WIP

src/lay/lay/layClipDialog.cc

@@ -66,7 +66,7 @@ static tl::RegisteredClass<lay::PluginDeclaration> config_decl (new ClipDialogPl
 
 // ------------------------------------------------------------
 
-ClipDialog::ClipDialog (lay::Dispatcher *root, lay::LayoutView *vw)
+ClipDialog::ClipDialog (lay::Dispatcher *root, LayoutViewBase *vw)
   : lay::Browser (root, vw), 
     Ui::ClipDialog ()
 {

src/lay/lay/layClipDialog.h

@@ -40,7 +40,7 @@ class ClipDialog
 Q_OBJECT 
 
 public:
-  ClipDialog (lay::Dispatcher *root, lay::LayoutView *view);
+  ClipDialog (lay::Dispatcher *root, lay::LayoutViewBase *view);
   ~ClipDialog ();
 
 public slots:

src/lay/lay/layFillDialog.cc

@@ -73,8 +73,8 @@ static tl::RegisteredClass<lay::PluginDeclaration> config_decl (new FillDialogPl
 
 // ------------------------------------------------------------
 
-FillDialog::FillDialog (lay::Dispatcher *main, lay::LayoutView *view)
+FillDialog::FillDialog (lay::Dispatcher *main, LayoutViewBase *view)
-  : QDialog (view),
+  : QDialog (view->widget ()),
     lay::Plugin (main),
     Ui::FillDialog (),
     mp_view (view)
@@ -315,8 +315,14 @@ FillDialog::get_fill_parameters ()
 
   } else if (layer_spec_cbx->currentIndex () == 2) {
 
-    //  selected layers
+    //  get selected layers
-    std::vector<lay::LayerPropertiesConstIterator> s = mp_view->selected_layers ();
+    std::vector<lay::LayerPropertiesConstIterator> s;
+
+    lay::LayoutView *lv = dynamic_cast<lay::LayoutView *> (mp_view);
+    if (lv) {
+      s = lv->selected_layers (); // @@@ should be part of LayoutViewBase too
+    }
+
     for (std::vector<lay::LayerPropertiesConstIterator>::const_iterator l = s.begin (); l != s.end (); ++l) {
       if (! (*l)->has_children () && cv->layout ().is_valid_layer ((*l)->layer_index ())) {
         fp.exclude_layers.push_back (cv->layout ().get_properties ((*l)->layer_index ()));

src/lay/lay/layFillDialog.h

@@ -76,7 +76,7 @@ class LAY_PUBLIC FillDialog
 Q_OBJECT 
 
 public:
-  FillDialog (lay::Dispatcher *root, lay::LayoutView *view);
+  FillDialog (lay::Dispatcher *root, lay::LayoutViewBase *view);
   ~FillDialog ();
 
 public slots:
@@ -95,7 +95,7 @@ private:
   void generate_fill (const FillParameters &fp);
   FillParameters get_fill_parameters ();
 
-  lay::LayoutView *mp_view;
+  lay::LayoutViewBase *mp_view;
 };
 
 }

src/lay/lay/layMainWindow.cc

@@ -159,7 +159,7 @@ MainWindow::MainWindow (QApplication *app, const char *name, bool undo_enabled)
     : QMainWindow (0),
       tl::Object (),
       lay::DispatcherDelegate (),
-      m_dispatcher (this, this),
+      m_dispatcher (this),
       m_text_progress (this, 10 /*verbosity threshold*/),
       m_mode (std::numeric_limits<unsigned int>::max ()),
       mp_setup_form (0),
@@ -179,6 +179,8 @@ MainWindow::MainWindow (QApplication *app, const char *name, bool undo_enabled)
       mp_app (app),
       m_manager (undo_enabled)
 {
+  m_dispatcher.set_menu_parent_widget (this);
+
   //  ensures the deferred method scheduler is present
   tl::DeferredMethodScheduler::instance ();
 

src/lay/lay/laySearchReplacePlugin.cc

@@ -65,7 +65,9 @@ public:
  
   virtual lay::Plugin *create_plugin (db::Manager *, lay::Dispatcher *root, lay::LayoutViewBase *view) const
   {
-    return new SearchReplaceDialog (root, view);
+    lay::LayoutView *lv = dynamic_cast<lay::LayoutView *> (view);
+    tl_assert (lv != 0);
+    return new SearchReplaceDialog (root, lv);
   }
 };
 

src/laybasic/laybasic/layCellSelectionForm.cc

@@ -49,7 +49,7 @@ static const std::string cfg_cell_selection_search_use_expressions ("cell-select
 
 // ------------------------------------------------------------
 
-CellSelectionForm::CellSelectionForm (QWidget *parent, LayoutView *view, const char *name, bool simple_mode)
+CellSelectionForm::CellSelectionForm (QWidget *parent, LayoutViewBase *view, const char *name, bool simple_mode)
   : QDialog (parent), Ui::CellSelectionForm (),
     mp_view (view),
     m_current_cv (-1),

src/laybasic/laybasic/layCellSelectionForm.h

@@ -49,7 +49,7 @@ class LAYBASIC_PUBLIC CellSelectionForm
   Q_OBJECT 
 
 public:
-  CellSelectionForm (QWidget *parent, LayoutView *view, const char *name, bool simple_mode = false);
+  CellSelectionForm (QWidget *parent, LayoutViewBase *view, const char *name, bool simple_mode = false);
 
   /**
    *  @brief Obtain the selected cellview's index (with changes)
@@ -76,7 +76,7 @@ public slots:
   void find_prev_clicked();
 
 private:
-  lay::LayoutView *mp_view;
+  lay::LayoutViewBase *mp_view;
   std::vector <lay::CellView> m_cellviews;
   int m_current_cv;
   bool m_name_cb_enabled;

src/laybasic/laybasic/layCellTreeModel.cc

@@ -303,7 +303,7 @@ CellTreeItem::by_area_equal_than (const CellTreeItem *b) const
 //  valid ("under construction"). In this case, the model will return defaults or void
 //  objects.
 
