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/Users/lyon/j4p/src/bookExamples/ch27BusinessGraphics/charts/Ticks.java
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1 package bookExamples.ch27BusinessGraphics.charts;
2
3 import java.awt.*;
4
5 public class Ticks extends Canvas
6 implements Paintable {
7 private DoubleDataBean dd;
8 private int xtickNumber = 1;
9 private int ytickNumber = 1;
10
11 public Ticks(DoubleDataBean _dd, Dimension d) {
12 dd = _dd;
13 setSize(d);
14 }
15
16 public void setNumberOfTicks(int _xtickNumber,
17 int _ytickNumber) {
18 xtickNumber = _xtickNumber;
19 ytickNumber = _ytickNumber;
20 }
21
22 /**
23 * Draws the grid in the background of the line graphics.graph,
24 if
25 * it has been set to do so in the constructor
26 (defaults to
27 * true). Grid runs length and width of each axis, at
28 the
29 * increment value set in DoubleDataBean.getXIncrement()
30 and
31 * DoubleDataBean.getYIncrement().
32 *
33 * @param g Graphics context for drawing
34 * @see LineGraph.#paint
35 * @see DoubleDataBean.#getNumTicks
36 * @see DoubleDataBean.#getXIncrement
37 * @see DoubleDataBean.#getYIncrement
38 * @see DoubleDataBean.#DeltaY
39 * @see java.awt.Graphics.#drawLine
40 */
41 protected void drawGrid(Graphics g) {
42 if (!dd.isGridOn()) return;
43 Dimension d = getSize();
44 int width = d.width;
45 int height = d.height;
46 int numXTicks = dd.getNumTicks
47 (dd.getXVals(), width);
48 int numYTicks = dd.getNumTicks(dd.getYVals(), height);
49 double xIncrement = dd.getXIncrement();
50 double deltaY = dd.getDeltaY();
51 int yIncrement =
52 (int) Math.round(dd.getYIncrement());
53 g.setColor(Color.darkGray);
54
55 //new code starts here
56 double xCoord = dd.getXAxisCoord();
57 double yCoord = dd.getYAxisCoord();
58 // end new code
59
60 //grid along X axis (horizontal lines)
61 int yHeightPos = (int) (yCoord + yIncrement);
62 int yHeightNeg = (int) (yCoord - yIncrement);
63
64 int yLeft = 0;
65 int yRight = width;
66
67 while (yHeightPos > 0) {
68 yHeightPos = yHeightPos - (yIncrement);
69 g.drawLine(yLeft, yHeightPos, yRight, yHeightPos);
70 }
71
72 while (yHeightNeg < height) {
73 yHeightNeg = yHeightNeg + yIncrement;
74 g.drawLine(yLeft, yHeightNeg, yRight, yHeightNeg);
75 }
76
77
78 int xTop = 0;
79 int xBottom = height;
80 int xWidthPos = (int) (xCoord + xIncrement);
81 int xWidthNeg = (int) (xCoord - xIncrement);
82
83 while (xWidthPos > 0) {
84 xWidthPos = xWidthPos - (int) xIncrement;
85 g.drawLine(xWidthPos, xTop, xWidthPos, xBottom);
86 }
87
88 while (xWidthNeg < width) {
89 xWidthNeg = xWidthNeg + (int) xIncrement;
90 g.drawLine(xWidthNeg, xTop, xWidthNeg, xBottom);
91 }
92
93
94 }
95
96 /**
97 * Draws the axes for the line graphics.graph and bar graphics.graph
98 along the
99 * calculated X and Y origins.
100 *
101 * @param g Graphics context for drawing
102 * @see LineGraph.#paint
103 * @see BarGraph.#paint
104 * @see DoubleDataBean.#getXAxisCoord
105 * @see DoubleDataBean.#getYAxisCoord
106 * @see java.awt.Graphics.#drawLine
107 */
108 protected void drawAxes(Graphics g) {
109 g.setColor(Color.blue);
110 int xorig = (int) dd.getXAxisCoord();
111 int yorig = (int) dd.getYAxisCoord();
112
113 g.drawLine(0, yorig, getSize().width, yorig);
114 g.drawLine(xorig, 0, xorig, getSize().height);
115
116 }
117
118 /**
119 * Draws the ticks along the axes for the line graphics.graph,
120 if
121 * it has been set to do so in the constructor
122 (defaults to
123 * true). Ticks are hard coded to be two pixels on
124 either side
125 * of each axis.
126 *
127 * @param g Graphics context for drawing
128 * @see LineGraph.#paint
129 * @see DoubleDataBean.#getNumTicks
130 * @see DoubleDataBean.#getXIncrement
131 * @see DoubleDataBean.#getYIncrement
132 * @see DoubleDataBean.#DeltaY
133 * @see DoubleDataBean.#getXAxisCoord
134 * @see DoubleDataBean.#getYAxisCoord
135 * @see java.awt.Graphics.#drawLine
136 */
137 public void paint(Graphics g) {
138 Dimension d = getSize();
139 drawAxes(g);
140 //drawGrid(g);
141 int width = d.width;
142 int height = d.height;
143 double xIncrement = width / xtickNumber;
144 double deltaY = dd.getDeltaY();
145 double yIncrement = height / ytickNumber;
146
147 //Horizontal lines (along Y Axis)
148 int xCoord = (int) dd.getXAxisCoord();
149 int yCoord = (int) dd.getYAxisCoord();
150 int yLeft = xCoord - 2;
151 int yRight = xCoord + 2;
152 int xTop = yCoord + 2;
153 int xBottom = yCoord - 2;
154 int yHeightPos = (int) (yCoord + yIncrement);
155 int yHeightNeg = (int) (yCoord - yIncrement);
156 int xWidthPos = (int) (xCoord + xIncrement);
157 int xWidthNeg = (int) (xCoord - xIncrement);
158
159 while (yHeightPos > 0) {
160 yHeightPos = yHeightPos - ((int) yIncrement);
161 g.drawLine(yLeft, yHeightPos, yRight, yHeightPos);
162
163 }
164
165 while (yHeightNeg < height) {
166 yHeightNeg = yHeightNeg + (int) yIncrement;
167 g.drawLine(yLeft, yHeightNeg, yRight, yHeightNeg);
168 }
169
170 while (xWidthPos > 0) {
171 xWidthPos = xWidthPos - (int) xIncrement;
172 g.drawLine(xWidthPos, xTop, xWidthPos, xBottom);
173 }
174
175 while (xWidthNeg < width) {
176 xWidthNeg = xWidthNeg + (int) xIncrement;
177 g.drawLine(xWidthNeg, xTop, xWidthNeg, xBottom);
178 }
179
180
181 }
182 }
183