IT. Expert System.

public class Gravity
extends Object

• Field Summary

  Fields

  Modifier and Type	Field and Description
  static int	AXIS_CLIP Raw bit controlling whether the right/bottom edge is clipped to its container, based on the gravity direction being applied.
  static int	AXIS_PULL_AFTER Raw bit controlling how the right/bottom edge is placed.
  static int	AXIS_PULL_BEFORE Raw bit controlling how the left/top edge is placed.
  static int	AXIS_SPECIFIED Raw bit indicating the gravity for an axis has been specified.
  static int	AXIS_X_SHIFT Bits defining the horizontal axis.
  static int	AXIS_Y_SHIFT Bits defining the vertical axis.
  static int	BOTTOM Push object to the bottom of its container, not changing its size.
  static int	CENTER Place the object in the center of its container in both the vertical and horizontal axis, not changing its size.
  static int	CENTER_HORIZONTAL Place object in the horizontal center of its container, not changing its size.
  static int	CENTER_VERTICAL Place object in the vertical center of its container, not changing its size.
  static int	CLIP_HORIZONTAL Flag to clip the edges of the object to its container along the horizontal axis.
  static int	CLIP_VERTICAL Flag to clip the edges of the object to its container along the vertical axis.
  static int	DISPLAY_CLIP_HORIZONTAL Special constant to enable clipping to an overall display along the horizontal dimension.
  static int	DISPLAY_CLIP_VERTICAL Special constant to enable clipping to an overall display along the vertical dimension.
  static int	END Push object to x-axis position at the end of its container, not changing its size.
  static int	FILL Grow the horizontal and vertical size of the object if needed so it completely fills its container.
  static int	FILL_HORIZONTAL Grow the horizontal size of the object if needed so it completely fills its container.
  static int	FILL_VERTICAL Grow the vertical size of the object if needed so it completely fills its container.
  static int	HORIZONTAL_GRAVITY_MASK Binary mask to get the absolute horizontal gravity of a gravity.
  static int	LEFT Push object to the left of its container, not changing its size.
  static int	NO_GRAVITY Constant indicating that no gravity has been set
  static int	RELATIVE_HORIZONTAL_GRAVITY_MASK Binary mask for the horizontal gravity and script specific direction bit.
  static int	RELATIVE_LAYOUT_DIRECTION Raw bit controlling whether the layout direction is relative or not (START/END instead of absolute LEFT/RIGHT).
  static int	RIGHT Push object to the right of its container, not changing its size.
  static int	START Push object to x-axis position at the start of its container, not changing its size.
  static int	TOP Push object to the top of its container, not changing its size.
  static int	VERTICAL_GRAVITY_MASK Binary mask to get the vertical gravity of a gravity.

• Constructor Summary

  Constructors

  Constructor and Description
  Gravity()

• Method Summary

  Methods

  Modifier and Type	Method and Description
  static void	apply(int gravity, int w, int h, Rect container, int xAdj, int yAdj, Rect outRect) Apply a gravity constant to an object.
  static void	apply(int gravity, int w, int h, Rect container, int xAdj, int yAdj, Rect outRect, int layoutDirection) Apply a gravity constant to an object.
  static void	apply(int gravity, int w, int h, Rect container, Rect outRect) Apply a gravity constant to an object.
  static void	apply(int gravity, int w, int h, Rect container, Rect outRect, int layoutDirection) Apply a gravity constant to an object and take care if layout direction is RTL or not.
  static void	applyDisplay(int gravity, Rect display, Rect inoutObj) Apply additional gravity behavior based on the overall "display" that an object exists in.
  static void	applyDisplay(int gravity, Rect display, Rect inoutObj, int layoutDirection) Apply additional gravity behavior based on the overall "display" that an object exists in.
  static int	getAbsoluteGravity(int gravity, int layoutDirection) Convert script specific gravity to absolute horizontal value.
  static boolean	isHorizontal(int gravity) Indicate whether the supplied gravity has an horizontal pull.
  static boolean	isVertical(int gravity) Indicate whether the supplied gravity has a vertical pull.

  • Methods inherited from class java.lang.Object

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

• Field Detail

  • NO_GRAVITY

    public static final int NO_GRAVITY

    Constant indicating that no gravity has been set

    See Also:

    Constant Field Values

  • AXIS_SPECIFIED

    public static final int AXIS_SPECIFIED

    Raw bit indicating the gravity for an axis has been specified.

    See Also:

    Constant Field Values

  • AXIS_PULL_BEFORE

    public static final int AXIS_PULL_BEFORE

    Raw bit controlling how the left/top edge is placed.

    See Also:

    Constant Field Values

  • AXIS_PULL_AFTER

    public static final int AXIS_PULL_AFTER

    Raw bit controlling how the right/bottom edge is placed.

    See Also:

    Constant Field Values

  • AXIS_CLIP

    public static final int AXIS_CLIP

    Raw bit controlling whether the right/bottom edge is clipped to its container, based on the gravity direction being applied.

