1 | package org.greenstone.gatherer.gui;
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2 | /**
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3 | *#########################################################################
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4 | *
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5 | * A component of the Gatherer application, part of the Greenstone digital
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6 | * library suite from the New Zealand Digital Library Project at the
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7 | * University of Waikato, New Zealand.
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8 | *
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9 | * Author: John Thompson, Greenstone Digital Library, University of Waikato
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10 | *
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11 | * Copyright (C) New Zealand Digital Library Project
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12 | *
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13 | * This program is free software; you can redistribute it and/or modify
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14 | * it under the terms of the GNU General Public License as published by
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15 | * the Free Software Foundation; either version 2 of the License, or
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16 | * (at your option) any later version.
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17 | *
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18 | * This program is distributed in the hope that it will be useful,
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19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 | * GNU General Public License for more details.
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22 | *
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23 | * You should have received a copy of the GNU General Public License
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24 | * along with this program; if not, write to the Free Software
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25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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26 | *########################################################################
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27 | */
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28 | import java.math.BigInteger;
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29 | import javax.swing.JProgressBar;
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30 | import javax.swing.SwingUtilities;
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31 | /** A progress bar that doesn't pack a sad when you feed it longs (such as the sizes of files) which get mangled into negative numbers. I know how it feels, as I often have negative progress. Also tries to be efficent when updating the JProgressBar, so only updates when the value actually changes, which become necessary when you move a large number of files with millions of bytes (where upon shifting a file of a thousand bytes would be pretty insignificant, maybe not even a percent, but would fire several progress updates).
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32 | * @author John Thompson, Greenstone Digital Library, University of Waikato
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33 | * @version 2.3c
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34 | */
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35 | final public class LongProgressBar
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36 | extends JProgressBar {
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37 | private BigInteger cur_value = null;
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38 | private BigInteger max_value = null;
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39 | private BigInteger min_value = null;
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40 | /** The previous percentage value. */
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41 | private int previous = -1;
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42 | private SafeSetIndeterminate safe_set_indeterminate = null;
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43 | private SafeSetString safe_set_string = null;
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44 | private SafeSetValue safe_set_value = null;
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45 | public LongProgressBar() {
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46 | super(0, 100);
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47 | cur_value = BigInteger.ZERO;
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48 | min_value = BigInteger.ZERO;
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49 | max_value = BigInteger.ZERO;
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50 | }
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51 |
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52 | public void addMaximum(int size) {
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53 | ///ystem.err.println("Add maximum " + size);
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54 | if(size > 0) {
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55 | max_value = max_value.add(new BigInteger((new Integer(size)).toString()));
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56 | update();
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57 | }
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58 | }
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59 |
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60 | public void addMaximum(long size) {
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61 | ///ystem.err.println("Add maximum " + size);
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62 | if(size > 0) {
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63 | max_value = max_value.add(new BigInteger((new Long(size)).toString()));
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64 | update();
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65 | }
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66 | }
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67 |
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68 | public void addValue(int size) {
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69 | ///ystem.err.println("Add value " + size);
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70 | if(size > 0) {
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71 | cur_value = cur_value.add(new BigInteger((new Integer(size)).toString()));
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72 | update();
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73 | }
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74 | }
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75 |
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76 | public void addValue(long size) {
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77 | ///ystem.err.println("Add value " + size);
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78 | if(size > 0) {
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79 | cur_value = cur_value.add(new BigInteger((new Long(size)).toString()));
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80 | update();
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81 | }
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82 | }
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83 |
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84 | public void refreshString() {
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85 | safeSetString(previous + "%");
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86 | }
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87 |
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88 | public void reset() {
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89 | cur_value = BigInteger.ZERO;
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90 | max_value = BigInteger.ZERO;
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91 | previous = -1;
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92 | update();
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93 | }
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94 |
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95 | public void setIndeterminate(boolean state) {
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96 | if(safe_set_indeterminate == null) {
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97 | safe_set_indeterminate = new SafeSetIndeterminate(state);
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98 | }
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99 | else {
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100 | safe_set_indeterminate.setState(state);
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101 | }
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102 | SwingUtilities.invokeLater(safe_set_indeterminate);
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103 | }
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104 |
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105 | public void setMaximum(int size) {
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106 | ///ystem.err.println("Add maximum " + size);
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107 | if(size > 0) {
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108 | max_value = new BigInteger((new Integer(size)).toString());
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109 | update();
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110 | }
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111 | }
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112 |
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113 | public void setMaximum(long size) {
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114 | ///ystem.err.println("Add maximum " + size);
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115 | if(size > 0) {
