MirOS Manual: XClearArea(3), XClearWindow(3)


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

NAME

     XClearArea, XClearWindow - clear area or window

SYNTAX

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

     int XClearWindow(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 dimen-
               sions of the rectangle. and specify the upper-left
               corner of the rectangle

     x
     y         Specify the x and y coordinates, which are rela-
               tive to the origin of the window.

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 back-
     ground 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.

XFree86                   Version 4.5.0                         1

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

     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 argument, the full range
               defined by the argument's type is accepted.  Any
               argument defined as a set of alternatives can gen-
               erate this error.

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

SEE ALSO

     XCopyArea(3X11)
     Xlib - C Language X Interface

XFree86                   Version 4.5.0                         2

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