'img's width and height are available.
*/
protected class ImageWaiter implements ImageObserver {
private int mWidth;
private int mHeight;
private boolean badImage = false;
ImageWaiter(Image img) {
waitForDimensions(img);
}
public int getWidth() {
return mWidth;
}
public int getHeight() {
return mHeight;
}
synchronized private void waitForDimensions(Image img) {
mHeight = img.getHeight(this);
mWidth = img.getWidth(this);
while (!badImage && (mWidth < 0 || mHeight < 0)) {
try {
Thread.sleep(50);
} catch(InterruptedException e) {
// do nothing.
}
mHeight = img.getHeight(this);
mWidth = img.getWidth(this);
}
if (badImage) {
mHeight = 0;
mWidth = 0;
}
}
synchronized public boolean imageUpdate(Image image, int flags,
int x, int y, int w, int h) {
boolean dontCallMeAgain = (flags & (HEIGHT | ABORT | ERROR)) != 0;
badImage = (flags & (ABORT | ERROR)) != 0;
return dontCallMeAgain;
}
}
}
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