Package org.jfree.chart.plot

Class PolarPlot

java.lang.Object
org.jfree.chart.plot.Plot
org.jfree.chart.plot.PolarPlot
All Implemented Interfaces:
Serializable, Cloneable, EventListener, AnnotationChangeListener, AxisChangeListener, MarkerChangeListener, RendererChangeListener, LegendItemSource, ValueAxisPlot, Zoomable, PublicCloneable, DatasetChangeListener
public class PolarPlot extends Plot implements ValueAxisPlot, Zoomable, RendererChangeListener, Cloneable, Serializable
Plots data that is in (theta, radius) pairs where theta equal to zero is due north and increases clockwise.
See Also:

  • Field Details

  • Constructor Details

    • PolarPlot

      public PolarPlot()
      Default constructor.

    • PolarPlot

      public PolarPlot(XYDataset dataset, ValueAxis radiusAxis, PolarItemRenderer renderer)
      Creates a new plot.
      Parameters:
      dataset - the dataset (null permitted).
      radiusAxis - the radius axis (null permitted).
      renderer - the renderer (null permitted).

  • Method Details

    • getPlotType

      public String getPlotType()
      Returns the plot type as a string.
      Specified by:
      getPlotType in class Plot
      Returns:
      A short string describing the type of plot.

    • getAxis

      public ValueAxis getAxis()
      Returns the primary axis for the plot.
      Returns:
      The primary axis (possibly null).
      See Also:

    • getAxis

      public ValueAxis getAxis(int index)
      Returns an axis for the plot.
      Parameters:
      index - the axis index.
      Returns:
      The axis (null possible).
      See Also:

    • setAxis

      public void setAxis(ValueAxis axis)
      Sets the primary axis for the plot and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      axis - the new primary axis (null permitted).

    • setAxis

      public void setAxis(int index, ValueAxis axis)
      Sets an axis for the plot and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      index - the axis index.
      axis - the axis (null permitted).
      See Also:

    • setAxis

      public void setAxis(int index, ValueAxis axis, boolean notify)
      Sets an axis for the plot and, if requested, sends a PlotChangeEvent to all registered listeners.
      Parameters:
      index - the axis index.
      axis - the axis (null permitted).
      notify - notify listeners?
      See Also:

    • getAxisLocation

      public PolarAxisLocation getAxisLocation()
      Returns the location of the primary axis.
      Returns:
      The location (never null).
      See Also:

    • getAxisLocation

      public PolarAxisLocation getAxisLocation(int index)
      Returns the location for an axis.
      Parameters:
      index - the axis index.
      Returns:
      The location (never null).
      See Also:

    • setAxisLocation

      public void setAxisLocation(PolarAxisLocation location)
      Sets the location of the primary axis and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      location - the location (null not permitted).
      See Also:

    • setAxisLocation

      public void setAxisLocation(PolarAxisLocation location, boolean notify)
      Sets the location of the primary axis and, if requested, sends a PlotChangeEvent to all registered listeners.
      Parameters:
      location - the location (null not permitted).
      notify - notify listeners?
      See Also:

    • setAxisLocation

      public void setAxisLocation(int index, PolarAxisLocation location)
      Sets the location for an axis and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      index - the axis index.
      location - the location (null not permitted).
      See Also:

    • setAxisLocation

      public void setAxisLocation(int index, PolarAxisLocation location, boolean notify)
      Sets the axis location for an axis and, if requested, sends a PlotChangeEvent to all registered listeners.
      Parameters:
      index - the axis index.
      location - the location (null not permitted).
      notify - notify listeners?

    • getAxisCount

      public int getAxisCount()
      Returns the number of domain axes.
      Returns:
      The axis count.

    • getDataset

      public XYDataset getDataset()
      Returns the primary dataset for the plot.
      Returns:
      The primary dataset (possibly null).
      See Also:

    • getDataset

      public XYDataset getDataset(int index)
      Returns the dataset with the specified index, if any.
      Parameters:
      index - the dataset index.
      Returns:
      The dataset (possibly null).
      See Also:

    • setDataset

      public void setDataset(XYDataset dataset)
      Sets the primary dataset for the plot, replacing the existing dataset if there is one, and sends a link PlotChangeEvent to all registered listeners.
      Parameters:
      dataset - the dataset (null permitted).
      See Also:

    • setDataset

      public void setDataset(int index, XYDataset dataset)
      Sets a dataset for the plot, replacing the existing dataset at the same index if there is one, and sends a link PlotChangeEvent to all registered listeners.
      Parameters:
      index - the dataset index.
      dataset - the dataset (null permitted).
      See Also:

    • getDatasetCount

      public int getDatasetCount()
      Returns the number of datasets.
      Returns:
      The number of datasets.

