Examples of org.geotools.styling.ExternalGraphic

org.geotools.styling.ExternalGraphic
l.opengeospatial.org/files/?artifact_id=1188"> OGC Styled-Layer Descriptor Report (OGC 02-070) version 1.0.0.:
```
 <xsd:element name="ExternalGraphic"> <xsd:annotation> <xsd:documentation> An "ExternalGraphic" gives a reference to an external raster or vector graphical object. </xsd:documentation> </xsd:annotation> <xsd:complexType> <xsd:sequence> <xsd:element ref="sld:OnlineResource"/> <xsd:element ref="sld:Format"/> </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 $Id$

            }
            


            for (GraphicalSymbol gs : gr.graphicalSymbols()) {
                if(gs instanceof ExternalGraphic) {
                    ExternalGraphic eg = (ExternalGraphic) gs;
                    Icon icon = null;
                    if(eg.getInlineContent() != null) {
                        icon = eg.getInlineContent();
                    } else {
                        String location = eg.getLocation().toExternalForm();
                        // expand embedded cql expression
                        Expression expanded = ExpressionExtractor.extractCqlExpressions(location);
                        // if not a literal there is an attribute dependency
                        if(!(expanded instanceof Literal)) {
                            estimateAccurate = false;
                            return;
                        }
                        
                        Iterator<ExternalGraphicFactory> it  = DynamicSymbolFactoryFinder.getExternalGraphicFactories();
                        while(it.hasNext() && icon == null) {
                            try {
                                ExternalGraphicFactory factory = it.next();
                                icon = factory.getIcon(null, expanded, eg.getFormat(), imageSize);
                            } catch(Exception e) {
                                LOGGER.log(Level.FINE, "Error occurred evaluating external graphic", e);
                            }
                        }
                    }

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    List<GraphicalSymbol> symbols = sldGraphic.graphicalSymbols();
    if (symbols == null || symbols.isEmpty()) {
      return null;
    }
    final int length = symbols.size();
    ExternalGraphic eg;
    BufferedImage img = null;
    double dsize;
    AffineTransform scaleTx;
    AffineTransformOp ato;
    BufferedImage scaledImage;

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        Icon icon = null;
        Mark mark = null;
        Shape shape = null;
        for (GraphicalSymbol symbol : gr.graphicalSymbols()) {
            if(symbol instanceof ExternalGraphic) {
                ExternalGraphic eg = (ExternalGraphic) symbol;
                icon = getIcon(eg, feature, graphicSize);
                if (icon != null) {
                    break;
                }    
            } else if(symbol instanceof Mark) {

View Full Code Here

    Style style = styleBuilder.createStyle();
    
    PointSymbolizer pointSymbolizer = styleBuilder.createPointSymbolizer();
    
    Graphic graphic = styleBuilder.createGraphic();
    ExternalGraphic external = styleBuilder.createExternalGraphic("file:///C:/images/house.gif",
            "image/gif");
    graphic.graphicalSymbols().add(external);
    graphic.graphicalSymbols().add(styleBuilder.createMark("circle"));
    
    pointSymbolizer.setGraphic(graphic);

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        catch (MalformedURLException huh ){
            
        }
        String format = exgr.getFormat();
        Icon inlineContent = exgr.getInlineContent();
        ExternalGraphic copy;
        if (inlineContent != null) {
            copy = sf.createExternalGraphic(inlineContent, format);
        } else {
            copy = sf.createExternalGraphic(uri, format);
        }
        copy.setCustomProperties( copy(exgr.getCustomProperties()));
        
        if( STRICT && !copy.equals( exgr )){
            throw new IllegalStateException("Was unable to duplicate provided ExternalGraphic:"+exgr );
        }
        pages.push(copy);       
    }

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        assertTrue(!rule.equals(clone));
    }


    public void testPointSymbolizer() throws Exception {
        URL urlExternal = getClass().getResource("/data/sld/blob.gif");
        ExternalGraphic extg = sb.createExternalGraphic(urlExternal, "image/svg+xml");
        Graphic graphic = sb.createGraphic(extg, null, null);
        PointSymbolizer pointSymb = sb.createPointSymbolizer(graphic);


        pointSymb.accept(visitor);
        PointSymbolizer clone = (PointSymbolizer) visitor.getCopy();

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        Graphic notEq = sf.getDefaultGraphic();
        assertEqualsContract(clone, notEq, graphic);
    }


    public void testExternalGraphic() {
        ExternalGraphic exGraphic = sf.createExternalGraphic("http://somewhere",
                "image/png");
        ExternalGraphic clone = visitor.copy( exGraphic);
        assertCopy(exGraphic, clone);


        ExternalGraphic notEq = sf.createExternalGraphic("http://somewhereelse",
                "image/jpeg");
        assertEqualsContract(clone, notEq, exGraphic);


        // make sure it works for different format, same url
        ExternalGraphic notEq2 = visitor.copy( clone);
        notEq2.setFormat("image/jpeg");
        assertEqualsContract(clone, notEq2, exGraphic);
    }

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            public int getIconHeight() {
                return 16;
            }
        };


        ExternalGraphic exGraphic = sf.createExternalGraphic(icon, "image/png");
        ExternalGraphic clone = visitor.copy(exGraphic);
        assertCopy(exGraphic, clone);
        assertSame(exGraphic.getInlineContent(), clone.getInlineContent());


        ExternalGraphic notEq = sf.createExternalGraphic(icon, "image/jpeg");
        assertEqualsContract(clone, notEq, exGraphic);


        // make sure it works for different format, same content
        ExternalGraphic notEq2 = visitor.copy(clone);
        notEq2.setFormat("image/jpeg");
        assertEqualsContract(clone, notEq2, exGraphic);
    }

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    }
    


    public void testPointSymbolizerWithGeomFunction() throws Exception {
        URL urlExternal = getClass().getResource("/data/sld/blob.gif");
        ExternalGraphic extg = sb.createExternalGraphic(urlExternal, "image/svg+xml");
        Graphic graphic = sb.createGraphic(extg, null, null);
        PointSymbolizer pointSymb = sb.createPointSymbolizer(graphic);
        
        // Set a function as geometry
        Function geomFunc = ff.function("centroid", ff.property("thr_geom"));

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        f.appendChild(document.createTextNode("image/png"));


        document.getDocumentElement().appendChild(c);
        document.getDocumentElement().appendChild(f);


        ExternalGraphic externalGraphic = (ExternalGraphic) parse();
        assertNotNull(externalGraphic);


        assertEquals("image/png", externalGraphic.getFormat());
        assertImagesEqual(getReferenceImage("inlineContent-image.png"), externalGraphic.getInlineContent());
        assertNull(externalGraphic.getLocation());
    }

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