Examples of org.geotools.styling.TextSymbolizer

org.geotools.styling.TextSymbolizer

l.opengeospatial.org/files/?artifact_id=1188"> OGC Styled-Layer Descriptor Report (OGC 02-070) version 1.0.0.:

 <xsd:element name="TextSymbolizer" substitutionGroup="sld:Symbolizer"> <xsd:annotation> <xsd:documentation> A "TextSymbolizer" is used to render text labels according to various graphical parameters. </xsd:documentation> </xsd:annotation> <xsd:complexType> <xsd:complexContent> <xsd:extension base="sld:SymbolizerType"> <xsd:sequence> <xsd:element ref="sld:Geometry" minOccurs="0"/> <xsd:element ref="sld:Label" minOccurs="0"/> <xsd:element ref="sld:Font" minOccurs="0"/> <xsd:element ref="sld:LabelPlacement" minOccurs="0"/> <xsd:element ref="sld:Halo" minOccurs="0"/> <xsd:element ref="sld:Fill" minOccurs="0"/> </xsd:sequence> </xsd:extension> </xsd:complexContent> </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.

$Id$ @author Ian Turton, CCG @source $URL$

        PointSymbolizer notEq = sf.getDefaultPointSymbolizer();
        assertEqualsContract(clone, notEq, pointSymb);
    }


    public void testTextSymbolizer() {
        TextSymbolizer textSymb = sf.createTextSymbolizer();
        Expression offset = ff.literal(10);
        textSymb.setLabelPlacement(sf.createLinePlacement(offset));


        textSymb.accept(visitor);
        TextSymbolizer clone = (TextSymbolizer) visitor.getCopy();
        assertCopy(textSymb, clone);
        assertEqualsContract(textSymb, clone);
        
        TextSymbolizer notEq = sf.getDefaultTextSymbolizer();
        Expression ancX = ff.literal(10);
        Expression ancY = ff.literal(10);
        AnchorPoint ancPoint = sf.createAnchorPoint(ancX, ancY);
        LabelPlacement placement = sf.createPointPlacement(ancPoint,
                null, null);
        notEq.setLabelPlacement(placement);
        assertEqualsContract(clone, notEq, textSymb);
    }

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        notEq.setLabelPlacement(placement);
        assertEqualsContract(clone, notEq, textSymb);
    }
    
    public void testTextSymbolizerVendorParams() {
        TextSymbolizer textSymb = sf.createTextSymbolizer();
        textSymb.getOptions().put("autoWrap", "100");
        
        textSymb.accept(visitor);
        TextSymbolizer clone = (TextSymbolizer) visitor.getCopy();
        assertCopy(textSymb, clone);
        assertEqualsContract(textSymb, clone);
        
        assertEquals(1, clone.getOptions().size());
        assertEquals("100", clone.getOptions().get("autoWrap"));
    }

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        assertEquals(1, clone.getOptions().size());
        assertEquals("100", clone.getOptions().get("autoWrap"));
    }
    
    public void testTextSymbolizerVendorOptions() {
        TextSymbolizer textSymb = sf.createTextSymbolizer();
        textSymb.getOptions().put("autoWrap", "100");


        textSymb.accept(visitor);
        TextSymbolizer clone = (TextSymbolizer) visitor.getCopy();
        assertCopy(textSymb, clone);
        assertEqualsContract(textSymb, clone);
    }

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        assertCopy(textSymb, clone);
        assertEqualsContract(textSymb, clone);
    }


    public void testTextSymbolizerWithUOM() {
        TextSymbolizer textSymb = sf.createTextSymbolizer();
        textSymb.setUnitOfMeasure(UomOgcMapping.METRE.getUnit());
        Expression offset = ff.literal(10);
        textSymb.setLabelPlacement(sf.createLinePlacement(offset));


        textSymb.accept(visitor);
        TextSymbolizer clone = (TextSymbolizer) visitor.getCopy();
        assertCopy(textSymb, clone);
        assertEqualsContract(textSymb, clone);


        TextSymbolizer notEq = sf.getDefaultTextSymbolizer();
        Expression ancX = ff.literal(10);
        Expression ancY = ff.literal(10);
        AnchorPoint ancPoint = sf.createAnchorPoint(ancX, ancY);
        LabelPlacement placement = sf.createPointPlacement(ancPoint,
                null, null);
        notEq.setLabelPlacement(placement);
        assertEqualsContract(clone, notEq, textSymb);
    }

