blob: 4dfe2fbacf468a34b39ab815265d8a65c0de1dc0 [file] [log] [blame]
// Copyright (c) 2012 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.
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "ui/base/ui_base_types.h"
#include "ui/views/views_export.h"
namespace gfx {
class Point;
namespace views {
class View;
// ContextMenuController is responsible for showing the context menu for a
// View. To use a ContextMenuController invoke set_context_menu_controller on a
// View. When the appropriate user gesture occurs ShowContextMenu is invoked
// on the ContextMenuController.
// Setting a ContextMenuController on a view makes the view process mouse
// events.
// It is up to subclasses that do their own mouse processing to invoke
// the appropriate ContextMenuController method, typically by invoking super's
// implementation for mouse processing.
class VIEWS_EXPORT ContextMenuController {
// Invoked to show the context menu for |source|. |point| is in screen
// coordinates. This method also prevents reentrant calls.
void ShowContextMenuForView(View* source,
const gfx::Point& point,
ui::MenuSourceType source_type);
virtual ~ContextMenuController();
// Subclasses should override this method.
virtual void ShowContextMenuForViewImpl(View* source,
const gfx::Point& point,
ui::MenuSourceType source_type) = 0;
// Used as a flag to prevent a re-entrancy in ShowContextMenuForView().
// This is most relevant to Linux, where spawning the textfield context menu
// spins a nested message loop that processes input events, which may attempt
// to trigger another context menu.
bool is_opening_ = false;
base::WeakPtrFactory<ContextMenuController> weak_factory_{this};
} // namespace views