Interface ScrollBarSkin

Method Details

• installComponents

  void installComponents(JScrollBar scrollBar)

  Called once at the begining of the skin's life cycle. Implementors should add components that will later be controlled in layoutTrackOnly(JScrollBar, ScrollBarOrientation) and layoutEverything(JScrollBar, ScrollBarOrientation).

  Parameters:

  scrollBar - the JScrollBar that the skin will be painting.

• installMouseListenersOnButtons

  void installMouseListenersOnButtons(MouseListener decrementMoustListener, MouseListener incrementMouseListener)

  Called once at the begining of the skin's life cycle. Implementors should attach these mouse listners to the controls that decrement and increment the scroll bar's value.

  Parameters:

  decrementMoustListener - the MouseListener to be notified when a control is pressed that should result in the scroll bar's value decrementing.

  incrementMouseListener - the MouseListener to be notified when a control is pressed that should result in the scroll bar's value incrementing.

• layoutTrackOnly

  void layoutTrackOnly(JScrollBar scrollBar, ScrollBarOrientation orientation)

  Called when only the track should be laid out by the skin. This occurs when a JScrollBar has been set to ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS or ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS and the corresponding view is showing all the content. Note that there are, in fact, no restrictions on what this method lays out. That is, if this skin wishes to layout more than just an empty track when there is no content to scroll, it may do so.

  Parameters:

  scrollBar - the JScrollBar that the skin is painting.

  orientation - the orientation of the scroll bar.

• layoutEverything

  void layoutEverything(JScrollBar scrollBar, ScrollBarOrientation orientation)

  Called when scroll bar should be laid out by the skin.

  Parameters:

  scrollBar - the JScrollBar that the skin is painting.

  orientation - the orientation of the scroll bar.

• getMinimumThumbSize

  Dimension getMinimumThumbSize()

  The smallest size that the scroll thumb can be.

  Returns:

  the mimimum size of the scroll thumb.

• getPreferredSize

  Dimension getPreferredSize()

  The preferred size of the painter, which will control the preferred size of the associated JScrollBar. For vertical scroll bars, this value will drive the width. For horiztonal scroll bars, this value will drive the height.

  Returns:

  the preferred size of this painter, and thus the corresponding JScrollBar.

• getScrollThumbBounds

  Rectangle getScrollThumbBounds()

  Gets the current bounds of the scroll thumb, which are controlled by the layout provided by this skin.

  Returns:

  the current bounds of the scroll thumb.

• setScrollThumbBounds

  void setScrollThumbBounds(Rectangle bounds)

  Sets the bounds of the scroll thumb. This method will be called, for example, when the associated JScrollBar's BoundedRangeModel is updated.

  Parameters:

  bounds - the new bounds of the scroll thumb.

• getTrackBounds

  Rectangle getTrackBounds()

  Gets the current bounds of the track, which are controlled by the layout provided by this skin. Note that the bounds returned by this method should be the actual scrollable bounds that the scroll thumb can move in. That is, this value should not just return the bounds of the associated JScrollBar, but only the bounds that are valid for the scroll thumb to exist in.

  Returns:

  the current bounds of the track.