diff -up gdm-2.24.0/gui/simple-greeter/gdm-greeter-panel.c.add-panel-slide gdm-2.24.0/gui/simple-greeter/gdm-greeter-panel.c

--- gdm-2.24.0/gui/simple-greeter/gdm-greeter-panel.c.add-panel-slide	2008-08-21 00:31:47.000000000 -0400

+++ gdm-2.24.0/gui/simple-greeter/gdm-greeter-panel.c	2008-09-30 23:02:34.000000000 -0400

@@ -20,6 +20,7 @@

 #include "config.h"

+#include <math.h>

 #include <stdlib.h>

 #include <stdio.h>

 #include <sys/time.h>

@@ -40,6 +41,7 @@

 #include "gdm-language-option-widget.h"

 #include "gdm-layout-option-widget.h"

 #include "gdm-session-option-widget.h"

+#include "gdm-timer.h"

 #include "gdm-profile.h"

 #include "na-tray.h"

@@ -59,6 +61,9 @@ struct GdmGreeterPanelPrivate

         GtkWidget              *layout_option_widget;

         GtkWidget              *session_option_widget;

+        GdmTimer               *animation_timer;

+        double                  progress;

+

         char                   *default_session_name;

         char                   *default_language_name;

 };

@@ -349,7 +354,7 @@ update_geometry (GdmGreeterPanel *panel,

         panel->priv->geometry.height = requisition->height + 2 * GTK_CONTAINER (panel)->border_width;

         panel->priv->geometry.x = geometry.x;

-        panel->priv->geometry.y = geometry.y + geometry.height - panel->priv->geometry.height;

+        panel->priv->geometry.y = geometry.y + geometry.height - panel->priv->geometry.height + (1.0 - panel->priv->progress) * panel->priv->geometry.height;

 #if 0

         g_debug ("Setting geometry x:%d y:%d w:%d h:%d",

@@ -402,6 +407,39 @@ gdm_greeter_panel_real_size_request (Gtk

         gdm_greeter_panel_move_resize_window (panel, position_changed, size_changed);

 }

+static void

+gdm_greeter_panel_real_show (GtkWidget *widget)

+{

+        GdmGreeterPanel *panel;

+        GtkSettings *settings;

+        gboolean     animations_are_enabled;

+

+        settings = gtk_settings_get_for_screen (gtk_widget_get_screen (widget));

+        g_object_get (settings, "gtk-enable-animations", &animations_are_enabled, NULL);

+

+        panel = GDM_GREETER_PANEL (widget);

+

+        if (animations_are_enabled) {

+                gdm_timer_start (panel->priv->animation_timer, 1.0);

+        } else {

+                panel->priv->progress = 1.0;

+        }

+

+        GTK_WIDGET_CLASS (gdm_greeter_panel_parent_class)->show (widget);

+}

+

+static void

+gdm_greeter_panel_real_hide (GtkWidget *widget)

+{

+        GdmGreeterPanel *panel;

+

+        panel = GDM_GREETER_PANEL (widget);

+

+        gdm_timer_stop (panel->priv->animation_timer);

+        panel->priv->progress = 0.0;

+

+        GTK_WIDGET_CLASS (gdm_greeter_panel_parent_class)->hide (widget);

+}

 static void

 gdm_greeter_panel_class_init (GdmGreeterPanelClass *klass)

@@ -418,6 +456,9 @@ gdm_greeter_panel_class_init (GdmGreeter

         widget_class->realize = gdm_greeter_panel_real_realize;

         widget_class->unrealize = gdm_greeter_panel_real_unrealize;

         widget_class->size_request = gdm_greeter_panel_real_size_request;

+        widget_class->show = gdm_greeter_panel_real_show;

+        widget_class->hide = gdm_greeter_panel_real_hide;

+

         signals[LANGUAGE_SELECTED] =

                 g_signal_new ("language-selected",

                               G_TYPE_FROM_CLASS (object_class),

@@ -521,6 +562,15 @@ on_session_activated (GdmSessionOptionWi

 }

 static void

+on_animation_tick (GdmGreeterPanel *panel,

+                   double           progress)

+{

+        panel->priv->progress = progress * log ((G_E - 1.0) * progress + 1.0);

+

+        gtk_widget_queue_resize (GTK_WIDGET (panel));

+}

+

+static void

 gdm_greeter_panel_init (GdmGreeterPanel *panel)

 {

         NaTray    *tray;

@@ -605,6 +655,13 @@ gdm_greeter_panel_init (GdmGreeterPanel 

         gdm_greeter_panel_hide_user_options (panel);

+        panel->priv->progress = 0.0;

+        panel->priv->animation_timer = gdm_timer_new ();

+        g_signal_connect_swapped (panel->priv->animation_timer,

+                                  "tick",

+                                  G_CALLBACK (on_animation_tick),

+                                  panel);

+

         gdm_profile_end (NULL);

 }

@@ -620,6 +677,8 @@ gdm_greeter_panel_finalize (GObject *obj

         g_return_if_fail (greeter_panel->priv != NULL);

+        g_signal_handlers_disconnect_by_func (object, on_animation_tick, greeter_panel);

+

         G_OBJECT_CLASS (gdm_greeter_panel_parent_class)->finalize (object);

 }