Color wheel: Difference between revisions
julia example
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Image is same as Kotlin entry
</pre>
=={{header|Julia}}==
<lang julia>using Gtk, Graphics, Colors
const win = GtkWindow("Color Wheel", 300, 300) |> (const can = @GtkCanvas())
set_gtk_property!(can, :expand, true)
@guarded draw(can) do widget
ctx = getgc(can)
h = height(can)
w = width(can)
center = (x = w / 2, y = h / 2)
anglestep = 1/w
for θ in 0:1:360
rgb = RGB(HSV(θ, 1, 1))
set_source_rgb(ctx, rgb.r, rgb.g, rgb.b)
line_to(ctx, center...)
arc(ctx, center.x, center.y, w/2.2, 2 * pi * θ / 360, anglestep)
line_to(ctx, center...)
stroke(ctx)
end
end
show(can)
const condition = Condition()
endit(w) = notify(condition)
signal_connect(endit, win, :destroy)
wait(condition)
</lang>
=={{header|Kotlin}}==
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