Implemented a solution for #2180

Implements a new option to show/hide unresolved references
(ghost cells). The option is found in "Display/Cells"
in the Setup dialog and also in the View menu.

src/lay/lay/layMainWindow.cc

@@ -4489,6 +4489,7 @@ public:
     menu_entries.push_back (lay::config_menu_item ("show_markers", at, tl::to_string (QObject::tr ("Show Markers")), cfg_markers_visible, "?"));
     menu_entries.push_back (lay::config_menu_item ("show_texts", at, tl::to_string (QObject::tr ("Show Texts")), cfg_text_visible, "?"));
     menu_entries.push_back (lay::config_menu_item ("show_cell_boxes", at, tl::to_string (QObject::tr ("Show Cell Frames")), cfg_cell_box_visible, "?"));
+    menu_entries.push_back (lay::config_menu_item ("show_ghost_cells", at, tl::to_string (QObject::tr ("Show Unresolved References")), cfg_ghost_cells_visible, "?"));
     menu_entries.push_back (lay::config_menu_item ("no_stipples", at, tl::to_string (QObject::tr ("Show Layers Without Fill")), cfg_no_stipple, "?"));
     menu_entries.push_back (lay::config_menu_item ("synchronized_views", at, tl::to_string (QObject::tr ("Synchronized Views")), cfg_synchronized_views, "?"));
     menu_entries.push_back (lay::config_menu_item ("edit_top_level_selection:edit_mode", at, tl::to_string (QObject::tr ("Select Top Level Objects")), edt::cfg_edit_top_level_selection, "?"));

src/laybasic/laybasic/layLayoutViewBase.cc

@@ -343,6 +343,7 @@ LayoutViewBase::init (db::Manager *mgr)
   m_box_font = 0;
   m_min_size_for_label = 16;
   m_cell_box_visible = true;
+  m_ghost_cells_visible = true;
   m_text_visible = true;
   m_default_font_size = lay::FixedFont::default_font_size ();
   m_text_lazy_rendering = true;
@@ -958,6 +959,13 @@ LayoutViewBase::configure (const std::string &name, const std::string &value)
     cell_box_visible (flag);
     return true;
 
+  } else if (name == cfg_ghost_cells_visible) {
+
+    bool flag;
+    tl::from_string (value, flag);
+    ghost_cells_visible (flag);
+    return true;
+
   } else if (name == cfg_cell_box_color) {
 
     tl::Color color;
@@ -4328,7 +4336,7 @@ LayoutViewBase::set_view_ops ()
   }
 
   //  ghost cells
-  if (m_cell_box_visible) { // @@@
+  if (m_ghost_cells_visible) {
 
     lay::ViewOp vop, vopv;
 
@@ -5422,7 +5430,16 @@ LayoutViewBase::cell_box_visible (bool vis)
   }
 }
 
-void 
+void
+LayoutViewBase::ghost_cells_visible (bool vis)
+{
+  if (m_ghost_cells_visible != vis) {
+    m_ghost_cells_visible = vis;
+    update_content ();
+  }
+}
+
+void
 LayoutViewBase::text_font (unsigned int f)
 {
   if (m_text_font != f) {

src/laybasic/laybasic/layLayoutViewBase.h

@@ -1115,6 +1115,19 @@ public:
     return m_cell_box_visible;
   }
 
+  /**
+   *  @brief Visibility of ghost cells
+   */
+  void ghost_cells_visible (bool vis);
+
+  /**
+   *  @brief Visibility of ghost cells
+   */
+  bool ghost_cells_visible () const
+  {
+    return m_ghost_cells_visible;
+  }
+
   /**
    *  @brief Min instance label size setter
    */
@@ -2910,6 +2923,7 @@ private:
   unsigned int m_box_font;
   int m_min_size_for_label;
   bool m_cell_box_visible;
+  bool m_ghost_cells_visible;
 
   tl::Color m_marker_color;
   int m_marker_line_width;

src/laybasic/laybasic/layLayoutViewConfig.cc

@@ -59,6 +59,7 @@ public:
     options.push_back (std::pair<std::string, std::string> (cfg_cell_box_text_transform, "true"));
     options.push_back (std::pair<std::string, std::string> (cfg_cell_box_color, "auto"));
     options.push_back (std::pair<std::string, std::string> (cfg_cell_box_visible, "true"));
+    options.push_back (std::pair<std::string, std::string> (cfg_ghost_cells_visible, "true"));
     options.push_back (std::pair<std::string, std::string> (cfg_text_color, "auto"));
     options.push_back (std::pair<std::string, std::string> (cfg_text_visible, "true"));
     options.push_back (std::pair<std::string, std::string> (cfg_text_lazy_rendering, "true"));

src/laybasic/laybasic/layRedrawThreadWorker.cc

@@ -841,7 +841,7 @@ RedrawThreadWorker::draw_boxes_impl (bool drawing_context, db::cell_index_type c
     //  paint the box on this level
     draw_cell (drawing_context, level, trans, bbox, empty_cell, mp_layout->display_name (ci));
 
