[gnome-sudoku/arnaudb/improve-code: 1/5] Clean UI files.



commit 7a76284c2e15b2ccafb51874cd0c67ad38f860c4
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Apr 12 17:16:33 2020 +0200

    Clean UI files.

 data/gnome-sudoku.ui | 696 +++++++++++++++++++++++++--------------------------
 data/print-dialog.ui | 100 ++++----
 2 files changed, 398 insertions(+), 398 deletions(-)
---
diff --git a/data/gnome-sudoku.ui b/data/gnome-sudoku.ui
index 8da91bd..3dcfce6 100644
--- a/data/gnome-sudoku.ui
+++ b/data/gnome-sudoku.ui
@@ -1,377 +1,377 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-    <!-- interface-requires gtk+ 3.10 -->
-    <object class="GtkHeaderBar" id="headerbar">
+  <!-- interface-requires gtk+ 3.10 -->
+  <object class="GtkHeaderBar" id="headerbar">
+    <property name="visible">True</property>
+    <property name="can-focus">False</property>
+    <property name="title" translatable="yes">Sudoku</property>
+    <child>
+      <object class="GtkBox" id="undo_redo_box">
         <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="title" translatable="yes">Sudoku</property>
+        <property name="can-focus">False</property>
+        <property name="homogeneous">True</property>
+        <style>
+          <class name="raised"/>
+          <class name="linked"/>
+        </style>
         <child>
-            <object class="GtkBox" id="undo_redo_box">
+          <object class="GtkButton">
+            <property name="visible">True</property>
+            <property name="sensitive">False</property>
+            <property name="valign">center</property>
+            <property name="tooltip-text" translatable="yes">Undo your last action</property>
+            <property name="can-focus">True</property>
+            <property name="focus-on-click">False</property>
+            <property name="action-name">app.undo</property>
+            <style>
+              <class name="image-button"/>
+            </style>
+            <child>
+              <object class="GtkImage">
+                <property name="icon-name">edit-undo-symbolic</property>
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="homogeneous">True</property>
-                <style>
-                  <class name="raised"/>
-                  <class name="linked"/>
-                </style>
-                <child>
-                    <object class="GtkButton" id="undo_button">
-                        <property name="visible">True</property>
-                        <property name="sensitive">False</property>
-                        <property name="valign">center</property>
-                        <property name="tooltip-text" translatable="yes">Undo your last action</property>
-                        <property name="can_focus">True</property>
-                        <property name="focus_on_click">False</property>
-                        <property name="action-name">app.undo</property>
-                        <style>
-                            <class name="image-button"/>
-                        </style>
-                        <child>
-                            <object class="GtkImage" id="undo_image">
-                                <property name="icon_name">edit-undo-symbolic</property>
-                                <property name="visible">True</property>
-                                <property name="icon_size">1</property>
-                            </object>
-                        </child>
-                    </object>
-                </child>
-                <child>
-                    <object class="GtkButton" id="redo_button">
-                        <property name="visible">True</property>
-                        <property name="sensitive">False</property>
-                        <property name="valign">center</property>
-                        <property name="tooltip-text" translatable="yes">Redo your last action</property>
-                        <property name="can_focus">True</property>
-                        <property name="focus_on_click">False</property>
-                        <property name="action-name">app.redo</property>
-                        <style>
-                            <class name="image-button"/>
-                        </style>
-                        <child>
-                            <object class="GtkImage" id="redo_image">
-                                <property name="icon_name">edit-redo-symbolic</property>
-                                <property name="visible">True</property>
-                                <property name="icon_size">1</property>
-                            </object>
-                        </child>
-                    </object>
-                </child>
-            </object>
+                <property name="icon-size">1</property>
+              </object>
+            </child>
+          </object>
         </child>
         <child>
-            <object class="GtkMenuButton">
+          <object class="GtkButton">
+            <property name="visible">True</property>
+            <property name="sensitive">False</property>
+            <property name="valign">center</property>
+            <property name="tooltip-text" translatable="yes">Redo your last action</property>
+            <property name="can-focus">True</property>
+            <property name="focus-on-click">False</property>
+            <property name="action-name">app.redo</property>
+            <style>
+              <class name="image-button"/>
+            </style>
+            <child>
+              <object class="GtkImage">
+                <property name="icon-name">edit-redo-symbolic</property>
                 <property name="visible">True</property>
-                <property name="menu_model">primary_menu</property>
-                <child>
-                    <object class="GtkImage">
-                        <property name="visible">True</property>
-                        <property name="halign">center</property>
-                        <property name="icon_name">open-menu-symbolic</property>
-                    </object>
-                </child>
-            </object>
-            <packing>
-                <property name="pack-type">end</property>
-            </packing>
+                <property name="icon-size">1</property>
+              </object>
+            </child>
+          </object>
         </child>
