WIP: refined solution - some bug fixes, XML file is backward compatible now

src/icons/icons.qrc

@@ -52,6 +52,8 @@
         <file alias="clear_edit_16px@2x.png">images/clear_edit_16px@2x.png</file>
         <file alias="clearbreakpoints_16px.png">images/clearbreakpoints_16px.png</file>
         <file alias="clearbreakpoints_16px@2x.png">images/clearbreakpoints_16px@2x.png</file>
+        <file alias="clone_16px.png">images/clone_16px.png</file>
+        <file alias="clone_16px@2x.png">images/clone_16px@2x.png</file>
         <file alias="cm_add_24px.png">images/cm_add_24px.png</file>
         <file alias="cm_add_24px@2x.png">images/cm_add_24px@2x.png</file>
         <file alias="cm_diff_24px.png">images/cm_diff_24px.png</file>

src/icons/svg/clone_16px.svg

@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="16"
+   height="16"
+   viewBox="0 0 4.2333332 4.2333335"
+   version="1.1"
+   id="svg1011"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   sodipodi:docname="clone_16px.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1013"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:document-units="px"
+     showgrid="true"
+     units="px"
+     inkscape:snap-nodes="true"
+     inkscape:snap-bbox="true"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-others="false"
+     inkscape:zoom="34.576923"
+     inkscape:cx="2.6173526"
+     inkscape:cy="10.006674"
+     inkscape:window-width="1846"
+     inkscape:window-height="1016"
+     inkscape:window-x="74"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1"
+     width="16px">
+    <inkscape:grid
+       type="xygrid"
+       id="grid1074"
+       spacingx="0.13229167"
+       spacingy="0.13229167"
+       empspacing="2" />
+  </sodipodi:namedview>
+  <defs
+     id="defs1008">
+    <linearGradient
+       id="linearGradient3600">
+      <stop
+         style="stop-color:#ff9f3f;stop-opacity:1;"
+         offset="0"
+         id="stop3602" />
+      <stop
+         style="stop-color:#ffffff;stop-opacity:1;"
+         offset="1"
+         id="stop3604" />
+    </linearGradient>
+  </defs>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       style="fill:none;fill-rule:evenodd;stroke:#fdfdfd;stroke-width:0.79375;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.5"
+       d="M 0.92604171,2.3812501 V 1.9843751 H 1.9843751 V 0.92604171 h 0.79375 V 1.9843751 h 1.0583333 v 0.79375 H 2.7781251 v 1.0583333 h -0.79375 V 2.7781251 H 0.92604171 Z"
+       id="path828" />
+    <path
+       style="fill:#808080;fill-opacity:1;fill-rule:evenodd;stroke:#808080;stroke-width:0.264583;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       d="M 0.92604171,2.3812501 V 1.9843751 H 1.9843751 V 0.92604171 h 0.79375 V 1.9843751 h 1.0583333 v 0.79375 H 2.7781251 v 1.0583333 h -0.79375 V 2.7781251 H 0.92604171 Z"
+       id="path830" />
+    <path
+       style="fill:none;fill-rule:evenodd;stroke:#fdfdfd;stroke-width:0.79375;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.5"
+       d="M 0.39687504,1.8520834 V 1.4552084 H 1.4552084 V 0.39687504 h 0.79375 V 1.4552084 h 1.0583333 v 0.79375 H 2.2489584 v 1.0583333 h -0.79375 V 2.2489584 H 0.39687504 Z"
+       id="path3331" />
+    <rect
+       style="fill:none;stroke:#865b26;stroke-width:0;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect3596"
+       width="4.2333326"
+       height="4.2333331"
+       x="3.3333333e-07"
+       y="3.3333333e-07"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/lay/images/back.png"
+       inkscape:export-xdpi="27.093315"
+       inkscape:export-ydpi="27.093315" />
+    <path
+       style="fill:#404040;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.264583;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       d="M 0.39687504,1.8520834 V 1.4552084 H 1.4552084 V 0.39687504 h 0.79375 V 1.4552084 h 1.0583333 v 0.79375 H 2.2489584 v 1.0583333 h -0.79375 V 2.2489584 H 0.39687504 Z"
+       id="path2830" />
+  </g>
+</svg>

