jfreechart example source code file (PeriodAxis.java)
The jfreechart PeriodAxis.java source code
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ---------------
* PeriodAxis.java
* ---------------
* (C) Copyright 2004-2009, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 01-Jun-2004 : Version 1 (DG);
* 16-Sep-2004 : Fixed bug in equals() method, added clone() method and
* PublicCloneable interface (DG);
* 25-Nov-2004 : Updates to support major and minor tick marks (DG);
* 25-Feb-2005 : Fixed some tick mark bugs (DG);
* 15-Apr-2005 : Fixed some more tick mark bugs (DG);
* 26-Apr-2005 : Removed LOGGER (DG);
* 16-Jun-2005 : Fixed zooming (DG);
* 15-Sep-2005 : Changed configure() method to check autoRange flag,
* and added ticks to state (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 06-Oct-2006 : Updated for deprecations in RegularTimePeriod and
* subclasses (DG);
* 22-Mar-2007 : Use new defaultAutoRange attribute (DG);
* 31-Jul-2007 : Fix for inverted axis labelling (see bug 1763413) (DG);
* 08-Apr-2008 : Notify listeners in setRange(Range, boolean, boolean) - fixes
* bug 1932146 (DG);
* 16-Jan-2009 : Fixed bug 2490803, a problem in the setRange() method (DG);
* 02-Mar-2009 : Added locale - see patch 2569670 by Benjamin Bignell (DG);
* 02-Mar-2009 : Fixed draw() method to check tickMarksVisible and
* tickLabelsVisible (DG);
*
*/
package org.jfree.chart.axis;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Constructor;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.TimeZone;
import org.jfree.chart.event.AxisChangeEvent;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotRenderingInfo;
import org.jfree.chart.plot.ValueAxisPlot;
import org.jfree.data.Range;
import org.jfree.data.time.Day;
import org.jfree.data.time.Month;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.Year;
import org.jfree.io.SerialUtilities;
import org.jfree.text.TextUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.TextAnchor;
import org.jfree.util.PublicCloneable;
/**
* An axis that displays a date scale based on a
* {@link org.jfree.data.time.RegularTimePeriod}. This axis works when
* displayed across the bottom or top of a plot, but is broken for display at
* the left or right of charts.
*/
public class PeriodAxis extends ValueAxis
implements Cloneable, PublicCloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = 8353295532075872069L;
/** The first time period in the overall range. */
private RegularTimePeriod first;
/** The last time period in the overall range. */
private RegularTimePeriod last;
/**
* The time zone used to convert 'first' and 'last' to absolute
* milliseconds.
*/
private TimeZone timeZone;
/**
* The locale (never <code>null).
*
* @since 1.0.13
*/
private Locale locale;
/**
* A calendar used for date manipulations in the current time zone and
* locale.
*/
private Calendar calendar;
/**
* The {@link RegularTimePeriod} subclass used to automatically determine
* the axis range.
*/
private Class autoRangeTimePeriodClass;
/**
* Indicates the {@link RegularTimePeriod} subclass that is used to
* determine the spacing of the major tick marks.
*/
private Class majorTickTimePeriodClass;
/**
* A flag that indicates whether or not tick marks are visible for the
* axis.
*/
private boolean minorTickMarksVisible;
/**
* Indicates the {@link RegularTimePeriod} subclass that is used to
* determine the spacing of the minor tick marks.
*/
private Class minorTickTimePeriodClass;
/** The length of the tick mark inside the data area (zero permitted). */
private float minorTickMarkInsideLength = 0.0f;
/** The length of the tick mark outside the data area (zero permitted). */
private float minorTickMarkOutsideLength = 2.0f;
/** The stroke used to draw tick marks. */
private transient Stroke minorTickMarkStroke = new BasicStroke(0.5f);
/** The paint used to draw tick marks. */
private transient Paint minorTickMarkPaint = Color.black;
/** Info for each labelling band. */
private PeriodAxisLabelInfo[] labelInfo;
/**
* Creates a new axis.
*
* @param label the axis label.
*/
public PeriodAxis(String label) {
this(label, new Day(), new Day());
}
/**
* Creates a new axis.
*
* @param label the axis label (<code>null permitted).
* @param first the first time period in the axis range
* (<code>null not permitted).
* @param last the last time period in the axis range
* (<code>null not permitted).
