[gtkmm-documentation] Main menu example: Make the keyboard shortcuts work

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 6888538cd6428a4db5c90efc2d70cf551e6e34e7
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Thu May 27 15:18:22 2021 +0200

    Main menu example: Make the keyboard shortcuts work

 examples/book/builder/basic/basic.glade             |  2 +-
 examples/book/builder/derived/derived.glade         |  2 +-
 examples/book/menus/main_menu/exampleapplication.cc |  5 +++++
 examples/book/menus_and_toolbars/examplewindow.cc   | 11 +----------
 4 files changed, 8 insertions(+), 12 deletions(-)
---
diff --git a/examples/book/builder/basic/basic.glade b/examples/book/builder/basic/basic.glade
index 6b0e17b..f97c225 100644
--- a/examples/book/builder/basic/basic.glade
+++ b/examples/book/builder/basic/basic.glade
@@ -5,7 +5,7 @@
     <property name="can_focus">False</property>
     <property name="title" translatable="yes">Basic Builder example</property>
     <property name="default_width">250</property>
-    <property name="default_height">100</property>
+    <property name="default_height">120</property>
     <property name="hide_on_close">True</property>
     <child internal-child="content_area">
       <object class="GtkBox" id="dialog-vbox2">
diff --git a/examples/book/builder/derived/derived.glade b/examples/book/builder/derived/derived.glade
index 29457fc..be276cd 100644
--- a/examples/book/builder/derived/derived.glade
+++ b/examples/book/builder/derived/derived.glade
@@ -5,7 +5,7 @@
     <property name="can_focus">False</property>
     <property name="title" translatable="yes">Derived Builder example</property>
     <property name="default_width">250</property>
-    <property name="default_height">100</property>
+    <property name="default_height">120</property>
     <property name="hide_on_close">True</property>
     <child internal-child="content_area">
       <object class="GtkBox" id="dialog-vbox2">
diff --git a/examples/book/menus/main_menu/exampleapplication.cc 
b/examples/book/menus/main_menu/exampleapplication.cc
index 1569aca..47d1cbf 100644
--- a/examples/book/menus/main_menu/exampleapplication.cc
+++ b/examples/book/menus/main_menu/exampleapplication.cc
@@ -52,6 +52,11 @@ void ExampleApplication::on_startup()
   //Help menu:
   add_action("about", sigc::mem_fun(*this, &ExampleApplication::on_menu_help_about));
 
+  // Set accelerator keys:
+  set_accel_for_action("app.newstandard", "<Primary>n");
+  set_accel_for_action("app.quit", "<Primary>q");
+  set_accel_for_action("win.copy", "<Primary>c");
+  set_accel_for_action("win.paste", "<Primary>v");
   m_refBuilder = Gtk::Builder::create();
 
   //Layout the actions in a menubar and a menu:
diff --git a/examples/book/menus_and_toolbars/examplewindow.cc 
b/examples/book/menus_and_toolbars/examplewindow.cc
index 6803848..da0cc21 100644
--- a/examples/book/menus_and_toolbars/examplewindow.cc
+++ b/examples/book/menus_and_toolbars/examplewindow.cc
@@ -62,12 +62,10 @@ ExampleWindow::ExampleWindow(const Glib::RefPtr<Gtk::Application>& app)
     "        <item>"
     "          <attribute name='label' translatable='yes'>_New</attribute>"
     "          <attribute name='action'>example.new</attribute>"
-    "          <attribute name='accel'>&lt;Primary&gt;n</attribute>"
     "        </item>"
     "        <item>"
     "          <attribute name='label' translatable='yes'>_Open</attribute>"
     "          <attribute name='action'>example.open</attribute>"
-    "          <attribute name='accel'>&lt;Primary&gt;o</attribute>"
     "        </item>"
     "      </section>"
     "      <section>"
@@ -80,7 +78,6 @@ ExampleWindow::ExampleWindow(const Glib::RefPtr<Gtk::Application>& app)
     "        <item>"
     "          <attribute name='label' translatable='yes'>_Quit</attribute>"
     "          <attribute name='action'>example.quit</attribute>"
-    "          <attribute name='accel'>&lt;Primary&gt;q</attribute>"
     "        </item>"
     "      </section>"
     "    </submenu>"
@@ -89,26 +86,20 @@ ExampleWindow::ExampleWindow(const Glib::RefPtr<Gtk::Application>& app)
     "      <item>"
     "        <attribute name='label' translatable='yes'>_Cut</attribute>"
     "        <attribute name='action'>example.cut</attribute>"
-    "        <attribute name='accel'>&lt;Primary&gt;x</attribute>"
     "      </item>"
     "      <item>"
     "        <attribute name='label' translatable='yes'>_Copy</attribute>"
     "        <attribute name='action'>example.copy</attribute>"
-    "        <attribute name='accel'>&lt;Primary&gt;c</attribute>"
     "      </item>"
     "      <item>"
     "        <attribute name='label' translatable='yes'>_Paste</attribute>"
     "        <attribute name='action'>example.paste</attribute>"
-    "        <attribute name='accel'>&lt;Primary&gt;v</attribute>"
     "      </item>"
     "    </submenu>"
     "  </menu>"
     "</interface>";
 
-  // When the menubar is a child of a Gtk::Window, keyboard accelerators are not
-  // automatically fetched from the Gio::Menu.
-  // See the examples/book/menus/main_menu example for an alternative way of
-  // adding the menubar when using Gtk::ApplicationWindow.
+  // Set accelerator keys:
   app->set_accel_for_action("example.new", "<Primary>n");
   app->set_accel_for_action("example.open", "<Primary>o");
   app->set_accel_for_action("example.quit", "<Primary>q");