Package eu.webtoolkit.jwt.chart

Class WDataSeries

java.lang.Object
eu.webtoolkit.jwt.WObject
eu.webtoolkit.jwt.chart.WDataSeries
public class WDataSeries extends WObject
A single data series in a cartesian chart.

This class configures all aspects for rendering a single data series in a cartesian chart. A data series renders Y data from a single model column against the X series configured for the chart.

The data column should contain data that can be converted to a number, but should not necessarily be of a number type, see also StringUtils.asNumber(Object).

Multiple series of different types may be combined on a single chart.

Different styles of data series

For a category chart, series may be stacked on top of each other. This is controlled by setStacked() for a series, which if enabled, will stack that series on top of the preceding data series. This works regardless of whether they are of the same type, but obviously works visually best if these series are of the same type. When not stacked, bar series are rendered next to each other. The margin between bars of different data series is controlled using WCartesianChart#setBarMargin().

The line and color type are by default based on the chart palette, but may be overridden for a series using setPen(), setBrush(), etc...

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  • Constructor Details

    • WDataSeries

      public WDataSeries(int modelColumn, SeriesType type, Axis axis)
      Constructs a new data series.

      Creates a new data series which plots the Y values from the model column modelColumn, with the indicated seriesType. The Y values are mapped to the indicated axis, which should correspond to one of the two Y axes.

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    • WDataSeries

      public WDataSeries(int modelColumn)
      Constructs a new data series.

      Calls this(modelColumn, SeriesType.Point, Axis.Y1)

    • WDataSeries

      public WDataSeries(int modelColumn, SeriesType type)
      Constructs a new data series.

      Calls this(modelColumn, type, Axis.Y1)

    • WDataSeries

      public WDataSeries(int modelColumn, SeriesType type, int axis)
      Constructs a new data series.

      Creates a new data series which plots the Y values from the model column modelColumn, with the indicated seriesType. The Y values are mapped to the indicated yAxis, which should correspond to one of the two Y axes.

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  • Method Details

    • setBarWidth

      public void setBarWidth(double width)
      Sets the bar width.

      The bar width specifies the bar width (in axis dimensions). For category plots, which may have several bars for different series next to each other, you will want to specify the same bar width for each series.

      For scatter plots, you may want to set the bar width to a natural size. E.g. if you are plotting weekly measurements, you could set the width to correspond to a week (=7).

      The default value is 0.8 (which leaves a 20% margin between bars for different categories in a category chart.

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    • getBarWidth

      public double getBarWidth()
      Returns the bar width.

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    • setType

      public void setType(SeriesType type)
      Sets the series type.

      The series type specifies how the data is plotted, i.e. using mere point markers, lines, curves, or bars.

    • getType

      public SeriesType getType()
      Returns the series type.

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    • setModelColumn

      public void setModelColumn(int modelColumn)
      Sets the model column.

      This specifies the model column from which the Y data is retrieved that is plotted by this series.

      The data column should contain data that can be converted to a number (but should not necessarily be of a number type). See also StringUtils.asNumber(Object).

    • getModelColumn

      public int getModelColumn()
      Returns the model column.

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    • setXSeriesColumn

      public void setXSeriesColumn(int modelColumn)
      Sets the X series column.

      By default, the data series uses the X series column configured for the chart. For a scatter plot, each series can have its own matching X data, which is configured here. For other plots, this setting is ignored.

      The default value is -1, which indicates that WCartesianChart.XSeriesColumn() is to be used.

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    • XSeriesColumn

      public int XSeriesColumn()
      Returns the X series column.

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    • setStacked

      public void setStacked(boolean stacked)
      Sets whether this series is stacked on top of the preceding series.

      For category charts, data from different series may be rendered stacked on top of each other. The rendered value is the sum of the value of this series plus the rendered value of the preceding series. For line series, you probably will want to add filling under the curve. A stacked bar series is rendered by a bar on top of the preceding bar series.

      The default value is false.

    • isStacked

      public boolean isStacked()
      Returns whether this series is stacked on top of the preceding series.

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    • bindToAxis

      public void bindToAxis(Axis axis)
      Binds this series to a chart axis.

      A data series may be bound to either the first or second Y axis. Note that the second Y axis is by default not displayed.