*/
public PeriodAxis(String label,
RegularTimePeriod first, RegularTimePeriod last) {
this(label, first, last, TimeZone.getDefault(), Locale.getDefault());
}
/**
* Creates a new axis.
*
* @param label the axis label (<code>null permitted).
* @param first the first time period in the axis range
* (<code>null not permitted).
* @param last the last time period in the axis range
* (<code>null not permitted).
* @param timeZone the time zone (<code>null not permitted).
*
* @deprecated As of version 1.0.13, you should use the constructor that
* specifies a Locale also.
*/
public PeriodAxis(String label,
RegularTimePeriod first, RegularTimePeriod last,
TimeZone timeZone) {
this(label, first, last, timeZone, Locale.getDefault());
}
/**
* Creates a new axis.
*
* @param label the axis label (<code>null permitted).
* @param first the first time period in the axis range
* (<code>null not permitted).
* @param last the last time period in the axis range
* (<code>null not permitted).
* @param timeZone the time zone (<code>null not permitted).
* @param locale the locale (<code>null not permitted).
*
* @since 1.0.13
*/
public PeriodAxis(String label, RegularTimePeriod first,
RegularTimePeriod last, TimeZone timeZone, Locale locale) {
super(label, null);
if (timeZone == null) {
throw new IllegalArgumentException("Null 'timeZone' argument.");
}
if (locale == null) {
throw new IllegalArgumentException("Null 'locale' argument.");
}
this.first = first;
this.last = last;
this.timeZone = timeZone;
this.locale = locale;
this.calendar = Calendar.getInstance(timeZone, locale);
this.first.peg(this.calendar);
this.last.peg(this.calendar);
this.autoRangeTimePeriodClass = first.getClass();
this.majorTickTimePeriodClass = first.getClass();
this.minorTickMarksVisible = false;
this.minorTickTimePeriodClass = RegularTimePeriod.downsize(
this.majorTickTimePeriodClass);
setAutoRange(true);
this.labelInfo = new PeriodAxisLabelInfo[2];
this.labelInfo[0] = new PeriodAxisLabelInfo(Month.class,
new SimpleDateFormat("MMM", locale));
this.labelInfo[1] = new PeriodAxisLabelInfo(Year.class,
new SimpleDateFormat("yyyy", locale));
}
/**
* Returns the first time period in the axis range.
*
* @return The first time period (never <code>null).
*/
public RegularTimePeriod getFirst() {
return this.first;
}
/**
* Sets the first time period in the axis range and sends an
* {@link AxisChangeEvent} to all registered listeners.
*
* @param first the time period (<code>null not permitted).
*/
public void setFirst(RegularTimePeriod first) {
if (first == null) {
throw new IllegalArgumentException("Null 'first' argument.");
}
this.first = first;
this.first.peg(this.calendar);
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the last time period in the axis range.
*
* @return The last time period (never <code>null).
*/
public RegularTimePeriod getLast() {
return this.last;
}
/**
* Sets the last time period in the axis range and sends an
* {@link AxisChangeEvent} to all registered listeners.
*
* @param last the time period (<code>null not permitted).
*/
public void setLast(RegularTimePeriod last) {
if (last == null) {
throw new IllegalArgumentException("Null 'last' argument.");
}
this.last = last;
this.last.peg(this.calendar);
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the time zone used to convert the periods defining the axis
* range into absolute milliseconds.
*
* @return The time zone (never <code>null).
*/
public TimeZone getTimeZone() {
return this.timeZone;
}
/**
* Sets the time zone that is used to convert the time periods into
* absolute milliseconds.
*
* @param zone the time zone (<code>null not permitted).
*/
public void setTimeZone(TimeZone zone) {
if (zone == null) {
throw new IllegalArgumentException("Null 'zone' argument.");
}
this.timeZone = zone;
this.calendar = Calendar.getInstance(zone, this.locale);
this.first.peg(this.calendar);
this.last.peg(this.calendar);
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the locale for this axis.
*
* @return The locale (never (<code>null).
*
* @since 1.0.13
*/
public Locale getLocale() {
return this.locale;
}
/**
* Returns the class used to create the first and last time periods for
* the axis range when the auto-range flag is set to <code>true.
*
* @return The class (never <code>null).
*/
public Class getAutoRangeTimePeriodClass() {
return this.autoRangeTimePeriodClass;
}
/**
* Sets the class used to create the first and last time periods for the
* axis range when the auto-range flag is set to <code>true and
* sends an {@link AxisChangeEvent} to all registered listeners.
