[libgd/wip/rishi/main-box: 6/6] Add GdMainBox



commit 74b1b8fb98c7818fc9225034b699989ddc67a088
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Nov 23 14:43:21 2016 +0100

    Add GdMainBox
    
    https://bugzilla.gnome.org/show_bug.cgi?id=774914

 libgd/gd-main-box.c |  898 +++++++++++++++++++++++++++++++++++++++++++++++++++
 libgd/gd-main-box.h |   63 ++++
 2 files changed, 961 insertions(+), 0 deletions(-)
---
diff --git a/libgd/gd-main-box.c b/libgd/gd-main-box.c
new file mode 100644
index 0000000..2aa2f54
--- /dev/null
+++ b/libgd/gd-main-box.c
@@ -0,0 +1,898 @@
+/*
+ * Copyright (c) 2016 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by 
+ * the Free Software Foundation; either version 2 of the License, 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 Lesser General Public 
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License 
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Author: Debarshi Ray <debarshir gnome org>
+ *
+ */
+
+#include "gd-main-box.h"
+#include "gd-main-box-child.h"
+#include "gd-main-box-item.h"
+
+#define MAIN_BOX_TYPE_INITIAL -1
+#define MAIN_BOX_DND_ICON_OFFSET 20
+#define MAIN_BOX_RUBBERBAND_SELECT_TRIGGER_LENGTH 32
+
+typedef struct _GdMainBoxPrivate GdMainBoxPrivate;
+
+struct _GdMainBoxPrivate
+{
+  GdMainBoxType current_type;
+  gboolean selection_mode;
+
+  GtkWidget *current_view;
+  GListModel *model;
+
+  gboolean track_motion;
+  gboolean rubberband_select;
+  GtkTreePath *rubberband_select_first_path;
+  GtkTreePath *rubberband_select_last_path;
+  int button_down_x;
+  int button_down_y;
+
+  gchar *button_press_item_path;
+
+  gchar *last_selected_id;
+};
+
+enum {
+  PROP_BOX_TYPE = 1,
+  PROP_SELECTION_MODE,
+  PROP_MODEL,
+  NUM_PROPERTIES
+};
+
+enum {
+  ITEM_ACTIVATED = 1,
+  SELECTION_MODE_REQUEST,
+  VIEW_SELECTION_CHANGED,
+  NUM_SIGNALS
+};
+
+static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
+static guint signals[NUM_SIGNALS] = { 0, };
+
+G_DEFINE_TYPE_WITH_PRIVATE (GdMainBox, gd_main_box, GTK_TYPE_SCROLLED_WINDOW)
+
+static void
+gd_main_box_dispose (GObject *obj)
+{
+  GdMainBox *self = GD_MAIN_BOX (obj);
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  g_clear_object (&priv->model);
+
+  G_OBJECT_CLASS (gd_main_box_parent_class)->dispose (obj);
+}
+
+static void
+gd_main_box_finalize (GObject *obj)
+{
+  GdMainBox *self = GD_MAIN_BOX (obj);
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  g_free (priv->button_press_item_path);
+  g_free (priv->last_selected_id);
+
+  if (priv->rubberband_select_first_path)
+    gtk_tree_path_free (priv->rubberband_select_first_path);
+
+  if (priv->rubberband_select_last_path)
+    gtk_tree_path_free (priv->rubberband_select_last_path);
+
+  G_OBJECT_CLASS (gd_main_box_parent_class)->finalize (obj);
+}
+
+static void
+gd_main_box_init (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+  GtkStyleContext *context;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  /* so that we get constructed with the right view even at startup */
+  priv->current_type = MAIN_BOX_TYPE_INITIAL;
+
+  gtk_widget_set_hexpand (GTK_WIDGET (self), TRUE);
+  gtk_widget_set_vexpand (GTK_WIDGET (self), TRUE);
+  gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (self), GTK_SHADOW_IN);
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (self), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
+
+  context = gtk_widget_get_style_context (GTK_WIDGET (self));
+  gtk_style_context_add_class (context, "documents-scrolledwin");
+}
+
+static void
+gd_main_box_get_property (GObject    *object,
+                          guint       property_id,
+                          GValue     *value,
+                          GParamSpec *pspec)
+{
+  GdMainBox *self = GD_MAIN_BOX (object);
+
+  switch (property_id)
+    {