-CellTreeModel::CellTreeModel (QWidget *parent, lay::LayoutView *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting)
+CellTreeModel::CellTreeModel (QWidget *parent, lay::LayoutViewBase *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting)
   : QAbstractItemModel (parent), 
     m_flags (flags),
     m_sorting (sorting),
@@ -379,7 +379,7 @@ CellTreeModel::~CellTreeModel ()
 }
 
 void
-CellTreeModel::configure (lay::LayoutView *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting)
+CellTreeModel::configure (lay::LayoutViewBase *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting)
 {
   db::Layout *layout = & view->cellview (cv_index)->layout ();
   do_configure (layout, 0, view, cv_index, flags, base, sorting);
@@ -398,7 +398,7 @@ CellTreeModel::configure (db::Library *library, unsigned int flags, const db::Ce
 }
 
 void
-CellTreeModel::do_configure (db::Layout *layout, db::Library *library, lay::LayoutView *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting)
+CellTreeModel::do_configure (db::Layout *layout, db::Library *library, lay::LayoutViewBase *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting)
 {
   bool flat = ((flags & Flat) != 0) && ((flags & TopCells) == 0);
 

src/laybasic/laybasic/layCellTreeModel.h

@@ -45,7 +45,7 @@ namespace db
 namespace lay
 {
 
-class LayoutView;
+class LayoutViewBase;
 class CellTreeItem;
 
 /**
@@ -85,7 +85,7 @@ public:
    *  If flags "Children" or "Parents" are given, "base" must be set to the cell of which
    *  the children or parents should be derived.
    */
-  CellTreeModel (QWidget *parent, lay::LayoutView *view, int cv_index, unsigned int flags = 0, const db::Cell *base = 0, Sorting sorting = ByName);
+  CellTreeModel (QWidget *parent, lay::LayoutViewBase *view, int cv_index, unsigned int flags = 0, const db::Cell *base = 0, Sorting sorting = ByName);
 
   /**
    *  @brief Constructor
@@ -120,7 +120,7 @@ public:
   /**
    *  @brief Reconfigures the model with a LayoutView
    */
-  void configure (lay::LayoutView *view, int cv_index, unsigned int flags = 0, const db::Cell *base = 0, Sorting sorting = ByName);
+  void configure (LayoutViewBase *view, int cv_index, unsigned int flags = 0, const db::Cell *base = 0, Sorting sorting = ByName);
 
   /**
    *  @brief Reconfigures the model with a pure Layout
@@ -257,7 +257,7 @@ private:
   unsigned int m_flags;
   Sorting m_sorting;
   QWidget *mp_parent;
-  lay::LayoutView *mp_view;
+  lay::LayoutViewBase *mp_view;
   db::Layout *mp_layout;
   db::Library *mp_library;
   int m_cv_index;
@@ -271,7 +271,7 @@ private:
   void build_top_level ();
   void clear_top_level ();
   bool search_children (const tl::GlobPattern &pattern, CellTreeItem *item);
-  void do_configure (db::Layout *layout, db::Library *library, lay::LayoutView *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting);
+  void do_configure (db::Layout *layout, db::Library *library, LayoutViewBase *view, int cv_index, unsigned int flags, const db::Cell *base, Sorting sorting);
 };
 
 /**

src/laybasic/laybasic/layLayoutView.cc

@@ -321,6 +321,12 @@ LayoutView::~LayoutView ()
   mp_bookmarks_view = 0;
 }
 
+void
+LayoutView::do_change_active_cellview ()
+{
+  dm_setup_editor_option_pages ();
+}
+
 lay::EditorOptionsPages *LayoutView::editor_options_pages ()
 {
   if (! mp_editor_options_frame) {
@@ -614,21 +620,6 @@ LayoutView::set_or_request_current_layer (unsigned int cv_index, const db::Layer
   return false;
 }
 
-bool
-LayoutView::set_current_layer (unsigned int cv_index, const db::LayerProperties &lp) 
-{
-  //  rename the ones that got shifted.
-  lay::LayerPropertiesConstIterator l = begin_layers ();
-  while (! l.at_end ()) {
-    if (l->source (true).cv_index () == int (cv_index) && l->source (true).layer_props ().log_equal (lp)) {
-      set_current_layer (l);
-      return true;
-    }
-    ++l;
-  }
-  return false;
-}
-
 void
 LayoutView::set_current_layer (const lay::LayerPropertiesConstIterator &l) 
 {
@@ -637,12 +628,6 @@ LayoutView::set_current_layer (const lay::LayerPropertiesConstIterator &l)
   }
 }
 
-void
-LayoutView::do_set_current_layer (const lay::LayerPropertiesConstIterator &l)
-{
-  set_current_layer (l);
-}
-
 lay::LayerPropertiesConstIterator
 LayoutView::current_layer () const
 {
@@ -838,67 +823,6 @@ LayoutView::do_set_phase (int phase)
   }
 }
 