*
* @param c the class (<code>null not permitted).
*/
public void setAutoRangeTimePeriodClass(Class c) {
if (c == null) {
throw new IllegalArgumentException("Null 'c' argument.");
}
this.autoRangeTimePeriodClass = c;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the class that controls the spacing of the major tick marks.
*
* @return The class (never <code>null).
*/
public Class getMajorTickTimePeriodClass() {
return this.majorTickTimePeriodClass;
}
/**
* Sets the class that controls the spacing of the major tick marks, and
* sends an {@link AxisChangeEvent} to all registered listeners.
*
* @param c the class (a subclass of {@link RegularTimePeriod} is
* expected).
*/
public void setMajorTickTimePeriodClass(Class c) {
if (c == null) {
throw new IllegalArgumentException("Null 'c' argument.");
}
this.majorTickTimePeriodClass = c;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the flag that controls whether or not minor tick marks
* are displayed for the axis.
*
* @return A boolean.
*/
public boolean isMinorTickMarksVisible() {
return this.minorTickMarksVisible;
}
/**
* Sets the flag that controls whether or not minor tick marks
* are displayed for the axis, and sends a {@link AxisChangeEvent}
* to all registered listeners.
*
* @param visible the flag.
*/
public void setMinorTickMarksVisible(boolean visible) {
this.minorTickMarksVisible = visible;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the class that controls the spacing of the minor tick marks.
*
* @return The class (never <code>null).
*/
public Class getMinorTickTimePeriodClass() {
return this.minorTickTimePeriodClass;
}
/**
* Sets the class that controls the spacing of the minor tick marks, and
* sends an {@link AxisChangeEvent} to all registered listeners.
*
* @param c the class (a subclass of {@link RegularTimePeriod} is
* expected).
*/
public void setMinorTickTimePeriodClass(Class c) {
if (c == null) {
throw new IllegalArgumentException("Null 'c' argument.");
}
this.minorTickTimePeriodClass = c;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the stroke used to display minor tick marks, if they are
* visible.
*
* @return A stroke (never <code>null).
*/
public Stroke getMinorTickMarkStroke() {
return this.minorTickMarkStroke;
}
/**
* Sets the stroke used to display minor tick marks, if they are
* visible, and sends a {@link AxisChangeEvent} to all registered
* listeners.
*
* @param stroke the stroke (<code>null not permitted).
*/
public void setMinorTickMarkStroke(Stroke stroke) {
if (stroke == null) {
throw new IllegalArgumentException("Null 'stroke' argument.");
}
this.minorTickMarkStroke = stroke;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the paint used to display minor tick marks, if they are
* visible.
*
* @return A paint (never <code>null).
*/
public Paint getMinorTickMarkPaint() {
return this.minorTickMarkPaint;
}
/**
* Sets the paint used to display minor tick marks, if they are
* visible, and sends a {@link AxisChangeEvent} to all registered
* listeners.
*
* @param paint the paint (<code>null not permitted).
*/
public void setMinorTickMarkPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.minorTickMarkPaint = paint;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the inside length for the minor tick marks.
*
* @return The length.
*/
public float getMinorTickMarkInsideLength() {
return this.minorTickMarkInsideLength;
}
/**
* Sets the inside length of the minor tick marks and sends an
* {@link AxisChangeEvent} to all registered listeners.
*
* @param length the length.
*/
public void setMinorTickMarkInsideLength(float length) {
this.minorTickMarkInsideLength = length;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns the outside length for the minor tick marks.
*
* @return The length.
*/
public float getMinorTickMarkOutsideLength() {
return this.minorTickMarkOutsideLength;
}
/**
* Sets the outside length of the minor tick marks and sends an
* {@link AxisChangeEvent} to all registered listeners.
*
* @param length the length.
*/
public void setMinorTickMarkOutsideLength(float length) {
this.minorTickMarkOutsideLength = length;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Returns an array of label info records.
*
* @return An array.
*/
public PeriodAxisLabelInfo[] getLabelInfo() {
return this.labelInfo;
}
/**
* Sets the array of label info records and sends an
* {@link AxisChangeEvent} to all registered listeners.
*
* @param info the info.
