--- /dev/null
+diff --git a/configure.in b/configure.in
+index 3ff66e0..2bc6847 100644
+--- a/configure.in
++++ b/configure.in
+@@ -75,9 +75,9 @@ dnl ***********************************
+ XDT_CHECK_PACKAGE([GLIB], [glib-2.0], [2.12.0])
+ XDT_CHECK_PACKAGE([GTHREAD], [gthread-2.0], [2.12.0])
+ XDT_CHECK_PACKAGE([GST_PLUGINS_BASE], [gstreamer-plugins-base-0.10], [0.10.2])
+-XDT_CHECK_PACKAGE([GTK], [gtk+-2.0], [2.10.0])
++XDT_CHECK_PACKAGE([GTK], [gtk+-2.0], [2.14.0])
+ XDT_CHECK_PACKAGE([LIBXFCE4UTIL], [libxfce4util-1.0], [4.6.0])
+-XDT_CHECK_PACKAGE([LIBXFCEGUI4], [libxfcegui4-1.0], [4.6.0])
++XDT_CHECK_PACKAGE([LIBXFCE4UI], [libxfce4ui-1], [4.7.0])
+ XDT_CHECK_PACKAGE([LIBXFCE4PANEL], [libxfce4panel-1.0], [4.6.0])
+ XDT_CHECK_PACKAGE([XFCONF], [libxfconf-0], [4.6.0])
+
+diff --git a/libxfce4mixer/Makefile.am b/libxfce4mixer/Makefile.am
+index b01d3f5..399bb2d 100644
+--- a/libxfce4mixer/Makefile.am
++++ b/libxfce4mixer/Makefile.am
+@@ -28,7 +28,7 @@ libxfce4mixer_la_CFLAGS = \
+ $(GLIB_CFLAGS) \
+ $(GTK_FLAGS) \
+ $(LIBXFCE4UTIL_CFLAGS) \
+- $(LIBXFCEGUI4_CFLAGS) \
++ $(LIBXFCE4UI_CFLAGS) \
+ $(XFCONF_CFLAGS) \
+ $(GST_PLUGINS_BASE_CFLAGS)
+
+@@ -40,7 +40,7 @@ libxfce4mixer_la_LIBADD = \
+ $(GLIB_LIBS) \
+ $(GTK_FLAGS) \
+ $(LIBXFCE4UTIL_LIBS) \
+- $(LIBXFCEGUI4_LIBS) \
++ $(LIBXFCE4UI_LIBS) \
+ $(XFCONF_LIBS) \
+ $(GST_PLUGINS_BASE_LIBS) \
+ -lgstaudio-0.10 \
+diff --git a/libxfce4mixer/xfce-mixer-card-combo.c b/libxfce4mixer/xfce-mixer-card-combo.c
+index 981fcae..db94866 100644
+--- a/libxfce4mixer/xfce-mixer-card-combo.c
++++ b/libxfce4mixer/xfce-mixer-card-combo.c
+@@ -142,6 +142,7 @@ xfce_mixer_card_combo_init (XfceMixerCardCombo *combo)
+ gtk_combo_box_set_model (GTK_COMBO_BOX (combo), GTK_TREE_MODEL (combo->list_store));
+
+ renderer = gtk_cell_renderer_text_new ();
++ g_object_set (G_OBJECT (renderer), "ellipsize", PANGO_ELLIPSIZE_END, NULL);
+ gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
+ gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (combo), renderer, "text", NAME_COLUMN);
+
+diff --git a/panel-plugin/Makefile.am b/panel-plugin/Makefile.am
+index dcf97d6..358ea44 100644
+--- a/panel-plugin/Makefile.am
++++ b/panel-plugin/Makefile.am
+@@ -24,7 +24,7 @@ xfce4_mixer_plugin_CFLAGS = \
+ $(GLIB_CFLAGS) \
+ $(GTK_CFLAGS) \
+ $(LIBXFCE4UTIL_CFLAGS) \
+- $(LIBXFCEGUI4_CFLAGS) \
++ $(LIBXFCE4UI_CFLAGS) \
+ $(LIBXFCE4PANEL_CFLAGS) \
+ $(GST_PLUGINS_BASE_CFLAGS)
+
+@@ -37,7 +37,7 @@ xfce4_mixer_plugin_LDFLAGS = \
+ $(GLIB_LIBS) \
+ $(GTK_LIBS) \
+ $(LIBXFCE4UTIL_LIBS) \
+- $(LIBXFCEGUI4_LIBS) \
++ $(LIBXFCE4UI_LIBS) \
+ $(LIBXFCE4PANEL_LIBS) \
+ $(GST_PLUGINS_BASE_LIBS) \
+ -lgstaudio-0.10 \
+diff --git a/panel-plugin/xfce-mixer-plugin.c b/panel-plugin/xfce-mixer-plugin.c
