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


display Specifies the connection to the X server.
w Specifies the window. and specify the upper-left corner of the rectangle
Specify the x and y coordinates, which are relative to the origin of the window.
Specify the width and height, which are the dimensions of the rectangle.
exposures Specifies a Boolean value that indicates if Expose events are to be generated.


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.


BadMatch An InputOnly window is used as a Drawable.
BadMatch Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request.
BadValue Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, 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

XClearWindow(), XCopyArea(), "Clearing Areas".
Christophe Tronche, ch@tronche.com