    • indexOf

      public int indexOf(XYDataset dataset)
      Returns the index of the specified dataset, or -1 if the dataset does not belong to the plot.
      Parameters:
      dataset - the dataset (null not permitted).
      Returns:
      The index.

    • getRenderer

      public PolarItemRenderer getRenderer()
      Returns the primary renderer.
      Returns:
      The renderer (possibly null).
      See Also:

    • getRenderer

      public PolarItemRenderer getRenderer(int index)
      Returns the renderer at the specified index, if there is one.
      Parameters:
      index - the renderer index.
      Returns:
      The renderer (possibly null).
      See Also:

    • setRenderer

      public void setRenderer(PolarItemRenderer renderer)
      Sets the primary renderer, and notifies all listeners of a change to the plot. If the renderer is set to null, no data items will be drawn for the corresponding dataset.
      Parameters:
      renderer - the new renderer (null permitted).
      See Also:

    • setRenderer

      public void setRenderer(int index, PolarItemRenderer renderer)
      Sets a renderer and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      index - the index.
      renderer - the renderer.
      See Also:

    • setRenderer

      public void setRenderer(int index, PolarItemRenderer renderer, boolean notify)
      Sets a renderer and, if requested, sends a PlotChangeEvent to all registered listeners.
      Parameters:
      index - the index.
      renderer - the renderer.
      notify - notify listeners?
      See Also:

    • getAngleTickUnit

      public TickUnit getAngleTickUnit()
      Returns the tick unit that controls the spacing of the angular grid lines.
      Returns:
      The tick unit (never null).

    • setAngleTickUnit

      public void setAngleTickUnit(TickUnit unit)
      Sets the tick unit that controls the spacing of the angular grid lines, and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      unit - the tick unit (null not permitted).

    • getAngleOffset

      public double getAngleOffset()
      Returns the offset that is used for all angles.
      Returns:
      The offset for the angles.

    • setAngleOffset

      public void setAngleOffset(double offset)
      Sets the offset that is used for all angles and sends a PlotChangeEvent to all registered listeners. This is useful to let 0 degrees be at the north, east, south or west side of the chart.
      Parameters:
      offset - The offset

    • isCounterClockwise

      public boolean isCounterClockwise()
      Get the direction for growing angle degrees.
      Returns:
      true if angle increases counterclockwise, false otherwise.

    • setCounterClockwise

      public void setCounterClockwise(boolean counterClockwise)
      Sets the flag for increasing angle degrees direction. true for counterclockwise, false for clockwise.
      Parameters:
      counterClockwise - The flag.

    • isAngleLabelsVisible

      public boolean isAngleLabelsVisible()
      Returns a flag that controls whether or not the angle labels are visible.
      Returns:
      A boolean.
      See Also:

    • setAngleLabelsVisible

      public void setAngleLabelsVisible(boolean visible)
      Sets the flag that controls whether or not the angle labels are visible, and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      visible - the flag.
      See Also:

    • getAngleLabelFont

      public Font getAngleLabelFont()
      Returns the font used to display the angle labels.
      Returns:
      A font (never null).
      See Also:

    • setAngleLabelFont

      public void setAngleLabelFont(Font font)
      Sets the font used to display the angle labels and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      font - the font (null not permitted).
      See Also:

    • getAngleLabelPaint

      public Paint getAngleLabelPaint()
      Returns the paint used to display the angle labels.
      Returns:
      A paint (never null).
      See Also:

    • setAngleLabelPaint

      public void setAngleLabelPaint(Paint paint)
      Sets the paint used to display the angle labels and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      paint - the paint (null not permitted).

    • isAngleGridlinesVisible

      public boolean isAngleGridlinesVisible()
      Returns true if the angular gridlines are visible, and false otherwise.
      Returns:
      true or false.
      See Also:

    • setAngleGridlinesVisible

      public void setAngleGridlinesVisible(boolean visible)
      Sets the flag that controls whether or not the angular grid-lines are visible.

      If the flag value is changed, a PlotChangeEvent is sent to all registered listeners.

      Parameters:
      visible - the new value of the flag.
      See Also:

    • getAngleGridlineStroke

      public Stroke getAngleGridlineStroke()
      Returns the stroke for the grid-lines (if any) plotted against the angular axis.
      Returns:
      The stroke (possibly null).
      See Also:

    • setAngleGridlineStroke

      public void setAngleGridlineStroke(Stroke stroke)
      Sets the stroke for the grid lines plotted against the angular axis and sends a PlotChangeEvent to all registered listeners.