src/lay/lay/TechSetupDialog.ui

@@ -108,6 +108,9 @@
           </property>
           <item>
            <widget class="QToolButton" name="add_pb">
+            <property name="toolTip">
+             <string>Add technology</string>
+            </property>
             <property name="text">
              <string>...</string>
             </property>
@@ -116,12 +119,15 @@
               <normaloff>:/add_16px.png</normaloff>:/add_16px.png</iconset>
             </property>
             <property name="autoRaise">
-             <bool>true</bool>
+             <bool>false</bool>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QToolButton" name="delete_pb">
+            <property name="toolTip">
+             <string>Delete technology</string>
+            </property>
             <property name="text">
              <string>...</string>
             </property>
@@ -130,33 +136,37 @@
               <normaloff>:/clear_16px.png</normaloff>:/clear_16px.png</iconset>
             </property>
             <property name="autoRaise">
-             <bool>true</bool>
+             <bool>false</bool>
             </property>
            </widget>
           </item>
           <item>
-           <spacer>
+           <widget class="QToolButton" name="rename_pb">
+            <property name="toolTip">
+             <string>Rename technology</string>
+            </property>
+            <property name="text">
+             <string>Rename</string>
+            </property>
+            <property name="icon">
+             <iconset resource="../../icons/icons.qrc">
+              <normaloff>:/rename_16px@2x.png</normaloff>:/rename_16px@2x.png</iconset>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <spacer name="horizontalSpacer">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
-            <property name="sizeType">
-             <enum>QSizePolicy::Expanding</enum>
-            </property>
             <property name="sizeHint" stdset="0">
              <size>
-              <width>141</width>
+              <width>40</width>
               <height>20</height>
              </size>
             </property>
            </spacer>
           </item>
-          <item>
-           <widget class="QToolButton" name="rename_pb">
-            <property name="text">
-             <string>Rename</string>
-            </property>
-           </widget>
-          </item>
          </layout>
         </widget>
        </item>

src/plugins/tools/net_tracer/db_plugin/dbNetTracerIO.h

@@ -435,6 +435,16 @@ public:
     m_symbols.clear ();
   }
 
+  void clear_connections ()
+  {
+    m_connections.clear ();
+  }
+
+  void clear_symbols ()
+  {
+    m_symbols.clear ();
+  }
+
   void erase (iterator p)
   {
     m_connections.erase (p);
@@ -524,7 +534,7 @@ public:
 
   const_iterator end () const
   {
-    return m_connectivity.begin ();
+    return m_connectivity.end ();
   }
 
   iterator begin ()

src/plugins/tools/net_tracer/db_plugin/dbNetTracerPlugin.cc

@@ -68,26 +68,94 @@ namespace tl
 namespace
 {
 
-template <class Value>
+static const db::NetTracerConnectivity *
-struct FallbackXMLWriteAdapator
+get_default (const db::NetTracerTechnologyComponent &tc)
 {
-  FallbackXMLWriteAdapator (void (db::NetTracerConnectivity::*member) (const Value &))
+  for (auto d = tc.begin (); d != tc.end (); ++d) {
-    : mp_member (member)
+    if (d->name ().empty ()) {
+      return d.operator-> ();
+    }
+  }
+
+  if (tc.begin () != tc.end ()) {
+    return tc.begin ().operator-> ();
+  } else {
+    return 0;
+  }
+}
+
+template <class Value>
+struct FallbackXMLWriteAdaptor
+{
+  FallbackXMLWriteAdaptor (void (db::NetTracerConnectivity::*member) (const Value &), void (db::NetTracerConnectivity::*clear) ())
+    : mp_member (member), mp_clear (clear), mp_stack (0)
   {
     // .. nothing yet ..
   }
 
   void operator () (db::NetTracerTechnologyComponent &owner, tl::XMLReaderState &reader) const
   {
-    if (owner.size () == 0) {
+    if (! mp_stack) {
-      owner.push_back (db::NetTracerConnectivity ());
+      mp_stack = const_cast<db::NetTracerConnectivity *> (get_default (owner));
+      if (! mp_stack) {
+        owner.push_back (db::NetTracerConnectivity ());
+        mp_stack = (owner.end () - 1).operator-> ();
+      }
+      (mp_stack->*mp_clear) ();
     }
+
     tl::XMLObjTag<Value> tag;
-    ((*owner.begin ()).*mp_member) (*reader.back (tag));
+    (mp_stack->*mp_member) (*reader.back (tag));
   }
 
