Implemented "cm_grid_increase" and "cm_grid_decrease"

Default key bindings are "G" for finer grid and
"Shift+G" for coarser grid.

Two more enhancements:
* The key binding merge in the config page was improved,
  so key bindings will appear in the config page before
  the configuration gets updated.
* The current grid is shown in the status bar when
  the grid is changed.

src/lay/lay/layMainConfigPages.cc

@@ -27,6 +27,7 @@
 #include "layStream.h"
 #include "layAbstractMenu.h"
 #include "layMainWindow.h"
+#include "tlLog.h"
 #include "ui_MainConfigPage.h"
 #include "ui_MainConfigPage2.h"
 #include "ui_MainConfigPage3.h"
@@ -412,15 +413,31 @@ CustomizeMenuConfigPage::apply (const std::vector<std::pair<std::string, std::st
     //  gets the current bindings and merges with the given ones
     m_current_bindings = mp_dispatcher->menu ()->get_shortcuts (false);
 
+    //  retained bindings, even if not configured
+    std::vector<std::map<std::string, std::string>::iterator> retained;
+    std::set<std::string> shortcuts;
+
+    //  initialize configured bindings, clear others (for now) and remember
     std::map<std::string, std::string> b;
     b.insert (key_bindings.begin (), key_bindings.end ());
-    for (std::map<std::string, std::string>::iterator kb = m_current_bindings.begin (); kb != m_current_bindings.end (); ++kb) {
+    for (auto kb = m_current_bindings.begin (); kb != m_current_bindings.end (); ++kb) {
       std::map<std::string, std::string>::iterator bb = b.find (kb->first);
       if (bb != b.end ()) {
         lay::Action *a = mp_dispatcher->menu ()->action (kb->first);
         kb->second = a->get_effective_shortcut_for (bb->second);
-      } else {
+        if (! kb->second.empty ()) {
-        kb->second.clear ();
+          shortcuts.insert (kb->second);
+        }
+      } else if (! kb->second.empty ()) {
+        retained.push_back (kb);
+      }
+    }
+
+    //  retain key bindings which don't conflict
+    for (auto i = retained.begin (); i != retained.end (); ++i) {
+      if (shortcuts.find ((*i)->second) != shortcuts.end ()) {
+        tl::warn << tl::sprintf (tl::to_string (tr ("Resetting key binding for '%s' (was '%s') because of conflicts")), (*i)->first, (*i)->second);
+        (*i)->second.clear ();
       }
     }
 

src/lay/lay/layMainWindow.cc

@@ -1970,6 +1970,18 @@ MainWindow::redraw ()
   }
 }
 
+void
+MainWindow::cm_grid_decrease ()
+{
+  change_grid (-1);
+}
+
+void
+MainWindow::cm_grid_increase ()
+{
+  change_grid (1);
+}
+
 void
 MainWindow::cm_cancel ()
 {
@@ -4041,6 +4053,10 @@ MainWindow::menu_activated (const std::string &symbol)
     cm_bookmark_view ();
   } else if (symbol == "cm_cancel") {
     cm_cancel ();
+  } else if (symbol == "cm_grid_decrease") {
+    cm_grid_decrease ();
+  } else if (symbol == "cm_grid_increase") {
+    cm_grid_increase ();
   } else if (symbol == "cm_save_layer_props") {
     cm_save_layer_props ();
   } else if (symbol == "cm_load_layer_props") {
@@ -4137,6 +4153,54 @@ MainWindow::menu_changed ()
   dm_do_update_menu ();
 }
 
+std::vector<double>
+MainWindow::default_grids () const
+{
+  lay::TechnologyController *tc = lay::TechnologyController::instance ();
+  if (tc && tc->active_technology ()) {
+    std::vector<double> tech_grids = tc->active_technology ()->default_grid_list ();
+    if (! tech_grids.empty ()) {
+      return tech_grids;
+    }
+  }
+
+  return m_default_grids;
+}
+
+void
+MainWindow::change_grid (int dir)
+{
+  std::vector<double> grids = default_grids ();
+  if (grids.empty ()) {
+    return;
+  }
+
+  std::sort (grids.begin (), grids.end ());
+
+  size_t i = 0;
+  for (std::vector<double>::const_iterator g = grids.begin (); g != grids.end (); ++g, ++i) {
+    if (db::coord_traits<db::DCoord>::equals (*g, m_grid_micron)) {
+      break;
+    }
+  }
+
+  if (i == grids.size ()) {
+    i = (dir > 0 ? grids.size () - 1 : 0);
+  } else {
+    if (dir > 0) {
+      if (i + 1 < grids.size ()) {
+        ++i;
+      }
+    } else if (dir < 0) {
+      if (i > 0) {
+        --i;
+      }
+    }
+  }
+
+  dispatcher ()->config_set (cfg_grid, grids [i]);
+}
+
 void
 MainWindow::do_update_grids ()
 {
@@ -4176,15 +4240,7 @@ MainWindow::do_update_menu ()
 
     m_default_grids_updated = false;
 