-void
-LayoutView::enable_active_cellview_changed_event (bool enable, bool silent)
-{
-  if (m_active_cellview_changed_event_enabled == enable) {
-    return;
-  }
-
-  m_active_cellview_changed_event_enabled = enable;
-  if (enable) {
-
-    if (!silent && ! m_active_cellview_changed_events.empty ()) {
-
-      //  deliver stored events
-
-      //  we need to cancel pending drawing or dragging operations to reflect the new cellview (different target, may have different technology etc.)
-      cancel_esc ();
-
-      //  we need to setup the editor option pages because the technology may have changed
-      dm_setup_editor_option_pages ();
-
-      active_cellview_changed_event ();
-      for (std::set<int>::const_iterator i = m_active_cellview_changed_events.begin (); i != m_active_cellview_changed_events.end (); ++i) {
-        active_cellview_changed_with_index_event (*i);
-      }
-
-      //  Because the title reflects the active one, emit a title changed event
-      if (title_string ().empty ()) {
-        emit title_changed ();
-      }
-
-    }
-
-  }
-
-  m_active_cellview_changed_events.clear ();
-}
-
-void
-LayoutView::active_cellview_changed (int index)
-{
-  if (m_active_cellview_changed_event_enabled) {
-
-    //  we need to cancel pending drawing or dragging operations to reflect the new cellview (different target, may have different technology etc.)
-    cancel_esc ();
-
-    //  we need to setup the editor option pages because the technology may have changed
-    dm_setup_editor_option_pages ();
-
-    active_cellview_changed_event ();
-    active_cellview_changed_with_index_event (index);
-
-    //  Because the title reflects the active one, emit a title changed event
-    if (title_string ().empty ()) {
-      emit title_changed ();
-    }
-
-  } else {
-    m_active_cellview_changed_events.insert (index);
-  }
-}
-
 void
 LayoutView::active_library_changed (int /*index*/)
 {
@@ -989,18 +913,6 @@ LayoutView::cut ()
   }
 }
 
-const lay::CellView &
-LayoutView::active_cellview () const
-{
-  return cellview ((unsigned int) active_cellview_index ());
-}
-
-lay::CellViewRef
-LayoutView::active_cellview_ref ()
-{
-  return cellview_ref ((unsigned int) active_cellview_index ());
-}
-
 int
 LayoutView::active_cellview_index () const
 {

src/laybasic/laybasic/layLayoutView.h

@@ -140,21 +140,6 @@ public:
    */
   virtual bool has_selection ();
 
-  /**
-   *  @brief Gets the window title of the view
-   */
-  std::string title () const;
-
-  /**
-   *  @brief Sets the window title to an explicit string
-   */
-  void set_title (const std::string &t);
-
-  /**
-   *  @brief Resets the explicit title and enable the automatic naming
-   */
-  void reset_title ();
-
   /**
    *  @brief Display a status message
    */
@@ -179,7 +164,7 @@ public:
    *  Switches the mode on application level. Use this method to initiate
    *  a mode switch from the view.
    */
-  void switch_mode (int m);
+  virtual void switch_mode (int m);
 
   /**
    *  @brief Updates the menu for the given view
@@ -210,7 +195,10 @@ public:
    *
    *  Returns false if the layer is not a valid one.
    */
-  bool set_current_layer (unsigned int cv_index, const db::LayerProperties &properties);
+  bool set_current_layer (unsigned int cv_index, const db::LayerProperties &properties)
+  {
+    return LayoutViewBase::set_current_layer (cv_index, properties);
+  }
 
   /**
    *  @brief Sets the currently active layer
@@ -218,7 +206,7 @@ public:
    *  The active layer is the one that is active in the layer
    *  browser panel. This method will also select this layer.
    */
-  void set_current_layer (const lay::LayerPropertiesConstIterator &l);
+  virtual void set_current_layer (const lay::LayerPropertiesConstIterator &l);
 
   /**
    *  @brief Retrieve the index of the currently active layer
@@ -227,7 +215,7 @@ public:
    *  browser panel.
    *  This method returns a null iterator, if no layer is active.
    */
-  lay::LayerPropertiesConstIterator current_layer () const;
+  virtual lay::LayerPropertiesConstIterator current_layer () const;
 
   /**
    *  @brief Return the layers that are selected in the layer browser
@@ -246,16 +234,6 @@ public:
    */
   int active_cellview_index () const;
 
-  /**
-   *  @brief Get the index of the active cellview (shown in hierarchy browser)
-   */
-  const lay::CellView &active_cellview () const;
-
-  /**
-   *  @brief Gets a cellview reference to the active cellview
-   */
-  lay::CellViewRef active_cellview_ref ();
-
   /**
    *  @brief Select a certain cellview for the active one
    */
@@ -277,18 +255,6 @@ public:
    */
   void current_cell_path (int cv_index, cell_path_type &path) const;
 
-  /**
-   *  @brief Cell path of the current cell
-   *
-   *  This method version is provided for automation purposes mainly.
-   */
-  cell_path_type get_current_cell_path (int cv_index) const
-  {
-    cell_path_type r;
-    current_cell_path (cv_index, r);
-    return r;
-  }
-
   /**
    *  @brief Cell path of the current cell in the active cellview
    *
@@ -307,16 +273,6 @@ public:
    */
   virtual void set_current_cell_path (int cv_index, const cell_path_type &path);
 
