moved from Mate-Extra

1 files changed, 695 insertions, 0 deletions

diff --git a/gstreamer-properties/gstreamer-properties.c b/gstreamer-properties/gstreamer-properties.c
new file mode 100644
index 0000000..4e9f0c9
--- /dev/null
+++ b/gstreamer-properties/gstreamer-properties.c
@@ -0,0 +1,695 @@
+/* -*- mode: c; style: linux -*- */
+/* -*- c-basic-offset: 2 -*- */
+
+/* gstreamer-properties.c
+ * Copyright (C) 2002 Jan Schmidt
+ * Copyright (C) 2005 Tim-Philipp Müller <tim centricular net>
+ *
+ * Written by: Jan Schmidt <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <locale.h>
+#include <string.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <mateconf/mateconf-client.h>
+#include <gst/gst.h>
+#include <gst/interfaces/propertyprobe.h>
+#include "gstreamer-properties-structs.h"
+#include "pipeline-tests.h"
+
+#define WID(s) gtk_builder_get_object (builder, s)
+static GtkBuilder *builder;
+static GtkDialog *main_window;
+static MateConfClient *mateconf_client; /* NULL */
+
+static gchar pipeline_editor_property[] = "gstp-editor";
+
+static gchar *
+gst_properties_mateconf_get_full_key (const gchar * key)
+{
+  return g_strdup_printf ("/system/gstreamer/%d.%d/%s",
+      GST_VERSION_MAJOR, GST_VERSION_MINOR, key);
+}
+
+gchar *
+gst_properties_mateconf_get_string (const gchar * key)
+{
+  GError *error = NULL;
+  gchar *value = NULL;
+  gchar *full_key;
+
+  full_key = gst_properties_mateconf_get_full_key (key);
+
+  value = mateconf_client_get_string (mateconf_client, full_key, &error);
+  g_free (full_key);
+
+  if (error) {
+    g_warning ("%s() error: %s", G_STRFUNC, error->message);
+    g_error_free (error);
+    return NULL;
+  }
+
+  return value;
+}
+
+void
+gst_properties_mateconf_set_string (const gchar * key, const gchar * value)
+{
+  GError *error = NULL;
+  gchar *full_key;
+
+  full_key = gst_properties_mateconf_get_full_key (key);
+
+  mateconf_client_set_string (mateconf_client, full_key, value, &error);
+  g_free (full_key);
+
+  if (error) {
+    g_warning ("%s() error: %s", G_STRFUNC, error->message);
+    g_error_free (error);
+  }
+}
+
+static void
+dialog_response (GtkDialog * widget, gint response_id, GtkBuilder * dialog)
+{
+  GError *error = NULL;
+
+  if (response_id == GTK_RESPONSE_HELP)
+    gtk_show_uri (gtk_widget_get_screen (GTK_WIDGET (dialog)),
+                  "ghelp:gstreamer-properties",
+                   gtk_get_current_event_time (),
+                  &error);
+  else
+    gtk_main_quit ();
+
+  if (error) {
+    g_warning ("%s() error: %s", G_STRFUNC, error->message);
+    g_error_free (error);
+  }
+}
+
+static void
+test_button_clicked (GtkButton * button, gpointer user_data)
+{
+  GSTPPipelineEditor *editor = (GSTPPipelineEditor *) (user_data);
+  GSTPPipelineDescription *pipeline_desc =
+      editor->pipeline_desc + editor->cur_pipeline_index;
+  if (pipeline_desc->is_custom) {
+    GtkEntry *entry = editor->entry;
+
+    pipeline_desc->pipeline = g_strdup (gtk_entry_get_text (GTK_ENTRY (entry)));
+  }
+
+  user_test_pipeline (builder, GTK_WINDOW (main_window), pipeline_desc);
+
+  if (pipeline_desc->is_custom) {
+    g_free (pipeline_desc->pipeline);
+    pipeline_desc->pipeline = NULL;
+  }
+}
+
+static void
+pipeline_devicemenu_changed (GtkComboBox *devicemenu, gpointer user_data)
+{
+  GSTPPipelineEditor *editor = (GSTPPipelineEditor *) (user_data);
+  GSTPPipelineDescription *pipeline_desc = NULL;
+  GtkTreeIter iter;
+  GtkTreeModel *model = gtk_combo_box_get_model (devicemenu);
+  gchar *devicename = NULL;
+  gboolean active;
+
+  /* Determine which option changed, retrieve the pipeline desc,
+   * and call update_from_option */
+
+  if (model == NULL)
+    return;
+
+  active = gtk_combo_box_get_active_iter (devicemenu, &iter);
