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comparison src/name/blackcap/clipman/PasteboardQueue.kt @ 16:88703ca72fc3

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Make an efficiency improvement: cache the scrollPane.
author David Barts <n5jrn@me.com>
date Tue, 21 Jan 2020 13:07:35 -0800
parents d832c7b2bfd0
children c10a447b9e1b
comparison
equal deleted inserted replaced
15:732f92dc3bc6 16:88703ca72fc3
19 * exceeding the specified maximum size. 19 * exceeding the specified maximum size.
20 */ 20 */
21 class PasteboardQueue(val parent: Container, maxSize: Int) { 21 class PasteboardQueue(val parent: Container, maxSize: Int) {
22 private val queue = LinkedList<QueueItem>() 22 private val queue = LinkedList<QueueItem>()
23 private var _maxSize = maxSize 23 private var _maxSize = maxSize
24 private var scrollPane: JScrollPane? = null
25 init {
26 var sp: Container? = parent
27 while (sp != null) {
28 if (sp is JScrollPane) {
29 scrollPane = sp
30 break
31 }
32 sp = sp.parent
33 }
34 }
24 35
25 /** 36 /**
26 * The maximum allowed size of this queue. Attempts to make the queue 37 * The maximum allowed size of this queue. Attempts to make the queue
27 * larger than this size, or specifying a size smaller than the current 38 * larger than this size, or specifying a size smaller than the current
28 * size, will result in the oldest item(s) being discarded. A size less 39 * size, will result in the oldest item(s) being discarded. A size less
40 * @param item QueueItem to add 51 * @param item QueueItem to add
41 */ 52 */
42 @Synchronized fun add(item: QueueItem) { 53 @Synchronized fun add(item: QueueItem) {
43 inSwingThread { 54 inSwingThread {
44 parent.add(item.component) 55 parent.add(item.component)
45 /* XXX - assumes there is a JScrollPane above us in the tree */ 56 scrollPane?.run {
46 var sp = parent.parent
47 while (sp != null && !(sp is JScrollPane)) {
48 sp = sp.parent
49 }
50 (sp as JScrollPane).run {
51 validate() 57 validate()
52 verticalScrollBar.run { value = maximum + 1 } 58 verticalScrollBar.run { value = maximum + 1 }
53 } 59 }
54 } 60 }
55 queue.addLast(item) 61 queue.addLast(item)