+index 88eeaad..af26ba2 100644
+--- a/panel-plugin/xfce-mixer-plugin.c
++++ b/panel-plugin/xfce-mixer-plugin.c
+@@ -31,9 +31,8 @@
+ #include <gst/gst.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
+-#include <libxfce4panel/xfce-panel-plugin.h>
+-#include <libxfce4panel/xfce-hvbox.h>
++#include <libxfce4ui/libxfce4ui.h>
++#include <libxfce4panel/libxfce4panel.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+@@ -344,7 +343,7 @@ xfce_mixer_plugin_clicked (XfceMixerPlugin *mixer_plugin)
+ GTK_STOCK_DIALOG_ERROR,
+ NULL,
+ _("No left-click command defined yet. You can change this in the plugin properties."),
+- XFCE_CUSTOM_STOCK_BUTTON, _("Properties"), GTK_STOCK_PREFERENCES, GTK_RESPONSE_ACCEPT,
++ XFCE_BUTTON_TYPE_MIXED, _("Properties"), GTK_STOCK_PREFERENCES, GTK_RESPONSE_ACCEPT,
+ GTK_STOCK_CLOSE, GTK_RESPONSE_REJECT,
+ NULL);
+
+@@ -367,7 +366,9 @@ xfce_mixer_plugin_clicked (XfceMixerPlugin *mixer_plugin)
+ mixer_plugin->command);
+
+ /* Display error */
+- xfce_err (message);
++ xfce_dialog_show_error (NULL,
++ NULL,
++ message);
+
+ /* Free error message */
+ g_free (message);
+@@ -392,9 +393,12 @@ xfce_mixer_plugin_configure (XfceMixerPlugin *mixer_plugin)
+ /* Warn user if no sound cards are available */
+ if (G_UNLIKELY (g_list_length (xfce_mixer_get_cards ()) <= 0))
+ {
+- xfce_err (_("GStreamer was unable to detect any sound devices. "
+- "Some sound system specific GStreamer packages may "
+- "be missing. It may also be a permissions problem."));
++ xfce_dialog_show_error (NULL,
++ NULL,
++ _("GStreamer was unable to detect any sound devices. "
++ "Some sound system specific GStreamer packages may "
++ "be missing. It may also be a permissions problem."));
++
+ }
+ else
+ {
+diff --git a/panel-plugin/xfce-plugin-dialog.c b/panel-plugin/xfce-plugin-dialog.c
+index 3c7edbf..cf099aa 100644
+--- a/panel-plugin/xfce-plugin-dialog.c
++++ b/panel-plugin/xfce-plugin-dialog.c
+@@ -27,7 +27,7 @@
+ #include <gst/gst.h>
+ #include <gst/interfaces/mixer.h>
+
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+diff --git a/panel-plugin/xfce-volume-button.c b/panel-plugin/xfce-volume-button.c
+index 82a7129..67dc781 100644
+--- a/panel-plugin/xfce-volume-button.c
++++ b/panel-plugin/xfce-volume-button.c
+@@ -27,7 +27,9 @@
+
+ #include <gdk/gdkkeysyms.h>
+
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
++
++#include <libxfce4panel/libxfce4panel.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+@@ -205,7 +207,7 @@ xfce_volume_button_init (XfceVolumeButton *button)
+ button->adjustment = gtk_adjustment_new (0.0, 0.0, 1.0, 0.05, 0.05, 0.0);
+
+ /* Create a new scaled image for the button icon */
+- button->image = xfce_scaled_image_new ();
