fixup! Port UI to GTK 4

data/gtk.css

@@ -30,6 +30,10 @@
     font-weight:bold;
 }
 
+window.fullscreen #cover_box {
+    background: black;
+}
+
 #cover_info_revealer {
     background-color:alpha(@theme_bg_color, 0.8);
     box-shadow:0 0 10px @theme_bg_color;

data/ui/cover-panel.ui

@@ -41,6 +41,7 @@
                         <property name="valign">fill</property>
                         <child>
                             <object class="GtkViewport" id="cover_box">
+                                <property name="name">cover_box</property>
                                 <property name="hexpand">true</property>
                                 <property name="halign">fill</property>
                                 <property name="vexpand">true</property>
@@ -53,9 +54,6 @@
                                         <property name="valign">fill</property>
                                         <property name="icon-name">image-x-generic-symbolic</property>
                                         <property name="icon-size">large</property>
-                                        <!--
-                                        <signal name="button-press-event" handler="on_cover_box_pressed" swapped="no"/>
-                                        -->
                                     </object>
                                 </child>
                             </object>
@@ -81,9 +79,6 @@
                 <property name="transition-type">slide-right</property>
                 <property name="name">cover_info_revealer</property>
                 <style>
-                    <!--
-                    <class name="sidebar"/>
-                    -->
                     <class name="background"/>
                 </style>
                 <child>

src/coverpanel.py

@@ -63,6 +63,11 @@ class CoverPanel(Gtk.Overlay):
         # Initial actions
         GObject.idle_add(self._enable_tracklist)
 
+        # Click handler for image
+        clickController = Gtk.GestureClick()
+        clickController.connect('pressed', self.on_cover_box_pressed)
+        self.cover_box.add_controller(clickController)
+
 
     def get_toolbar(self):
         return self.toolbar
@@ -72,11 +77,9 @@ class CoverPanel(Gtk.Overlay):
         pass
 
 
-    # FIXME on_cover_box_pressed()
-    #@Gtk.Template.Callback()
-    #def on_cover_box_pressed(self, widget, event):
-    #    if self._current_album and event.type == Gdk.EventType._2BUTTON_PRESS:
-    #       self.emit('toggle-fullscreen')
+    def on_cover_box_pressed(self, widget, npress, x, y):
+        if self._current_album and npress == 2:
+            self.emit('toggle-fullscreen')
 
 
     def set_width(self, width):
@@ -150,13 +153,12 @@ class CoverPanel(Gtk.Overlay):
     def set_fullscreen(self, active):
         if active:
             self.info_revealer.set_reveal_child(False)
-            self.cover_box.override_background_color(Gtk.StateFlags.NORMAL, Gdk.RGBA(0, 0, 0, 1))
             GObject.idle_add(self._resize_image)
             self._fullscreened = True
         else:
             self._fullscreened = False
-            self.info_revealer.set_reveal_child(True)
-            self.cover_box.override_background_color(Gtk.StateFlags.NORMAL, Gdk.RGBA(0, 0, 0, 0))
+            if self._current_album:
+                self.info_revealer.set_reveal_child(True)
             GObject.idle_add(self._resize_image)
 
 
@@ -171,7 +173,6 @@ class CoverPanel(Gtk.Overlay):
                     self._cover_pixbuf = None
             else:
                 # Reset image
-                self._cover_pixbuf = self._get_default_image()
                 self._cover_pixbuf = None
             self._current_size = None
             self._current_cover_album = album
@@ -205,7 +206,8 @@ class CoverPanel(Gtk.Overlay):
     def _enable_tracklist(self):
         if self._current_album:
             # enable
-            self.info_revealer.set_reveal_child(True)
+            if not self._fullscreened:
+                self.info_revealer.set_reveal_child(True)
         else:
             # disable
             self.info_revealer.set_reveal_child(False)

src/window.py

@@ -230,7 +230,7 @@ class Window(Adw.ApplicationWindow):
 
 
     def on_menu_toggle_fullscreen(self, action, value):
-        self.panel_stack.set_visible_child(self.cover_panel_page)
+        self.panel_stack.set_visible_child(self._cover_panel)
         if not self._state.get_property(WindowState.IS_FULLSCREENED):
             self.fullscreen()
         else:
@@ -259,7 +259,7 @@ class Window(Adw.ApplicationWindow):
 
 
     def on_fullscreened(self, widget, fullscreened):
-        self._fullscreen(fullscreened is True)
+        self._fullscreen(self.is_fullscreen())
 
 
     # HeaderBar callbacks
@@ -544,17 +544,11 @@ class Window(Adw.ApplicationWindow):
             if self._state.get_property(WindowState.IS_FULLSCREENED):
                 self.headerbar.hide()
                 self._cover_panel.set_fullscreen(True)
-                # Hide cursor
-                self.get_window().set_cursor(
-                    Gdk.Cursor.new_from_name(Gdk.Display.get_default(), "none")
-                )
+                self.set_cursor(Gdk.Cursor.new_from_name("none", None))
             else:
                 self.headerbar.show()
                 self._cover_panel.set_fullscreen(False)
-                # Reset cursor
-                self.get_window().set_cursor(
-                    Gdk.Cursor.new_from_name(Gdk.Display.get_default(), "default")
-                )
+                self.set_cursor(Gdk.Cursor.new_from_name("default", None))
 
 
     def _save_visible_panel(self):