help with setup

[joeblew99]

seems to have a fairly strict list of depends

i decided the lsystem demo looks like the easiest to try this out.

go 1.7 on OSX

github.com/mattn/go-gtk

github.com/mattn/go-pointer

x-MacBook-Pro:lsystem apple$ go run demo.go 
# pkg-config --cflags pango
pkg-config: exec: "pkg-config": executable file not found in $PATH
# pkg-config --cflags glib-2.0 gobject-2.0
pkg-config: exec: "pkg-config": executable file not found in $PATH
x-MacBook-Pro:lsystem apple$ 

Any chance you can update either the examples readme or the main reamd for the dependencies a bit ?

This looks pretty cool btw. The text edit using the signit.ca/graphics looks pretty cool too.

[TheGrum]

Unfortunately, the textedit using sigint.ca turned out to run into the dependency conflict problem - my program imports Shiny, then imports sigint.ca, which itself has a vendored Shiny, and their mouse events are incompatible.

The code as it stands now only has a few dependencies, Shiny, go-gtk, gotk3 as of yesterday, and draw2dimg. It is Shiny and the gtk libraries that are transitively dependency heavy.

A bit of searching found this comment: https://github.com/mattn/go-gtk/issues/165

which indicates that

Install dependencies.

$ brew install cairo pixman fontconfig freetype libpng gtksourceview

Ensure they can be found by exporting the PKG_CONFIG_PATH.

$ export PKG_CONFIG_PATH=":/usr/local/opt/cairo/lib/pkgconfig:/usr/local/opt/pixman/lib/pkgconfig:/usr/local/opt/fontconfig/lib/pkgconfig:/usr/local/opt/freetype/lib/pkgconfig:/usr/local/opt/libpng/lib/pkgconfig:/usr/X11/lib/pkgconfig:/usr/local/opt/gtksourceview/lib/pkgconfig:${PKG_CONFIG_PATH}"

$ make all

may help you.

[joeblew99]

thanks for detailed help.

BTW, i got exactly the same error with sigint.ca/graphics repo and the dependency on the mouse events from Shiny. It was only about 7 lines that did not match. I tried it out 2 weeks ago. I think the author is really eager to get it fixed, but he did not know what was broken. Here is the issue: https://github.com/jnjackins/graphics/issues/2

---

About GTK

I followed the instructions you had, and it semed to work.

demo compiled with no errors

but then i run demo i got the same error:

x-MacBook-Pro:demo apple$ go build demo.go
x-MacBook-Pro:demo apple$ ls
demo    demo.go
x-MacBook-Pro:demo apple$ ./demo

(process:94539): Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.
fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x1 addr=0x6f6d65642f2e pc=0x490ce5d]

runtime stack:
runtime.throw(0x4213b91, 0x2a)
    /usr/local/go/src/runtime/panic.go:566 +0x95
runtime.sigpanic()
    /usr/local/go/src/runtime/sigpanic_unix.go:12 +0x2cc

goroutine 1 [syscall, locked to thread]:
runtime.cgocall(0x418b3c0, 0xc42004dcb8, 0x0)
    /usr/local/go/src/runtime/cgocall.go:131 +0x110 fp=0xc42004dc88 sp=0xc42004dc48
github.com/mattn/go-gtk/gtk._Cfunc_gtk_init(0xc4200741d8, 0xc420074210)
    ??:0 +0x41 fp=0xc42004dcb8 sp=0xc42004dc88
github.com/mattn/go-gtk/gtk.Init(0x43a4470)
    /Users/apple/workspace/go/src/github.com/mattn/go-gtk/gtk/gtk.go:230 +0x19e fp=0xc42004dd48 sp=0xc42004dcb8
main.main()
    /Users/apple/workspace/go/src/github.com/mattn/go-gtk/example/demo/demo.go:49 +0x42 fp=0xc42004df48 sp=0xc42004dd48
runtime.main()
    /usr/local/go/src/runtime/proc.go:183 +0x1f4 fp=0xc42004dfa0 sp=0xc42004df48
runtime.goexit()
    /usr/local/go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc42004dfa8 sp=0xc42004dfa0

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/local/go/src/runtime/asm_amd64.s:2086 +0x1

[joeblew99]

my bad.

Demo does not work, but other do. So i must have a good setup now :)

I will move on and close this..

[TheGrum]

Sorry, an inadvertent ctrl-enter sent that off before I was finished.

I do not have access to an OS-X box to test on, but if you can get go-gtk installed and happy, then building the examples should be doable, hopefully. I've run into a few git issues, so you may need to go get -u again to be sure you've got the latest build state.

Incidentally, if you find a different graphics toolkit easier to install on OSX and it is also available for Linux, I'm willing to attempt to try it and add it as a backend, though I can't make any promises about timing on that.

I do hope you have success building it.​

Btw, I have recorded a video regarding it, as requested fairly early on in the golang-nuts discussion.

https://www.youtube.com/watch?v=vG05T5LE9ZY

[joeblew99]

thanks for the video. Its quite long so will watch it later..

i got go-gtk installed and happy. at least some of their demos worked for me. But i still had issues running your code. an easy one is /examples/maze/mazegui.go

x-MacBook-Pro:maze apple$ pwd
/Users/apple/workspace/go/src/github.com/TheGrum/renderview/examples/maze
x-MacBook-Pro:maze apple$ ls
maze.go     mazegui.go
x-MacBook-Pro:maze apple$ go run mazegui.go
# command-line-arguments
./mazegui.go:40: undefined: NewDepthFirstMaze
./mazegui.go:71: undefined: Maze
./mazegui.go:94: undefined: W_NORTH
./mazegui.go:98: undefined: W_EAST
./mazegui.go:103: undefined: W_SOUTH
./mazegui.go:108: undefined: W_WEST
x-MacBook-Pro:maze apple$ 

i did not have a ton of time to go into why its not getting the params that the Main func setsup, but it does not respect.

About other GUI frameworks For a few days i have been using https://github.com/andlabs/ui Its pretty nice, and the people involved are very helpful. Have a look, and see what you think. Its 100% native on windows, osx and linux. Some people like that, some dont.

I have a project over here where i am building some best practice stuff around it. https://bitbucket.org/gedw99/md-desktopnative-x Its still early days. But example 02 is a good brute force test harness to show what it can do. i plan to add some other common UX patterns there. Its partly be testing it all out for stability. Also its a VERY easy go get, all you need is gcc. On OSX i needed nothing at all. On Windows, you just 64bit version of gcc.

Be aware, as you will find from the comments that the repo is a bit old. Maybe about 1 to 2 month because the libui repo. They are working on getting tree and table widgets done and then working in the go code. But there is a forked repo over at https://github.com/ProtonMail/ui, where it is being kept up to date, and will be merged back into the stable one.

I really really wanted to use Shiny, but alas, its not ready:)

[TheGrum]

I've been adding '// +build example' in the examples so some of them may need 'go build -tags 'example'" to build.

For the maze, because it is multiple files and the second file is not in a separate package that is imported, you would have to do go run mazegui.go maze.go or just do go build && ./maze

I'll have a look at andlabs/ui later. I had discounted it initially in favor of Shiny, and missed it when I was looking a second time for an alternative after I hit a wall with Shiny.

[joeblew99]

thanks now i understand the way your examples work. maze works for me :) Its a pretty cool pattern for quick test harness stuff.

i think i should close this now. Setup now working for me. thanks for your help.