XGraphicsExposeEvent(3X11)XLIB FUNCTIONXGraphicsExposeEvent(3X11)NAME
XGraphicsExposeEvent, XNoExposeEvent - GraphicsExpose and
NoExpose event structures
STRUCTURES
The structures for GraphicsExpose and NoExpose events con-
tain:
typedef struct {
int type; /* GraphicsExpose */
unsigned long serial; /* # of last request processed by server */
Bool send_event; /* true if this came from a SendEvent request */
Display *display; /* Display the event was read from */
Drawable drawable;
int x, y;
int width, height;
int count; /* if nonzero, at least this many more */
int major_code; /* core is CopyArea or CopyPlane */
int minor_code; /* not defined in the core */
} XGraphicsExposeEvent;
typedef struct {
int type; /* NoExpose */
unsigned long serial; /* # of last request processed by server */
Bool send_event; /* true if this came from a SendEvent request */
Display *display; /* Display the event was read from */
Drawable drawable;
int major_code; /* core is CopyArea or CopyPlane */
int minor_code; /* not defined in the core */
} XNoExposeEvent;
When you receive these events, their structure members are
set as follows.
The type member is set to the event type constant name
that uniquely identifies it. For example, when the X
server reports a GraphicsExpose event to a client applica-
tion, it sends an XGraphicsExposeEvent structure with the
type member set to GraphicsExpose. The display member is
set to a pointer to the display the event was read on.
The send_event member is set to True if the event came
from a SendEvent protocol request. The serial member is
set from the serial number reported in the protocol but
expanded from the 16-bit least-significant bits to a full
32-bit value. The window member is set to the window that
is most useful to toolkit dispatchers.
Both structures have these common members: drawable,
major_code, and minor_code. The drawable member is set to
the drawable of the destination region on which the graph-
ics request was to be performed. The major_code member is
set to the graphics request initiated by the client and
can be either X_CopyArea or X_CopyPlane. If it is
X_CopyArea, a call to XCopyArea initiated the request. If
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XGraphicsExposeEvent(3X11)XLIB FUNCTIONXGraphicsExposeEvent(3X11)
it is X_CopyPlane, a call to XCopyPlane initiated the
request. These constants are defined in <X11/Xproto.h>.
The minor_code member, like the major_code member, indi-
cates which graphics request was initiated by the client.
However, the minor_code member is not defined by the core
X protocol and will be zero in these cases, although it
may be used by an extension.
The XGraphicsExposeEvent structure has these additional
members: x, y, width, height, and count. The x and y mem-
bers are set to the coordinates relative to the drawable's
origin and indicate the upper-left corner of the rectan-
gle. The width and height members are set to the size
(extent) of the rectangle. The count member is set to the
number of GraphicsExpose events to follow. If count is
zero, no more GraphicsExpose events follow for this win-
dow. However, if count is nonzero, at least that number
of GraphicsExpose events (and possibly more) are to follow
for this window.
SEE ALSOXAnyEvent(3X11), XButtonEvent(3X11), XCreateWindow-
Event(3X11), XCirculateEvent(3X11), XCircu-
lateRequestEvent(3X11), XColormapEvent(3X11), XConfig-
ureEvent(3X11), XConfigureRequestEvent(3X11), XCopy-
Area(3X11), XCrossingEvent(3X11), XDestroyWindow-
Event(3X11), XErrorEvent(3X11), XExposeEvent(3X11), XFo-
cusChangeEvent(3X11), XGravityEvent(3X11),
XKeymapEvent(3X11), XMapEvent(3X11), XMapRe-
questEvent(3X11), XPropertyEvent(3X11), XRepar-
entEvent(3X11), XResizeRequestEvent(3X11), XSelection-
ClearEvent(3X11), XSelectionEvent(3X11), XSelectionRe-
questEvent(3X11), XUnmapEvent(3X11), XVisibili-
tyEvent(3X11)
Xlib - C Language X Interface
X Version 11 Release 6.4 2