/[svn]/gigedit/trunk/src/gigedit/mainwindow.cpp

Diff of /gigedit/trunk/src/gigedit/mainwindow.cpp

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-revision 3344 by schoenebeck,
Wed Aug  2 10:39:46 2017 UTC
+revision 3456 by persson,
Sun Jan 27 10:07:56 2019 UTC
 Line 1
  /*
-  * Copyright (C) 2006-2017 Andreas Persson
+  * Copyright (C) 2006-2019 Andreas Persson
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
 Line 20
  #include <iostream>
  #include <cstring>
- #include <glibmmconfig.h>
+ #include "compat.h"
  // threads.h must be included first to be able to build with
  // G_DISABLE_DEPRECATED
  #if (GLIBMM_MAJOR_VERSION == 2 && GLIBMM_MINOR_VERSION == 31 && GLIBMM_MICRO_VERSION >= 2) || \
 Line 36
  #include <gtkmm/aboutdialog.h>
  #include <gtkmm/filechooserdialog.h>
  #include <gtkmm/messagedialog.h>
- #include <gtkmm/stock.h>
+ #if HAS_GTKMM_STOCK
+ # include <gtkmm/stock.h>
+ #endif
  #include <gtkmm/targetentry.h>
  #include <gtkmm/main.h>
- #include <gtkmm/toggleaction.h>
+ #if GTKMM_MAJOR_VERSION < 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION < 89)
+ # include <gtkmm/toggleaction.h>
+ #endif
  #include <gtkmm/accelmap.h>
  #if GTKMM_MAJOR_VERSION < 3
  #include "wrapLabel.hh"
-Line 49
+Line 53
  #include "compat.h"
  #include <stdio.h>
- #include <sndfile.h>
+ #ifdef LIBSNDFILE_HEADER_FILE
+ # include LIBSNDFILE_HEADER_FILE(sndfile.h)
+ #else
+ # include <sndfile.h>
+ #endif
  #include <assert.h>
  #include "mainwindow.h"
-Line 93 
 MainWindow::MainWindow() :
+Line 101 
 MainWindow::MainWindow() :
  //    set_border_width(5);
      if (!Settings::singleton()->autoRestoreWindowDimension) {
+ #if GTKMM_MAJOR_VERSION >= 3
+         set_default_size(895, 600);
+ #else
          set_default_size(800, 600);
+ #endif
          set_position(Gtk::WIN_POS_CENTER);
      }
-Line 105 
 MainWindow::MainWindow() :
+Line 117 
 MainWindow::MainWindow() :
      // m_TreeView.set_reorderable();
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+     m_TreeView.signal_button_press_event().connect(
+         sigc::mem_fun(*this, &MainWindow::on_button_release));
+ #else
      m_TreeView.signal_button_press_event().connect_notify(
          sigc::mem_fun(*this, &MainWindow::on_button_release));
+ #endif
      // Add the TreeView tab, inside a ScrolledWindow, with the button underneath:
      m_ScrolledWindow.add(m_TreeView);
-Line 119 
 MainWindow::MainWindow() :
+Line 136 
 MainWindow::MainWindow() :
      m_ScrolledWindowScripts.add(m_TreeViewScripts);
      m_ScrolledWindowScripts.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
+ #if GTKMM_MAJOR_VERSION < 3
      m_TreeViewNotebook.set_size_request(300);
+ #endif
      m_searchLabel.set_text(Glib::ustring(" ") + _("Filter:"));
      m_searchField.pack_start(m_searchLabel, Gtk::PACK_SHRINK);
-Line 143 
 MainWindow::MainWindow() :
+Line 161 
 MainWindow::MainWindow() :
          legend_hbox.add(labelLegend);
          imageNoSample.set(redDot);
+ #if HAS_GTKMM_ALIGNMENT
          imageNoSample.set_alignment(Gtk::ALIGN_END);
          labelNoSample.set_alignment(Gtk::ALIGN_START);
+ #else
+         imageNoSample.set_halign(Gtk::ALIGN_END);
+         labelNoSample.set_halign(Gtk::ALIGN_START);
+ #endif
          legend_hbox.add(imageNoSample);
          legend_hbox.add(labelNoSample);
          imageMissingSample.set(yellowDot);
+ #if HAS_GTKMM_ALIGNMENT
          imageMissingSample.set_alignment(Gtk::ALIGN_END);
          labelMissingSample.set_alignment(Gtk::ALIGN_START);
+ #else
+         imageMissingSample.set_halign(Gtk::ALIGN_END);
+         labelMissingSample.set_halign(Gtk::ALIGN_START);
+ #endif
          legend_hbox.add(imageMissingSample);
          legend_hbox.add(labelMissingSample);
          imageLooped.set(blackLoop);
+ #if HAS_GTKMM_ALIGNMENT
          imageLooped.set_alignment(Gtk::ALIGN_END);
          labelLooped.set_alignment(Gtk::ALIGN_START);
+ #else
+         imageLooped.set_halign(Gtk::ALIGN_END);
+         labelLooped.set_halign(Gtk::ALIGN_START);
+ #endif
          legend_hbox.add(imageLooped);
          legend_hbox.add(labelLooped);
          imageSomeLoops.set(grayLoop);
+ #if HAS_GTKMM_ALIGNMENT
          imageSomeLoops.set_alignment(Gtk::ALIGN_END);
          labelSomeLoops.set_alignment(Gtk::ALIGN_START);
+ #else
+         imageSomeLoops.set_halign(Gtk::ALIGN_END);
+         labelSomeLoops.set_halign(Gtk::ALIGN_START);
+ #endif
          legend_hbox.add(imageSomeLoops);
          legend_hbox.add(labelSomeLoops);
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
          legend_hbox.show_all_children();
+ #endif
      }
      dimreg_vbox.pack_start(legend_hbox, Gtk::PACK_SHRINK);
      m_HPaned.add2(dimreg_vbox);
-Line 180 
 MainWindow::MainWindow() :
+Line 220 
 MainWindow::MainWindow() :
      m_TreeViewNotebook.append_page(m_ScrolledWindow, _("Instruments"));
      m_TreeViewNotebook.append_page(m_ScrolledWindowScripts, _("Scripts"));
+ #if USE_GLIB_ACTION
+     m_actionGroup = Gio::SimpleActionGroup::create();
+     m_actionGroup->add_action(
+         "New", sigc::mem_fun(*this, &MainWindow::on_action_file_new)
+     );
+     m_actionGroup->add_action(
+         "Open", sigc::mem_fun(*this, &MainWindow::on_action_file_open)
+     );
+     m_actionGroup->add_action(
+         "Save", sigc::mem_fun(*this, &MainWindow::on_action_file_save)
+     );
+     m_actionGroup->add_action(
+         "SaveAs", sigc::mem_fun(*this, &MainWindow::on_action_file_save_as)
+     );
+     m_actionGroup->add_action(
+         "Properties", sigc::mem_fun(*this, &MainWindow::on_action_file_properties)
+     );
+     m_actionGroup->add_action(
+         "InstrProperties", sigc::mem_fun(*this, &MainWindow::show_instr_props)
+     );
+     m_actionMIDIRules = m_actionGroup->add_action(
+         "MidiRules", sigc::mem_fun(*this, &MainWindow::show_midi_rules)
+     );
+     m_actionGroup->add_action(
+         "ScriptSlots", sigc::mem_fun(*this, &MainWindow::show_script_slots)
+     );
+     m_actionGroup->add_action(
+         "Quit", sigc::mem_fun(*this, &MainWindow::on_action_quit)
+     );
+     m_actionGroup->add_action(
+         "MenuSample", sigc::mem_fun(*this, &MainWindow::show_samples_tab)
+     );
+     m_actionGroup->add_action(
+         "MenuInstrument", sigc::mem_fun(*this, &MainWindow::show_intruments_tab)
+     );
+     m_actionGroup->add_action(
+         "MenuScript", sigc::mem_fun(*this, &MainWindow::show_scripts_tab)
+     );
+ #else
      actionGroup = Gtk::ActionGroup::create();
      actionGroup->add(Gtk::Action::create("MenuFile", _("_File")));
-Line 236 
 MainWindow::MainWindow() :
+Line 315 
 MainWindow::MainWindow() :
      actionGroup->add(Gtk::Action::create("AssignScripts", _("Assign Script")));
      actionGroup->add(Gtk::Action::create("MenuEdit", _("_Edit")));
+ #endif
      const Gdk::ModifierType primaryModifierKey =
  #if defined(__APPLE__)
-Line 244 
 MainWindow::MainWindow() :
+Line 324 
 MainWindow::MainWindow() :
      Gdk::CONTROL_MASK; // Ctrl key on all other OSs
  #endif
+ #if USE_GLIB_ACTION
+     m_actionCopyDimRgn = m_actionGroup->add_action(
+         "CopyDimRgn", sigc::mem_fun(*this, &MainWindow::copy_selected_dimrgn)
+     );
+     m_actionPasteDimRgn = m_actionGroup->add_action(
+         "PasteDimRgn", sigc::mem_fun(*this, &MainWindow::paste_copied_dimrgn)
+     );
+     m_actionAdjustClipboard = m_actionGroup->add_action(
+         "AdjustClipboard", sigc::mem_fun(*this, &MainWindow::adjust_clipboard_content)
+     );
+     m_actionGroup->add_action(
+         "SelectPrevInstr", sigc::mem_fun(*this, &MainWindow::select_prev_instrument)
+     );
+     m_actionGroup->add_action(
+         "SelectNextInstr", sigc::mem_fun(*this, &MainWindow::select_next_instrument)
+     );
+     m_actionGroup->add_action(
+         "SelectPrevRegion", sigc::mem_fun(*this, &MainWindow::select_prev_region)
+     );
+     m_actionGroup->add_action(
+         "SelectNextRegion", sigc::mem_fun(*this, &MainWindow::select_next_region)
+     );
+     m_actionGroup->add_action(
+         "SelectPrevDimRgnZone", sigc::mem_fun(*this, &MainWindow::select_prev_dim_rgn_zone)
+     );
+     m_actionGroup->add_action(
+         "SelectNextDimRgnZone", sigc::mem_fun(*this, &MainWindow::select_next_dim_rgn_zone)
+     );
+     m_actionGroup->add_action(
+         "SelectPrevDimension", sigc::mem_fun(*this, &MainWindow::select_prev_dimension)
+     );
+     m_actionGroup->add_action(
+         "SelectNextDimension", sigc::mem_fun(*this, &MainWindow::select_next_dimension)
+     );
+     m_actionGroup->add_action(
+         "SelectAddPrevDimRgnZone", sigc::mem_fun(*this, &MainWindow::select_add_prev_dim_rgn_zone)
+     );
+     m_actionGroup->add_action(
+         "SelectAddNextDimRgnZone", sigc::mem_fun(*this, &MainWindow::select_add_next_dim_rgn_zone)
+     );
+ #else
      actionGroup->add(Gtk::Action::create("CopyDimRgn",
                                           _("Copy selected dimension region")),
                       Gtk::AccelKey(GDK_KEY_c, Gdk::MOD1_MASK),
-Line 308 
 MainWindow::MainWindow() :
+Line 429 
 MainWindow::MainWindow() :
                                           _("Add Next Dimension Region Zone to Selection")),
                       Gtk::AccelKey(GDK_KEY_Right, Gdk::MOD1_MASK | Gdk::SHIFT_MASK),
                       sigc::mem_fun(*this, &MainWindow::select_add_next_dim_rgn_zone));
+ #endif
+ #if USE_GLIB_ACTION
+     m_actionToggleCopySampleUnity = m_actionGroup->add_action_bool("CopySampleUnity", true);
+     m_actionToggleCopySampleTune  = m_actionGroup->add_action_bool("CopySampleTune", true);
+     m_actionToggleCopySampleLoop  = m_actionGroup->add_action_bool("CopySampleLoop", true);
+ #else
      Glib::RefPtr<Gtk::ToggleAction> toggle_action =
          Gtk::ToggleAction::create("CopySampleUnity", _("Copy Sample's _Unity Note"));
      toggle_action->set_active(true);
-Line 323 
 MainWindow::MainWindow() :
+Line 450 
 MainWindow::MainWindow() :
          Gtk::ToggleAction::create("CopySampleLoop", _("Copy Sample's _Loop Points"));
      toggle_action->set_active(true);
      actionGroup->add(toggle_action);
+ #endif
+ #if USE_GLIB_ACTION
+     m_actionToggleStatusBar =
+         m_actionGroup->add_action_bool("Statusbar", sigc::mem_fun(*this, &MainWindow::on_action_view_status_bar), true);
+     m_actionToggleRestoreWinDim =
+         m_actionGroup->add_action_bool("AutoRestoreWinDim", sigc::mem_fun(*this, &MainWindow::on_auto_restore_win_dim), Settings::singleton()->autoRestoreWindowDimension);
+     m_actionToggleShowTooltips = m_actionGroup->add_action_bool(
+         "ShowTooltips", sigc::mem_fun(*this, &MainWindow::on_action_show_tooltips),
+         Settings::singleton()->showTooltips
+     );
+     m_actionToggleSaveWithTempFile =
+         m_actionGroup->add_action_bool("SaveWithTemporaryFile", sigc::mem_fun(*this, &MainWindow::on_save_with_temporary_file), Settings::singleton()->saveWithTemporaryFile);
+     m_actionGroup->add_action("RefreshAll", sigc::mem_fun(*this, &MainWindow::on_action_refresh_all));
+ #else
      actionGroup->add(Gtk::Action::create("MenuMacro", _("_Macro")));
-Line 344 
 MainWindow::MainWindow() :
+Line 484 
 MainWindow::MainWindow() :
                           *this, &MainWindow::on_auto_restore_win_dim));
      toggle_action =
+         Gtk::ToggleAction::create("ShowTooltips", _("Tooltips for Beginners"));
+     toggle_action->set_active(Settings::singleton()->showTooltips);
+     actionGroup->add(
+         toggle_action,
+         sigc::mem_fun(*this, &MainWindow::on_action_show_tooltips)
+     );
+     toggle_action =
          Gtk::ToggleAction::create("SaveWithTemporaryFile", _("Save with _temporary file"));
      toggle_action->set_active(Settings::singleton()->saveWithTemporaryFile);
      actionGroup->add(toggle_action,
-Line 354 
 MainWindow::MainWindow() :
+Line 502 
 MainWindow::MainWindow() :
          Gtk::Action::create("RefreshAll", _("_Refresh All")),
          sigc::mem_fun(*this, &MainWindow::on_action_refresh_all)
      );
+ #endif
+ #if USE_GLIB_ACTION
+     m_actionGroup->add_action(
+         "About", sigc::mem_fun(*this, &MainWindow::on_action_help_about)
+     );
+     m_actionGroup->add_action(
+         "AddInstrument", sigc::mem_fun(*this, &MainWindow::on_action_add_instrument)
+     );
+     m_actionGroup->add_action(