 private:
   void (db::NetTracerConnectivity::*mp_member) (const Value &);
+  void (db::NetTracerConnectivity::*mp_clear) ();
+  mutable db::NetTracerConnectivity *mp_stack;
+};
+
+template <class Value, class Iter>
+struct FallbackXMLReadAdaptor
+{
+  typedef tl::pass_by_ref_tag tag;
+
+  FallbackXMLReadAdaptor (Iter (db::NetTracerConnectivity::*begin) () const, Iter (db::NetTracerConnectivity::*end) () const)
+    : mp_begin (begin), mp_end (end)
+  {
+    // .. nothing yet ..
+  }
+
+  Value operator () () const
+  {
+    return *m_iter;
+  }
+
+  bool at_end () const
+  {
+    return m_iter == m_end;
+  }
+
+  void start (const db::NetTracerTechnologyComponent &parent)
+  {
+    const db::NetTracerConnectivity *tn = get_default (parent);
+    if (! tn) {
+      m_iter = Iter ();
+      m_end = Iter ();
+    } else {
+      m_iter = (tn->*mp_begin) ();
+      m_end = (tn->*mp_end) ();
+    }
+  }
+
+  void next ()
+  {
+    ++m_iter;
+  }
+
+private:
+  Iter (db::NetTracerConnectivity::*mp_begin) () const;
+  Iter (db::NetTracerConnectivity::*mp_end) () const;
+  Iter m_iter, m_end;
 };
 
 }
@@ -113,20 +181,20 @@ public:
   virtual tl::XMLElementBase *xml_element () const
   {
     return new db::TechnologyComponentXMLElement<NetTracerTechnologyComponent> (net_tracer_component_name (),
-      //  Fallback readers for migrating pre-0.28 setups to 0.28
-      tl::XMLMember<NetTracerConnectionInfo, NetTracerTechnologyComponent, tl::XMLMemberDummyReadAdaptor <NetTracerConnectionInfo, NetTracerTechnologyComponent>, FallbackXMLWriteAdapator <NetTracerConnectionInfo>, tl::XMLStdConverter <NetTracerConnectionInfo> > (
-        tl::XMLMemberDummyReadAdaptor <NetTracerConnectionInfo, NetTracerTechnologyComponent> (),
-        FallbackXMLWriteAdapator <NetTracerConnectionInfo> (&NetTracerConnectivity::add), "connection") +
-      tl::XMLMember<NetTracerSymbolInfo, NetTracerTechnologyComponent, tl::XMLMemberDummyReadAdaptor <NetTracerSymbolInfo, NetTracerTechnologyComponent>, FallbackXMLWriteAdapator <NetTracerSymbolInfo>, tl::XMLStdConverter <NetTracerSymbolInfo> > (
-        tl::XMLMemberDummyReadAdaptor <NetTracerSymbolInfo, NetTracerTechnologyComponent> (),
-        FallbackXMLWriteAdapator <NetTracerSymbolInfo> (&NetTracerConnectivity::add_symbol), "symbols") +
       //  0.28 definitions
-      tl::make_element ((NetTracerTechnologyComponent::const_iterator (NetTracerTechnologyComponent::*) () const) &NetTracerTechnologyComponent::begin, (NetTracerTechnologyComponent::const_iterator (NetTracerTechnologyComponent::*) () const) &NetTracerTechnologyComponent::end, (void (NetTracerTechnologyComponent::*) (const NetTracerConnectivity &)) &NetTracerTechnologyComponent::push_back, "connectivity",
