/*
* TracePainterFill.java of project jchart2d. A trace painter implementation
* that fills the area between trace an y=0,x=0.
* Copyright (c) 2004 - 2011 Achim Westermann, Achim.Westermann@gmx.de
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* If you modify or optimize the code in a useful way please let me know.
* Achim.Westermann@gmx.de
*/
package info.monitorenter.gui.chart.traces.painters;
import info.monitorenter.gui.chart.Chart2D;
import info.monitorenter.gui.chart.ITracePoint2D;
import java.awt.Graphics;
import java.util.LinkedList;
import java.util.List;
/**
* A trace painter that fills the area between trace to render and the x axis
* baseline with it's color.
* <p>
*
* Additionally it increases performance by summing up all points to render for
* a paint iteration (submitted by
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)} between
* {@link #startPaintIteration(Graphics)} and
* {@link #endPaintIteration(Graphics)}) and only invoking only one polygon
* paint for a paint call of the corresponding
* {@link info.monitorenter.gui.chart.Chart2D}.
* <p>
*
*
*
* @author <a href="mailto:Achim.Westermann@gmx.de">Achim Westermann </a>
*
* @version $Revision: 1.21 $
*
*/
public class TracePainterFill extends ATracePainter {
/** Generated <code>serialVersionUID</code>. */
private static final long serialVersionUID = -7194158082574997539L;
/**
* Stores the corresponding chart to know the coordinate roots for closing the
* polygon to fill.
*/
private final Chart2D m_chart;
/** The list of x coordinates collected in one paint iteration. */
private List<Integer> m_xPoints;
/** The list of y coordinates collected in one paint iteration. */
private List<Integer> m_yPoints;
/**
* Constructor with the corresponding chart.
* <p>
*
* @param chart
* needed to get the start pixel coordinates of traces.
*/
public TracePainterFill(final Chart2D chart) {
this.m_chart = chart;
}
/**
* @see info.monitorenter.gui.chart.ITracePainter#discontinue(java.awt.Graphics)
*/
@Override
public void discontinue(final Graphics g2d) {
this.endPaintIteration(g2d);
this.startPaintIteration(g2d);
}
/**
* @see info.monitorenter.gui.chart.ITracePainter#endPaintIteration(java.awt.Graphics)
*/
@Override
public void endPaintIteration(final Graphics g2d) {
if (g2d != null) {
final int[] x = new int[this.m_xPoints.size() + 4];
x[0] = this.m_chart.getXChartStart();
int count = 1;
for (final Integer xpoint : this.m_xPoints) {
x[count] = xpoint.intValue();
count++;
}
x[count] = this.getPreviousX();
// step down (or up) to the y=0 for the last value (in y)
x[count + 1] = x[count];
// step back to startx,starty (root)
x[count + 2] = this.m_chart.getXChartStart();
final int[] y = new int[this.m_yPoints.size() + 4];
y[0] = this.m_chart.getYChartStart();
count = 1;
for (final Integer ypoint : this.m_yPoints) {
y[count] = ypoint.intValue();
count++;
}
y[count] = this.getPreviousY();
// step down (or up) to the y=0 for the last value (in y)
y[count + 1] = this.m_chart.getYChartStart();
// step back to startx,starty (root)
y[count + 2] = this.m_chart.getYChartStart();
g2d.fillPolygon(x, y, x.length);
}
}
/**
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (!super.equals(obj)) {
return false;
}
if (this.getClass() != obj.getClass()) {
return false;
}
final TracePainterFill other = (TracePainterFill) obj;
if (this.m_chart == null) {
if (other.m_chart != null) {
return false;
}
} else if (!this.m_chart.equals(other.m_chart)) {
return false;
}
if (this.m_xPoints == null) {
if (other.m_xPoints != null) {
return false;
}
} else if (!this.m_xPoints.equals(other.m_xPoints)) {
return false;
}
if (this.m_yPoints == null) {
if (other.m_yPoints != null) {
return false;
}
} else if (!this.m_yPoints.equals(other.m_yPoints)) {
return false;
}
return true;
}
/**
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = super.hashCode();
result = prime * result + ((this.m_chart == null) ? 0 : this.m_chart.hashCode());
result = prime * result + ((this.m_xPoints == null) ? 0 : this.m_xPoints.hashCode());
result = prime * result + ((this.m_yPoints == null) ? 0 : this.m_yPoints.hashCode());
return result;
}
/**
* @see info.monitorenter.gui.chart.traces.painters.ATracePainter#paintPoint(int,
* int, int, int, java.awt.Graphics,
* info.monitorenter.gui.chart.ITracePoint2D)
*/
@Override
public void paintPoint(final int absoluteX, final int absoluteY, final int nextX,
final int nextY, final Graphics g, final ITracePoint2D original) {
this.m_xPoints.add(Integer.valueOf(absoluteX));
this.m_yPoints.add(Integer.valueOf(absoluteY));
super.paintPoint(absoluteX, absoluteY, nextX, nextY, g, original);
}
/**
* @see info.monitorenter.gui.chart.ITracePainter#startPaintIteration(java.awt.Graphics)
*/
@Override
public void startPaintIteration(final Graphics g2d) {
this.m_xPoints = new LinkedList<Integer>();
this.m_yPoints = new LinkedList<Integer>();
}
}