many tanks for this - that looks perfect. unfortunately my Gtk installation seems broken, so it will be a while until I can try this out.
Christoph On Friday, 15 April 2016 15:42:45 UTC+1, Andreas Lobinger wrote: > > 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): > > _ > _ _ _(_)_ | A fresh approach to technical computing > (_) | (_) (_) | Documentation: http://docs.julialang.org > _ _ _| |_ __ _ | Type "?help" for help. > | | | | | | |/ _` | | > | | |_| | | | (_| | | Version 0.4.4-pre+218 (2016-01-29 21:53 UTC) > _/ |\__'_|_|_|\__'_| | Commit 386d77b* (76 days old release-0.4) > |__/ | x86_64-linux-gnu > > 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). > > >
