Raspberry Pi Forums

tito-t

is there a way to erase a region correctly (as fast as possible) ?

tito-t

it was just meant as a friendly and constructive feedback from a user. as you did even say by yourself: "all there if you can be bothered to look - which sadly, judging by the email I get, it seems most (!) people can't ." Of course I won't tell you what you have to do, but if if you provide things ...

tito-t

ok, thanks for your advice!

tito-t

after uninstall, /usr/include/X11 is still there...
and in /lib there are 2 libxtables*.so files...

so remove manually then ?

tito-t

all there if you can be bothered to look - which sadly, judging by the email I get, it seems most people can't. on https://projects.drogon.net/raspberry-pi/wiringpi/lcd-library/ I have looked but there is no example code to find, just some vague or questionable codes of users posted in the discussi...

tito-t

where on your website can this source file be read, too? IMO everyone who is searching for a lib or an example is supposed to search on a website or in a repository first, probably using Google, pls CMMIIW! additionally , on a website you can provide wiring charts (e.g., Fritzing), and one can see h...

tito-t

any directories left then afterwards to be removed manually...?

tito-t

thank you!
do I have to do that from /home/pi/ directory or from a different other one?

tito-t

so as there finally is no need to keep Xlib on my system any more -

how can I uninstall it?

tito-t

Thlorian wrote:Ahhhh so everything is done via command line (old school DOS)! .

yes, sort of "vintage-style"

tito-t

I see, not a simple task to do. I came to that openVG plus mouse idea when I read about a GUI IDE for window-frame-and-form-based programs (OP by Stiller) like one can construct it by C++ MS-Windows visual programming IDEs, just by "painting" or "drawing" a program interface (like Visual C++ or C++ ...

tito-t

Yes but X11 knows nothing about the OpenVG window. As soon as you press a mouse button whatever X11 window happens to be underneath the cursor at that time will suddenly get focus and X will think you are interacting with that and send events to it. You could easily end up doing something unintenti...

tito-t

another good example about what beginners would wish to know about C/C++ programming for the Pi: https://www.raspberrypi.org/forums/viewtopic.php?f=33&t=164189 As you may may observe, many Raspi newbies are already a little experienced in C/C++ for Arduino (i.e., at least with the very C/C++ basics)...

tito-t

Gordon's tutorial on his wiringPi website: https://projects.drogon.net/raspberry-pi/wiringpi/lcd-library/ (unfortunately Gordon does not provide really functioning complete source code examples on his website) There are plenty functioning complete source code examples on my sites - and I reply to m...

tito-t

it's actually not about a window but about the entire desktop position, i.e. the whole (1080p or 720p) HDMI sreen.
I want to use the mouse functionality with openVG.

tito-t

thank you, that sounds promising, but could you please provide a functioning code which I could use from a proprietary C or C++ program?
For testing purpose, that program perhaps just might print a string to stdout repeatedly saying:
mouseX=..., mouseY=..., mouseBtnEvent=...

tito-t

Well at a guess /dev/input/event4 doesn't exist since that error is printed only when MOUSEFILE doesn't exist. that would have been also my educated guess ;) You need to provide the proper file that corresponds to the mouse input stream and that is entirely dependant on what you've got plugged in t...

tito-t

ps,
now it runs,
but immediatley terminates with the
error message:

opening device: No such file or directory

------------------
(program exited with code: 1)

tito-t

no, of course I did not install Xlib,
That was exactly what my question actually was about (I simply didn't know how to perform that)

and what about addional libs you once mentioned?

tito-t

I just can assume that it's originally a shield provided for Arduino (e.g., Adafruit), randomly taken from the avaiable Fritzing tools, but usually that does not matter when taking them for the PI as well provided that it's a HD44780 type (what most probably will be true).

tito-t

unfortunately not for me, Compiler error: unbenannt.c:10:22: fatal error: X11/Xlib.h: Datei oder Verzeichnis nicht gefunden so my question was actually about how to install all of those Xlib things correctly ;) about gcc I can't tell you, I use the standard setup of Jessie os-release (cat /etc/os-re...

tito-t

I already tried this code, but it does not compile - what and how do I have to do to install all and everything correctly? // ref.: // http://stackoverflow.com/questions/11519759/how-to-read-low-level-mouse-click-position-in-linux #include <linux/input.h> #include <fcntl.h> #include <X11/Xlib.h> #de...

tito-t

did I miss something?
Is this what he posted not wired for the Pi?
https://thebbblogdotcom.files.wordpress ... -raspi.png

tito-t

that's really awesome...

But I was actually curious which code the OP had taken to make his thing work...

tito-t

hello again, about openVG: how to quickly clear an area to Background color? (e.g., if a text line has to be erased smilar to "ClearEndOfLine", or a graph, a picture, or a shape has to be erased in an area ) Is there a quicker way other than painting a rectangle over the related area which is actual...

Search found 298 matches

Re: openVG: how to quickly clear an area to Background colo

Re: Raspberry Pi3 + LCD keypad shield v1.0 + wiringPi

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Raspberry Pi3 + LCD keypad shield v1.0 + wiringPi

Re: Raspberry Pi3 + LCD keypad shield v1.0 + wiringPi

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Power supply for Hub?

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: The MagPi does C :-)

Re: Raspberry Pi3 + LCD keypad shield v1.0 + wiringPi

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Xlib for Jessie for GUI desktop (or a better alternative

Re: Xlib for Jessie for GUI desktop?

Re: Xlib for Jessie for GUI desktop?

Re: Xlib for Jessie for GUI desktop?

Re: Raspberry Pi3 + LCD keypad shield v1.0 + wiringPi

Re: Xlib for Jessie for GUI desktop?

Re: Xlib for Jessie for GUI desktop?

Re: Raspberry Pi3 + LCD keypad shield v1.0 + wiringPi

Re: Raspberry Pi3 + LCD keypad shield v1.0 + wiringPi

openVG: how to quickly clear an area to Background color?