-  /**
-   *  @brief Set the path to the current cell is the current cellview
-   *
-   *  This is a convenience function setting the path for the active cellview.
-   */
-  void set_current_cell_path (const cell_path_type &path)
-  {
-    set_current_cell_path (active_cellview_index (), path);
-  }
-
   /**
    *  @brief Remove unused layers
    */
@@ -496,19 +452,6 @@ public:
    */
   tl::Event hide_event;
 
-  /**
-   *  @brief An event triggered if the active cellview changes
-   *  This event is triggered after the active cellview changed.
-   */
-  tl::Event active_cellview_changed_event;
-
-  /**
-   *  @brief An event triggered if the active cellview changes
-   *  This event is triggered after the active cellview changed. The integer parameter is the index of the
-   *  new cellview.
-   */
-  tl::event<int> active_cellview_changed_with_index_event;
-
 public slots:
   /**
    *  @brief Store the current state on the "previous states" stack
@@ -705,7 +648,11 @@ public slots:
   void deactivate_all_browsers ();
 
 private slots:
-  void active_cellview_changed (int index);
+  void active_cellview_changed (int index)
+  {
+    LayoutViewBase::active_cellview_changed (index);
+  }
+
   void active_library_changed (int index);
   void side_panel_destroyed ();
 
@@ -768,8 +715,6 @@ private:
   QSpinBox *mp_min_hier_spbx;
   QSpinBox *mp_max_hier_spbx;
   BookmarkList m_bookmarks;
-  bool m_active_cellview_changed_event_enabled;
-  std::set<int> m_active_cellview_changed_events;
   bool m_always_show_source;
   bool m_always_show_ld;
   bool m_always_show_layout_index;
@@ -796,13 +741,12 @@ protected:
   virtual void do_paste ();
   virtual void begin_layer_updates ();
   virtual void ensure_layer_selected ();
-  virtual void do_set_current_layer (const lay::LayerPropertiesConstIterator &l);
   virtual void update_content_for_cv (int cv_index);
   virtual void do_set_no_stipples (bool no_stipples);
   virtual void do_set_phase (int phase);
   virtual bool set_hier_levels_basic (std::pair<int, int> l);
+  virtual void do_change_active_cellview ();
   virtual bool is_activated () const;
-  virtual void enable_active_cellview_changed_event (bool enable, bool silent = false);
 
   //  overrides Editables method to display a message
   void signal_selection_changed ();

src/laybasic/laybasic/layLayoutViewBase.cc

@@ -304,6 +304,9 @@ LayoutViewBase::init (db::Manager *mgr)
 {
   manager (mgr);
 
+  m_active_cellview_index = -1;
+  m_active_cellview_changed_event_enabled = true;
+
   m_annotation_shapes.manager (mgr);
 
   m_visibility_changed = false;
@@ -625,6 +628,58 @@ LayoutViewBase::is_dirty () const
   return m_dirty;
 }
 
+std::string
+LayoutViewBase::title () const
+{
+  if (! m_title.empty ()) {
+    return m_title;
+  } else if (cellviews () == 0) {
+    return tl::to_string (QObject::tr ("<empty>"));
+  } else {
+
+    int cv_index = active_cellview_index ();
+    if (cv_index < 0 || cv_index >= int (cellviews ())) {
+      cv_index = 0;
+    }
+
+    const lay::CellView &cv0 = cellview (cv_index);
+
+    std::string t;
+
+    t += cv0->name ();
+    if (cv0->layout ().is_valid_cell_index (cv0.cell_index ())) {
+      t += " [";
+      t += cv0->layout ().cell_name (cv0.cell_index ());
+      t += "]";
+    }
+
+    if (cellviews () > 1) {
+      t += " ...";
+    }
+
+    return t;
+
+  }
+}
+
+void
+LayoutViewBase::set_title (const std::string &t)
+{
+  if (m_title != t) {
+    m_title = t;
+    emit_title_changed ();
+  }
+}
+
+void
+LayoutViewBase::reset_title ()
+{
+  if (! m_title.empty ()) {
+    m_title = "";
+    emit_title_changed ();
+  }
+}
+
 bool 
 LayoutViewBase::configure (const std::string &name, const std::string &value)
 {
@@ -1355,6 +1410,35 @@ LayoutViewBase::rename_properties (unsigned int index, const std::string &new_na
   layer_list_changed_event (4);
 }
 
+bool
+LayoutViewBase::set_current_layer (unsigned int cv_index, const db::LayerProperties &lp)
+{
+  //  rename the ones that got shifted.
+  lay::LayerPropertiesConstIterator l = begin_layers ();
+  while (! l.at_end ()) {
+    if (l->source (true).cv_index () == int (cv_index) && l->source (true).layer_props ().log_equal (lp)) {
+      set_current_layer (l);
+      return true;
+    }
+    ++l;
+  }
+  return false;
+}
+
+void
+LayoutViewBase::set_current_layer (const lay::LayerPropertiesConstIterator &l)
+{
+  //  @@@ No checking happens
+  m_current_layer = l;
+}
+
+lay::LayerPropertiesConstIterator
+LayoutViewBase::current_layer () const
+{
+  //  @@@ No checking happens
+  return m_current_layer;
+}
+
 void
 LayoutViewBase::merge_dither_pattern (lay::LayerPropertiesList &props)
 {
@@ -1975,6 +2059,10 @@ LayoutViewBase::erase_cellview (unsigned int index)
     m_hidden_cells.erase (m_hidden_cells.begin () + index);
   }
 
