Class BasicScrollBarUI.TrackListener

java.lang.Object
java.awt.event.MouseAdapter
javax.swing.plaf.basic.BasicScrollBarUI.TrackListener
All Implemented Interfaces:
MouseListener, MouseMotionListener, MouseWheelListener, EventListener
Enclosing class:
BasicScrollBarUI
protected class BasicScrollBarUI.TrackListener extends MouseAdapter implements MouseMotionListener
Track mouse drags.

  • Field Details

    • offset

      protected transient int offset
      The offset

    • currentMouseX

      protected transient int currentMouseX
      Current mouse x position

    • currentMouseY

      protected transient int currentMouseY
      Current mouse y position

  • Constructor Details

    • TrackListener

      protected TrackListener()
      Constructs a TrackListener.

  • Method Details

    • mousePressed

      public void mousePressed(MouseEvent e)
      If the mouse is pressed above the "thumb" component then reduce the scrollbars value by one page ("page up"), otherwise increase it by one page. If there is no thumb then page up if the mouse is in the upper half of the track.
      Specified by:
      mousePressed in interface MouseListener
      Parameters:
      e - the event to be processed

    • mouseDragged

      public void mouseDragged(MouseEvent e)
      Set the models value to the position of the thumb's top of Vertical scrollbar, or the left/right of Horizontal scrollbar in left-to-right/right-to-left scrollbar relative to the origin of the track.
      Specified by:
      mouseDragged in interface MouseMotionListener
      Overrides:
      mouseDragged in class MouseAdapter
      Parameters:
      e - the event to be processed

    • mouseMoved

      public void mouseMoved(MouseEvent e)
      Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.
      Specified by:
      mouseMoved in interface MouseMotionListener
      Overrides:
      mouseMoved in class MouseAdapter
      Parameters:
      e - the event to be processed

    • mouseExited

      public void mouseExited(MouseEvent e)
      Invoked when the mouse exits the scrollbar.
      Specified by:
      mouseExited in interface MouseListener
      Parameters:
      e - MouseEvent further describing the event
      Since:
      1.5