+    case PROP_BOX_TYPE:
+      g_value_set_int (value, gd_main_box_get_box_type (self));
+      break;
+    case PROP_SELECTION_MODE:
+      g_value_set_boolean (value, gd_main_box_get_selection_mode (self));
+      break;
+    case PROP_MODEL:
+      g_value_set_object (value, gd_main_box_get_model (self));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gd_main_box_set_property (GObject    *object,
+                          guint       property_id,
+                          const GValue *value,
+                          GParamSpec *pspec)
+{
+  GdMainBox *self = GD_MAIN_BOX (object);
+
+  switch (property_id)
+    {
+    case PROP_BOX_TYPE:
+      gd_main_box_set_box_type (self, g_value_get_int (value));
+      break;
+    case PROP_SELECTION_MODE:
+      gd_main_box_set_selection_mode (self, g_value_get_boolean (value));
+      break;
+    case PROP_MODEL:
+      gd_main_box_set_model (self, g_value_get_object (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gd_main_box_class_init (GdMainBoxClass *klass)
+{
+  GObjectClass *oclass = G_OBJECT_CLASS (klass);
+
+  oclass->get_property = gd_main_box_get_property;
+  oclass->set_property = gd_main_box_set_property;
+  oclass->dispose = gd_main_box_dispose;
+  oclass->finalize = gd_main_box_finalize;
+
+  properties[PROP_BOX_TYPE] = g_param_spec_int ("box-type",
+                                                "Box type",
+                                                "Box type",
+                                                GD_MAIN_BOX_ICON,
+                                                GD_MAIN_BOX_LIST,
+                                                GD_MAIN_BOX_ICON,
+                                                G_PARAM_READWRITE |
+                                                G_PARAM_CONSTRUCT |
+                                                G_PARAM_STATIC_STRINGS);
+
+  properties[PROP_SELECTION_MODE] = g_param_spec_boolean ("selection-mode",
+                                                          "Selection mode",
+                                                          "Whether the view is in selection mode",
+                                                          FALSE,
+                                                          G_PARAM_READWRITE |
+                                                          G_PARAM_CONSTRUCT |
+                                                          G_PARAM_STATIC_STRINGS);
+
+  properties[PROP_MODEL] = g_param_spec_object ("model",
+                                                "Model",
+                                                "The GListModel",
+                                                G_TYPE_LIST_MODEL,
+                                                G_PARAM_READWRITE |
+                                                G_PARAM_CONSTRUCT |
+                                                G_PARAM_STATIC_STRINGS);
+
+  signals[ITEM_ACTIVATED] = g_signal_new ("item-activated",
+                                          GD_TYPE_MAIN_BOX,
+                                          G_SIGNAL_RUN_LAST,
+                                          0,
+                                          NULL,
+                                          NULL,
+                                          NULL,
+                                          G_TYPE_NONE,
+                                          1,
+                                          GD_TYPE_MAIN_BOX_ITEM);
+
+  signals[SELECTION_MODE_REQUEST] = g_signal_new ("selection-mode-request",
+                                                  GD_TYPE_MAIN_BOX,
+                                                  G_SIGNAL_RUN_LAST,
+                                                  0,
+                                                  NULL,
+                                                  NULL,