*/
public void setLabelInfo(PeriodAxisLabelInfo[] info) {
this.labelInfo = info;
notifyListeners(new AxisChangeEvent(this));
}
/**
* Sets the range for the axis, if requested, sends an
* {@link AxisChangeEvent} to all registered listeners. As a side-effect,
* the auto-range flag is set to <code>false (optional).
*
* @param range the range (<code>null not permitted).
* @param turnOffAutoRange a flag that controls whether or not the auto
* range is turned off.
* @param notify a flag that controls whether or not listeners are
* notified.
*/
public void setRange(Range range, boolean turnOffAutoRange,
boolean notify) {
long upper = Math.round(range.getUpperBound());
long lower = Math.round(range.getLowerBound());
this.first = createInstance(this.autoRangeTimePeriodClass,
new Date(lower), this.timeZone, this.locale);
this.last = createInstance(this.autoRangeTimePeriodClass,
new Date(upper), this.timeZone, this.locale);
super.setRange(new Range(this.first.getFirstMillisecond(),
this.last.getLastMillisecond() + 1.0), turnOffAutoRange,
notify);
}
/**
* Configures the axis to work with the current plot. Override this method
* to perform any special processing (such as auto-rescaling).
*/
public void configure() {
if (this.isAutoRange()) {
autoAdjustRange();
}
}
/**
* Estimates the space (height or width) required to draw the axis.
*
* @param g2 the graphics device.
* @param plot the plot that the axis belongs to.
* @param plotArea the area within which the plot (including axes) should
* be drawn.
* @param edge the axis location.
* @param space space already reserved.
*
* @return The space required to draw the axis (including pre-reserved
* space).
*/
public AxisSpace reserveSpace(Graphics2D g2, Plot plot,
Rectangle2D plotArea, RectangleEdge edge,
AxisSpace space) {
// create a new space object if one wasn't supplied...
if (space == null) {
space = new AxisSpace();
}
// if the axis is not visible, no additional space is required...
if (!isVisible()) {
return space;
}
// if the axis has a fixed dimension, return it...
double dimension = getFixedDimension();
if (dimension > 0.0) {
space.ensureAtLeast(dimension, edge);
}
// get the axis label size and update the space object...
Rectangle2D labelEnclosure = getLabelEnclosure(g2, edge);
double labelHeight = 0.0;
double labelWidth = 0.0;
double tickLabelBandsDimension = 0.0;
for (int i = 0; i < this.labelInfo.length; i++) {
PeriodAxisLabelInfo info = this.labelInfo[i];
FontMetrics fm = g2.getFontMetrics(info.getLabelFont());
tickLabelBandsDimension
+= info.getPadding().extendHeight(fm.getHeight());
}
if (RectangleEdge.isTopOrBottom(edge)) {
labelHeight = labelEnclosure.getHeight();
space.add(labelHeight + tickLabelBandsDimension, edge);
}
else if (RectangleEdge.isLeftOrRight(edge)) {
labelWidth = labelEnclosure.getWidth();
space.add(labelWidth + tickLabelBandsDimension, edge);
}
// add space for the outer tick labels, if any...
double tickMarkSpace = 0.0;
if (isTickMarksVisible()) {
tickMarkSpace = getTickMarkOutsideLength();
}
if (this.minorTickMarksVisible) {
tickMarkSpace = Math.max(tickMarkSpace,
this.minorTickMarkOutsideLength);
}
space.add(tickMarkSpace, edge);
return space;
}
/**
* Draws the axis on a Java 2D graphics device (such as the screen or a
* printer).
*
* @param g2 the graphics device (<code>null not permitted).
* @param cursor the cursor location (determines where to draw the axis).
* @param plotArea the area within which the axes and plot should be drawn.
* @param dataArea the area within which the data should be drawn.
* @param edge the axis location (<code>null not permitted).
* @param plotState collects information about the plot
* (<code>null permitted).
*
* @return The axis state (never <code>null).
*/
public AxisState draw(Graphics2D g2, double cursor, Rectangle2D plotArea,
Rectangle2D dataArea, RectangleEdge edge,
PlotRenderingInfo plotState) {
AxisState axisState = new AxisState(cursor);
if (isAxisLineVisible()) {
drawAxisLine(g2, cursor, dataArea, edge);
}
if (isTickMarksVisible()) {
drawTickMarks(g2, axisState, dataArea, edge);
}
if (isTickLabelsVisible()) {
for (int band = 0; band < this.labelInfo.length; band++) {
axisState = drawTickLabels(band, g2, axisState, dataArea, edge);
}
}
// draw the axis label (note that 'state' is passed in *and*
// returned)...
axisState = drawLabel(getLabel(), g2, plotArea, dataArea, edge,
axisState);
return axisState;
}
/**
* Draws the tick marks for the axis.
