/*
* ATracePainter.java of project jchart2d. Base class for ITracePainter implementations.
* 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.ITracePoint2D;
import info.monitorenter.gui.chart.TracePoint2D;
import java.awt.Graphics;
/**
* A trace painter that adds the service of knowing the previous point that had
* to be painted.
*
*
* @author Achim Westermann
*
* @version $Revision: 1.27 $
*
*/
public abstract class ATracePainter implements
info.monitorenter.gui.chart.ITracePainter {
/** Generated serialVersionUID. **/
private static final long serialVersionUID = -1091004082187803076L;
/** Flag to remember if a paint iteration has ended. */
private boolean m_isEnded = false;
/**
* The last trace point that was sent to
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*
* It will be needed at {@link #endPaintIteration(Graphics)} as the former
* method only uses the first set of coordinates to store in the internal list
* to avoid duplicates.
*
*/
private ITracePoint2D m_previousPoint = new TracePoint2D(0, 0);
/**
* The last x coordinate that was sent to
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*
* It will be needed at {@link #endPaintIteration(Graphics)} as the former
* method only uses the first set of coordinates to store in the internal list
* to avoid duplicates.
*
*/
private int m_previousX;
/**
* The last y coordinate that was sent to
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*
* It will be needed at {@link #endPaintIteration(Graphics)} as the former
* method only uses the first set of coordinates to store in the internal list
* to avoid duplicates.
*
*/
private int m_previousY;
public int compareTo(final ATracePainter o) {
return this.toString().compareTo(o.toString());
}
/**
* @see info.monitorenter.gui.chart.ITracePainter#discontinue(java.awt.Graphics)
*/
public void discontinue(final Graphics g2d) {
this.endPaintIteration(g2d);
this.startPaintIteration(g2d);
}
/**
* @see info.monitorenter.gui.chart.ITracePainter#endPaintIteration(java.awt.Graphics)
*/
public void endPaintIteration(final Graphics g2d) {
// nop
}
/**
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (this.getClass() != obj.getClass()) {
return false;
}
final ATracePainter other = (ATracePainter) obj;
if (this.m_isEnded != other.m_isEnded) {
return false;
}
if (this.m_previousPoint == null) {
if (other.m_previousPoint != null) {
return false;
}
} else if (!this.m_previousPoint.equals(other.m_previousPoint)) {
return false;
}
if (this.m_previousX != other.m_previousX) {
return false;
}
if (this.m_previousY != other.m_previousY) {
return false;
}
return true;
}
/**
* Returns the previous trace point that had to be painted by
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*
*
* This value will be null if no previous point had to be
* painted.
*
*
* @return the previous trace point that had to be painted by
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*/
protected ITracePoint2D getPreviousPoint() {
return this.m_previousPoint;
}
/**
* Returns the previous X value that had to be painted by
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*
*
* This value will be {@link Integer#MIN_VALUE} if no previous point had to be
* painted.
*
*
* @return the previous X value that had to be painted by
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*/
public int getPreviousX() {
final int result = this.m_previousX;
if (this.m_isEnded) {
this.m_previousX = Integer.MIN_VALUE;
if (this.m_previousY == Integer.MIN_VALUE) {
this.m_isEnded = false;
}
}
return result;
}
/**
* Returns the previous Y value that had to be painted by
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*
*
* This value will be {@link Integer#MIN_VALUE} if no previous point had to be
* painted.
*
*
* @return the previous Y value that had to be painted by
* {@link #paintPoint(int, int, int, int, Graphics, ITracePoint2D)}.
*/
public int getPreviousY() {
final int result = this.m_previousY;
if (this.m_isEnded) {
this.m_previousY = Integer.MIN_VALUE;
if (this.m_previousX == Integer.MIN_VALUE) {
this.m_isEnded = false;
}
}
return result;
}
/**
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (this.m_isEnded ? 1231 : 1237);
result = prime * result
+ ((this.m_previousPoint == null) ? 0 : this.m_previousPoint.hashCode());
result = prime * result + this.m_previousX;
result = prime * result + this.m_previousY;
return result;
}
/**
* @see info.monitorenter.gui.chart.IPointPainter#paintPoint(int, int, int,
* int, java.awt.Graphics, info.monitorenter.gui.chart.ITracePoint2D)
*/
public void paintPoint(final int absoluteX, final int absoluteY, final int nextX,
final int nextY, final Graphics g, final ITracePoint2D original) {
this.m_previousX = nextX;
this.m_previousY = nextY;
this.m_previousPoint = original;
}
/**
* @see info.monitorenter.gui.chart.ITracePainter#startPaintIteration(java.awt.Graphics)
*/
public void startPaintIteration(final Graphics g2d) {
// nop
}
}
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