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author | Ingo Maier <ingo.maier@epfl.ch> | 2011-08-12 14:49:38 +0000 |
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committer | Ingo Maier <ingo.maier@epfl.ch> | 2011-08-12 14:49:38 +0000 |
commit | 48fcd8a7942775aaa55f047b5f8615ba54321127 (patch) | |
tree | 5e4c87d6da0879f5a2fe5bbf46ae30dc3aea5bc3 /src/swing | |
parent | febd8857dda25f79704031e5bd2005b7271025c1 (diff) | |
download | scala-48fcd8a7942775aaa55f047b5f8615ba54321127.tar.gz scala-48fcd8a7942775aaa55f047b5f8615ba54321127.tar.bz2 scala-48fcd8a7942775aaa55f047b5f8615ba54321127.zip |
Install mouse moves listeners lazily.
Diffstat (limited to 'src/swing')
-rw-r--r-- | src/swing/scala/swing/Component.scala | 45 |
1 files changed, 27 insertions, 18 deletions
diff --git a/src/swing/scala/swing/Component.scala b/src/swing/scala/swing/Component.scala index 5eaff35bb0..9b7fd726ef 100644 --- a/src/swing/scala/swing/Component.scala +++ b/src/swing/scala/swing/Component.scala @@ -6,8 +6,6 @@ ** |/ ** \* */ - - package scala.swing import event._ @@ -120,8 +118,6 @@ abstract class Component extends UIElement { }) }*/ - - @deprecated("Use mouse instead", "2.8.0") lazy val Mouse = mouse /** @@ -132,10 +128,10 @@ abstract class Component extends UIElement { /** * Publishes clicks, presses and releases. */ - val clicks: Publisher = new Publisher { - peer.addMouseListener(new MouseListener { - def mouseEntered(e: java.awt.event.MouseEvent) { } - def mouseExited(e: java.awt.event.MouseEvent) { } + val clicks: Publisher = new LazyPublisher { + lazy val l = new MouseListener { + def mouseEntered(e: java.awt.event.MouseEvent) {} + def mouseExited(e: java.awt.event.MouseEvent) {} def mouseClicked(e: java.awt.event.MouseEvent) { publish(new MouseClicked(e)) } @@ -145,13 +141,16 @@ abstract class Component extends UIElement { def mouseReleased(e: java.awt.event.MouseEvent) { publish(new MouseReleased(e)) } - }) + } + + def onFirstSubscribe() = peer.addMouseListener(l) + def onLastUnsubscribe() = peer.removeMouseListener(l) } /** * Publishes enters, exits, moves, and drags. */ - val moves: Publisher = new Publisher { - peer.addMouseListener(new MouseListener { + val moves: Publisher = new LazyPublisher { + lazy val mouseListener = new MouseListener { def mouseEntered(e: java.awt.event.MouseEvent) { publish(new MouseEntered(e)) } @@ -159,17 +158,26 @@ abstract class Component extends UIElement { publish(new MouseExited(e)) } def mouseClicked(e: java.awt.event.MouseEvent) {} - def mousePressed(e: java.awt.event.MouseEvent) { } - def mouseReleased(e: java.awt.event.MouseEvent) { } - }) - peer.addMouseMotionListener(new MouseMotionListener { + def mousePressed(e: java.awt.event.MouseEvent) {} + def mouseReleased(e: java.awt.event.MouseEvent) {} + } + + lazy val mouseMotionListener = new MouseMotionListener { def mouseMoved(e: java.awt.event.MouseEvent) { publish(new MouseMoved(e)) } def mouseDragged(e: java.awt.event.MouseEvent) { publish(new MouseDragged(e)) } - }) + } + def onFirstSubscribe() { + peer.addMouseListener(mouseListener) + peer.addMouseMotionListener(mouseMotionListener) + } + def onLastUnsubscribe() { + peer.removeMouseListener(mouseListener) + peer.removeMouseMotionListener(mouseMotionListener) + } } /** * Publishes mouse wheel moves. @@ -178,9 +186,10 @@ abstract class Component extends UIElement { // We need to subscribe lazily and unsubscribe, since components in scroll panes capture // mouse wheel events if there is a listener installed. See ticket #1442. lazy val l = new MouseWheelListener { - def mouseWheelMoved(e: java.awt.event.MouseWheelEvent) { - publish(new MouseWheelMoved(e)) } + def mouseWheelMoved(e: java.awt.event.MouseWheelEvent) { + publish(new MouseWheelMoved(e)) } + } def onFirstSubscribe() = peer.addMouseWheelListener(l) def onLastUnsubscribe() = peer.removeMouseWheelListener(l) } |