      If you set this to null, no grid lines will be drawn.

      Parameters:
      stroke - the stroke (null permitted).
      See Also:

    • getAngleGridlinePaint

      public Paint getAngleGridlinePaint()
      Returns the paint for the grid lines (if any) plotted against the angular axis.
      Returns:
      The paint (possibly null).
      See Also:

    • setAngleGridlinePaint

      public void setAngleGridlinePaint(Paint paint)
      Sets the paint for the grid lines plotted against the angular axis.

      If you set this to null, no grid lines will be drawn.

      Parameters:
      paint - the paint (null permitted).
      See Also:

    • isRadiusGridlinesVisible

      public boolean isRadiusGridlinesVisible()
      Returns true if the radius axis grid is visible, and false otherwise.
      Returns:
      true or false.
      See Also:

    • setRadiusGridlinesVisible

      public void setRadiusGridlinesVisible(boolean visible)
      Sets the flag that controls whether or not the radius axis grid lines are visible.

      If the flag value is changed, a PlotChangeEvent is sent to all registered listeners.

      Parameters:
      visible - the new value of the flag.
      See Also:

    • getRadiusGridlineStroke

      public Stroke getRadiusGridlineStroke()
      Returns the stroke for the grid lines (if any) plotted against the radius axis.
      Returns:
      The stroke (possibly null).
      See Also:

    • setRadiusGridlineStroke

      public void setRadiusGridlineStroke(Stroke stroke)
      Sets the stroke for the grid lines plotted against the radius axis and sends a PlotChangeEvent to all registered listeners.

      If you set this to null, no grid lines will be drawn.

      Parameters:
      stroke - the stroke (null permitted).
      See Also:

    • getRadiusGridlinePaint

      public Paint getRadiusGridlinePaint()
      Returns the paint for the grid lines (if any) plotted against the radius axis.
      Returns:
      The paint (possibly null).
      See Also:

    • setRadiusGridlinePaint

      public void setRadiusGridlinePaint(Paint paint)
      Sets the paint for the grid lines plotted against the radius axis and sends a PlotChangeEvent to all registered listeners.

      If you set this to null, no grid lines will be drawn.

      Parameters:
      paint - the paint (null permitted).
      See Also:

    • isRadiusMinorGridlinesVisible

      public boolean isRadiusMinorGridlinesVisible()
      Return the current value of the flag indicating if radial minor grid-lines will be drawn or not.
      Returns:
      Returns true if radial minor grid-lines are drawn.

    • setRadiusMinorGridlinesVisible

      public void setRadiusMinorGridlinesVisible(boolean flag)
      Set the flag that determines if radial minor grid-lines will be drawn, and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      flag - true to draw the radial minor grid-lines, false to hide them.

    • getMargin

      public int getMargin()
      Returns the margin around the plot area.
      Returns:
      The actual margin in pixels.

    • setMargin

      public void setMargin(int margin)
      Set the margin around the plot area and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      margin - The new margin in pixels.

    • getFixedLegendItems

      public LegendItemCollection getFixedLegendItems()
      Returns the fixed legend items, if any.
      Returns:
      The legend items (possibly null).
      See Also:

    • setFixedLegendItems

      public void setFixedLegendItems(LegendItemCollection items)
      Sets the fixed legend items for the plot. Leave this set to null if you prefer the legend items to be created automatically.
      Parameters:
      items - the legend items (null permitted).
      See Also:

    • addCornerTextItem

      public void addCornerTextItem(String text)
      Add text to be displayed in the lower right hand corner and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      text - the text to display (null not permitted).
      See Also:

    • removeCornerTextItem

      public void removeCornerTextItem(String text)
      Remove the given text from the list of corner text items and sends a PlotChangeEvent to all registered listeners.
      Parameters:
      text - the text to remove (null ignored).
      See Also:

    • clearCornerTextItems

      public void clearCornerTextItems()
      Clear the list of corner text items and sends a PlotChangeEvent to all registered listeners.
      See Also:

    • refreshAngleTicks

      protected List refreshAngleTicks()
      Generates a list of tick values for the angular tick marks.
      Returns:
      A list of NumberTick instances.

    • calculateTextAnchor

      protected TextAnchor calculateTextAnchor(double angleDegrees)
      Calculate the text position for the given degrees.
      Parameters:
      angleDegrees - the angle in degrees.
      Returns:
      The optimal text anchor.

