Example usage for org.jfree.chart.axis DateTickUnit getCalendarField

Introduction

In this page you can find the example usage for org.jfree.chart.axis DateTickUnit getCalendarField.

Prototype

public int getCalendarField() 

Source Link

Document

Returns a field code that can be used with the Calendar class.

Usage

From source file:figs.treeVisualization.gui.PhyloDateAxis.java

/**
 * Returns the previous "standard" date, for a given date and tick unit.
 *
 * @param date  the reference date./*from   w w  w .  ja v  a 2 s.  c  o  m*/
 * @param unit  the tick unit.
 *
 * @return The previous "standard" date.
 */
@Override
protected Date previousStandardDate(Date date, DateTickUnit unit) {

    int hours;
    int days;
    int months;
    int years;

    Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
    calendar.setTime(getMinimumDate());
    int current = calendar.get(unit.getCalendarField());

    // We only care about DAY, MONTH, YEAR
    DateTickMarkPosition tickMarkPosition = this.getTickMarkPosition();
    switch (unit.getUnit()) {
    case (DateTickUnit.DAY):
        years = calendar.get(Calendar.YEAR);
        months = calendar.get(Calendar.MONTH);

        if (tickMarkPosition == DateTickMarkPosition.START) {
            hours = 0;
        } else if (tickMarkPosition == DateTickMarkPosition.MIDDLE) {
            hours = 12;
        } else {
            hours = 23;
        }
        calendar.clear(Calendar.MILLISECOND);
        calendar.set(years, months, current, hours, 0, 0);

        long result = calendar.getTime().getTime();
        if (result > date.getTime()) {
            // move it back a day
            calendar.set(years, months, current - 1, hours, 0, 0);
        }
        return calendar.getTime();
    case (DateTickUnit.MONTH):
        years = calendar.get(Calendar.YEAR);
        calendar.clear(Calendar.MILLISECOND);
        calendar.set(years, current, 1, 0, 0, 0);
        // TODO:
        /*
        Month month = new Month(calendar.getTime());
        Date standardDate = calculateDateForPosition(
            month, tickMarkPosition
        );
        long millis = standardDate.getTime();
        if (millis > date.getTime()) {
            month = (Month) month.previous();
            standardDate = calculateDateForPosition(
                month, tickMarkPosition
            );
        }
        return standardDate;
        */
        return calendar.getTime();
    case (DateTickUnit.YEAR):
        if (tickMarkPosition == DateTickMarkPosition.START) {
            months = 0;
            days = 1;
        } else if (tickMarkPosition == DateTickMarkPosition.MIDDLE) {
            months = 6;
            days = 1;
        } else {
            months = 11;
            days = 31;
        }
        calendar.clear(Calendar.MILLISECOND);
        calendar.set(current, months, days, 0, 0, 0);
        return calendar.getTime();
    default:
        return calendar.getTime();
    }

}

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