Mercurial > hg > blitz_condensed

annotate src/org/dancres/blitz/tools/dash/PieChart.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
parents
children 48228766ed4c
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0
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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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;
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8 import javax.swing.JPanel;
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9
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10 public class PieChart extends JPanel {
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11 String title;
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12 Font font;
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13 FontMetrics fontMetrics;
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14 int titleHeight = 15;
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15 int columns;
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16 int values[];
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17 Color colors[];
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18 String labels[];
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19 float percent[];
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20 float angle[];
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21 int maxLabelWidth = 0;
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22 int maxValueWidth = 0;
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23 int max = 0;
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24 int strWidth = 0;
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25 boolean showLabel = true;
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26 boolean showPercent = true;
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27 int lx = 0, ly = 0;
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28 int cx = 0, cy = 0;
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29 public PieChart() {
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30 font = new java.awt.Font("Sanserif", Font.BOLD, 12);
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31 fontMetrics = getFontMetrics(font);
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32 setBackground(Color.white);
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33 title = "JavaSpace ops";
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34 columns = 3;
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35 showLabel = true;
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36 showPercent = true;
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37 values = new int[]{0, 0, 0};
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38 colors = new Color[]{ColorScheme.TAKE,ColorScheme.WRITE,
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39 ColorScheme.READ};
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40 labels = new String[]{"Take", "Write", "Read"};
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41 percent = new float[columns];
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42 angle = new float[columns];
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43 calcValues();
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44 }
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45 private void calcValues() {
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46 float totalValue = 0;
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47 for (int i = 0; i < columns; i++) {
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48 totalValue += values[i];
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49 if (values[i] > max) {
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50 max = values[i];
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51 }
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52 maxLabelWidth = Math.max(fontMetrics
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53 .stringWidth((String) (labels[i])),
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54 maxLabelWidth);
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55 }
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56 float multiFactor = 100 / totalValue;
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57 for (int i = 0; i < columns; i++) {
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58 percent[i] = values[i] * multiFactor;
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59 angle[i] = (float) (percent[i] * 3.6);
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60 }
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61 }
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62 void update(int take, int write, int read) {
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63 values = new int[]{take, write, read};
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64 calcValues();
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65 repaint();
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66 }
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67 public synchronized void paint(Graphics g) {
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68 Dimension dim = getSize();
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69 g.setColor(Color.white);
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70 g.fillRect(0, 0, dim.width, dim.height);
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71 int x = 0;
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72 int y = 0;
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73 int width = 0, height = 0;
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74 int ax = 0, ay = 0;
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75 int px = 0, py = 0;
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76 int radius = 0;
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77 width = height = Math.min((getSize().width - 100),
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78 (getSize().height - 100));
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79 x = y = 50;
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80 if (getSize().width > width) {
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81 x = (getSize().width - width) / 2;
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82 }
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83 cx = x + width / 2;
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84 cy = y + height / 2;
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85 radius = width / 2;
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86 strWidth = fontMetrics.stringWidth(title);
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87 Font fnt = new java.awt.Font("Sanserif", Font.BOLD, 16);
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88 g.setFont(fnt);
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89 g.setColor(Color.red);
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90 g.setFont(font);
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91 int initAngle = 90;
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92 int sweepAngle = 0;
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93 int incSweepAngle = 0;
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94 int incLabelAngle = (int) (angle[0] / 2);
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95 for (int i = 0; i < columns; i++) {
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96 sweepAngle = (int) Math.round(angle[i]);
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97 g.setColor((Color) colors[i]);
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98 if (i == (columns - 1)) {
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99 sweepAngle = 360 - incSweepAngle;
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100 g.fillArc(x, y, width, height, initAngle, (-sweepAngle));
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101 g.setColor(Color.black);
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102 g.drawArc(x, y, width, height, initAngle, (-sweepAngle));
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103 if (showLabel) {
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104 lx = (int) (cx + (radius * Math
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105 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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106 ly = (int) (cy + (radius * Math
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107 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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108 adjustLabel(i);
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109 g.drawString((String) labels[i], lx, ly);
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110 }
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111 if (showPercent) {
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112 px = (int) (cx + ((radius * 2 / 3) * Math
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113 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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114 py = (int) (cy + ((radius * 2 / 3) * Math
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115 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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116 g.drawString(String.valueOf(Math.round(percent[i])) + "%",
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117 px, py);
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118 }
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119 break;
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120 }
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121 g.fillArc(x, y, width, height, initAngle, (-sweepAngle));
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122 g.setColor(Color.black);
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123 g.drawArc(x, y, width, height, initAngle, (-sweepAngle));
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124 incSweepAngle += sweepAngle;
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125 ax = (int) (cx + (radius * Math
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126 .cos((incSweepAngle * 3.14f / 180) - 3.14f / 2)));
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127 ay = (int) (cy + (radius * Math
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128 .sin((incSweepAngle * 3.14f / 180) - 3.14f / 2)));
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129 g.drawLine(cx, cy, ax, ay);
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130 if (showLabel) {
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131 lx = (int) (cx + (radius * Math
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132 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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133 ly = (int) (cy + (radius * Math
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134 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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135 adjustLabel(i);
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136 g.drawString((String) labels[i], lx, ly);
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137 }
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138 if (showPercent) {
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139 px = (int) (cx + ((radius * 2 / 3) * Math
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140 .cos((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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141 py = (int) (cy + ((radius * 2 / 3) * Math
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142 .sin((incLabelAngle * 3.14f / 180) - 3.14f / 2)));
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143 strWidth = fontMetrics
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144 .stringWidth(Math.round(percent[i]) + "%");
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145 g.drawString(String.valueOf(Math.round(percent[i])) + "%",
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146 (px - strWidth / 2), py);
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147 }
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148 incLabelAngle = incLabelAngle
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149 + (int) (angle[i] / 2 + angle[i + 1] / 2);
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150 initAngle += (-sweepAngle);
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151 }
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152 g.setColor(Color.black);
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153 g.drawLine(cx, cy, cx, cy - radius);
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154 }
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155 private void adjustLabel(int i) {
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156 if ((lx > cx) && (ly < cy)) {
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157 lx += 5;
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158 ly -= 5;
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159 }
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160 if ((lx > cx) && (ly > cy)) {
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161 lx += 5;
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162 ly += 10;
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163 }
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164 if ((lx < cx) && (ly > cy)) {
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165 strWidth = fontMetrics.stringWidth(labels[i]);
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166 lx -= strWidth + 5;
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167 if (lx < 0)
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168 lx = 0;
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169 }
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170 if ((lx < cx) && (ly < cy)) {
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171 strWidth = fontMetrics.stringWidth(labels[i]);
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172 lx -= strWidth + 5;
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173 if (lx < 0)
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174 lx = 0;
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175 }
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176 }
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177 }