Add About/Info dialog (implement #26)

data/gtk.glade

@@ -1307,4 +1307,49 @@
       <class name="bg-texture"/>
     </style>
   </object>
+  <object class="GtkAboutDialog" id="info-dialog">
+    <property name="can_focus">False</property>
+    <property name="resizable">False</property>
+    <property name="modal">True</property>
+    <property name="window_position">center</property>
+    <property name="type_hint">dialog</property>
+    <property name="gravity">center</property>
+    <property name="transient_for">appwindow</property>
+    <property name="program_name">CoverGrid</property>
+    <property name="version">0.6</property>
+    <property name="comments" translatable="yes">CoverGrid is a client for the Music Player Daemon, focused on albums instead of single tracks.</property>
+    <property name="website">http://www.coderkun.de/codes/mcg</property>
+    <property name="logo">mcg.svg</property>
+    <property name="license_type">gpl-3-0</property>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <child internal-child="action_area">
+          <object class="GtkButtonBox">
+            <property name="can_focus">False</property>
+            <property name="layout_style">end</property>
+            <child>
+              <placeholder/>
+            </child>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <placeholder/>
+        </child>
+      </object>
+    </child>
+    <child>
+      <placeholder/>
+    </child>
+  </object>
 </interface>

data/menu.ui

@@ -47,6 +47,11 @@
             </item>
         </section>
         <section>
+            <item>
+                <attribute name="action">app.info</attribute>
+                <attribute name="label" translatable="yes">Info</attribute>
+                <attribute name="accel">&lt;Primary&gt;i</attribute>
+            </item>
             <item>
                 <attribute name="action">app.quit</attribute>
                 <attribute name="label" translatable="yes">_Quit</attribute>

mcg/application.py

@@ -32,7 +32,8 @@ class Application(Gtk.Application):
     def __init__(self):
         Gtk.Application.__init__(self, application_id=Application.ID, flags=Gio.ApplicationFlags.FLAGS_NONE)
         self._window = None
-        self._verbosity = self._verbosity = logging.WARNING
+        self._info_dialog = None
+        self._verbosity = logging.WARNING
         self.add_main_option_entries([
             Application._get_option("v", "verbose", "Be verbose: show info messages"),
             Application._get_option("d", "debug", "Enable debugging: show debug messages")
@@ -67,6 +68,12 @@ class Application(Gtk.Application):
         self._window.present()
 
 
+    def on_menu_info(self, action, value):
+        if not self._info_dialog:
+            self._info_dialog = widgets.InfoDialog(self._builder)
+        self._info_dialog.run()
+
+
     def on_menu_quit(self, action, value):
         self.quit()
 
@@ -112,6 +119,9 @@ class Application(Gtk.Application):
 
 
     def _setup_actions(self):
+        action = Gio.SimpleAction.new("info", None)
+        action.connect('activate', self.on_menu_info)
+        self.add_action(action)
         action = Gio.SimpleAction.new("quit", None)
         action.connect('activate', self.on_menu_quit)
         self.add_action(action)

mcg/widgets.py

@@ -24,6 +24,38 @@ from mcg.zeroconf import ZeroconfProvider
 
 
 
+class InfoDialog():
+
+
+    def __init__(self, builder):
+        self._logger = logging.getLogger(__name__)
+
+        # Widgets
+        self._info_dialog = builder.get_object('info-dialog')
+        self._resize_logo()
+
+
+    def get(self):
+        return self._info_dialog
+
+
+    def run(self):
+        self._info_dialog.run()
+        self._info_dialog.hide()
+
+
+    def _resize_logo(self):
+        try:
+            logo_pixbuf = self._info_dialog.get_logo()
+            self._info_dialog.set_logo(
+                logo_pixbuf.scale_simple(256, 256, GdkPixbuf.InterpType.HYPER)
+            )
+        except:
+            self._logger.warn("Failed to resize logo")
+
+
+
+
 class Window():
     SETTING_HOST = 'host'
     SETTING_PORT = 'port'