Labels
Labels annotate data points. As a degenerate case they can be used to place text on a chart without drawing a point. Labels are controlled by the value of the attribute LabelType in a
node.
Multiline labels are allowed.
Attribute LabelType
The attribute LabelType takes on one of the following values:
for no label. This is the default.
label with the value of the
x-coordinate.
label with the value of the y-coordinate.
label with the value of the z-coordinate.
label with the value of the Title attribute.
AxisXYZ
The
AxisXYZ node is the basis of both the scatter chart types and surface chart. Its parent node must be the root
node.
When an AxisXYZ node is created, it creates three
nodes. They can be obtained by using the methods
and
and
. Each of the Axis3D nodes in turn creates additional child nodes, as seen in the diagram below.
Accessor methods can be chained together, so the x-axis line can be retrieved using
axis.getAxisX().getAxisLine()
The code to set the x-axis line to blue is
axis.getAxisX().getAxisLine().setLineColor(Color.blue)
Axis Layout
The layout of an AxisXYZ chart is controlled by the attributes Window and Number.
Attribute Window
Window is a double array-valued attribute that contains the axis limits. Its value is (min, max).
Attribute Number
Number is an integer-valued attribute that contains the number of major tick marks along an axis.
Transform
The x-, y- and z-axes may be linear or logarithmic, as specified by the Transform attribute. This attribute can have the values:
indicating a linear axis. This is the default.
indicating a logarithmic axis.
Autoscale
Autoscaling is used to automatically determine the attribute Window (the range of numbers along an axis) and the attribute Number (the number of major tick marks). The goal is to adjust the attributes so that the data fits on the axes and the axes have “nice” numbers as labels.
Autoscaling is done in two phases. In the first (“input”) phase the actual range is determined. In the second (“output”) phase chart attributes are updated.
Attribute AutoscaleInput
The action of the input phase is controlled by the value of attribute AutoscaleInput in the axis node. It can have one of three values.
turns off autoscaling.
scans the values in the
nodes that are attached to the axis to determine the data range. This is the default value.
uses the value of the
Window attribute to determine the data range.
Attribute AutoscaleOutput
The value of the AutoscaleOutput attribute can be the bitwise combination of the following values.
no attributes updated.
updates the value of the
Number attribute. This is the number of major tick marks along the axis.
updates the value of the
Window attribute. This is the range of numbers displayed along the axis.
The default is AUTOSCALE_NUMBER ∣ AUTOSCALE_WINDOW; both the attributes Number and Window are adjusted.
