[tali] Add Keyboard Shortcuts overlay

[Jeremy Bicha <jbicha src gnome org>]

commit d80c1b62c2efc56726ae4712e50825ce657eacb9
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Mon Dec 10 12:57:38 2018 -0500

    Add Keyboard Shortcuts overlay

 data/help-overlay.ui   | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++
 data/tali-menus.ui     |  4 +++
 po/POTFILES.in         |  1 +
 src/tali.gresource.xml |  3 ++
 4 files changed, 102 insertions(+)
---
diff --git a/data/help-overlay.ui b/data/help-overlay.ui
new file mode 100644
index 0000000..ff903f1
--- /dev/null
+++ b/data/help-overlay.ui
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.17 -->
+  <object class="GtkShortcutsWindow" id="help_overlay">
+    <property name="modal">1</property>
+    <child>
+      <object class="GtkShortcutsSection">
+        <property name="visible">1</property>
+        <child>
+          <object class="GtkShortcutsGroup">
+            <property name="visible">1</property>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;Ctrl&gt;N</property>
+                <property name="title" translatable="yes" context="shortcut window">Start a new 
game</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;Ctrl&gt;R</property>
+                <property name="title" translatable="yes" context="shortcut window">Roll the dice</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">1</property>
+                <property name="title" translatable="yes" context="shortcut window">Toggle the first 
die</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">2</property>
+                <property name="title" translatable="yes" context="shortcut window">Toggle the second 
die</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">3</property>
+                <property name="title" translatable="yes" context="shortcut window">Toggle the third 
die</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">4</property>
+                <property name="title" translatable="yes" context="shortcut window">Toggle the fourth 
die</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">5</property>
+                <property name="title" translatable="yes" context="shortcut window">Toggle the fifth 
die</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;Ctrl&gt;Z</property>
+                <property name="title" translatable="yes" context="shortcut window">Undo move</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">F1</property>
+                <property name="title" translatable="yes" context="shortcut window">Show Help</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;Primary&gt;question &lt;Primary&gt;F1</property>
+                <property name="title" translatable="yes" context="shortcut window">Show Keyboard 
Shortcuts</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkShortcutsShortcut">
+                <property name="visible">1</property>
+                <property name="accelerator">&lt;Ctrl&gt;Q</property>
+                <property name="title" translatable="yes" context="shortcut window">Quit</property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>
diff --git a/data/tali-menus.ui b/data/tali-menus.ui
index 20f4149..bf02785 100644
--- a/data/tali-menus.ui
+++ b/data/tali-menus.ui
@@ -17,6 +17,10 @@
         <attribute name="label" translatable="yes">_Preferences</attribute>
         <attribute name="action">app.preferences</attribute>
       </item>
+      <item>
+        <attribute name="label" translatable="yes">_Keyboard Shortcuts</attribute>
+        <attribute name="action">win.show-help-overlay</attribute>
+      </item>
       <item>
         <attribute name="label" translatable="yes">_Help</attribute>
         <attribute name="action">app.help</attribute>
diff --git a/po/POTFILES.in b/po/POTFILES.in
index edd1d5b..1f00ad8 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,5 +1,6 @@
 # List of source files containing translatable strings.
 # Please keep this file in alphabetical order.
+data/help-overlay.ui
 data/tali.appdata.xml.in
 data/tali.desktop.in
 data/tali-menus.ui
diff --git a/src/tali.gresource.xml b/src/tali.gresource.xml
index a88deba..6fc7b92 100644
--- a/src/tali.gresource.xml
+++ b/src/tali.gresource.xml
@@ -7,4 +7,7 @@
   <gresource prefix="/org/gnome/tali/ui">
     <file preprocess="xml-stripblanks" alias="menus.ui">../data/tali-menus.ui</file>
   </gresource>
+  <gresource prefix="/org/gnome/tali/gtk">
+    <file preprocess="xml-stripblanks" alias="help-overlay.ui">../data/help-overlay.ui</file>
+  </gresource>
 </gresources>