+
+  if (!active)
+    return;
+
+  gtk_tree_model_get (model, &iter, 1, &pipeline_desc, 2, &devicename, -1);
+
+  if (pipeline_desc == NULL)
+    return;
+
+  pipeline_desc->device = devicename;
+
+  if (pipeline_desc->is_custom == FALSE) {
+    gchar *pipeline = gst_pipeline_string_from_desc (pipeline_desc);
+
+    if (pipeline)
+      gtk_entry_set_text (editor->entry, pipeline);
+    gtk_widget_set_sensitive (GTK_WIDGET (editor->entry), FALSE);
+
+    /* Update MateConf */
+    gst_properties_mateconf_set_string (editor->mateconf_key, pipeline);
+  } else {
+    gtk_widget_set_sensitive (GTK_WIDGET (editor->entry), TRUE);
+  }
+}
+
+static void
+update_device_menu (GSTPPipelineEditor * editor,
+    GSTPPipelineDescription * pipeline_desc)
+{
+  /* Lots of gstreamer stuff */
+  GstElementFactory *factory;
+  GstElement *element;
+  GstPropertyProbe *probe;
+  const GParamSpec *pspec;
+  GObjectClass *klass;
+  const gchar *longname;
+
+  if (editor->devicemenu == NULL) {
+    GtkCellRenderer *cellrenderer = gtk_cell_renderer_text_new ();
+
+    editor->devicemenu = GTK_COMBO_BOX (WID (editor->devicemenu_name));
+
+    gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (editor->devicemenu),
+                                cellrenderer, TRUE);
+    gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (editor->devicemenu),
+                                   cellrenderer, "text", 0);
+
+    g_object_set_data (G_OBJECT (editor->devicemenu), pipeline_editor_property,
+        (gpointer) (editor));
+    g_signal_connect (G_OBJECT (editor->devicemenu), "changed",
+        (GCallback) pipeline_devicemenu_changed, (gpointer) (editor));
+  }
+
+  if (editor->devicemenu) {
+    gchar *insensitive_label = g_strdup(_("None"));
+    gboolean devices_added = FALSE;
+    gboolean preselect = FALSE;
+    GtkTreeIter preselection;
+    /* Use a pointer for the devicename (col 3), the capplet seems to avoid
+     * string allocation/deallocation this way */
+    GtkListStore *store = gtk_list_store_new (3, G_TYPE_STRING,
+                                              G_TYPE_POINTER, G_TYPE_POINTER);
+
+    gtk_widget_set_sensitive (GTK_WIDGET (editor->devicemenu), FALSE);
+
+    gtk_combo_box_set_model (editor->devicemenu, NULL);
+
+    if (pipeline_desc->is_custom == FALSE) {
+
+      /* first see if we can actually create a device here */
+      factory = gst_element_factory_find (pipeline_desc->pipeline);
+      if (!factory) {
+        GST_WARNING ("Failed to find factory for pipeline '%s'",
+            pipeline_desc->pipeline);
+        // return;
+      }
+      else {
+        element = gst_element_factory_create (factory, "test");
+        longname = gst_element_factory_get_longname (factory);
+        if (!element) {
+          GST_WARNING ("Failed to create instance of factory '%s' (%s)",
+              longname, GST_PLUGIN_FEATURE (factory)->name);
+          //return;
+        }
+        else {
+          klass = G_OBJECT_GET_CLASS (element);
+
+          /* do we have a "device" property? */
+          if (!g_object_class_find_property (klass, "device") ||
+              !GST_IS_PROPERTY_PROBE (element) ||
+              !(probe = GST_PROPERTY_PROBE (element)) ||
+              !(pspec = gst_property_probe_get_property (probe, "device"))) {
+            GST_DEBUG ("Found source '%s' (%s) - no device",
+                longname, GST_PLUGIN_FEATURE (factory)->name);
+            g_free (insensitive_label);
+            /* Element does not support setting devices */
+            insensitive_label = g_strdup(_("Unsupported"));
+          } else {
+            gint n;
+            gchar *name;
+            GValueArray *array;
+