+                                                  NULL,
+                                                  G_TYPE_NONE,
+                                                  0);
+
+  signals[VIEW_SELECTION_CHANGED] = g_signal_new ("view-selection-changed",
+                                                  GD_TYPE_MAIN_BOX,
+                                                  G_SIGNAL_RUN_LAST,
+                                                  0,
+                                                  NULL,
+                                                  NULL,
+                                                  NULL,
+                                                  G_TYPE_NONE,
+                                                  0);
+
+  g_object_class_install_properties (oclass, NUM_PROPERTIES, properties);
+}
+
+static GdMainBoxGeneric *
+get_generic (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (priv->current_view != NULL)
+    return GD_MAIN_BOX_GENERIC (priv->current_view);
+
+  return NULL;
+}
+
+static void
+gd_main_box_mark_range_as_selected (GdMainBox *self, gint first_element, gint last_element)
+{
+  GdMainBoxPrivate *priv;
+  gint i;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (first_element > last_element)
+    {
+      gint tmp;
+
+      tmp = first_element;
+      first_element = last_element;
+      last_element = tmp;
+    }
+
+  for (i = first_element; i <= last_element; i++)
+    {
+      GdMainBoxChild *child;
+
+      child = gd_main_box_generic_get_child_at_index (GD_MAIN_BOX_GENERIC (priv->current_view), i);
+      gd_main_box_child_set_selected (child, TRUE);
+    }
+}
+
+static void
+gd_main_box_select_range (GdMainBox *self, GdMainBoxChild *child)
+{
+  GdMainBoxPrivate *priv;
+  gint index;
+  gint other_index = -1;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  index = gd_main_box_child_get_index (child);
+
+  if (priv->last_selected_id != NULL)
+    {
+      guint i;
+      guint n_items;
+
+      n_times = g_list_model_get_n_items (priv->model);
+      for (i = 0; i < n_items && other_index == -1; i++)
+        {
+          GdMainBoxItem *item;
+          const gchar *id;
+
+          item = GD_MAIN_BOX_ITEM (g_list_model_get_object (priv->model, i));
+          id = gd_main_box_item_get_id (item);
+         if (g_strcmp0 (id, priv->last_selected_id) == 0)
+            other_index = (gint) i;
+
+          g_object_unref (item);
+       }
+    }
+
+  if (other_index == -1)
+    {
+      gint i;
+
+      for (i = index - 1; i >= 0; i--)
+        {
+          GdMainBoxChild *other;
+
+          other = gd_main_box_generic_get_child_at_index (priv->current_view, i);
+          if (gd_main_box_child_get_selected (other))
+            {
+              other_index = i;
+              break;
+           }
+       }
+    }
+
+  if (other_index == -1)
+    {
+      gint i = index + 1;
+
+      while (i++)
+        {
+          GdMainBoxChild *other;
+
+          other = gd_main_box_generic_get_child_at_index (priv->current_view, i);
+          if (other == NULL)
+            break;
+
+          if (gd_main_box_child_get_selected (other))
+            {
+              other_index = i;
+              break;
+            }
+        }
+    }
+
+  if (other_index == -1)
+    gd_main_box_child_set_selected (child, TRUE);
+  else
+    gd_main_box_mark_range_as_selected (self, index, other_index);
+
+  g_signal_emit (self, signals[VIEW_SELECTION_CHANGED], 0);
+}
+
+static void
+gd_main_box_toggle_selection_for_child (GdMainBox *self, GdMainBoxChild *child, gboolean select_range)
+{
+  GdMainBoxPrivate *priv;
+  gboolean selected;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (priv->model == NULL)
+    return;
+
+  selected = gd_main_box_child_get_selected (child);
+
+  if (selected)