+      </object>
+    </child>
+    <child>
+      <object class="GtkMenuButton">
+        <property name="visible">True</property>
+        <property name="menu-model">primary-menu</property>
         <child>
-            <object class="GtkBox" id="timer_box">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="spacing">6</property>
-                <child>
-                    <object class="GtkImage" id="clock_image">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="icon_name">preferences-system-time-symbolic</property>
-                        <property name="icon_size">1</property>
-                    </object>
-                </child>
-                <child>
-                    <object class="GtkLabel" id="clock_label">
-                        <property name="visible">True</property>
-                        <property name="can_focus">False</property>
-                        <property name="halign">center</property>
-                    </object>
-                </child>
-            </object>
-            <packing>
-                <property name="pack-type">end</property>
-            </packing>
+          <object class="GtkImage">
+            <property name="visible">True</property>
+            <property name="halign">center</property>
+            <property name="icon-name">open-menu-symbolic</property>
+          </object>
         </child>
+      </object>
+      <packing>
+        <property name="pack-type">end</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="can-focus">False</property>
+        <property name="spacing">6</property>
         <child>
-            <object class="GtkButton" id="back_button">
-                <property name="visible">False</property>
-                <property name="halign">center</property>
-                <property name="valign">center</property>
-                <property name="tooltip-text" translatable="yes">Go back to the current game</property>
-                <property name="use_underline">True</property>
-                <property name="action-name">app.back</property>
-                <style>
-                    <class name="image-button"/>
-                </style>
-                <child>
-                    <object class="GtkImage" id="back_image">
-                        <property name="icon_name">go-previous-symbolic</property>
-                        <property name="visible">True</property>
-                        <property name="icon_size">1</property>
-                    </object>
-                </child>
-            </object>
+          <object class="GtkImage" id="clock_image">
+            <property name="visible">True</property>
+            <property name="can-focus">False</property>
+            <property name="icon-name">preferences-system-time-symbolic</property>
+            <property name="icon-size">1</property>
+          </object>
         </child>
-    </object>
-    <menu id="primary_menu">
-        <section>
-            <submenu>
-                <attribute name="label" translatable="yes">_Print</attribute>
-                <section>
-                    <item>
-                        <attribute name="label" translatable="yes">Print _Current Puzzle…</attribute>
-                        <attribute name="action">app.print</attribute>
-                    </item>
-                    <item>
-                        <attribute name="label" translatable="yes">Print _Multiple Puzzles…</attribute>
-                        <attribute name="action">app.print-multiple</attribute>
-                    </item>
-                </section>
-            </submenu>
-        </section>
-        <section>
-            <item>
-                <attribute name="label" translatable="yes">High_lighter</attribute>
-                <attribute name="action">app.highlighter</attribute>
-            </item>
-            <item>
-                <attribute name="label" translatable="yes">_Warnings</attribute>
-                <attribute name="action">app.show-warnings</attribute>
-            </item>
-        </section>
+        <child>
+          <object class="GtkLabel" id="clock_label">
+            <property name="visible">True</property>
+            <property name="can-focus">False</property>
+            <property name="halign">center</property>
+          </object>
+        </child>
+      </object>
+      <packing>
+        <property name="pack-type">end</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkButton" id="back_button">
+        <property name="visible">False</property>
+        <property name="halign">center</property>
+        <property name="valign">center</property>
+        <property name="tooltip-text" translatable="yes">Go back to the current game</property>
+        <property name="use-underline">True</property>
+        <property name="action-name">app.back</property>
+        <style>
+          <class name="image-button"/>
+        </style>
+        <child>
+          <object class="GtkImage">
+            <property name="icon-name">go-previous-symbolic</property>
+            <property name="visible">True</property>
+            <property name="icon-size">1</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+  <menu id="primary-menu">
+    <section>
+      <submenu>
+        <attribute name="label" translatable="yes">_Print</attribute>
         <section>
-            <item>
-                <attribute name="label" translatable="yes">_Help</attribute>
-                <attribute name="action">app.help</attribute>
-            </item>
-            <item>
-                <attribute name="label" translatable="yes">_About Sudoku</attribute>
-                <attribute name="action">app.about</attribute>
-            </item>
+          <item>
+            <attribute name="label" translatable="yes">Print _Current Puzzle…</attribute>
+            <attribute name="action">app.print</attribute>
+          </item>
+          <item>
+            <attribute name="label" translatable="yes">Print _Multiple Puzzles…</attribute>
+            <attribute name="action">app.print-multiple</attribute>
+          </item>
         </section>
-    </menu>
-    <object class="GtkApplicationWindow" id="sudoku_app">
-        <property name="title" translatable="yes">Sudoku</property>
+      </submenu>
+    </section>
+    <section>
+      <item>
+        <attribute name="label" translatable="yes">High_lighter</attribute>