+      tl::make_element ((NetTracerTechnologyComponent::const_iterator (NetTracerTechnologyComponent::*) () const) &NetTracerTechnologyComponent::begin, (NetTracerTechnologyComponent::const_iterator (NetTracerTechnologyComponent::*) () const) &NetTracerTechnologyComponent::end, (void (NetTracerTechnologyComponent::*) (const NetTracerConnectivity &)) &NetTracerTechnologyComponent::push_back, "stack",
         tl::make_member (&NetTracerConnectivity::name, &NetTracerConnectivity::set_name, "name") +
         tl::make_member (&NetTracerConnectivity::description, &NetTracerConnectivity::set_description, "description") +
         tl::make_member ((NetTracerConnectivity::const_iterator (NetTracerConnectivity::*) () const) &NetTracerConnectivity::begin, (NetTracerConnectivity::const_iterator (NetTracerConnectivity::*) () const) &NetTracerConnectivity::end, &NetTracerConnectivity::add, "connection") +
         tl::make_member ((NetTracerConnectivity::const_symbol_iterator (NetTracerConnectivity::*) () const) &NetTracerConnectivity::begin_symbols, (NetTracerConnectivity::const_symbol_iterator (NetTracerConnectivity::*) () const) &NetTracerConnectivity::end_symbols, &NetTracerConnectivity::add_symbol, "symbols")
-      )
+      ) +
+      //  Fallback readers for migrating pre-0.28 setups to 0.28 and backward compatibility
+      tl::XMLMember<NetTracerConnectionInfo, NetTracerTechnologyComponent, FallbackXMLReadAdaptor <NetTracerConnectionInfo, NetTracerConnectivity::const_iterator>, FallbackXMLWriteAdaptor <NetTracerConnectionInfo>, tl::XMLStdConverter <NetTracerConnectionInfo> > (
+        FallbackXMLReadAdaptor <NetTracerConnectionInfo, NetTracerConnectivity::const_iterator> (&NetTracerConnectivity::begin, &NetTracerConnectivity::end),
+        FallbackXMLWriteAdaptor <NetTracerConnectionInfo> (&NetTracerConnectivity::add, &NetTracerConnectivity::clear_connections), "connection") +
+      tl::XMLMember<NetTracerSymbolInfo, NetTracerTechnologyComponent, FallbackXMLReadAdaptor <NetTracerSymbolInfo, NetTracerConnectivity::const_symbol_iterator>, FallbackXMLWriteAdaptor <NetTracerSymbolInfo>, tl::XMLStdConverter <NetTracerSymbolInfo> > (
+        FallbackXMLReadAdaptor <NetTracerSymbolInfo, NetTracerConnectivity::const_symbol_iterator> (&NetTracerConnectivity::begin_symbols, &NetTracerConnectivity::end_symbols),
+        FallbackXMLWriteAdaptor <NetTracerSymbolInfo> (&NetTracerConnectivity::add_symbol, &NetTracerConnectivity::clear_symbols), "symbols")
     );
   }
 };

