reports/DBReporter2/IscreamChart.java

//---PACKAGE DECLARATION---

//---IMPORTS---

import java.util.*;
import java.awt.image.*;

/**
 *
 * @author  $Author: pjm2 $
 * @version $Id: IscreamChart.java,v 1.2 2001/02/03 17:26:07 pjm2 Exp $
 */
public class IscreamChart {

//---FINAL ATTRIBUTES---

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

//---STATIC METHODS---

//---CONSTRUCTORS---

    public IscreamChart(long start, long end){
        _minX = start;
        _maxX = end;
        _minY = 0;
    }
        
//---PUBLIC METHODS---

    public BufferedImage drawChart(PlotData pd, int width, int height, int gradeX, int gradeY, double maxY){
        
        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        
        int gradeColour = IscreamColour.ISCREAM_BLUE;
        int fgColour = IscreamColour.BLACK;
        int bgColour = IscreamColour.WHITE;


        // Fill in the background.
        for (int i = 0; i < width; i++){
            for (int j = 0; j < height; j++){
                img.setRGB(i, j, bgColour);
            }
        }
        
        
        // Draw the vertical grid lines.
        for (int i = 0; i <= gradeX; i++){
            for (int j = 0; j < height; j++){
                img.setRGB((i*width-1)/gradeX, j, gradeColour);
            }
        }
        
        
        // Draw the horizontal grid lines.
        for (int j = 0; j <= gradeY; j++){
            for (int i = 0; i < width; i++){
                img.setRGB(i, (j*height-1)/gradeY, gradeColour);
            }
        }
        
        
        // Plot each point with the foreground colour.
        Iterator it = pd.iterator();
        while (it.hasNext()){
            
            PairData p = (PairData)it.next();
            
            // Scale each coordinate to fit on the graph perfectly.
            int x = (int)p.getX();
            double yDouble = p.getY();
            
            yDouble = ((p.getY() - _minY) * (double)height / (maxY - _minY));
            
            int y = (int) yDouble;
            
            // Don't forget that y starts from the top!
            y = height - y - 1;
            
            // Make sure integer casting has not placed anything out of bounds.
            if (x >= width){
                x = width - 1;
            }
            else if (x < 0){
                x = 0;
            }
            if (y >= height){
                y = height - 1;
            }
            else if (y < 0){
                y = 0;
            }
            
            // Draw a line representing this value.
            for (int y2 = y; y2 < height; y2++){
                img.setRGB(x, y2, fgColour);
            }
            
        }
        
        return img;
    }

    /**
     * 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---

    // Boundary values.
    private double _minX, _maxX, _minY, _maxY;

//---STATIC ATTRIBUTES---

}
Revision:	1.3
Committed:	Fri Mar 23 23:47:28 2001 UTC (24 years, 9 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(!)
#	User	Rev	Content
1	pjm2	1.1	//---PACKAGE DECLARATION---
2
3			//---IMPORTS---
4
5			import java.util.*;
6			import java.awt.image.*;
7
8			/**
9			*
10			* @author $Author: pjm2 $
11	pjm2	1.3	* @version $Id: IscreamChart.java,v 1.2 2001/02/03 17:26:07 pjm2 Exp $
12	pjm2	1.1	*/
13			public class IscreamChart {
14
15			//---FINAL ATTRIBUTES---
16
17			/**
18			* The current CVS revision of this class
19			*/
20	pjm2	1.3	public final String REVISION = "$Revision: 1.2 $";
21	pjm2	1.1
22			//---STATIC METHODS---
23
24			//---CONSTRUCTORS---
25
26			public IscreamChart(long start, long end){
27			_minX = start;
28			_maxX = end;
29			_minY = 0;
30			}
31
32			//---PUBLIC METHODS---
33
34			public BufferedImage drawChart(PlotData pd, int width, int height, int gradeX, int gradeY, double maxY){
35
36			BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
37
38			int gradeColour = IscreamColour.ISCREAM_BLUE;
39			int fgColour = IscreamColour.BLACK;
40			int bgColour = IscreamColour.WHITE;
41
42
43			// Fill in the background.
44			for (int i = 0; i < width; i++){
45			for (int j = 0; j < height; j++){
46			img.setRGB(i, j, bgColour);
47			}
48			}
49
50
51			// Draw the vertical grid lines.
52			for (int i = 0; i <= gradeX; i++){
53			for (int j = 0; j < height; j++){
54			img.setRGB((i*width-1)/gradeX, j, gradeColour);
55			}
56			}
57
58
59			// Draw the horizontal grid lines.
60			for (int j = 0; j <= gradeY; j++){
61			for (int i = 0; i < width; i++){
62			img.setRGB(i, (j*height-1)/gradeY, gradeColour);
63			}
64			}
65
66
67			// Plot each point with the foreground colour.
68			Iterator it = pd.iterator();
69			while (it.hasNext()){
70
71			PairData p = (PairData)it.next();
72
73			// Scale each coordinate to fit on the graph perfectly.
74			int x = (int)p.getX();
75			double yDouble = p.getY();
76
77			yDouble = ((p.getY() - _minY) * (double)height / (maxY - _minY));
78
79			int y = (int) yDouble;
80
81			// Don't forget that y starts from the top!
82			y = height - y - 1;
83
84			// Make sure integer casting has not placed anything out of bounds.
85			if (x >= width){
86			x = width - 1;
87			}
88			else if (x < 0){
89			x = 0;
90			}
91			if (y >= height){
92			y = height - 1;
93			}
94			else if (y < 0){
95			y = 0;
96			}
97
98			// Draw a line representing this value.
99			for (int y2 = y; y2 < height; y2++){
100			img.setRGB(x, y2, fgColour);
101			}
102
103			}
104
105			return img;
106			}
107
108			/**
109			* Overrides the {@link java.lang.Object#toString() Object.toString()}
110			* method to provide clean logging (every class should have this).
111			*
112			* @return the name of this class and its CVS revision
113			*/
114			public String toString() {
115			return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
116			}
117
118			//---PRIVATE METHODS---
119
120			//---ACCESSOR/MUTATOR METHODS---
121
122			//---ATTRIBUTES---
123
124			// Boundary values.
125			private double _minX, _maxX, _minY, _maxY;
126
127			//---STATIC ATTRIBUTES---
128
129			}