import org.jfree.chart.entity.PlotEntity; //导入依赖的package包/类
/**
 * The gesture entity type
 * 
 * @param entity
 * @return
 */
public static Entity getGestureEntity(ChartEntity entity) {
  if (entity == null)
    return NONE;
  if (entity instanceof PlotEntity)
    return PLOT;
  if (entity instanceof AxisEntity) {
    AxisEntity e = (AxisEntity) entity;
    if (e.getAxis().getPlot() instanceof XYPlot) {
      XYPlot plot = ((XYPlot) e.getAxis().getPlot());
      for (int i = 0; i < plot.getDomainAxisCount(); i++)
        if (plot.getDomainAxis(i).equals(e.getAxis()))
          return DOMAIN_AXIS;
      for (int i = 0; i < plot.getRangeAxisCount(); i++)
        if (plot.getRangeAxis(i).equals(e.getAxis()))
          return RANGE_AXIS;
    }
    // else return basic axis
    return AXIS;
  }
  if (entity instanceof LegendItemEntity)
    return LEGEND_ITEM;
  if (entity instanceof XYItemEntity)
    return XY_ITEM;
  if (entity instanceof XYAnnotationEntity)
    return XY_ANNOTATION;
  if (entity instanceof TitleEntity) {
    if (((TitleEntity) entity).getTitle() instanceof TextTitle)
      return TEXT_TITLE;
    else
      return NON_TEXT_TITLE;
  }
  if (entity instanceof JFreeChartEntity)
    return JFREECHART;
  if (entity instanceof CategoryItemEntity)
    return CATEGORY_ITEM;
  return GENERAL;
}
 

import org.jfree.chart.entity.PlotEntity; //导入依赖的package包/类
/**
 * Creates a plot entity that contains a reference to the plot and the
 * data area as shape.
 *
 * @param dataArea  the data area used as hot spot for the entity.
 * @param plotState  the plot rendering info containing a reference to the
 *     EntityCollection.
 * @param toolTip  the tool tip (defined in the respective Plot
 *     subclass) (<code>null</code> permitted).
 * @param urlText  the url (defined in the respective Plot subclass)
 *     (<code>null</code> permitted).
 *
 *  @since 1.0.13
 */
protected void createAndAddEntity(Rectangle2D dataArea,
        PlotRenderingInfo plotState, String toolTip, String urlText) {
    if (plotState != null && plotState.getOwner() != null) {
        EntityCollection e = plotState.getOwner().getEntityCollection();
        if (e != null) {
            e.add(new PlotEntity(dataArea, this, toolTip, urlText));
        }
    }
}
 

import org.jfree.chart.entity.PlotEntity; //导入依赖的package包/类
/**
 * Creates a plot entity that contains a reference to the plot and the
 * data area as shape.
 *
 * @param dataArea  the data area used as hot spot for the entity.
 * @param plotState  the plot rendering info containing a reference to the
 *     EntityCollection.
 * @param toolTip  the tool tip (defined in the respective Plot
 *     subclass) ({@code null} permitted).
 * @param urlText  the url (defined in the respective Plot subclass)
 *     ({@code null} permitted).
 *
 *  @since 1.0.13
 */
protected void createAndAddEntity(Rectangle2D dataArea,
        PlotRenderingInfo plotState, String toolTip, String urlText) {
    if (plotState != null && plotState.getOwner() != null) {
        EntityCollection e = plotState.getOwner().getEntityCollection();
        if (e != null) {
            e.add(new PlotEntity(dataArea, this, toolTip, urlText));
        }
    }
}
 

import org.jfree.chart.entity.PlotEntity; //导入依赖的package包/类
/**
    * Creates a plot entity that contains a reference to the plot and the
    * data area as shape.
    *
    * @param dataArea  the data area used as hot spot for the entity.
    * @param plotState  the plot rendering info containing a reference to the
    *     EntityCollection.
    * @param toolTip  the tool tip (defined in the respective Plot
    *     subclass) (<code>null</code> permitted).
    * @param urlText  the url (defined in the respective Plot subclass)
    *     (<code>null</code> permitted).
    *
    *  @since 1.0.13
    */
	protected void createAndAddEntity(Rectangle2D dataArea,
           PlotRenderingInfo plotState, String toolTip, String urlText){
	if (plotState != null && plotState.getOwner() != null) {
		EntityCollection e = plotState.getOwner().getEntityCollection();
		if (e != null) {
               e.add(new PlotEntity(dataArea, this, toolTip, urlText));
           }
	}
}