Prevents panels attached to shelf from docking

ash/wm/drag_details.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_WM_DRAG_DETAILS_H_
+#define ASH_WM_DRAG_DETAILS_H_
+
+#include "ash/ash_export.h"
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/client/window_move_client.h"
+#include "ui/gfx/rect.h"
+
+namespace aura {
+class Window;
+}
+
+namespace ash {
+class WindowResizer;
+
+namespace wm {
+class WindowState;
+}
+
+struct ASH_EXPORT DragDetails {
+  DragDetails();

[oshima, 2014/01/09 19:13:45]

where is this constructor used?

[varkha, 2014/01/10 01:34:50]

Done. It was not used - removed.

+  DragDetails(aura::Window* window,
+              const gfx::Point& location,
+              int window_component,
+              aura::client::WindowMoveSource source);
+  ~DragDetails();
+
+  // Initial bounds of the window in parent coordinates.
+  const gfx::Rect initial_bounds_in_parent;
+
+  // Restore bounds (in screen coordinates) of the window before the drag
+  // started. Only set if the window is normal and is being dragged.
+  gfx::Rect restore_bounds;
+
+  // Location passed to the constructor, in |window->parent()|'s coordinates.
+  const gfx::Point initial_location_in_parent;
+
+  // Initial opacity of the window.
+  const float initial_opacity;
+
+  // The component the user pressed on.
+  const int window_component;
+
+  // Bitmask of the |kBoundsChange_| constants.
+  const int bounds_change;
+
+  // Bitmask of the |kBoundsChangeDirection_| constants.
+  const int position_change_direction;
+
+  // Bitmask of the |kBoundsChangeDirection_| constants.
+  const int size_change_direction;
+
+  // Will the drag actually modify the window?
+  const bool is_resizable;
+
+  // Source of the event initiating the drag.
+  const aura::client::WindowMoveSource source;
+
+  // True if the window should attach to the shelf after releasing.
+  bool should_attach_to_shelf;
+
+  // WindowResizer that is controlling the drag.
+  WindowResizer* window_resizer;
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_DRAG_DETAILS_H_