+         "DupInstrument", sigc::mem_fun(*this, &MainWindow::on_action_duplicate_instrument)
+     );
+     m_actionGroup->add_action(
+         "CombInstruments", sigc::mem_fun(*this, &MainWindow::on_action_combine_instruments)
+     );
+     m_actionGroup->add_action(
+         "RemoveInstrument", sigc::mem_fun(*this, &MainWindow::on_action_remove_instrument)
+     );
+ #else
      action = Gtk::Action::create("MenuHelp", Gtk::Stock::HELP);
      actionGroup->add(Gtk::Action::create("MenuHelp",
                                           action->property_label()));
-Line 378 
 MainWindow::MainWindow() :
+Line 544 
 MainWindow::MainWindow() :
          Gtk::Action::create("RemoveInstrument", Gtk::Stock::REMOVE),
          sigc::mem_fun(*this, &MainWindow::on_action_remove_instrument)
      );
+ #endif
+ #if USE_GLIB_ACTION
+     m_actionToggleWarnOnExtensions = m_actionGroup->add_action_bool(
+         "WarnUserOnExtensions", sigc::mem_fun(*this, &MainWindow::on_action_warn_user_on_extensions),
+         Settings::singleton()->warnUserOnExtensions
+     );
+     m_actionToggleSyncSamplerSelection = m_actionGroup->add_action_bool(
+         "SyncSamplerInstrumentSelection", sigc::mem_fun(*this, &MainWindow::on_action_sync_sampler_instrument_selection),
+         Settings::singleton()->syncSamplerInstrumentSelection
+     );
+     m_actionToggleMoveRootNoteWithRegion = m_actionGroup->add_action_bool(
+         "MoveRootNoteWithRegionMoved", sigc::mem_fun(*this, &MainWindow::on_action_move_root_note_with_region_moved),
+         Settings::singleton()->moveRootNoteWithRegionMoved
+     );
+ #else
      actionGroup->add(Gtk::Action::create("MenuSettings", _("_Settings")));
      toggle_action =
-Line 405 
 MainWindow::MainWindow() :
+Line 585 
 MainWindow::MainWindow() :
          toggle_action,
          sigc::mem_fun(*this, &MainWindow::on_action_move_root_note_with_region_moved)
      );
+ #endif
+ #if USE_GLIB_ACTION
+     m_actionGroup->add_action(
+         "CombineInstruments", sigc::mem_fun(*this, &MainWindow::on_action_combine_instruments)
+     );
+     m_actionGroup->add_action(
+         "MergeFiles", sigc::mem_fun(*this, &MainWindow::on_action_merge_files)
+     );
+ #else
      actionGroup->add(Gtk::Action::create("MenuTools", _("_Tools")));
      actionGroup->add(
-Line 418 
 MainWindow::MainWindow() :
+Line 606 
 MainWindow::MainWindow() :
          Gtk::Action::create("MergeFiles", _("_Merge Files...")),
          sigc::mem_fun(*this, &MainWindow::on_action_merge_files)
      );
+ #endif
      // sample right-click popup actions
+ #if USE_GLIB_ACTION
+     m_actionSampleProperties = m_actionGroup->add_action(
+         "SampleProperties", sigc::mem_fun(*this, &MainWindow::on_action_sample_properties)
+     );
+     m_actionAddSampleGroup = m_actionGroup->add_action(
+         "AddGroup", sigc::mem_fun(*this, &MainWindow::on_action_add_group)
+     );
+     m_actionAddSample = m_actionGroup->add_action(
+         "AddSample", sigc::mem_fun(*this, &MainWindow::on_action_add_sample)
+     );
+     m_actionRemoveSample = m_actionGroup->add_action(
+         "RemoveSample", sigc::mem_fun(*this, &MainWindow::on_action_remove_sample)
+     );
+     m_actionGroup->add_action(
+         "RemoveUnusedSamples", sigc::mem_fun(*this, &MainWindow::on_action_remove_unused_samples)
+     );
+     m_actionViewSampleRefs = m_actionGroup->add_action(
+         "ShowSampleRefs", sigc::mem_fun(*this, &MainWindow::on_action_view_references)
+     );
+     m_actionReplaceSample = m_actionGroup->add_action(
+         "ReplaceSample", sigc::mem_fun(*this, &MainWindow::on_action_replace_sample)
+     );
+     m_actionGroup->add_action(
+         "ReplaceAllSamplesInAllGroups", sigc::mem_fun(*this, &MainWindow::on_action_replace_all_samples_in_all_groups)
+     );
+ #else
      actionGroup->add(
          Gtk::Action::create("SampleProperties", Gtk::Stock::PROPERTIES),
          sigc::mem_fun(*this, &MainWindow::on_action_sample_properties)
-Line 455 
 MainWindow::MainWindow() :
+Line 669 
 MainWindow::MainWindow() :
                              _("Replace All Samples in All Groups...")),
          sigc::mem_fun(*this, &MainWindow::on_action_replace_all_samples_in_all_groups)
      );
+ #endif
      // script right-click popup actions
+ #if USE_GLIB_ACTION
+     m_actionAddScriptGroup = m_actionGroup->add_action(
+         "AddScriptGroup", sigc::mem_fun(*this, &MainWindow::on_action_add_script_group)
+     );
+     m_actionAddScript = m_actionGroup->add_action(
+         "AddScript", sigc::mem_fun(*this, &MainWindow::on_action_add_script)
+     );
+     m_actionEditScript = m_actionGroup->add_action(
+         "EditScript", sigc::mem_fun(*this, &MainWindow::on_action_edit_script)
+     );
+     m_actionRemoveScript = m_actionGroup->add_action(
+         "RemoveScript", sigc::mem_fun(*this, &MainWindow::on_action_remove_script)
+     );
+ #else
      actionGroup->add(
          Gtk::Action::create("AddScriptGroup", _("Add _Group")),
          sigc::mem_fun(*this, &MainWindow::on_action_add_script_group)
-Line 473 
 MainWindow::MainWindow() :
+Line 702 
 MainWindow::MainWindow() :
          Gtk::Action::create("RemoveScript", Gtk::Stock::REMOVE),
          sigc::mem_fun(*this, &MainWindow::on_action_remove_script)
      );
+ #endif
+ #if USE_GTKMM_BUILDER
+     insert_action_group("AppMenu", m_actionGroup);
+     m_uiManager = Gtk::Builder::create();
+     Glib::ustring ui_info =
+         "<interface>"
+         "  <menubar id='MenuBar'>"
+         "    <menu id='MenuFile'>"
+         "      <attribute name='label' translatable='yes'>_File</attribute>"
+         "      <section>"
+         "        <item id='New'>"
+         "          <attribute name='label' translatable='yes'>New</attribute>"
+         "          <attribute name='action'>AppMenu.New</attribute>"
+         "        </item>"
+         "        <item id='Open'>"
+         "          <attribute name='label' translatable='yes'>Open</attribute>"
+         "          <attribute name='action'>AppMenu.Open</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <section>"
+         "        <item id='Save'>"
+         "          <attribute name='label' translatable='yes'>Save</attribute>"
+         "          <attribute name='action'>AppMenu.Save</attribute>"
+         "        </item>"
+         "        <item id='SaveAs'>"
+         "          <attribute name='label' translatable='yes'>Save As</attribute>"
+         "          <attribute name='action'>AppMenu.SaveAs</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <section>"
+         "        <item id='Properties'>"
+         "          <attribute name='label' translatable='yes'>Properties</attribute>"
+         "          <attribute name='action'>AppMenu.Properties</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <section>"
+         "        <item id='Quit'>"
+         "          <attribute name='label' translatable='yes'>Quit</attribute>"
+         "          <attribute name='action'>AppMenu.Quit</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuEdit'>"
+         "      <attribute name='label' translatable='yes'>Edit</attribute>"
+         "      <section>"
+         "        <item id='CopyDimRgn'>"
+         "          <attribute name='label' translatable='yes'>Copy Dimension Region</attribute>"
+         "          <attribute name='action'>AppMenu.CopyDimRgn</attribute>"
+         "        </item>"
+         "        <item id='AdjustClipboard'>"
+         "          <attribute name='label' translatable='yes'>Adjust Clipboard</attribute>"
+         "          <attribute name='action'>AppMenu.AdjustClipboard</attribute>"
+         "        </item>"
+         "        <item id='PasteDimRgn'>"
+         "          <attribute name='label' translatable='yes'>Paste Dimension Region</attribute>"
+         "          <attribute name='action'>AppMenu.PasteDimRgn</attribute>"
+         "        </item>"
+         "      </section>"
+         "        <item id='SelectPrevInstr'>"
+         "          <attribute name='label' translatable='yes'>Previous Instrument</attribute>"
+         "          <attribute name='action'>AppMenu.SelectPrevInstr</attribute>"
+         "        </item>"
+         "        <item id='SelectNextInstr'>"
+         "          <attribute name='label' translatable='yes'>Next Instrument</attribute>"
+         "          <attribute name='action'>AppMenu.SelectNextInstr</attribute>"
+         "        </item>"
+         "      <section>"
+         "        <item id='SelectPrevRegion'>"
+         "          <attribute name='label' translatable='yes'>Previous Region</attribute>"
+         "          <attribute name='action'>AppMenu.SelectPrevRegion</attribute>"
+         "        </item>"
+         "        <item id='SelectNextRegion'>"
+         "          <attribute name='label' translatable='yes'>Next Region</attribute>"
+         "          <attribute name='action'>AppMenu.SelectNextRegion</attribute>"
+         "        </item>"
+         "      </section>"
+         "        <item id='SelectPrevDimension'>"
+         "          <attribute name='label' translatable='yes'>Previous Dimension</attribute>"
+         "          <attribute name='action'>AppMenu.SelectPrevDimension</attribute>"
+         "        </item>"
+         "        <item id='SelectNextDimension'>"
+         "          <attribute name='label' translatable='yes'>Next Dimension</attribute>"
+         "          <attribute name='action'>AppMenu.SelectNextDimension</attribute>"
+         "        </item>"
+         "        <item id='SelectPrevDimRgnZone'>"
+         "          <attribute name='label' translatable='yes'>Previous Dimension Region Zone</attribute>"
+         "          <attribute name='action'>AppMenu.SelectPrevDimRgnZone</attribute>"
+         "        </item>"
+         "        <item id='SelectNextDimRgnZone'>"
+         "          <attribute name='label' translatable='yes'>Next Dimension Region Zone</attribute>"
+         "          <attribute name='action'>AppMenu.SelectNextDimRgnZone</attribute>"
+         "        </item>"
+         "        <item id='SelectAddPrevDimRgnZone'>"
+         "          <attribute name='label' translatable='yes'>Add Previous Dimension Region Zone</attribute>"
+         "          <attribute name='action'>AppMenu.SelectAddPrevDimRgnZone</attribute>"
+         "        </item>"
+         "        <item id='SelectAddNextDimRgnZone'>"
+         "          <attribute name='label' translatable='yes'>Add Next Dimension Region Zone</attribute>"
+         "          <attribute name='action'>AppMenu.SelectAddNextDimRgnZone</attribute>"
+         "        </item>"
+         "      <section>"
+         "        <item id='CopySampleUnity'>"
+         "          <attribute name='label' translatable='yes'>Copy Sample Unity</attribute>"
+         "          <attribute name='action'>AppMenu.CopySampleUnity</attribute>"
+         "        </item>"
+         "        <item id='CopySampleTune'>"
+         "          <attribute name='label' translatable='yes'>Copy Sample Tune</attribute>"
+         "          <attribute name='action'>AppMenu.CopySampleTune</attribute>"
+         "        </item>"
+         "        <item id='CopySampleLoop'>"
+         "          <attribute name='label' translatable='yes'>Copy Sample Loop</attribute>"
+         "          <attribute name='action'>AppMenu.CopySampleLoop</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuMacro'>"
+         "      <attribute name='label' translatable='yes'>Macro</attribute>"
+         "      <section>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuSample'>"
+         "      <attribute name='label' translatable='yes'>Sample</attribute>"
+         "      <section>"
+         "        <item id='SampleProperties'>"
+         "          <attribute name='label' translatable='yes'>Properties</attribute>"
+         "          <attribute name='action'>AppMenu.SampleProperties</attribute>"
+         "        </item>"
+         "        <item id='AddGroup'>"
+         "          <attribute name='label' translatable='yes'>Add Group</attribute>"
+         "          <attribute name='action'>AppMenu.AddGroup</attribute>"
+         "        </item>"
+         "        <item id='AddSample'>"
+         "          <attribute name='label' translatable='yes'>Add Sample</attribute>"
