TLDR: See https://github.com/gioui/gio-x/pull/26, that allows to select a folder, but I don't 
have time to properly implement it. "It works on my machine", and it's very limited.

Hi,

I'm the original creator of `gio-x/explorer`. The purpose of this
package was to enable saving and downloading invoices and user data
(meet GDPR requirements). That’s why features like selecting
multiple files or folders weren’t supported. Currently, I keep sharing
some code on my Gio-Plugins repository.

Explorer uses `ACTION_GET_CONTENT` [0] instead of `ACTION_OPEN_DOCUMENT`
[1]. It behaves like JavaScript, returning a copy of the file to read, which is 
why directories don’t work. It's a simple read/write, similar to how JS works. The latter is more

Can you try use the `DataDir` (https://pkg.go.dev/gioui.org@v0.7.1/app#DataDir) folder, that is exclusive for your app and you can use it.

If you want to read/write outside of the app sandbox you need permission, but the permission need to be performed by the user explicitly, see https://git.sr.ht/~whereswaldon/gio-x/tree/v0.7.1/item/explorer/explorer_android.java#L149-159

-- 
  Lucas Rodrigues
  inkeliz@inkeliz.com

On Fri, Jan 10, 2025, at 12:34 AM, Otfried Geffert wrote:
> Dear Elias and all others,
>
> my attempt to create a directory with os.Mkdir("xxx", os.ModePerm) 
> failed with the message
> mkdir xxx: read-only file system

Hi,

I have currently migrated almost everything to the latest version, but 
ConfigEvent.Focused doesn't work.

I reported some issues about this on gio-todo. However, the issue affects multiple 
OSes (from WASM to iOS) on different levels.

I can summarize all issues:

1. Focused is not triggered when the page is not visible (WASM). It happens before,
using visibilitychange.

2. Focused is triggered incorrectly if another view in the same window has focus,

I notice that yesterday, while woking on my year-long PR [0]. Seems that exists two 
`scratchFilters`, one of them is on the "root" and another inside "Key" sub-struct.

The "key sub-struct" only appends, but never resets or it's used. I silent remove it [1],
I'm not aware of any side-effect. Try to remove this append line and check if stuff
still running.


[0] https://github.com/gioui/gio/pull/117/commits/e6f6b3d76e61f314ece1755dd3ce6785dc9af9c1
[1] https://github.com/gioui/gio/pull/117/commits/e6f6b3d76e61f314ece1755dd3ce6785dc9af9c1#diff-c04c544d7677b4f40b53717995fb8f2e3d67212768e651e229ef2c020fc0d357L306-L308

-- 
  Lucas Rodrigues
  inkeliz@inkeliz.com

The "safe" maximum OpenJDK is 8 (with some luck: 11), IIRC. Gio uses D8 tool [0], 
which is stuck on Java 8. Gio also uses JDK8 on CI [1], so it's the recommended
version.

[0]: https://developer.android.com/tools/d8
[1]: https://github.com/gioui/gio/blob/main/.builds/linux.yml#L70-L72
-- 
  Lucas Rodrigues
  inkeliz@inkeliz.com

On Fri, May 10, 2024, at 5:23 PM, Sean E. Russell wrote:
> Well, for anyone else encountering issues and finding this thread: I downgraded
> to Java 17 and `-buildmode exe` works. Haven't tried running it yet, but the
> build works. So the maximum compatible Java version is [17,22)

Hi,

The gioui-plugins are not officially supported by the Gio maintainers, it's not
part of Gio project "umbrella". The gioui-plguins is (poorly) maintained by me, 
independently, and it's just one open-sourced version of some components 
used in a closed-source app.

These plugins are used in a specific commercial application that is not 
open-source. So, all features have been developed and only exists to meet
the needs of this application. Our app uses a fixed-oriented
(which is also a feature that I introduced to Gio, see the commit at 
https://github.com/gioui/gio/commit/d51d8b4). I suggest to open one issue in 
the GitHub repository, then I can better track that issue. Note, that this 
project also current lacks tests (CI), which makes things harder to proper

I haven't upgraded to version 0.5 or 0.6 yet. I'm still on 0.1-ish. I'm hope to migrate 
to 0.6 by June.

In the meantime, I use system.StageEvent for:

- Turning off Gio animations and components (like webview) when not visible.
- Implementing workarounds for Safari, due to limitations with onClick.
- Automatically filling in the sign-up confirmation code. If the user minizes the app 
on "Enter Code" page and then returns, it will read the code from the clipboard 
and check it in automatically (if it's a valid format).

As I said, I didn't move to 0.6, so I'm not sure if any of my use-case is affected.

--

Typically, mobile keyboards close when you click 'outside', 
but Gio does not handle this automatically. You can create a 
new clip.Rect and listen for clicksqtouches. Then, use 
op.SoftKeyboardOp{Show: false}.Add(...) to close the keyboard.

-- 
  Lucas Rodrigues
  inkeliz@inkeliz.com

On Sun, Jan 14, 2024, at 6:30 AM, kennedy@dreacotgroup.com wrote:
> The editor doesn't seem to support disappearing keyboard on mobile, so 
> when we focus on the Editor, the keyboard shows and there is no way to 
> hide it

Not directly related, but one PR(https://github.com/gioui/gio/pull/117/files) uses 
WM_COPYDATA to handle "deeplinking" on Windows. (Previously, the original
PR used "named-mmap").

-- 
  Lucas Rodrigues
  inkeliz@inkeliz.com

On Thu, Nov 30, 2023, at 8:58 AM, Egon Elbre wrote:
> Btw. It's possible to pipes for IPC, which is also more cross-platform
> and doesn't require integrating with the windowing framework.
>
> Also, there are other approaches
> https://learn.microsoft.com/en-us/windows/win32/ipc/interprocess-communications

Well... Safari doesn't support `showSaveFilePicker`, 
https://caniuse.com/?search=showSaveFilePicker.

Sounds like Safari only supports "Origin Private File System", which
is a subset of File System Access API. That API only allows the
website/origin to store contents, without user interaction

You can read more about that on https://developer.chrome.com/articles/origin-private-file-system/#the-user-visible-versus-the-origin-private-file-system. In general, that is a 
"file-based" version of Localstorage, you can access and
read files that is exclusive to the origin/website, and not
intended to be visible directly by the user. That is not
useful to explorer package.

_I'm assuming that "Can I Use" is correct, I didn't test that._