Examples of com.positive.charts.renderer.category.CategoryItemRenderer

Package com.positive.charts.renderer.category

Examples of com.positive.charts.renderer.category.CategoryItemRenderer

com.positive.charts.renderer.category.CategoryItemRenderer
A plug-in object that is used by the {@link CategoryPlot} class to displayindividual data items from a {@link CategoryDataset}.
This interface defines the methods that must be provided by all renderers. If you are implementing a custom renderer, you should consider extending the {@link AbstractCategoryItemRenderer} class.
Most renderer attributes are defined using a "three layer" approach. When looking up an attribute (for example, the outline paint) the renderer first checks to see if there is a setting (in layer 0) that applies to ALL items that the renderer draws. If there is, that setting is used, but if it is null the renderer looks up the next layer, which contains "per series" settings for the attribute (many attributes are defined on a per series basis, so this is the layer that is most commonly used). If the layer 1 setting is null, the renderer will look up the final layer, which provides a default or "base" setting. Some attributes allow the base setting to be null, while other attributes enforce non- null values.

            final int columnCount = data.getColumnCount();
            for (int c = 0; c < columnCount; c++) {
              final double xx = axis.getCategoryJava2DCoordinate(
                  anchor, c, columnCount, dataArea,
                  domainAxisEdge);
              final CategoryItemRenderer renderer1 = this
                  .getRenderer();
              if (renderer1 != null) {
                renderer1.drawDomainGridline(g2, this,
                    dataArea, xx);
              }
            }
          }
        }

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   *            the layer (foreground or background).
   */
  protected void drawDomainMarkers(final GC g2, final Rectangle dataArea,
      final int index, final Layer layer) {


    final CategoryItemRenderer r = this.getRenderer(index);
    if (r == null) {
      return;
    }


    final Collection markers = this.getDomainMarkers(index, layer);
    final CategoryAxis axis = this.getDomainAxisForDataset(index);
    if ((markers != null) && (axis != null)) {
      final Iterator iterator = markers.iterator();
      while (iterator.hasNext()) {
        final CategoryMarker marker = (CategoryMarker) iterator.next();
        r.drawDomainMarker(g2, this, axis, marker, dataArea);
      }
    }


  }

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        final ValueAxis axis = this.getRangeAxis();
        if (axis != null) {
          final Iterator iterator = ticks.iterator();
          while (iterator.hasNext()) {
            final ValueTick tick = (ValueTick) iterator.next();
            final CategoryItemRenderer renderer1 = this
                .getRenderer();
            if (renderer1 != null) {
              renderer1.drawRangeGridline(g2, this, this
                  .getRangeAxis(), dataArea, tick.getValue());
            }
          }
        }
      }

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   *            the layer (foreground or background).
   */
  protected void drawRangeMarkers(final GC g2, final Rectangle dataArea,
      final int index, final Layer layer) {


    final CategoryItemRenderer r = this.getRenderer(index);
    if (r == null) {
      return;
    }


    final Collection markers = this.getRangeMarkers(index, layer);
    final ValueAxis axis = this.getRangeAxisForDataset(index);
    if ((markers != null) && (axis != null)) {
      final Iterator iterator = markers.iterator();
      while (iterator.hasNext()) {
        final Marker marker = (Marker) iterator.next();
        r.drawRangeMarker(g2, this, axis, marker, dataArea);
      }
    }


  }

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    // iterate through the datasets that map to the axis and get the union
    // of the ranges.
    final Iterator iterator = mappedDatasets.iterator();
    while (iterator.hasNext()) {
      final CategoryDataset d = (CategoryDataset) iterator.next();
      final CategoryItemRenderer r = this.getRendererForDataset(d);
      if (r != null) {
        result = Range.combine(result, r.findRangeBounds(d));
      }
    }
    return result;