+         "          <attribute name='action'>AppMenu.AddSample</attribute>"
+         "        </item>"
+         "        <item id='ShowSampleRefs'>"
+         "          <attribute name='label' translatable='yes'>Show Sample References</attribute>"
+         "          <attribute name='action'>AppMenu.ShowSampleRefs</attribute>"
+         "        </item>"
+         "        <item id='ReplaceSample'>"
+         "          <attribute name='label' translatable='yes'>Replace Sample</attribute>"
+         "          <attribute name='action'>AppMenu.ReplaceSample</attribute>"
+         "        </item>"
+         "        <item id='ReplaceAllSamplesInAllGroups'>"
+         "          <attribute name='label' translatable='yes'>Replace all Samples in all Groups</attribute>"
+         "          <attribute name='action'>AppMenu.ReplaceAllSamplesInAllGroups</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <section>"
+         "        <item id='RemoveSample'>"
+         "          <attribute name='label' translatable='yes'>Remove Sample</attribute>"
+         "          <attribute name='action'>AppMenu.RemoveSample</attribute>"
+         "        </item>"
+         "        <item id='RemoveUnusedSamples'>"
+         "          <attribute name='label' translatable='yes'>Remove unused Samples</attribute>"
+         "          <attribute name='action'>AppMenu.RemoveUnusedSamples</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuInstrument'>"
+         "      <attribute name='label' translatable='yes'>Instrument</attribute>"
+         "      <section>"
+         "        <item id='InstrProperties'>"
+         "          <attribute name='label' translatable='yes'>Properties</attribute>"
+         "          <attribute name='action'>AppMenu.InstrProperties</attribute>"
+         "        </item>"
+         "        <item id='MidiRules'>"
+         "          <attribute name='label' translatable='yes'>MIDI Rules</attribute>"
+         "          <attribute name='action'>AppMenu.MidiRules</attribute>"
+         "        </item>"
+         "        <item id='ScriptSlots'>"
+         "          <attribute name='label' translatable='yes'>Script Slots</attribute>"
+         "          <attribute name='action'>AppMenu.ScriptSlots</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <submenu id='AssignScripts'>"
+         "        <attribute name='label' translatable='yes'>Assign Scripts</attribute>"
+         "      </submenu>"
+         "      <section>"
+         "        <item id='AddInstrument'>"
+         "          <attribute name='label' translatable='yes'>Add Instrument</attribute>"
+         "          <attribute name='action'>AppMenu.AddInstrument</attribute>"
+         "        </item>"
+         "        <item id='DupInstrument'>"
+         "          <attribute name='label' translatable='yes'>Duplicate Instrument</attribute>"
+         "          <attribute name='action'>AppMenu.DupInstrument</attribute>"
+         "        </item>"
+         "        <item id='CombInstruments'>"
+         "          <attribute name='label' translatable='yes'>Combine Instrument</attribute>"
+         "          <attribute name='action'>AppMenu.CombInstruments</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <section>"
+         "        <item id='RemoveInstrument'>"
+         "          <attribute name='label' translatable='yes'>Remove Instrument</attribute>"
+         "          <attribute name='action'>AppMenu.RemoveInstrument</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuScript'>"
+         "      <attribute name='label' translatable='yes'>Script</attribute>"
+         "      <section>"
+         "        <item id='AddScriptGroup'>"
+         "          <attribute name='label' translatable='yes'>Add Script Group</attribute>"
+         "          <attribute name='action'>AppMenu.AddScriptGroup</attribute>"
+         "        </item>"
+         "        <item id='AddScript'>"
+         "          <attribute name='label' translatable='yes'>Add Script</attribute>"
+         "          <attribute name='action'>AppMenu.AddScript</attribute>"
+         "        </item>"
+         "        <item id='EditScript'>"
+         "          <attribute name='label' translatable='yes'>Edit Script</attribute>"
+         "          <attribute name='action'>AppMenu.EditScript</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <section>"
+         "        <item id='RemoveScript'>"
+         "          <attribute name='label' translatable='yes'>Remove Script</attribute>"
+         "          <attribute name='action'>AppMenu.RemoveScript</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuView'>"
+         "      <attribute name='label' translatable='yes'>View</attribute>"
+         "      <section>"
+         "        <item id='Statusbar'>"
+         "          <attribute name='label' translatable='yes'>Statusbar</attribute>"
+         "          <attribute name='action'>AppMenu.Statusbar</attribute>"
+         "        </item>"
+         "        <item id='ShowTooltips'>"
+         "          <attribute name='label' translatable='yes'>Tooltips for Beginners</attribute>"
+         "          <attribute name='action'>AppMenu.ShowTooltips</attribute>"
+         "        </item>"
+         "        <item id='AutoRestoreWinDim'>"
+         "          <attribute name='label' translatable='yes'>Auto restore Window Dimensions</attribute>"
+         "          <attribute name='action'>AppMenu.AutoRestoreWinDim</attribute>"
+         "        </item>"
+         "      </section>"
+         "      <section>"
+         "        <item id='RefreshAll'>"
+         "          <attribute name='label' translatable='yes'>Refresh All</attribute>"
+         "          <attribute name='action'>AppMenu.RefreshAll</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuTools'>"
+         "      <attribute name='label' translatable='yes'>Tools</attribute>"
+         "      <section>"
+         "        <item id='CombineInstruments'>"
+         "          <attribute name='label' translatable='yes'>Combine Instruments ...</attribute>"
+         "          <attribute name='action'>AppMenu.CombineInstruments</attribute>"
+         "        </item>"
+         "        <item id='MergeFiles'>"
+         "          <attribute name='label' translatable='yes'>Merge Files ...</attribute>"
+         "          <attribute name='action'>AppMenu.MergeFiles</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuSettings'>"
+         "      <attribute name='label' translatable='yes'>Settings</attribute>"
+         "      <section>"
+         "        <item id='WarnUserOnExtensions'>"
+         "          <attribute name='label' translatable='yes'>Warning on Format Extensions</attribute>"
+         "          <attribute name='action'>AppMenu.WarnUserOnExtensions</attribute>"
+         "        </item>"
+         "        <item id='SyncSamplerInstrumentSelection'>"
+         "          <attribute name='label' translatable='yes'>Synchronize Sampler Selection</attribute>"
+         "          <attribute name='action'>AppMenu.SyncSamplerInstrumentSelection</attribute>"
+         "        </item>"
+         "        <item id='MoveRootNoteWithRegionMoved'>"
+         "          <attribute name='label' translatable='yes'>Move Root Note with Region moved</attribute>"
+         "          <attribute name='action'>AppMenu.MoveRootNoteWithRegionMoved</attribute>"
+         "        </item>"
+         "        <item id='SaveWithTemporaryFile'>"
+         "          <attribute name='label' translatable='yes'>Save with temporary file</attribute>"
+         "          <attribute name='action'>AppMenu.SaveWithTemporaryFile</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "    <menu id='MenuHelp'>"
+         "      <attribute name='label' translatable='yes'>Help</attribute>"
+         "      <section>"
+         "        <item id='About'>"
+         "          <attribute name='label' translatable='yes'>About ...</attribute>"
+         "          <attribute name='action'>AppMenu.About</attribute>"
+         "        </item>"
+         "      </section>"
+         "    </menu>"
+         "  </menubar>"
+         // popups
+         "  <menu id='PopupMenu'>"
+         "    <section>"
+         "      <item id='InstrProperties'>"
+         "        <attribute name='label' translatable='yes'>Instrument Properties</attribute>"
+         "        <attribute name='action'>AppMenu.InstrProperties</attribute>"
+         "      </item>"
+         "      <item id='MidiRules'>"
+         "        <attribute name='label' translatable='yes'>MIDI Rules</attribute>"
+         "        <attribute name='action'>AppMenu.MidiRules</attribute>"
+         "      </item>"
+         "      <item id='ScriptSlots'>"
+         "        <attribute name='label' translatable='yes'>Script Slots</attribute>"
+         "        <attribute name='action'>AppMenu.ScriptSlots</attribute>"
+         "      </item>"
+         "      <item id='AddInstrument'>"
+         "        <attribute name='label' translatable='yes'>Add Instrument</attribute>"
+         "        <attribute name='action'>AppMenu.AddInstrument</attribute>"
+         "      </item>"
+         "      <item id='DupInstrument'>"
+         "        <attribute name='label' translatable='yes'>Duplicate Instrument</attribute>"
+         "        <attribute name='action'>AppMenu.DupInstrument</attribute>"
+         "      </item>"
+         "      <item id='CombInstruments'>"
+         "        <attribute name='label' translatable='yes'>Combine Instruments</attribute>"
+         "        <attribute name='action'>AppMenu.CombInstruments</attribute>"
+         "      </item>"
+         "    </section>"
+         "    <section>"
+         "      <item id='RemoveInstrument'>"
+         "        <attribute name='label' translatable='yes'>Remove Instruments</attribute>"
+         "        <attribute name='action'>AppMenu.RemoveInstrument</attribute>"
+         "      </item>"
+         "    </section>"
+         "  </menu>"
+         "  <menu id='SamplePopupMenu'>"
+         "    <section>"
+         "      <item id='SampleProperties'>"
+         "        <attribute name='label' translatable='yes'>Sample Properties</attribute>"
+         "        <attribute name='action'>AppMenu.SampleProperties</attribute>"
+         "      </item>"
+         "      <item id='AddGroup'>"
+         "        <attribute name='label' translatable='yes'>Add Sample Group</attribute>"
+         "        <attribute name='action'>AppMenu.AddGroup</attribute>"
+         "      </item>"
+         "      <item id='AddSample'>"
+         "        <attribute name='label' translatable='yes'>Add Sample</attribute>"
+         "        <attribute name='action'>AppMenu.AddSample</attribute>"
+         "      </item>"
+         "      <item id='ShowSampleRefs'>"
+         "        <attribute name='label' translatable='yes'>Show Sample References ...</attribute>"
+         "        <attribute name='action'>AppMenu.ShowSampleRefs</attribute>"
+         "      </item>"
+         "      <item id='ReplaceSample'>"
+         "        <attribute name='label' translatable='yes'>Replace Sample</attribute>"
+         "        <attribute name='action'>AppMenu.ReplaceSample</attribute>"
+         "      </item>"
+         "      <item id='ReplaceAllSamplesInAllGroups'>"
+         "        <attribute name='label' translatable='yes'>Replace all Samples ...</attribute>"
+         "        <attribute name='action'>AppMenu.ReplaceAllSamplesInAllGroups</attribute>"
+         "      </item>"
+         "    </section>"
+         "    <section>"
+         "      <item id='RemoveSample'>"
+         "        <attribute name='label' translatable='yes'>Remove Sample</attribute>"
+         "        <attribute name='action'>AppMenu.RemoveSample</attribute>"
+         "      </item>"
+         "      <item id='RemoveUnusedSamples'>"
+         "        <attribute name='label' translatable='yes'>Remove unused Samples</attribute>"
+         "        <attribute name='action'>AppMenu.RemoveUnusedSamples</attribute>"
+         "      </item>"
+         "    </section>"
+         "  </menu>"
+         "  <menu id='ScriptPopupMenu'>"
+         "    <section>"
+         "      <item id='AddScriptGroup'>"