++ button->image = xfce_panel_image_new ();
+ gtk_container_add (GTK_CONTAINER (button), button->image);
+ gtk_widget_show (button->image);
+
+@@ -430,7 +432,7 @@ xfce_volume_button_update (XfceVolumeButton *button)
+
+ /* Update the button icon */
+ if (G_LIKELY (pixbuf != NULL))
+- xfce_scaled_image_set_from_pixbuf (XFCE_SCALED_IMAGE (button->image), pixbuf);
++ xfce_panel_image_set_from_pixbuf (XFCE_PANEL_IMAGE (button->image), pixbuf);
+ }
+
+
+@@ -491,7 +493,11 @@ xfce_volume_button_set_icon_size (XfceVolumeButton *button,
+ if (GDK_IS_PIXBUF (button->pixbufs[i]))
+ g_object_unref (G_OBJECT (button->pixbufs[i]));
+
+- button->pixbufs[i] = xfce_themed_icon_load (icons[i], button->icon_size);
++ button->pixbufs[i] = gtk_icon_theme_load_icon (gtk_icon_theme_get_default(),
++ icons[i],
++ button->icon_size,
++ GTK_ICON_LOOKUP_USE_BUILTIN,
++ NULL);
+ }
+ }
+
+diff --git a/panel-plugin/xfce4-mixer-plugin.desktop.in.in b/panel-plugin/xfce4-mixer-plugin.desktop.in.in
+index 364c3af..e228c05 100644
+--- a/panel-plugin/xfce4-mixer-plugin.desktop.in.in
++++ b/panel-plugin/xfce4-mixer-plugin.desktop.in.in
+@@ -1,6 +1,5 @@
+ [Xfce Panel]
+ Type=X-XFCE-PanelPlugin
+-Encoding=UTF-8
+ _Name=Mixer
+ _Comment=Volume control for your sound card
+ Icon=multimedia-volume-control
+diff --git a/xfce4-mixer/Makefile.am b/xfce4-mixer/Makefile.am
+index 037cc97..a869325 100644
+--- a/xfce4-mixer/Makefile.am
++++ b/xfce4-mixer/Makefile.am
+@@ -28,7 +28,7 @@ xfce4_mixer_CFLAGS = \
+ $(GLIB_CFLAGS) \
+ $(GTK_CFLAGS) \
+ $(LIBXFCE4UTIL_CFLAGS) \
+- $(LIBXFCEGUI4_CFLAGS) \
++ $(LIBXFCE4UI_CFLAGS) \
+ $(XFCONF_CFLAGS) \
+ $(GST_PLUGINS_BASE_CFLAGS)
+
+@@ -41,7 +41,7 @@ xfce4_mixer_LDFLAGS = \
+ $(GTHREAD_LIBS) \
+ $(GTK_LIBS) \
+ $(LIBXFCE4UTIL_LIBS) \
+- $(LIBXFCEGUI4_LIBS) \
++ $(LIBXFCE4UI_LIBS) \
+ $(XFCONF_LIBS) \
+ $(GST_PLUGINS_BASE_LIBS) \
+ -lgstaudio-0.10 \
+diff --git a/xfce4-mixer/main.c b/xfce4-mixer/main.c
+index bad19a3..e459f8f 100644
+--- a/xfce4-mixer/main.c
++++ b/xfce4-mixer/main.c
+@@ -29,7 +29,7 @@
+ #include <gst/gst.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+ #include <xfconf/xfconf.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+@@ -87,9 +87,11 @@ main (int argc,
+ /* Warn users if there were no sound cards detected by GStreamer */
+ if (G_UNLIKELY (g_list_length (xfce_mixer_get_cards ()) <= 0))
+ {
+- xfce_err (_("GStreamer was unable to detect any sound devices. "
+- "Some sound system specific GStreamer packages may "
+- "be missing. It may also be a permissions problem."));
++ xfce_dialog_show_error (NULL,
++ NULL,
++ _("GStreamer was unable to detect any sound devices. "
++ "Some sound system specific GStreamer packages may "
