QuartzGetWindow.jl

Description

• This repository QuartzGetWindow.jl gives a julia package for obtaining GUI information for macOS users.

  • For example we can use getActiveWindowName() function to get the name of currently active window. The result should be same as pygetwindow.getActiveWindow
  • We also provide getWindowGeometry(title) function to get a window position and size with a given title. The result should be same as pygetwindow.getWindowGeometry

• Note that our pacakge QuartzGetWindow.jl uses CoreGraphics library on macOS. This approach is similar to QuartzImageIO.jl.

Application

You can record an active window during the calculation.

using Dates
using QuartzGetWindow

struct ScreenRecorder
    procref::Ref{Base.Process}
end

function ScreenRecorder(proc::Base.Process)
    ScreenRecorder(Ref(proc))
end

function start(::Type{ScreenRecorder})
    n = getActiveWindowName()
    @debug n
    x, y, w, h = getWindowGeometry(n)
    file = "$(Dates.now()).mov"

    inp = Base.PipeEndpoint()
    out = Base.PipeEndpoint()
    err = Base.PipeEndpoint()
    # Run `screencapture` command
    cmd = `screencapture -R$(x),$(y),$(w),$(h) -v $(file)`
    proc = Base.run(cmd, inp, out, err, wait = false)
    recorder = ScreenRecorder(proc)
    return recorder
end

function quit(recorder::ScreenRecorder)
    # press q key
    write(recorder.procref[], "q")
end

function main()
    @debug "Start recording..."
    sleep(1.0)
    recorder = start(ScreenRecorder)
    # Do something
    sleep(1.0)
    println("Count down")
    for i = 5:-1:1
        println("i=$(i)")
        sleep(0.5)
    end
    println("🚀")
    # Stop `screencapture` process
    quit(recorder)
    @debug "Quit"
    exit()
end

main()

You will get the following result:

2024-12-18T16.27.00.633.mov

Known issue

Somethimes, getActiveWindowName() gets an unexpected result on Apple M-series. Restarting your macOS device may solve this issue, but I can't figure out why it happens.