1XExposeEvent(3)                 XLIB FUNCTIONS                 XExposeEvent(3)
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NAME

6       XExposeEvent - Expose event structure
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STRUCTURES

9       The structure for Expose events contains:
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11       typedef struct {
12               int type;       /* Expose */
13               unsigned long serial;   /* # of last request processed by server */
14               Bool send_event;        /* true if this came from a SendEvent request */
15               Display *display;       /* Display the event was read from */
16               Window window;
17               int x, y;
18               int width, height;
19               int count;      /* if nonzero, at least this many more */
20       } XExposeEvent;
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22       When you receive this event, the structure members are set as follows.
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24       The  type  member  is set to the event type constant name that uniquely
25       identifies it.  For example, when the X server reports a GraphicsExpose
26       event  to a client application, it sends an XGraphicsExposeEvent struc‐
27       ture with the type member set to GraphicsExpose.  The display member is
28       set  to a pointer to the display the event was read on.  The send_event
29       member is set to True if the event came from a SendEvent  protocol  re‐
30       quest.  The serial member is set from the serial number reported in the
31       protocol but expanded from the 16-bit least-significant bits to a  full
32       32-bit value.  The window member is set to the window that is most use‐
33       ful to toolkit dispatchers.
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35       The window member is set to the exposed (damaged) window.  The x and  y
36       members  are set to the coordinates relative to the window's origin and
37       indicate the upper-left corner of the rectangle.  The width and  height
38       members  are set to the size (extent) of the rectangle.  The count mem‐
39       ber is set to the number of Expose events that are to follow.  If count
40       is  zero,  no  more  Expose events follow for this window.  However, if
41       count is nonzero, at least that number of Expose events  (and  possibly
42       more)  follow for this window.  Simple applications that do not want to
43       optimize redisplay by distinguishing between subareas of its window can
44       just  ignore all Expose events with nonzero counts and perform full re‐
45       displays on events with zero counts.
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SEE ALSO

48       XAnyEvent(3),   XButtonEvent(3),    XCreateWindowEvent(3),    XCircula‐
49       teEvent(3),   XCirculateRequestEvent(3),   XColormapEvent(3),  XConfig‐
50       ureEvent(3), XConfigureRequestEvent(3), XCrossingEvent(3), XDestroyWin‐
51       dowEvent(3),    XErrorEvent(3),    XFocusChangeEvent(3),   XGraphicsEx‐
52       poseEvent(3), XGravityEvent(3), XKeymapEvent(3), XMapEvent(3),  XMapRe‐
53       questEvent(3),     XPropertyEvent(3),     XReparentEvent(3),    XResiz‐
54       eRequestEvent(3), XSelectionClearEvent(3), XSelectionEvent(3),  XSelec‐
55       tionRequestEvent(3), XUnmapEvent(3), XVisibilityEvent(3)
56       Xlib - C Language X Interface
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60X Version 11                     libX11 1.7.2                  XExposeEvent(3)
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