      The default value is the first Y axis.

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    • bindToXAxis

      public void bindToXAxis(int xAxis)
      Binds this series to a chart's X axis.

      Note that the second Y axis will not be displayed by default.

      The default value is the first X axis.

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    • bindToYAxis

      public void bindToYAxis(int yAxis)
      Binds this series to a chart's Y axis.

      Note that the second Y axis will not be displayed by default.

      The default value is the first Y axis.

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    • getAxis

      public Axis getAxis()
      Returns the Y axis used for this series.

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    • getXAxis

      public int getXAxis()
      Returns the Y axis used for this series.

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    • getYAxis

      public int getYAxis()
      Returns the Y axis used for this series.

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    • setCustomFlags

      public void setCustomFlags(EnumSet<CustomFlag> flags)
      Sets which aspects of the look are overriden.

      Set which aspects of the look, that are by default based on the chart palette, are overridden by custom settings.

      The default value is 0 (nothing overridden).

    • setCustomFlags

      public final void setCustomFlags(CustomFlag flag, CustomFlag... flags)
      Sets which aspects of the look are overriden.

      Calls setCustomFlags(EnumSet.of(flag, flags))

    • getCustomFlags

      public EnumSet<CustomFlag> getCustomFlags()
      Returns which aspects of the look are overriden.

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    • setPen

      public void setPen(WPen pen)
      Overrides the pen used for drawing lines for this series.

      Overrides the pen that is used to draw this series. Calling this method automatically adds CustomPen to the custom flags.

      The default value is a default WPen().

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    • getPen

      public WPen getPen()
      Returns the pen used for drawing lines for this series.

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    • setBrush

      public void setBrush(WBrush brush)
      Overrides the brush used for filling areas for this series.

      Overrides the brush that is used to draw this series which is otherwise provided by the chart palette. For a bar plot, this is the brush used to fill the bars. For a line chart, this is the brush used to fill the area under (or above) the line. Calling this method automatically adds CustomBrush to the custom flags.

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    • getBrush

      public WBrush getBrush()
      Returns the brush used for filling areas for this series.

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    • setShadow

      public void setShadow(WShadow shadow)
      Sets a shadow used for stroking lines for this series.

    • getShadow

      public WShadow getShadow()
      Returns the shadow used for stroking lines for this series.

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    • setFillRange

      public void setFillRange(FillRangeType fillRange)
      Sets the fill range for line or curve series.

      Line or curve series may be filled under or above the curve, using the getBrush(). This setting specifies the range that is filled. The default value for all but SeriesType.Bar is FillRangeType.None.

      Bar series may use FillRangeType.MinimumValue to configure the chart to render its bars from the data point to the bottom of the chart or FillRangeType.MaximumValue to render the bars from the data point to the top of the chart. The default value for SeriesType.Bar is FillRangeType.ZeroValue, which render bars from zero to the data value.

    • getFillRange

      public FillRangeType getFillRange()
      Returns the fill range (for line, curve and bar series).

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    • setMarker

      public void setMarker(MarkerType marker)
      Sets the data point marker.

      Specifies a marker that is displayed at the (X,Y) coordinate for each series data point.

      The default value is a MarkerType.Circle for a SeriesType.Point, or MarkerType.None otherwise.

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    • setCustomMarker

      public void setCustomMarker(WPainterPath path)
      Sets the custom marker.

      This will also changes the marker type to MarkerType.Custom.

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    • getCustomMarker

      public WPainterPath getCustomMarker()
      Returns the custom marker.

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    • getMarker

      public MarkerType getMarker()
      Returns the data point marker.

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    • setMarkerSize

      public void setMarkerSize(double size)
      Sets the marker size.

      The default marker size is 6 pixels.

    • getMarkerSize

      public double getMarkerSize()
      Returns the marker size.

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    • setMarkerPen

      public void setMarkerPen(WPen pen)
      Sets the marker pen.

      Overrides the pen used for stroking the marker. By default the marker pen is the same as getPen(). Calling this method automatically adds CustomMarkerPen to the custom flags.

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    • getMarkerPen

      public WPen getMarkerPen()
      Returns the marker pen.

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    • setMarkerBrush

      public void setMarkerBrush(WBrush brush)
      Sets the marker brush.