-  } else if (! for_ghosts && (level == m_to_level || (m_cv_index < int (m_hidden_cells.size ()) && m_hidden_cells [m_cv_index].find (ci) != m_hidden_cells [m_cv_index].end ()))) {
+  } else if (! for_ghosts && ! cell.is_ghost_cell () && (level == m_to_level || (m_cv_index < int (m_hidden_cells.size ()) && m_hidden_cells [m_cv_index].find (ci) != m_hidden_cells [m_cv_index].end ()))) {
 
     //  paint the box on this level
     draw_cell (drawing_context, level, trans, bbox, empty_cell, mp_layout->display_name (ci));
@@ -1003,7 +1003,7 @@ RedrawThreadWorker::draw_box_properties (bool drawing_context, db::cell_index_ty
 void
 RedrawThreadWorker::draw_box_properties_for_ghosts (bool drawing_context, db::cell_index_type ci, const db::CplxTrans &trans, const std::vector<db::Box> &vp, int level)
 {
-  draw_box_properties_impl (drawing_context, ci, trans, vp, level, false);
+  draw_box_properties_impl (drawing_context, ci, trans, vp, level, true);
 }
 
 void
@@ -1057,7 +1057,7 @@ RedrawThreadWorker::draw_box_properties_impl (bool drawing_context, db::cell_ind
     //  paint the box on this level
     draw_cell_properties (drawing_context, level, trans, bbox, prop_id);
 
-  } else if (! for_ghosts && (level == m_to_level || (m_cv_index < int (m_hidden_cells.size ()) && m_hidden_cells [m_cv_index].find (ci) != m_hidden_cells [m_cv_index].end ()))) {
+  } else if (! for_ghosts && ! cell.is_ghost_cell () && (level == m_to_level || (m_cv_index < int (m_hidden_cells.size ()) && m_hidden_cells [m_cv_index].find (ci) != m_hidden_cells [m_cv_index].end ()))) {
 
     //  paint the box on this level
     draw_cell_properties (drawing_context, level, trans, bbox, prop_id);

src/laybasic/laybasic/laybasicConfig.h

@@ -95,6 +95,7 @@ static const std::string cfg_cell_box_text_font ("inst-label-font");
 static const std::string cfg_cell_box_text_transform ("inst-label-transform");
 static const std::string cfg_cell_box_color ("inst-color");
 static const std::string cfg_cell_box_visible ("inst-visible");
+static const std::string cfg_ghost_cells_visible ("ghost-cells-visible");
 static const std::string cfg_text_color ("text-color");
 static const std::string cfg_text_visible ("text-visible");
 static const std::string cfg_text_lazy_rendering ("text-lazy-rendering");

src/layui/layui/LayoutViewConfigPage2a.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>631</width>
-    <height>320</height>
+    <width>656</width>
+    <height>397</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -21,13 +21,33 @@
     <number>9</number>
    </property>
    <item>
-    <widget class="QGroupBox" name="cell_group">
-     <property name="title">
+    <widget class="QCheckBox" name="cell_boxes_visible">
+     <property name="text">
       <string>Show cell boxes</string>
      </property>
-     <property name="checkable">
+     <property name="checked">
       <bool>true</bool>
      </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QCheckBox" name="ghost_cells_visible">
+     <property name="text">
+      <string>Show unresolved references (ghost cells) </string>
+     </property>
+     <property name="checked">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QGroupBox" name="cell_group">
+     <property name="title">
+      <string>Cell box appearance</string>
+     </property>
+     <property name="checkable">
+      <bool>false</bool>
+     </property>
      <layout class="QGridLayout">
       <property name="margin" stdset="0">
        <number>9</number>

src/layui/layui/layLayoutViewConfigPages.cc

@@ -207,7 +207,10 @@ LayoutViewConfigPage2a::setup (lay::Dispatcher *root)
   mp_ui->cell_xform_text_cbx->setChecked (flag);
 
   root->config_get (cfg_cell_box_visible, flag);
-  mp_ui->cell_group->setChecked (flag);
+  mp_ui->cell_boxes_visible->setChecked (flag);
+
+  root->config_get (cfg_ghost_cells_visible, flag);
+  mp_ui->ghost_cells_visible->setChecked (flag);
 
   int font = 0;
   root->config_get (cfg_cell_box_text_font, font);
@@ -247,7 +250,8 @@ LayoutViewConfigPage2a::commit (lay::Dispatcher *root)
   root->config_set (cfg_cell_box_text_transform, mp_ui->cell_xform_text_cbx->isChecked ());
   root->config_set (cfg_cell_box_text_font, mp_ui->cell_font_cb->currentIndex ());
   root->config_set (cfg_cell_box_color, mp_ui->cell_box_color_pb->get_color (), ColorConverter ());
-  root->config_set (cfg_cell_box_visible, mp_ui->cell_group->isChecked ());
+  root->config_set (cfg_cell_box_visible, mp_ui->cell_boxes_visible->isChecked ());
+  root->config_set (cfg_ghost_cells_visible, mp_ui->ghost_cells_visible->isChecked ());
 
   root->config_set (cfg_guiding_shape_visible, mp_ui->pcell_gs_group->isChecked ());
   root->config_set (cfg_guiding_shape_line_width, mp_ui->pcell_gs_lw->value ());