Mercurial > hg > blitz_condensed

annotate src/org/dancres/blitz/tools/dash/PieChart.java @ 6:48228766ed4c

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when expecting floating point math, do floating point math
author dbrosius@mebigfatguy.com
date Thu, 14 May 2009 12:15:48 -0400
parents 3dc0c5604566
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 package org.dancres.blitz.tools.dash;
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2
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3 import java.awt.Color;
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4 import java.awt.Dimension;
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5 import java.awt.Font;
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6 import java.awt.FontMetrics;
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7 import java.awt.Graphics;
6
48228766ed4c when expecting floating point math, do floating point math
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8
0
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9 import javax.swing.JPanel;
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10
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11 public class PieChart extends JPanel {
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12 String title;
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13 Font font;
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14 FontMetrics fontMetrics;
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15 int titleHeight = 15;
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16 int columns;
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17 int values[];
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18 Color colors[];
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19 String labels[];
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20 float percent[];
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21 float angle[];
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22 int maxLabelWidth = 0;
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23 int maxValueWidth = 0;
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24 int max = 0;
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25 int strWidth = 0;
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26 boolean showLabel = true;
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27 boolean showPercent = true;
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28 int lx = 0, ly = 0;
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29 int cx = 0, cy = 0;
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30 public PieChart() {
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31 font = new java.awt.Font("Sanserif", Font.BOLD, 12);
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32 fontMetrics = getFontMetrics(font);
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33 setBackground(Color.white);
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34 title = "JavaSpace ops";
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35 columns = 3;
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36 showLabel = true;
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37 showPercent = true;
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38 values = new int[]{0, 0, 0};
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39 colors = new Color[]{ColorScheme.TAKE,ColorScheme.WRITE,
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40 ColorScheme.READ};
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41 labels = new String[]{"Take", "Write", "Read"};
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42 percent = new float[columns];
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43 angle = new float[columns];
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44 calcValues();
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45 }
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46 private void calcValues() {
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47 float totalValue = 0;
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48 for (int i = 0; i < columns; i++) {
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49 totalValue += values[i];
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50 if (values[i] > max) {
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51 max = values[i];
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52 }
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53 maxLabelWidth = Math.max(fontMetrics
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54 .stringWidth((labels[i])),
0
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55 maxLabelWidth);
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56 }
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57 float multiFactor = 100 / totalValue;
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58 for (int i = 0; i < columns; i++) {
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59 percent[i] = values[i] * multiFactor;
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60 angle[i] = (float) (percent[i] * 3.6);
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61 }
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62 }
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63 void update(int take, int write, int read) {
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64 values = new int[]{take, write, read};
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65 calcValues();
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66 repaint();
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67 }
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68 public synchronized void paint(Graphics g) {
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69 Dimension dim = getSize();
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70 g.setColor(Color.white);
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71 g.fillRect(0, 0, dim.width, dim.height);
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72 int x = 0;
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73 int y = 0;
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74 int width = 0, height = 0;
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75 int ax = 0, ay = 0;
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76 int px = 0, py = 0;
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77 int radius = 0;
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78 width = height = Math.min((getSize().width - 100),
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79 (getSize().height - 100));
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80 x = y = 50;
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81 if (getSize().width > width) {
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82 x = (getSize().width - width) / 2;
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83 }
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84 cx = x + width / 2;
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85 cy = y + height / 2;
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86 radius = width / 2;
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87 strWidth = fontMetrics.stringWidth(title);
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88 Font fnt = new java.awt.Font("Sanserif", Font.BOLD, 16);
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89 g.setFont(fnt);
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90 g.setColor(Color.red);
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91 g.setFont(font);
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92 int initAngle = 90;
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93 int sweepAngle = 0;
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94 int incSweepAngle = 0;
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95 int incLabelAngle = (int) (angle[0] / 2);
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96 for (int i = 0; i < columns; i++) {
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97 sweepAngle = Math.round(angle[i]);
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98 g.setColor(colors[i]);
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99 if (i == (columns - 1)) {
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100 sweepAngle = 360 - incSweepAngle;
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101 g.fillArc(x, y, width, height, initAngle, (-sweepAngle));
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102 g.setColor(Color.black);
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103 g.drawArc(x, y, width, height, initAngle, (-sweepAngle));
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104 if (showLabel) {
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105 lx = (int) (cx + (radius * Math
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106 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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107 ly = (int) (cy + (radius * Math
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108 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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109 adjustLabel(i);
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110 g.drawString(labels[i], lx, ly);
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111 }
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112 if (showPercent) {
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113 px = (int) (cx + ((radius * 2.0f / 3) * Math
0
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114 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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115 py = (int) (cy + ((radius * 2 / 3) * Math
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116 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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117 g.drawString(String.valueOf(Math.round(percent[i])) + "%",
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118 px, py);
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119 }
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120 break;
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121 }
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122 g.fillArc(x, y, width, height, initAngle, (-sweepAngle));
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123 g.setColor(Color.black);
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124 g.drawArc(x, y, width, height, initAngle, (-sweepAngle));
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125 incSweepAngle += sweepAngle;
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126 ax = (int) (cx + (radius * Math
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127 .cos((incSweepAngle * 3.14f / 180) - 3.14f / 2)));
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128 ay = (int) (cy + (radius * Math
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129 .sin((incSweepAngle * 3.14f / 180) - 3.14f / 2)));
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130 g.drawLine(cx, cy, ax, ay);
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131 if (showLabel) {
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132 lx = (int) (cx + (radius * Math
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133 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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134 ly = (int) (cy + (radius * Math
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135 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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136 adjustLabel(i);
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48228766ed4c when expecting floating point math, do floating point math
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137 g.drawString(labels[i], lx, ly);
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138 }
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139 if (showPercent) {
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140 px = (int) (cx + ((radius * 2 / 3) * Math
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141 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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142 py = (int) (cy + ((radius * 2 / 3) * Math
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143 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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144 strWidth = fontMetrics
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145 .stringWidth(Math.round(percent[i]) + "%");
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146 g.drawString(String.valueOf(Math.round(percent[i])) + "%",
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147 (px - strWidth / 2), py);
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148 }
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149 incLabelAngle = incLabelAngle
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150 + (int) (angle[i] / 2 + angle[i + 1] / 2);
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151 initAngle += (-sweepAngle);
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152 }
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153 g.setColor(Color.black);
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154 g.drawLine(cx, cy, cx, cy - radius);
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155 }
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156 private void adjustLabel(int i) {
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157 if ((lx > cx) && (ly < cy)) {
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158 lx += 5;
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159 ly -= 5;
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160 }
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161 if ((lx > cx) && (ly > cy)) {
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162 lx += 5;
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163 ly += 10;
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164 }
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165 if ((lx < cx) && (ly > cy)) {
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166 strWidth = fontMetrics.stringWidth(labels[i]);
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167 lx -= strWidth + 5;
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168 if (lx < 0)
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169 lx = 0;
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170 }
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171 if ((lx < cx) && (ly < cy)) {
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172 strWidth = fontMetrics.stringWidth(labels[i]);
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173 lx -= strWidth + 5;
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174 if (lx < 0)
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175 lx = 0;
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176 }
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177 }
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178 }