      Overrides the brush used for filling the marker. By default the marker brush is the same as getBrush(). Calling this method automatically adds CustomMarkerBrush to the custom flags.

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    • getMarkerBrush

      public WBrush getMarkerBrush()
      Returns the marker brush.

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    • setLegendEnabled

      public void setLegendEnabled(boolean enabled)
      Enables the entry for this series in the legend.

      When enabled, this series is added to the chart legend.

      The default value is true.

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    • isLegendEnabled

      public boolean isLegendEnabled()
      Returns whether this series has an entry in the legend.

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    • setLabelsEnabled

      public void setLabelsEnabled(Axis axis, boolean enabled)
      Enables a label that is shown at the series data points.

      You may enable labels for the Axis.X, Axis.Y or both axes. The label that is displayed is the corresponding value on that axis. If both labels are enabled then they are combined in a single text using the format: "<x-value>: <y-value>".

      The default values are false for both axes (no labels).

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    • setLabelsEnabled

      public final void setLabelsEnabled(Axis axis)
      Enables a label that is shown at the series data points.

      Calls setLabelsEnabled(axis, true)

    • isLabelsEnabled

      public boolean isLabelsEnabled(Axis axis)
      Returns whether labels are enabled for the given axis.

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    • setLabelColor

      public void setLabelColor(WColor color)
      Sets the label color.

      Specify the color used for the rendering labels at the data points.

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    • getLabelColor

      public WColor getLabelColor()
      Returns the label color.

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    • setHidden

      public void setHidden(boolean hidden)
      Hide/unhide this series.

      A hidden series will not be show in the chart and legend.

    • isHidden

      public boolean isHidden()
      Return whether the series is hidden.

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    • mapFromDevice

      public WPointF mapFromDevice(WPointF deviceCoordinates)
      Maps from device coordinates to model coordinates.

      Maps a position in the chart back to model coordinates, for data in this data series.

      This uses WChart::mapFromDevice() passing the getAxis() to which this series is bound.

      This method uses the axis dimensions that are based on the latest chart rendering. If you have not yet rendered the chart, or wish to already the mapping reflect model changes since the last rendering, you should call WCartesianChart#initLayout() first.

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    • mapToDevice

      public WPointF mapToDevice(Object xValue, Object yValue, int segment)
      Maps from model values to device coordinates.

      Maps model values to device coordinates, for data in this data series.

      This uses WChart::mapToDevice() passing the getAxis() to which this series is bound.

      This method uses the axis dimensions that are based on the latest chart rendering. If you have not yet rendered the chart, or wish to already the mapping reflect model changes since the last rendering, you should call WCartesianChart#initLayout() first.

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    • mapToDevice

      public final WPointF mapToDevice(Object xValue, Object yValue)
      Maps from model values to device coordinates.

      Returns mapToDevice(xValue, yValue, 0)

    • setOffset

      public void setOffset(double offset)
      Set an offset to draw the data series at.

      The Y position of the data series will be drawn at an offset, expressed in model coordinates. The axis labels won't follow the same offset.

      The offset can be manipulated client side using a mouse or touch drag if WCartesianChart.isCurveManipulationEnabled() is enabled.

      Note: This is only supported for axes with linear scale.

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    • getOffset

      public double getOffset()
      Get the offset for this data series.

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    • setScale

      public void setScale(double scale)
      Set the scale to draw the data series at.

      The Y position of the data series will be scaled around the zero position, and offset by getOffset().

      The scale can be manipulated client side using the scroll wheel or a pinch motion if WCartesianChart.isCurveManipulationEnabled() is enabled.

      Note: This is only supported for axes with linear scale.

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    • getScale

      public double getScale()
      Get the scale for this data series.

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    • setModel

      public void setModel(WAbstractChartModel model)
      Set a model for this data series.

      If no model is set for this data series, the model of the chart will be used.

      Note: Individual models per data series are only supported for ChartType.Scatter type charts.

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    • getModel

      public WAbstractChartModel getModel()
      Get the model for this data series.

      This will return the model set for this data series, if it is set.

      If no model is set for this data series, and the series is associated with a chart, the model of the chart is returned.

      If no model is set for this data series, and the series is not associated with any data series, this will return null.

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    • getChart

      public WCartesianChart getChart()