[glade] GtkPopover: rework support code to fix bugs and warnings

[Juan Pablo Ugarte <jpu src gnome org>]

commit d2bedbab24c64198b373345e973d00e1f9fdc33c
Author: Juan Pablo Ugarte <juanpablougarte gmail com>
Date:   Sat Feb 24 21:51:31 2018 -0300

    GtkPopover: rework support code to fix bugs and warnings
    
    Use a derived class with overrided methods for the runtime
    
    Fix bug #793757 "Gtk-CRITICAL **: _gtk_window_add_popover: assertion '_gtk_widget_get_parent (popover) == 
NULL' failed"

 plugins/gtk+/glade-gtk-popover.c |   84 ++++++++++++++++++++++++++++----------
 plugins/gtk+/gtk+.xml.in         |   11 ++++-
 2 files changed, 71 insertions(+), 24 deletions(-)
---
diff --git a/plugins/gtk+/glade-gtk-popover.c b/plugins/gtk+/glade-gtk-popover.c
index 82f0056..8a88f8e 100644
--- a/plugins/gtk+/glade-gtk-popover.c
+++ b/plugins/gtk+/glade-gtk-popover.c
@@ -27,6 +27,68 @@
 
 #include "glade-popover-editor.h"
 
+#define GLADE_TYPE_GTK_POPOVER glade_gtk_popover_get_type ()
+G_DECLARE_FINAL_TYPE (GladeGtkPopover, glade_gtk_popover, GLADE, GTK_POPOVER, GtkPopover)
+
+struct _GladeGtkPopover
+{
+  GtkPopover parent_instance;
+};
+
+G_DEFINE_TYPE (GladeGtkPopover, glade_gtk_popover, GTK_TYPE_POPOVER)
+
+static void
+glade_gtk_popover_init (GladeGtkPopover *popover)
+{
+  gtk_popover_set_modal (GTK_POPOVER (popover), FALSE);
+  gtk_popover_set_relative_to (GTK_POPOVER (popover), NULL);
+}
+
+static void
+glade_gtk_popover_map (GtkWidget *widget)
+{
+  GtkWidgetClass *klass = g_type_class_peek_parent (glade_gtk_popover_parent_class);
+  klass->map (widget);
+}
+
+static void
+glade_gtk_popover_unmap (GtkWidget *widget)
+{
+  GtkWidgetClass *klass = g_type_class_peek_parent (glade_gtk_popover_parent_class);
+  klass->unmap (widget);
+}
+
+static gboolean
+glade_gtk_popover_button_event (GtkWidget *widget, GdkEventButton *event)
+{
+  return TRUE;
+}
+
+static gint
+glade_gtk_popover_key_press_event (GtkWidget *popover, GdkEventKey *event)
+{
+  if (event->keyval == GDK_KEY_Escape)
+    return TRUE;
+
+  return FALSE;
+}
+
+static void
+glade_gtk_popover_class_init (GladeGtkPopoverClass *klass)
+{
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  /* Ignore some events causing the popover to disappear from the workspace */
+  widget_class->key_press_event = glade_gtk_popover_key_press_event;
+  widget_class->button_press_event = glade_gtk_popover_button_event;
+  widget_class->button_release_event = glade_gtk_popover_button_event;
+
+  /* Make some warning go away */
+  widget_class->map = glade_gtk_popover_map;
+  widget_class->unmap = glade_gtk_popover_unmap;
+}
+
+
 GObject *
 glade_gtk_popover_constructor (GType type,
                                guint n_construct_properties,
@@ -56,25 +118,3 @@ glade_gtk_popover_create_editable (GladeWidgetAdaptor * adaptor,
     return GWA_GET_CLASS (GTK_TYPE_CONTAINER)->create_editable (adaptor, type);
 }
 
-static gint
-popover_key_press (GtkWidget   *popover,
-                  GdkEventKey *event,
-                  gpointer     user_data)
-{
-  if (event->keyval == GDK_KEY_Escape)
-    return TRUE;
-
-  return FALSE;
-}
-                  
-void
-glade_gtk_popover_post_create (GladeWidgetAdaptor * adaptor,
-                              GObject *popover, GladeCreateReason reason)
-{
-  /* Ignore some events causing the popover to disappear from the workspace
-   */
-  g_signal_connect (popover, "key-press-event",
-                   G_CALLBACK (popover_key_press), NULL);
-
-  GWA_GET_CLASS (GTK_TYPE_CONTAINER)->post_create (adaptor, popover, reason);
-}
diff --git a/plugins/gtk+/gtk+.xml.in b/plugins/gtk+/gtk+.xml.in
index 29d7251..80030e1 100644
--- a/plugins/gtk+/gtk+.xml.in
+++ b/plugins/gtk+/gtk+.xml.in
@@ -3042,6 +3042,8 @@
           <property id="menu-model" disabled="True"/>
           <property id="popup" ignore="True"/>
           <property id="align-widget" ignore="True"/>
+          <property id="popover" ignore="True" since="3.12"/>
+          <property id="use-popover" ignore="True" since="3.12"/>
         </properties>
       </glade-widget-class>
 
@@ -3507,13 +3509,18 @@
         </packing-properties>
       </glade-widget-class>
       
-      <glade-widget-class name="GtkPopover" generic-name="popover" _title="Popover" toplevel="True" 
since="3.12">
+      <glade-widget-class name="GtkPopover"
+                          get-type-function="glade_gtk_popover_get_type"
+                          generic-name="popover"
+                          _title="Popover"
+                          toplevel="True"
+                          since="3.12">
         <constructor-function>glade_gtk_popover_constructor</constructor-function>
         <create-editable-function>glade_gtk_popover_create_editable</create-editable-function>
-        <post-create-function>glade_gtk_popover_post_create</post-create-function>
         <properties>
           <property id="visible" default="False"/>
           <property id="relative-to" ignore="True" custom-layout="True"/>
+          <property id="pointing-to" disabled="True"/>
           <property id="constrain-to" ignore="True" custom-layout="True" since="3.20">
             <displayable-values>
               <!-- GtkPopoverConstraint enumeration value -->