StackOverflow2013

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plurals

PO
primarykey
Id
11354589
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-07-06T01:00:54.490
FavoriteCount
0
LastActivityDate
2012-07-06T01:00:54.490
LastEditDate
LastEditorUserId
0
OwnerUserId
705115
ParentId
11336596
PostTypeId
2
Score
4
ViewCount
0
LastEditorDisplayName
text
Body
Most xlib functions always return 1 and you should <a href="http://tronche.com/gui/x/xlib/event-handling/protocol-errors/default-handlers.html" rel="nofollow">use error handlers</a> to check for errors. See <a href="https://gist.github.com/3057356" rel="nofollow">XChangeProperty implementation</a> - note <code>return 1</code> at the end. Your code works just fine: <pre><code>#include <stdio.h> #include <stdlib.h> #include <X11/Xlib.h> #include <X11/Xutil.h> #include <X11/Xos.h> #include <X11/Xatom.h> #include <X11/keysym.h> static void change_prop(Display *display, Window window) { unsigned char some_text[40] = "hello world!"; int retval; Atom my_atom; my_atom = XInternAtom(display, "PERSONAL_PROPERTY", False); if (my_atom == None) { printf("### failed to create atom with name PERSONAL_PROPERTY\n"); return; } retval = XChangeProperty(display, /* connection to x server */ window, /* window whose property we want to change */ my_atom, /* property name */ XA_STRING, /* type of property */ 8, /* format of prop; can be 8, 16, 32 */ PropModeReplace, some_text, /* actual data */ 10 /* number of elements */ ); printf("###### XChangeProperty() reted %d\n", retval); } int main() { Display *dis; Window win; dis = XOpenDisplay(NULL); win = XCreateSimpleWindow(dis, RootWindow(dis, 0), 1, 1, 500, 500, \ 0, BlackPixel (dis, 0), BlackPixel(dis, 0)); XMapWindow(dis, win); printf("window %i\n", (int)win); change_prop(dis, win); XFlush(dis); sleep(50); return(0); } </code></pre> result: <pre><code>09:48 tmp $ g++ prop.cpp /usr/X11/lib/libX11.dylib 09:48 tmp $ ./a.out window 6291457 ###### XChangeProperty() reted 1 </code></pre> <a href="http://www.xfree86.org/current/xprop.1.html" rel="nofollow">xprop</a> result: <pre><code>09:48 tmp $ xprop -id 6291457 WM_STATE(WM_STATE): window state: Normal icon window: 0x0 _NET_WM_STATE(ATOM) = _NET_WM_ALLOWED_ACTIONS(ATOM) = _NET_WM_ACTION_MOVE, _NET_WM_ACTION_RESIZE, _NET_WM_ACTION_MINIMIZE, _NET_WM_ACTION_MAXIMIZE_HORZ, _NET_WM_ACTION_MAXIMIZE_VERT, _NET_WM_ACTION_FULLSCREEN, _NET_WM_ACTION_CLOSE PERSONAL_PROPERTY(STRING) = "hello worl" </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POXChangeProperty() always fails
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USAndrey Sidorov
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POXChangeProperty() always fails
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
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 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
CommentsPostId
1. This table or related slice is empty.

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