    See Also:

    Constant Field Values

  • AXIS_X_SHIFT

    public static final int AXIS_X_SHIFT

    Bits defining the horizontal axis.

    See Also:

    Constant Field Values

  • AXIS_Y_SHIFT

    public static final int AXIS_Y_SHIFT

    Bits defining the vertical axis.

    See Also:

    Constant Field Values

  • TOP

    public static final int TOP

    Push object to the top of its container, not changing its size.

    See Also:

    Constant Field Values

  • BOTTOM

    public static final int BOTTOM

    Push object to the bottom of its container, not changing its size.

    See Also:

    Constant Field Values

  • LEFT

    public static final int LEFT

    Push object to the left of its container, not changing its size.

    See Also:

    Constant Field Values

  • RIGHT

    public static final int RIGHT

    Push object to the right of its container, not changing its size.

    See Also:

    Constant Field Values

  • CENTER_VERTICAL

    public static final int CENTER_VERTICAL

    Place object in the vertical center of its container, not changing its size.

    See Also:

    Constant Field Values

  • FILL_VERTICAL

    public static final int FILL_VERTICAL

    Grow the vertical size of the object if needed so it completely fills its container.

    See Also:

    Constant Field Values

  • CENTER_HORIZONTAL

    public static final int CENTER_HORIZONTAL

    Place object in the horizontal center of its container, not changing its size.

    See Also:

    Constant Field Values

  • FILL_HORIZONTAL

    public static final int FILL_HORIZONTAL

    Grow the horizontal size of the object if needed so it completely fills its container.

    See Also:

    Constant Field Values

  • CENTER

    public static final int CENTER

    Place the object in the center of its container in both the vertical and horizontal axis, not changing its size.

    See Also:

    Constant Field Values

  • FILL

    public static final int FILL

    Grow the horizontal and vertical size of the object if needed so it completely fills its container.

    See Also:

    Constant Field Values

  • CLIP_VERTICAL

    public static final int CLIP_VERTICAL

    Flag to clip the edges of the object to its container along the vertical axis.

    See Also:

    Constant Field Values

  • CLIP_HORIZONTAL

    public static final int CLIP_HORIZONTAL

    Flag to clip the edges of the object to its container along the horizontal axis.

    See Also:

    Constant Field Values

  • RELATIVE_LAYOUT_DIRECTION

    public static final int RELATIVE_LAYOUT_DIRECTION

    Raw bit controlling whether the layout direction is relative or not (START/END instead of absolute LEFT/RIGHT).

    See Also:

    Constant Field Values

  • HORIZONTAL_GRAVITY_MASK

    public static final int HORIZONTAL_GRAVITY_MASK

    Binary mask to get the absolute horizontal gravity of a gravity.

    See Also:

    Constant Field Values

  • VERTICAL_GRAVITY_MASK

    public static final int VERTICAL_GRAVITY_MASK

    Binary mask to get the vertical gravity of a gravity.

    See Also:

    Constant Field Values

  • DISPLAY_CLIP_VERTICAL

    public static final int DISPLAY_CLIP_VERTICAL

    Special constant to enable clipping to an overall display along the vertical dimension. This is not applied by default by apply(int, int, int, Rect, int, int, Rect); you must do so yourself by calling applyDisplay(int, android.graphics.Rect, android.graphics.Rect).

    See Also:

    Constant Field Values

  • DISPLAY_CLIP_HORIZONTAL

    public static final int DISPLAY_CLIP_HORIZONTAL

    Special constant to enable clipping to an overall display along the horizontal dimension. This is not applied by default by apply(int, int, int, Rect, int, int, Rect); you must do so yourself by calling applyDisplay(int, android.graphics.Rect, android.graphics.Rect).

    See Also:

    Constant Field Values

  • START

    public static final int START

    Push object to x-axis position at the start of its container, not changing its size.

    See Also:

    Constant Field Values

  • END

    public static final int END

    Push object to x-axis position at the end of its container, not changing its size.

    See Also:

    Constant Field Values

  • RELATIVE_HORIZONTAL_GRAVITY_MASK

    public static final int RELATIVE_HORIZONTAL_GRAVITY_MASK

    Binary mask for the horizontal gravity and script specific direction bit.

    See Also:

    Constant Field Values

• Constructor Detail

  • Gravity

    public Gravity()

• Method Detail

  • apply

    public static void apply(int gravity,
             int w,
             int h,
             Rect container,
             Rect outRect)

    Apply a gravity constant to an object. This suppose that the layout direction is LTR.

    Parameters:

    gravity - The desired placement of the object, as defined by the constants in this class.

    w - The horizontal size of the object.

    h - The vertical size of the object.

    container - The frame of the containing space, in which the object will be placed. Should be large enough to contain the width and height of the object.

    outRect - Receives the computed frame of the object in its container.

  • apply

    public static void apply(int gravity,
             int w,
             int h,
             Rect container,
             Rect outRect,
             int layoutDirection)

    Apply a gravity constant to an object and take care if layout direction is RTL or not.