+            /* Set autoprobe[-fps] to FALSE to avoid delays when probing. */
+            if (g_object_class_find_property (klass, "autoprobe")) {
+              g_object_set (G_OBJECT (element), "autoprobe", FALSE, NULL);
+              if (g_object_class_find_property (klass, "autoprobe-fps")) {
+                g_object_set (G_OBJECT (element), "autoprobe-fps", FALSE, NULL);
+              }
+            }
+
+            array = gst_property_probe_probe_and_get_values (probe, pspec);
+            if (array != NULL) {
+              GtkTreeIter iter;
+
+              /* default device item, so we can let the element handle it */
+              if (array->n_values > 0) {
+                gtk_list_store_append (store, &iter);
+                gtk_list_store_set (store, &iter,
+                                    0, _("Default"),
+                                    1, (gpointer) pipeline_desc,
+                                    2, NULL, -1);
+
+                devices_added = TRUE;
+
+                // Preselect this to simulate GtkOptionMenu behavior
+                preselect = TRUE;
+                preselection = iter;
+
+                gtk_widget_set_sensitive (GTK_WIDGET (editor->devicemenu), TRUE);
+              }
+
+              for (n = 0; n < array->n_values; n++) {
+                GValue *device;
+                // GstCaps *caps;
+
+                device = g_value_array_get_nth (array, n);
+                g_object_set_property (G_OBJECT (element), "device", device);
+
+                if (gst_element_set_state (element, GST_STATE_READY) !=
+                    GST_STATE_CHANGE_SUCCESS) {
+                  GST_WARNING
+                      ("Found source '%s' (%s) - device %s failed to open", longname,
+                      GST_PLUGIN_FEATURE (factory)->name,
+                      g_value_get_string (device));
+                  continue;
+                }
+
+                g_object_get (G_OBJECT (element), "device-name", &name, NULL);
+                // caps = gst_pad_get_caps (gst_element_get_pad (element, "src"));
+
+                if (name == NULL)
+                  name = _("Unknown");
+
+                GST_DEBUG ("Found source '%s' (%s) - device %s '%s'",
+                    longname, GST_PLUGIN_FEATURE (factory)->name,
+                    g_value_get_string (device), name);
+
+                gst_element_set_state (element, GST_STATE_NULL);
+
+                /* Add device to devicemenu */
+                gtk_list_store_append (store, &iter);
+                gtk_list_store_set (store, &iter,
+                                    0, name,
+                                    1, (gpointer) pipeline_desc,
+                                    2, (gpointer) g_value_get_string (device),
+                                    -1);
+
+                devices_added = TRUE;
+                if (pipeline_desc->device != NULL &&
+                   !strcmp (pipeline_desc->device, g_value_get_string(device)))
+                {
+                  preselect = TRUE;
+                  preselection = iter;
+                }
+              }
+            }
+          }
+          gst_object_unref (GST_OBJECT (element));
+        }
+        gst_object_unref (GST_OBJECT (factory));
+      }
+    }
+
+    /* No devices to choose -> "None" */
+    if (!devices_added) {
+      GtkTreeIter iter;
+
+      gtk_list_store_append (store, &iter);
+      gtk_list_store_set (store, &iter,
+                          0, insensitive_label,
+                          1, (gpointer) pipeline_desc,
+                          2, NULL, -1);
+      preselect = TRUE;
+      preselection = iter;
+    }
+
+    gtk_combo_box_set_model (editor->devicemenu, GTK_TREE_MODEL (store));
