Интерактивная система просмотра системных руководств (man-ов)
XClearArea (3)
>> XClearArea (3) ( Разные man: Библиотечные вызовы )
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 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.
#include <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 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.