+        <attribute name="action">app.highlighter</attribute>
+      </item>
+      <item>
+        <attribute name="label" translatable="yes">_Warnings</attribute>
+        <attribute name="action">app.show-warnings</attribute>
+      </item>
+    </section>
+    <section>
+      <item>
+        <attribute name="label" translatable="yes">_Help</attribute>
+        <attribute name="action">app.help</attribute>
+      </item>
+      <item>
+        <attribute name="label" translatable="yes">_About Sudoku</attribute>
+        <attribute name="action">app.about</attribute>
+      </item>
+    </section>
+  </menu>
+  <object class="GtkApplicationWindow" id="sudoku_app">
+    <property name="title" translatable="yes">Sudoku</property>
+    <child>
+      <object class="GtkBox"> <!-- vbox -->
+        <property name="orientation">vertical</property>
+        <property name="visible">True</property>
         <child>
-            <object class="GtkBox" id="vbox">
+          <object class="GtkStack" id="main_stack">
+            <property name="visible">True</property>
+            <property name="homogeneous">True</property>
+            <property name="margin">25</property>
+            <property name="expand">True</property>
+            <child>
+              <object class="GtkBox"> <!-- start_box -->
                 <property name="orientation">vertical</property>
                 <property name="visible">True</property>
+                <property name="halign">center</property>
+                <property name="valign">center</property>
+                <property name="margin">0</property>
+                <property name="width-request">350</property>
+                <property name="height-request">350</property>
+                <child>
+                  <object class="GtkButton">
+                    <property name="visible">True</property>
+                    <property name="use-underline">True</property>
+                    <property name="label" translatable="yes">_Easy</property>
+                    <property name="action-name">app.start-game</property>
+                    <property name="action-target">1</property>  <!-- 1 corresponds to enum 
DifficultyCategory.EASY -->
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton">
+                    <property name="visible">True</property>
+                    <property name="use-underline">True</property>
+                    <property name="label" translatable="yes">_Medium</property>
+                    <property name="action-name">app.start-game</property>
+                    <property name="action-target">2</property>  <!-- 2 corresponds to enum 
DifficultyCategory.MEDIUM -->
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton">
+                    <property name="visible">True</property>
+                    <property name="use-underline">True</property>
+                    <property name="label" translatable="yes">_Hard</property>
+                    <property name="action-name">app.start-game</property>
+                    <property name="action-target">3</property>  <!-- 3 corresponds to enum 
DifficultyCategory.HARD -->
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">2</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton">
+                    <property name="visible">True</property>
+                    <property name="use-underline">True</property>
+                    <property name="label" translatable="yes">_Very Hard</property>
+                    <property name="action-name">app.start-game</property>
+                    <property name="action-target">4</property>  <!-- 4 corresponds to enum 
DifficultyCategory.VERY_HARD -->
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">3</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton">
+                    <property name="visible">True</property>
+                    <property name="use-underline">True</property>
+                    <property name="margin-top">30</property>
+                    <property name="label" translatable="yes">_Create your own puzzle</property>
+                    <property name="action-name">app.create-game</property>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">5</property>
+                  </packing>
+                </child>
+              </object> <!-- End of start_box -->
+              <packing>
+                <property name="name">start_box</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkAspectFrame"> <!-- frame -->
+                <property name="visible">True</property>
+                <property name="shadow-type">GTK_SHADOW_NONE</property>
+                <property name="obey-child">False</property>
+                <property name="ratio">1.4</property>
                 <child>
-                    <object class="GtkStack" id="main_stack">
+                  <object class="GtkBox" id="game_box">
+                    <property name="visible">True</property>
+                    <property name="spacing">25</property>
+                    <child>
+                      <object class="GtkButtonBox"> <!-- controls_box -->
                         <property name="visible">True</property>
-                        <property name="homogeneous">True</property>
-                        <property name="margin">25</property>
-                        <property name="expand">True</property>
+                        <property name="halign">end</property>
+                        <property name="valign">end</property>
+                        <property name="can-focus">False</property>
+                        <property name="orientation">vertical</property>
+                        <property name="spacing">6</property>
                         <child>
-                            <object class="GtkBox" id="start_box">
-                                <property name="orientation">vertical</property>
+                          <object class="GtkButton" id="play_pause_button">
+                            <property name="visible">True</property>
+                            <property name="can-focus">True</property>
+                            <property name="receives-default">True</property>
+                            <property name="action-name">app.pause</property>
+                            <property name="use-underline">True</property>