+
+    if (preselect) {
+      gtk_combo_box_set_active_iter (editor->devicemenu, &preselection);
+    }
+
+    g_free (insensitive_label);
+  }
+}
+
+static void
+update_from_option (GSTPPipelineEditor * editor,
+    GSTPPipelineDescription * pipeline_desc)
+{
+  /* optionmenu changed, update the edit box, 
+   * and the appropriate MateConf key */
+  /* FIXME g_return_if_fail(editor); */
+  /* g_return_if_fail(pipeline_desc); */
+
+  editor->cur_pipeline_index = pipeline_desc->index;
+
+  /* Update device list */
+  update_device_menu(editor, pipeline_desc);
+
+  if (pipeline_desc->is_custom == FALSE) {
+    gchar *pipeline = gst_pipeline_string_from_desc(pipeline_desc);
+    if (pipeline)
+      gtk_entry_set_text (editor->entry, pipeline);
+    gtk_widget_set_sensitive (GTK_WIDGET (editor->entry), FALSE);
+
+    /* Update MateConf */
+    gst_properties_mateconf_set_string (editor->mateconf_key, pipeline);
+  } else {
+    gtk_widget_set_sensitive (GTK_WIDGET (editor->entry), TRUE);
+  }
+}
+
+static gboolean
+set_menuitem_by_pipeline (GtkTreeModel *model, GtkTreePath *path,
+                          GtkTreeIter *iter, gpointer data)
+{
+  GSTPPipelineEditor *editor = (GSTPPipelineEditor *) (data);
+  GSTPPipelineDescription *pipeline_desc;
+
+  gtk_tree_model_get (model, iter, 1, &pipeline_desc, -1);
+  if (pipeline_desc == (editor->pipeline_desc + editor->cur_pipeline_index)) {
+    gtk_combo_box_set_active_iter (editor->optionmenu, iter);
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+static void
+update_from_mateconf (GSTPPipelineEditor * editor, const gchar * pipeline_str)
+{
+  /* Iterate over the pipelines in the editor, and locate the one 
+     matching this pipeline_str. If none, then use 'Custom' entry */
+  int i = 0;
+  gint custom_desc = -1;
+
+  /* g_return_if_fail (editor != NULL); */
+  gchar **pipeline_nodes = g_strsplit (pipeline_str, " ", -1);
+  gchar *pipeline_device = NULL;
+  if (pipeline_nodes == NULL) {
+    pipeline_nodes[0] = (gchar*)pipeline_str;
+    pipeline_device = pipeline_nodes[1];
+  }
+
+  editor->cur_pipeline_index = -1;
+  for (i = 0; i < editor->n_pipeline_desc; i++) {
+    GSTPPipelineDescription *pipeline_desc = editor->pipeline_desc + i;
+
+    if (pipeline_desc->is_custom == TRUE) {
+      custom_desc = i;
+    } else if (!strcmp (gst_pipeline_string_from_desc (pipeline_desc), pipeline_str)) {
+      editor->cur_pipeline_index = i;
+      break;
+    } else if (!strcmp (gst_pipeline_string_from_desc (pipeline_desc), pipeline_nodes[0])) {
+      editor->cur_pipeline_index = i;
+      pipeline_desc->device = gst_pipeline_string_get_property_value(pipeline_str, "device");
+      break;
+    }
+  }
+
+  if (editor->cur_pipeline_index < 0) {
+    editor->cur_pipeline_index = custom_desc;
+    if (custom_desc >= 0) {
+      gtk_entry_set_text (editor->entry, pipeline_str);
+      if (pipeline_str == NULL || *pipeline_str == '\0')
+        gtk_widget_set_sensitive (GTK_WIDGET (editor->test_button), FALSE);
+    }
+  }
+
+  if (editor->cur_pipeline_index >= 0) {
+    GtkTreeModel *model = gtk_combo_box_get_model (editor->optionmenu);
+
+    gtk_tree_model_foreach (model, set_menuitem_by_pipeline, editor);
+    update_from_option (editor,
+        editor->pipeline_desc + editor->cur_pipeline_index);
+  }
+
+  g_strfreev(pipeline_nodes);
+}
+
+static void
+pipeline_option_changed (GtkComboBox *optionmenu, gpointer user_data)
+{
+  GtkTreeIter iter;
+  GtkTreeModel *model = gtk_combo_box_get_model (optionmenu);
+  gboolean active;
+  GSTPPipelineEditor *editor = (GSTPPipelineEditor *) (user_data);
+  GSTPPipelineDescription *pipeline_desc = NULL;
+
+  /* Determine which option changed, retrieve the pipeline desc,
