reworking of yt dialog

app/ui/iptv.glade

@@ -1231,17 +1231,20 @@ Author: Dmitriy Yefremov
   <object class="GtkWindow" id="yt_import_dialog_window">
     <property name="width_request">480</property>
     <property name="can_focus">False</property>
+    <property name="resizable">False</property>
     <property name="modal">True</property>
     <property name="window_position">center-on-parent</property>
+    <property name="default_width">480</property>
     <property name="destroy_with_parent">True</property>
     <property name="skip_taskbar_hint">True</property>
     <property name="skip_pager_hint">True</property>
     <property name="gravity">center</property>
-    <signal name="delete-event" handler="on_close" swapped="no"/>
     <child type="titlebar">
       <object class="GtkHeaderBar" id="yt_header_bar">
         <property name="visible">True</property>
-        <property name="can_focus">False</property>
+        <property name="can_focus">True</property>
+        <property name="title" translatable="yes">YouTube</property>
+        <property name="subtitle" translatable="yes">Playlist import</property>
         <property name="spacing">2</property>
         <property name="show_close_button">True</property>
         <child>
@@ -1252,7 +1255,6 @@ Author: Dmitriy Yefremov
             <property name="receives_default">True</property>
             <property name="tooltip_text" translatable="yes">Receive</property>
             <signal name="clicked" handler="on_receive" swapped="no"/>
-            <accelerator key="d" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
             <child>
               <object class="GtkImage" id="yt_receive_button_image">
                 <property name="visible">True</property>
@@ -1260,24 +1262,12 @@ Author: Dmitriy Yefremov
                 <property name="stock">gtk-goto-bottom</property>
               </object>
             </child>
+            <accelerator key="d" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
           </object>
           <packing>
             <property name="position">1</property>
           </packing>
         </child>
-        <child type="title">
-          <object class="GtkEntry" id="yt_url_entry">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="margin_left">2</property>
-            <property name="margin_right">2</property>
-            <property name="hexpand">True</property>
-            <property name="primary_icon_stock">gtk-edit</property>
-            <property name="secondary_icon_tooltip_text" translatable="yes">Link to YouTube resource.</property>
-            <property name="placeholder_text" translatable="yes">YouTube playlist URL:</property>
-            <signal name="changed" handler="on_yt_url_entry_changed" swapped="no"/>
-          </object>
-        </child>
         <child>
           <object class="GtkButton" id="yt_import_button">
             <property name="visible">True</property>
@@ -1286,7 +1276,6 @@ Author: Dmitriy Yefremov
             <property name="receives_default">True</property>
             <property name="tooltip_text" translatable="yes">Import</property>
             <signal name="clicked" handler="on_import" swapped="no"/>
-            <accelerator key="i" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
             <child>
               <object class="GtkImage" id="yt_import_button_image">
                 <property name="visible">True</property>
@@ -1294,6 +1283,7 @@ Author: Dmitriy Yefremov
                 <property name="icon_name">insert-link</property>
               </object>
             </child>
+            <accelerator key="i" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
           </object>
           <packing>
             <property name="pack_type">end</property>
@@ -1307,13 +1297,29 @@ Author: Dmitriy Yefremov
         <property name="visible">True</property>
         <property name="can_focus">False</property>
         <property name="orientation">vertical</property>
-        <property name="spacing">2</property>
+        <child>
+          <object class="GtkEntry" id="yt_url_entry">
+            <property name="visible">True</property>
+            <property name="can_focus">True</property>
+            <property name="margin_left">5</property>
+            <property name="margin_right">5</property>
+            <property name="margin_top">5</property>
+            <property name="margin_bottom">5</property>
+            <property name="primary_icon_stock">gtk-edit</property>
+            <property name="secondary_icon_tooltip_text" translatable="yes">Link to YouTube resource.</property>
+            <property name="placeholder_text" translatable="yes">YouTube playlist URL:</property>
+            <signal name="changed" handler="on_yt_url_entry_changed" swapped="no"/>
+          </object>
+          <packing>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
         <child>
           <object class="GtkScrolledWindow" id="yt_list_view_scrolled_window">
             <property name="can_focus">True</property>
             <property name="shadow_type">in</property>
             <property name="min_content_height">150</property>
-            <property name="max_content_height">480</property>
             <child>
               <object class="GtkTreeView" id="yt_list_view">
                 <property name="visible">True</property>
@@ -1372,7 +1378,6 @@ Author: Dmitriy Yefremov
                     <child>
                       <object class="GtkCellRendererToggle" id="yt_selected_renderer">
                         <property name="width">50</property>
-                        <signal name="toggled" handler="on_selected_toggled" swapped="no"/>
                       </object>
                       <attributes>
                         <attribute name="active">2</attribute>
@@ -1405,14 +1410,47 @@ Author: Dmitriy Yefremov
           <object class="GtkBox" id="yt_info_bar_box">
             <property name="height_request">24</property>
             <property name="can_focus">False</property>
+            <property name="margin_left">5</property>
+            <property name="margin_right">10</property>
             <property name="spacing">2</property>
             <child>
-              <placeholder/>
+              <object class="GtkBox" id="yt_cout_box">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="spacing">2</property>
+                <child>
+                  <object class="GtkImage" id="yt_count_image">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="stock">gtk-properties</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkLabel" id="yt_count_label">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="label">0</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">0</property>
+              </packing>
             </child>
             <child>
               <object class="GtkProgressBar" id="yt_progress_bar">
-                <property name="height_request">10</property>
-                <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="halign">center</property>
                 <property name="valign">center</property>
@@ -1424,9 +1462,6 @@ Author: Dmitriy Yefremov
                 <property name="position">1</property>
               </packing>
             </child>
-            <child>
-              <placeholder/>
-            </child>
           </object>
           <packing>
             <property name="expand">False</property>