++ "be missing. It may also be a permissions problem."));
+
+ return EXIT_FAILURE;
+ }
+diff --git a/xfce4-mixer/xfce-mixer-controls-dialog.c b/xfce4-mixer/xfce-mixer-controls-dialog.c
+index ad5eba1..c1ba813 100644
+--- a/xfce4-mixer/xfce-mixer-controls-dialog.c
++++ b/xfce4-mixer/xfce-mixer-controls-dialog.c
+@@ -26,7 +26,7 @@
+ #include <gst/interfaces/mixer.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+diff --git a/xfce4-mixer/xfce-mixer-option.c b/xfce4-mixer/xfce-mixer-option.c
+index 5d0254f..709e1e4 100644
+--- a/xfce4-mixer/xfce-mixer-option.c
++++ b/xfce4-mixer/xfce-mixer-option.c
+@@ -26,7 +26,7 @@
+ #include <gst/interfaces/mixer.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+diff --git a/xfce4-mixer/xfce-mixer-switch.c b/xfce4-mixer/xfce-mixer-switch.c
+index 880682a..c759b7f 100644
+--- a/xfce4-mixer/xfce-mixer-switch.c
++++ b/xfce4-mixer/xfce-mixer-switch.c
+@@ -26,7 +26,7 @@
+ #include <gst/interfaces/mixer.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+diff --git a/xfce4-mixer/xfce-mixer-track.c b/xfce4-mixer/xfce-mixer-track.c
+index c1b5b3f..f015349 100644
+--- a/xfce4-mixer/xfce-mixer-track.c
++++ b/xfce4-mixer/xfce-mixer-track.c
+@@ -26,7 +26,7 @@
+ #include <gst/interfaces/mixer.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+diff --git a/xfce4-mixer/xfce-mixer-window.c b/xfce4-mixer/xfce-mixer-window.c
+index d08505d..05aa532 100644
+--- a/xfce4-mixer/xfce-mixer-window.c
++++ b/xfce4-mixer/xfce-mixer-window.c
+@@ -27,7 +27,7 @@
+ #include <gst/interfaces/mixer.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+@@ -57,12 +57,12 @@ static void xfce_mixer_window_update_contents (XfceMixerWindow *
+
+ struct _XfceMixerWindowClass
+ {
+- GtkWindowClass __parent__;
++ XfceTitledDialogClass __parent__;
+ };
+
+ struct _XfceMixerWindow
+ {
+- GtkWindow __parent__;
++ XfceTitledDialog __parent__;
+
+ XfceMixerPreferences *preferences;
+
+@@ -118,7 +118,8 @@ xfce_mixer_window_get_type (void)
+ NULL,
+ };
+
+- type = g_type_register_static (GTK_TYPE_WINDOW, "XfceMixerWindow", &info, 0);
++ type = g_type_register_static (XFCE_TYPE_TITLED_DIALOG, "XfceMixerWindow", &info, 0);
++
+ }
+
+ return type;
+@@ -146,8 +147,6 @@ xfce_mixer_window_init (XfceMixerWindow *window)
+ {
+ GtkAccelGroup *accel_group;
+ GtkAction *action;
+- GtkWidget *heading;
+- GtkWidget *separator;
+ GtkWidget *label;
+ GtkWidget *button;
+ GtkWidget *vbox;
+@@ -168,6 +167,9 @@ xfce_mixer_window_init (XfceMixerWindow *window)
+ gtk_window_set_title (GTK_WINDOW (window), _("Mixer"));
+ gtk_window_set_default_size (GTK_WINDOW (window), width, height);
+ gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);
++ gtk_dialog_set_has_separator (GTK_DIALOG (window), FALSE);
