|
1
23
24 package de.progra.charting.render;
25
26 import java.awt.Color  ;
27 import java.awt.Font ;
28 import java.awt.Graphics2D ;
29 import java.awt.geom.AffineTransform ;
30 import java.awt.geom.Point2D ;
31 import java.awt.geom.Rectangle2D ;
32 import java.awt.font.LineMetrics ;
33 import java.awt.font.FontRenderContext ;
34 import java.text.DecimalFormat ;
35 import de.progra.charting.PointToPixelTranslator;
36 import de.progra.charting.CoordSystem;
37 import de.progra.charting.model.AbstractChartDataModel;
38 import de.progra.charting.model.ChartDataModel;
39 import de.progra.charting.model.ChartDataModelConstraints;
40 import de.progra.charting.model.StackedChartDataModelConstraints;
41
42
49 public class StackedBarChartRenderer extends AbstractChartRenderer {
50
51 protected float boxWidth = 1.0f;
52
53
57 public StackedBarChartRenderer(CoordSystem cs, AbstractChartDataModel model) {
58 super(cs, model);
59 }
60
61
68 public StackedBarChartRenderer(CoordSystem cs, AbstractChartDataModel model,
69 float boxWidth) {
70 this(cs, model);
71 this.boxWidth = boxWidth;
72 }
73
74
75
78 public void renderChart(Graphics2D g) {
79 ChartDataModel m = getChartDataModel();
80 ChartDataModelConstraints con = m.getChartDataModelConstraints(CoordSystem.FIRST_YAXIS);
81
82 System.out.println("** Maximum: "+con.getMaximumValue()+" Minimum: "+con.getMinimumValue());
83
84 if(m.isColumnNumeric())
85 return;
86
87 RowColorModel rcm = getRowColorModel();
88 AffineTransform yaxis1 = getTransform(CoordSystem.FIRST_YAXIS);
89
90 int datasetcount = m.getDataSetNumber();
91
92 int maximumDataSetLength = Integer.MIN_VALUE;
93
94 for(int i = 0; i < model.getDataSetNumber(); i++) {
95 maximumDataSetLength = Math.max(maximumDataSetLength, model.getDataSetLength(i));
96 }
97
98 Point2D pointzero;
99 if(con.getMinimumValue().floatValue() > 0)
100 pointzero = yaxis1.transform(new Point2D.Float ((float)con.getMinimumColumnValue(),
101 con.getMinimumValue().floatValue()),
102 null);
103 else if(con.getMaximumValue().floatValue() < 0)
104 pointzero = yaxis1.transform(new Point2D.Float ((float)con.getMinimumColumnValue(),
105 con.getMaximumValue().floatValue()),
106 null);
107 else
108 pointzero = yaxis1.transform(new Point2D.Float ((float)con.getMinimumColumnValue(),
109 0f),
110 null);
111
112 Point2D point1 = yaxis1.transform(new Point2D.Float ((float)con.getMinimumColumnValue(),
113 con.getMaximumValue().floatValue()),
114 null);
115 Point2D point2 = yaxis1.transform(new Point2D.Float ((float)con.getMaximumColumnValue(),
116 con.getMaximumValue().floatValue()),
117 null);
118 Point2D value = point1;
119
120 int dataunitwidth = (int)((point2.getX() - point1.getX()) / con.getMaximumColumnValue());
121 int boxwidth = (int)(dataunitwidth * boxWidth);
122 float margin = (float)(dataunitwidth * ((1.0 - boxWidth)/2f));
123
124
132 double currentvalue = 0.0;
133 Rectangle2D box = null;
134 Point2D oldmaxvalue;
135 Point2D oldminvalue;
136
137 for(int j = 0; j < maximumDataSetLength; j++) {
138 double minvalue = 0.0;
139 double maxvalue = 0.0;
140
141 oldmaxvalue = pointzero;
142 oldminvalue = pointzero;
143
144 for(int i = 0; i < m.getDataSetNumber(); i++) {
145
146 if(j < m.getDataSetLength(i))
147 currentvalue = m.getValueAt(i, j).doubleValue();
148 else
149 currentvalue = 0.0;
150
151 if(currentvalue < 0.0) {
152 minvalue += currentvalue;
153 yaxis1.transform(new Point2D.Float ((float)j, (float)minvalue),
154 value);
155
156 box =
157 new Rectangle2D.Float ((float)(value.getX()),
158 (float)Math.min(value.getY(), oldminvalue.getY()),
159 (float)boxwidth,
160 (float)Math.abs(oldminvalue.getY() - value.getY()));
161 oldminvalue = (Point2D )value.clone();
162 }
163 else {
164 maxvalue += currentvalue;
165 yaxis1.transform(new Point2D.Float ((float)j, (float)maxvalue),
166 value);
167
168 box =
169 new Rectangle2D.Float ((float)(value.getX()),
170 (float)Math.min(value.getY(), oldmaxvalue.getY()),
171 (float)boxwidth,
172 (float)Math.abs(oldmaxvalue.getY() - value.getY()));
173
174 oldmaxvalue = (Point2D )value.clone();
175 }
176
177 g.setColor(rcm.getColor(i));
178 g.fill(box);
179 g.setColor(Color.black);
180 g.draw(box);
181 }
182 }
183 }
185 }
186
187 |
Popular Tags |
Java API By Example, From Geeks To Geeks.