Example usage for org.jfree.chart.entity EntityCollection addAll

Introduction

In this page you can find the example usage for org.jfree.chart.entity EntityCollection addAll.

Prototype

public void addAll(EntityCollection collection);

Source Link

Document

Adds the entities from another collection to this collection.

Usage

From source file:net.sourceforge.processdash.ui.web.CGIChartBase.java

private void writeImageHtml(int width, int height, int imgID, ChartRenderingInfo info) throws IOException {
    String tooltip = getParameter("tooltip");
    if (!StringUtils.hasValue(tooltip))
        tooltip = resources.getHTML("More_Detail_Here_Instruction");

    String href = getParameter("href");
    if (StringUtils.hasValue(href)) {
        // create a copy of the entity collection, and place an entity for
        // the entire chart at the beginning of the list.  This will
        // make it appear last in the image map (which is important,
        // because browsers process the image map areas in the order that
        // they appear; having the entire chart area listed first would
        // obscure all of the other image map areas).
        EntityCollection entities = new StandardEntityCollection();
        entities.add(new ChartEntity(info.getChartArea(), tooltip, href));
        if (info.getEntityCollection() != null)
            entities.addAll(info.getEntityCollection());

        // Next: most of our chart entities will not have URLs. URL values
        // don't inherit in the imagemap, so if we want the entire image
        // to have a single URL, we need to assign that URL to every
        // area in the chart.
        for (Iterator i = entities.iterator(); i.hasNext();) {
            ChartEntity ce = (ChartEntity) i.next();
            // check for no-op chart entity - these won't appear in the
            // image map anyway, so they don't need to be adjusted
            if (ce.getToolTipText() == null && ce.getURLText() == null)
                continue;
            // for other entities, add a tooltip and a URL as needed.
            if (!StringUtils.hasValue(ce.getToolTipText()))
                ce.setToolTipText(tooltip);
            if (!StringUtils.hasValue(ce.getURLText()))
                ce.setURLText(href);/*w w w . j  av a  2s .c o m*/
        }

        // install our modified version of the entity collection into
        // the chart info object, so it will be used when generating
        // the image map later.
        info.setEntityCollection(entities);
    }

    // write the image tag
    out.write("<img width=\"" + width + "\" height=\"" + height + "\" src=\"/reports/pngCache?id=" + imgID
            + "\" usemap=\"#IMG" + imgID + '"');

    // imagemaps have hyperlink borders by default, even if we don't
    // have a URL we're pointing to.  Turn that border off.
    if (!StringUtils.hasValue(href) || parameters.containsKey("noBorder"))
        out.write(" border=\"0\"");

    // Our client might want to add attributes to the image tag. Look
    // through the query parameters we received for arbitrary attributes
    // starting with the prefix "img", and copy them into the tag.
    for (Iterator i = parameters.entrySet().iterator(); i.hasNext();) {
        Map.Entry e = (Map.Entry) i.next();
        String attrName = (String) e.getKey();
        if (attrName.startsWith("img") && !attrName.endsWith("_ALL")) {
            out.write(" " + attrName.substring(3) + "=\"");
            out.write(HTMLUtils.escapeEntities(e.getValue().toString()));
            out.write('"');
        }
    }

    out.write(">");

    // finally, write the image map.  Note that we have to strip line
    // break characters from the resulting HTML, otherwise firefox seems
    // to decide that the <map> tag actually takes up space on the page
    String imageMapHtml = ImageMapUtilities.getImageMap("IMG" + imgID, info, getToolTipGenerator(tooltip),
            new StandardURLTagFragmentGenerator());
    for (int i = 0; i < imageMapHtml.length(); i++) {
        char c = imageMapHtml.charAt(i);
        if (c != '\r' && c != '\n')
            out.write(c);
    }
    out.flush();
}

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