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XClearArea(3X11)	       XLIB FUNCTIONS		     XClearArea(3X11)



NAME
  XClearArea, XClearWindow - clear area or window

SYNTAX
  XClearArea(display, w, x, y, width, height, exposures)
	Display *display;
	Window w;
	int x, y;
	unsigned int width, height;
	Bool exposures;

  XClearWindow(display, w)
	Display *display;
	Window w;

ARGUMENTS

  display   Specifies the connection to the X server.

  exposures Specifies a Boolean value that indicates if Expose events are to
	    be generated.

  w	    Specifies the window.

  width
  height    Specify the width and height, which are the dimensions of the
	    rectangle.

  x
  y	    Specify the x and y coordinates, which are relative to the origin
	    of the window and specify the upper-left corner of the rectangle.

DESCRIPTION
  The XClearArea function paints a rectangular area in the specified window
  according to the specified dimensions with the window's background pixel or
  pixmap.  The subwindow-mode effectively is ClipByChildren.  If width is
  zero, it is replaced with the current width of the window minus x.  If
  height is zero, it is replaced with the current height of the window minus
  y.  If the window has a defined background tile, the rectangle clipped by
  any children is filled with this tile.  If the window has background None,
  the contents of the window are not changed. In either case, if exposures is
  True, one or more Expose events are generated for regions of the rectangle
  that are either visible or are being retained in a backing store.  If you
  specify a window whose class is InputOnly, a BadMatch error results.

  XClearArea can generate BadMatch, BadValue, and BadWindow errors.

  The XClearWindow function clears the entire area in the specified window
  and is equivalent to XClearArea (display, w, 0, 0, 0, 0, False).  If the
  window has a defined background tile, the rectangle is tiled with a plane-
  mask of all ones and GXcopy function.	 If the window has background None,
  the contents of the window are not changed. If you specify a window whose
  class is InputOnly, a BadMatch error results.

  XClearWindow can generate BadMatch and BadWindow errors.




DIAGNOSTICS

  BadMatch  An InputOnly window is used as a Drawable.

  BadValue  Some numeric value falls outside the range of values accepted by
	    the request.  Unless a specific range is specified for an argu-
	    ment, the full range defined by the argument's type is accepted.
	    Any argument defined as a set of alternatives can generate this
	    error.

  BadWindow A value for a Window argument does not name a defined Window.

SEE ALSO
  XCopyArea(3X11)
  Xlib - C Language X Interface



















































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