+  if (m_current_cell_per_cellview.size () > index) {
+    m_current_cell_per_cellview.erase (m_current_cell_per_cellview.begin () + index);
+  }
+
   for (unsigned int lindex = 0; lindex < layer_lists (); ++lindex) {
 
     //  remove all references to the cellview
@@ -2030,6 +2118,9 @@ LayoutViewBase::clear_cellviews ()
   set_properties (lay::LayerPropertiesList ());
   m_cellviews.clear ();
 
+  m_hidden_cells.clear ();
+  m_current_cell_per_cellview.clear ();
+
   //  clear the history, store path and zoom box
   m_display_states.clear ();
   m_display_state_ptr = 0;
@@ -2312,7 +2403,7 @@ LayoutViewBase::add_new_layers (const std::vector <unsigned int> &layer_ids, int
     set_properties (new_props);
 
     if (was_empty) {
-      do_set_current_layer (new_props.begin_const_recursive ());
+      set_current_layer (new_props.begin_const_recursive ());
     }
 
   }
@@ -2601,6 +2692,11 @@ LayoutViewBase::reload_layout (unsigned int cv_index)
     }
   }
 
+  //  clear the current cell (NOTE: this is for providing a cell target for some UI functions only)
+  if (m_current_cell_per_cellview.size () > cv_index) {
+    m_current_cell_per_cellview [cv_index] = cell_path_type ();
+  }
+
   //  Determine which layers to create as new layers. New layer need to be created
   //  if these have not been present in the original layout and there are no layer views
   //  referring to them.
@@ -4116,12 +4212,132 @@ LayoutViewBase::cellview_changed (unsigned int index)
   }
 }
 
+const lay::CellView &
+LayoutViewBase::active_cellview () const
+{
+  return cellview ((unsigned int) active_cellview_index ());
+}
+
+lay::CellViewRef
+LayoutViewBase::active_cellview_ref ()
+{
+  return cellview_ref ((unsigned int) active_cellview_index ());
+}
+
+int
+LayoutViewBase::active_cellview_index () const
+{
+  return m_active_cellview_index;
+}
+
 void
-LayoutViewBase::set_current_cell_path (int /*cv_index*/, const cell_path_type & /*path*/)
+LayoutViewBase::set_active_cellview_index (int index)
+{
+  if (index >= 0 && index < int (cellviews ())) {
+    if (m_active_cellview_index != index) {
+      m_active_cellview_index = index;
+      active_cellview_changed (index);
+    }
+  } else {
+    m_active_cellview_index = -1;
+  }
+}
+
+void
+LayoutViewBase::selected_cells_paths (int /*cv_index*/, std::vector<cell_path_type> & /*paths*/) const
+{
+  //  TODO: not implemented yet as there is no setter so far.
+  //  (but it is implemented in the UI version where it is bound to the hierarchy control panel)
+}
+
+void
+LayoutViewBase::current_cell_path (int cv_index, cell_path_type &path) const
+{
+  if (cv_index >= 0 && cv_index < int (m_current_cell_per_cellview.size ())) {
+    path = m_current_cell_per_cellview [cv_index];
+  } else {
+    path = cell_path_type ();
+  }
+}
+
+void
+LayoutViewBase::set_current_cell_path (int cv_index, const cell_path_type &path)
+{
+  if (cv_index >= 0) {
+    while (cv_index <= int (m_current_cell_per_cellview.size ())) {
+      m_current_cell_per_cellview.push_back (cell_path_type ());
+    }
+    m_current_cell_per_cellview [cv_index] = path;
+  }
+}
+
+void
+LayoutViewBase::do_change_active_cellview ()
 {
   //  .. nothing yet ..
 }
 
+void
+LayoutViewBase::enable_active_cellview_changed_event (bool enable, bool silent)
+{
+  if (m_active_cellview_changed_event_enabled == enable) {
+    return;
+  }
+
+  m_active_cellview_changed_event_enabled = enable;
+  if (enable) {
+
+    if (!silent && ! m_active_cellview_changed_events.empty ()) {
+
+      //  deliver stored events
+
+      //  we need to cancel pending drawing or dragging operations to reflect the new cellview (different target, may have different technology etc.)
+      cancel_esc ();
+
+      //  we need to setup the editor option pages because the technology may have changed
+      do_change_active_cellview ();
+
+      active_cellview_changed_event ();
+      for (std::set<int>::const_iterator i = m_active_cellview_changed_events.begin (); i != m_active_cellview_changed_events.end (); ++i) {
+        active_cellview_changed_with_index_event (*i);
+      }
+
+      //  Because the title reflects the active one, emit a title changed event
+      if (title_string ().empty ()) {
+        emit_title_changed ();
+      }
+
+    }
+
+  }
+
+  m_active_cellview_changed_events.clear ();
+}
+
+void
+LayoutViewBase::active_cellview_changed (int index)
+{
+  if (m_active_cellview_changed_event_enabled) {
+
+    //  we need to cancel pending drawing or dragging operations to reflect the new cellview (different target, may have different technology etc.)
+    cancel_esc ();
+
+    //  we need to setup the editor option pages because the technology may have changed
+    do_change_active_cellview ();
+
+    active_cellview_changed_event ();
+    active_cellview_changed_with_index_event (index);
+
+    //  Because the title reflects the active one, emit a title changed event
+    if (title_string ().empty ()) {
+      emit_title_changed ();
+    }
+
+  } else {
+    m_active_cellview_changed_events.insert (index);
+  }
+}
+
 void
 LayoutViewBase::select_cell_dispatch (const cell_path_type &path, int cellview_index)
 {
@@ -4781,12 +4997,6 @@ LayoutViewBase::ensure_layer_selected ()
   //  .. nothing yet ..
 }
 