*
* @param g2 the graphics device.
* @param state the axis state.
* @param dataArea the data area.
* @param edge the edge.
*/
protected void drawTickMarks(Graphics2D g2, AxisState state,
Rectangle2D dataArea,
RectangleEdge edge) {
if (RectangleEdge.isTopOrBottom(edge)) {
drawTickMarksHorizontal(g2, state, dataArea, edge);
}
else if (RectangleEdge.isLeftOrRight(edge)) {
drawTickMarksVertical(g2, state, dataArea, edge);
}
}
/**
* Draws the major and minor tick marks for an axis that lies at the top or
* bottom of the plot.
*
* @param g2 the graphics device.
* @param state the axis state.
* @param dataArea the data area.
* @param edge the edge.
*/
protected void drawTickMarksHorizontal(Graphics2D g2, AxisState state,
Rectangle2D dataArea,
RectangleEdge edge) {
List ticks = new ArrayList();
double x0 = dataArea.getX();
double y0 = state.getCursor();
double insideLength = getTickMarkInsideLength();
double outsideLength = getTickMarkOutsideLength();
RegularTimePeriod t = createInstance(this.majorTickTimePeriodClass,
this.first.getStart(), getTimeZone(), this.locale);
long t0 = t.getFirstMillisecond();
Line2D inside = null;
Line2D outside = null;
long firstOnAxis = getFirst().getFirstMillisecond();
long lastOnAxis = getLast().getLastMillisecond() + 1;
while (t0 <= lastOnAxis) {
ticks.add(new NumberTick(new Double(t0), "", TextAnchor.CENTER,
TextAnchor.CENTER, 0.0));
x0 = valueToJava2D(t0, dataArea, edge);
if (edge == RectangleEdge.TOP) {
inside = new Line2D.Double(x0, y0, x0, y0 + insideLength);
outside = new Line2D.Double(x0, y0, x0, y0 - outsideLength);
}
else if (edge == RectangleEdge.BOTTOM) {
inside = new Line2D.Double(x0, y0, x0, y0 - insideLength);
outside = new Line2D.Double(x0, y0, x0, y0 + outsideLength);
}
if (t0 >= firstOnAxis) {
g2.setPaint(getTickMarkPaint());
g2.setStroke(getTickMarkStroke());
g2.draw(inside);
g2.draw(outside);
}
// draw minor tick marks
if (this.minorTickMarksVisible) {
RegularTimePeriod tminor = createInstance(
this.minorTickTimePeriodClass, new Date(t0),
getTimeZone(), this.locale);
long tt0 = tminor.getFirstMillisecond();
while (tt0 < t.getLastMillisecond()
&& tt0 < lastOnAxis) {
double xx0 = valueToJava2D(tt0, dataArea, edge);
if (edge == RectangleEdge.TOP) {
inside = new Line2D.Double(xx0, y0, xx0,
y0 + this.minorTickMarkInsideLength);
outside = new Line2D.Double(xx0, y0, xx0,
y0 - this.minorTickMarkOutsideLength);
}
else if (edge == RectangleEdge.BOTTOM) {
inside = new Line2D.Double(xx0, y0, xx0,
y0 - this.minorTickMarkInsideLength);
outside = new Line2D.Double(xx0, y0, xx0,
y0 + this.minorTickMarkOutsideLength);
}
if (tt0 >= firstOnAxis) {
g2.setPaint(this.minorTickMarkPaint);
g2.setStroke(this.minorTickMarkStroke);
g2.draw(inside);
g2.draw(outside);
}
tminor = tminor.next();
tminor.peg(this.calendar);
tt0 = tminor.getFirstMillisecond();
}
}
t = t.next();
t.peg(this.calendar);
t0 = t.getFirstMillisecond();
}
if (edge == RectangleEdge.TOP) {
state.cursorUp(Math.max(outsideLength,
this.minorTickMarkOutsideLength));
}
else if (edge == RectangleEdge.BOTTOM) {
state.cursorDown(Math.max(outsideLength,
this.minorTickMarkOutsideLength));
}
state.setTicks(ticks);
}
/**
* Draws the tick marks for a vertical axis.
