XGraphicsExposeEvent(3)

1XGraphicsExposeEvent(3)         XLIB FUNCTIONS         XGraphicsExposeEvent(3)
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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:
11
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;
24
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;
34
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 <X11/Xproto.h>.  The minor_code member, like the major_code
57       member, indicates which graphics request was initiated by the client.
58       However, the minor_code member is not defined by the core X protocol
59       and will be zero in these cases, although it may be used by an exten‐
60       sion.
61
62       The XGraphicsExposeEvent structure has these additional members: x, y,
63       width, height, and count.  The x and y members are set to the coordi‐
64       nates relative to the drawable's origin and indicate the upper-left
65       corner of the rectangle.  The width and height members are set to the
66       size (extent) of the rectangle.  The count member is set to the number
67       of GraphicsExpose events to follow.  If count is zero, no more Graphic‐
68       sExpose events follow for this window.  However, if count is nonzero,
69       at least that number of GraphicsExpose events (and possibly more) are
70       to follow for this window.
71

NAME

STRUCTURES

SEE ALSO