-    const std::vector<double> *grids = &m_default_grids;
+    std::vector<double> grids = default_grids ();
-    std::vector<double> tech_grids;
-    lay::TechnologyController *tc = lay::TechnologyController::instance ();
-    if (tc && tc->active_technology ()) {
-      tech_grids = tc->active_technology ()->default_grid_list ();
-      if (! tech_grids.empty ()) {
-        grids = &tech_grids;
-      }
-    }
 
     std::vector<std::string> group = menu ()->group ("default_grids_group");
 
@@ -4196,7 +4252,7 @@ MainWindow::do_update_menu ()
     }
 
     int i = 1;
-    for (std::vector<double>::const_iterator g = grids->begin (); g != grids->end (); ++g, ++i) {
+    for (std::vector<double>::const_iterator g = grids.begin (); g != grids.end (); ++g, ++i) {
 
       std::string name = "default_grid_" + tl::to_string (i);
 

src/lay/lay/layMainWindow.h

@@ -277,6 +277,14 @@ public:
    */
   double grid_micron () const;
 
+  /**
+   *  @brief Gets a list of the default grids
+   *
+   *  The default grids are globally defined, but may change depending on the technology
+   *  selected in the current view.
+   */
+  std::vector<double> default_grids () const;
+
   /**
    *  @brief Hierarchy level selection setter
    */
@@ -818,6 +826,8 @@ private:
   void cm_manage_bookmarks ();
   void cm_bookmark_view ();
   void cm_cancel ();
+  void cm_grid_decrease ();
+  void cm_grid_increase ();
   void cm_save_layer_props ();
   void cm_load_layer_props ();
   void cm_save_session ();
@@ -863,6 +873,8 @@ private:
   void update_tab_title (int i);
   void add_view (LayoutViewWidget *view);
 
+  void change_grid (int dir);
+
   bool can_close ();
   lay::CellViewRef create_or_load_layout (const std::string *filename, const db::LoadLayoutOptions *options, const std::string &tech, const int mode);
   int do_create_view ();

src/layui/layui/layLayoutViewFunctions.cc

@@ -2154,6 +2154,8 @@ public:
     menu_entries.push_back (lay::menu_item ("cm_sel_move_interactive", "sel_move_interactive:edit", at, tl::to_string (tr ("Move Interactive"))));
     menu_entries.push_back (lay::menu_item ("cm_select_next_item", "select_next_item:edit", at, tl::to_string (tr ("Select Next Item(Space)"))));
     menu_entries.push_back (lay::menu_item ("cm_select_next_item_add", "select_next_item_add:edit", at, tl::to_string (tr ("Select Next Item too(Shift+Space)"))));
+    menu_entries.push_back (lay::menu_item ("cm_grid_decrease", "grid_decrease:edit", at, tl::to_string (tr ("Select Finer Grid(G)"))));
+    menu_entries.push_back (lay::menu_item ("cm_grid_increase", "grid_increase:edit", at, tl::to_string (tr ("Select Coarser Grid(Shift+G)"))));
 
     at = "edit_menu.edit_options_group";
     menu_entries.push_back (lay::menu_item ("cm_undo", "undo:edit", at, tl::to_string (tr ("Undo(Ctrl+Z)"))));

src/layview/layview/layGridNet.cc

@@ -216,9 +216,21 @@ GridNet::configure (const std::string &name, const std::string &value)
     double g = 0;
     tl::from_string (value, g);
     if (fabs (g - m_grid) > 1e-6) {
+
       m_grid = g;
       need_update = true;
+
+      std::string gs;
+      if (m_grid < 0.4) {
+        //  pick nm units below 400nm
+        gs = tl::to_string (m_grid * 1000.0) + tl::to_string (QObject::tr (" nm"));
+      } else {
+        gs = tl::to_string (m_grid) + tl::to_string (QObject::tr (" um"));
+      }
+      mp_view->message (tl::sprintf (tl::to_string (tr ("Grid: %s")), gs));
+
     }
+
     taken = false; // to let others use the grid too.
 
   } else {