-void
-LayoutViewBase::do_set_current_layer (const lay::LayerPropertiesConstIterator & /*l*/)
-{
-  //  .. nothing yet ..
-}
-
 void
 LayoutViewBase::do_set_no_stipples (bool /*no_stipples*/)
 {
@@ -4812,21 +5022,9 @@ LayoutViewBase::is_activated () const
 }
 
 void
-LayoutViewBase::switch_mode (int /*m*/)
+LayoutViewBase::switch_mode (int m)
 {
-  //  .. nothing yet ..
+  mode (m);
-}
-
-void
-LayoutViewBase::set_active_cellview_index (int /*index*/)
-{
-  //  .. nothing yet ..
-}
-
-void
-LayoutViewBase::enable_active_cellview_changed_event (bool /*enable*/, bool /*silent*/)
-{
-  //  .. nothing yet ..
 }
 
 void 

src/laybasic/laybasic/layLayoutViewBase.h

@@ -195,6 +195,22 @@ public:
    */
   ~LayoutViewBase ();
 
+  /**
+   *  @brief Gets the current mode
+   */
+  int mode () const
+  {
+    return m_mode;
+  }
+
+  /**
+   *  @brief Switches the application's mode
+   *
+   *  Switches the mode on application level. Use this method to initiate
+   *  a mode switch from the view.
+   */
+  virtual void switch_mode (int m);
+
   /**
    *  @brief Determine if there is something to copy
    *
@@ -508,6 +524,33 @@ public:
     insert_layer_list (index, LayerPropertiesList ());
   }
 
+  /**
+   *  @brief Sets the currently active layer by layer properties and cell view index
+   *
+   *  This method will look up that layer in the layer view tree and select that layer.
+   *  This method will also select this layer.
+   *
+   *  Returns false if the layer is not a valid one.
+   */
+  bool set_current_layer (unsigned int cv_index, const db::LayerProperties &properties);
+
+  /**
+   *  @brief Sets the currently active layer
+   *
+   *  The active layer is the one that is active in the layer
+   *  browser panel. This method will also select this layer.
+   */
+  virtual void set_current_layer (const lay::LayerPropertiesConstIterator &l);
+
+  /**
+   *  @brief Retrieve the index of the currently active layer
+   *
+   *  The active layer is the one that is active in the layer
+   *  browser panel.
+   *  This method returns a null iterator, if no layer is active.
+   */
+  virtual lay::LayerPropertiesConstIterator current_layer () const;
+
   /**
    *  @brief Set the custom dither pattern 
    */
@@ -1837,6 +1880,95 @@ public:
    */
   db::InstElement ascend (int cellview_index);
 
+  /**
+   *  @brief Get the index of the active cellview (shown in hierarchy browser)
+   */
+  const lay::CellView &active_cellview () const;
+
+  /**
+   *  @brief Gets a cellview reference to the active cellview
+   */
+  lay::CellViewRef active_cellview_ref ();
+
+  /**
+   *  @brief Get the index of the active cellview (shown in hierarchy browser)
+   */
+  virtual int active_cellview_index () const;
+
+  /**
+   *  @brief Select a certain cellview for the active one
+   */
+  virtual void set_active_cellview_index (int index);
+
+  /**
+   *  @brief An event triggered if the active cellview changes
+   *  This event is triggered after the active cellview changed.
+   */
+  tl::Event active_cellview_changed_event;
+
+  /**
+   *  @brief An event triggered if the active cellview changes
+   *  This event is triggered after the active cellview changed. The integer parameter is the index of the
+   *  new cellview.
+   */
+  tl::event<int> active_cellview_changed_with_index_event;
+
+  /**
+   *  @brief Cell paths of the selected cells
+   *
+   *  The current cell is the one highlighted in the browser with the focus rectangle. The
+   *  current path is returned for the cellview given by cv_index.
+   */
+  virtual void selected_cells_paths (int cv_index, std::vector<cell_path_type> &paths) const;
+
+  /**
+   *  @brief Cell path of the current cell
+   *
+   *  The current cell is the one highlighted in the browser with the focus rectangle. The
+   *  current path is returned for the cellview given by cv_index.
+   */
+  virtual void current_cell_path (int cv_index, cell_path_type &path) const;
+
+  /**
+   *  @brief Cell path of the current cell
+   *
+   *  This method version is provided for automation purposes mainly.
+   */
+  cell_path_type get_current_cell_path (int cv_index) const
+  {
+    cell_path_type r;
+    current_cell_path (cv_index, r);
+    return r;
+  }
+
+  /**
+   *  @brief Cell path of the current cell in the active cellview
+   *
+   *  This is a convenience function returning the path for the active cellview.
+   */
+  void current_cell_path (cell_path_type &path) const
+  {
+    current_cell_path (active_cellview_index (), path);
+  }
+
+  /**
+   *  @brief Set the path to the current cell
+   *
+   *  The current cell is the one highlighted in the browser with the focus rectangle. The
+   *  cell given by the path is highlighted and scrolled into view.
+   */
+  virtual void set_current_cell_path (int cv_index, const cell_path_type &path);
+
+  /**
+   *  @brief Set the path to the current cell is the current cellview
+   *
+   *  This is a convenience function setting the path for the active cellview.
+   */
+  void set_current_cell_path (const cell_path_type &path)
+  {
+    set_current_cell_path (active_cellview_index (), path);
+  }
+
   /**
    *  @brief Select a cell by path for a certain cell view and fit cell
    */
@@ -2186,6 +2318,21 @@ public:
     return mp_canvas->global_trans ();
   }
 