+                            <property name="width-request">120</property>
+                            <property name="height-request">60</property>
+                            <child>
+                              <object class="GtkLabel" id="play_pause_label">
                                 <property name="visible">True</property>
-                                <property name="halign">center</property>
-                                <property name="valign">center</property>
-                                <property name="margin">0</property>
-                                <property name="width-request">350</property>
-                                <property name="height-request">350</property>
-                                <child>
-                                    <object class="GtkButton" id="easy_button">
-                                        <property name="visible">True</property>
-                                        <property name="use_underline">True</property>
-                                        <property name="label" translatable="yes">_Easy</property>
-                                        <property name="action-name">app.start-game</property>
-                                        <property name="action-target">1</property>  <!-- 1 corresponds to 
enum DifficultyCategory.EASY -->
-                                    </object>
-                                    <packing>
-                                        <property name="expand">True</property>
-                                        <property name="fill">True</property>
-                                        <property name="position">0</property>
-                                    </packing>
-                                </child>
-                                <child>
-                                    <object class="GtkButton" id="medium_button">
-                                        <property name="visible">True</property>
-                                        <property name="use_underline">True</property>
-                                        <property name="label" translatable="yes">_Medium</property>
-                                        <property name="action-name">app.start-game</property>
-                                        <property name="action-target">2</property>  <!-- 2 corresponds to 
enum DifficultyCategory.MEDIUM -->
-                                    </object>
-                                    <packing>
-                                        <property name="expand">True</property>
-                                        <property name="fill">True</property>
-                                        <property name="position">1</property>
-                                    </packing>
-                                </child>
-                                <child>
-                                    <object class="GtkButton" id="hard_button">
-                                        <property name="visible">True</property>
-                                        <property name="use_underline">True</property>
-                                        <property name="label" translatable="yes">_Hard</property>
-                                        <property name="action-name">app.start-game</property>
-                                        <property name="action-target">3</property>  <!-- 3 corresponds to 
enum DifficultyCategory.HARD -->
-                                    </object>
-                                    <packing>
-                                        <property name="expand">True</property>
-                                        <property name="fill">True</property>
-                                        <property name="position">2</property>
-                                    </packing>
-                                </child>
-                                <child>
-                                    <object class="GtkButton" id="very_hard_button">
-                                        <property name="visible">True</property>
-                                        <property name="use_underline">True</property>
-                                        <property name="label" translatable="yes">_Very Hard</property>
-                                        <property name="action-name">app.start-game</property>
-                                        <property name="action-target">4</property>  <!-- 4 corresponds to 
enum DifficultyCategory.VERY_HARD -->
-                                    </object>
-                                    <packing>
-                                        <property name="expand">True</property>
-                                        <property name="fill">True</property>
-                                        <property name="position">3</property>
-                                    </packing>
-                                </child>
-                                <child>
-                                    <object class="GtkButton" id="create_game_button">
-                                        <property name="visible">True</property>
-                                        <property name="use_underline">True</property>
-                                        <property name="margin_top">30</property>
-                                        <property name="label" translatable="yes">_Create your own 
puzzle</property>
-                                        <property name="action-name">app.create-game</property>
-                                    </object>
-                                    <packing>
-                                        <property name="expand">True</property>
-                                        <property name="fill">True</property>
-                                        <property name="position">5</property>
-                                    </packing>
-                                </child>
-                            </object> <!-- End of start_box -->
-                            <packing>
-                                <property name="name">start_box</property>
-                            </packing>
+                                <property name="can-focus">False</property>
+                                <property name="margin">12</property>
+                                <property name="label" translatable="yes">_Pause</property>