*
* @param g2 the graphics device.
* @param state the axis state.
* @param dataArea the data area.
* @param edge the edge.
*/
protected void drawTickMarksVertical(Graphics2D g2, AxisState state,
Rectangle2D dataArea,
RectangleEdge edge) {
// FIXME: implement this...
}
/**
* Draws the tick labels for one "band" of time periods.
*
* @param band the band index (zero-based).
* @param g2 the graphics device.
* @param state the axis state.
* @param dataArea the data area.
* @param edge the edge where the axis is located.
*
* @return The updated axis state.
*/
protected AxisState drawTickLabels(int band, Graphics2D g2, AxisState state,
Rectangle2D dataArea,
RectangleEdge edge) {
// work out the initial gap
double delta1 = 0.0;
FontMetrics fm = g2.getFontMetrics(this.labelInfo[band].getLabelFont());
if (edge == RectangleEdge.BOTTOM) {
delta1 = this.labelInfo[band].getPadding().calculateTopOutset(
fm.getHeight());
}
else if (edge == RectangleEdge.TOP) {
delta1 = this.labelInfo[band].getPadding().calculateBottomOutset(
fm.getHeight());
}
state.moveCursor(delta1, edge);
long axisMin = this.first.getFirstMillisecond();
long axisMax = this.last.getLastMillisecond();
g2.setFont(this.labelInfo[band].getLabelFont());
g2.setPaint(this.labelInfo[band].getLabelPaint());
// work out the number of periods to skip for labelling
RegularTimePeriod p1 = this.labelInfo[band].createInstance(
new Date(axisMin), this.timeZone, this.locale);
RegularTimePeriod p2 = this.labelInfo[band].createInstance(
new Date(axisMax), this.timeZone, this.locale);
String label1 = this.labelInfo[band].getDateFormat().format(
new Date(p1.getMiddleMillisecond()));
String label2 = this.labelInfo[band].getDateFormat().format(
new Date(p2.getMiddleMillisecond()));
Rectangle2D b1 = TextUtilities.getTextBounds(label1, g2,
g2.getFontMetrics());
Rectangle2D b2 = TextUtilities.getTextBounds(label2, g2,
g2.getFontMetrics());
double w = Math.max(b1.getWidth(), b2.getWidth());
long ww = Math.round(java2DToValue(dataArea.getX() + w + 5.0,
dataArea, edge));
if (isInverted()) {
ww = axisMax - ww;
}
else {
ww = ww - axisMin;
}
long length = p1.getLastMillisecond()
- p1.getFirstMillisecond();
int periods = (int) (ww / length) + 1;
RegularTimePeriod p = this.labelInfo[band].createInstance(
new Date(axisMin), this.timeZone, this.locale);
Rectangle2D b = null;
long lastXX = 0L;
float y = (float) (state.getCursor());
TextAnchor anchor = TextAnchor.TOP_CENTER;
float yDelta = (float) b1.getHeight();
if (edge == RectangleEdge.TOP) {
anchor = TextAnchor.BOTTOM_CENTER;
yDelta = -yDelta;
}
while (p.getFirstMillisecond() <= axisMax) {
float x = (float) valueToJava2D(p.getMiddleMillisecond(), dataArea,
edge);
DateFormat df = this.labelInfo[band].getDateFormat();
String label = df.format(new Date(p.getMiddleMillisecond()));
long first = p.getFirstMillisecond();
long last = p.getLastMillisecond();
if (last > axisMax) {
// this is the last period, but it is only partially visible
// so check that the label will fit before displaying it...
Rectangle2D bb = TextUtilities.getTextBounds(label, g2,
g2.getFontMetrics());
if ((x + bb.getWidth() / 2) > dataArea.getMaxX()) {
float xstart = (float) valueToJava2D(Math.max(first,
axisMin), dataArea, edge);
if (bb.getWidth() < (dataArea.getMaxX() - xstart)) {
x = ((float) dataArea.getMaxX() + xstart) / 2.0f;
}
else {
label = null;
}
}
}
if (first < axisMin) {
// this is the first period, but it is only partially visible
// so check that the label will fit before displaying it...