  }

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      // get the legend items for the datasets...
      final int count = this.datasets.size();
      for (int datasetIndex = 0; datasetIndex < count; datasetIndex++) {
        final CategoryDataset dataset = this.getDataset(datasetIndex);
        if (dataset != null) {
          final CategoryItemRenderer renderer = this
              .getRenderer(datasetIndex);
          if (renderer != null) {
            final int seriesCount = dataset.getRowCount();
            for (int i = 0; i < seriesCount; i++) {
              final LegendItem item = renderer.getLegendItem(
                  datasetIndex, i);
              if (item != null) {
                result.add(item);
              }
            }

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   *            the renderer index.
   * 
   * @return The renderer (possibly <code>null</code>).
   */
  public CategoryItemRenderer getRenderer(final int index) {
    CategoryItemRenderer result = null;
    if (this.renderers.size() > index) {
      result = (CategoryItemRenderer) this.renderers.get(index);
    }
    return result;
  }

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   * 
   * @return The renderer (possibly <code>null</code>).
   */
  public CategoryItemRenderer getRendererForDataset(
      final CategoryDataset dataset) {
    CategoryItemRenderer result = null;
    for (int i = 0; i < this.datasets.size(); i++) {
      if (this.datasets.get(i) == dataset) {
        result = (CategoryItemRenderer) this.renderers.get(i);
        break;
      }

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  public boolean render(final GC g2, final Rectangle dataArea,
      final int index, final PlotRenderingInfo info) {


    boolean foundData = false;
    final CategoryDataset currentDataset = this.getDataset(index);
    final CategoryItemRenderer renderer = this.getRenderer(index);
    final CategoryAxis domainAxis = this.getDomainAxisForDataset(index);
    final ValueAxis rangeAxis = this.getRangeAxisForDataset(index);
    final boolean hasData = !DatasetUtilities.isEmptyOrNull(currentDataset);
    if (hasData && (renderer != null)) {


      foundData = true;
      final CategoryItemRendererState state = renderer.initialise(g2,
          dataArea, this, index, info);
      final int columnCount = currentDataset.getColumnCount();
      final int rowCount = currentDataset.getRowCount();
      final int passCount = renderer.getPassCount();
      for (int pass = 0; pass < passCount; pass++) {
        if (this.columnRenderingOrder == SortOrder.ASCENDING) {
          for (int column = 0; column < columnCount; column++) {
            if (this.rowRenderingOrder == SortOrder.ASCENDING) {
              for (int row = 0; row < rowCount; row++) {
                renderer.drawItem(g2, state, dataArea, this,
                    domainAxis, rangeAxis, currentDataset,
                    row, column, pass);
              }
            } else {
              for (int row = rowCount - 1; row >= 0; row--) {
                renderer.drawItem(g2, state, dataArea, this,
                    domainAxis, rangeAxis, currentDataset,
                    row, column, pass);
              }
            }
          }
        } else {
          for (int column = columnCount - 1; column >= 0; column--) {
            if (this.rowRenderingOrder == SortOrder.ASCENDING) {
              for (int row = 0; row < rowCount; row++) {
                renderer.drawItem(g2, state, dataArea, this,
                    domainAxis, rangeAxis, currentDataset,
                    row, column, pass);
              }
            } else {
              for (int row = rowCount - 1; row >= 0; row--) {
                renderer.drawItem(g2, state, dataArea, this,
                    domainAxis, rangeAxis, currentDataset,
                    row, column, pass);
              }
            }
          }

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   */
  public void setRenderer(final int index,
      final CategoryItemRenderer renderer, final boolean notify) {


    // stop listening to the existing renderer...
    final CategoryItemRenderer existing = (CategoryItemRenderer) this.renderers
        .get(index);
    if (existing != null) {
      existing.removeChangeListener(this);
    }


    // register the new renderer...
    this.renderers.set(index, renderer);
    if (renderer != null) {

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Related Classes of com.positive.charts.renderer.category.CategoryItemRenderer

com.positive.charts.plot.CategoryPlot

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