+  /**
+   *  @brief Gets the window title of the view
+   */
+  std::string title () const;
+
+  /**
+   *  @brief Sets the window title to an explicit string
+   */
+  void set_title (const std::string &t);
+
+  /**
+   *  @brief Resets the explicit title and enable the automatic naming
+   */
+  void reset_title ();
+
   /**
    *  @brief Removes the previous state from the stack
    */
@@ -2461,6 +2608,14 @@ private:
 
   lay::Plugin *mp_active_plugin;
 
+  int m_active_cellview_index;
+  bool m_active_cellview_changed_event_enabled;
+  std::set<int> m_active_cellview_changed_events;
+
+  lay::LayerPropertiesConstIterator m_current_layer;
+
+  std::vector<cell_path_type> m_current_cell_per_cellview;
+
   bool m_visibility_changed;
 
   tl::Clock m_clock, m_last_checked;
@@ -2500,11 +2655,6 @@ protected:
     return m_options;
   }
 
-  int mode () const
-  {
-    return m_mode;
-  }
-
   lay::Plugin *active_plugin () const
   {
     return mp_active_plugin;
@@ -2525,18 +2675,17 @@ protected:
   virtual lay::Color default_background_color ();
   virtual void do_set_background_color (lay::Color color, lay::Color contrast);
   virtual void do_paste ();
-  virtual void switch_mode (int m);
   virtual void begin_layer_updates ();
   virtual void ensure_layer_selected ();
-  virtual void do_set_current_layer (const lay::LayerPropertiesConstIterator &l);
   virtual void do_set_no_stipples (bool no_stipples);
   virtual void do_set_phase (int phase);
   virtual bool is_activated () const;
+  virtual void do_change_active_cellview ();
   virtual void update_content_for_cv (int cv_index);
-  virtual void set_active_cellview_index (int index);
-  virtual void enable_active_cellview_changed_event (bool enable, bool silent = false);
   virtual bool set_hier_levels_basic (std::pair<int, int> l);
-  virtual void set_current_cell_path (int cv_index, const cell_path_type &path);
+
+  void enable_active_cellview_changed_event (bool enable, bool silent = false);
+  void active_cellview_changed (int index);
 
   virtual void emit_edits_enabled_changed () { }
   virtual void emit_title_changed () { }

src/plugins/tools/bool/lay_plugin/layBooleanOperationsPlugin.cc

@@ -496,7 +496,9 @@ public:
 
   lay::Plugin *create_plugin (db::Manager *, lay::Dispatcher *root, lay::LayoutViewBase *view) const
   {
-    return new BooleanOperationsPlugin (root, view);
+    lay::LayoutView *lv = dynamic_cast<lay::LayoutView *> (view);
+    tl_assert (lv != 0);
+    return new BooleanOperationsPlugin (root, lv);
   }
 };
 

src/plugins/tools/diff/lay_plugin/layDiffPlugin.cc

@@ -24,6 +24,7 @@
 #include "layDispatcher.h"
 
 #include "layPlugin.h"
+#include "layLayoutView.h"
 
 namespace lay
 {
@@ -104,7 +105,9 @@ public:
 
   lay::Plugin *create_plugin (db::Manager *, lay::Dispatcher *root, lay::LayoutViewBase *view) const
   {
-    return new DiffPlugin (root, view);
+    lay::LayoutView *lv = dynamic_cast<lay::LayoutView *> (view);
+    tl_assert (lv != 0);
+    return new DiffPlugin (root, lv);
   }
 };
 

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

@@ -68,7 +68,8 @@ NetTracerDialog::NetTracerDialog (lay::Dispatcher *root, lay::LayoutView *view)
     m_marker_intensity (0),
     m_auto_color_enabled (false),
     m_auto_color_index (0),
-    m_mouse_state (0)
+    m_mouse_state (0),
+    mp_view (view)
 {
   mp_export_file_dialog = new lay::FileDialog (this, tl::to_string (QObject::tr ("Export Net")), tl::to_string (QObject::tr ("KLayout net files (*.lyn);;All files (*)")));
 

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

@@ -108,6 +108,8 @@ private:
   lay::FileDialog *mp_export_file_dialog;
   std::string m_export_file_name;
 
+  lay::LayoutView *mp_view;
+
   void commit ();
   size_t get_trace_depth ();
   void update_highlights ();
@@ -121,6 +123,11 @@ private:
   db::NetTracerNet *do_trace (const db::DBox &start_search_box, const db::DBox &stop_search_box, bool trace_path);
   bool get_net_tracer_setup (const lay::CellView &cv, db::NetTracerData &data);
   void trace_all_nets (db::LayoutToNetlist *l2ndb, const lay::CellView &cv, bool flat);
+
+  lay::LayoutView *view ()
+  {
+    return mp_view;
+  }
 };
 