+         "        <attribute name='label' translatable='yes'>Add Script Group</attribute>"
+         "        <attribute name='action'>AppMenu.AddScriptGroup</attribute>"
+         "      </item>"
+         "      <item id='AddScript'>"
+         "        <attribute name='label' translatable='yes'>Add Script</attribute>"
+         "        <attribute name='action'>AppMenu.AddScript</attribute>"
+         "      </item>"
+         "      <item id='EditScript'>"
+         "        <attribute name='label' translatable='yes'>Edit Script</attribute>"
+         "        <attribute name='action'>AppMenu.EditScript</attribute>"
+         "      </item>"
+         "    </section>"
+         "    <section>"
+         "      <item id='RemoveScript'>"
+         "        <attribute name='label' translatable='yes'>Remove Script</attribute>"
+         "        <attribute name='action'>AppMenu.RemoveScript</attribute>"
+         "      </item>"
+         "    </section>"
+         "  </menu>"
+         "</interface>";
+     m_uiManager->add_from_string(ui_info);
+ #else
      uiManager = Gtk::UIManager::create();
      uiManager->insert_action_group(actionGroup);
      add_accel_group(uiManager->get_accel_group());
-Line 550 
 MainWindow::MainWindow() :
+Line 1167 
 MainWindow::MainWindow() :
          "    </menu>"
          "    <menu action='MenuView'>"
          "      <menuitem action='Statusbar'/>"
+         "      <menuitem action='ShowTooltips'/>"
          "      <menuitem action='AutoRestoreWinDim'/>"
          "      <separator/>"
          "      <menuitem action='RefreshAll'/>"
-Line 598 
 MainWindow::MainWindow() :
+Line 1216 
 MainWindow::MainWindow() :
          "  </popup>"
          "</ui>";
      uiManager->add_ui_from_string(ui_info);
+ #endif
+ #if USE_GTKMM_BUILDER
+     popup_menu = new Gtk::Menu(
+         Glib::RefPtr<Gio::Menu>::cast_dynamic(
+             m_uiManager->get_object("PopupMenu")
+         )
+     );
+     sample_popup = new Gtk::Menu(
+         Glib::RefPtr<Gio::Menu>::cast_dynamic(
+             m_uiManager->get_object("SamplePopupMenu")
+         )
+     );
+     script_popup = new Gtk::Menu(
+         Glib::RefPtr<Gio::Menu>::cast_dynamic(
+             m_uiManager->get_object("ScriptPopupMenu")
+         )
+     );
+ #else
      popup_menu = dynamic_cast<Gtk::Menu*>(uiManager->get_widget("/PopupMenu"));
      // Set tooltips for menu items (for some reason, setting a tooltip on the
-Line 618 
 MainWindow::MainWindow() :
+Line 1254 
 MainWindow::MainWindow() :
      {
          Gtk::MenuItem* item = dynamic_cast<Gtk::MenuItem*>(
              uiManager->get_widget("/MenuBar/MenuEdit/CopySampleLoop"));
-         item->set_tooltip_text(_("Used when dragging a sample to a region's sample reference field. You may disable this for example if you want to replace an existing sample in a region with a new sample, but don't want that the region's current loop informations to be altered by this action."));
+         item->set_tooltip_text(_("Used when dragging a sample to a region's sample reference field. You may disable this for example if you want to replace an existing sample in a region with a new sample, but don't want that the region's current loop information to be altered by this action."));
      }
      {
          Gtk::MenuItem* item = dynamic_cast<Gtk::MenuItem*>(
-Line 633 
 MainWindow::MainWindow() :
+Line 1269 
 MainWindow::MainWindow() :
      {
          Gtk::MenuItem* item = dynamic_cast<Gtk::MenuItem*>(
              uiManager->get_widget("/MenuBar/MenuSettings/MoveRootNoteWithRegionMoved"));
-         item->set_tooltip_text(_("If checked, and when a region is moved by dragging it around on the virtual keyboard, the keybord position dependent pitch will move exactly with the amount of semi tones the region was moved around."));
+         item->set_tooltip_text(_("If checked, and when a region is moved by dragging it around on the virtual keyboard, the keyboard position dependent pitch will move exactly with the amount of semi tones the region was moved around."));
      }
      {
          Gtk::MenuItem* item = dynamic_cast<Gtk::MenuItem*>(
-Line 664 
 MainWindow::MainWindow() :
+Line 1300 
 MainWindow::MainWindow() :
              uiManager->get_widget("/MenuBar/MenuTools/MergeFiles"));
          item->set_tooltip_text(_("Add instruments and samples of other .gig files to this .gig file."));
      }
+ #endif
+ #if USE_GTKMM_BUILDER
+     assign_scripts_menu = new Gtk::Menu(
+         Glib::RefPtr<Gio::Menu>::cast_dynamic(
+             m_uiManager->get_object("AssignScripts")
+         )
+     );
+ #else
      instrument_menu = static_cast<Gtk::MenuItem*>(
          uiManager->get_widget("/MenuBar/MenuInstrument/AllInstruments"))->get_submenu();
      assign_scripts_menu = static_cast<Gtk::MenuItem*>(
          uiManager->get_widget("/MenuBar/MenuInstrument/AssignScripts"))->get_submenu();
+ #endif
+ #if USE_GTKMM_BUILDER
+     Gtk::Widget* menuBar = NULL;
+     m_uiManager->get_widget("MenuBar", menuBar);
+ #else
      Gtk::Widget* menuBar = uiManager->get_widget("/MenuBar");
+ #endif
      m_VBox.pack_start(*menuBar, Gtk::PACK_SHRINK);
      m_VBox.pack_start(m_HPaned);
      m_VBox.pack_start(m_RegionChooser, Gtk::PACK_SHRINK);
-Line 683 
 MainWindow::MainWindow() :
+Line 1333 
 MainWindow::MainWindow() :
      set_file_is_shared(false);
      // Status Bar:
+ #if USE_GTKMM_BOX
+ # warning No status bar layout for GTKMM 4 yet
+ #else
      m_StatusBar.pack_start(m_AttachedStateLabel, Gtk::PACK_SHRINK);
      m_StatusBar.pack_start(m_AttachedStateImage, Gtk::PACK_SHRINK);
+ #endif
      m_StatusBar.show();
      m_RegionChooser.signal_region_selected().connect(
-Line 702 
 MainWindow::MainWindow() :
+Line 1356 
 MainWindow::MainWindow() :
      m_TreeView.set_model(m_refTreeModelFilter);
      m_TreeView.get_selection()->set_mode(Gtk::SELECTION_MULTIPLE);
-     m_TreeView.set_tooltip_text(_("Right click here for actions on instruments & MIDI Rules. Drag & drop to change the order of instruments."));
+     m_TreeView.set_has_tooltip(true);
+     m_TreeView.signal_query_tooltip().connect(
+         sigc::mem_fun(*this, &MainWindow::onQueryTreeViewTooltip)
+     );
      instrument_name_connection = m_refTreeModel->signal_row_changed().connect(
          sigc::mem_fun(*this, &MainWindow::instrument_name_changed)
      );
-Line 756 
 MainWindow::MainWindow() :
+Line 1413 
 MainWindow::MainWindow() :
          );
      }
      m_TreeViewSamples.set_headers_visible(true);
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+     m_TreeViewSamples.signal_button_press_event().connect(
+         sigc::mem_fun(*this, &MainWindow::on_sample_treeview_button_release)
+     );
+ #else
      m_TreeViewSamples.signal_button_press_event().connect_notify(
          sigc::mem_fun(*this, &MainWindow::on_sample_treeview_button_release)
      );
+ #endif
      m_refSamplesTreeModel->signal_row_changed().connect(
          sigc::mem_fun(*this, &MainWindow::sample_name_changed)
      );
-Line 775 
 MainWindow::MainWindow() :
+Line 1438 
 MainWindow::MainWindow() :
      // m_TreeViewScripts.set_reorderable();
      m_TreeViewScripts.append_column_editable("Samples", m_ScriptsModel.m_col_name);
      m_TreeViewScripts.set_headers_visible(false);
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+     m_TreeViewScripts.signal_button_press_event().connect(
+         sigc::mem_fun(*this, &MainWindow::on_script_treeview_button_release)
+     );
+ #else
      m_TreeViewScripts.signal_button_press_event().connect_notify(
          sigc::mem_fun(*this, &MainWindow::on_script_treeview_button_release)
      );
+ #endif
      //FIXME: why the heck does this double click signal_row_activated() only fire while CTRL key is pressed ?
      m_TreeViewScripts.signal_row_activated().connect(
          sigc::mem_fun(*this, &MainWindow::script_double_clicked)
-Line 883 
 MainWindow::MainWindow() :
+Line 1552 
 MainWindow::MainWindow() :
      file = 0;
      file_is_changed = false;
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      show_all_children();
+ #endif
      // start with a new gig file by default
      on_action_file_new();
-Line 904 
 MainWindow::MainWindow() :
+Line 1575 
 MainWindow::MainWindow() :
      // setup macros and their keyboard accelerators
      {
+ #if USE_GTKMM_BUILDER
+         menuMacro = new Gtk::Menu(
+             Glib::RefPtr<Gio::Menu>::cast_dynamic(
+                 m_uiManager->get_object("MenuMacro")
+             )
+         );
+ #else
          Gtk::Menu* menuMacro = dynamic_cast<Gtk::MenuItem*>(
              uiManager->get_widget("/MenuBar/MenuMacro")
          )->get_submenu();
+ #endif
          const Gdk::ModifierType noModifier = (Gdk::ModifierType)0;
          Gtk::AccelMap::add_entry("<Macros>/macro_0", GDK_KEY_F1, noModifier);
-Line 921 
 MainWindow::MainWindow() :
+Line 1600 
 MainWindow::MainWindow() :
          Gtk::AccelMap::add_entry("<Macros>/macro_9", GDK_KEY_F10, noModifier);
          Gtk::AccelMap::add_entry("<Macros>/macro_10", GDK_KEY_F11, noModifier);
          Gtk::AccelMap::add_entry("<Macros>/macro_11", GDK_KEY_F12, noModifier);
+         Gtk::AccelMap::add_entry("<Macros>/macro_12", GDK_KEY_F13, noModifier);
+         Gtk::AccelMap::add_entry("<Macros>/macro_13", GDK_KEY_F14, noModifier);
+         Gtk::AccelMap::add_entry("<Macros>/macro_14", GDK_KEY_F15, noModifier);
+         Gtk::AccelMap::add_entry("<Macros>/macro_15", GDK_KEY_F16, noModifier);
+         Gtk::AccelMap::add_entry("<Macros>/macro_16", GDK_KEY_F17, noModifier);
+         Gtk::AccelMap::add_entry("<Macros>/macro_17", GDK_KEY_F18, noModifier);
+         Gtk::AccelMap::add_entry("<Macros>/macro_18", GDK_KEY_F19, noModifier);
          Gtk::AccelMap::add_entry("<Macros>/SetupMacros", 'm', primaryModifierKey);
          Glib::RefPtr<Gtk::AccelGroup> accelGroup = this->get_accel_group();
-Line 943 
 MainWindow::MainWindow() :
+Line 1629 
 MainWindow::MainWindow() :
          Gtk::AccelMap::add_entry("<Scripts>/script_9", GDK_KEY_F10, Gdk::SHIFT_MASK);
          Gtk::AccelMap::add_entry("<Scripts>/script_10", GDK_KEY_F11, Gdk::SHIFT_MASK);
          Gtk::AccelMap::add_entry("<Scripts>/script_11", GDK_KEY_F12, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/script_12", GDK_KEY_F13, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/script_13", GDK_KEY_F14, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/script_14", GDK_KEY_F15, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/script_15", GDK_KEY_F16, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/script_16", GDK_KEY_F17, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/script_17", GDK_KEY_F18, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/script_18", GDK_KEY_F19, Gdk::SHIFT_MASK);
+         Gtk::AccelMap::add_entry("<Scripts>/DropAllScriptSlots", GDK_KEY_BackSpace, Gdk::SHIFT_MASK);
          Glib::RefPtr<Gtk::AccelGroup> accelGroup = this->get_accel_group();
          assign_scripts_menu->set_accel_group(accelGroup);
      }
+     on_show_tooltips_changed();
      Glib::signal_idle().connect_once(
          sigc::mem_fun(*this, &MainWindow::bringToFront),
-Line 967 
 void MainWindow::bringToFront() {
+Line 1663 
 void MainWindow::bringToFront() {
  }
  void MainWindow::updateMacroMenu() {
+ #if !USE_GTKMM_BUILDER
      Gtk::Menu* menuMacro = dynamic_cast<Gtk::MenuItem*>(
          uiManager->get_widget("/MenuBar/MenuMacro")
      )->get_submenu();
+ #endif
      // remove all entries from "Macro" menu
      {
-Line 1027 
 void MainWindow::updateMacroMenu() {
+Line 1725 
 void MainWindow::updateMacroMenu() {
          item->set_accel_path("<Macros>/SetupMacros");
      }
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      menuMacro->show_all_children();
+ #endif
  }
  void MainWindow::onMacroSelected(int iMacro) {
-Line 1093 
 gig::Instrument* MainWindow::get_instrum
+Line 1793 
 gig::Instrument* MainWindow::get_instrum
      gig::Instrument* instrument = 0;
      std::vector<Gtk::TreeModel::Path> rows = m_TreeView.get_selection()->get_selected_rows();
      if (rows.empty()) return NULL;
-     Gtk::TreeModel::const_iterator it = m_refTreeModel->get_iter(rows[0]);
+     //NOTE: was const_iterator before, which did not compile with GTKMM4 development branch, probably going to be fixed before final GTKMM4 release though.
