[gtk/wip/otte/dnd: 4/9] testdnd3: Use GValue dnd

[Benjamin Otte <otte src gnome org>]

commit dbad4404680204923df9abaa37ff077d1e350294
Author: Benjamin Otte <otte redhat com>
Date:   Sun Feb 16 14:29:22 2020 +0100

    testdnd3: Use GValue dnd

 tests/testdnd3.c | 39 +++++++++++++++++++++------------------
 1 file changed, 21 insertions(+), 18 deletions(-)
---
diff --git a/tests/testdnd3.c b/tests/testdnd3.c
index c63bb0d9db..67a0b61065 100644
--- a/tests/testdnd3.c
+++ b/tests/testdnd3.c
@@ -5,8 +5,6 @@ prepare (GtkDragSource *source,  double x, double y)
 {
   GtkWidget *canvas;
   GtkWidget *item;
-  GdkContentProvider *provider;
-  GBytes *bytes;
 
   canvas = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (source));
   item = gtk_widget_pick (canvas, x, y, GTK_PICK_DEFAULT);
@@ -14,13 +12,9 @@ prepare (GtkDragSource *source,  double x, double y)
   if (!GTK_IS_LABEL (item))
     return NULL;
 
-  bytes = g_bytes_new (&item, sizeof (gpointer));
-  provider = gdk_content_provider_new_for_bytes ("CANVAS_ITEM", bytes);
-  g_bytes_unref (bytes);
-
   g_object_set_data (G_OBJECT (canvas), "dragged-item", item);
 
-  return provider;
+  return gdk_content_provider_new_typed (GTK_TYPE_WIDGET, item);
 }
 
 static void
@@ -48,6 +42,14 @@ drag_end (GtkDragSource *source, GdkDrag *drag)
   gtk_widget_set_opacity (item, 1.0);
 }
 
+static void
+drag_cancel (GtkDragSource       *source,
+             GdkDrag             *drag,
+             GdkDragCancelReason  reason)
+{
+  drag_end (source, drag);
+}
+
 typedef struct {
   GtkWidget *canvas;
   double x;
@@ -81,18 +83,20 @@ got_data (GObject      *source,
 {
   GdkDrop *drop = GDK_DROP (source);
   DropData *data = user_data;
-  GInputStream *stream;
-  GBytes *bytes;
   GtkWidget *item;
-  const char *mime_type;
-  GError *error = NULL;
+  const GValue *value;
   TransformData *transform_data;
   GtkWidget *canvas;
   GtkWidget *last_child;
 
-  stream = gdk_drop_read_finish (drop, result, &mime_type, &error);
-  bytes = g_input_stream_read_bytes (stream, sizeof (gpointer), NULL, NULL);
-  item = (gpointer) *(gpointer *)g_bytes_get_data (bytes, NULL);
+  value = gdk_drop_read_value_finish (drop, result, NULL);
+  if (value == NULL)
+    {
+      gdk_drop_finish (drop, 0);
+      return;
+    }
+
+  item = g_value_get_object (value);
 
   transform_data = g_object_get_data (G_OBJECT (item), "transform-data");
 
@@ -108,8 +112,6 @@ got_data (GObject      *source,
 
   gdk_drop_finish (drop, GDK_ACTION_MOVE);
 
-  g_bytes_unref (bytes);
-  g_object_unref (stream);
   g_free (data);
 }
 
@@ -126,7 +128,7 @@ drag_drop (GtkDropTarget *dest,
   data->x = x;
   data->y = y;
 
-  gdk_drop_read_async (drop, (const char *[]){"CANVAS_ITEM", NULL}, G_PRIORITY_DEFAULT, NULL, got_data, 
data);
+  gdk_drop_read_value_async (drop, GTK_TYPE_WIDGET, G_PRIORITY_DEFAULT, NULL, got_data, data);
 
   return TRUE;
 }
@@ -149,9 +151,10 @@ canvas_new (void)
   g_signal_connect (source, "prepare", G_CALLBACK (prepare), NULL);
   g_signal_connect (source, "drag-begin", G_CALLBACK (drag_begin), NULL);
   g_signal_connect (source, "drag-end", G_CALLBACK (drag_end), NULL);
+  g_signal_connect (source, "drag-cancel", G_CALLBACK (drag_cancel), NULL);
   gtk_widget_add_controller (canvas, GTK_EVENT_CONTROLLER (source));
 
-  formats = gdk_content_formats_new ((const char *[]){"CANVAS_ITEM", NULL}, 1);
+  formats = gdk_content_formats_new_for_gtype (GTK_TYPE_WIDGET);
   dest = gtk_drop_target_new (formats, GDK_ACTION_MOVE);
   g_signal_connect (dest, "drag-drop", G_CALLBACK (drag_drop), NULL);
   gtk_widget_add_controller (canvas, GTK_EVENT_CONTROLLER (dest));