Rectangle2D bb = TextUtilities.getTextBounds(label, g2,
g2.getFontMetrics());
if ((x - bb.getWidth() / 2) < dataArea.getX()) {
float xlast = (float) valueToJava2D(Math.min(last,
axisMax), dataArea, edge);
if (bb.getWidth() < (xlast - dataArea.getX())) {
x = (xlast + (float) dataArea.getX()) / 2.0f;
}
else {
label = null;
}
}
}
if (label != null) {
g2.setPaint(this.labelInfo[band].getLabelPaint());
b = TextUtilities.drawAlignedString(label, g2, x, y, anchor);
}
if (lastXX > 0L) {
if (this.labelInfo[band].getDrawDividers()) {
long nextXX = p.getFirstMillisecond();
long mid = (lastXX + nextXX) / 2;
float mid2d = (float) valueToJava2D(mid, dataArea, edge);
g2.setStroke(this.labelInfo[band].getDividerStroke());
g2.setPaint(this.labelInfo[band].getDividerPaint());
g2.draw(new Line2D.Float(mid2d, y, mid2d, y + yDelta));
}
}
lastXX = last;
for (int i = 0; i < periods; i++) {
p = p.next();
}
p.peg(this.calendar);
}
double used = 0.0;
if (b != null) {
used = b.getHeight();
// work out the trailing gap
if (edge == RectangleEdge.BOTTOM) {
used += this.labelInfo[band].getPadding().calculateBottomOutset(
fm.getHeight());
}
else if (edge == RectangleEdge.TOP) {
used += this.labelInfo[band].getPadding().calculateTopOutset(
fm.getHeight());
}
}
state.moveCursor(used, edge);
return state;
}
/**
* Calculates the positions of the ticks for the axis, storing the results
* in the tick list (ready for drawing).
*
* @param g2 the graphics device.
* @param state the axis state.
* @param dataArea the area inside the axes.
* @param edge the edge on which the axis is located.
*
* @return The list of ticks.
*/
public List refreshTicks(Graphics2D g2, AxisState state,
Rectangle2D dataArea, RectangleEdge edge) {
return Collections.EMPTY_LIST;
}
/**
* Converts a data value to a coordinate in Java2D space, assuming that the
* axis runs along one edge of the specified dataArea.
* <p>
* Note that it is possible for the coordinate to fall outside the area.
*
* @param value the data value.
* @param area the area for plotting the data.
* @param edge the edge along which the axis lies.
*
* @return The Java2D coordinate.
*/
public double valueToJava2D(double value, Rectangle2D area,
RectangleEdge edge) {
double result = Double.NaN;
double axisMin = this.first.getFirstMillisecond();
double axisMax = this.last.getLastMillisecond();
if (RectangleEdge.isTopOrBottom(edge)) {
double minX = area.getX();
double maxX = area.getMaxX();
if (isInverted()) {
result = maxX + ((value - axisMin) / (axisMax - axisMin))
* (minX - maxX);
}
else {
result = minX + ((value - axisMin) / (axisMax - axisMin))
* (maxX - minX);
}
}
else if (RectangleEdge.isLeftOrRight(edge)) {
double minY = area.getMinY();
double maxY = area.getMaxY();
if (isInverted()) {
result = minY + (((value - axisMin) / (axisMax - axisMin))
* (maxY - minY));
}
else {
result = maxY - (((value - axisMin) / (axisMax - axisMin))
* (maxY - minY));
}
}
return result;
}
/**
* Converts a coordinate in Java2D space to the corresponding data value,
* assuming that the axis runs along one edge of the specified dataArea.
*
* @param java2DValue the coordinate in Java2D space.
* @param area the area in which the data is plotted.
* @param edge the edge along which the axis lies.
*
* @return The data value.
*/
public double java2DToValue(double java2DValue, Rectangle2D area,
RectangleEdge edge) {
double result = Double.NaN;
double min = 0.0;
double max = 0.0;
double axisMin = this.first.getFirstMillisecond();
double axisMax = this.last.getLastMillisecond();
if (RectangleEdge.isTopOrBottom(edge)) {
min = area.getX();
max = area.getMaxX();
}
else if (RectangleEdge.isLeftOrRight(edge)) {
min = area.getMaxY();
max = area.getY();
}
if (isInverted()) {
result = axisMax - ((java2DValue - min) / (max - min)
* (axisMax - axisMin));
}
else {
result = axisMin + ((java2DValue - min) / (max - min)
* (axisMax - axisMin));
}
return result;
}
/**
* Rescales the axis to ensure that all data is visible.
