Package org.pentaho.reporting.libraries.libsparklines

Class 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 Detail

      • LineGraphDrawable

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

    • Method Detail

      • 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.