+     Gtk::TreeModel::iterator it = m_refTreeModel->get_iter(rows[0]);
      if (it) {
          Gtk::TreeModel::Row row = *it;
          instrument = row[m_Columns.m_col_instr];
-Line 1159 
 void MainWindow::dimreg_changed()
+Line 1860 
 void MainWindow::dimreg_changed()
  void MainWindow::on_sel_change()
  {
+ #if !USE_GTKMM_BUILDER
      // select item in instrument menu
      std::vector<Gtk::TreeModel::Path> rows = m_TreeView.get_selection()->get_selected_rows();
      if (!rows.empty()) {
-Line 1171 
 void MainWindow::on_sel_change()
+Line 1873 
 void MainWindow::on_sel_change()
              static_cast<Gtk::RadioMenuItem*>(children[index])->set_active();
          }
      }
+ #endif
      updateScriptListOfMenu();
-Line 1381 
 Glib::Dispatcher& Saver::signal_error()
+Line 2084 
 Glib::Dispatcher& Saver::signal_error()
  ProgressDialog::ProgressDialog(const Glib::ustring& title, Gtk::Window& parent)
      : Gtk::Dialog(title, parent, true)
  {
+ #if USE_GTKMM_BOX
+     get_content_area()->pack_start(progressBar);
+ #else
      get_vbox()->pack_start(progressBar);
+ #endif
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      show_all_children();
+ #endif
      resize(600,50);
  }
-Line 1395 
 void MainWindow::__clear() {
+Line 2104 
 void MainWindow::__clear() {
      m_refTreeModel->clear();
      m_refSamplesTreeModel->clear();
      m_refScriptsTreeModel->clear();
+ #if !USE_GTKMM_BUILDER
      // remove all entries from "Instrument" menu
      while (!instrument_menu->get_children().empty()) {
          remove_instrument_from_menu(0);
      }
+ #endif
      // free libgig's gig::File instance
      if (file && !file_is_shared) delete file;
      file = NULL;
-Line 1410 
 void MainWindow::__refreshEntireGUI() {
+Line 2121 
 void MainWindow::__refreshEntireGUI() {
      m_refTreeModel->clear();
      m_refSamplesTreeModel->clear();
      m_refScriptsTreeModel->clear();
+ #if !USE_GTKMM_BUILDER
      // remove all entries from "Instrument" menu
      while (!instrument_menu->get_children().empty()) {
          remove_instrument_from_menu(0);
      }
+ #endif
      if (!this->file) return;
-Line 1447 
 bool MainWindow::close_confirmation_dial
+Line 2160 
 bool MainWindow::close_confirmation_dial
      g_free(msg);
      dialog.set_secondary_text(_("If you close without saving, your changes will be lost."));
      dialog.add_button(_("Close _Without Saving"), Gtk::RESPONSE_NO);
+ #if HAS_GTKMM_STOCK
      dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
      dialog.add_button(file_has_name ? Gtk::Stock::SAVE : Gtk::Stock::SAVE_AS, Gtk::RESPONSE_YES);
+ #else
+     dialog.add_button(_("_OK"), Gtk::RESPONSE_OK);
+     dialog.add_button(_("_Cancel"), Gtk::RESPONSE_CANCEL);
+ #endif
      dialog.set_default_response(Gtk::RESPONSE_YES);
      int response = dialog.run();
      dialog.hide();
-Line 1479 
 bool MainWindow::leaving_shared_mode_dia
+Line 2197 
 bool MainWindow::leaving_shared_mode_dia
            "used by the sampler until you tell the sampler explicitly to "
            "load it."));
      dialog.add_button(_("_Yes, Detach"), Gtk::RESPONSE_YES);
+ #if HAS_GTKMM_STOCK
      dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
+ #else
+     dialog.add_button(_("_Cancel"), Gtk::RESPONSE_CANCEL);
+ #endif
      dialog.set_default_response(Gtk::RESPONSE_CANCEL);
      int response = dialog.run();
      dialog.hide();
-Line 1493 
 void MainWindow::on_action_file_open()
+Line 2215 
 void MainWindow::on_action_file_open()
      if (file_is_shared && !leaving_shared_mode_dialog()) return;
      Gtk::FileChooserDialog dialog(*this, _("Open file"));
+ #if HAS_GTKMM_STOCK
      dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
      dialog.add_button(Gtk::Stock::OPEN, Gtk::RESPONSE_OK);
+ #else
+     dialog.add_button(_("_Cancel"), Gtk::RESPONSE_CANCEL);
+     dialog.add_button(_("_Open"), Gtk::RESPONSE_OK);
+ #endif
      dialog.set_default_response(Gtk::RESPONSE_OK);
  #if (GTKMM_MAJOR_VERSION == 2 && GTKMM_MINOR_VERSION < 90) || GTKMM_MAJOR_VERSION < 2
      Gtk::FileFilter filter;
-Line 1526 
 void MainWindow::load_file(const char* n
+Line 2253 
 void MainWindow::load_file(const char* n
          Glib::filename_display_basename(name) + "' ...",
          *this
      );
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      progress_dialog->show_all();
+ #endif
      loader = new Loader(name); //FIXME: memory leak!
      loader->signal_progress().connect(
          sigc::mem_fun(*this, &MainWindow::on_loader_progress));
-Line 1560 
 void MainWindow::load_instrument(gig::In
+Line 2289 
 void MainWindow::load_instrument(gig::In
              // make sure the selected item in the "instruments" tree view is
              // visible (scroll to it)
              m_TreeView.scroll_to_row(Gtk::TreePath(ToString(i)));
+ #if !USE_GTKMM_BUILDER
              // select item in instrument menu
              {
                  const std::vector<Gtk::Widget*> children =
                      instrument_menu->get_children();
                  static_cast<Gtk::RadioMenuItem*>(children[i])->set_active();
              }
+ #endif
              // update region chooser and dimension region chooser
              m_RegionChooser.set_instrument(instr);
              break;
-Line 1637 
 bool MainWindow::file_save()
+Line 2368 
 bool MainWindow::file_save()
          Glib::filename_display_basename(this->filename) + "' ...",
          *this
      );
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      progress_dialog->show_all();
+ #endif
      saver = new Saver(this->file); //FIXME: memory leak!
      saver->signal_progress().connect(
          sigc::mem_fun(*this, &MainWindow::on_saver_progress));
-Line 1690 
 void MainWindow::on_action_file_save_as(
+Line 2423 
 void MainWindow::on_action_file_save_as(
  bool MainWindow::file_save_as()
  {
      Gtk::FileChooserDialog dialog(*this, _("Save as"), Gtk::FILE_CHOOSER_ACTION_SAVE);
+ #if HAS_GTKMM_STOCK
      dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
      dialog.add_button(Gtk::Stock::SAVE, Gtk::RESPONSE_OK);
+ #else
+     dialog.add_button(_("_Cancel"), Gtk::RESPONSE_CANCEL);
+     dialog.add_button(_("_Save"), Gtk::RESPONSE_OK);
+ #endif
      dialog.set_default_response(Gtk::RESPONSE_OK);
      dialog.set_do_overwrite_confirmation();
-Line 1720 
 bool MainWindow::file_save_as()
+Line 2458 
 bool MainWindow::file_save_as()
      }
      // show warning in the dialog
-     Gtk::HBox descriptionArea;
+     HBox descriptionArea;
      descriptionArea.set_spacing(15);
      Gtk::Image warningIcon;
      warningIcon.set_from_icon_name("dialog-warning",
-Line 1741 
 bool MainWindow::file_save_as()
+Line 2479 
 bool MainWindow::file_save_as()
            "same .gig file will end up in corrupted sample wave data!\n")
      );
      descriptionArea.pack_start(description);
+ #if USE_GTKMM_BOX
+     dialog.get_content_area()->pack_start(descriptionArea, Gtk::PACK_SHRINK);
+ #else
      dialog.get_vbox()->pack_start(descriptionArea, Gtk::PACK_SHRINK);
+ #endif
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      descriptionArea.show_all();
+ #endif
      if (dialog.run() == Gtk::RESPONSE_OK) {
          std::string filename = dialog.get_filename();
-Line 1756 
 bool MainWindow::file_save_as()
+Line 2500 
 bool MainWindow::file_save_as()
              Glib::filename_display_basename(filename) + "' ...",
              *this
          );
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
          progress_dialog->show_all();
+ #endif
          saver = new Saver(file, filename); //FIXME: memory leak!
