I am using Gtk to display on a canvas images which are plots/figures produced in Plots via GR. The workflow I use is to save the figure to a png, and then load it in the draw function for Gtk where the canvas surface is then updated. This incurs a large delay and the png filesize is not large. How can I channel the figure production in plots directly to Gtk’s canvas t reduce the latency? (part of cairo.jl I assume) using Gtk function drawSys(widget) ctx = Gtk.getgc(widget) c = CairoRGBSurface(400,20); cr = CairoContext(c); set_source_rgb(cr,0.8,0.8,0.8); # light gray rectangle(cr,0.0,0.0,800.0,650.0); # background fill(cr); image = read_from_png("dog.png") set_source_surface(ctx, image, 0, 0) paint(ctx) end

gtk_ex.jl produces a zero-size window…? (v1.1) pkg> status Gtk GR Status `~/.julia/environments/v1.1/Project.toml` [9e28174c] BinDeps v0.8.10 [159f3aea] Cairo v0.5.6 [34da2185] Compat v2.1.0 [28b8d3ca] GR v0.41.0 [a2bd30eb] Graphics v0.4.0 [4c0ca9eb] Gtk v0.16.5 [d9be37ee] Homebrew v0.7.1 [189a3867] Reexport v0.2.0 [c17dfb99] WinRPM v0.4.2 julia> versioninfo() Julia Version 1.1.0 Commit 80516ca202 (2019-01-21 21:24 UTC) Platform Info: OS: Linux (x86_64-pc-linux-gnu) CPU: Intel(R) Core(TM) i7-2860QM CPU @ 2.50GHz WORD_SIZE: 64 LIBM: libopenlibm LLVM: libLLVM-6.0.1 (ORCJIT, sandybridge)

Here is a full example: using Gtk.ShortNames using Random using Winston c = Canvas() w = Window(c, "Test Winston") Gtk.showall(w) p = Winston.plot(randn(50), "b-", linewidth=7); display(c, p)

I successfully tested it using Julia 1.2, Gtk 0.6. (v1.2) pkg> st Gtk GR Status `~/.julia/environments/v1.2/Project.toml` [159f3aea] Cairo v0.6.0 [28b8d3ca] GR v0.41.3 #master (https://github.com/jheinen/GR.jl.git) [4c0ca9eb] Gtk v0.17.0 julia> versioninfo() Julia Version 1.2.0 Commit c6da87ff4b (2019-08-20 00:03 UTC) Platform Info: OS: Linux (x86_64-pc-linux-gnu) CPU: Intel(R) Core(TM) i7-8569U CPU @ 2.80GHz WORD_SIZE: 64 LIBM: libopenlibm LLVM: libLLVM-6.0.1 (ORCJIT, skylake) [11]

(v1.2) pkg> st Gtk GR Status `~/.julia/environments/v1.2/Project.toml` [159f3aea] Cairo v0.6.0 [28b8d3ca] GR v0.41.3 #master (https://github.com/jheinen/GR.jl.git) [4c0ca9eb] Gtk v0.17.0 julia> versioninfo() Julia Version 1.2.0 Commit c6da87ff4b (2019-08-20 00:03 UTC) Platform Info: OS: Linux (x86_64-pc-linux-gnu) CPU: Intel(R) Core(TM) i7-2860QM CPU @ 2.50GHz WORD_SIZE: 64 LIBM: libopenlibm LLVM: libLLVM-6.0.1 (ORCJIT, sandybridge) julia> include("/tmp/gtk_ex.jl") Still I get only this icon in the Ubuntu taskbar: [Screenshot%20from%202019-10-02%2023-49-32] I tested examples from Gtk docs and they work fine.

What’s the reason why you are using Homebrew on a Linux box?

Who, me? :slight_smile: I am not using Homebrew. Maybe you are referring to my typo taskbar → dash? Edit: good catch, it is installed automatically as a dependency, strange… [image] Pkg installs Homebrew to a Linux box as a dependency General Usage @jheinen noticed in Fastest way to draw on Gtk.jl 'canvas' with plots produced from Plots.jl? - #12 by jheinen that Homebrew is installed automatically as a dependency even if running in Linux OS. I tested this with a fresh installation (removed .julia): julia> versioninfo() Julia Version 1.2.0 Commit c6da87ff4b (2019-08-20 00:03 UTC) Platform Info: OS: Linux (x86_64-pc-linux-gnu) CPU: Intel(R) Core(TM) i7-2860QM CPU @ 2.50GHz WORD_SIZE: 64 LIBM: libopenlibm LLVM: libLLVM-6.0.1 (ORCJ…

As I mentioned in the other thread I removed .julia and reinstalled the relevant packages, still I get an empty window… But in another almost identical box it works perfectly…strange. Anyway, it seems to be a local problem here. Nice and fast demo!

I have been trying to adapt your example provided in https://github.com/jheinen/GR.jl/blob/master/examples/gtk_ex.jl, but encounter errors frequently when trying to modify the code. Eg. Trying to use the plot function within the example: function plot(ctx, w, h) global sl ENV["GKS_WSTYPE"] = "142" ENV["GKSconid"] = @sprintf("%lu", UInt64(ctx.ptr)) plt = gcf() plt[:size] = (w, h) nbins = Int64(Gtk.GAccessor.value(sl)) plot(1:10,rand(10))#hexbin(x, y, nbins=nbins) end errors: julia> FATAL ERROR: Gtk state corrupted by error thrown in a callback: ERROR: MethodError: no method matching plot(::UnitRange{Int64}, ::Array{Float64,1}) Closest candidates are: plot(::Any, ::Any, !Matched::Any) at /home/xel/tmp/try.jl:10 Stacktrace: [1] plot(::Cairo.CairoContext, ::Int32, ::Int32) at /home/xel/tmp/try.jl:19 [2] draw(::Gtk.GtkCanvas) at /home/xel/tmp/try.jl:31 [3] draw(::Gtk.GtkCanvas, ::Bool) at /home/xel/.julia/packages/Gtk/aP55V/src/cairo.jl:90 [4] notify_resize(::Ptr{GObject}, ::Ptr{Gtk.GdkRectangle}, ::Gtk.GtkCanvas) at /home/xel/.julia/packages/Gtk/aP55V/src/cairo.jl:67 [5] (::getfield(Gtk, Symbol("##237#238")))() at /home/xel/.julia/packages/Gtk/aP55V/src/events.jl:2 [6] g_sigatom(::Any) at /home/xel/.julia/packages/Gtk/aP55V/src/GLib/signals.jl:167 [7] gtk_main() at /home/xel/.julia/packages/Gtk/aP55V/src/events.jl:1 Killed this works with GR at the REPL where a GR window open up and shows the plot. Is there a problem with my system set up maybe?

Does this mean that the unmodified (using hexbin) code works?

yes, the default example does work

Fastest way to draw on Gtk.jl 'canvas' with plots produced from Plots.jl?

General Usage

KajWiik October 2, 2019, 10:11pm 13

Who, me?

I am not using Homebrew. Maybe you are referring to my typo taskbar → dash?

Edit: good catch, it is installed automatically as a dependency, strange…

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Fastest way to draw on Gtk.jl 'canvas' with plots produced from Plots.jl?

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