    Parameters:

    gravity - The desired placement of the object, as defined by the constants in this class.

    w - The horizontal size of the object.

    h - The vertical size of the object.

    container - The frame of the containing space, in which the object will be placed. Should be large enough to contain the width and height of the object.

    outRect - Receives the computed frame of the object in its container.

    layoutDirection - The layout direction.

    See Also:

    View.LAYOUT_DIRECTION_LTR, View.LAYOUT_DIRECTION_RTL

  • apply

    public static void apply(int gravity,
             int w,
             int h,
             Rect container,
             int xAdj,
             int yAdj,
             Rect outRect)

    Apply a gravity constant to an object.

    Parameters:

    gravity - The desired placement of the object, as defined by the constants in this class.

    w - The horizontal size of the object.

    h - The vertical size of the object.

    container - The frame of the containing space, in which the object will be placed. Should be large enough to contain the width and height of the object.

    xAdj - Offset to apply to the X axis. If gravity is LEFT this pushes it to the right; if gravity is RIGHT it pushes it to the left; if gravity is CENTER_HORIZONTAL it pushes it to the right or left; otherwise it is ignored.

    yAdj - Offset to apply to the Y axis. If gravity is TOP this pushes it down; if gravity is BOTTOM it pushes it up; if gravity is CENTER_VERTICAL it pushes it down or up; otherwise it is ignored.

    outRect - Receives the computed frame of the object in its container.

  • apply

    public static void apply(int gravity,
             int w,
             int h,
             Rect container,
             int xAdj,
             int yAdj,
             Rect outRect,
             int layoutDirection)

    Apply a gravity constant to an object.

    Parameters:

    gravity - The desired placement of the object, as defined by the constants in this class.

    w - The horizontal size of the object.

    h - The vertical size of the object.

    container - The frame of the containing space, in which the object will be placed. Should be large enough to contain the width and height of the object.

    xAdj - Offset to apply to the X axis. If gravity is LEFT this pushes it to the right; if gravity is RIGHT it pushes it to the left; if gravity is CENTER_HORIZONTAL it pushes it to the right or left; otherwise it is ignored.

    yAdj - Offset to apply to the Y axis. If gravity is TOP this pushes it down; if gravity is BOTTOM it pushes it up; if gravity is CENTER_VERTICAL it pushes it down or up; otherwise it is ignored.

    outRect - Receives the computed frame of the object in its container.

    layoutDirection - The layout direction.

    See Also:

    View.LAYOUT_DIRECTION_LTR, View.LAYOUT_DIRECTION_RTL

  • applyDisplay

    public static void applyDisplay(int gravity,
                    Rect display,
                    Rect inoutObj)

    Apply additional gravity behavior based on the overall "display" that an object exists in. This can be used after apply(int, int, int, Rect, int, int, Rect) to place the object within a visible display. By default this moves or clips the object to be visible in the display; the gravity flags DISPLAY_CLIP_HORIZONTAL and DISPLAY_CLIP_VERTICAL can be used to change this behavior.

    Parameters:

    gravity - Gravity constants to modify the placement within the display.

    display - The rectangle of the display in which the object is being placed.

    inoutObj - Supplies the current object position; returns with it modified if needed to fit in the display.

  • applyDisplay

    public static void applyDisplay(int gravity,
                    Rect display,
                    Rect inoutObj,
                    int layoutDirection)

    Apply additional gravity behavior based on the overall "display" that an object exists in. This can be used after apply(int, int, int, Rect, int, int, Rect) to place the object within a visible display. By default this moves or clips the object to be visible in the display; the gravity flags DISPLAY_CLIP_HORIZONTAL and DISPLAY_CLIP_VERTICAL can be used to change this behavior.

    Parameters:

    gravity - Gravity constants to modify the placement within the display.

    display - The rectangle of the display in which the object is being placed.

    inoutObj - Supplies the current object position; returns with it modified if needed to fit in the display.

    layoutDirection - The layout direction.

    See Also:

    View.LAYOUT_DIRECTION_LTR, View.LAYOUT_DIRECTION_RTL

  • isVertical

    public static boolean isVertical(int gravity)

    Indicate whether the supplied gravity has a vertical pull.

    Parameters:

    gravity - the gravity to check for vertical pull

    Returns:

    true if the supplied gravity has a vertical pull

  • isHorizontal

    public static boolean isHorizontal(int gravity)

    Indicate whether the supplied gravity has an horizontal pull.

    Parameters:

    gravity - the gravity to check for horizontal pull

    Returns:

    true if the supplied gravity has an horizontal pull

  • getAbsoluteGravity

    public static int getAbsoluteGravity(int gravity,
                         int layoutDirection)

    Convert script specific gravity to absolute horizontal value.

    if horizontal direction is LTR, then START will set LEFT and END will set RIGHT. if horizontal direction is RTL, then START will set RIGHT and END will set LEFT.

    Parameters:

    gravity - The gravity to convert to absolute (horizontal) values.

    layoutDirection - The layout direction.

    Returns:

    gravity converted to absolute (horizontal) values.