Problems with GLFW

[Gilga]

System: Windows 8.1 (x64)
Julia: 0.4.0

when i use GLFW.PollEvents() and sleep(0.01) in a while loop it seems signals are not updated. sometimes it works and sometimes not. (this often happens when i move the glfw window. it just breaks and i get no more updates)

May its a common problem when using GLFW. Is there a workround for it?

I use signals to check a file update, it prints me a msg when i change the file.
Code:

function isUpdated(file::File, updatewhile=Reactive.Signal(true), update_interval=1.0)
    fn = filename(file)
    file_edited = foldp((false, mtime(fn)), fpswhen(updatewhile, 1.0/update_interval)) do v0, v1
        time_edited = mtime(fn)
        (!isapprox(0.0, v0[2] - time_edited), time_edited)
    end
    filter(identity, false, map(first, file_edited))
end

function watchFileUpdate(path::AbstractString, OnUpdate::Function)
    map(isUpdated(query(path))) do _unused
        println("OnUpdate: ", path)
    end
end

[SimonDanisch]

In this minimal example, you should put a preserve in there:

function watchFileUpdate(path::AbstractString, OnUpdate::Function)
    preserve(map(isUpdated(query(path))) do _unused
        println("OnUpdate: ", path)
    end)
end

Otherwise the signal might get garbage collected!

Just to understand you better, is this minimal example only broken together with GLFW?

[SimonDanisch]

If the latter is the case, how does the while loop look exactly?
If it's really just this:

while !GLFW.WindowShouldClose(window)
GLFW.PollEvents()
sleep(0.01)
end

You would need a yield() in there.

[Gilga]

Okey, it was a bit more. I still dont know whats going on. If i use GL functions in the loop it wont update. if i use non-GL functions it may work (sometimes it does and sometimes not). May something is overwritten in RAM? Its really confusing. For a moment i thought it has to do with the focus of the window when i start my program but i couldnt reproduce the problem.
i used glClear here.

while !GLFW.WindowShouldClose(window)
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) #or Dates.time() 
 GLFW.PollEvents()
 yield() # or sleep
end

[Gilga]

I dont know if this is the same problem (i dont get errors so far): #88