/**
* Transforms a <code>GradientPaint</code> instance to fit the specified
* <code>target</code> shape.
*
* @param paint the original paint (<code>null</code> not permitted).
* @param target the target shape (<code>null</code> not permitted).
*
* @return The transformed paint.
*/
public GradientPaint transform(final GradientPaint paint,
final Shape target) {
GradientPaint result = paint;
final Rectangle2D bounds = target.getBounds2D();
if (this.type.equals(GradientPaintTransformType.VERTICAL)) {
result = new GradientPaint((float) bounds.getCenterX(),
(float) bounds.getMinY(), paint.getColor1(),
(float) bounds.getCenterX(), (float) bounds.getMaxY(),
paint.getColor2());
}
else if (this.type.equals(GradientPaintTransformType.HORIZONTAL)) {
result = new GradientPaint((float) bounds.getMinX(),
(float) bounds.getCenterY(), paint.getColor1(),
(float) bounds.getMaxX(), (float) bounds.getCenterY(),
paint.getColor2());
}
else if (this.type.equals(
GradientPaintTransformType.CENTER_HORIZONTAL)) {
result = new GradientPaint((float) bounds.getCenterX(),
(float) bounds.getCenterY(), paint.getColor2(),
(float) bounds.getMaxX(), (float) bounds.getCenterY(),
paint.getColor1(), true);
}
else if (this.type.equals(GradientPaintTransformType.CENTER_VERTICAL)) {
result = new GradientPaint((float) bounds.getCenterX(),
(float) bounds.getMinY(), paint.getColor1(),
(float) bounds.getCenterX(), (float) bounds.getCenterY(),
paint.getColor2(), true);
}
return result;
}
/**
* Sets the paint for this graphics context. For now, this graphics context only supports
* instances of {@link Color} or {@link GradientPaint} (in the latter case there is no real
* gradient support, the paint used is the {@code Color} returned by {@code getColor1()}).
*
* @param paint the paint ({@code null} permitted, ignored).
* @see #getPaint()
* @see #setColor(Color)
*/
@Override
public void setPaint(Paint paint) {
if (paint == null) {
return; // to be consistent with other Graphics2D implementations
}
if (paint instanceof Color) {
setColor((Color) paint);
} else if (paint instanceof GradientPaint) {
GradientPaint gp = (GradientPaint) paint;
setColor(gp.getColor1());
} else {
throw new RuntimeException("Can only handle 'Color' at present.");
}
}
/**
* Performs the writing of a {@link GradientPaint} object.
*
* @param tagName the tag name.
* @param object the {@link GradientPaint} object.
* @param writer the writer.
* @param mPlexAttribute ??.
* @param mPlexValue ??.
* @throws IOException if there is an I/O error.
* @throws XMLWriterException if there is a writer error.
*/
public void write(
final String tagName,
final Object object,
final XMLWriter writer,
final String mPlexAttribute,
final String mPlexValue)
throws IOException, XMLWriterException {
final GradientPaint paint = (GradientPaint) object;
writer.writeTag(tagName, mPlexAttribute, mPlexValue, false);
writer.startBlock();
final RootXmlWriteHandler rootHandler = getRootHandler();
rootHandler.write("color1", paint.getColor1(), Color.class, writer);
writer.allowLineBreak();
rootHandler.write("color2", paint.getColor2(), Color.class, writer);
writer.allowLineBreak();
rootHandler.write("point1", paint.getPoint1(), Point2D.class, writer);
writer.allowLineBreak();
rootHandler.write("point2", paint.getPoint2(), Point2D.class, writer);
writer.endBlock();
writer.writeCloseTag(tagName);
}
/**
* Paints a single bar instance.
*
* @param g2 the graphics target.
* @param renderer the renderer.
* @param row the row index.
* @param column the column index.
* @param bar the bar
* @param base indicates which side of the rectangle is the base of the bar.
*/
public void paintBar(
Graphics2D g2,
XYBarRenderer renderer,
int row,
int column,
RectangularShape bar,
RectangleEdge base) {
Paint itemPaint = renderer.getItemPaint(row, column);
Color c0, c1;
if (itemPaint instanceof Color) {
c0 = (Color) itemPaint;
c1 = c0.brighter();
} else if (itemPaint instanceof GradientPaint) {
GradientPaint gp = (GradientPaint) itemPaint;
c0 = gp.getColor1();
c1 = gp.getColor2();
} else {
c0 = Color.blue;
c1 = Color.blue.brighter();
}
// as a special case, if the bar colour has alpha == 0, we draw
// nothing.
