XParseGeometry(3X11) XLIB FUNCTIONS XParseGeometry(3X11)NAME
XParseGeometry, XWMGeometry - parse window geometry
SYNTAX
int XParseGeometry(parsestring, x_return, y_return,
width_return, height_return)
char *parsestring;
int *x_return, *y_return;
unsigned int *width_return, *height_return;
int XWMGeometry(display, screen, user_geom, def_geom,
bwidth, hints, x_return, y_return,
width_return, height_return,
gravity_return)
Display *display;
int screen;
char *user_geom;
char *def_geom;
unsigned int bwidth;
XSizeHints *hints;
int *x_return, *y_return;
int *width_return;
int *height_return;
int *gravity_return;
ARGUMENTS
position
default_position
Specify the geometry specifications.
display Specifies the connection to the X server.
fheight
fwidth Specify the font height and width in pixels
(increment size).
parsestring
Specifies the string you want to parse.
screen Specifies the screen.
width_return
height_return
Return the width and height determined.
xadder
yadder Specify additional interior padding needed in
the window.
x_return
y_return Return the x and y offsets.
bwidth Specifies the border width.
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XParseGeometry(3X11) XLIB FUNCTIONS XParseGeometry(3X11)
hints Specifies the size hints for the window in its
normal state.
def_geom Specifies the application's default geometry or
NULL.
gravity_return
Returns the window gravity.
user_geom Specifies the user-specified geometry or NULL.
DESCRIPTION
By convention, X applications use a standard string to
indicate window size and placement. XParseGeometry makes
it easier to conform to this standard because it allows
you to parse the standard window geometry. Specifically,
this function lets you parse strings of the form:
[=][<width>{xX}<height>][{+-}<xoffset>{+-}<yoffset>]
The fields map into the arguments associated with this
function. (Items enclosed in <> are integers, items in []
are optional, and items enclosed in {} indicate ``choose
one of.'' Note that the brackets should not appear in the
actual string.) If the string is not in the Host Portable
Character Encoding, the result is implementation-depen-
dent.
The XParseGeometry function returns a bitmask that indi-
cates which of the four values (width, height, xoffset,
and yoffset) were actually found in the string and whether
the x and y values are negative. By convention, -0 is not
equal to +0, because the user needs to be able to say
``position the window relative to the right or bottom
edge.'' For each value found, the corresponding argument
is updated. For each value not found, the argument is
left unchanged. The bits are represented by XValue,
YValue, WidthValue, HeightValue, XNegative, or YNegative
and are defined in <X11/Xutil.h>. They will be set when-
ever one of the values is defined or one of the signs is
set.
If the function returns either the XValue or YValue flag,
you should place the window at the requested position.
The XWMGeometry function combines any geometry information
(given in the format used by XParseGeometry) specified by
the user and by the calling program with size hints (usu-
ally the ones to be stored in WM_NORMAL_HINTS) and returns
the position, size, and gravity (NorthWestGravity,
NorthEastGravity, SouthEastGravity, or SouthWestGravity)
that describe the window. If the base size is not set in
the XSizeHints structure, the minimum size is used if set.
Otherwise, a base size of zero is assumed. If no minimum
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XParseGeometry(3X11) XLIB FUNCTIONS XParseGeometry(3X11)
size is set in the hints structure, the base size is used.
A mask (in the form returned by XParseGeometry) that
describes which values came from the user specification
and whether or not the position coordinates are relative
to the right and bottom edges is returned. Note that
these coordinates will have already been accounted for in
the x_return and y_return values.
Note that invalid geometry specifications can cause a
width or height of zero to be returned. The caller may
pass the address of the hints win_gravity field as grav-
ity_return to update the hints directly.
SEE ALSOXSetWMProperties(3X11)
Xlib - C Language X Interface
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