*/
protected void autoAdjustRange() {
Plot plot = getPlot();
if (plot == null) {
return; // no plot, no data
}
if (plot instanceof ValueAxisPlot) {
ValueAxisPlot vap = (ValueAxisPlot) plot;
Range r = vap.getDataRange(this);
if (r == null) {
r = getDefaultAutoRange();
}
long upper = Math.round(r.getUpperBound());
long lower = Math.round(r.getLowerBound());
this.first = createInstance(this.autoRangeTimePeriodClass,
new Date(lower), this.timeZone, this.locale);
this.last = createInstance(this.autoRangeTimePeriodClass,
new Date(upper), this.timeZone, this.locale);
setRange(r, false, false);
}
}
/**
* Tests the axis for equality with an arbitrary object.
*
* @param obj the object (<code>null permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof PeriodAxis)) {
return false;
}
PeriodAxis that = (PeriodAxis) obj;
if (!this.first.equals(that.first)) {
return false;
}
if (!this.last.equals(that.last)) {
return false;
}
if (!this.timeZone.equals(that.timeZone)) {
return false;
}
if (!this.locale.equals(that.locale)) {
return false;
}
if (!this.autoRangeTimePeriodClass.equals(
that.autoRangeTimePeriodClass)) {
return false;
}
if (!(isMinorTickMarksVisible() == that.isMinorTickMarksVisible())) {
return false;
}
if (!this.majorTickTimePeriodClass.equals(
that.majorTickTimePeriodClass)) {
return false;
}
if (!this.minorTickTimePeriodClass.equals(
that.minorTickTimePeriodClass)) {
return false;
}
if (!this.minorTickMarkPaint.equals(that.minorTickMarkPaint)) {
return false;
}
if (!this.minorTickMarkStroke.equals(that.minorTickMarkStroke)) {
return false;
}
if (!Arrays.equals(this.labelInfo, that.labelInfo)) {
return false;
}
return super.equals(obj);
}
/**
* Returns a hash code for this object.
*
* @return A hash code.
*/
public int hashCode() {
if (getLabel() != null) {
return getLabel().hashCode();
}
else {
return 0;
}
}
/**
* Returns a clone of the axis.
*
* @return A clone.
*
* @throws CloneNotSupportedException this class is cloneable, but
* subclasses may not be.
*/
public Object clone() throws CloneNotSupportedException {
PeriodAxis clone = (PeriodAxis) super.clone();
clone.timeZone = (TimeZone) this.timeZone.clone();
clone.labelInfo = new PeriodAxisLabelInfo[this.labelInfo.length];
for (int i = 0; i < this.labelInfo.length; i++) {
clone.labelInfo[i] = this.labelInfo[i]; // copy across references
// to immutable objs
}
return clone;
}
/**
* A utility method used to create a particular subclass of the
* {@link RegularTimePeriod} class that includes the specified millisecond,
* assuming the specified time zone.
*
* @param periodClass the class.
* @param millisecond the time.
* @param zone the time zone.
* @param locale the locale.
*
* @return The time period.
*/
private RegularTimePeriod createInstance(Class periodClass,
Date millisecond, TimeZone zone, Locale locale) {
RegularTimePeriod result = null;
try {
Constructor c = periodClass.getDeclaredConstructor(new Class[] {
Date.class, TimeZone.class, Locale.class});
result = (RegularTimePeriod) c.newInstance(new Object[] {
millisecond, zone, locale});
}
catch (Exception e) {
try {
Constructor c = periodClass.getDeclaredConstructor(new Class[] {
Date.class});
result = (RegularTimePeriod) c.newInstance(new Object[] {
millisecond});
}
catch (Exception e2) {
// do nothing
}
}
return result;
}
/**
* Provides serialization support.
*
* @param stream the output stream.
*
* @throws IOException if there is an I/O error.
*/
private void writeObject(ObjectOutputStream stream) throws IOException {
stream.defaultWriteObject();
SerialUtilities.writeStroke(this.minorTickMarkStroke, stream);
SerialUtilities.writePaint(this.minorTickMarkPaint, stream);
}
/**
* Provides serialization support.
*
* @param stream the input stream.
*
* @throws IOException if there is an I/O error.
* @throws ClassNotFoundException if there is a classpath problem.
*/
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException {
stream.defaultReadObject();
this.minorTickMarkStroke = SerialUtilities.readStroke(stream);
this.minorTickMarkPaint = SerialUtilities.readPaint(stream);
}
}
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