Package org.pentaho.reporting.libraries.libsparklines

Class LineGraphDrawable

java.lang.Object
org.pentaho.reporting.libraries.libsparklines.LineGraphDrawable
public class LineGraphDrawable extends Object
A very fast and very simple line-graph drawable. This code is based on the LineGraph class writen by Larry Ogrodnek but instead of producing a low-resolution image, this class writes the content into a Graphics2D context.
Author:
Thomas Morgner

  • Constructor Details

    • LineGraphDrawable

      public LineGraphDrawable()
      Creates a default bargraph drawable with some sensible default colors and spacings.

  • Method Details

    • getData

      public Number[] getData()
      Returns the numeric data for the drawable or null, if the drawable has no data.
      Returns:
      the data.

    • setData

      public void setData(Number[] data)
      Defines the numeric data for the drawable or null, if the drawable has no data.
      Parameters:
      data - the data (can be null).

    • getColor

      public Color getColor()
      Returns the main color for the bars.
      Returns:
      the main color for the bars, never null.

    • setColor

      public void setColor(Color color)
      Defines the main color for the bars.
      Parameters:
      color - the main color for the bars, never null.

    • getBackground

      public Color getBackground()
      Returns the color for the background of the graph. This property can be null, in which case the bar will have a transparent background.
      Returns:
      color for the background or null, if the graph has a transparent background color.

    • setBackground

      public void setBackground(Color background)
      Defines the color for the background of the graph. This property can be null, in which case the bar will have a transparent background.
      Parameters:
      background - the background or null, if the graph has a transparent background color.

    • getSpacing

      public int getSpacing()
      Returns the spacing between the bars.
      Returns:
      the spacing between the bars.

    • setSpacing

      public void setSpacing(int spacing)
      Defines the spacing between the bars.
      Parameters:
      spacing - the spacing between the bars.

    • getLastColor

      public Color getLastColor()

    • setLastColor

      public void setLastColor(Color lastColor)

    • draw

      public void draw(Graphics2D graphics, Rectangle2D drawArea)
      Draws the bar-graph into the given Graphics2D context in the given area. This method will not draw a graph if the data given is null or empty.
      Parameters:
      graphics - the graphics context on which the bargraph should be rendered.
      drawArea - the area on which the bargraph should be drawn.