app/ui/iptv.py

@@ -572,6 +572,7 @@ class YtListImportDialog:
         self._info_bar_box = builder.get_object("yt_info_bar_box")
         self._message_label = builder.get_object("yt_info_bar_message_label")
         self._info_bar = builder.get_object("yt_info_bar")
+        self._yt_count_label = builder.get_object("yt_count_label")
         self._url_entry = builder.get_object("yt_url_entry")
         self._receive_button = builder.get_object("yt_receive_button")
         self._import_button = builder.get_object("yt_import_button")
@@ -622,8 +623,10 @@ class YtListImportDialog:
             self.update_active_elements(True)
 
     def on_receive(self, item):
+        self.show_invisible_elements()
         self.update_active_elements(False)
         self._model.clear()
+        self._yt_count_label.set_text("0")
         self.on_info_bar_close()
         self.update_refs_list()
 
@@ -645,6 +648,9 @@ class YtListImportDialog:
         for l in links:
             yield self._model.append((l[0], l[1], True, None))
 
+        self._yt_count_label.set_text(str(len(self._model)))
+        yield True
+
     @run_idle
     def append_services(self, links):
         aggr = [None] * 9
@@ -666,11 +672,15 @@ class YtListImportDialog:
 
     @run_idle
     def update_active_elements(self, sensitive):
-        self._list_view_scrolled_window.set_visible(sensitive or not sensitive)
         self._url_entry.set_sensitive(sensitive)
         self._receive_button.set_sensitive(sensitive)
         self._import_button.set_sensitive(sensitive)
 
+    def show_invisible_elements(self):
+        self._list_view_scrolled_window.set_visible(True)
+        self._info_bar_box.set_visible(True)
+        self._dialog.set_resizable(True)
+
     def on_url_entry_changed(self, entry):
         url_str = entry.get_text()
         yt_id = YouTube.get_yt_list_id(url_str)
@@ -690,7 +700,7 @@ class YtListImportDialog:
 
     @run_idle
     def update_progress_bar(self, value):
-        self._info_bar_box.set_visible(value < 1)
+        self._progress_bar.set_visible(value < 1)
         self._progress_bar.set_fraction(value)
 
     @run_idle