Class BasicTicker

Method Details

• createRule

  public abstract BasicTicker.Rule createRule(double dlo, double dhi, double approxMajorCount, int adjust)

  Returns a new rule for labelling an axis in a given range. The tick density is determined by two parameters, approxMajorCount, which gives a baseline value for the number of ticks required over the given range, and adjust. Increasing adjust will give more major ticks, and decreasing it will give fewer ticks. Each value of adjust should result in a different tick count.

  Parameters:

  dlo - minimum axis data value

  dhi - maximum axis data value

  approxMajorCount - guide value for number of major ticks in range

  adjust - adjusts density of major ticks, zero is normal

• getTicks

  public TickRun getTicks(double dlo, double dhi, boolean withMinor, Captioner captioner, Orientation[] orients, int npix, double crowding)

  Description copied from interface: Ticker

  Generates tick marks for labelling a plot axis.

  The supplied list of orientations is attempted in order; if the required crowding can be satisfied by any of them, that orientation will be used. If it can't be supplied by any (because of unavoidable label overlap) a lower crowding value may be used.

  Specified by:

  getTicks in interface Ticker

  Parameters:

  dlo - minimum axis data value

  dhi - maximum axis data value

  withMinor - if true minor axes are included, if false only major (labelled) ones are

  captioner - caption painter

  orients - array of label orientations in order of preference, must contain at least one element

  npix - number of pixels along the axis

  crowding - 1 for normal tick density on the axis, lower for fewer labels, higher for more

  Returns:

  tick array along with orientation actually used

• createHybridTicker

  public static Ticker createHybridTicker(Scale scale, double linthresh)

  Returns a ticker instance that is linear within a given distance of the origin and logarithmic or negative logarithmic for larger absolute values.

  Parameters:

  scale - axis scaling

  linthresh - distance from origin within which ticks are linear

  Returns:

  new ticker

• getMajorTicks

  public static Tick[] getMajorTicks(BasicTicker.Rule rule, double dlo, double dhi)

  Use a given rule to generate major ticks in a given range of coordinates.

  Parameters:

  rule - tick generation rule

  dlo - minimum axis data value

  dhi - maximum axis data value

  Returns:

  array of major ticks

• getMinorTicks

  public static Tick[] getMinorTicks(BasicTicker.Rule rule, double dlo, double dhi)

  Use a given rule to generate minor ticks in a given range of coordinates.

  Parameters:

  rule - tick generation rule

  dlo - minimum axis data value

  dhi - maximum axis data value

  Returns:

  array of minor ticks

• linearLabel

  public static Caption linearLabel(long mantissa, int exp)

  Generates a major tick mark label suitable for use with linear axes. Some care is required assembling the label, to make sure we avoid rounding issues (like 0.999999999999). Double.toString() is not good enough.

  Parameters:

  mantissa - multiplier

  exp - power of 10

  Returns:

  tick label text

• overlaps

  public static boolean overlaps(Tick[] ticks, Axis axis, Captioner captioner, Orientation orient)

  Determines whether the labels for a set of tick marks would overlap when painted on a given axis.

  Parameters:

  ticks - major tick marks

  axis - axis on which the ticks will be drawn

  captioner - caption painter

  orient - label orientation

  Returns:

  true iff some of the ticks are so close to each other that their labels will overlap