closes JuliaGraphs#95 (add saveplot)

also uses Reexport to export Measures

Author: hdavid16

Project.toml

@@ -10,12 +10,16 @@ Compose = "a81c6b42-2e10-5240-aca2-a61377ecd94b"
 DelimitedFiles = "8bb1440f-4735-579b-a4ab-409b98df4dab"
 Graphs = "86223c79-3864-5bf0-83f7-82e725a168b6"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+Measures = "442fdcdd-2543-5da2-b0f3-8c86c306513e"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 
 [compat]
 ArnoldiMethod = "0.2"
 Colors = "0.12"
 Compose = "0.9"
 Graphs = "1.4"
+Measures = "0.3"
+Reexport = "1.2"
 julia = "1.6"

README.md

@@ -146,6 +146,8 @@ draw(PDF("karate.pdf", 16cm, 16cm), gplot(g))
 draw(PNG("karate.png", 16cm, 16cm), gplot(g))
 # save to svg
 draw(SVG("karate.svg", 16cm, 16cm), gplot(g))
+# alternate way of saving to svg without loading Compose
+saveplot(gplot(g, plot_size = (16cm, 16cm)), "karate.svg")
 ```
 # Graphs.jl integration
 ```julia

src/GraphPlot.jl

@@ -2,6 +2,8 @@ module GraphPlot
 
 using Compose  # for plotting features
 using Graphs
+using Reexport
+@reexport using Measures
 
 const gadflyjs = joinpath(dirname(Base.source_path()), "gadfly.js")
 
@@ -15,7 +17,8 @@ export
     spring_layout,
     spectral_layout,
     shell_layout,
-    stressmajorize_layout
+    stressmajorize_layout,
+    saveplot
 
 include("deprecations.jl")
 

src/plot.jl

@@ -333,3 +333,8 @@ function gplothtml(args...; keyargs...)
     close(output)
     open_file(filename)
 end
+
+function saveplot(gplot::Compose.Context, filename::String)
+    draw(SVG(filename), gplot)
+    return nothing    
+end