Mercurial > cgi-bin > hgweb.cgi > JpegWasher
annotate src/name/blackcap/exifwasher/Misc.kt @ 7:65d14d44bc3f
Works, but the column layout numbers are WEIRD.
author | David Barts <n5jrn@me.com> |
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date | Fri, 10 Apr 2020 13:44:04 -0700 |
parents | dc1f4359659d |
children | 88d02fa97d78 |
rev | line source |
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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.Toolkit |
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9 import javax.swing.* |
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10 import kotlin.annotation.* |
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11 import kotlin.properties.ReadWriteProperty |
5 | 12 import kotlin.reflect.* |
3
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13 |
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14 /** |
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15 * Delegate that makes a var that can only be set once. This is commonly |
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16 * needed in Swing, because some vars inevitably need to be declared at |
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17 * outer levels but initialized in the Swing event dispatch thread. |
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18 */ |
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19 class SetOnce<T: Any>: ReadWriteProperty<Any?,T> { |
5 | 20 private var setOnceValue: T? = null |
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21 |
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22 override operator fun getValue(thisRef: Any?, property: KProperty<*>): T { |
5 | 23 if (setOnceValue == null) { |
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24 throw RuntimeException("${property.name} has not been initialized") |
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25 } else { |
5 | 26 return setOnceValue!! |
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27 } |
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28 } |
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29 |
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30 @Synchronized |
5 | 31 override operator fun setValue(thisRef: Any?, property: KProperty<*>, value: T): Unit { |
32 if (setOnceValue != null) { | |
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33 throw RuntimeException("${property.name} has already been initialized") |
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34 } |
5 | 35 setOnceValue = value |
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36 } |
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37 } |
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38 |
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39 /** |
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40 * Run something in the Swing thread, asynchronously. |
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41 * @param block lambda containing code to run |
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42 */ |
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43 fun inSwingThread(block: () -> Unit) { |
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44 SwingUtilities.invokeLater(Runnable(block)) |
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45 } |
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46 |
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47 /** |
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48 * Run something in the Swing thread, synchronously. |
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49 * @param block lambda containing code to run |
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50 */ |
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51 fun inSynSwingThread(block: () -> Unit) { |
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52 SwingUtilities.invokeAndWait(Runnable(block)) |
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53 } |
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54 |
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55 /** |
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56 * Make a shortcut for a menu item, using the standard combining key |
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57 * (control, command, etc.) for the system we're on. |
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58 * @param key KeyEvent constant describing the key |
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59 */ |
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60 fun JMenuItem.makeShortcut(key: Int): Unit { |
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61 val SC_KEY_MASK = Toolkit.getDefaultToolkit().menuShortcutKeyMask |
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62 setAccelerator(KeyStroke.getKeyStroke(key, SC_KEY_MASK)) |
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63 } |
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64 |
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65 /** |
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66 * Given a MenuElement object, get the item whose text matches the |
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67 * specified text. |
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68 * @param text to match |
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69 * @return first matched element, null if no match found |
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70 */ |
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71 fun MenuElement.getItem(name: String) : JMenuItem? { |
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72 subElements.forEach { |
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73 val jMenuItem = it.component as? JMenuItem |
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74 if (jMenuItem?.text == name) { |
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75 return jMenuItem |
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76 } |
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77 } |
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78 return null |
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79 } |
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80 |
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81 /** |
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82 * Change to the standard wait cursor. |
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83 */ |
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84 fun Component.useWaitCursor() { |
5 | 85 this.cursor = Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR) |
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86 } |
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87 |
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88 /** |
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89 * Return back to the normal cursor(). |
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90 */ |
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91 fun Component.useNormalCursor() { |
5 | 92 this.cursor = Cursor.getDefaultCursor() |
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93 } |
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94 |
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95 /** |
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96 * Thrown if the programmer botches something in our DSL. |
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97 */ |
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98 class SwingWorkerException(message: String): Exception(message) { } |
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99 |
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100 /** |
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101 * A simplified SwingWorker DSL. It does not support intermediate |
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102 * results. Just lets one define a background task and something |
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103 * to execute when complete. |
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104 * |
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105 * @param T Type returned by inBackground (Java doInBackground) task. |
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106 */ |
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107 class SwingWorkerBuilder<T>: SwingWorker<T,Unit>() { |
5 | 108 private var inBackgroundLambda: (SwingWorkerBuilder<T>.() -> T)? = null |
109 private var whenDoneLambda: (SwingWorkerBuilder<T>.() -> Unit)? = null | |
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110 |
5 | 111 private fun <U> setOnce(prop: KMutableProperty0<(SwingWorkerBuilder<T>.() -> U)?>, value: SwingWorkerBuilder<T>.() -> U) { |
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112 if (prop.get() != null) { |
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113 throw SwingWorkerException(prop.name.removeSuffix("Lambda") + " already defined!") |
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114 } |
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115 prop.set(value) |
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116 } |
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117 |
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118 /** |
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119 * Define the inBackground task. |
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120 */ |
5 | 121 fun inBackground(lambda: SwingWorkerBuilder<T>.() -> T): Unit { |
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122 setOnce<T>(::inBackgroundLambda, lambda) |
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123 } |
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124 |
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125 /** |
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126 * Define the whenDone task. |
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127 */ |
5 | 128 fun whenDone(lambda: SwingWorkerBuilder<T>.() -> Unit): Unit { |
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129 setOnce<Unit>(::whenDoneLambda, lambda) |
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130 } |
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131 |
5 | 132 /** |
133 * Validates we've been properly initialized. | |
134 */ | |
135 fun validate(): Unit { | |
136 if (inBackgroundLambda == null) { | |
137 throw SwingWorkerException("inBackground not defined!") | |
138 } | |
139 } | |
140 | |
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141 /* standard overrides for SwingWorker follow */ |
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142 |
5 | 143 override fun doInBackground(): T = inBackgroundLambda!!.invoke(this) |
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144 |
5 | 145 override fun done(): Unit = whenDoneLambda?.invoke(this) ?: Unit |
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146 } |
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147 |
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148 /** |
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149 * Provides for an outer swingWorker block to contain the DSL. |
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David Barts <n5jrn@me.com>
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150 */ |
5 | 151 fun <T> swingWorker(initializer: SwingWorkerBuilder<T>.() -> Unit): Unit { |
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David Barts <n5jrn@me.com>
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152 SwingWorkerBuilder<T>().run { |
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153 initializer() |
5 | 154 validate() |
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David Barts <n5jrn@me.com>
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155 execute() |
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David Barts <n5jrn@me.com>
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156 } |
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David Barts <n5jrn@me.com>
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157 } |
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David Barts <n5jrn@me.com>
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158 |
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David Barts <n5jrn@me.com>
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159 /** |
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David Barts <n5jrn@me.com>
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160 * Close a dialog (don't just hide it). |
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Code to make it a proper Mac GUI app. Untested!
David Barts <n5jrn@me.com>
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161 */ |
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David Barts <n5jrn@me.com>
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162 fun JDialog.close() { |
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David Barts <n5jrn@me.com>
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163 setVisible(false) |
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David Barts <n5jrn@me.com>
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164 dispose() |
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David Barts <n5jrn@me.com>
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165 } |