reports/DBReporter2/PlotData.java

//---PACKAGE DECLARATION---

//---IMPORTS---

import java.util.*;

/**
 * Class for storing and drawing 2-dimensional plot data.
 * This class is used to provide an object to store 2-dimensional plot
 * data.  Pairs of values may be added to this object and the maximum
 * and minimum values for each axis are also known internally.  This
 * information is used to produce a scaled graph, making the most of
 * the available viewing area.
 *
 * @author  $Author: pjm2 $
 * @version $Id: PlotData.java,v 1.2 2001/02/03 17:26:07 pjm2 Exp $
 */
public class PlotData {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.2 $";

//---STATIC METHODS---

//---CONSTRUCTORS---

    public PlotData(long minX, long maxX) {
        _minX = (double)minX;
        _maxX = (double)maxX;
    }

        
//---PUBLIC METHODS---

    public double getMaxY() {
        return _maxY;
    }

    public Iterator iterator() {
        return _data.iterator();
    }

    public long countPoints() {
        return _data.size();
    }

    public void addPoint(long x, long y) {
        addPoint((double)x, (double)y);
    }
    
    public void addPoint(long x, double y) {
        addPoint((double)x, y);
    }
    
    // Add a point to the plot data.
    public void addPoint(double x, double y){
        
        int newX = (int)((x - _minX) / (_maxX - _minX) * (double)SHTMLLayout.CHART_WIDTH);
        if (newX == _lastX) {
            _cumulativeValue += y;
            _cumulativeCount++;
            _lastX = newX;
            return;
        }
        else {
            if (_cumulativeCount == 0) {
                _cumulativeValue = y;
                _cumulativeCount = 1;
                _lastX = newX;
                return;
            }
        }
        
        double yTemp = y;
        y = _cumulativeValue / _cumulativeCount;
        _cumulativeCount = 1;
        _cumulativeValue = yTemp;
        
        // Add a new point to the LinkedList.
        PairData p = new PairData(_lastDoubleX, y);
        _data.add(p);

        if (_data.size() == 1) {
            _maxY = y;
        }
        
        if (y > _maxY) {
            _maxY = y;
        }
        
        _lastDoubleX = x;
        _lastX = newX;
    }
    
    // Add the last point.
    public void flushPoints() {
        if (_cumulativeCount > 0) {
            addPoint(2* _maxX, 0);
        }
    }
    
    
    // Move each point so that it fits in the view perfectly.
    public void scaleToFitX(int width, int height){
        Iterator it = _data.iterator();
        while (it.hasNext()){
            PairData p = (PairData)it.next();
            double x = p.getX();
            double y = p.getY();
            x = (x - _minX) / (_maxX - _minX) * (double)width;
            p.setPair(x, y);
        }
    }
    
    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
    }

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

    private LinkedList _data = new LinkedList();
    private double _maxY;
    private double _minY = 0;
    private double _minX;
    private double _maxX;
    
    private int _lastX = -1;
    private int _cumulativeCount = 0;
    private double _cumulativeValue = 0;
    private double _lastDoubleX = 0;

//---STATIC ATTRIBUTES---

}
Revision:	1.3
Committed:	Fri Mar 23 23:47:28 2001 UTC (23 years, 2 months ago) by pjm2
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.2:	+2 -2 lines
State:	*FILE REMOVED*
Log Message:	I thought I'd deleted these weeks ago(!)
#	Content
1	//---PACKAGE DECLARATION---
2
3	//---IMPORTS---
4
5	import java.util.*;
6
7	/**
8	* Class for storing and drawing 2-dimensional plot data.
9	* This class is used to provide an object to store 2-dimensional plot
10	* data. Pairs of values may be added to this object and the maximum
11	* and minimum values for each axis are also known internally. This
12	* information is used to produce a scaled graph, making the most of
13	* the available viewing area.
14	*
15	* @author $Author: pjm2 $
16	* @version $Id: PlotData.java,v 1.2 2001/02/03 17:26:07 pjm2 Exp $
17	*/
18	public class PlotData {
19
20	//---FINAL ATTRIBUTES---
21
22	/**
23	* The current CVS revision of this class
24	*/
25	public final String REVISION = "$Revision: 1.2 $";
26
27	//---STATIC METHODS---
28
29	//---CONSTRUCTORS---
30
31	public PlotData(long minX, long maxX) {
32	_minX = (double)minX;
33	_maxX = (double)maxX;
34	}
35
36
37	//---PUBLIC METHODS---
38
39	public double getMaxY() {
40	return _maxY;
41	}
42
43	public Iterator iterator() {
44	return _data.iterator();
45	}
46
47	public long countPoints() {
48	return _data.size();
49	}
50
51	public void addPoint(long x, long y) {
52	addPoint((double)x, (double)y);
53	}
54
55	public void addPoint(long x, double y) {
56	addPoint((double)x, y);
57	}
58
59	// Add a point to the plot data.
60	public void addPoint(double x, double y){
61
62	int newX = (int)((x - _minX) / (_maxX - _minX) * (double)SHTMLLayout.CHART_WIDTH);
63	if (newX == _lastX) {
64	_cumulativeValue += y;
65	_cumulativeCount++;
66	_lastX = newX;
67	return;
68	}
69	else {
70	if (_cumulativeCount == 0) {
71	_cumulativeValue = y;
72	_cumulativeCount = 1;
73	_lastX = newX;
74	return;
75	}
76	}
77
78	double yTemp = y;
79	y = _cumulativeValue / _cumulativeCount;
80	_cumulativeCount = 1;
81	_cumulativeValue = yTemp;
82
83	// Add a new point to the LinkedList.
84	PairData p = new PairData(_lastDoubleX, y);
85	_data.add(p);
86
87	if (_data.size() == 1) {
88	_maxY = y;
89	}
90
91	if (y > _maxY) {
92	_maxY = y;
93	}
94
95	_lastDoubleX = x;
96	_lastX = newX;
97	}
98
99	// Add the last point.
100	public void flushPoints() {
101	if (_cumulativeCount > 0) {
102	addPoint(2* _maxX, 0);
103	}
104	}
105
106
107	// Move each point so that it fits in the view perfectly.
108	public void scaleToFitX(int width, int height){
109	Iterator it = _data.iterator();
110	while (it.hasNext()){
111	PairData p = (PairData)it.next();
112	double x = p.getX();
113	double y = p.getY();
114	x = (x - _minX) / (_maxX - _minX) * (double)width;
115	p.setPair(x, y);
116	}
117	}
118
119	/**
120	* Overrides the {@link java.lang.Object#toString() Object.toString()}
121	* method to provide clean logging (every class should have this).
122	*
123	* @return the name of this class and its CVS revision
124	*/
125	public String toString() {
126	return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
127	}
128
129	//---PRIVATE METHODS---
130
131	//---ACCESSOR/MUTATOR METHODS---
132
133	//---ATTRIBUTES---
134
135	private LinkedList _data = new LinkedList();
136	private double _maxY;
137	private double _minY = 0;
138	private double _minX;
139	private double _maxX;
140
141	private int _lastX = -1;
142	private int _cumulativeCount = 0;
143	private double _cumulativeValue = 0;
144	private double _lastDoubleX = 0;
145
146	//---STATIC ATTRIBUTES---
147
148	}