+    {
+      gd_main_box_child_set_selected (child, FALSE);
+    }
+  else
+    {
+      if (select_range)
+        {
+          gd_main_box_select_range (self, child);
+        }
+      else
+       {
+          GdMainBoxItem *item;
+          const gchar *id;
+
+          item = gd_main_box_child_get_item (child);
+          id = gd_main_box_item_get_id (item);
+
+          g_free (priv->last_selected_id);
+          priv->last_selected_id = g_strdup (id);
+
+          gd_main_box_child_set_selected (child, TRUE);
+       }
+    }
+
+  g_signal_emit (self, signals[VIEW_SELECTION_CHANGED], 0);
+}
+
+static void
+gd_main_box_activate_item_for_child (GdMainBox *self, GdMainBoxChild *child)
+{
+  GdMainBoxPrivate *priv;
+  GdMainBoxItem *item;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (priv->model == NULL)
+    return;
+
+  item = gd_main_box_child_get_item (child);
+  if (item == NULL)
+    return;
+
+  g_signal_emit (self, signals[ITEM_ACTIVATED], 0, item);
+}
+
+static gboolean
+on_button_release_selection_mode (GdMainBox *self,
+                                  GdkEventButton *event,
+                                  GtkTreePath *path)
+{
+  gd_main_box_toggle_selection_for_child (self, path, ((event->state & GDK_SHIFT_MASK) != 0));
+  return GDK_EVENT_PROPAGATE;
+}
+
+static gboolean
+on_button_release_view_mode (GdMainBox *self,
+                             GdkEventButton *event,
+                             GtkTreePath *path)
+{
+  gd_main_box_activate_item_for_child (self, child);
+  return GDK_EVENT_PROPAGATE;
+}
+
+static gboolean
+event_triggers_selection_mode (GdkEventButton *event)
+{
+  return
+    (event->button == 3) ||
+    ((event->button == 1) && (event->state & GDK_CONTROL_MASK));
+}
+
+static gboolean
+on_button_release_event (GtkWidget *view,
+                         GdkEventButton *event,
+                         gpointer user_data)
+{
+  GdMainBox *self = user_data;
+  GdMainBoxPrivate *priv;
+  GdMainBoxGeneric *generic = get_generic (self);
+  GtkTreePath *path, *start_path, *end_path, *tmp_path;
+  GtkTreeIter iter;
+  gchar *button_release_item_path;
+  gboolean selection_mode;
+  gboolean res, same_item = FALSE;
+  gboolean is_selected;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  /* eat double/triple click events */
+  if (event->type != GDK_BUTTON_RELEASE)
+    return TRUE;
+
+  path = gd_main_box_generic_get_path_at_pos (generic, event->x, event->y);
+
+  if (path != NULL)
+    {
+      button_release_item_path = gtk_tree_path_to_string (path);
+      if (g_strcmp0 (priv->button_press_item_path, button_release_item_path) == 0)
+        same_item = TRUE;
+
+      g_free (button_release_item_path);
+    }
+
+  g_free (priv->button_press_item_path);
+  priv->button_press_item_path = NULL;
+
+  priv->track_motion = FALSE;
+  if (priv->rubberband_select)
+    {
+      priv->rubberband_select = FALSE;
+      gd_main_box_generic_set_rubberband_range (get_generic (self), NULL, NULL);
+      if (priv->rubberband_select_last_path)
+       {
+         if (!priv->selection_mode)
+           g_signal_emit (self, signals[SELECTION_MODE_REQUEST], 0);
+         if (!priv->selection_mode)
+           {
+             res = FALSE;
+             goto out;
+           }
+
+         start_path = gtk_tree_path_copy (priv->rubberband_select_first_path);
+         end_path = gtk_tree_path_copy (priv->rubberband_select_last_path);
+         if (gtk_tree_path_compare (start_path, end_path) > 0)
+           {
+             tmp_path = start_path;
+             start_path = end_path;
+             end_path = tmp_path;
+           }
+
+         while (gtk_tree_path_compare (start_path, end_path) <= 0)
+           {
+             if (gtk_tree_model_get_iter (priv->model,
+                                          &iter, start_path))
