XGraphicsExposeEvent(3)

1XGraphicsExposeEvent(3)         XLIB FUNCTIONS         XGraphicsExposeEvent(3)
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NAME

6       XGraphicsExposeEvent,  XNoExposeEvent  -  GraphicsExpose  and  NoExpose
7       event structures
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STRUCTURES

10       The structures for GraphicsExpose and NoExpose events contain:
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12       typedef struct {
13               int type;       /* GraphicsExpose */
14               unsigned long serial;   /* # of last request processed by server */
15               Bool send_event;        /* true if this came from a SendEvent request */
16               Display *display;       /* Display the event was read from */
17               Drawable drawable;
18               int x, y;
19               int width, height;
20               int count;      /* if nonzero, at least this many more */
21               int major_code; /* core is CopyArea or CopyPlane */
22               int minor_code; /* not defined in the core */
23       } XGraphicsExposeEvent;
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25       typedef struct {
26               int type;       /* NoExpose */
27               unsigned long serial;   /* # of last request processed by server */
28               Bool send_event;        /* true if this came from a SendEvent request */
29               Display *display;       /* Display the event was read from */
30               Drawable drawable;
31               int major_code; /* core is CopyArea or CopyPlane */
32               int minor_code; /* not defined in the core */
33       } XNoExposeEvent;
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35       When you receive these events, their structure members are set as  fol‐
36       lows.
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38       The  type  member  is set to the event type constant name that uniquely
39       identifies it.  For example, when the X server reports a GraphicsExpose
40       event  to a client application, it sends an XGraphicsExposeEvent struc‐
41       ture with the type member set to GraphicsExpose.  The display member is
42       set  to a pointer to the display the event was read on.  The send_event
43       member is set to True if the  event  came  from  a  SendEvent  protocol
44       request.   The  serial member is set from the serial number reported in
45       the protocol but expanded from the 16-bit least-significant bits  to  a
46       full 32-bit value.  The window member is set to the window that is most
47       useful to toolkit dispatchers.
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49       Both structures have these common members:  drawable,  major_code,  and
50       minor_code.  The drawable member is set to the drawable of the destina‐
51       tion region on which the graphics request was  to  be  performed.   The
52       major_code  member  is  set  to  the  graphics request initiated by the
53       client and can be either X_CopyArea or X_CopyPlane.  If it  is  X_Copy‐
54       Area, a call to XCopyArea initiated the request.  If it is X_CopyPlane,
55       a call to  XCopyPlane  initiated  the  request.   These  constants  are
56       defined in The minor_code member, like the major_code member, indicates
57       which graphics request was  initiated  by  the  client.   However,  the
58       minor_code  member  is  not  defined by the core X protocol and will be
59       zero in these cases, although it may be used by an extension.
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61       The XGraphicsExposeEvent structure has these additional members: x,  y,
62       width,  height,  and count.  The x and y members are set to the coordi‐
63       nates relative to the drawable's origin  and  indicate  the  upper-left
64       corner  of  the rectangle.  The width and height members are set to the
65       size (extent) of the rectangle.  The count member is set to the  number
66       of GraphicsExpose events to follow.  If count is zero, no more Graphic‐
67       sExpose events follow for this window.  However, if count  is  nonzero,
68       at  least  that number of GraphicsExpose events (and possibly more) are
69       to follow for this window.
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NAME

STRUCTURES

SEE ALSO