          saver->signal_progress().connect(
-Line 1880 
 void MainWindow::on_action_warn_user_on_
+Line 2626 
 void MainWindow::on_action_warn_user_on_
          !Settings::singleton()->warnUserOnExtensions;
  }
+ void MainWindow::on_action_show_tooltips() {
+     Settings::singleton()->showTooltips =
+         !Settings::singleton()->showTooltips;
+     on_show_tooltips_changed();
+ }
+ void MainWindow::on_show_tooltips_changed() {
+     const bool b = Settings::singleton()->showTooltips;
+     dimreg_label.set_has_tooltip(b);
+     dimreg_all_regions.set_has_tooltip(b);
+     dimreg_all_dimregs.set_has_tooltip(b);
+     dimreg_stereo.set_has_tooltip(b);
+     // Not doing this here, we let onQueryTreeViewTooltip() handle this per cell
+     //m_TreeView.set_has_tooltip(b);
+     m_TreeViewSamples.set_has_tooltip(b);
+     m_TreeViewScripts.set_has_tooltip(b);
+     set_has_tooltip(b);
+ }
  void MainWindow::on_action_sync_sampler_instrument_selection() {
      Settings::singleton()->syncSamplerInstrumentSelection =
          !Settings::singleton()->syncSamplerInstrumentSelection;
-Line 1899 
 void MainWindow::on_action_help_about()
+Line 2669 
 void MainWindow::on_action_help_about()
      dialog.set_name("Gigedit");
  #endif
      dialog.set_version(VERSION);
-     dialog.set_copyright("Copyright (C) 2006-2017 Andreas Persson");
+     dialog.set_copyright("Copyright (C) 2006-2019 Andreas Persson");
      const std::string sComment =
          _("Built " __DATE__ "\nUsing ") +
          ::gig::libraryName() + " " + ::gig::libraryVersion() + "\n\n" +
-Line 1937 
 PropDialog::PropDialog()
+Line 2707 
 PropDialog::PropDialog()
        eSourceForm(_("Source form")),
        eCommissioned(_("Commissioned")),
        eSubject(_("Subject")),
+ #if HAS_GTKMM_STOCK
        quitButton(Gtk::Stock::CLOSE),
+ #else
+       quitButton(_("_Close")),
+ #endif
        table(2, 1),
        m_file(NULL)
  {
-Line 1984 
 PropDialog::PropDialog()
+Line 2758 
 PropDialog::PropDialog()
      table.add(eCommissioned);
      table.add(eSubject);
+ #if USE_GTKMM_GRID
+     table.set_column_spacing(5);
+ #else
      table.set_col_spacings(5);
+ #endif
      add(vbox);
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+     table.set_margin(5);
+ #else
      table.set_border_width(5);
+ #endif
      vbox.add(table);
      vbox.pack_start(buttonBox, Gtk::PACK_SHRINK);
      buttonBox.set_layout(Gtk::BUTTONBOX_END);
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+     buttonBox.set_margin(5);
+ #else
      buttonBox.set_border_width(5);
+ #endif
      buttonBox.show();
      buttonBox.pack_start(quitButton);
      quitButton.set_can_default();
-Line 2002 
 PropDialog::PropDialog()
+Line 2789 
 PropDialog::PropDialog()
      quitButton.show();
      vbox.show();
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      show_all_children();
+ #endif
  }
  void PropDialog::set_file(gig::File* file)
-Line 2015 
 void PropDialog::set_file(gig::File* fil
+Line 2804 
 void PropDialog::set_file(gig::File* fil
      std::vector<std::string> txts;
      std::vector<int> values;
      txts.push_back(sGiga + "2"); values.push_back(2);
-     txts.push_back(sGiga + "3/v4"); values.push_back(3);
+     txts.push_back(sGiga + "3"); values.push_back(3);
-     if (major != 2 && major != 3) {
+     txts.push_back(sGiga + "4"); values.push_back(4);
+     if (major < 2 || major > 4) {
          txts.push_back(sGiga + ToString(major)); values.push_back(major);
      }
      std::vector<const char*> texts;
-Line 2065 
 void InstrumentProps::set_MIDIProgram(ui
+Line 2855 
 void InstrumentProps::set_MIDIProgram(ui
  }
  InstrumentProps::InstrumentProps() :
+ #if HAS_GTKMM_STOCK
      quitButton(Gtk::Stock::CLOSE),
+ #else
+     quitButton(_("_Close")),
+ #endif
      table(2,1),
      eName(_("Name")),
      eIsDrum(_("Is drum")),
-Line 2075 
 InstrumentProps::InstrumentProps() :
+Line 2869 
 InstrumentProps::InstrumentProps() :
      eGainPlus6(_("Gain +6dB"), eAttenuation, -6),
      eEffectSend(_("Effect send"), 0, 65535),
      eFineTune(_("Fine tune"), -8400, 8400),
-     ePitchbendRange(_("Pitchbend range"), 0, 12),
+     ePitchbendRange(_("Pitchbend range"), 0, 48),
      ePianoReleaseMode(_("Piano release mode")),
      eDimensionKeyRangeLow(_("Keyswitching range low")),
      eDimensionKeyRangeHigh(_("Keyswitching range high"))
-Line 2111 
 InstrumentProps::InstrumentProps() :
+Line 2905 
 InstrumentProps::InstrumentProps() :
      eName.signal_value_changed().connect(sig_name_changed.make_slot());
+ #if USE_GTKMM_GRID
+     table.set_column_spacing(5);
+ #else
      table.set_col_spacings(5);
+ #endif
      table.add(eName);
      table.add(eIsDrum);
-Line 2127 
 InstrumentProps::InstrumentProps() :
+Line 2925 
 InstrumentProps::InstrumentProps() :
      table.add(eDimensionKeyRangeHigh);
      add(vbox);
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+     table.set_margin(5);
+ #else
      table.set_border_width(5);
+ #endif
      vbox.pack_start(table);
      table.show();
      vbox.pack_start(buttonBox, Gtk::PACK_SHRINK);
      buttonBox.set_layout(Gtk::BUTTONBOX_END);
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+     buttonBox.set_margin(5);
+ #else
      buttonBox.set_border_width(5);
+ #endif
      buttonBox.show();
      buttonBox.pack_start(quitButton);
      quitButton.set_can_default();
-Line 2143 
 InstrumentProps::InstrumentProps() :
+Line 2949 
 InstrumentProps::InstrumentProps() :
      quitButton.show();
      vbox.show();
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      show_all_children();
+ #endif
  }
  void InstrumentProps::set_instrument(gig::Instrument* instrument)
-Line 2188 
 void MainWindow::updateSampleRefCountMap
+Line 2996 
 void MainWindow::updateSampleRefCountMap
      }
  }
+ bool MainWindow::onQueryTreeViewTooltip(int x, int y, bool keyboardTip, const Glib::RefPtr<Gtk::Tooltip>& tooltip) {
+     Gtk::TreeModel::iterator iter;
+     m_TreeView.get_tooltip_context_iter(x, y, keyboardTip, iter);
+     Gtk::TreeModel::Path path(iter);
+     Gtk::TreeModel::Row row = *iter;
+     Gtk::TreeViewColumn* pointedColumn = NULL;
+     // resolve the precise table column the mouse points to
+     {
+         Gtk::TreeModel::Path path; // unused
+         int cellX, cellY; // unused
+         m_TreeView.get_path_at_pos(x, y, path, pointedColumn, cellX, cellY);
+     }
+     Gtk::TreeViewColumn* scriptsColumn = m_TreeView.get_column(2);
+     if (pointedColumn == scriptsColumn) { // mouse hovers scripts column ...
+         // show the script(s) assigned to the hovered instrument as tooltip
+         tooltip->set_markup( row[m_Columns.m_col_tooltip] );
+         m_TreeView.set_tooltip_cell(tooltip, &path, scriptsColumn, NULL);
+     } else {
+         // if beginners' tooltips is disabled then don't show the following one
+         if (!Settings::singleton()->showTooltips)
+             return false;
+         // yeah, a beginners tooltip
+         tooltip->set_text(_(
+             "Right click here for actions on instruments & MIDI Rules. "
+             "Drag & drop to change the order of instruments."
+         ));
+         m_TreeView.set_tooltip_cell(tooltip, &path, pointedColumn, NULL);
+     }
+     return true;
+ }
+ static Glib::ustring scriptTooltipFor(gig::Instrument* instrument, int index) {
+     Glib::ustring name(gig_to_utf8(instrument->pInfo->Name));
+     const int iScriptSlots = instrument->ScriptSlotCount();
+     Glib::ustring tooltip = "<u>(" + ToString(index) + ") „"  + name + "”</u>\n\n";
+     if (!iScriptSlots)
+         tooltip += "<span foreground='red'><i>No script assigned</i></span>";
+     else {
+         for (int i = 0; i < iScriptSlots; ++i) {
+             tooltip += "• " + ToString(i+1) + ". Script:  „<span foreground='#46DEFF'><b>" +
+                        instrument->GetScriptOfSlot(i)->Name + "</b></span>”";
+             if (i + 1 < iScriptSlots) tooltip += "\n\n";
+         }
+     }
+     return tooltip;
+ }
  void MainWindow::load_gig(gig::File* gig, const char* filename, bool isSharedInstrument)
  {
      file = 0;
-Line 2217 
 void MainWindow::load_gig(gig::File* gig
+Line 3072 
 void MainWindow::load_gig(gig::File* gig
          row[m_Columns.m_col_name] = name;
          row[m_Columns.m_col_instr] = instrument;
          row[m_Columns.m_col_scripts] = iScriptSlots ? ToString(iScriptSlots) : "";
+         row[m_Columns.m_col_tooltip] = scriptTooltipFor(instrument, index);
+ #if !USE_GTKMM_BUILDER
          add_instrument_to_menu(name);
+ #endif
      }
      instrument_name_connection.unblock();
+ #if !USE_GTKMM_BUILDER
      uiManager->get_widget("/MenuBar/MenuInstrument/AllInstruments")->show();
+ #endif
      updateSampleRefCountMap(gig);
-Line 2292 
 bool MainWindow::instr_props_set_instrum
+Line 3152 
 bool MainWindow::instr_props_set_instrum
          instrumentProps.hide();
          return false;
      }
-     Gtk::TreeModel::const_iterator it = m_refTreeModel->get_iter(rows[0]);
+     //NOTE: was const_iterator before, which did not compile with GTKMM4 development branch, probably going to be fixed before final GTKMM4 release though.
+     Gtk::TreeModel::iterator it = m_refTreeModel->get_iter(rows[0]);
      if (it) {
          Gtk::TreeModel::Row row = *it;
          gig::Instrument* instrument = row[m_Columns.m_col_instr];
-Line 2309 
 bool MainWindow::instr_props_set_instrum
+Line 3170 
 bool MainWindow::instr_props_set_instrum
      } else {
          instrumentProps.hide();
      }
-     return it;
+     //NOTE: explicit boolean cast required for GTKMM4 development branch here
+     return it ? true : false;
  }
  void MainWindow::show_instr_props()
-Line 2328 
 void MainWindow::instr_name_changed_by_i
+Line 3190 
 void MainWindow::instr_name_changed_by_i
      gig::Instrument* instrument = row[m_Columns.m_col_instr];
      Glib::ustring gigname(gig_to_utf8(instrument->pInfo->Name));
      if (gigname != name) {
+         Gtk::TreeModel::Path path(*it);
+         const int index = path[0];
          row[m_Columns.m_col_name] = gigname;
+         row[m_Columns.m_col_tooltip] = scriptTooltipFor(instrument, index);
      }
  }
-Line 2374 
 void MainWindow::onScriptSlotsModified(g
+Line 3239 
 void MainWindow::onScriptSlotsModified(g
          Gtk::TreeModel::Row row = model->children()[i];
          if (row[m_Columns.m_col_instr] != pInstrument) continue;
          row[m_Columns.m_col_scripts] = iScriptSlots ? ToString(iScriptSlots) : "";
+         row[m_Columns.m_col_tooltip] = scriptTooltipFor(pInstrument, i);
          break;
      }
-Line 2399 
 void MainWindow::assignScript(gig::Scrip
+Line 3265 
 void MainWindow::assignScript(gig::Scrip
      onScriptSlotsModified(pInstrument);
  }
+ void MainWindow::dropAllScriptSlots() {
+     gig::Instrument* pInstrument = get_instrument();
+     if (!pInstrument) {
+         printf("!instrument\n");
+         return;
+     }
+     const int iScriptSlots = pInstrument->ScriptSlotCount();
+     for (int i = iScriptSlots - 1; i >= 0; --i)
+         pInstrument->RemoveScriptSlot(i);
+     onScriptSlotsModified(pInstrument);
+ }
  void MainWindow::on_action_refresh_all() {
      __refreshEntireGUI();
  }
  void MainWindow::on_action_view_status_bar() {
+ #if USE_GLIB_ACTION
+     bool active = false;
+     m_actionToggleStatusBar->get_state(active);
+     // for some reason toggle state does not change automatically
+     active = !active;
+     m_actionToggleStatusBar->change_state(active);
+     if (active)
+         m_StatusBar.show();
+     else
+         m_StatusBar.hide();
+ #else
      Gtk::CheckMenuItem* item =
          dynamic_cast<Gtk::CheckMenuItem*>(uiManager->get_widget("/MenuBar/MenuView/Statusbar"));
      if (!item) {
-Line 2412 
 void MainWindow::on_action_view_status_b
+Line 3303 
 void MainWindow::on_action_view_status_b
      }
      if (item->get_active()) m_StatusBar.show();
      else                    m_StatusBar.hide();
+ #endif
  }
  void MainWindow::on_auto_restore_win_dim() {
+ #if USE_GLIB_ACTION
+     bool active = false;
+     m_actionToggleRestoreWinDim->get_state(active);
+     // for some reason toggle state does not change automatically
+     active = !active;
+     m_actionToggleRestoreWinDim->change_state(active);
