[Tool] Added a front-end GUI toolkit

Fixed issue #878.

This commit is to provide a front-end GUI application to connect
tools such as tracing, debugging, profiling packages.

After doing a packaging work of back-end applications, the each menu
is going to be interconnected each other.

**Changes proposed in this PR:**
1. Added front-end GUI application

Signed-off-by: Geunsik Lim <geunsik.lim@samsung.com>

diff --git a/tools/nnstreamer-toolkit.py b/tools/nnstreamer-toolkit.py
new file mode 100755 (executable)
index 0000000..be9a875
--- /dev/null
+++ b/tools/nnstreamer-toolkit.py
@@ -0,0 +1,189 @@
+#!/usr/bin/env python
+
+##
+# NNStreamer Toolkit
+# Copyright (C) 2018 Samsung Electronics
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Library General Public
+# License as published by the Free Software Foundation; either
+# version 2 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Library General Public License for more details.
+
+##
+# @file   nnstreamer-toolkit.py
+# @brief  A front-end GUI toolkit for tracing, debugging, and profiling NNStreamer.
+# @author Geunsik Lim <geunsik.lim@samsung.com>
+# @date   03 Dec 2018
+# @bug    No known bugs
+# @note   TODO/NYI: Interconnect a front-end GUI applicaiton and back-end tools.
+
+import gtk
+import pango
+
+##
+# @brief A GTK-based front-end GUI application
+class PyApp(gtk.Window):
+   def __init__(self):
+      super(PyApp, self).__init__()
+      self.set_title("NNStreamer Toolkits")
+      self.set_default_size(500, 400)
+      self.set_position(gtk.WIN_POS_CENTER)
+      
+      mb = gtk.MenuBar()
+
+      # Tracing menu
+      menu1 = gtk.Menu()
+      tracing = gtk.MenuItem("_Tracing")
+      tracing.set_submenu(menu1)
+
+      msg_gstshark = gtk.MenuItem("GstShark")
+      menu1.append(msg_gstshark)
+
+      # Debugging menu
+      menu2 = gtk.Menu()
+      debugging = gtk.MenuItem("_Debugging")
+      debugging.set_submenu(menu2)
+
+      msg_gstdebug = gtk.MenuItem("GST__DEBUG")
+      menu2.append(msg_gstdebug)
+
+      msg_gstdebugdump = gtk.MenuItem("GST__DEBUG__DUMP__DOT__DIR")
+      menu2.append(msg_gstdebugdump)
+
+      msg_gstdebugger = gtk.MenuItem("gst-debugger")
+      menu2.append(msg_gstdebugger)
+
+      # Profiling menu
+      menu3 = gtk.Menu()
+      profiling = gtk.MenuItem("_Profiling")
+      profiling.set_submenu(menu3)
+
+      msg_gstinstruments = gtk.MenuItem("gst-instruments")
+      menu3.append(msg_gstinstruments)
+
+      msg_hawktracer = gtk.MenuItem("HawkTracer")
+      menu3.append(msg_hawktracer)
+
+      mb.append(tracing)
+      mb.append(debugging)
+      mb.append(profiling)
+
+      # Help menu
+      menu4 = gtk.Menu()
+      hlp = gtk.MenuItem("_Help")
+      hlp.set_submenu(menu4)
+
+      color = gtk.MenuItem("Color widget")
+      menu4.append(color)
+
+      abt = gtk.MenuItem("About")
+      menu4.append(abt)
+
+      mb.append(hlp)
+
+ 
+      vbox = gtk.VBox(False, 2)
+      vbox.pack_start(mb, False, False, 0)
+      self.add(vbox)
+      self.text = gtk.Label("")
+      self.text.set_markup("<b>      NNStreamer toolkit provides tracing, debugging, and profiling tool \
+                             \n      in order that developers can deploy NNStreamer on their own devices.</b>")
+      vbox.pack_start(self.text, True, True, 0)
+
+      msg_gstshark.connect("activate",self.on_gstshark)
+      msg_gstdebug.connect("activate",self.on_gstdebug)
+      msg_gstdebugdump.connect("activate",self.on_gstdebugdump)
+      msg_gstdebugger.connect("activate",self.on_gstdebugger)
+      msg_gstinstruments.connect("activate",self.on_gstinstruments)
+      msg_hawktracer.connect("activate",self.on_hawktracer)
+      color.connect("activate",self.on_color)
+      abt.connect("activate",self.on_abtdlg)
+      
+      self.connect("destroy", gtk.main_quit)
+      self.show_all()
+
+   def on_gstshark(self, widget):
+      # MessageDialog usage code
+      md = gtk.MessageDialog(self,
+         gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR,
+         gtk.BUTTONS_CLOSE, "Welcome to GstShark.")
+      md.run()
+      md.destroy()
+
+   def on_gstdebug(self, widget):
+      # MessageDialog usage code
+      md = gtk.MessageDialog(self,
+         gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR,
+         gtk.BUTTONS_CLOSE, "Welcome to GST_DEBUG.")
+      md.run()
+      md.destroy()
+
+   def on_gstdebugdump(self, widget):
+      # MessageDialog usage code
+      md = gtk.MessageDialog(self,
+         gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR,
+         gtk.BUTTONS_CLOSE, "Welcome to GST_DEBUG_DUMP_DOT_DIR.")
+      md.run()
+      md.destroy()
+
+   def on_gstdebugger(self, widget):
+      # MessageDialog usage code
+      md = gtk.MessageDialog(self,
+         gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR,
+         gtk.BUTTONS_CLOSE, "Welcome to gst-debugger.")
+      md.run()
+      md.destroy()
+
+   def on_gstinstruments(self, widget):
+      # MessageDialog usage code
+      md = gtk.MessageDialog(self,
+         gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR,
+         gtk.BUTTONS_CLOSE, "Welcome to gst-instruments.")
+      md.run()
+      md.destroy()
+
+   def on_hawktracer(self, widget):
+      # MessageDialog usage code
+      md = gtk.MessageDialog(self,
+         gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR,
+         gtk.BUTTONS_CLOSE, "Welcome to HawkTracer.")
+      md.run()
+      md.destroy()
+
+   def on_color(self, widget):
+      #Color Chooser Dialog usage cde
+      dlg = gtk.ColorSelectionDialog("Select color")
+      col = dlg.run()
+      sel = dlg.colorsel.get_current_color()
+      self.text.modify_fg(gtk.STATE_NORMAL, sel)
+
+   def on_abtdlg(self, widget):
+      #About Dialog usage code
+      about = gtk.AboutDialog()
+      about.set_program_name("NNStreamer Toolkit")
+      about.set_version("0.0.1")
+      about.set_authors([
+            'Geunsik Lim',
+            'Bug Reports and Patches:',
+               '   MyungJoo Ham',
+               '   Jijoong Moon',
+               '   Sangjung Woo',
+               '   Wook Song',
+               '   Jaeyun Jung',
+               '   Hyoungjoo Ahn',
+            ])
+
+      about.set_copyright("(c) Samsung Electronics")
+      about.set_comments("About NNStreamer Toolkit")
+      about.set_website("https://github.com/nnsuite/nnstreamer")
+      about.run()
+      about.destroy()
+
+if __name__ == '__main__':
+   PyApp()
+   gtk.main()