Examples with ElkLabel org.eclipse.elk.graph.ElkLabel used on opensource projects

Example 51 with ElkLabel

use of org.eclipse.elk.graph.ElkLabel in project elk by eclipse.

the class LayoutDotExporter method setEdgeLabels.

@Override
protected void setEdgeLabels(final ElkEdge kedge, final List<Attribute> attributes, final boolean isVertical) {
    super.setEdgeLabels(kedge, attributes, isVertical);
    // set label distance and angle
    if (Iterables.any(kedge.getLabels(), (ElkLabel label) -> {
        EdgeLabelPlacement elp = label.getProperty(CoreOptions.EDGE_LABELS_PLACEMENT);
        return elp == EdgeLabelPlacement.HEAD || elp == EdgeLabelPlacement.TAIL;
    })) {
        double distance = kedge.getProperty(GraphvizMetaDataProvider.LABEL_DISTANCE);
        if (distance >= 0.0) {
            attributes.add(createAttribute(Attributes.LABELDISTANCE, distance));
        }
        double angle = kedge.getProperty(GraphvizMetaDataProvider.LABEL_ANGLE);
        attributes.add(createAttribute(Attributes.LABELANGLE, angle));
    }
}

Example 52 with ElkLabel

use of org.eclipse.elk.graph.ElkLabel in project elk by eclipse.

the class DotExporter method applyEdgeLabelPos.

/**
 * Applies the edge label positions for the given edge.
 *
 * @param elkedge edge for which labels are processed
 * @param posString string with label position
 * @param placement label placement to choose
 * @param offsetx x offset added to positions
 * @param offsety y offset added to positions
 */
private void applyEdgeLabelPos(final ElkEdge elkedge, final String posString, final EdgeLabelPlacement placement, final KVector offset) {
    double combinedWidth = 0.0;
    double combinedHeight = 0.0;
    for (ElkLabel label : elkedge.getLabels()) {
        EdgeLabelPlacement elp = label.getProperty(CoreOptions.EDGE_LABELS_PLACEMENT);
        if (elp == placement) {
            combinedWidth = Math.max(combinedWidth, label.getWidth());
            combinedHeight += label.getHeight();
        }
    }
    try {
        KVector pos = new KVector();
        pos.parse(posString);
        double xpos = pos.x - combinedWidth / 2 + offset.x;
        double ypos = pos.y - combinedHeight / 2 + offset.y;
        for (ElkLabel label : elkedge.getLabels()) {
            EdgeLabelPlacement elp = label.getProperty(CoreOptions.EDGE_LABELS_PLACEMENT);
            if (elp == placement) {
                double xoffset = (combinedWidth - label.getWidth()) / 2;
                label.setX(xpos + xoffset);
                label.setY(ypos);
                ypos += label.getHeight();
            }
        }
    } catch (IllegalArgumentException exception) {
    // ignore exception
    }
}

Example 53 with ElkLabel

use of org.eclipse.elk.graph.ElkLabel in project elk by eclipse.

the class DotExporter method setEdgeLabels.

/**
 * Set edge labels for the given edge.
 *
 * @param elkedge edge whose labels shall be set
 * @param attributes edge attribute list to which the labels are added
 * @param isVertical indicates whether vertical layout direction is active
 */
protected void setEdgeLabels(final ElkEdge elkedge, final List<Attribute> attributes, final boolean isVertical) {
    if (elkedge.getLabels().isEmpty()) {
        return;
    }
    // as Graphviz only supports positioning of one label per label placement, all labels
    // are stacked to one big label as workaround
    StringBuilder midLabel = new StringBuilder(), headLabel = new StringBuilder(), tailLabel = new StringBuilder();
    String fontName = null;
    int fontSize = 0;
    boolean isCenterFontName = false, isCenterFontSize = false;
    for (ElkLabel label : elkedge.getLabels()) {
        StringBuilder buffer = midLabel;
        EdgeLabelPlacement placement = label.getProperty(CoreOptions.EDGE_LABELS_PLACEMENT);
        boolean takeFontName = false, takeFontSize = false;
        switch(placement) {
            case HEAD:
                takeFontName = fontName == null;
                takeFontSize = fontSize <= 0;
                buffer = headLabel;
                break;
            case TAIL:
                takeFontName = fontName == null;
                takeFontSize = fontSize <= 0;
                buffer = tailLabel;
                break;
            default:
                // CENTER
                takeFontName = fontName == null || !isCenterFontName;
                isCenterFontName = true;
                takeFontSize = fontSize <= 0 || !isCenterFontSize;
                isCenterFontSize = true;
                break;
        }
        if (buffer.length() > 0) {
            buffer.append("\n");
        }
        buffer.append(label.getText());
        if (takeFontName) {
            fontName = label.getProperty(CoreOptions.FONT_NAME);
        }
        if (takeFontSize) {
            fontSize = label.getProperty(CoreOptions.FONT_SIZE);
            // increase the font size to let Graphviz prepare more room for the label
            if (fontSize > 0) {
                fontSize *= FONT_SIZE_MULT;
            }
        }
    }
    // edge overlapping
    if (midLabel.length() > 0) {
        double labelSpacing = elkedge.getProperty(CoreOptions.SPACING_EDGE_LABEL);
        if (labelSpacing < 1) {
            labelSpacing = 0;
        }
        int charsToAdd = (int) labelSpacing - 1;
        for (int i = 0; i < charsToAdd; i++) {
            midLabel.append(isVertical ? "O" : "\nO");
        }
        attributes.add(createAttribute(Attributes.LABEL, createString(midLabel.toString())));
    }
    // set head label
    if (headLabel.length() > 0) {
        attributes.add(createAttribute(Attributes.HEADLABEL, createString(headLabel.toString())));
    }
    // set tail label
    if (tailLabel.length() > 0) {
        attributes.add(createAttribute(Attributes.TAILLABEL, createString(tailLabel.toString())));
    }
    // set font name
    if (fontName != null && fontName.length() > 0) {
        attributes.add(createAttribute(Attributes.FONTNAME, "\"" + fontName + "\""));
    }
    // set font size
    if (fontSize > 0) {
        attributes.add(createAttribute(Attributes.FONTSIZE, fontSize));
    }
}