+     Settings::singleton()->autoRestoreWindowDimension = active;
+ #else
      Gtk::CheckMenuItem* item =
          dynamic_cast<Gtk::CheckMenuItem*>(uiManager->get_widget("/MenuBar/MenuView/AutoRestoreWinDim"));
      if (!item) {
-Line 2422 
 void MainWindow::on_auto_restore_win_dim
+Line 3322 
 void MainWindow::on_auto_restore_win_dim
          return;
      }
      Settings::singleton()->autoRestoreWindowDimension = item->get_active();
+ #endif
  }
  void MainWindow::on_save_with_temporary_file() {
+ #if USE_GLIB_ACTION
+     bool active = false;
+     m_actionToggleSaveWithTempFile->get_state(active);
+     // for some reason toggle state does not change automatically
+     active = !active;
+     m_actionToggleSaveWithTempFile->change_state(active);
+     Settings::singleton()->saveWithTemporaryFile = active;
+ #else
      Gtk::CheckMenuItem* item =
          dynamic_cast<Gtk::CheckMenuItem*>(uiManager->get_widget("/MenuBar/MenuSettings/SaveWithTemporaryFile"));
      if (!item) {
-Line 2432 
 void MainWindow::on_save_with_temporary_
+Line 3341 
 void MainWindow::on_save_with_temporary_
          return;
      }
      Settings::singleton()->saveWithTemporaryFile = item->get_active();
+ #endif
  }
  bool MainWindow::is_copy_samples_unity_note_enabled() const {
+ #if USE_GLIB_ACTION
+     bool active = false;
+     m_actionToggleCopySampleUnity->get_state(active);
+     return active;
+ #else
      Gtk::CheckMenuItem* item =
          dynamic_cast<Gtk::CheckMenuItem*>(uiManager->get_widget("/MenuBar/MenuEdit/CopySampleUnity"));
      if (!item) {
-Line 2442 
 bool MainWindow::is_copy_samples_unity_n
+Line 3357 
 bool MainWindow::is_copy_samples_unity_n
          return true;
      }
      return item->get_active();
+ #endif
  }
  bool MainWindow::is_copy_samples_fine_tune_enabled() const {
+ #if USE_GLIB_ACTION
+     bool active = false;
+     m_actionToggleCopySampleTune->get_state(active);
+     return active;
+ #else
      Gtk::CheckMenuItem* item =
          dynamic_cast<Gtk::CheckMenuItem*>(uiManager->get_widget("/MenuBar/MenuEdit/CopySampleTune"));
      if (!item) {
-Line 2452 
 bool MainWindow::is_copy_samples_fine_tu
+Line 3373 
 bool MainWindow::is_copy_samples_fine_tu
          return true;
      }
      return item->get_active();
+ #endif
  }
  bool MainWindow::is_copy_samples_loop_enabled() const {
+ #if USE_GLIB_ACTION
+     bool active = false;
+     m_actionToggleCopySampleLoop->get_state(active);
+     return active;
+ #else
      Gtk::CheckMenuItem* item =
          dynamic_cast<Gtk::CheckMenuItem*>(uiManager->get_widget("/MenuBar/MenuEdit/CopySampleLoop"));
      if (!item) {
-Line 2462 
 bool MainWindow::is_copy_samples_loop_en
+Line 3389 
 bool MainWindow::is_copy_samples_loop_en
          return true;
      }
      return item->get_active();
+ #endif
  }
- void MainWindow::on_button_release(GdkEventButton* button)
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
- {
+ bool MainWindow::on_button_release(Gdk::EventButton& _button) {
+     GdkEventButton* button = _button.gobj();
+ #else
+ void MainWindow::on_button_release(GdkEventButton* button) {
+ #endif
      if (button->type == GDK_2BUTTON_PRESS) {
          show_instr_props();
      } else if (button->type == GDK_BUTTON_PRESS && button->button == 3) {
          // gig v2 files have no midi rules
          const bool bEnabled = !(file->pVersion && file->pVersion->major == 2);
+ #if USE_GTKMM_BUILDER
+         m_actionMIDIRules->property_enabled() = bEnabled;
+ #else
          static_cast<Gtk::MenuItem*>(
              uiManager->get_widget("/MenuBar/MenuInstrument/MidiRules"))->set_sensitive(
                  bEnabled
-Line 2479 
 void MainWindow::on_button_release(GdkEv
+Line 3414 
 void MainWindow::on_button_release(GdkEv
              uiManager->get_widget("/PopupMenu/MidiRules"))->set_sensitive(
                  bEnabled
              );
+ #endif
          popup_menu->popup(button->button, button->time);
      }
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+     return false;
+ #endif
  }
+ #if !USE_GTKMM_BUILDER
  void MainWindow::on_instrument_selection_change(Gtk::RadioMenuItem* item) {
      if (item->get_active()) {
          const std::vector<Gtk::Widget*> children =
-Line 2497 
 void MainWindow::on_instrument_selection
+Line 3437 
 void MainWindow::on_instrument_selection
          }
      }
  }
+ #endif
  void MainWindow::select_instrument(gig::Instrument* instrument) {
      if (!instrument) return;
-Line 2511 
 void MainWindow::select_instrument(gig::
+Line 3452 
 void MainWindow::select_instrument(gig::
              // select and show the respective instrument in the list view
              show_intruments_tab();
              m_TreeView.get_selection()->unselect_all();
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+             auto iterSel = model->children()[i].get_iter();
+             m_TreeView.get_selection()->select(iterSel);
+ #else
              m_TreeView.get_selection()->select(model->children()[i]);
+ #endif
              std::vector<Gtk::TreeModel::Path> rows =
                  m_TreeView.get_selection()->get_selected_rows();
              if (!rows.empty())
-Line 2536 
 bool MainWindow::select_dimension_region
+Line 3483 
 bool MainWindow::select_dimension_region
              // select and show the respective instrument in the list view
              show_intruments_tab();
              m_TreeView.get_selection()->unselect_all();
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+             auto iterSel = model->children()[i].get_iter();
+             m_TreeView.get_selection()->select(iterSel);
+ #else
              m_TreeView.get_selection()->select(model->children()[i]);
+ #endif
              std::vector<Gtk::TreeModel::Path> rows =
                  m_TreeView.get_selection()->get_selected_rows();
              if (!rows.empty())
-Line 2567 
 void MainWindow::select_sample(gig::Samp
+Line 3519 
 void MainWindow::select_sample(gig::Samp
              if (rowSample[m_SamplesModel.m_col_sample] == sample) {
                  show_samples_tab();
                  m_TreeViewSamples.get_selection()->unselect_all();
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+                 auto iterSel = rowGroup.children()[s].get_iter();
+                 m_TreeViewSamples.get_selection()->select(iterSel);
+ #else
                  m_TreeViewSamples.get_selection()->select(rowGroup.children()[s]);
+ #endif
                  std::vector<Gtk::TreeModel::Path> rows =
                      m_TreeViewSamples.get_selection()->get_selected_rows();
                  if (rows.empty()) return;
-Line 2578 
 void MainWindow::select_sample(gig::Samp
+Line 3535 
 void MainWindow::select_sample(gig::Samp
      }
  }
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+ bool MainWindow::on_sample_treeview_button_release(Gdk::EventButton& _button) {
+     GdkEventButton* button = _button.gobj();
+ #else
  void MainWindow::on_sample_treeview_button_release(GdkEventButton* button) {
+ #endif
      if (button->type == GDK_BUTTON_PRESS && button->button == 3) {
          // by default if Ctrl keys is pressed down, then a mouse right-click
          // does not select the respective row, so we must assure this
-Line 2599 
 void MainWindow::on_sample_treeview_butt
+Line 3561 
 void MainWindow::on_sample_treeview_butt
              }
          }*/
+ #if !USE_GTKMM_BUILDER
          Gtk::Menu* sample_popup =
              dynamic_cast<Gtk::Menu*>(uiManager->get_widget("/SamplePopupMenu"));
+ #endif
          // update enabled/disabled state of sample popup items
          Glib::RefPtr<Gtk::TreeSelection> sel = m_TreeViewSamples.get_selection();
          std::vector<Gtk::TreeModel::Path> rows = sel->get_selected_rows();
-Line 2615 
 void MainWindow::on_sample_treeview_butt
+Line 3580 
 void MainWindow::on_sample_treeview_butt
              if (row[m_SamplesModel.m_col_sample]) nSamples++;
          }
+ #if USE_GTKMM_BUILDER
+         m_actionSampleProperties->property_enabled() = (n == 1);
+         m_actionAddSample->property_enabled() = (n);
+         m_actionAddSampleGroup->property_enabled() = (file);
+         m_actionViewSampleRefs->property_enabled() = (nSamples == 1);
+         m_actionRemoveSample->property_enabled() = (n);
+         m_actionReplaceSample->property_enabled() = (nSamples == 1);
+ #else
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/SamplePopupMenu/SampleProperties"))->
              set_sensitive(n == 1);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/SamplePopupMenu/AddSample"))->
-Line 2625 
 void MainWindow::on_sample_treeview_butt
+Line 3598 
 void MainWindow::on_sample_treeview_butt
              set_sensitive(nSamples == 1);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/SamplePopupMenu/RemoveSample"))->
              set_sensitive(n);
+ #endif
          // show sample popup
          sample_popup->popup(button->button, button->time);
+ #if !USE_GTKMM_BUILDER
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/MenuBar/MenuSample/SampleProperties"))->
              set_sensitive(n == 1);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/MenuBar/MenuSample/AddSample"))->
-Line 2638 
 void MainWindow::on_sample_treeview_butt
+Line 3613 
 void MainWindow::on_sample_treeview_butt
              set_sensitive(nSamples == 1);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/MenuBar/MenuSample/RemoveSample"))->
              set_sensitive(n);
+ #endif
      }
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+     return false;
+ #endif
  }
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+ bool MainWindow::on_script_treeview_button_release(Gdk::EventButton& _button) {
+     GdkEventButton* button = _button.gobj();
+ #else
  void MainWindow::on_script_treeview_button_release(GdkEventButton* button) {
+ #endif
      if (button->type == GDK_BUTTON_PRESS && button->button == 3) {
+ #if !USE_GTKMM_BUILDER
          Gtk::Menu* script_popup =
              dynamic_cast<Gtk::Menu*>(uiManager->get_widget("/ScriptPopupMenu"));
+ #endif
          // update enabled/disabled state of sample popup items
          Glib::RefPtr<Gtk::TreeSelection> sel = m_TreeViewScripts.get_selection();
          Gtk::TreeModel::iterator it = sel->get_selected();
-Line 2655 
 void MainWindow::on_script_treeview_butt
+Line 3642 
 void MainWindow::on_script_treeview_butt
              group_selected  = row[m_ScriptsModel.m_col_group];
              script_selected = row[m_ScriptsModel.m_col_script];
          }
+ #if USE_GTKMM_BUILDER
+         m_actionAddScript->property_enabled() = (group_selected || script_selected);
+         m_actionAddScriptGroup->property_enabled() = (file);
+         m_actionEditScript->property_enabled() = (script_selected);
+         m_actionRemoveScript->property_enabled() = (group_selected || script_selected);
+ #else
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/ScriptPopupMenu/AddScript"))->
              set_sensitive(group_selected || script_selected);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/ScriptPopupMenu/AddScriptGroup"))->
-Line 2663 
 void MainWindow::on_script_treeview_butt
+Line 3656 
 void MainWindow::on_script_treeview_butt
              set_sensitive(script_selected);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/ScriptPopupMenu/RemoveScript"))->
              set_sensitive(group_selected || script_selected);
+ #endif
          // show sample popup
          script_popup->popup(button->button, button->time);
+ #if !USE_GTKMM_BUILDER
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/MenuBar/MenuScript/AddScript"))->
              set_sensitive(group_selected || script_selected);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/MenuBar/MenuScript/AddScriptGroup"))->
-Line 2674 
 void MainWindow::on_script_treeview_butt
+Line 3669 
 void MainWindow::on_script_treeview_butt
              set_sensitive(script_selected);
          dynamic_cast<Gtk::MenuItem*>(uiManager->get_widget("/MenuBar/MenuScript/RemoveScript"))->
              set_sensitive(group_selected || script_selected);
+ #endif
      }
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+     return false;
+ #endif
  }
  void MainWindow::updateScriptListOfMenu() {
-Line 2720 