    • mapDatasetToAxis

      public void mapDatasetToAxis(int index, int axisIndex)
      Maps a dataset to a particular axis. All data will be plotted against axis zero by default, no mapping is required for this case.
      Parameters:
      index - the dataset index (zero-based).
      axisIndex - the axis index.

    • mapDatasetToAxes

      public void mapDatasetToAxes(int index, List axisIndices)
      Maps the specified dataset to the axes in the list. Note that the conversion of data values into Java2D space is always performed using the first axis in the list.
      Parameters:
      index - the dataset index (zero-based).
      axisIndices - the axis indices (null permitted).

    • getAxisForDataset

      public ValueAxis getAxisForDataset(int index)
      Returns the axis for a dataset.
      Parameters:
      index - the dataset index.
      Returns:
      The axis.

    • getAxisIndex

      public int getAxisIndex(ValueAxis axis)
      Returns the index of the given axis.
      Parameters:
      axis - the axis.
      Returns:
      The axis index or -1 if axis is not used in this plot.

    • getIndexOf

      public int getIndexOf(PolarItemRenderer renderer)
      Returns the index of the specified renderer, or -1 if the renderer is not assigned to this plot.
      Parameters:
      renderer - the renderer (null permitted).
      Returns:
      The renderer index.

    • draw

      public void draw(Graphics2D g2, Rectangle2D area, Point2D anchor, PlotState parentState, PlotRenderingInfo info)
      Draws the plot on a Java 2D graphics device (such as the screen or a printer).

      This plot relies on a PolarItemRenderer to draw each item in the plot. This allows the visual representation of the data to be changed easily.

      The optional info argument collects information about the rendering of the plot (dimensions, tooltip information etc). Just pass in null if you do not need this information.

      Specified by:
      draw in class Plot
      Parameters:
      g2 - the graphics device.
      area - the area within which the plot (including axes and labels) should be drawn.
      anchor - the anchor point (null permitted).
      parentState - ignored.
      info - collects chart drawing information (null permitted).

    • drawCornerTextItems

      protected void drawCornerTextItems(Graphics2D g2, Rectangle2D area)
      Draws the corner text items.
      Parameters:
      g2 - the drawing surface.
      area - the area.

    • drawAxis

      protected AxisState drawAxis(ValueAxis axis, PolarAxisLocation location, Graphics2D g2, Rectangle2D plotArea)
      Draws the axis with the specified index.
      Parameters:
      axis - the axis.
      location - the axis location.
      g2 - the graphics target.
      plotArea - the plot area.
      Returns:
      The axis state.

    • render

      protected void render(Graphics2D g2, Rectangle2D dataArea, PlotRenderingInfo info)
      Draws a representation of the data within the dataArea region, using the current m_Renderer.
      Parameters:
      g2 - the graphics device.
      dataArea - the region in which the data is to be drawn.
      info - an optional object for collection dimension information (null permitted).

    • drawGridlines

      protected void drawGridlines(Graphics2D g2, Rectangle2D dataArea, List angularTicks, List radialTicks)
      Draws the gridlines for the plot, if they are visible.
      Parameters:
      g2 - the graphics device.
      dataArea - the data area.
      angularTicks - the ticks for the angular axis.
      radialTicks - the ticks for the radial axis.

    • buildRadialTicks

      protected List buildRadialTicks(List allTicks)
      Create a list of ticks based on the given list and plot properties. Only ticks of a specific type may be in the result list.
      Parameters:
      allTicks - A list of all available ticks for the primary axis. null not permitted.
      Returns:
      Ticks to use for radial gridlines.

    • zoom

      public void zoom(double percent)
      Zooms the axis ranges by the specified percentage about the anchor point.
      Overrides:
      zoom in class Plot
      Parameters:
      percent - the amount of the zoom.

    • getDataRange

      public Range getDataRange(ValueAxis axis)
      Returns the range for the specified axis.
      Specified by:
      getDataRange in interface ValueAxisPlot
      Parameters:
      axis - the axis.
      Returns:
      The range.

    • datasetChanged

      public void datasetChanged(DatasetChangeEvent event)
      Receives notification of a change to the plot's m_Dataset.

      The axis ranges are updated if necessary.

      Specified by:
      datasetChanged in interface DatasetChangeListener
      Overrides:
      datasetChanged in class Plot
      Parameters:
      event - information about the event (not used here).

    • rendererChanged

      public void rendererChanged(RendererChangeEvent event)
      Notifies all registered listeners of a property change.

      One source of property change events is the plot's m_Renderer.

      Specified by:
      rendererChanged in interface RendererChangeListener
      Parameters:
      event - information about the property change.

