Examples of org.geotools.styling.Fill

org.geotools.styling.Fill
l.opengeospatial.org/files/?artifact_id=1188"> OGC Styled-Layer Descriptor Report (OGC 02-070) version 1.0.0.:
```
 <xsd:element name="Fill"> <xsd:annotation> <xsd:documentation> A "Fill" specifies the pattern for filling an area geometry. The allowed CssParameters are: "fill" (color) and "fill-opacity". </xsd:documentation> </xsd:annotation> <xsd:complexType> <xsd:sequence> <xsd:element ref="sld:GraphicFill" minOccurs="0"/> <xsd:element ref="sld:CssParameter" minOccurs="0" maxOccurs="unbounded"/> </xsd:sequence> </xsd:complexType> </xsd:element> 
```
Renderers can use this information when displaying styled features, though it must be remembered that not all renderers will be able to fully represent strokes as set out by this interface. For example, opacity may not be supported.

Notes:
- The graphical parameters and their values are derived from SVG/CSS2 standards with names and semantics which are as close as possible.
@author James Macgill, CCG @source $URL$ @version $Id$

    public static Color polyFill( PolygonSymbolizer symbolizer ) {
        if (symbolizer == null) {
            return null;
        }


        Fill fill = symbolizer.getFill();


        if (fill == null) {
            return null;
        }


        Expression color = fill.getColor();
        return color(color);
    }

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        }


        for( GraphicalSymbol gs : graphic.graphicalSymbols() ) {
            if ((gs != null) && (gs instanceof Mark)) {
                Mark mark = (Mark) gs;
                Fill fill = mark.getFill();
                if (fill != null) {
                    Color colour = color(fill.getColor());
                    if (colour == null) {
                        return null;
                    }
                    Expression opacity = fill.getOpacity();
                    if (opacity == null)
                        opacity = ff.literal(1.0);
                    float alpha = (float) Filters.asDouble(opacity);
                    colour = new Color(colour.getRed() / 255f, colour.getGreen() / 255f, colour.getBlue() / 255f, alpha);
                    if (colour != null) {

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    public void setFill( Fill fill2, Mode mode, Color defaultColor ) {
        listen(false);
        try {


            boolean enabled = true;
            Fill fill = fill2;
            if (fill == null) {
                StyleBuilder builder = new StyleBuilder();
                fill = builder.createFill(defaultColor, 0.5);
                enabled = false;
            }

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                filterFactory.literal(strokeColor),
                filterFactory.literal(1),
                filterFactory.literal(0.5));


        // create a partial opaque fill
        Fill fill = styleFactory.createFill(
                filterFactory.literal(fillColor),
                filterFactory.literal(0.5));


        /*
         * Setting the geometryPropertyName arg to null signals that we want to

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      if (childName.equalsIgnoreCase(geomString)) {
        symbol.setGeometry(parseGeometry(child));
      } else if (childName.equalsIgnoreCase(strokeString)) {
        symbol.setStroke(parseStroke(child));
      } else if (childName.equalsIgnoreCase(fillSt)) {
        Fill fill = parseFill(child);
        symbol.setFill(parseFill(child));
      } else if (childName.equalsIgnoreCase(VendorOptionString)) {
        parseVendorOption(symbol, child);
      }
    }

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  protected Fill parseFill(Node root) {
    if (LOGGER.isLoggable(Level.FINEST)) {
      LOGGER.finest("parsing fill ");
    }


    Fill fill = new FillImpl3D();
    NodeList list = findElements(((Element) root), "GraphicFill");
    int length = list.getLength();
    if (length > 0) {
      if (LOGGER.isLoggable(Level.FINEST))
        LOGGER.finest("fill found a graphic fill " + list.item(0));


      NodeList kids = list.item(0).getChildNodes();


      for (int i = 0; i < kids.getLength(); i++) {
        Node child = kids.item(i);


        if ((child == null)
            || (child.getNodeType() != Node.ELEMENT_NODE)) {
          continue;
        }
        String childName = child.getLocalName();
        if (childName == null) {
          childName = child.getNodeName();
        }
        if (childName.equalsIgnoreCase(graphicSt)) {
          Graphic g = parseGraphic(child);
          if (LOGGER.isLoggable(Level.FINEST))
            LOGGER.finest("setting fill graphic with " + g);
          fill.setGraphicFill(g);
        }
      }
    }


    list = findElements(((Element) root), "CssParameter");
    length = list.getLength();
    for (int i = 0; i < length; i++) {
      Node child = list.item(i);


      if ((child == null) || (child.getNodeType() != Node.ELEMENT_NODE)) {
        continue;
      }


      Element param = (Element) child;
      org.w3c.dom.NamedNodeMap map = param.getAttributes();
      final int mapLength = map.getLength();
      if (LOGGER.isLoggable(Level.FINEST)) {
        LOGGER.finest("now I am processing " + child);
      }


      if (LOGGER.isLoggable(Level.FINEST)) {
        LOGGER.finest("attributes " + map.toString());
      }


      for (int k = 0; k < mapLength; k++) {
        String res = map.item(k).getNodeValue();


        if (LOGGER.isLoggable(Level.FINEST)) {
          LOGGER.finest("processing attribute " + res);
        }


        if (res.equalsIgnoreCase(fillSt)) {
          fill.setColor(parseCssParameter(child));
        } else if (res.equalsIgnoreCase(opacityString)
            || res.equalsIgnoreCase("fill-opacity")) {
          fill.setOpacity(parseCssParameter(child));
        }
      }
    }


    /*************************/

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    }


    private Mark injectMark(String key, Mark mark) {
        final Expression wellKnownName;
        final Stroke stroke;
        final Fill fill;
        final Expression size = null; // size and fill are handled only at the PointSymbolizer level - bug?
        final Expression rotation = null;
        
        if (mark.getWellKnownName() == null || isStatic(mark.getWellKnownName())) {
            wellKnownName = mark.getWellKnownName();

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                double size = font.getSize().evaluate(feature, Double.class);
                scale = Math.round(size / Font.DEFAULT_FONTSIZE * 100) / 100.0;
            }
            ls.setScale(scale);


            Fill fill = symbolizer.getFill();
            if (fill != null) {
                Double opacity = fill.getOpacity().evaluate(feature, Double.class);
                if (opacity == null || Double.isNaN(opacity)) {
                    opacity = 1.0;
                }
                Color color = fill.getColor().evaluate(feature, Color.class);
                ls.setColor(colorToHex(color, opacity));
            } else {
                ls.setColor("ffffffff");
            }
        }

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                setLineStyle(style, feature, symbolizer.getStroke());
            }


            // fill
            PolyStyle ps = style.createAndSetPolyStyle();
            Fill fill = symbolizer.getFill();
            if (fill != null) {
                // get opacity
                Double opacity = fill.getOpacity().evaluate(feature, Double.class);
                if (opacity == null || Double.isNaN(opacity)) {
                    opacity = 1.0;
                }


                Color color = (Color) fill.getColor().evaluate(feature, Color.class);
                ps.setColor(colorToHex(color, opacity));
            } else {
                // make it transparent
                ps.setColor("00aaaaaa");
            }

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    }


    @Override
    public void visit(Fill fill) {
        super.visit(fill);
        Fill copy = (Fill) pages.peek();
        if (copy.getGraphicFill() != null) {
            copy.setGraphicFill(null);
            copy.setColor(sb.colorExpression(Color.BLACK));
            copy.setOpacity(ff.literal(1));
        }
    }

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