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116 | max_value = new BigInteger((new Long(size)).toString());
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117 | update();
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118 | }
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119 | }
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120 |
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121 | public void setString(String label) {
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122 | safeSetString(label);
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123 | }
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124 |
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125 | public void setValue(int size) {
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126 | ///ystem.err.println("Set value " + size);
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127 | cur_value = new BigInteger((new Integer(size)).toString());
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128 | update();
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129 | }
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130 |
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131 | public void setValue(long size) {
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132 | ///ystem.err.println("Set value " + size);
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133 | cur_value = new BigInteger((new Long(size)).toString());
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134 | update();
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135 | }
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136 |
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137 | /** This method is an unsafe way to set the progress bar to be indeterminate, -unless- it is called from the Event Queue. */
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138 | public void unsafeSetIndeterminate(boolean state) {
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139 | super.setIndeterminate(state);
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140 | }
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141 |
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142 | public void unsafeSetString(String label) {
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143 | super.setString(label);
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144 | }
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145 |
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146 | public void unsafeSetValue(int value) {
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147 | ///ystem.err.println("Set value: " + value);
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148 | super.setValue(value);
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149 | }
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150 |
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151 | private void update() {
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152 | int percentage = -1;
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153 | if(cur_value.equals(BigInteger.ZERO) || max_value.equals(BigInteger.ZERO)) {
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154 | percentage = 0;
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155 | }
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156 | else {
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157 | BigInteger tmp_value = cur_value.multiply(new BigInteger("100"));
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158 | BigInteger per_value = tmp_value.divide(max_value);
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159 | percentage = per_value.intValue();
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160 | if(percentage > 100) {
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161 | percentage = 100;
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162 | }
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163 | }
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164 | if(percentage != previous) {
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165 | ///ystem.err.println("Progress bar status: value = " + getValue());
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166 | previous = percentage;
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167 | safeSetValue(percentage);
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168 | safeSetString(percentage + "%");
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169 | }
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170 | }
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171 | /** Change the string displayed on the progress bar.
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172 | * @param label The name progress bar label as a <strong>String</strong>.
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173 | * Original code: Tad Frysinger (TeamB)
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174 | */
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175 | private void safeSetString(String label) {
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176 | if(safe_set_string == null) {
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177 | safe_set_string = new SafeSetString(label);
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178 | }
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179 | else {
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180 | safe_set_string.setLabel(label);
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181 | }
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182 | SwingUtilities.invokeLater(safe_set_string);
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183 | }
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184 |
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185 | /** Increase the value of the progress bar.
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186 | * @param ammount The ammount to increase as an <i>int</i>.
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187 | * Original code: Tad Frysinger (TeamB)
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188 | */
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189 | private void safeSetValue(final int ammount) {
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190 | // Update progress bar,
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191 | if(safe_set_value == null) {
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192 | safe_set_value = new SafeSetValue(ammount);
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193 | }
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194 | else {
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195 | safe_set_value.setValue(ammount);
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196 | }
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197 | SwingUtilities.invokeLater(safe_set_value);
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198 | }
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199 |
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200 | private class SafeSetIndeterminate
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201 | implements Runnable {
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202 | private boolean value;
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203 | public SafeSetIndeterminate(boolean value) {
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204 | this.value = value;
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205 | }
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206 | public void run() {
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207 | unsafeSetIndeterminate(value);
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208 | }
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209 | synchronized public void setState(boolean value) {
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210 | this.value = value;
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211 | }
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212 | }
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213 |
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214 | private class SafeSetString
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215 | implements Runnable {
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216 | private String label = null;
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217 | public SafeSetString(String label) {
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218 | this.label = label;
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219 | }
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220 | public void run() {
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221 | unsafeSetString(label);
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222 | }
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223 | synchronized public void setLabel(String label) {
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224 | this.label = label;
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225 | }
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226 | }
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227 |
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228 | private class SafeSetValue
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229 | implements Runnable {
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230 | private int value = -1;
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231 | public SafeSetValue(int value) {
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232 | this.value = value;
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233 | }
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234 | public void run() {
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235 | unsafeSetValue(value);
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236 | }
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237 | synchronized public void setValue(int value) {
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238 | this.value = value;
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239 | }
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240 | }
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241 | }
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