 }

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

@@ -28,6 +28,7 @@
 
 #include "layConverters.h"
 #include "layCellView.h"
+#include "layLayoutView.h"
 
 #include "gsiDecl.h"
 
@@ -77,7 +78,9 @@ public:
 
   virtual lay::Plugin *create_plugin (db::Manager * /*manager*/, lay::Dispatcher *root, lay::LayoutViewBase *view) const
   {
-    return new NetTracerDialog (root, view);
+    lay::LayoutView *lv = dynamic_cast<lay::LayoutView *> (view);
+    tl_assert (lv != 0);
+    return new NetTracerDialog (root, lv);
   }
 };
 

src/plugins/tools/view_25d/lay_plugin/layD25View.cc

@@ -38,7 +38,7 @@ namespace lay
 
 const double initial_elevation = 15.0;
 
-D25View::D25View (lay::Dispatcher *root, lay::LayoutView *view)
+D25View::D25View (lay::Dispatcher *root, LayoutViewBase *view)
   : lay::Browser (root, view, "d25_view"),
     dm_rerun_macro (this, &D25View::rerun_macro),
     dm_fit (this, &D25View::fit)
@@ -94,7 +94,7 @@ D25View::D25View (lay::Dispatcher *root, lay::LayoutView *view)
   mp_ui->material_list->addAction (mp_ui->hide_selected_action);
   mp_ui->material_list->setContextMenuPolicy (Qt::ActionsContextMenu);
 
-  connect (mp_ui->material_list, SIGNAL (itemChanged (QListWidgetItem *)), this, SLOT (material_item_changed (QListWidgetItem *)));
+  connect (mp_ui->material_list, SIGNAL (itemChanged(QListWidgetItem *)), this, SLOT (material_item_changed(QListWidgetItem *)));
 }
 
 D25View::~D25View ()

src/plugins/tools/view_25d/lay_plugin/layD25View.h

@@ -57,7 +57,7 @@ class D25View
 Q_OBJECT 
 
 public:
-  D25View (lay::Dispatcher *root, lay::LayoutView *view);
+  D25View (lay::Dispatcher *root, lay::LayoutViewBase *view);
   ~D25View ();
 
   virtual void menu_activated (const std::string &symbol);

src/plugins/tools/view_25d/lay_plugin/layD25ViewWidget.cc

@@ -711,7 +711,7 @@ D25ViewWidget::finish ()
 }
 
 void
-D25ViewWidget::attach_view (LayoutView *view)
+D25ViewWidget::attach_view (LayoutViewBase *view)
 {
   mp_view = view;
 }

src/plugins/tools/view_25d/lay_plugin/layD25ViewWidget.h

@@ -57,7 +57,7 @@ namespace tl
 namespace lay
 {
 
-class LayoutView;
+class LayoutViewBase;
 class LayerPropertiesNode;
 class D25ViewWidget;
 
@@ -106,7 +106,7 @@ public:
   void mouseReleaseEvent (QMouseEvent *event);
   void mouseMoveEvent (QMouseEvent *event);
 
-  void attach_view(lay::LayoutView *view);
+  void attach_view(lay::LayoutViewBase *view);
 
   QVector3D hit_point_with_scene(const QVector3D &line_dir);
   void refresh ();
@@ -187,7 +187,7 @@ private:
   double m_scale_factor;
   double m_vscale_factor;
   QVector3D m_displacement;
-  lay::LayoutView *mp_view;
+  lay::LayoutViewBase *mp_view;
   db::DBox m_bbox;
   double m_zmin, m_zmax;
   bool m_zset;

src/plugins/tools/xor/lay_plugin/layXORPlugin.cc

@@ -26,6 +26,7 @@
 #include "layDispatcher.h"
 
 #include "layPlugin.h"
+#include "layLayoutView.h"
 
 namespace lay
 {
@@ -34,7 +35,7 @@ class XORPlugin
   : public lay::Plugin
 {
 public:
-  XORPlugin (Plugin *parent, lay::LayoutViewBase *view)
+  XORPlugin (Plugin *parent, lay::LayoutView *view)
     : lay::Plugin (parent), mp_view (view)
   {
     mp_dialog = new lay::XORToolDialog (0);
@@ -112,7 +113,9 @@ public:
 
   lay::Plugin *create_plugin (db::Manager *, lay::Dispatcher *root, lay::LayoutViewBase *view) const
   {
-    return new XORPlugin (root, view);
+    lay::LayoutView *lv = dynamic_cast<lay::LayoutView *> (view);
+    tl_assert (lv != 0);
+    return new XORPlugin (root, lv);
   }
 };
 

src/plugins/tools/xor/lay_plugin/layXORToolDialog.cc

@@ -186,7 +186,7 @@ XORToolDialog::~XORToolDialog ()
 }
 
 int 
-XORToolDialog::exec_dialog (lay::LayoutViewBase *view)
+XORToolDialog::exec_dialog (lay::LayoutView *view)
 {
   mp_view = view;
 

src/plugins/tools/xor/lay_plugin/layXORToolDialog.h

@@ -61,7 +61,7 @@ public:
   XORToolDialog (QWidget *parent);
   ~XORToolDialog ();
 
-  int exec_dialog (lay::LayoutViewBase *view);
+  int exec_dialog (lay::LayoutView *view);
 
 protected:
   void accept ();