I have a peculiar problem (aren't they all?). A new program that uses X11 fails to get any ButtonRelease event reported to it after the XNextEvent call. That is, mouse clicks don't work. The program gets others, such as exposure and keyboard events, but not button press or release. Other programs running on the same hardware obviously do get all mouse clicks. Compounding the problem, this failure occurs under Ubuntu and Mint, but all events are reported under Raspbian -- that is, under Raspbian the failure does not occur.
This is the setup instruction:
Code:
i = XSelectInput(dpy,win, ExposureMask | KeyPressMask |
ButtonReleaseMask | KeyReleaseMask);
After issuance i contains 1.
I've read (seemingly relevant parts of) the X11 manual without gaining a clue. I'm hoping that someone else has experienced this problem and found the cause.
Would this question be more appropriate in another group? Which one?
--rLsj
Moderator's Comments:
Please use CODE tags when displaying sample input, sample output, and code segments.
Last edited by Don Cragun; 01-14-2017 at 06:00 PM..
Reason: Add CODE and ICODE tags.
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LEARN ABOUT OSF1
maze
maze(1X)maze(1X)NAME
maze - an automated X11 demo repeatedly creating and solving a random maze
SYNOPSIS
maze [-S] [-r] [-g geometry] [-d display]
OPTIONS
Full screen window option... Reverse video option... Specifies the window geometry to be used... Specifies the display to be used...
The following lists the current functionality of various mouse button clicks; Clears the window and restarts maze... Toggles the maze pro-
gram, first click -> stop, second click -> continue... Kills maze...
DESCRIPTION
The maze program creates a "random" maze and then solves it with graphical feedback.
LIMITATIONS
No color support...
Expose events force a restart of maze...
Currently, mouse actions are based on "raw" values [ Button1, Button2 and Button3 ] from the ButtonPress event...
[ does not use pointer mapping ]
COPYRIGHT
Copyright 1988 by Sun Microsystems, Inc. Mountain View, CA.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, pro-
vided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in sup-
porting documentation, and that Sun not be used in advertising or publicity pertaining to distribution of the software without specific
prior written permission. Sun makes no representations about the suitability of this software for any purpose. It is provided "as is" with-
out any express or implied warranty.
SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. IN NO EVENT SHALL SUN BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
USE OR PERFORMANCE OF THIS SOFTWARE.
AUTHOR(S)
Richard Hess [ X11 extensions ] {...}!uunet!cimshop!rhess
Consilium, Mountain View, CA
Dave Lemke [ X11 version ] lemke@sun.COM
Sun MicroSystems, Mountain View, CA
Martin Weiss [ SunView version ]
Sun MicroSystems, Mountain View, CA
maze(1X)
01-14-2017
