From ad593f3c5bbc5317dee65b9686203a3e547cb48b Mon Sep 17 00:00:00 2001
From: Eric Koegel <eric.koegel@gmail.com>
Date: Fri, 23 Dec 2011 09:42:55 +0300
Subject: [PATCH] Added dnd support for image files. Bug 3688.

---
 src/image_viewer.c |   45 ++++++++++++++++++++++++++++++++++++++++++---
 src/main_window.c  |   24 ++++++++++++++++++++++++
 2 files changed, 66 insertions(+), 3 deletions(-)

diff --git a/src/image_viewer.c b/src/image_viewer.c
index b7f5611..b009be0 100644
--- a/src/image_viewer.c
+++ b/src/image_viewer.c
@@ -188,6 +188,9 @@ static void
 cb_rstto_image_loader_closed (GdkPixbufLoader *loader, RsttoImageViewerTransaction *transaction);
 static gboolean
 cb_rstto_image_viewer_update_pixbuf (RsttoImageViewer *viewer);
+static void
+cb_rstto_image_viewer_dnd (GtkWidget *widget, GdkDragContext *context, gint x, gint y, GtkSelectionData *data,
+                           guint info, guint time_, RsttoImageViewer *viewer);
 
 static gboolean
 rstto_scroll_event (
@@ -308,6 +311,12 @@ rstto_image_viewer_init ( GObject *object )
             G_CALLBACK (cb_rstto_zoom_direction_changed),
             viewer);
 
+    g_signal_connect (
+            G_OBJECT(viewer),
+            "drag-data-received",
+            G_CALLBACK (cb_rstto_image_viewer_dnd),
+            viewer);
+
     gtk_widget_set_events (GTK_WIDGET(viewer),
                            GDK_BUTTON_PRESS_MASK |
                            GDK_BUTTON_RELEASE_MASK |
@@ -315,10 +324,10 @@ rstto_image_viewer_init ( GObject *object )
                            GDK_ENTER_NOTIFY_MASK |
                            GDK_POINTER_MOTION_MASK);
 
-    /*
-    gtk_drag_dest_set(GTK_WIDGET(viewer), 0, drop_targets, G_N_ELEMENTS(drop_targets),
+
+    gtk_drag_dest_set(GTK_WIDGET(viewer), GTK_DEST_DEFAULT_ALL, NULL, 0,
                       GDK_ACTION_COPY | GDK_ACTION_LINK | GDK_ACTION_MOVE | GDK_ACTION_PRIVATE);
-    */
+    gtk_drag_dest_add_uri_targets (GTK_WIDGET(viewer));
 }
 
 /**
@@ -369,6 +378,13 @@ rstto_image_viewer_class_init(RsttoImageViewerClass *viewer_class)
                                 NULL, NULL,
                                 g_cclosure_marshal_VOID__VOID,
                                 G_TYPE_NONE, 0);
+    g_signal_new ("files-dnd",  G_TYPE_FROM_CLASS (object_class),
+                                G_SIGNAL_RUN_FIRST,
+                                0,
+                                NULL, NULL,
+                                g_cclosure_marshal_VOID__POINTER,
+                                G_TYPE_NONE, 1,
+                                G_TYPE_POINTER);
 }
 
 /**
@@ -2476,3 +2492,26 @@ rstto_popup_menu (
     }
     return FALSE;
 }
+
+static void
+cb_rstto_image_viewer_dnd (GtkWidget *widget, GdkDragContext *context, gint x, gint y, GtkSelectionData *data,
+              guint info, guint time_, RsttoImageViewer *viewer)
+{
+    g_return_if_fail ( RSTTO_IS_IMAGE_VIEWER(viewer) );
+
+    if ((data->length >= 0) && (data->format == 8))
+    {
+        gchar **uris;
+
+        uris = g_uri_list_extract_uris ((const gchar*)data->data);
+
+        g_signal_emit_by_name(viewer, "files-dnd", uris);
+
+        gtk_drag_finish (context, TRUE, FALSE, time_);
+        g_strfreev(uris);
+    }
+    else
+    {
+        gtk_drag_finish (context, FALSE, FALSE, time_);
+    }
+}
diff --git a/src/main_window.c b/src/main_window.c
index 933c58b..9f1b00c 100644
--- a/src/main_window.c
+++ b/src/main_window.c
@@ -192,6 +192,8 @@ static void
 cb_rstto_main_window_save_copy (GtkWidget *widget, RsttoMainWindow *window);
 static void
 cb_rstto_main_window_delete (GtkWidget *widget, RsttoMainWindow *window);
+static void
+cb_rstto_main_window_dnd_files (GtkWidget *widget, gchar **uris, RsttoMainWindow *window);
 
 static void
 cb_rstto_main_window_set_as_wallpaper (GtkWidget *widget, RsttoMainWindow *window);
@@ -707,6 +709,7 @@ rstto_main_window_init (RsttoMainWindow *window)
     g_signal_connect(G_OBJECT(window->priv->image_list_toolbar), "button-press-event", G_CALLBACK(cb_rstto_main_window_navigationtoolbar_button_press_event), window);
     g_signal_connect(G_OBJECT(window->priv->thumbnailbar), "button-press-event", G_CALLBACK(cb_rstto_main_window_navigationtoolbar_button_press_event), window);
     g_signal_connect(G_OBJECT(window->priv->image_viewer), "size-ready", G_CALLBACK(cb_rstto_main_window_update_statusbar), window);
+    g_signal_connect(G_OBJECT(window->priv->image_viewer), "files-dnd", G_CALLBACK(cb_rstto_main_window_dnd_files), window);
 
     if ( TRUE == rstto_settings_get_boolean_property (window->priv->settings_manager, "merge-toolbars"))
     {
@@ -3006,6 +3009,27 @@ cb_rstto_main_window_delete (
     g_object_unref (file);
 }
 
+static void
+cb_rstto_main_window_dnd_files (GtkWidget *widget, gchar **uris, RsttoMainWindow *window)
+{
+    RsttoFile *file;
+    guint n;
+
+    for(n = 0; n < g_strv_length (uris); n++)
+    {
+        file = rstto_file_new (g_file_new_for_uri (uris[n]));
+
+        if (g_str_has_prefix (rstto_file_get_content_type (file), "image"))
+        {
+            rstto_image_list_add_file(window->priv->image_list, file, NULL);
+        }
+    }
+    if(file)
+    {
+        rstto_image_list_iter_find_file (window->priv->iter, file );
+    }
+}
+
 /**********************/
 /* PRINTING CALLBACKS */
 /**********************/
-- 
1.7.5.4