/*
* PointPainterVerticalBar.java, a point painter that renders a bar
* for each point.
* 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.pointpainters;
import info.monitorenter.gui.chart.Chart2D;
import info.monitorenter.gui.chart.ITracePoint2D;
import java.awt.Graphics;
/**
* Renders points by painting a bar with choosable width for each point to show.
* <p>
* Bars are placed around the x value to render: the middle of the bar in x
* dimension is the exact x value.
* <p>
*
* @author <a href="mailto:Achim.Westermann@gmx.de">Achim Westermann </a>
*
* @version $Revision: 1.18 $
*
*/
public class PointPainterVerticalBar extends APointPainter<PointPainterVerticalBar> {
/** Generated <code>serialVersionUID</code>. */
private static final long serialVersionUID = 659897369391828199L;
/**
* Stores the corresponding chart to know the coordinate roots for closing the
* rectangle to fill.
* <p>
*/
private final Chart2D m_chart;
/** Half the width of a bar. */
private int m_halfWidth;
/**
* Creates an instance with a default bar width size of 4.
* <p>
*
* @param chart
* the corresponding chart for bound information.
*/
public PointPainterVerticalBar(final Chart2D chart) {
this(4, chart);
}
/**
* Creates an instance with the bar width.
*
* @param barWidth
* the bar width in pixel to use.
*
* @param chart
* the corresponding chart for bound information.
*/
public PointPainterVerticalBar(final int barWidth, final Chart2D chart) {
this.setBarWidth(barWidth);
this.m_chart = chart;
}
/**
* @see info.monitorenter.gui.chart.pointpainters.APointPainter#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 PointPainterVerticalBar other = (PointPainterVerticalBar) 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_halfWidth != other.m_halfWidth) {
return false;
}
return true;
}
/**
* Returns the diameter of the discs to paint in pixel.
* <p>
*
* @return the diameter of the discs to paint in pixel.
*/
public int getBarWidth() {
return this.m_halfWidth;
}
/**
* @see info.monitorenter.gui.chart.pointpainters.APointPainter#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_halfWidth;
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) {
g.fillRect(absoluteX - this.m_halfWidth, absoluteY, 2 * this.m_halfWidth, this.m_chart
.getYChartStart()
- absoluteY);
}
/**
* Sets the width of the bars to paint in pixel.
* <p>
*
* @param barWidth
* the width of the bars to paint in pixel.
*/
public void setBarWidth(final int barWidth) {
this.m_halfWidth = barWidth / 2;
}
}