Examples of org.gephi.preview.api.PreviewProperties

org.gephi.preview.api.PreviewProperties
Container for {@link PreviewProperty} attached to a {@link PreviewModel}.
This class holds all preview properties defined in the model. Each property has a unique name, a type and a value and can be configured by users.
Properties should be added using the addProperty() method before calling putValue() to properly register properties.
Besides holding well-defined properties this class acts also as a map and can store arbitrary (key,value) pairs. All (key,value) pairs are stored when calling the putValue() method but only properties added with the addProperty() method are returned when calling the getProperties() methods. Therefore this class can both be used for fixed properties and temporary variables.
To batch put a set of property values the best way is to create a PreviewPreset and call the applyPreset() method. @author Mathieu Bastian @see PreviewPreset

        //Get the current preview model, little hack to get the current workspace from the graph
        PreviewController previewController = Lookup.getDefault().lookup(PreviewController.class);
        PreviewModel previewModel = previewController.getModel(graph.getGraphModel().getWorkspace());
        
        //Get the sort column from the properties, if any
        PreviewProperties previewProperties = previewModel.getProperties();
        final AttributeColumn sortColumn = previewProperties.getValue(SORT_COLUMN);
        
        //Get the standard node items from the node builder
        Item[] nodeItems = super.getItems(graph, attributeModel);
        if (sortColumn != null) {
            //Sort by column

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        PreviewController controller = Lookup.getDefault().lookup(PreviewController.class);
        controller.getModel(workspace).getProperties().putValue(PreviewProperty.VISIBILITY_RATIO, 1.0);
        controller.refreshPreview(workspace);


        PreviewProperties props = controller.getModel(workspace).getProperties();
        props.putValue("width", width);
        props.putValue("height", height);
        target = (ProcessingTarget) controller.getRenderTarget(RenderTarget.PROCESSING_TARGET, workspace);


        try {
            target.refresh();

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        Progress.start(progress);


        PreviewController controller = Lookup.getDefault().lookup(PreviewController.class);
        controller.getModel(workspace).getProperties().putValue(PreviewProperty.VISIBILITY_RATIO, 1.0);
        controller.refreshPreview(workspace);
        PreviewProperties props = controller.getModel(workspace).getProperties();


        Rectangle size = new Rectangle(pageSize);
        if (landscape) {
            size = new Rectangle(pageSize.rotate());
        }
        Color col = props.getColorValue(PreviewProperty.BACKGROUND_COLOR);
        size.setBackgroundColor(new BaseColor(col.getRed(), col.getGreen(), col.getBlue()));


        Document document = new Document(size);
        PdfWriter pdfWriter = null;
        try {
            pdfWriter = PdfWriter.getInstance(document, stream);
            pdfWriter.setPdfVersion(PdfWriter.PDF_VERSION_1_5);
            pdfWriter.setFullCompression();


        } catch (DocumentException ex) {
            Exceptions.printStackTrace(ex);
        }
        document.open();
        PdfContentByte cb = pdfWriter.getDirectContent();
        cb.saveState();


        props.putValue(PDFTarget.LANDSCAPE, landscape);
        props.putValue(PDFTarget.PAGESIZE, size);
        props.putValue(PDFTarget.MARGIN_TOP, new Float((float) marginTop));
        props.putValue(PDFTarget.MARGIN_LEFT, new Float((float) marginLeft));
        props.putValue(PDFTarget.MARGIN_BOTTOM, new Float((float) marginBottom));
        props.putValue(PDFTarget.MARGIN_RIGHT, new Float((float) marginRight));
        props.putValue(PDFTarget.PDF_CONTENT_BYTE, cb);
        target = (PDFTarget) controller.getRenderTarget(RenderTarget.PDF_TARGET, workspace);
        if (target instanceof LongTask) {
            ((LongTask) target).setProgressTicket(progress);
        }


        try {
            controller.render(target, workspace);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }


        cb.restoreState();
        document.close();


        Progress.finish(progress);


        props.putValue(PDFTarget.PDF_CONTENT_BYTE, null);
        props.putValue(PDFTarget.PAGESIZE, null);


        return !cancel;
    }

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        Progress.start(progress);


        PreviewController controller = Lookup.getDefault().lookup(PreviewController.class);
        controller.getModel(workspace).getProperties().putValue(PreviewProperty.VISIBILITY_RATIO, 1.0);