+   * and call update_from_option */
+  active = gtk_combo_box_get_active_iter (optionmenu, &iter);
+  g_return_if_fail (active == TRUE);
+  gtk_tree_model_get (model, &iter, 1, &pipeline_desc, -1);
+
+  update_from_option (editor, pipeline_desc);
+}
+
+static void
+entry_changed (GtkEditable * editable, gpointer user_data)
+{
+  GSTPPipelineEditor *editor = (GSTPPipelineEditor *) (user_data);
+  const gchar *new_text = gtk_entry_get_text (GTK_ENTRY (editable));
+
+  if (new_text == NULL || *new_text == '\0') {
+    /* disable test button */
+    gtk_widget_set_sensitive (GTK_WIDGET (editor->test_button), FALSE);
+  } else {
+    gtk_widget_set_sensitive (GTK_WIDGET (editor->test_button), TRUE);
+  }
+  /* Update MateConf */
+  gst_properties_mateconf_set_string (editor->mateconf_key, new_text);
+}
+
+static gboolean
+element_available (const gchar * pipeline)
+{
+  gboolean res = FALSE;
+  gchar *p, *first_space;
+
+  if (pipeline == NULL || *pipeline == '\0')
+    return FALSE;
+
+  p = g_strdup (pipeline);
+
+  g_strstrip (p);
+
+  /* skip the check and pretend all is fine if it's something that does
+   * not look like an element name (e.g. parentheses to signify a bin) */
+  if (!g_ascii_isalpha (*p)) {
+    g_free (p);
+    return TRUE;
+  }
+
+  /* just the element name, no arguments */
+  first_space = strchr (p, ' ');
+  if (first_space != NULL)
+    *first_space = '\0';
+
+  /* check if element is available */
+  res = gst_default_registry_check_feature_version (p, GST_VERSION_MAJOR,
+      GST_VERSION_MINOR, 0);
+
+  g_free (p);
+  return res;
+}
+
+static GtkComboBox *
+create_pipeline_menu (GtkBuilder * dialog, GSTPPipelineEditor * editor)
+{
+  GtkComboBox *option = NULL;
+  gint i;
+  GSTPPipelineDescription *pipeline_desc = editor->pipeline_desc;
+
+
+  option = GTK_COMBO_BOX (WID (editor->optionmenu_name));
+  if (option) {
+    GtkListStore *list_store = gtk_list_store_new (2, G_TYPE_STRING,
+                                                   G_TYPE_POINTER);
+    GtkCellRenderer *cellrenderer = gtk_cell_renderer_text_new ();
+
+    gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (option), cellrenderer, TRUE);
+    gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (option), cellrenderer,
+                                   "text", 0);
+    for (i = 0; i < editor->n_pipeline_desc; i++) {
+      GtkTreeIter iter;
+
+      if (element_available (pipeline_desc[i].pipeline)) {
+        GstElement *pipeline;
+        GError *error = NULL;
+
+        pipeline = gst_parse_launch (pipeline_desc[i].pipeline, &error);
+        if (pipeline != NULL) {
+          gst_object_unref (pipeline);
+        }
+        if (error != NULL) {
+          g_error_free (error);
+          continue;
+        }
+      } else if (pipeline_desc[i].pipeline != NULL) {
+        /* FIXME: maybe we should show those in the
+         * combo box, but make them insensitive? Or is
+         * that more confusing than helpful for users? */
+        g_message ("Skipping unavailable plugin '%s'",
+            pipeline_desc[i].pipeline);
+        continue;
+      } else {
+        /* This is probably the 'Custom' pipeline */
+      }
+
+      gtk_list_store_append (list_store, &iter);
+      gtk_list_store_set (list_store, &iter,
+                          0, gettext (pipeline_desc[i].name),
+                          1, (gpointer) & pipeline_desc[i], -1);
+      pipeline_desc[i].index = i;
+    }
+
+    gtk_combo_box_set_model (option, GTK_TREE_MODEL (list_store));
+  }
+
+  return option;
+}
+
+static void
+init_pipeline_editor (GtkBuilder * dialog, GSTPPipelineEditor * editor)
+{
+  gchar *mateconf_init_pipe = NULL;
+
+  /* g_return_if_fail(editor != NULL); */
+