+                                <property name="use-underline">True</property>
+                              </object>
+                            </child>
+                          </object>
+                          <packing>
+                            <property name="expand">False</property>
+                            <property name="fill">True</property>
+                            <property name="pack-type">end</property>
+                            <property name="position">0</property>
+                          </packing>
                         </child>
                         <child>
-                            <object class="GtkAspectFrame" id="frame">
-                                <property name="visible">True</property>
-                                <property name="shadow-type">GTK_SHADOW_NONE</property>
-                                <property name="obey-child">false</property>
-                                <property name="ratio">1.4</property>
-                                <child>
-                                    <object class="GtkBox" id="game_box">
-                                        <property name="visible">True</property>
-                                        <property name="spacing">25</property>
-                                        <child>
-                                            <object class="GtkButtonBox" id="controls_box">
-                                                <property name="visible">True</property>
-                                                <property name="halign">end</property>
-                                                <property name="valign">end</property>
-                                                <property name="can_focus">False</property>
-                                                <property name="orientation">vertical</property>
-                                                <property name="spacing">6</property>
-                                                <child>
-                                                    <object class="GtkButton" id="play_pause_button">
-                                                        <property name="visible">True</property>
-                                                        <property name="can_focus">True</property>
-                                                        <property name="receives_default">True</property>
-                                                        <property name="action_name">app.pause</property>
-                                                        <property name="use_underline">True</property>
-                                                        <property name="width-request">120</property>
-                                                        <property name="height-request">60</property>
-                                                        <child>
-                                                            <object class="GtkLabel" id="play_pause_label">
-                                                                <property name="visible">True</property>
-                                                                <property name="can_focus">False</property>
-                                                                <property name="margin">12</property>
-                                                                <property name="label" 
translatable="yes">_Pause</property>
-                                                                <property 
name="use_underline">True</property>
-                                                            </object>
-                                                        </child>
-                                                    </object>
-                                                        <packing>
-                                                        <property name="expand">False</property>
-                                                        <property name="fill">True</property>
-                                                        <property name="pack_type">end</property>
-                                                        <property name="position">0</property>
-                                                    </packing>
-                                                </child>
-                                                <child>
-                                                    <object class="GtkButton" id="clear_button">
-                                                        <property name="visible">True</property>
-                                                        <property name="use_underline">True</property>
-                                                        <property name="label" translatable="yes">_Clear 
Board</property>
-                                                        <property name="halign">fill</property>
-                                                        <property name="valign">center</property>
-                                                        <property name="action-name">app.reset</property>
-                                                        <property name="tooltip-text" 
translatable="yes">Reset the board to its original state</property>
-                                                        <property name="width-request">120</property>
-                                                        <property name="height-request">60</property>
-                                                    </object>
-                                                    <packing>
-                                                        <property name="expand">True</property>
-                                                        <property name="fill">True</property>
-                                                        <property name="position">1</property>
-                                                    </packing>
-                                                </child>
-                                                <child>
-                                                    <object class="GtkButton" id="new_button">
-                                                        <property name="visible">True</property>
-                                                        <property name="use_underline">True</property>