        PreviewProperties props = controller.getModel(workspace).getProperties();
        props.putValue("width", width);
        props.putValue("height", height);
        Color oldColor = props.getColorValue(PreviewProperty.BACKGROUND_COLOR);
        if (transparentBackground) {
            props.putValue(PreviewProperty.BACKGROUND_COLOR, new Color(255, 255, 255, 0));//White transparent
        }
        props.putValue(PreviewProperty.MARGIN, new Float((float) margin));
        controller.refreshPreview(workspace);
        target = (G2DTarget) controller.getRenderTarget(RenderTarget.G2D_TARGET, workspace);
        if (target instanceof LongTask) {
            ((LongTask) target).setProgressTicket(progress);
        }
        //Fix bug caused by keeping width and height in the workspace preview properties.
        //When a .gephi file is loaded later with these properties PGraphics will be created instead of a PApplet
        props.removeSimpleValue("width");
        props.removeSimpleValue("height");
        props.removeSimpleValue(PreviewProperty.MARGIN);


        try {
            target.refresh();


            Progress.switchToIndeterminate(progress);


            Image sourceImg = target.getImage();
            BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
            img.getGraphics().drawImage(sourceImg, 0, 0, null);
            ImageIO.write(img, "png", stream);
            stream.close();


            props.putValue(PreviewProperty.BACKGROUND_COLOR, oldColor);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }


        Progress.finish(progress);

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    public boolean execute() {
        PreviewController controller = Lookup.getDefault().lookup(PreviewController.class);
        controller.getModel(workspace).getProperties().putValue(PreviewProperty.VISIBILITY_RATIO, 1.0);
        controller.refreshPreview(workspace);
        
        PreviewProperties props = controller.getModel(workspace).getProperties();
        props.putValue(SVGTarget.SCALE_STROKES, scaleStrokes);
        props.putValue(PreviewProperty.MARGIN, new Float((float) margin));
        target = (SVGTarget) controller.getRenderTarget(RenderTarget.SVG_TARGET, workspace);
        if (target instanceof LongTask) {
            ((LongTask) target).setProgressTicket(progress);
        }


        try {
            controller.render(target, workspace);


            // creates SVG-to-SVG transcoder
            SVGTranscoder t = new SVGTranscoder();
            t.addTranscodingHint(SVGTranscoder.KEY_XML_DECLARATION, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>");


            // sets transcoder input and output
            TranscoderInput input = new TranscoderInput(target.getDocument());


            // performs transcoding
            try {
                TranscoderOutput output = new TranscoderOutput(writer);
                t.transcode(input, output);
            } finally {
                writer.close();
                props.removeSimpleValue(PreviewProperty.MARGIN);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

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        double height = previewModel.getDimensions().getHeight();
        width = Math.max(1, width);
        height = Math.max(1, height);
        int topLeftX = previewModel.getTopLeftPosition().x;
        int topLeftY = previewModel.getTopLeftPosition().y;
        PreviewProperties properties = previewModel.getProperties();
        float marginBottom = properties.getFloatValue(PDFTarget.MARGIN_BOTTOM);
        float marginLeft = properties.getFloatValue(PDFTarget.MARGIN_LEFT);
        float marginRight = properties.getFloatValue(PDFTarget.MARGIN_RIGHT);
        float marginTop = properties.getFloatValue(PDFTarget.MARGIN_TOP);
        Rectangle pageSize = properties.getValue(PDFTarget.PAGESIZE);
        boolean landscape = properties.getBooleanValue(PDFTarget.LANDSCAPE);
        PdfContentByte cb = properties.getValue(PDFTarget.PDF_CONTENT_BYTE);
        PDFRenderTargetImpl renderTarget = new PDFRenderTargetImpl(cb, width, height, topLeftX, topLeftY,
                pageSize, marginLeft, marginRight, marginTop, marginBottom, landscape);
        return renderTarget;
    }

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Related Classes of org.gephi.preview.api.PreviewProperties

org.gephi.io.exporter.preview.PDFExporter

org.gephi.io.exporter.preview.PNGExporter

org.gephi.io.exporter.preview.SVGExporter

org.gephi.plugins.example.exporter.JPGExporter

org.gephi.plugins.example.preview.NodesZOrdering

org.gephi.preview.PDFRenderTargetBuilder

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