tiny fixes for VTE

examples/gtk3/makeAll

@@ -21,4 +21,4 @@ nim c overlay_tree1.nim
 nim c simpledrawingarea.nim
 nim c sourceview_test.nim
 nim c t0.nim
-
+nim c vte.nim

examples/gtk3/makeAllArc

@@ -21,4 +21,4 @@ nim c --gc:arc overlay_tree1.nim
 nim c --gc:arc simpledrawingarea.nim
 nim c --gc:arc sourceview_test.nim
 nim c --gc:arc t0.nim
-
+nim c --gc:arc vte.nim

examples/gtk3/vte.nim

@@ -0,0 +1,21 @@
+# https://vincent.bernat.im/en/blog/2017-write-own-terminal
+import gintro/[gtk, glib, gobject, gio, vte]
+
+proc appActivate(app: Application) =
+  let window = newApplicationWindow(app)
+  window.title = "GTK3 & Nim"
+  window.defaultSize = (600, 200)
+  let terminal = newTerminal()
+  let environ = getEnviron()
+  let command = environ.environGetenv("SHELL")
+  var pid = 0
+  echo terminal.spawnSync({}, nil, [command], [], {SpawnFlag.leaveDescriptorsOpen}, nil, nil, pid, nil)
+  window.add(terminal)
+  showAll(window)
+
+proc main =
+  let app = newApplication("org.gtk.example")
+  connect(app, "activate", appActivate)
+  discard run(app)
+
+main()