Adding support for right click

res/jsoninspector.glade

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.16.1 -->
+<!-- Generated with glade 3.22.1 -->
 <interface domain="jsoninspector">
   <requires lib="gtk+" version="3.6"/>
   <object class="GtkAboutDialog" id="AboutDialog">
@@ -13,7 +13,6 @@
     <property name="type_hint">normal</property>
     <property name="deletable">False</property>
     <property name="gravity">center</property>
-    <property name="has_resize_grip">False</property>
     <property name="program_name">JSON Inspector</property>
     <property name="version">v2.0</property>
     <property name="website">https://github.com/resetreboot/jsoninspector</property>
@@ -24,6 +23,9 @@
     <property name="license_type">gpl-3-0</property>
     <signal name="close" handler="onAboutDialogClose" swapped="no"/>
     <signal name="delete-event" handler="onAboutDialogDeleteEvent" swapped="no"/>
+    <child>
+      <placeholder/>
+    </child>
     <child internal-child="vbox">
       <object class="GtkBox" id="aboutdialog-vbox1">
         <property name="can_focus">False</property>
@@ -57,6 +59,9 @@
     <property name="icon_name">jsoninspector</property>
     <signal name="delete-event" handler="onCopyJSONDelete" swapped="no"/>
     <signal name="destroy" handler="onCopyJSONDestroy" swapped="no"/>
+    <child>
+      <placeholder/>
+    </child>
     <child>
       <object class="GtkBox" id="box2">
         <property name="visible">True</property>
@@ -178,6 +183,9 @@
     <property name="window_position">center</property>
     <property name="icon_name">jsoninspector</property>
     <signal name="delete-event" handler="onMainWindowDelete" swapped="no"/>
+    <child>
+      <placeholder/>
+    </child>
     <child>
       <object class="GtkBox" id="box1">
         <property name="visible">True</property>
@@ -238,6 +246,36 @@
                 </child>
               </object>
             </child>
+            <child>
+              <object class="GtkMenuItem">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="label" translatable="yes">_Edit</property>
+                <property name="use_underline">True</property>
+                <child type="submenu">
+                  <object class="GtkMenu">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <child>
+                      <object class="GtkMenuItem">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">_Copy</property>
+                        <property name="use_underline">True</property>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkMenuItem">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <property name="label" translatable="yes">C_ut</property>
+                        <property name="use_underline">True</property>
+                      </object>
+                    </child>
+                  </object>
+                </child>
+              </object>
+            </child>
             <child>
               <object class="GtkMenuItem" id="menuitem4">
                 <property name="visible">True</property>
@@ -288,6 +326,7 @@
                 <property name="expander_column">treeviewcolumn1</property>
                 <property name="search_column">0</property>
                 <property name="level_indentation">1</property>
+                <signal name="button-press-event" handler="onButtonPressEvent" swapped="no"/>
                 <child internal-child="selection">
                   <object class="GtkTreeSelection" id="treeview-selection"/>
                 </child>

src/jsoninspector/jsoninspector.py

@@ -3,7 +3,7 @@
 
 import gi
 gi.require_version('Gtk', '3.0')
-from gi.repository import Gtk, Gio
+from gi.repository import Gtk, Gio, Gdk
 
 import json
 import sys
@@ -196,6 +196,14 @@ class MainWindowMethods(Gtk.Application):
     def onAboutDialogDeleteEvent(self, widget, event=None):
         pass
 
+    def onButtonPressEvent(self, event=None):
+        if event.type == Gdk.GDK_BUTTON_PRESS and event.button == 3:
+            pass
+            return True
+
+        else:
+            return False
+
 
 class LogicObject(object):
     """