NAME
XGraphicsExposeEvent, XNoExposeEvent - GraphicsExpose and NoExpose
event structures
STRUCTURES
The structures for GraphicsExpose and NoExpose events contain:
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 application, 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 graphics 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 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, indicates 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 members are set to the
coordinates relative to the drawable’s origin and indicate the upper-
left corner of the rectangle. 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 window. However, if count is
nonzero, at least that number of GraphicsExpose events (and possibly
more) are to follow for this window.
SEE ALSO
XAnyEvent(3), XButtonEvent(3), XCreateWindowEvent(3),
XCirculateEvent(3), XCirculateRequestEvent(3), XColormapEvent(3),
XConfigureEvent(3), XConfigureRequestEvent(3), XCopyArea(3),
XCrossingEvent(3), XDestroyWindowEvent(3), XErrorEvent(3),
XExposeEvent(3), XFocusChangeEvent(3), XGravityEvent(3),
XKeymapEvent(3), XMapEvent(3), XMapRequestEvent(3), XPropertyEvent(3),
XReparentEvent(3), XResizeRequestEvent(3), XSelectionClearEvent(3),
XSelectionEvent(3), XSelectionRequestEvent(3), XUnmapEvent(3),
XVisibilityEvent(3)
Xlib - C Language X Interface