+  editor->optionmenu = create_pipeline_menu (dialog, editor);
+  editor->entry = GTK_ENTRY (WID (editor->entry_name));
+  editor->test_button = GTK_BUTTON (WID (editor->test_button_name));
+
+  /* g_return_if_fail (editor->entry && editor->optionmenu && editor->test_button); */
+  if (!(editor->entry && editor->optionmenu && editor->test_button))
+    return;
+
+  g_object_set_data (G_OBJECT (editor->optionmenu), pipeline_editor_property,
+      (gpointer) (editor));
+  g_signal_connect (G_OBJECT (editor->optionmenu), "changed",
+      (GCallback) pipeline_option_changed, (gpointer) (editor));
+  g_object_set_data (G_OBJECT (editor->entry), pipeline_editor_property,
+      (gpointer) (editor));
+  g_signal_connect (G_OBJECT (editor->entry), "changed",
+      (GCallback) entry_changed, (gpointer) (editor));
+  g_object_set_data (G_OBJECT (editor->test_button), pipeline_editor_property,
+      (gpointer) (editor));
+  g_signal_connect (G_OBJECT (editor->test_button), "clicked",
+      (GCallback) test_button_clicked, (gpointer) (editor));
+
+  mateconf_init_pipe = gst_properties_mateconf_get_string (editor->mateconf_key);
+
+  if (mateconf_init_pipe) {
+    update_from_mateconf (editor, mateconf_init_pipe);
+    g_free (mateconf_init_pipe);
+  }
+}
+
+static void
+create_dialog (void)
+{
+  int i = 0;
+
+  for (i = 0; i < pipeline_editors_count; i++) {
+    init_pipeline_editor (builder, pipeline_editors + i);
+  }
+
+  main_window = GTK_DIALOG (WID ("gst_properties_dialog"));
+  if (!main_window) {
+    /* Fatal error */
+    GtkWidget *dialog;
+    dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_DESTROY_WITH_PARENT,
+                                     GTK_MESSAGE_ERROR, GTK_BUTTONS_OK,
+                                     _("Failure instantiating main window"));
+    gtk_dialog_run (GTK_DIALOG (dialog));
+    gtk_widget_destroy (dialog);
+    return;
+  }
+
+  g_signal_connect (G_OBJECT (main_window),
+      "response", (GCallback) dialog_response, builder);
+  gtk_window_set_icon_name (GTK_WINDOW (main_window), "gstreamer-properties");
+  gtk_widget_show (GTK_WIDGET (main_window));
+}
+
+int
+main (int argc, char **argv)
+{
+  GOptionContext *ctx;
+  GError *error = NULL;
+
+  g_thread_init (NULL);
+
+  bindtextdomain (GETTEXT_PACKAGE, MATELOCALEDIR);
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+  textdomain (GETTEXT_PACKAGE);
+
+  ctx = g_option_context_new ("gstreamer-properties");
+  g_option_context_add_group (ctx, gtk_get_option_group (TRUE));
+  g_option_context_add_group (ctx, gst_init_get_option_group ());
+
+  if (! g_option_context_parse (ctx, &argc, &argv, &error)) {
+     g_printerr ("option parsing failed: %s\n", error->message);
+     g_error_free (error);
+     return EXIT_FAILURE;
+  }
+
+  builder = gtk_builder_new ();
+
+  /* FIXME: hardcode uninstalled path here */
+  if (g_file_test ("gstreamer-properties.ui", G_FILE_TEST_EXISTS) == TRUE) {
+    gtk_builder_add_from_file (builder, "gstreamer-properties.ui", &error);
+  } else if (g_file_test (GSTPROPS_UIDIR "/gstreamer-properties.ui",
+          G_FILE_TEST_EXISTS) == TRUE) {
+    gtk_builder_add_from_file (builder, GSTPROPS_UIDIR "/gstreamer-properties.ui", &error);
+  }
+
+  mateconf_client = mateconf_client_get_default ();
+
+  if (error) {
+    GtkWidget *dialog;
+
+    dialog = gtk_message_dialog_new (NULL,
+        0,
+        GTK_MESSAGE_ERROR,
+        GTK_BUTTONS_CLOSE,
+        _("Failed to load UI file; please check your installation."));
+
+    gtk_dialog_run (GTK_DIALOG (dialog));
+    gtk_widget_destroy (dialog);
+    g_clear_error (&error);
+
+    exit (1);
+  }
+
+  create_dialog ();
+
+  if (main_window)
+    gtk_main ();
+
+  g_object_unref (mateconf_client);
+
+  return 0;
+}