+               {
+                 gtk_tree_model_get (priv->model, &iter,
+                                     GD_MAIN_COLUMN_SELECTED, &is_selected,
+                                     -1);
+                  gd_main_box_child_set_selected (child, !is_selected);
+               }
+
+             gtk_tree_path_next (start_path);
+           }
+
+          g_signal_emit (self, signals[VIEW_SELECTION_CHANGED], 0);
+
+         gtk_tree_path_free (start_path);
+         gtk_tree_path_free (end_path);
+       }
+
+      g_clear_pointer (&priv->rubberband_select_first_path,
+                      gtk_tree_path_free);
+      g_clear_pointer (&priv->rubberband_select_last_path,
+                      gtk_tree_path_free);
+
+      res = TRUE;
+      goto out;
+    }
+
+  if (!same_item)
+    {
+      res = FALSE;
+      goto out;
+    }
+
+  selection_mode = priv->selection_mode;
+
+  if (!selection_mode)
+    {
+      if (event_triggers_selection_mode (event))
+        {
+          g_signal_emit (self, signals[SELECTION_MODE_REQUEST], 0);
+          if (!priv->selection_mode)
+            {
+              res = FALSE;
+              goto out;
+            }
+          selection_mode = priv->selection_mode;
+        }
+    }
+
+  if (selection_mode)
+    res = on_button_release_selection_mode (self, event, path);
+  else
+    res = on_button_release_view_mode (self, event, path);
+
+ out:
+  gtk_tree_path_free (path);
+  return res;
+}
+
+static gboolean
+on_button_press_event (GtkWidget *view,
+                       GdkEventButton *event,
+                       gpointer user_data)
+{
+  GdMainBox *self = user_data;
+  GdMainBoxPrivate *priv;
+  GdMainBoxGeneric *generic = get_generic (self);
+  GtkTreePath *path;
+  GList *selection, *l;
+  GtkTreePath *sel_path;
+  gboolean found = FALSE;
+  gboolean force_selection;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  path = gd_main_box_generic_get_path_at_pos (generic, event->x, event->y);
+
+  if (path != NULL)
+    priv->button_press_item_path = gtk_tree_path_to_string (path);
+
+  force_selection = event_triggers_selection_mode (event);
+  if (!priv->selection_mode && !force_selection)
+    {
+      gtk_tree_path_free (path);
+      return FALSE;
+    }
+
+  if (path && !force_selection)
+    {
+      selection = gd_main_box_get_selection (self);
+
+      for (l = selection; l != NULL; l = l->next)
+       {
+         sel_path = l->data;
+         if (gtk_tree_path_compare (path, sel_path) == 0)
+           {
+             found = TRUE;
+             break;
+           }
+       }
+
+      if (selection != NULL)
+       g_list_free_full (selection, (GDestroyNotify) gtk_tree_path_free);
+    }
+
+  /* if we did not find the item in the selection, block
+   * drag and drop, while in selection mode
+   */
+  if (!found)
+    {
+      priv->track_motion = TRUE;
+      priv->rubberband_select = FALSE;
+      priv->rubberband_select_first_path = NULL;
+      priv->rubberband_select_last_path = NULL;
+      priv->button_down_x = event->x;
+      priv->button_down_y = event->y;
+      return TRUE;
+    }
+  else
+    return FALSE;
+}
+
+static void
+gd_main_box_activated (GdMainBox *self, GdMainBoxChild *child)
+{
+  GdMainBoxPrivate *priv;
+  GdkModifierType state;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  gtk_get_current_event_state (&state);
+
+  if (priv->selection_mode || (state & GDK_CONTROL_MASK) != 0)
+    {
+      if (!priv->selection_mode)
+       g_signal_emit (self, signals[SELECTION_MODE_REQUEST], 0);
+      gd_main_box_toggle_selection_for_child (self, child, ((state & GDK_SHIFT_MASK) != 0));
+    }
+  else
+    {
+      gd_main_box_activate_item_for_child (self, child);
+    }
+}
+
+static void
+gd_main_box_icon_child_activated_cb (GdMainBox *self, GtkFlowBoxChild *child)