-                                                        <property name="label" translatable="yes">_New 
Puzzle</property>
-                                                        <property name="halign">fill</property>
-                                                        <property name="valign">center</property>
-                                                        <property name="action-name">app.new-game</property>
-                                                        <property name="tooltip-text" 
translatable="yes">Start a new puzzle</property>
-                                                        <property name="width-request">120</property>
-                                                        <property name="height-request">60</property>
-                                                    </object>
-                                                    <packing>
-                                                        <property name="expand">False</property>
-                                                        <property name="fill">False</property>
-                                                        <property name="position">2</property>
-                                                    </packing>
-                                                </child>
-                                                <child>
-                                                    <object class="GtkButton" id="play_custom_game_button">
-                                                        <property name="visible">False</property>
-                                                        <property name="use_underline">True</property>
-                                                        <property name="label" translatable="yes">_Start 
Playing</property>
-                                                        <property name="halign">fill</property>
-                                                        <property name="valign">center</property>
-                                                        <property 
name="action-name">app.play-custom-game</property>
-                                                        <property name="tooltip-text" 
translatable="yes">Start playing the custom puzzle you have created</property>
-                                                        <property name="width-request">120</property>
-                                                        <property name="height-request">60</property>
-                                                    </object>
-                                                    <packing>
-                                                        <property name="expand">True</property>
-                                                        <property name="fill">True</property>
-                                                        <property name="position">3</property>
-                                                    </packing>
-                                                </child>
-                                            </object>  <!-- End of controls_box -->
-                                            <packing>
-                                                <property name="expand">False</property>
-                                                <property name="fill">True</property>
-                                                <property name="pack-type">end</property>
-                                                <property name="padding">0</property>
-                                            </packing>
-                                        </child>
-                                    </object> <!-- End of game_box -->
-                                </child>
-                            </object> <!-- End of frame -->
-                            <packing>
-                                <property name="name">frame</property>
-                            </packing>
+                          <object class="GtkButton">
+                            <property name="visible">True</property>
+                            <property name="use-underline">True</property>
+                            <property name="label" translatable="yes">_Clear Board</property>
+                            <property name="halign">fill</property>
+                            <property name="valign">center</property>
+                            <property name="action-name">app.reset</property>
+                            <property name="tooltip-text" translatable="yes">Reset the board to its original 
state</property>
+                            <property name="width-request">120</property>
+                            <property name="height-request">60</property>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="fill">True</property>
+                            <property name="position">1</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkButton">
+                            <property name="visible">True</property>
+                            <property name="use-underline">True</property>
+                            <property name="label" translatable="yes">_New Puzzle</property>
+                            <property name="halign">fill</property>
+                            <property name="valign">center</property>
+                            <property name="action-name">app.new-game</property>
+                            <property name="tooltip-text" translatable="yes">Start a new puzzle</property>
+                            <property name="width-request">120</property>
+                            <property name="height-request">60</property>
+                          </object>
+                          <packing>
+                            <property name="expand">False</property>
+                            <property name="fill">False</property>
+                            <property name="position">2</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkButton" id="play_custom_game_button">
+                            <property name="visible">False</property>
+                            <property name="use-underline">True</property>
+                            <property name="label" translatable="yes">_Start Playing</property>
+                            <property name="halign">fill</property>
+                            <property name="valign">center</property>
