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annotate src/name/blackcap/exifwasher/Misc.kt @ 10:9bbe6d803eba

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Fixed ShowDialog.
author David Barts <n5jrn@me.com>
date Fri, 10 Apr 2020 19:29:58 -0700
parents 0a106e9b91b4
children 39b977021ea1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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3
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1 /*
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2 * Miscellaneous utility stuff.
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3 */
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4 package name.blackcap.exifwasher
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5
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6 import java.awt.Component
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7 import java.awt.Cursor
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8 import java.awt.Dimension
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9 import java.awt.Font
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10 import java.awt.FontMetrics
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11 import java.awt.Graphics
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12 import java.awt.Toolkit
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13 import javax.swing.*
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14 import javax.swing.table.TableColumnModel
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15 import kotlin.annotation.*
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16 import kotlin.properties.ReadWriteProperty
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17 import kotlin.reflect.*
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18
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19 /**
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20 * Delegate that makes a var that can only be set once. This is commonly
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21 * needed in Swing, because some vars inevitably need to be declared at
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22 * outer levels but initialized in the Swing event dispatch thread.
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23 */
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24 class SetOnce<T: Any>: ReadWriteProperty<Any?,T> {
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25 private var setOnceValue: T? = null
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26
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27 override operator fun getValue(thisRef: Any?, property: KProperty<*>): T {
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28 if (setOnceValue == null) {
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29 throw RuntimeException("${property.name} has not been initialized")
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30 } else {
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31 return setOnceValue!!
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32 }
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33 }
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34
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35 @Synchronized
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36 override operator fun setValue(thisRef: Any?, property: KProperty<*>, value: T): Unit {
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37 if (setOnceValue != null) {
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38 throw RuntimeException("${property.name} has already been initialized")
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39 }
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40 setOnceValue = value
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41 }
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42 }
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43
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44 /**
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45 * Run something in the Swing thread, asynchronously.
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46 * @param block lambda containing code to run
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47 */
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48 fun inSwingThread(block: () -> Unit) {
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49 SwingUtilities.invokeLater(Runnable(block))
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50 }
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51
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52 /**
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53 * Run something in the Swing thread, synchronously.
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54 * @param block lambda containing code to run
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55 */
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56 fun inSynSwingThread(block: () -> Unit) {
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57 SwingUtilities.invokeAndWait(Runnable(block))
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58 }
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59
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60 /**
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61 * Make a shortcut for a menu item, using the standard combining key
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62 * (control, command, etc.) for the system we're on.
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63 * @param key KeyEvent constant describing the key
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64 */
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65 fun JMenuItem.makeShortcut(key: Int): Unit {
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66 val SC_KEY_MASK = Toolkit.getDefaultToolkit().menuShortcutKeyMask
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67 setAccelerator(KeyStroke.getKeyStroke(key, SC_KEY_MASK))
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68 }
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69
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70 /**
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71 * Given a MenuElement object, get the item whose text matches the
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72 * specified text.
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73 * @param text to match
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74 * @return first matched element, null if no match found
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75 */
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76 fun MenuElement.getItem(name: String) : JMenuItem? {
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77 subElements.forEach {
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78 val jMenuItem = it.component as? JMenuItem
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79 if (jMenuItem?.text == name) {
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80 return jMenuItem
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81 }
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82 }
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83 return null
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84 }
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85
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86 /**
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87 * Change to the standard wait cursor.
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88 */
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89 fun Component.useWaitCursor() {
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90 this.cursor = Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR)
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91 }
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92
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93 /**
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94 * Return back to the normal cursor().
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95 */
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96 fun Component.useNormalCursor() {
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97 this.cursor = Cursor.getDefaultCursor()
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98 }
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99
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100 /**
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101 * Thrown if the programmer botches something in our DSL.
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102 */
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103 class SwingWorkerException(message: String): Exception(message) { }
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104
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105 /**
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106 * A simplified SwingWorker DSL. It does not support intermediate
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107 * results. Just lets one define a background task and something
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108 * to execute when complete.
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109 *
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110 * @param T Type returned by inBackground (Java doInBackground) task.
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111 */
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112 class SwingWorkerBuilder<T>: SwingWorker<T,Unit>() {
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113 private var inBackgroundLambda: (SwingWorkerBuilder<T>.() -> T)? = null
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114 private var whenDoneLambda: (SwingWorkerBuilder<T>.() -> Unit)? = null
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115
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116 private fun <U> setOnce(prop: KMutableProperty0<(SwingWorkerBuilder<T>.() -> U)?>, value: SwingWorkerBuilder<T>.() -> U) {
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117 if (prop.get() != null) {
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118 throw SwingWorkerException(prop.name.removeSuffix("Lambda") + " already defined!")
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119 }
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120 prop.set(value)
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121 }
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122
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123 /**
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124 * Define the inBackground task.
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125 */
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126 fun inBackground(lambda: SwingWorkerBuilder<T>.() -> T): Unit {
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127 setOnce<T>(::inBackgroundLambda, lambda)
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128 }
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129
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130 /**
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131 * Define the whenDone task.
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132 */
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133 fun whenDone(lambda: SwingWorkerBuilder<T>.() -> Unit): Unit {
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134 setOnce<Unit>(::whenDoneLambda, lambda)
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135 }
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136
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137 /**
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138 * Validates we've been properly initialized.
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139 */
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140 fun validate(): Unit {
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141 if (inBackgroundLambda == null) {
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142 throw SwingWorkerException("inBackground not defined!")
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143 }
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144 }
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145
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146 /* standard overrides for SwingWorker follow */
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147
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148 override fun doInBackground(): T = inBackgroundLambda!!.invoke(this)
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149
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dc1f4359659d Got it compiling.
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150 override fun done(): Unit = whenDoneLambda?.invoke(this) ?: Unit
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151 }
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152
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153 /**
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154 * Provides for an outer swingWorker block to contain the DSL.
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155 */
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dc1f4359659d Got it compiling.
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156 fun <T> swingWorker(initializer: SwingWorkerBuilder<T>.() -> Unit): Unit {
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157 SwingWorkerBuilder<T>().run {
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158 initializer()
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159 validate()
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160 execute()
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161 }
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162 }
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163
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164 /**
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165 * Close a dialog (don't just hide it).
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166 */
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167 fun JDialog.close() {
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168 setVisible(false)
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169 dispose()
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170 }
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88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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171
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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172 /**
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173 * Set column width of a table.
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174 */
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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175 fun JTable.setColWidth(col: Int, width: Int, string: String?) {
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176 val FUZZ = 4
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177 columnModel.getColumn(col).preferredWidth = if (string.isNullOrEmpty()) {
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178 width
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179 } else {
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180 maxOf(width, graphics.fontMetrics.stringWidth(string) + FUZZ)
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181 }
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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182 }
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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183
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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184 /**
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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185 * Set overall width of a table.
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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186 */
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
David Barts <n5jrn@me.com>
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187 fun JTable.setOverallWidth() {
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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188 val tcm = columnModel
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189 val limit = tcm.columnCount - 1
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88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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190 var total = 0
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191 for (i in 0 .. limit) {
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88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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192 total += tcm.getColumn(i).preferredWidth
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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193 }
88d02fa97d78 Got WasherDialog table laying out somewhat sanely.
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194 preferredSize = Dimension(total, preferredSize.height)
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195 }