examples: gst-camera: update to GTK3

When opening the .ui file it complains about being for GTK 2 and
automatically updates it to GTK3. Commit this version and update
the makefile

tests/examples/camerabin2/Makefile.am

@@ -2,7 +2,7 @@ GST_CAMERABIN_UI_FILES = gst-camera2.ui
 
 AM_CPPFLAGS = -DCAMERA_APPS_UIDIR=\""$(srcdir)"\"
 
-if HAVE_GTK
+if HAVE_GTK3
 
 GST_CAMERABIN_GTK_EXAMPLES = gst-camera2
 
@@ -10,7 +10,7 @@ gst_camera2_SOURCES = gst-camera2.h gst-camera2.c
 gst_camera2_CFLAGS  = \
         $(GST_PLUGINS_BAD_CFLAGS) \
         $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS) \
-	$(GTK_CFLAGS) \
+	$(GTK3_CFLAGS) \
 	$(GMODULE_EXPORT_CFLAGS) \
         -DGST_USE_UNSTABLE_API
 gst_camera2_LDADD   = \
@@ -21,7 +21,7 @@ gst_camera2_LDADD   = \
         -lgstpbutils-@GST_API_VERSION@ \
 	-lgstvideo-@GST_API_VERSION@ \
         $(GST_LIBS) \
-	$(GTK_LIBS) \
+	$(GTK3_LIBS) \
 	$(GMODULE_EXPORT_LIBS)
 
 noinst_DATA = $(GST_CAMERABIN_UI_FILES)

tests/examples/camerabin2/gst-camera2.c

@@ -170,9 +170,7 @@ on_videoRButton_toggled (GtkToggleButton * button, gpointer user_data)
 void
 on_viewfinderArea_realize (GtkWidget * widget, gpointer data)
 {
-#if GTK_CHECK_VERSION (2, 18, 0)
   gdk_window_ensure_native (gtk_widget_get_window (widget));
-#endif
 }
 
 void
@@ -219,11 +217,7 @@ bus_sync_callback (GstBus * bus, GstMessage * message, gpointer data)
   /* FIXME: make sure to get XID in main thread */
   ui_drawing = GTK_WIDGET (gtk_builder_get_object (builder, "viewfinderArea"));
   gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (message->src),
-#if GTK_CHECK_VERSION (2, 91, 6)
       GDK_WINDOW_XID (gtk_widget_get_window (ui_drawing)));
-#else
-      GDK_WINDOW_XWINDOW (gtk_widget_get_window (ui_drawing)));
-#endif
 
   gst_message_unref (message);
   return GST_BUS_DROP;
@@ -276,7 +270,6 @@ bus_callback (GstBus * bus, GstMessage * message, gpointer data)
 static gboolean
 init_gtkwidgets_data (void)
 {
-#if GTK_CHECK_VERSION(2,24,0)
   gint i;
   GtkComboBoxText *combobox =
       GTK_COMBO_BOX_TEXT (gtk_builder_get_object (builder, "formatComboBox"));
@@ -291,10 +284,6 @@ init_gtkwidgets_data (void)
   /* default to the first one -> ogg */
   gtk_combo_box_set_active (GTK_COMBO_BOX (combobox), 0);
   return TRUE;
-#else
-  g_warning ("This needs a newer version of GTK (2.24 at least)");
-  return FALSE;
-#endif
 }
 
 int

tests/examples/camerabin2/gst-camera2.ui

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.18.3 -->
 <interface>
-  <requires lib="gtk+" version="2.16"/>
+  <requires lib="gtk+" version="3.0"/>
   <object class="GtkWindow" id="mainWindow">
     <property name="can_focus">False</property>
     <property name="default_width">800</property>
@@ -21,7 +22,7 @@
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">False</property>
-                <property name="use_action_appearance">False</property>
+                <property name="xalign">0.5</property>
                 <property name="active">True</property>
                 <property name="draw_indicator">True</property>
                 <signal name="toggled" handler="on_imageRButton_toggled" swapped="no"/>
@@ -39,7 +40,7 @@
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">False</property>
-                <property name="use_action_appearance">False</property>
+                <property name="xalign">0.5</property>
                 <property name="active">True</property>
                 <property name="draw_indicator">True</property>
                 <property name="group">imageRButton</property>
@@ -97,7 +98,6 @@
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">True</property>
-                    <property name="use_action_appearance">False</property>
                     <signal name="clicked" handler="on_captureButton_clicked" swapped="no"/>
                   </object>
                   <packing>
@@ -113,7 +113,6 @@
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">True</property>
-                    <property name="use_action_appearance">False</property>
                     <signal name="clicked" handler="on_stopCaptureButton_clicked" swapped="no"/>
                   </object>
                   <packing>