++ xfce_titled_dialog_set_subtitle (XFCE_TITLED_DIALOG (window), _("Configure sound card(s) and control the volume of selected tracks"));
++
+ g_signal_connect (window, "delete-event", G_CALLBACK (xfce_mixer_window_closed), window);
+
+ /* Quit mixer when the main window is closed */
+@@ -189,21 +191,9 @@ xfce_mixer_window_init (XfceMixerWindow *window)
+ }
+ gtk_window_add_accel_group (GTK_WINDOW (window), accel_group);
+
+- vbox = gtk_vbox_new (FALSE, 0);
+- gtk_container_add (GTK_CONTAINER (window), vbox);
++ vbox = gtk_dialog_get_content_area (GTK_DIALOG (window));
+ gtk_widget_show (vbox);
+
+- heading = xfce_heading_new ();
+- xfce_heading_set_title (XFCE_HEADING (heading), _("Mixer"));
+- xfce_heading_set_subtitle (XFCE_HEADING (heading), _("Configure sound card(s) and control the volume of selected tracks"));
+- xfce_heading_set_icon_name (XFCE_HEADING (heading), "multimedia-volume-control");
+- gtk_box_pack_start (GTK_BOX (vbox), heading, FALSE, TRUE, 0);
+- gtk_widget_show (heading);
+-
+- separator = gtk_hseparator_new ();
+- gtk_box_pack_start (GTK_BOX (vbox), separator, FALSE, TRUE, 0);
+- gtk_widget_show (separator);
+-
+ hbox = gtk_hbox_new (FALSE, 12);
+ gtk_container_set_border_width (GTK_CONTAINER (hbox), 6);
+ gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, TRUE, 0);
+@@ -227,11 +217,9 @@ xfce_mixer_window_init (XfceMixerWindow *window)
+ gtk_container_add (GTK_CONTAINER (vbox), window->mixer_frame);
+ gtk_widget_show (window->mixer_frame);
+
+- bbox = gtk_hbutton_box_new ();
++ bbox = gtk_dialog_get_action_area (GTK_DIALOG (window));
+ gtk_button_box_set_layout (GTK_BUTTON_BOX (bbox), GTK_BUTTONBOX_EDGE);
+ gtk_container_set_border_width (GTK_CONTAINER (bbox), 6);
+- gtk_box_pack_start (GTK_BOX (vbox), bbox, FALSE, TRUE, 0);
+- gtk_widget_show (bbox);
+
+ window->select_controls_button = gtk_button_new ();
+ gtk_action_connect_proxy (gtk_action_group_get_action (window->action_group, "select-controls"),
+diff --git a/xfce4-mixer/xfce-mixer.c b/xfce4-mixer/xfce-mixer.c
+index c09a5b4..8d3ffcd 100644
+--- a/xfce4-mixer/xfce-mixer.c
++++ b/xfce4-mixer/xfce-mixer.c
+@@ -26,7 +26,7 @@
+ #include <gst/interfaces/mixer.h>
+
+ #include <libxfce4util/libxfce4util.h>
+-#include <libxfcegui4/libxfcegui4.h>
++#include <libxfce4ui/libxfce4ui.h>
+
+ #include "libxfce4mixer/libxfce4mixer.h"
+
+diff --git a/xfce4-mixer/xfce4-mixer.desktop.in.in b/xfce4-mixer/xfce4-mixer.desktop.in.in
+index 357926d..c962d84 100644
+--- a/xfce4-mixer/xfce4-mixer.desktop.in.in
++++ b/xfce4-mixer/xfce4-mixer.desktop.in.in
+@@ -1,6 +1,5 @@
+ [Desktop Entry]
+ Version=1.0
+-Encoding=UTF-8
+ _Name=Mixer
+ _Comment=Audio mixer for the Xfce Desktop Environment
+ Icon=multimedia-volume-control