 void MainWindow::updateScriptListOfMenu(
+Line 3719 
 void MainWindow::updateScriptListOfMenu(
          assign_scripts_menu->append(*item);
      }
+     // add separator line to menu
+     assign_scripts_menu->append(*new Gtk::SeparatorMenuItem);
+     {
+         Gtk::MenuItem* item = new Gtk::MenuItem(_("Unassign All Scripts"));
+         item->signal_activate().connect(
+             sigc::mem_fun(*this, &MainWindow::dropAllScriptSlots)
+         );
+         assign_scripts_menu->append(*item);
+         item->set_accel_path("<Scripts>/DropAllScriptSlots");
+     }
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      assign_scripts_menu->show_all_children();
+ #endif
  }
+ #if !USE_GTKMM_BUILDER
  Gtk::RadioMenuItem* MainWindow::add_instrument_to_menu(
      const Glib::ustring& name, int position) {
-Line 2746 
 Gtk::RadioMenuItem* MainWindow::add_inst
+Line 3760 
 Gtk::RadioMenuItem* MainWindow::add_inst
              item));
      return item;
  }
+ #endif
+ #if !USE_GTKMM_BUILDER
  void MainWindow::remove_instrument_from_menu(int index) {
      const std::vector<Gtk::Widget*> children =
          instrument_menu->get_children();
-Line 2754 
 void MainWindow::remove_instrument_from_
+Line 3770 
 void MainWindow::remove_instrument_from_
      instrument_menu->remove(*child);
      delete child;
  }
+ #endif
  void MainWindow::add_instrument(gig::Instrument* instrument) {
      const Glib::ustring name(gig_to_utf8(instrument->pInfo->Name));
-Line 2762 
 void MainWindow::add_instrument(gig::Ins
+Line 3779 
 void MainWindow::add_instrument(gig::Ins
      instrument_name_connection.block();
      Gtk::TreeModel::iterator iterInstr = m_refTreeModel->append();
      Gtk::TreeModel::Row rowInstr = *iterInstr;
-     rowInstr[m_Columns.m_col_nr] = m_refTreeModel->children().size() - 1;
+     const int index = m_refTreeModel->children().size() - 1;
+     rowInstr[m_Columns.m_col_nr] = index;
      rowInstr[m_Columns.m_col_name] = name;
      rowInstr[m_Columns.m_col_instr] = instrument;
      rowInstr[m_Columns.m_col_scripts] = "";
+     rowInstr[m_Columns.m_col_tooltip] = scriptTooltipFor(instrument, index);
      instrument_name_connection.unblock();
+ #if !USE_GTKMM_BUILDER
      add_instrument_to_menu(name);
+ #endif
      select_instrument(instrument);
      file_changed();
  }
-Line 2837 
 void MainWindow::on_action_remove_instru
+Line 3858 
 void MainWindow::on_action_remove_instru
              if (instr) file->DeleteInstrument(instr);
              file_changed();
+ #if !USE_GTKMM_BUILDER
              remove_instrument_from_menu(index);
+ #endif
              // remove row from instruments tree view
              m_refTreeModel->erase(it);
-Line 2848 
 void MainWindow::on_action_remove_instru
+Line 3871 
 void MainWindow::on_action_remove_instru
                       it != m_refTreeModel->children().end(); ++it, ++index)
                  {
                      Gtk::TreeModel::Row row = *it;
+                     gig::Instrument* instrument = row[m_Columns.m_col_instr];
                      row[m_Columns.m_col_nr] = index;
+                     row[m_Columns.m_col_tooltip] = scriptTooltipFor(instrument, index);
                  }
              }
-Line 3052 
 void MainWindow::add_or_replace_sample(b
+Line 4077 
 void MainWindow::add_or_replace_sample(b
      // show 'browse for file' dialog
      Gtk::FileChooserDialog dialog(*this, replace ? _("Replace Sample with") : _("Add Sample(s)"));
+ #if HAS_GTKMM_STOCK
      dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
      dialog.add_button(Gtk::Stock::OPEN, Gtk::RESPONSE_OK);
+ #else
+     dialog.add_button(_("_Cancel"), Gtk::RESPONSE_CANCEL);
+     dialog.add_button(_("_Open"), Gtk::RESPONSE_OK);
+ #endif
      dialog.set_select_multiple(!replace); // allow multi audio file selection only when adding new samples, does not make sense when replacing a specific sample
      // matches all file types supported by libsndfile
-Line 3102 
 void MainWindow::add_or_replace_sample(b
+Line 4132 
 void MainWindow::add_or_replace_sample(b
          for (std::vector<std::string>::iterator iter = filenames.begin();
               iter != filenames.end(); ++iter) {
              printf("Adding sample %s\n",(*iter).c_str());
-             // use libsndfile to retrieve file informations
+             // use libsndfile to retrieve file information
              SF_INFO info;
              info.format = 0;
              SNDFILE* hFile = sf_open((*iter).c_str(), SFM_READ, &info);
-Line 3243 
 void MainWindow::on_action_replace_all_s
+Line 4273 
 void MainWindow::on_action_replace_all_s
      Gtk::Label description(str);
      description.set_line_wrap();
  #endif
-     Gtk::HBox entryArea;
+     HBox entryArea;
      Gtk::Label entryLabel( _("Add filename extension: "), Gtk::ALIGN_START);
      Gtk::Entry postfixEntryBox;
      postfixEntryBox.set_text(".wav");
      entryArea.pack_start(entryLabel);
      entryArea.pack_start(postfixEntryBox);
+ #if USE_GTKMM_BOX
+     dialog.get_content_area()->pack_start(description, Gtk::PACK_SHRINK);
+     dialog.get_content_area()->pack_start(entryArea, Gtk::PACK_SHRINK);
+ #else
      dialog.get_vbox()->pack_start(description, Gtk::PACK_SHRINK);
      dialog.get_vbox()->pack_start(entryArea, Gtk::PACK_SHRINK);
+ #endif
      description.show();
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      entryArea.show_all();
+ #else
+     entryArea.show();
+ #endif
+ #if HAS_GTKMM_STOCK
      dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
+ #else
+     dialog.add_button(_("_Cancel"), Gtk::RESPONSE_CANCEL);
+ #endif
      dialog.add_button(_("Select"), Gtk::RESPONSE_OK);
      dialog.set_select_multiple(false);
      if (current_sample_dir != "") {
-Line 3711 
 void MainWindow::instrument_name_changed
+Line 4756 
 void MainWindow::instrument_name_changed
      Gtk::TreeModel::Row row = *iter;
      Glib::ustring name = row[m_Columns.m_col_name];
+ #if !USE_GTKMM_BUILDER
      // change name in instrument menu
      int index = path[0];
      const std::vector<Gtk::Widget*> children = instrument_menu->get_children();
-Line 3723 
 void MainWindow::instrument_name_changed
+Line 4769 
 void MainWindow::instrument_name_changed
          item->set_active();
  #endif
      }
+ #endif
      // change name in gig
      gig::Instrument* instrument = row[m_Columns.m_col_instr];
-Line 3747 
 bool MainWindow::instrument_row_visible(
+Line 4794 
 bool MainWindow::instrument_row_visible(
      trim(pattern);
      if (pattern.empty()) return true;
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && GTKMM_MINOR_VERSION > 24)
+     //HACK: on GTKMM4 development branch const_iterator cannot be easily converted to iterator, probably going to be fixed before final GTKMM4 release though.
+     Gtk::TreeModel::Row row = **(Gtk::TreeModel::iterator*)(&iter);
+ #else
      Gtk::TreeModel::Row row = *iter;
+ #endif
      Glib::ustring name = row[m_Columns.m_col_name];
      name = name.lowercase();
-Line 3779 
 void MainWindow::on_action_combine_instr
+Line 4831 
 void MainWindow::on_action_combine_instr
      }
      d->setSelectedInstruments(indeces);
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      d->show_all();
+ #else
+     d->show();
+ #endif
      d->run();
      if (d->fileWasChanged()) {
          // update GUI with new instrument just created
-Line 3803 
 void MainWindow::on_action_view_referenc
+Line 4859 
 void MainWindow::on_action_view_referenc
      d->dimension_region_selected.connect(
          sigc::mem_fun(*this, &MainWindow::select_dimension_region)
      );
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      d->show_all();
+ #else
+     d->show();
+ #endif
      d->resize(500, 400);
      d->run();
      delete d;
-Line 3887 
 void MainWindow::mergeFiles(const std::v
+Line 4947 
 void MainWindow::mergeFiles(const std::v
              Glib::filename_display_basename(this->filename) + "' ...",
              *this
          );
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
          progress_dialog->show_all();
+ #else
+         progress_dialog->show();
+ #endif
          saver = new Saver(this->file); //FIXME: memory leak!
          saver->signal_progress().connect(
              sigc::mem_fun(*this, &MainWindow::on_saver_progress));
-Line 3914 
 void MainWindow::on_action_merge_files()
+Line 4978 
 void MainWindow::on_action_merge_files()
      }
      Gtk::FileChooserDialog dialog(*this, _("Merge .gig files"));
+ #if HAS_GTKMM_STOCK
      dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
+ #else
+     dialog.add_button(_("_Cancel"), Gtk::RESPONSE_CANCEL);
+ #endif
      dialog.add_button(_("Merge"), Gtk::RESPONSE_OK);
      dialog.set_default_response(Gtk::RESPONSE_CANCEL);
  #if (GTKMM_MAJOR_VERSION == 2 && GTKMM_MINOR_VERSION < 90) || GTKMM_MAJOR_VERSION < 2
-Line 3931 
 void MainWindow::on_action_merge_files()
+Line 4999 
 void MainWindow::on_action_merge_files()
      dialog.set_select_multiple(true);
      // show warning in the file picker dialog
-     Gtk::HBox descriptionArea;
+     HBox descriptionArea;
      descriptionArea.set_spacing(15);
      Gtk::Image warningIcon;
      warningIcon.set_from_icon_name("dialog-warning",
-Line 3954 
 void MainWindow::on_action_merge_files()
+Line 5022 
 void MainWindow::on_action_merge_files()
          "will accordingly be stored separately in the target .gig file!"
      ));
      descriptionArea.pack_start(description);
+ #if USE_GTKMM_BOX
+ # warning No description area implemented for dialog on GTKMM 3
+ #else
      dialog.get_vbox()->pack_start(descriptionArea, Gtk::PACK_SHRINK);
+ #endif
+ #if HAS_GTKMM_SHOW_ALL_CHILDREN
      descriptionArea.show_all();
+ #else
+     descriptionArea.show();
+ #endif
      if (dialog.run() == Gtk::RESPONSE_OK) {
          printf("on_action_merge_files self=%p\n",
-Line 3991 
 void MainWindow::set_file_is_shared(bool
+Line 5067 
 void MainWindow::set_file_is_shared(bool
      }
      {
+ #if USE_GTKMM_BUILDER
+         m_actionToggleSyncSamplerSelection->property_enabled() = b;
+ #else
          Gtk::MenuItem* item = dynamic_cast<Gtk::MenuItem*>(
              uiManager->get_widget("/MenuBar/MenuSettings/SyncSamplerInstrumentSelection"));
          if (item) item->set_sensitive(b);
+ #endif
      }
  }
-Line 4150 
 void MainWindow::updateClipboardPasteAva
+Line 5230 
 void MainWindow::updateClipboardPasteAva
  void MainWindow::updateClipboardCopyAvailable() {
      bool bDimensionRegionCopyIsPossible = m_DimRegionChooser.get_main_dimregion();
+ #if USE_GTKMM_BUILDER
+     m_actionCopyDimRgn->property_enabled() = bDimensionRegionCopyIsPossible;
+ #else
      static_cast<Gtk::MenuItem*>(
          uiManager->get_widget("/MenuBar/MenuEdit/CopyDimRgn")
      )->set_sensitive(bDimensionRegionCopyIsPossible);
+ #endif
  }
+ #if GTKMM_MAJOR_VERSION > 3 || (GTKMM_MAJOR_VERSION == 3 && (GTKMM_MINOR_VERSION > 91 || (GTKMM_MINOR_VERSION == 91 && GTKMM_MICRO_VERSION >= 2))) // GTKMM >= 3.91.2
+ void MainWindow::on_clipboard_owner_change(Gdk::EventOwnerChange& event) {
+ #else
  void MainWindow::on_clipboard_owner_change(GdkEventOwnerChange* event) {
+ #endif
      updateClipboardPasteAvailable();
  }
-Line 4222 
 void MainWindow::on_clipboard_received_t
+Line 5310 
 void MainWindow::on_clipboard_received_t
          std::find(targets.begin(), targets.end(),
                    CLIPBOARD_DIMENSIONREGION_TARGET) != targets.end();
+ #if USE_GTKMM_BUILDER
+     m_actionPasteDimRgn->property_enabled() = bDimensionRegionPasteIsPossible;
+     m_actionAdjustClipboard->property_enabled() = bDimensionRegionPasteIsPossible;
+ #else
      static_cast<Gtk::MenuItem*>(
          uiManager->get_widget("/MenuBar/MenuEdit/PasteDimRgn")
      )->set_sensitive(bDimensionRegionPasteIsPossible);
-Line 4229 
 void MainWindow::on_clipboard_received_t
+Line 5321 
 void MainWindow::on_clipboard_received_t
      static_cast<Gtk::MenuItem*>(
          uiManager->get_widget("/MenuBar/MenuEdit/AdjustClipboard")
      )->set_sensitive(bDimensionRegionPasteIsPossible);
+ #endif
  }
  sigc::signal<void, gig::File*>& MainWindow::signal_file_structure_to_be_changed() {

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-Removed from v.3344
+Added in v.3456

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