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        assertEquals("Any Expression set as Geometry must be correctly replicated", geomFunc, copy
                .getGeometry());
    }


    public void testTextSymbolizerWithGeometryFunction() {
        TextSymbolizer symb = sf.createTextSymbolizer();


        // Set a function as geometry
        Function geomFunc = ff.function("centroid", ff.property("the_geom"));
        symb.setGeometry(geomFunc);


        TextSymbolizer copy = (TextSymbolizer) visitor.copy(symb);


        // compare it
        assertEquals("Any Expression set as Geometry must be correctly replicated", geomFunc, copy
                .getGeometry());
    }

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         * @param hints
         * @throws OperationNotSupportedException
         */
        public Object getValue( Element element, ElementValue[] value, Attributes attrs1, Map hints )
                throws OperationNotSupportedException {
            TextSymbolizer symbol = StyleFactoryFinder.createStyleFactory().createTextSymbolizer();
            symbol.setFill(null);
            
            ArrayList fonts = new ArrayList();
            
            for (int i = 0; i < value.length; i++) {
                if ((value[i] == null) || value[i].getElement() == null) {
                    continue;
                }
                Element e = value[i].getElement();
                if(elems[GEOMETRY].getName().equals(e.getName()))
                    symbol.setGeometryPropertyName((String)value[i].getValue());
    
                if(elems[FILL].getName().equals(e.getName()))
                    symbol.setFill((Fill)value[i].getValue());
    
                if(elems[LABEL].getName().equals(e.getName()))
                    symbol.setLabel((Expression)value[i].getValue());
    
                if(elems[FONT].getName().equals(e.getName()))
                    fonts.add(value[i].getValue());
    
                if(elems[LABELPLACEMENT].getName().equals(e.getName()))
                    symbol.setFill((Fill)value[i].getValue());
    
                if(elems[LABELPLACEMENT].getName().equals(e.getName()))
                    symbol.setLabelPlacement((LabelPlacement)value[i].getValue());
    
                if(elems[HALO].getName().equals(e.getName()))
                    symbol.setHalo((Halo)value[i].getValue());
            }
            
            symbol.setFonts((Font[]) fonts.toArray(new Font[0]));
            
            return symbol;
        }

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     */
    public Object parse(ElementInstance instance, Node node, Object value)
        throws Exception {
        Color color = (Color) value;


        TextSymbolizer textSymbolizer = sb.createTextSymbolizer();
        textSymbolizer.setFill(sb.createFill(color));


        return textSymbolizer;
    }

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        for (int m = 0; m < length; m++) {
            LOGGER.finer(new StringBuffer("applying symbolizer ").append(
                    symbolizers[m]).toString());


            if (symbolizers[m] instanceof TextSymbolizer) {
                TextSymbolizer ts = (TextSymbolizer) symbolizers[m];
                Expression ex = ts.getLabel();
                featureLabel.append((String) ex.evaluate(feature, String.class)); // attach
                // the lable title


                Style2D style = styleFactory.createStyle(feature,
                        symbolizers[m], scaleRange);

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            } else if (vectorResult) {
                // TODO: come back and sort out crs transformation
                // CoordinateReferenceSystem crs = findGeometryCS(feature,
                // symbolizers[m]);
                if (symbolizers[m] instanceof TextSymbolizer) {
                    TextSymbolizer ts = (TextSymbolizer) symbolizers[m];
                    Expression ex = ts.getLabel();
                    String value = (String) ex.evaluate(feature, String.class);
                    title.append(value);


                    Style2D style = styleFactory.createStyle(feature,
                            symbolizers[m], scaleRange);

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            write(styleString.toString());
        } else if (style instanceof TextStyle2D
                && sym instanceof TextSymbolizer) {
            final StringBuffer styleString = new StringBuffer();
            TextSymbolizer textSym = (TextSymbolizer) sym;


            styleString.append("<LabelStyle><color>");


            if (textSym.getFill() != null) {
                int opacity = 255;


                if (textSym.getFill().getOpacity() != null) {
                    float op = getOpacity(textSym.getFill().getOpacity());
                    opacity = (new Float(255 * op)).intValue();
                }


                Paint p = ((TextStyle2D) style).getFill();

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