Added an explanation of how to use events to the create-window example

[scrouthtv]

Hello,

first, I think that the default examples are very helpful and well documented.

However, if you run the create-window example and close the window, the underlying Go Program keeps running.

I think this is a good use case for the DestroyNotifyEvent and demonstrating how reading it / reading events in general works.

So I added these simple lines to the demo.

[jezek]

However, if you run the create-window example and close the window, the underlying Go Program keeps running.

How running? On Ubuntu if I close the window, i got the program terminated with output:

XGB: xgb.go:455: A read error is unrecoverable: EOF
Both event and error are nil. Exiting...

[scrouthtv]

I just tried again:

(It only ends because I manually C-c)

I am running Arch Linux with xorg-server 1.20.10-3 and xcb-proto 1.14.1-3. My WM is i3-gaps 4.19.1-1.

If I close the window, both UnmapNotify and DestroyNotify are sent, however, no error is sent (which closes the example in your case).

Sorry about the formatting.

[scrouthtv]

Here is also an example of how to listen to key

[jezek]

Now I remember. I've encountered this before. On some (well behaved) DEs the UnmapNotify and DestroyNotify is not sent just the connection is closed, unless you add WM_DELETE_WINDOW to WM_PROTOCOLS property. Could you mention this in comment in the DestoyNotifyEvent, please?

[scrouthtv]

sure thing. You're using stock ubuntu (so I can mention your DE as an example for closing = killing the X conection)?

I also have an example for drawing coming up which you can consider adding, I just have to add comments for everything.

[scrouthtv]

Here it is. I think I'm done

[scrouthtv]

I also added some text drawing in there.

[jezek]

It looks a lot better, but I have a few demands. Thank you for bearing with me and implementing my requests so far.

You're using stock ubuntu (so I can mention your DE as an example for closing = killing the X conection)?

I use Ubuntu MATE right now, but I think, stock ubuntu does the same. I have to test it, but for now let's assume it's happening on stock ubuntu too. 😆
Edit: Tested it on stock Ubuntu 20.04, no DestroyNotifyEvent, like in MATE.

[scrouthtv]

Thank you for bearing with me

No worries, I am a perfectionist myself ;)

I think it should all be in there.
Regarding the shapes example, I messed up a bit and will be opening a new PR soon (in case you're interested).

[jezek]

Just added an missing "\n" and merged. Thank you.

Also I'm interested in the shapes example. I myself like to learn from examples, so I think the more examples, the better. ;)
Hint: git rebase -i is useful to trim/modify branches.