src/plugins/tools/net_tracer/lay_plugin/NetTracerTechComponentEditor.ui

@@ -20,6 +20,12 @@
       <enum>Qt::Horizontal</enum>
      </property>
      <widget class="QFrame" name="frame_5">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
       <property name="frameShape">
        <enum>QFrame::NoFrame</enum>
       </property>
@@ -39,8 +45,11 @@
        <property name="bottomMargin">
         <number>0</number>
        </property>
-       <item row="4" column="4">
+       <item row="4" column="5">
         <widget class="QToolButton" name="move_down_pb">
+         <property name="toolTip">
+          <string>Move selected stacks up</string>
+         </property>
          <property name="text">
           <string>...</string>
          </property>
@@ -50,32 +59,24 @@
          </property>
         </widget>
        </item>
-       <item row="4" column="2">
+       <item row="4" column="0" colspan="2">
-        <widget class="QToolButton" name="del_pb">
+        <widget class="QToolButton" name="add_pb">
+         <property name="toolTip">
+          <string>Add new stack</string>
+         </property>
          <property name="text">
           <string>...</string>
          </property>
          <property name="icon">
           <iconset resource="../../../../icons/icons.qrc">
-           <normaloff>:/del_16px.png</normaloff>:/del_16px.png</iconset>
+           <normaloff>:/add_16px.png</normaloff>:/add_16px.png</iconset>
          </property>
          <property name="shortcut">
-          <string>Del</string>
+          <string>Return</string>
          </property>
         </widget>
        </item>
-       <item row="4" column="3">
+       <item row="2" column="1" colspan="6">
-        <widget class="QToolButton" name="move_up_pb">
-         <property name="text">
-          <string>...</string>
-         </property>
-         <property name="icon">
-          <iconset resource="../../../../icons/icons.qrc">
-           <normaloff>:/up_16px.png</normaloff>:/up_16px.png</iconset>
-         </property>
-        </widget>
-       </item>
-       <item row="2" column="1" colspan="5">
         <widget class="QFrame" name="frame_2">
          <property name="frameShape">
           <enum>QFrame::NoFrame</enum>
@@ -85,19 +86,7 @@
          </property>
         </widget>
        </item>
-       <item row="3" column="0" colspan="6">
+       <item row="1" column="0" rowspan="2" colspan="7">
-        <widget class="QLabel" name="label">
-         <property name="font">
-          <font>
-           <italic>true</italic>
-          </font>
-         </property>
-         <property name="text">
-          <string>Double-click to edit text</string>
-         </property>
-        </widget>
-       </item>
-       <item row="1" column="0" rowspan="2" colspan="6">
         <widget class="QTreeWidget" name="stack_tree">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
@@ -105,9 +94,18 @@
            <verstretch>1</verstretch>
           </sizepolicy>
          </property>
+         <property name="contextMenuPolicy">
+          <enum>Qt::ActionsContextMenu</enum>
+         </property>
+         <property name="selectionMode">
+          <enum>QAbstractItemView::ExtendedSelection</enum>
+         </property>
          <property name="rootIsDecorated">
           <bool>false</bool>
          </property>
+         <property name="allColumnsShowFocus">
+          <bool>true</bool>
+         </property>
          <column>
           <property name="text">
            <string>Name</string>
@@ -120,7 +118,50 @@
          </column>
         </widget>
        </item>
-       <item row="4" column="5">
+       <item row="4" column="3">
+        <widget class="QToolButton" name="del_pb">
+         <property name="toolTip">
+          <string>Remove selected stacks</string>
+         </property>
+         <property name="text">
+          <string>...</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../../../../icons/icons.qrc">
+           <normaloff>:/del_16px.png</normaloff>:/del_16px.png</iconset>
+         </property>
+         <property name="shortcut">
+          <string>Del</string>
+         </property>
+        </widget>
+       </item>
+       <item row="4" column="4">
+        <widget class="QToolButton" name="move_up_pb">
+         <property name="toolTip">
+          <string>Move selected stacks down</string>
+         </property>
+         <property name="text">
+          <string>...</string>
+         </property>
+         <property name="icon">
+          <iconset resource="../../../../icons/icons.qrc">
+           <normaloff>:/up_16px.png</normaloff>:/up_16px.png</iconset>
+         </property>
+        </widget>
+       </item>
+       <item row="3" column="0" colspan="7">
+        <widget class="QLabel" name="label">
+         <property name="font">
+          <font>
+           <italic>true</italic>
+          </font>
+         </property>
+         <property name="text">
+          <string>Double-click to edit text</string>
+         </property>
+        </widget>
+       </item>
+       <item row="4" column="6">
         <spacer name="horizontalSpacer">
          <property name="orientation">
           <enum>Qt::Horizontal</enum>
@@ -133,24 +174,24 @@
          </property>
         </spacer>
        </item>
-       <item row="4" column="0" colspan="2">
+       <item row="0" column="0" colspan="7">
-        <widget class="QToolButton" name="add_pb">
+        <widget class="QLabel" name="label_2">
+         <property name="text">
+          <string>Technology Stacks</string>
+         </property>
+        </widget>
+       </item>
+       <item row="4" column="2">
+        <widget class="QToolButton" name="clone_pb">
+         <property name="toolTip">
+          <string>Clone current stack</string>
+         </property>
          <property name="text">
           <string>...</string>
          </property>
          <property name="icon">
           <iconset resource="../../../../icons/icons.qrc">
-           <normaloff>:/add_16px.png</normaloff>:/add_16px.png</iconset>
+           <normaloff>:/clone_16px.png</normaloff>:/clone_16px.png</iconset>
-         </property>
-         <property name="shortcut">
-          <string>Return</string>
-         </property>
-        </widget>
-       </item>
-       <item row="0" column="0" colspan="6">
-        <widget class="QLabel" name="label_2">
-         <property name="text">
-          <string>Technology Stacks</string>
          </property>
         </widget>
        </item>

src/plugins/tools/net_tracer/lay_plugin/layNetTracerTechComponentEditor.cc

@@ -135,8 +135,20 @@ NetTracerTechComponentEditor::NetTracerTechComponentEditor (QWidget *parent)
 {
   Ui::NetTracerTechComponentEditor::setupUi (this);
 