+                            <property name="action-name">app.play-custom-game</property>
+                            <property name="tooltip-text" translatable="yes">Start playing the custom puzzle 
you have created</property>
+                            <property name="width-request">120</property>
+                            <property name="height-request">60</property>
+                          </object>
+                          <packing>
+                            <property name="expand">True</property>
+                            <property name="fill">True</property>
+                            <property name="position">3</property>
+                          </packing>
                         </child>
-                    </object> <!-- End of main_stack -->
-                    <packing>
+                      </object>  <!-- End of controls_box -->
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
                         <property name="pack-type">end</property>
-                    </packing>
+                        <property name="padding">0</property>
+                      </packing>
+                    </child>
+                  </object> <!-- End of game_box -->
                 </child>
-            </object> <!-- End of vbox -->
+              </object> <!-- End of frame -->
+              <packing>
+                <property name="name">frame</property>
+              </packing>
+            </child>
+          </object> <!-- End of main_stack -->
+          <packing>
+            <property name="pack-type">end</property>
+          </packing>
         </child>
-    </object> <!-- End of sudoku_app -->
+      </object> <!-- End of vbox -->
+    </child>
+  </object> <!-- End of sudoku_app -->
 </interface>
diff --git a/data/print-dialog.ui b/data/print-dialog.ui
index b21720c..b4f54bf 100644
--- a/data/print-dialog.ui
+++ b/data/print-dialog.ui
@@ -5,25 +5,25 @@
   <object class="GtkAdjustment" id="adjustment1">
     <property name="lower">1</property>
     <property name="upper">100</property>
-    <property name="step_increment">1</property>
-    <property name="page_increment">10</property>
+    <property name="step-increment">1</property>
+    <property name="page-increment">10</property>
   </object>
   <template class="PrintDialog" parent="GtkDialog">
     <property name="title" translatable="yes">Print Multiple Puzzles</property>
-    <property name="can_focus">False</property>
+    <property name="can-focus">False</property>
     <property name="resizable">False</property>
-    <property name="type_hint">dialog</property>
-    <property name="width_request">460</property>
+    <property name="type-hint">dialog</property>
+    <property name="width-request">460</property>
     <property name="expand">False</property>
     <property name="modal">True</property>
     <child type="action">
       <object class="GtkButton" id="cancelbutton1">
         <property name="label" translatable="yes">_Cancel</property>
         <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="can_default">True</property>
-        <property name="receives_default">False</property>
-        <property name="use_underline">True</property>
+        <property name="can-focus">True</property>
+        <property name="can-default">True</property>
+        <property name="receives-default">False</property>
+        <property name="use-underline">True</property>
         <property name="valign">center</property>
       </object>
     </child>
@@ -31,42 +31,42 @@
       <object class="GtkButton" id="print_button">
         <property name="label" translatable="yes">_Print</property>
         <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="can_default">True</property>
-        <property name="receives_default">False</property>
-        <property name="use_underline">True</property>
+        <property name="can-focus">True</property>
+        <property name="can-default">True</property>
+        <property name="receives-default">False</property>
+        <property name="use-underline">True</property>
         <property name="valign">center</property>
       </object>
     </child>
     <child internal-child="vbox">
       <object class="GtkBox">
         <property name="visible">True</property>
-        <property name="can_focus">False</property>
+        <property name="can-focus">False</property>
         <property name="orientation">vertical</property>
         <child>
           <object class="GtkBox" id="print_box">
             <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <property name="border_width">12</property>
+            <property name="can-focus">False</property>
+            <property name="border-width">12</property>
             <property name="spacing">18</property>
             <property name="margin">6</property>
             <property name="orientation">vertical</property>
             <child>
               <object class="GtkBox">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
+                <property name="can-focus">False</property>
                 <property name="spacing">10</property>
                 <child>
-                  <object class="GtkBox" id="number_label_box">
+                  <object class="GtkBox">
                     <property name="visible">True</property>
-                    <property name="width_request">150</property>
+                    <property name="width-request">150</property>
                     <child>
-                      <object class="GtkLabel" id="number_label">
+                      <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="label" translatable="yes">_Number of puzzles</property>
-                        <property name="use_underline">True</property>
-                        <property name="mnemonic_widget">n_sudokus_button</property>
+                        <property name="use-underline">True</property>
+                        <property name="mnemonic-widget">n_sudokus_button</property>
                         <property name="valign">center</property>
                         <property name="halign">end</property>
                       </object>
@@ -80,32 +80,32 @@
                 <child>
                   <object class="GtkSpinButton" id="n_sudokus_button">
                     <property name="visible">True</property>
-                    <property name="can_focus">True</property>
