[gnome-music/wip/jfelder/playback-status-v3: 7/10] repeatbox: Introduce RepeatBox widget

[Jean Felder <jfelder src gnome org>]

commit 29dac0d4f545fc207c181a8a966f46c0365d9911
Author: Jean Felder <jfelder src gnome org>
Date:   Mon Sep 10 08:40:52 2018 +0200

    repeatbox: Introduce RepeatBox widget
    
    This widget displays all the possible repeat mode into a single
    horizontal box. It allows to change the repeat mode by pressing on the
    corresponding button. It will be used by PlaybackPopover widget.

 data/org.gnome.Music.gresource.xml |  1 +
 data/ui/RepeatBox.ui               | 71 ++++++++++++++++++++++++++++++++
 gnomemusic/widgets/repeatbox.py    | 83 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 155 insertions(+)
---
diff --git a/data/org.gnome.Music.gresource.xml b/data/org.gnome.Music.gresource.xml
index 200159ae..97e2dfbd 100644
--- a/data/org.gnome.Music.gresource.xml
+++ b/data/org.gnome.Music.gresource.xml
@@ -19,6 +19,7 @@
     <file preprocess="xml-stripblanks">ui/PlaylistContextMenu.ui</file>
     <file preprocess="xml-stripblanks">ui/PlaylistControls.ui</file>
     <file preprocess="xml-stripblanks">ui/PlaylistDialog.ui</file>
+    <file preprocess="xml-stripblanks">ui/RepeatBox.ui</file>
     <file preprocess="xml-stripblanks">ui/Searchbar.ui</file>
     <file preprocess="xml-stripblanks">ui/SelectionBarMenuButton.ui</file>
     <file preprocess="xml-stripblanks">ui/SelectionToolbar.ui</file>
diff --git a/data/ui/RepeatBox.ui b/data/ui/RepeatBox.ui
new file mode 100644
index 00000000..4b9b3b8a
--- /dev/null
+++ b/data/ui/RepeatBox.ui
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <template class="RepeatBox" parent="GtkBox">
+    <property name="visible">True</property>
+    <property name="orientation">horizontal</property>
+    <property name="homogeneous">True</property>
+    <property name="halign">center</property>
+    <property name="margin_top">6</property>
+    <property name="margin_bottom">6</property>
+    <child>
+      <object class="GtkToggleButton" id="_linear_mode_button">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="receives_default">True</property>
+        <property name="image">linear_mode_image</property>
+        <property name="always_show_image">True</property>
+        <signal name="toggled" handler="_repeat_button_clicked" swapped="no"/>
+      </object>
+    </child>
+    <child>
+      <object class="GtkToggleButton" id="_repeat_song_mode_button">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="receives_default">True</property>
+        <property name="image">repeat_song_mode_image</property>
+        <property name="always_show_image">True</property>
+        <signal name="toggled" handler="_repeat_button_clicked" swapped="no"/>
+      </object>
+    </child>
+    <child>
+      <object class="GtkToggleButton" id="_repeat_all_mode_button">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="receives_default">True</property>
+        <property name="image">repeat_all_mode_image</property>
+        <property name="always_show_image">True</property>
+        <signal name="toggled" handler="_repeat_button_clicked" swapped="no"/>
+      </object>
+    </child>
+    <child>
+      <object class="GtkToggleButton" id="_shuffle_mode_button">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="receives_default">True</property>
+        <property name="image">shuffle_mode_image</property>
+        <property name="always_show_image">True</property>
+        <signal name="toggled" handler="_repeat_button_clicked" swapped="no"/>
+      </object>
+    </child>
+  </template>
+  <object class="GtkImage" id="linear_mode_image">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="icon_name">media-playlist-consecutive-symbolic</property>
+  </object>
+  <object class="GtkImage" id="shuffle_mode_image">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="icon_name">media-playlist-shuffle-symbolic</property>
+  </object>nn
+  <object class="GtkImage" id="repeat_all_mode_image">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="icon_name">media-playlist-repeat-symbolic</property>
+  </object>
+  <object class="GtkImage" id="repeat_song_mode_image">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="icon_name">media-playlist-repeat-song-symbolic-rtl</property>
+  </object>
+</interface>
diff --git a/gnomemusic/widgets/repeatbox.py b/gnomemusic/widgets/repeatbox.py
new file mode 100644
index 00000000..2d72204a
--- /dev/null
+++ b/gnomemusic/widgets/repeatbox.py
@@ -0,0 +1,83 @@
+# Copyright 2019 The GNOME Music developers
+#
+# GNOME Music is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# GNOME Music is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with GNOME Music; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# The GNOME Music authors hereby grant permission for non-GPL compatible
+# GStreamer plugins to be used and distributed together with GStreamer
+# and GNOME Music.  This permission is above and beyond the permissions
+# granted by the GPL license by which GNOME Music is covered.  If you
+# modify this code, you may extend this exception to your version of the
+# code, but you are not obligated to do so.  If you do not wish to do so,
+# delete this exception statement from your version.
+
+from gi.repository import Gtk
+
+from gnomemusic import log
+from gnomemusic.player import RepeatMode
+
+
+@Gtk.Template(resource_path='/org/gnome/Music/ui/RepeatBox.ui')
+class RepeatBox(Gtk.Box):
+
+    __gtype_name__ = 'RepeatBox'
+
+    _linear_mode_button = Gtk.Template.Child()
+    _shuffle_mode_button = Gtk.Template.Child()
+    _repeat_all_mode_button = Gtk.Template.Child()
+    _repeat_song_mode_button = Gtk.Template.Child()
+
+    def __repr__(self):
+        return '<RepeatBox>'
+
+    def __init__(self, player):
+        super().__init__()
+
+        self._player = player
+        self._player.connect(
+            'notify::repeat-mode', self._on_repeat_mode_changed)
+
+        self._buttons = {
+            self._linear_mode_button: RepeatMode.NONE,
+            self._shuffle_mode_button: RepeatMode.SHUFFLE,
+            self._repeat_all_mode_button: RepeatMode.ALL,
+            self._repeat_song_mode_button: RepeatMode.SONG
+        }
+        self._on_repeat_mode_changed(self._player)
+
+    @log
+    def _on_repeat_mode_changed(self, klass, param=None):
+        repeat_mode = self._player.props.repeat_mode
+        button_index = list(self._buttons.values()).index(repeat_mode)
+        button = list(self._buttons.keys())[button_index]
+        self._activate_button(button)
+
+    @Gtk.Template.Callback()
+    @log
+    def _repeat_button_clicked(self, klass):
+        self._activate_button(klass)
+        self._player.props.repeat_mode = self._buttons[klass]
+
+    @log
+    def _activate_button(self, button_to_activate):
+        for button in self._buttons:
+            button.handler_block_by_func(self._repeat_button_clicked)
+            if (button != button_to_activate
+                    and button.props.active):
+                button.props.active = False
+
+        button_to_activate.props.active = True
+
+        for button in self._buttons:
+            button.handler_unblock_by_func(self._repeat_button_clicked)