[gnome-music/wip/jfelder/searchbar-child: 6/10] window: Introduce search_mode_allowed property

[Jean Felder <jfelder src gnome org>]

commit 9deaf40bd0ba4f66f1bf249b4040a6b352dc351b
Author: Jean Felder <jfelder src gnome org>
Date:   Thu Nov 15 22:54:01 2018 +0100

    window: Introduce search_mode_allowed property
    
    Search mode cannot be changed if the search is in CHILD state.

 gnomemusic/widgets/headerbar.py |  6 +++---
 gnomemusic/window.py            | 12 +++++++++---
 2 files changed, 12 insertions(+), 6 deletions(-)
---
diff --git a/gnomemusic/widgets/headerbar.py b/gnomemusic/widgets/headerbar.py
index 3b362982..f72305b1 100644
--- a/gnomemusic/widgets/headerbar.py
+++ b/gnomemusic/widgets/headerbar.py
@@ -98,6 +98,7 @@ class HeaderBar(Gtk.HeaderBar):
     _back_button = Gtk.Template.Child()
     _menu_button = Gtk.Template.Child()
 
+    search_mode_allowed = GObject.Property(type=bool, default=True)
     search_mode_enabled = GObject.Property(type=bool, default=False)
     selected_items_count = GObject.Property(type=int, default=0, minimum=0)
     selection_mode_allowed = GObject.Property(type=bool, default=True)
@@ -143,6 +144,8 @@ class HeaderBar(Gtk.HeaderBar):
             "search-mode-enabled", self._search_button, "active",
             GObject.BindingFlags.BIDIRECTIONAL
             | GObject.BindingFlags.SYNC_CREATE)
+        self.bind_property(
+            "search-mode-allowed", self._search_button, "visible")
 
         self.connect(
             "notify::selection-mode-allowed",
@@ -193,9 +196,6 @@ class HeaderBar(Gtk.HeaderBar):
         self._state = value
         self._update()
 
-        search_visible = self.props.state != HeaderBar.State.SEARCH
-        self._search_button.props.visible = search_visible
-
         if value == HeaderBar.State.EMPTY:
             self._search_button.props.sensitive = False
             self._select_button.props.sensitive = False
diff --git a/gnomemusic/window.py b/gnomemusic/window.py
index c2c9ab8d..2e12e72a 100644
--- a/gnomemusic/window.py
+++ b/gnomemusic/window.py
@@ -64,6 +64,7 @@ class Window(Gtk.ApplicationWindow):
 
     selected_items_count = GObject.Property(type=int, default=0, minimum=0)
     selection_mode = GObject.Property(type=bool, default=False)
+    search_mode_allowed = GObject.Property(type=bool, default=True)
 
     def __repr__(self):
         return '<Window>'
@@ -141,6 +142,8 @@ class Window(Gtk.ApplicationWindow):
             'back-button-clicked', self._switch_back_from_childview)
 
         self.connect('notify::selection-mode', self._on_selection_mode_changed)
+        self.bind_property(
+            'search-mode-allowed', self._headerbar, 'search-mode-allowed')
         self.bind_property(
             'selected-items-count', self._headerbar, 'selected-items-count')
         self.bind_property(
@@ -303,7 +306,7 @@ class Window(Gtk.ApplicationWindow):
             # Open search bar on Ctrl + F
             if (keyval == Gdk.KEY_f
                     and not self.views[View.PLAYLIST].rename_active
-                    and self._headerbar.props.state != HeaderBar.State.SEARCH):
+                    and self.props.search_mode_allowed):
                 search_enabled = self._searchbar.props.search_mode_enabled
                 self._searchbar.props.search_mode_enabled = not search_enabled
             # Play / Pause on Ctrl + SPACE
@@ -387,7 +390,7 @@ class Window(Gtk.ApplicationWindow):
                 and (modifiers == shift_mask
                      or modifiers == 0)
                 and not self.views[View.PLAYLIST].rename_active
-                and self._headerbar.props.state != HeaderBar.State.SEARCH):
+                and self.props.search_mode_allowed):
             self._searchbar.props.search_mode_enabled = True
 
     @log
@@ -444,10 +447,13 @@ class Window(Gtk.ApplicationWindow):
 
     @log
     def _on_search_state_changed(self, klass, data):
+        search_state = self._searchbar.props.search_state
+        self.props.search_mode_allowed = (search_state != Search.State.CHILD)
+
         # Get back to the view before the search if curr_view has not already
         # been changed by a keyboard shortcut.
         search_views = [self.views[View.SEARCH], self.views[View.EMPTY]]
-        if (self._searchbar.props.search_state == Search.State.NONE
+        if (search_state == Search.State.NONE
                 and self.curr_view in search_views):
             self._stack.set_visible_child(
                 self.views[View.SEARCH].previous_view)