+                    <property name="can-focus">True</property>
                     <property name="halign">center</property>
-                    <property name="primary_icon_activatable">False</property>
-                    <property name="secondary_icon_activatable">False</property>
-                    <property name="primary_icon_sensitive">True</property>
-                    <property name="secondary_icon_sensitive">True</property>
+                    <property name="primary-icon-activatable">False</property>
+                    <property name="secondary-icon-activatable">False</property>
+                    <property name="primary-icon-sensitive">True</property>
+                    <property name="secondary-icon-sensitive">True</property>
                     <property name="adjustment">adjustment1</property>
-                    <property name="climb_rate">1</property>
+                    <property name="climb-rate">1</property>
                     <property name="valign">center</property>
                   </object>
                 </child>
               </object>
             </child>
             <child>
-              <object class="GtkBox" id="difficulty_box">
+              <object class="GtkBox">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
+                <property name="can-focus">False</property>
                 <property name="spacing">10</property>
                 <child>
-                  <object class="GtkBox" id="difficulty_label_box">
+                  <object class="GtkBox">
                     <property name="visible">True</property>
-                    <property name="width_request">150</property>
+                    <property name="width-request">150</property>
                     <child>
-                      <object class="GtkLabel" id="difficulty_label">
+                      <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="valign">start</property>
                         <property name="label" translatable="yes">Difficulty</property>
                         <property name="halign">end</property>
@@ -118,7 +118,7 @@
                   </object>
                 </child>
                 <child>
-                  <object class="GtkBox" id="vbox2">
+                  <object class="GtkBox">
                     <property name="visible">True</property>
                     <property name="orientation">vertical</property>
                     <property name="homogeneous">True</property>
@@ -129,11 +129,11 @@
                       <object class="GtkRadioButton" id="easy_radio_button">
                         <property name="label" translatable="yes">_Easy</property>
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">False</property>
+                        <property name="can-focus">True</property>
+                        <property name="receives-default">False</property>
                         <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | 
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
-                        <property name="use_underline">True</property>
-                        <property name="draw_indicator">True</property>
+                        <property name="use-underline">True</property>
+                        <property name="draw-indicator">True</property>
                       </object>
                       <packing>
                         <property name="expand">True</property>
@@ -145,11 +145,11 @@
                       <object class="GtkRadioButton" id="medium_radio_button">
                         <property name="label" translatable="yes">_Medium</property>
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">False</property>
+                        <property name="can-focus">True</property>
+                        <property name="receives-default">False</property>
                         <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | 
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
-                        <property name="use_underline">True</property>
-                        <property name="draw_indicator">True</property>
+                        <property name="use-underline">True</property>
+                        <property name="draw-indicator">True</property>
                         <property name="group">easy_radio_button</property>
                       </object>
                       <packing>
@@ -162,11 +162,11 @@
                       <object class="GtkRadioButton" id="hard_radio_button">
                         <property name="label" translatable="yes">_Hard</property>
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
+                        <property name="can-focus">True</property>
                         <property name="receives_default">False</property>
                         <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | 
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
-                        <property name="use_underline">True</property>
-                        <property name="draw_indicator">True</property>
+                        <property name="use-underline">True</property>
+                        <property name="draw-indicator">True</property>
                         <property name="group">easy_radio_button</property>
                       </object>
                       <packing>
@@ -179,11 +179,11 @@
                       <object class="GtkRadioButton" id="very_hard_radio_button">
                         <property name="label" translatable="yes">_Very Hard</property>
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
+                        <property name="can-focus">True</property>
                         <property name="receives_default">False</property>
                         <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | 
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
-                        <property name="use_underline">True</property>
-                        <property name="draw_indicator">True</property>
+                        <property name="use-underline">True</property>
+                        <property name="draw-indicator">True</property>
                         <property name="group">easy_radio_button</property>
                       </object>
                       <packing>


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