IT. Expert System.

public class ScrollBarDrawable
extends Drawable

• Nested Class Summary

  • Nested classes/interfaces inherited from class android.graphics.drawable.Drawable

    Drawable.Callback, Drawable.ConstantState

• Constructor Summary

  Constructors

  Constructor and Description
  ScrollBarDrawable()

• Method Summary

  Methods

  Modifier and Type	Method and Description
  void	draw(Canvas canvas) Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).
  protected void	drawThumb(Canvas canvas, Rect bounds, int offset, int length, boolean vertical)
  protected void	drawTrack(Canvas canvas, Rect bounds, boolean vertical)
  boolean	getAlwaysDrawHorizontalTrack() Indicates whether the horizontal scrollbar track should always be drawn regardless of the extent.
  boolean	getAlwaysDrawVerticalTrack() Indicates whether the vertical scrollbar track should always be drawn regardless of the extent.
  int	getOpacity() Return the opacity/transparency of this Drawable.
  int	getSize(boolean vertical)
  protected void	onBoundsChange(Rect bounds) Override this in your subclass to change appearance if you recognize the specified state.
  void	setAlpha(int alpha) Specify an alpha value for the drawable.
  void	setAlwaysDrawHorizontalTrack(boolean alwaysDrawTrack) Indicate whether the horizontal scrollbar track should always be drawn regardless of the extent.
  void	setAlwaysDrawVerticalTrack(boolean alwaysDrawTrack) Indicate whether the vertical scrollbar track should always be drawn regardless of the extent.
  void	setColorFilter(ColorFilter cf) Specify an optional colorFilter for the drawable.
  void	setHorizontalThumbDrawable(Drawable thumb)
  void	setHorizontalTrackDrawable(Drawable track)
  void	setParameters(int range, int offset, int extent, boolean vertical)
  void	setVerticalThumbDrawable(Drawable thumb)
  void	setVerticalTrackDrawable(Drawable track)
  String	toString() Returns a string containing a concise, human-readable description of this object.

  • Methods inherited from class android.graphics.drawable.Drawable

    clearColorFilter, copyBounds, copyBounds, createFromPath, createFromResourceStream, createFromResourceStream, createFromStream, createFromXml, createFromXmlInner, getBounds, getCallback, getChangingConfigurations, getConstantState, getCurrent, getIntrinsicHeight, getIntrinsicWidth, getLayoutDirection, getLayoutInsets, getLevel, getMinimumHeight, getMinimumWidth, getPadding, getState, getTransparentRegion, inflate, invalidateSelf, isStateful, isVisible, jumpToCurrentState, mutate, onLevelChange, onStateChange, resolveOpacity, scheduleSelf, setBounds, setBounds, setCallback, setChangingConfigurations, setColorFilter, setDither, setFilterBitmap, setLayoutDirection, setLevel, setState, setVisible, unscheduleSelf

  • Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

• Constructor Detail

  • ScrollBarDrawable

    public ScrollBarDrawable()

• Method Detail

  • setAlwaysDrawHorizontalTrack

    public void setAlwaysDrawHorizontalTrack(boolean alwaysDrawTrack)

    Indicate whether the horizontal scrollbar track should always be drawn regardless of the extent. Defaults to false.

    Parameters:

    alwaysDrawTrack - Set to true if the track should always be drawn

  • setAlwaysDrawVerticalTrack

    public void setAlwaysDrawVerticalTrack(boolean alwaysDrawTrack)

    Indicate whether the vertical scrollbar track should always be drawn regardless of the extent. Defaults to false.

    Parameters:

    alwaysDrawTrack - Set to true if the track should always be drawn

  • getAlwaysDrawVerticalTrack

    public boolean getAlwaysDrawVerticalTrack()

    Indicates whether the vertical scrollbar track should always be drawn regardless of the extent.

  • getAlwaysDrawHorizontalTrack

    public boolean getAlwaysDrawHorizontalTrack()

    Indicates whether the horizontal scrollbar track should always be drawn regardless of the extent.

  • setParameters

    public void setParameters(int range,
                     int offset,
                     int extent,
                     boolean vertical)

  • draw

    public void draw(Canvas canvas)

    Description copied from class: Drawable
    Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).

    Specified by:

    draw in class Drawable

    Parameters:

    canvas - The canvas to draw into

  • onBoundsChange

    protected void onBoundsChange(Rect bounds)

    Description copied from class: Drawable
    Override this in your subclass to change appearance if you recognize the specified state.

    Overrides:

    onBoundsChange in class Drawable

  • drawTrack

    protected void drawTrack(Canvas canvas,
                 Rect bounds,
                 boolean vertical)

  • drawThumb

    protected void drawThumb(Canvas canvas,
                 Rect bounds,
                 int offset,
                 int length,
                 boolean vertical)

  • setVerticalThumbDrawable

    public void setVerticalThumbDrawable(Drawable thumb)

  • setVerticalTrackDrawable

    public void setVerticalTrackDrawable(Drawable track)

  • setHorizontalThumbDrawable

    public void setHorizontalThumbDrawable(Drawable thumb)

  • setHorizontalTrackDrawable

    public void setHorizontalTrackDrawable(Drawable track)

  • getSize

    public int getSize(boolean vertical)

  • setAlpha

    public void setAlpha(int alpha)

    Description copied from class: Drawable
    Specify an alpha value for the drawable. 0 means fully transparent, and 255 means fully opaque.

    Specified by:

    setAlpha in class Drawable

  • setColorFilter

    public void setColorFilter(ColorFilter cf)

    Description copied from class: Drawable
    Specify an optional colorFilter for the drawable. Pass null to remove any filters.

    Specified by:

    setColorFilter in class Drawable

  • getOpacity

    public int getOpacity()

    Description copied from class: Drawable
    Return the opacity/transparency of this Drawable. The returned value is one of the abstract format constants in PixelFormat: PixelFormat.UNKNOWN, PixelFormat.TRANSLUCENT, PixelFormat.TRANSPARENT, or PixelFormat.OPAQUE.

    Generally a Drawable should be as conservative as possible with the value it returns. For example, if it contains multiple child drawables and only shows one of them at a time, if only one of the children is TRANSLUCENT and the others are OPAQUE then TRANSLUCENT should be returned. You can use the method Drawable.resolveOpacity(int, int) to perform a standard reduction of two opacities to the appropriate single output.

    Note that the returned value does not take into account a custom alpha or color filter that has been applied by the client through the Drawable.setAlpha(int) or Drawable.setColorFilter(android.graphics.ColorFilter) methods.

    Specified by:

    getOpacity in class Drawable

    Returns:

    int The opacity class of the Drawable.

    See Also:

    PixelFormat

  • toString

    public String toString()

    Description copied from class: Object
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

       getClass().getName() + '@' + Integer.toHexString(hashCode())

    See Writing a useful toString method if you intend implementing your own toString method.

    Overrides:

    toString in class Object

    Returns:

    a printable representation of this object.