    • getLegendItems

      public LegendItemCollection getLegendItems()
      Returns the legend items for the plot. Each legend item is generated by the plot's m_Renderer, since the m_Renderer is responsible for the visual representation of the data.
      Specified by:
      getLegendItems in interface LegendItemSource
      Overrides:
      getLegendItems in class Plot
      Returns:
      The legend items.

    • equals

      public boolean equals(Object obj)
      Tests this plot for equality with another object.
      Overrides:
      equals in class Plot
      Parameters:
      obj - the object (null permitted).
      Returns:
      true or false.

    • clone

      public Object clone() throws CloneNotSupportedException
      Returns a clone of the plot.
      Specified by:
      clone in interface PublicCloneable
      Overrides:
      clone in class Plot
      Returns:
      A clone.
      Throws:
      CloneNotSupportedException - this can occur if some component of the plot cannot be cloned.

    • zoomDomainAxes

      public void zoomDomainAxes(double factor, PlotRenderingInfo state, Point2D source)
      This method is required by the Zoomable interface, but since the plot does not have any domain axes, it does nothing.
      Specified by:
      zoomDomainAxes in interface Zoomable
      Parameters:
      factor - the zoom factor.
      state - the plot state.
      source - the source point (in Java2D coordinates).
      See Also:

    • zoomDomainAxes

      public void zoomDomainAxes(double factor, PlotRenderingInfo state, Point2D source, boolean useAnchor)
      This method is required by the Zoomable interface, but since the plot does not have any domain axes, it does nothing.
      Specified by:
      zoomDomainAxes in interface Zoomable
      Parameters:
      factor - the zoom factor.
      state - the plot state.
      source - the source point (in Java2D coordinates).
      useAnchor - use source point as zoom anchor?
      See Also:

    • zoomDomainAxes

      public void zoomDomainAxes(double lowerPercent, double upperPercent, PlotRenderingInfo state, Point2D source)
      This method is required by the Zoomable interface, but since the plot does not have any domain axes, it does nothing.
      Specified by:
      zoomDomainAxes in interface Zoomable
      Parameters:
      lowerPercent - the new lower bound.
      upperPercent - the new upper bound.
      state - the plot state.
      source - the source point (in Java2D coordinates).
      See Also:

    • zoomRangeAxes

      public void zoomRangeAxes(double factor, PlotRenderingInfo state, Point2D source)
      Multiplies the range on the range axis/axes by the specified factor.
      Specified by:
      zoomRangeAxes in interface Zoomable
      Parameters:
      factor - the zoom factor.
      state - the plot state.
      source - the source point (in Java2D coordinates).
      See Also:

    • zoomRangeAxes

      public void zoomRangeAxes(double factor, PlotRenderingInfo info, Point2D source, boolean useAnchor)
      Multiplies the range on the range axis by the specified factor.
      Specified by:
      zoomRangeAxes in interface Zoomable
      Parameters:
      factor - the zoom factor.
      info - the plot rendering info.
      source - the source point (in Java2D space).
      useAnchor - use source point as zoom anchor?
      See Also:

    • zoomRangeAxes

      public void zoomRangeAxes(double lowerPercent, double upperPercent, PlotRenderingInfo state, Point2D source)
      Zooms in on the range axes.
      Specified by:
      zoomRangeAxes in interface Zoomable
      Parameters:
      lowerPercent - the new lower bound.
      upperPercent - the new upper bound.
      state - the plot state.
      source - the source point (in Java2D coordinates).
      See Also:

    • isDomainZoomable

      public boolean isDomainZoomable()
      Returns false always.
      Specified by:
      isDomainZoomable in interface Zoomable
      Returns:
      false always.
      See Also:

    • isRangeZoomable

      public boolean isRangeZoomable()
      Returns true to indicate that the range axis is zoomable.
      Specified by:
      isRangeZoomable in interface Zoomable
      Returns:
      true.
      See Also:

    • getOrientation

      public PlotOrientation getOrientation()
      Returns the orientation of the plot.
      Specified by:
      getOrientation in interface Zoomable
      Returns:
      The orientation.

    • translateToJava2D

      public Point translateToJava2D(double angleDegrees, double radius, ValueAxis axis, Rectangle2D dataArea)
      Translates a (theta, radius) pair into Java2D coordinates. If radius is less than the lower bound of the axis, then this method returns the centre point.
      Parameters:
      angleDegrees - the angle in degrees.
      radius - the radius.
      axis - the axis.
      dataArea - the data area.
      Returns:
      A point in Java2D space.