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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.clipman
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5
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6 import java.awt.Dimension
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7 import java.awt.Toolkit
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8 import javax.swing.*
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9 import javax.swing.text.JTextComponent
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10
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11 /**
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12 * Allows a val to have lateinit functionality. It is an error to attempt
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13 * to retrieve this object's value unless it has been set, and it is an
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14 * error to attempt to set the value of an already-set object.
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15 * @param <T> type of the associated value
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16 */
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17 class LateInit<T> {
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18 private var _v: T? = null
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19
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20 /**
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21 * The value associated with this object. The name of this property is
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22 * deliberately short.
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23 */
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24 var v: T
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25 get() {
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26 if (_v == null) {
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27 throw IllegalStateException("cannot retrieve un-initialized value")
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28 } else {
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29 return _v!!
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30 }
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31 }
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32 @Synchronized set(value) {
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33 if (_v != null) {
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34 throw IllegalStateException("cannot set already-initialized value")
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35 }
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36 _v = value
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37 }
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38 }
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39
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40 /**
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41 * Run something in the Swing thread, asynchronously.
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42 * @param block lambda containing code to run
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43 */
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44 fun inSwingThread(block: () -> Unit) {
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45 SwingUtilities.invokeLater(Runnable(block))
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46 }
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47
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48 /**
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49 * Run something in the Swing thread, synchronously.
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50 * @param block lambda containing code to run
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51 */
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52 fun inSynSwingThread(block: () -> Unit) {
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53 SwingUtilities.invokeAndWait(Runnable(block))
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54 }
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55
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56 /**
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57 * Autosize a JTextComponent to a given width.
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58 * @param width the width
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59 */
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60 fun JTextComponent.autoSize(width: Int): Unit {
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61 val SLOP = 10
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62 val dim = Dimension(width, width)
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63 preferredSize = dim
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64 size = dim
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65 val r = modelToView(document.length)
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66 preferredSize = Dimension(width, r.y + r.height + SLOP)
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67 }
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68
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69 /**
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70 * Make a shortcut for a menu item, using the standard combining key
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71 * (control, command, etc.) for the system we're on.
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72 * @param key KeyEvent constant describing the key
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73 */
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74 fun JMenuItem.makeShortcut(key: Int): Unit {
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75 val SC_KEY_MASK = Toolkit.getDefaultToolkit().menuShortcutKeyMask
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76 setAccelerator(KeyStroke.getKeyStroke(key, SC_KEY_MASK))
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77 }
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78
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79 /**
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80 * Given a MenuElement object, get the item whose text matches the
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81 * specified text.
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82 * @param text to match
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83 * @return first matched element, null if no match found
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84 */
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85 fun MenuElement.getItem(name: String) : JMenuItem? {
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86 subElements.forEach {
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87 val jMenuItem = it.component as? JMenuItem
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88 if (jMenuItem?.text == name) {
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89 return jMenuItem
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90 }
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91 }
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92 return null
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93 }
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94
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