+{
+  gd_main_box_activated (self, GD_MAIN_BOX_CHILD (child));
+}
+
+static void
+gd_main_box_model_items_changed_cb (GdMainBox *self, guint position, guint removed, guint added)
+{
+  GdMainBox *self = user_data;
+
+  if (removed == 0)
+    return;
+
+  g_signal_emit (self, signals[VIEW_SELECTION_CHANGED], 0);
+}
+
+static void
+gd_main_box_apply_selection_mode (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  gd_main_box_generic_set_selection_mode (GD_MAIN_BOX_GENERIC (priv->current_view), priv->selection_mode);
+
+  if (!priv->selection_mode)
+    {
+      g_clear_pointer (&priv->last_selected_id, g_free);
+      if (priv->model != NULL)
+        gd_main_box_unselect_all (self);
+    }
+}
+
+static void
+gd_main_box_rebuild (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+  GtkStyleContext *context;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (priv->current_view != NULL)
+    gtk_widget_destroy (priv->current_view);
+
+  switch (priv->current_type)
+    {
+    case GD_MAIN_BOX_ICON:
+      priv->current_view = gd_main_icon_box_new ();
+      g_signal_connect_swapped (priv->current_view,
+                                "child-activated",
+                                G_CALLBACK (gd_main_box_icon_child_activated_cb),
+                                self);
+      break;
+
+    case GD_MAIN_BOX_LIST:
+    default:
+      g_assert_not_reached ();
+      break;
+    }
+
+  context = gtk_widget_get_style_context (priv->current_view);
+  gtk_style_context_add_class (context, "content-view");
+
+  gtk_container_add (GTK_CONTAINER (self), priv->current_view);
+
+  g_signal_connect (priv->current_view, "button-press-event",
+                    G_CALLBACK (on_button_press_event), self);
+  g_signal_connect (priv->current_view, "button-release-event",
+                    G_CALLBACK (on_button_release_event), self);
+
+  gd_main_box_generic_set_model (GD_MAIN_BOX_GENERIC (priv->current_view), priv->model);
+  gd_main_box_apply_selection_mode (self);
+
+  gtk_widget_show_all (GTK_WIDGET (self));
+}
+
+GdMainBox *
+gd_main_box_new (GdMainBoxType type)
+{
+  return g_object_new (GD_TYPE_MAIN_BOX, "box-type", type, NULL);
+}
+
+GdMainBoxType
+gd_main_box_get_box_type (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+  return priv->current_type;
+}
+
+void
+gd_main_box_set_box_type (GdMainBox *self, GdMainBoxType type)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (type == priv->current_type)
+    return;
+
+  priv->current_type = type;
+  gd_main_box_rebuild (self);
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_BOX_TYPE]);
+}
+
+gboolean
+gd_main_box_get_selection_mode (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+  return priv->selection_mode;
+}
+
+void
+gd_main_box_set_selection_mode (GdMainBox *self, gboolean selection_mode)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (selection_mode == priv->selection_mode)
+    return;
+
+  priv->selection_mode = selection_mode;
+  gd_main_box_apply_selection_mode (self);
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SELECTION_MODE]);
+}
+
+/**
+ * gd_main_box_get_model:
+ * @self:
+ *
+ * Returns: (transfer none):
+ */
+GListModel *
+gd_main_box_get_model (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+  return priv->model;
+}
+
+/**
+ * gd_main_box_set_model:
+ * @self:
+ * @model: (allow-none):
+ *
+ */
+void
+gd_main_box_set_model (GdMainBox *self, GListModel *model)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  if (model == priv->model)
+    return;
+
+  if (priv->model)
+    g_signal_handlers_disconnect_by_func (priv->model, gd_main_box_model_items_changed_cb, self);
+
+  g_clear_object (&priv->model);
+
+  if (model != NULL)
+    {
+      priv->model = g_object_ref (model);