Example 54 with ElkLabel

use of org.eclipse.elk.graph.ElkLabel in project elk by eclipse.

the class DotImporter method transformEdge.

/**
 * Transforms an edge.
 *
 * @param statement an edge statement
 * @param parent the parent node
 * @param transData the transformation data instance
 * @param defaultProps default values for edge options
 */
private void transformEdge(final EdgeStatement statement, final ElkNode parent, final IDotTransformationData<GraphvizModel, ElkNode> transData, final IPropertyHolder defaultProps) {
    String sourceName = statement.getSourceNode().getName();
    ElkNode source = transformNode(sourceName, parent, transData);
    ElkPort sourcePort = null;
    if (statement.getSourceNode().getPort() != null) {
        String portName = statement.getSourceNode().getPort().getCompass_pt();
        if (portName == null) {
            portName = statement.getSourceNode().getPort().getName();
        }
        sourcePort = transformPort(portName, source, transData);
    }
    ListIterator<EdgeTarget> targetIter = statement.getEdgeTargets().listIterator();
    while (targetIter.hasNext()) {
        EdgeTarget edgeTarget = targetIter.next();
        ElkEdge elkedge = ElkGraphUtil.createEdge(null);
        if (sourcePort != null) {
            elkedge.getSources().add(sourcePort);
        } else {
            elkedge.getSources().add(source);
        }
        ElkNode target;
        ElkPort targetPort = null;
        Node edgeTargetNode = edgeTarget.getTargetnode();
        String targetName;
        if (edgeTargetNode == null) {
            targetName = edgeTarget.getTargetSubgraph().getName();
            target = transformNode(targetName, parent, transData);
        } else {
            targetName = edgeTargetNode.getName();
            target = transformNode(targetName, parent, transData);
            if (edgeTargetNode.getPort() != null) {
                String portName = edgeTargetNode.getPort().getCompass_pt();
                if (portName == null) {
                    portName = edgeTargetNode.getPort().getName();
                }
                targetPort = transformPort(portName, target, transData);
            }
        }
        if (targetPort != null) {
            elkedge.getTargets().add(targetPort);
        } else {
            elkedge.getTargets().add(target);
        }
        elkedge.copyProperties(defaultProps);
        if (targetIter.previousIndex() == 0) {
            // this is the first target - just store the edge statement
            elkedge.setProperty(PROP_STATEMENT, statement);
        } else {
            // the edge statement has more that one target - create a copy
            EdgeStatement newStatement = DotFactory.eINSTANCE.createEdgeStatement();
            Node sourceNode = DotFactory.eINSTANCE.createNode();
            sourceNode.setName(sourceName);
            newStatement.setSourceNode(sourceNode);
            targetIter.remove();
            newStatement.getEdgeTargets().add(edgeTarget);
            for (Attribute attr : statement.getAttributes()) {
                newStatement.getAttributes().add(EcoreUtil.copy(attr));
            }
            elkedge.setProperty(PROP_STATEMENT, newStatement);
        }
        // evaluate attributes for the new edge
        for (Attribute attr : statement.getAttributes()) {
            String value = trimValue(attr);
            if (Attributes.LABEL.equals(attr.getName())) {
                ElkLabel label = ElkGraphUtil.createLabel(value, elkedge);
                label.setProperty(CoreOptions.EDGE_LABELS_PLACEMENT, EdgeLabelPlacement.CENTER);
            } else if (Attributes.HEADLABEL.equals(attr.getName())) {
                ElkLabel label = ElkGraphUtil.createLabel(value, elkedge);
                label.setProperty(CoreOptions.EDGE_LABELS_PLACEMENT, EdgeLabelPlacement.HEAD);
            } else if (Attributes.TAILLABEL.equals(attr.getName())) {
                ElkLabel label = ElkGraphUtil.createLabel(value, elkedge);
                label.setProperty(CoreOptions.EDGE_LABELS_PLACEMENT, EdgeLabelPlacement.TAIL);
            } else {
                transformAttribute(elkedge, attr, transData);
            }
        }
        // the edge target is the source for the next edge target
        source = target;
        sourceName = targetName;
        sourcePort = targetPort;
    }
}

Example 55 with ElkLabel

use of org.eclipse.elk.graph.ElkLabel in project elk by eclipse.

the class RandomGraphGenerator method addEdgeLabel.

/**
 * Creates a {@link KLabel} with random text and adds it to the edge.
 *
 * @param edge
 *            the edge to add the label to.
 */
private void addEdgeLabel(final ElkEdge edge) {
    ElkLabel label = ElkGraphUtil.createLabel(BlindTextGenerator.generate(), edge);
    edge.getLabels().add(label);
}