[nautilus/wip/antoniof/flow-box-preparation: 40/70] view-icon-item-ui: Make :model a regular property

[António Fernandes <antoniof src gnome org>]

commit ef6fefba4fdd0a713c2a80bf084a88c48718946f
Author: António Fernandes <antoniof gnome org>
Date:   Sat Aug 28 21:19:06 2021 +0100

    view-icon-item-ui: Make :model a regular property
    
    Instead of a contruct-only property.
    
    This prepares for the GTK 4 list widget future, where the same ui may
    be recycled to represent different model items.

 src/nautilus-view-icon-controller.c |  3 ++-
 src/nautilus-view-icon-item-ui.c    | 37 +++++++++++++++++++++++++++++++------
 src/nautilus-view-icon-item-ui.h    |  4 +++-
 3 files changed, 36 insertions(+), 8 deletions(-)
---
diff --git a/src/nautilus-view-icon-controller.c b/src/nautilus-view-icon-controller.c
index 2094d8a48..5d7ac8119 100644
--- a/src/nautilus-view-icon-controller.c
+++ b/src/nautilus-view-icon-controller.c
@@ -1034,7 +1034,8 @@ create_widget_func (gpointer item,
     NautilusViewItemModel *item_model = NAUTILUS_VIEW_ITEM_MODEL (item);
     NautilusViewIconItemUi *child;
 
-    child = nautilus_view_icon_item_ui_new (item_model);
+    child = nautilus_view_icon_item_ui_new ();
+    nautilus_view_icon_item_ui_set_model (child, item_model);
     nautilus_view_item_model_set_item_ui (item_model, GTK_WIDGET (child));
     gtk_widget_show_all (GTK_WIDGET (child));
 
diff --git a/src/nautilus-view-icon-item-ui.c b/src/nautilus-view-icon-item-ui.c
index 157c3e680..e0de374c6 100644
--- a/src/nautilus-view-icon-item-ui.c
+++ b/src/nautilus-view-icon-item-ui.c
@@ -82,12 +82,16 @@ on_view_item_size_changed (GObject    *object,
     update_icon (self);
 }
 
+static void
+set_model (NautilusViewIconItemUi *self,
+           NautilusViewItemModel  *model);
+
 static void
 finalize (GObject *object)
 {
     NautilusViewIconItemUi *self = (NautilusViewIconItemUi *) object;
 
-    g_signal_handlers_disconnect_by_data (self->model, self);
+    set_model (self, NULL);
     G_OBJECT_CLASS (nautilus_view_icon_item_ui_parent_class)->finalize (object);
 }
 
@@ -118,6 +122,22 @@ set_model (NautilusViewIconItemUi *self,
 {
     NautilusFile *file;
 
+    if (self->model == model)
+    {
+        return;
+    }
+
+    if (self->model != NULL)
+    {
+        g_signal_handlers_disconnect_by_data (self->model, self);
+        g_clear_object (&self->model);
+    }
+
+    if (model == NULL)
+    {
+        return;
+    }
+
     self->model = g_object_ref (model);
 
     file = nautilus_view_item_model_get_file (self->model);
@@ -169,7 +189,7 @@ nautilus_view_icon_item_ui_class_init (NautilusViewIconItemUiClass *klass)
                                                           "Item model",
                                                           "The item model that this UI reprensents",
                                                           NAUTILUS_TYPE_VIEW_ITEM_MODEL,
-                                                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
+                                                          G_PARAM_READWRITE));
 
     gtk_widget_class_set_template_from_resource (widget_class, 
"/org/gnome/nautilus/ui/nautilus-view-icon-item-ui.ui");
 
@@ -198,9 +218,14 @@ nautilus_view_icon_item_ui_init (NautilusViewIconItemUi *self)
 }
 
 NautilusViewIconItemUi *
-nautilus_view_icon_item_ui_new (NautilusViewItemModel *model)
+nautilus_view_icon_item_ui_new (void)
+{
+    return g_object_new (NAUTILUS_TYPE_VIEW_ICON_ITEM_UI, NULL);
+}
+
+void
+nautilus_view_icon_item_ui_set_model (NautilusViewIconItemUi *self,
+                                      NautilusViewItemModel  *model)
 {
-    return g_object_new (NAUTILUS_TYPE_VIEW_ICON_ITEM_UI,
-                         "model", model,
-                         NULL);
+    g_object_set (self, "model", model, NULL);
 }
diff --git a/src/nautilus-view-icon-item-ui.h b/src/nautilus-view-icon-item-ui.h
index 577769a92..5eeea61e6 100644
--- a/src/nautilus-view-icon-item-ui.h
+++ b/src/nautilus-view-icon-item-ui.h
@@ -11,6 +11,8 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (NautilusViewIconItemUi, nautilus_view_icon_item_ui, NAUTILUS, VIEW_ICON_ITEM_UI, 
GtkFlowBoxChild)
 
-NautilusViewIconItemUi * nautilus_view_icon_item_ui_new (NautilusViewItemModel *item_model);
+NautilusViewIconItemUi * nautilus_view_icon_item_ui_new (void);
+void nautilus_view_icon_item_ui_set_model (NautilusViewIconItemUi *self,
+                                           NautilusViewItemModel  *model);
 
 G_END_DECLS