Hello colleague,
On Friday, April 15, 2016 at 4:00:34 PM UTC+2, Christoph Ortner wrote:
>
>
> I am trying to use Compose.jl directly instead of going through a plotting
> package. From iPython notebooks invoking compose will immediately create
> the output.
>
> But when I am in the REPL, how do I plot to a window, similar as in PyPlot?
>
the following works on my REPL with Gtk, and Compose (incl. Cairo):
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julia> using Gtk
julia> c = Gtk.@GtkCanvas(400,300);
julia> w = Gtk.@GtkWindow(c,"data win");
julia> show(c);
julia> using Compose
WARNING: using Compose.w in module Main conflicts with an existing
identifier.
julia> function sierpinski(n)
if n == 0
compose(context(), polygon([(1,1), (0,1), (1/2, 0)]))
else
t = sierpinski(n - 1)
compose(context(),
(context(1/4, 0, 1/2, 1/2), t),
(context( 0, 1/2, 1/2, 1/2), t),
(context(1/2, 1/2, 1/2, 1/2), t))
end
end
sierpinski (generic function with 1 method)
julia> co = sierpinski(3);
julia> Gtk.draw(c) do widget
Compose.draw(CAIROSURFACE(c.back),co)
end
julia> co = sierpinski(5);
julia> co = sierpinski(2);
julia> Gtk.draw(c)
- I use GtkCanvas and a Window around it.
- Then the sierpinski demo from the Compose Readme, with the Compose
context as output.
- Then i connect Gtk.draw function for c (=GtkCanvas) with the
Compose.draw function drawing to CAIROSURFACE as backend and use the c.back
- which is something like a Cairo surface (actually it's a pointer to a
Cairo context, but the surface can be reconstructed with that).
- The drawing (co) is redrawn everytime there is an expose signal from
the window to the canvas, usually when you resize or map the window. You
can call Gtk.draw(c) manually if you updated the co.
Should work with standard Gtk and Compose (please report if not, i might
need some PR then).
