File	Doc	Category	Size	Date	Package
ScrollIndLayer.java	API Doc	phoneME MR2 API (J2ME)	5125	Wed May 02 18:00:20 BST 2007	com.sun.midp.chameleon.layers

ScrollIndLayer

• java.lang.Object
  • CLayer

Fields Summary
public static final int	SCROLL_NONE Scrollbar operation types
public static final int	SCROLL_LINEUP
public static final int	SCROLL_LINEDOWN
public static final int	SCROLL_PAGEUP
public static final int	SCROLL_PAGEDOWN
public static final int	SCROLL_THUMBTRACK
private static ScrollIndLayer	scrollIndArrows scrollIndArrow layer is just one for all scrollable layers. It is chached and shared between all layers
protected CLayer	scrollable Scrollable layer
protected boolean	alertMode True if special alert indicator bar should be drawn instead of the regular one
protected ScrollListener	listener Scrolling listener. This layer is notified if the scroll indicator is changed

Constructors Summary
protected ScrollIndLayer(CLayer layer) Common constructor. param layer the scrollable controlling the scrolling layer super(); setOpaque(false); setSupportsInput(true); scrollable = layer; alertMode = scrollable instanceof AlertLayer;
public ScrollIndLayer(CLayer layer, ScrollListener listener) Additional constructor. param layer the scrollable controlling the scrolling layer param listener the scrolling listener this(layer); this.listener = listener;

Methods Summary
public static com.sun.midp.chameleon.layers.ScrollIndLayer	getInstance(int type) ScrollIndLayer s = null; switch (type) { case ScrollIndResourcesConstants.MODE_ARROWS: if (scrollIndArrows == null) { scrollIndArrows = new ScrollArrowLayer(null, null); } s = scrollIndArrows; break; case ScrollIndResourcesConstants.MODE_BAR: s = new ScrollBarLayer(null, null); break; default: break; } return s;
protected void	initialize() Called by MIDPWindow to initialize this layer super.initialize(); setBounds();
public abstract void	setBounds() Calculate layer bounds depending on the scrollable
public boolean	setListener(ScrollListener newListener) Set new listener param newListener new scrolling listener return true if the listener is changed, false - otherwise boolean ret = listener != newListener; if (ret) { listener = newListener; if (listener != null) { listener.updateScrollIndicator(); } } return ret;
public boolean	setScrollable(CLayer layer) Set new scrollable param layer new scrollable controlling the scrolling layer return true if the scrollable is changed, false - otherwise boolean ret = scrollable != layer; if (ret) { setVisible(false); scrollable = layer; alertMode = scrollable instanceof AlertLayer; } return ret;
public abstract void	setVerticalScroll(int scrollPosition, int scrollProportion) Set the current vertical scroll position and proportion. param scrollPosition vertical scroll position. param scrollProportion vertical scroll proportion.
public void	update(CLayer[] layers) Update bounds of layer param layers - current layer can be dependant on this parameter super.update(layers); setBounds();