+  QAction *action;
+  action = new QAction (QObject::tr ("Add Stack"), this);
+  connect (action, SIGNAL (triggered ()), this, SLOT (add_clicked ()));
+  stack_tree->addAction (action);
+  action = new QAction (QObject::tr ("Delete Selected Stacks"), this);
+  connect (action, SIGNAL (triggered ()), this, SLOT (delete_clicked ()));
+  stack_tree->addAction (action);
+  action = new QAction (QObject::tr ("Duplicate Stack"), this);
+  connect (action, SIGNAL (triggered ()), this, SLOT (clone_clicked ()));
+  stack_tree->addAction (action);
+
   connect (add_pb, SIGNAL (clicked ()), this, SLOT (add_clicked ()));
   connect (del_pb, SIGNAL (clicked ()), this, SLOT (del_clicked ()));
+  connect (clone_pb, SIGNAL (clicked ()), this, SLOT (clone_clicked ()));
   connect (move_up_pb, SIGNAL (clicked ()), this, SLOT (move_up_clicked ()));
   connect (move_down_pb, SIGNAL (clicked ()), this, SLOT (move_down_clicked ()));
 
@@ -154,6 +166,7 @@ NetTracerTechComponentEditor::commit ()
     return;
   }
 
+  commit_current ();
   *data = m_data;
 }
 
@@ -175,6 +188,11 @@ NetTracerTechComponentEditor::setup ()
   stack_tree->setItemDelegateForColumn (1, new NetTracerTechComponentColumnDelegate (stack_tree, &m_data));
 
   update ();
+
+  if (stack_tree->topLevelItemCount () > 0) {
+    stack_tree->setCurrentItem (stack_tree->topLevelItem (0));
+  }
+  current_item_changed (stack_tree->currentItem (), 0);
 }
 
 void
@@ -207,6 +225,46 @@ NetTracerTechComponentEditor::commit_current (QTreeWidgetItem *current)
   }
 }
 
+static std::string
+new_name (const db::NetTracerTechnologyComponent &data)
+{
+  for (int i = 1; ; ++i) {
+    std::string n = "STACK" + tl::to_string (i);
+    bool found = false;
+    for (auto d = data.begin (); d != data.end () && ! found; ++d) {
+      found = (d->name () == n);
+    }
+    if (! found) {
+      return n;
+    }
+  }
+
+  return std::string ();
+}
+
+void
+NetTracerTechComponentEditor::clone_clicked ()
+{
+  //  removes focus from the tree view - commits the data
+  add_pb->setFocus ();
+  commit_current ();
+
+  int row = stack_tree->currentItem () ? stack_tree->indexOfTopLevelItem (stack_tree->currentItem ()) : -1;
+  if (row < 0) {
+    m_data.push_back (db::NetTracerConnectivity ());
+    row = int (m_data.size () - 1);
+  } else {
+    row += 1;
+    m_data.insert (m_data.begin () + row, db::NetTracerConnectivity ());
+    m_data.begin ()[row] = m_data.begin ()[row - 1];
+  }
+
+  m_data.begin ()[row].set_name (new_name (m_data));
+
+  update ();
+  stack_tree->setCurrentItem (stack_tree->topLevelItem (row));
+}
+
 void
 NetTracerTechComponentEditor::add_clicked ()
 {
@@ -223,6 +281,8 @@ NetTracerTechComponentEditor::add_clicked ()
     m_data.insert (m_data.begin () + row, db::NetTracerConnectivity ());
   }
 
+  m_data.begin ()[row].set_name (new_name (m_data));
+
   update ();
   stack_tree->setCurrentItem (stack_tree->topLevelItem (row));
 }
@@ -355,16 +415,12 @@ NetTracerTechComponentEditor::update ()
     } else {
       item->setData (0, Qt::DisplayRole, QVariant (tl::to_qstring (name)));
     }
-    item->setData (1, Qt::DisplayRole, QVariant (tl::to_qstring (l->description ())));
-
     item->setData (0, Qt::UserRole, QVariant (n));
 
-  }
+    item->setData (1, Qt::DisplayRole, QVariant (tl::to_qstring (l->description ())));
+    item->setData (1, Qt::UserRole, QVariant (n));
 
-  if (! stack_tree->currentItem () && stack_tree->topLevelItemCount () > 0) {
-    stack_tree->setCurrentItem (stack_tree->topLevelItem (0));
   }
-  current_item_changed (stack_tree->currentItem (), 0);
 }
 
 }

src/plugins/tools/net_tracer/lay_plugin/layNetTracerTechComponentEditor.h

@@ -62,6 +62,7 @@ public:
 
 public slots:
   void add_clicked ();
+  void clone_clicked ();
   void del_clicked ();
   void move_up_clicked ();
   void move_down_clicked ();