if (c0.getAlpha() == 0) {
return;
}
if (base == RectangleEdge.TOP || base == RectangleEdge.BOTTOM) {
Rectangle2D[] regions = splitVerticalBar(bar, this.g1, this.g2, this.g3);
GradientPaint gp =
new GradientPaint(
(float) regions[0].getMinX(),
0.0f,
c0,
(float) regions[0].getMaxX(),
0.0f,
Color.white);
g2.setPaint(gp);
g2.fill(regions[0]);
gp =
new GradientPaint(
(float) regions[1].getMinX(),
0.0f,
Color.white,
(float) regions[1].getMaxX(),
0.0f,
c0);
g2.setPaint(gp);
g2.fill(regions[1]);
gp =
new GradientPaint(
(float) regions[2].getMinX(), 0.0f, c0, (float) regions[2].getMaxX(), 0.0f, c1);
g2.setPaint(gp);
g2.fill(regions[2]);
gp =
new GradientPaint(
(float) regions[3].getMinX(), 0.0f, c1, (float) regions[3].getMaxX(), 0.0f, c0);
g2.setPaint(gp);
g2.fill(regions[3]);
} else if (base == RectangleEdge.LEFT || base == RectangleEdge.RIGHT) {
Rectangle2D[] regions = splitHorizontalBar(bar, this.g1, this.g2, this.g3);
GradientPaint gp =
new GradientPaint(
0.0f,
(float) regions[0].getMinY(),
c0,
0.0f,
(float) regions[0].getMaxX(),
Color.white);
g2.setPaint(gp);
g2.fill(regions[0]);
gp =
new GradientPaint(
0.0f,
(float) regions[1].getMinY(),
Color.white,
0.0f,
(float) regions[1].getMaxY(),
c0);
g2.setPaint(gp);
g2.fill(regions[1]);
gp =
new GradientPaint(
0.0f, (float) regions[2].getMinY(), c0, 0.0f, (float) regions[2].getMaxY(), c1);
g2.setPaint(gp);
g2.fill(regions[2]);
gp =
new GradientPaint(
0.0f, (float) regions[3].getMinY(), c1, 0.0f, (float) regions[3].getMaxY(), c0);
g2.setPaint(gp);
g2.fill(regions[3]);
}
// draw the outline...
if (renderer.isDrawBarOutline()
/*&& state.getBarWidth() > renderer.BAR_OUTLINE_WIDTH_THRESHOLD*/ ) {
Stroke stroke = renderer.getItemOutlineStroke(row, column);
Paint paint = renderer.getItemPaint(row, column);
if (stroke != null && paint != null) {
g2.setStroke(stroke);
g2.setPaint(paint);
g2.draw(bar);
}
}
}
private void setPaint(boolean invert, double xoffset, double yoffset, boolean fill) {
if (paint instanceof Color) {
Color color = (Color) paint;
int alpha = color.getAlpha();
if (fill) {
if (alpha != currentFillGState) {
currentFillGState = alpha;
PdfGState gs = fillGState[alpha];
if (gs == null) {
gs = new PdfGState();
gs.setFillOpacity(alpha / 255f);
fillGState[alpha] = gs;
}
cb.setGState(gs);
}
cb.setColorFill(color);
} else {
if (alpha != currentStrokeGState) {
currentStrokeGState = alpha;
PdfGState gs = strokeGState[alpha];
if (gs == null) {
gs = new PdfGState();
gs.setStrokeOpacity(alpha / 255f);
strokeGState[alpha] = gs;
}
cb.setGState(gs);
}
cb.setColorStroke(color);
}
} else if (paint instanceof GradientPaint) {
GradientPaint gp = (GradientPaint) paint;
Point2D p1 = gp.getPoint1();
transform.transform(p1, p1);
Point2D p2 = gp.getPoint2();
transform.transform(p2, p2);
Color c1 = gp.getColor1();
Color c2 = gp.getColor2();
PdfShading shading =
PdfShading.simpleAxial(
cb.getPdfWriter(),
(float) p1.getX(),
normalizeY((float) p1.getY()),
(float) p2.getX(),
normalizeY((float) p2.getY()),
c1,
c2);
PdfShadingPattern pat = new PdfShadingPattern(shading);
if (fill) cb.setShadingFill(pat);
else cb.setShadingStroke(pat);
} else if (paint instanceof TexturePaint) {
try {
TexturePaint tp = (TexturePaint) paint;
BufferedImage img = tp.getImage();
Rectangle2D rect = tp.getAnchorRect();
com.lowagie.text.Image image = com.lowagie.text.Image.getInstance(img, null);
PdfPatternPainter pattern = cb.createPattern(image.getWidth(), image.getHeight());
AffineTransform inverse = this.normalizeMatrix();
inverse.translate(rect.getX(), rect.getY());
inverse.scale(rect.getWidth() / image.getWidth(), -rect.getHeight() / image.getHeight());
double[] mx = new double[6];
inverse.getMatrix(mx);
pattern.setPatternMatrix(
(float) mx[0],
(float) mx[1],
(float) mx[2],
(float) mx[3],
(float) mx[4],
(float) mx[5]);
image.setAbsolutePosition(0, 0);
pattern.addImage(image);
if (fill) cb.setPatternFill(pattern);
else cb.setPatternStroke(pattern);
} catch (Exception ex) {
if (fill) cb.setColorFill(Color.gray);
else cb.setColorStroke(Color.gray);
}
} else {
try {
BufferedImage img = null;
int type = BufferedImage.TYPE_4BYTE_ABGR;
if (paint.getTransparency() == Transparency.OPAQUE) {
type = BufferedImage.TYPE_3BYTE_BGR;
}
img = new BufferedImage((int) width, (int) height, type);
Graphics2D g = (Graphics2D) img.getGraphics();
g.transform(transform);
AffineTransform inv = transform.createInverse();
Shape fillRect = new Rectangle2D.Double(0, 0, img.getWidth(), img.getHeight());
fillRect = inv.createTransformedShape(fillRect);
g.setPaint(paint);
g.fill(fillRect);
if (invert) {
AffineTransform tx = new AffineTransform();
tx.scale(1, -1);
tx.translate(-xoffset, -yoffset);
g.drawImage(img, tx, null);
}
g.dispose();
g = null;
com.lowagie.text.Image image = com.lowagie.text.Image.getInstance(img, null);
PdfPatternPainter pattern = cb.createPattern(width, height);
image.setAbsolutePosition(0, 0);
pattern.addImage(image);
if (fill) cb.setPatternFill(pattern);
else cb.setPatternStroke(pattern);
} catch (Exception ex) {
if (fill) cb.setColorFill(Color.gray);
else cb.setColorStroke(Color.gray);
}
}
}