+      g_signal_connect_object (priv->model,
+                               "items-changed",
+                               G_CALLBACK (gd_main_box_model_items_changed_cb),
+                               self,
+                               G_CONNECT_SWAPPED);
+    }
+
+  gd_main_box_generic_set_model (GD_MAIN_BOX_GENERIC (priv->current_view), priv->model);
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MODEL]);
+}
+
+/**
+ * gd_main_box_get_generic_view:
+ * @self:
+ *
+ * Returns: (transfer none):
+ */
+GtkWidget *
+gd_main_box_get_generic_view (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+  return priv->current_view;
+}
+
+static void
+gd_main_box_build_selection_list_foreach (GtkWidget *widget, gpointer user_data)
+{
+  GList **selection = (GList **) user_data;
+
+  if (gd_main_box_child_get_selected (GD_MAIN_BOX_CHILD (widget)))
+    {
+      GdMainBoxItem *item;
+
+      item = gd_main_box_child_get_item (GD_MAIN_BOX_CHILD (widget));
+      *selection = g_list_prepend (*selection, g_object_ref (item));
+    }
+}
+
+/**
+ * gd_main_box_get_selection:
+ * @self:
+ *
+ * Returns: (element-type GdMainBoxItem) (transfer full):
+ */
+GList *
+gd_main_box_get_selection (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+  GList *selection = NULL;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  gtk_container_foreach (GTK_CONTAINER (priv->current_view), gd_main_box_build_selection_list_foreach, 
&selection);
+  selection = g_list_reverse (selection);
+  return selection;
+}
+
+void
+gd_main_box_select_all (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  gd_main_box_generic_select_all (GD_MAIN_BOX_GENERIC (priv->current_view));
+  g_signal_emit (self, signals[VIEW_SELECTION_CHANGED], 0);
+}
+
+void
+gd_main_box_unselect_all (GdMainBox *self)
+{
+  GdMainBoxPrivate *priv;
+
+  priv = gd_main_box_get_instance_private (self);
+
+  gd_main_box_generic_unselect_all (GD_MAIN_BOX_GENERIC (priv->current_view));
+  g_signal_emit (self, signals[VIEW_SELECTION_CHANGED], 0);
+}
diff --git a/libgd/gd-main-box.h b/libgd/gd-main-box.h
new file mode 100644
index 0000000..eb80491
--- /dev/null
+++ b/libgd/gd-main-box.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2016 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by 
+ * the Free Software Foundation; either version 2 of the License, 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 Lesser General Public 
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License 
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Author: Debarshi Ray <debarshir gnome org>
+ *
+ */
+
+#ifndef __GD_MAIN_BOX_H__
+#define __GD_MAIN_BOX_H__
+
+#include <gio/gio.h>
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define GD_TYPE_MAIN_BOX gd_main_box_get_type()
+G_DECLARE_DERIVABLE_TYPE (GdMainBox, gd_main_box, GD, MAIN_BOX, GtkScrolledWindow)
+
+typedef enum
+{
+  GD_MAIN_BOX_ICON,
+  GD_MAIN_BOX_LIST
+} GdMainBoxType;
+
+struct _GdMainBoxClass
+{
+  GtkScrolledWindowClass parent_class;
+};
+
+GtkWidget      * gd_main_box_new           (GdMainBoxType type);
+GdMainBoxType    gd_main_box_get_box_type  (GdMainBox *self);
+void             gd_main_box_set_box_type  (GdMainBox *self, GdMainBoxType type);
+
+gboolean  gd_main_box_get_selection_mode  (GdMainBox *self);
+void      gd_main_box_set_selection_mode  (GdMainBox *self, gboolean selection_mode);
+
+GList  * gd_main_box_get_selection  (GdMainBox *self);
+
+void  gd_main_box_select_all    (GdMainBox *self);
+void  gd_main_box_unselect_all  (GdMainBox *self);
+
+GListModel * gd_main_box_get_model (GdMainBox *self);
+void  gd_main_box_set_model (GdMainBox *self, GListModel *model);
+
+GtkWidget  * gd_main_box_get_generic_box  (GdMainBox *self);
+
+G_END_DECLS
+
+#endif /* __GD_MAIN_BOX_H__ */


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