[gnome-todo/wip/gbsneto/subtasks] task-list-view: delegate DnD to GtdDndRow

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 4a5fc0e841670c723084600fccb777be2443923d
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Oct 14 10:26:36 2016 -0300

    task-list-view: delegate DnD to GtdDndRow

 src/gtd-dnd-row.c        |    4 ++--
 src/gtd-dnd-row.h        |   11 +++++++++++
 src/gtd-task-list-view.c |   26 +++++++++++++++-----------
 3 files changed, 28 insertions(+), 13 deletions(-)
---
diff --git a/src/gtd-dnd-row.c b/src/gtd-dnd-row.c
index 72df094..ba73cd8 100644
--- a/src/gtd-dnd-row.c
+++ b/src/gtd-dnd-row.c
@@ -126,7 +126,7 @@ gtd_dnd_row_drag_leave (GtkWidget      *widget,
   self->has_dnd = FALSE;
 }
 
-static gboolean
+gboolean
 gtd_dnd_row_drag_motion (GtkWidget      *widget,
                          GdkDragContext *context,
                          gint            x,
@@ -162,7 +162,7 @@ gtd_dnd_row_drag_motion (GtkWidget      *widget,
   return TRUE;
 }
 
-static gboolean
+gboolean
 gtd_dnd_row_drag_drop (GtkWidget      *widget,
                        GdkDragContext *context,
                        gint            x,
diff --git a/src/gtd-dnd-row.h b/src/gtd-dnd-row.h
index 338e34f..d52775d 100644
--- a/src/gtd-dnd-row.h
+++ b/src/gtd-dnd-row.h
@@ -37,6 +37,17 @@ void                 gtd_dnd_row_set_row_above                   (GtdDndRow
                                                                   GtdTaskRow         *row);
 
 
+gboolean             gtd_dnd_row_drag_drop                       (GtkWidget          *widget,
+                                                                  GdkDragContext     *context,
+                                                                  gint                x,
+                                                                  gint                y,
+                                                                  guint               time);
+
+gboolean             gtd_dnd_row_drag_motion                     (GtkWidget          *widget,
+                                                                  GdkDragContext     *context,
+                                                                  gint                x,
+                                                                  gint                y,
+                                                                  guint               time);
 
 gboolean             gtd_dnd_row_has_dnd                         (GtdDndRow          *self);
 
diff --git a/src/gtd-task-list-view.c b/src/gtd-task-list-view.c
index 71cc805..325c9b2 100644
--- a/src/gtd-task-list-view.c
+++ b/src/gtd-task-list-view.c
@@ -989,6 +989,16 @@ gtd_task_list_view_drag_motion (GtkWidget      *widget,
       gtk_list_box_invalidate_sort (priv->listbox);
     }
 
+  /*
+   * Also pass the current motion to the DnD row, so it correctly
+   * adjusts itself - even when the DnD is hovering another row.
+   */
+  gtd_dnd_row_drag_motion (GTK_WIDGET (priv->dnd_row),
+                           context,
+                           x,
+                           y,
+                           time);
+
   gdk_drag_status (context, GDK_ACTION_COPY, time);
 
   return TRUE;
@@ -1002,20 +1012,14 @@ gtd_task_list_view_drag_drop (GtkWidget      *widget,
                               guint           time)
 {
   GtdTaskListViewPrivate *priv;
-  GtkWidget *source_widget, *row;
 
   priv = gtd_task_list_view_get_instance_private (GTD_TASK_LIST_VIEW (widget));
 
-  gtk_widget_hide (priv->dnd_row);
-
-  /*
-   * When the drag operation began, the source row was hidden. Now is the time
-   * to show it again.
-   */
-  source_widget = gtk_drag_get_source_widget (context);
-  row = gtk_widget_get_ancestor (source_widget, GTK_TYPE_LIST_BOX_ROW);
-
-  gtk_widget_show (row);
+  gtd_dnd_row_drag_drop (GTK_WIDGET (priv->dnd_row),
+                         context,
+                         x,
+                         y,
+                         time);
 
   return TRUE;
 }