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// 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.
#ifndef UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
#define UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
#pragma once
#include "base/compiler_specific.h"
#include "ui/gfx/rect.h"
#include "ui/views/controls/menu/native_menu_host_delegate.h"
#include "ui/views/widget/widget.h"
namespace views {
class NativeWidget;
class SubmenuView;
class View;
class Widget;
// SubmenuView uses a MenuHost to house the SubmenuView.
//
// SubmenuView owns the MenuHost. When SubmenuView is done with the MenuHost
// |DestroyMenuHost| is invoked. The one exception to this is if the native
// OS destroys the widget out from under us, in which case |MenuHostDestroyed|
// is invoked back on the SubmenuView and the SubmenuView then drops references
// to the MenuHost.
class MenuHost : public Widget {
public:
explicit MenuHost(SubmenuView* submenu);
virtual ~MenuHost();
// Initializes and shows the MenuHost.
void InitMenuHost(Widget* parent,
const gfx::Rect& bounds,
View* contents_view,
bool do_capture);
// Returns true if the menu host is visible.
bool IsMenuHostVisible();
// Shows the menu host. If |do_capture| is true the menu host should do a
// mouse grab.
void ShowMenuHost(bool do_capture);
// Hides the menu host.
void HideMenuHost();
// Destroys and deletes the menu host.
void DestroyMenuHost();
// Sets the bounds of the menu host.
void SetMenuHostBounds(const gfx::Rect& bounds);
// Releases a mouse grab installed by |ShowMenuHost|.
void ReleaseMenuHostCapture();
private:
// Overridden from Widget:
virtual internal::RootView* CreateRootView() OVERRIDE;
virtual bool ShouldReleaseCaptureOnMouseReleased() const OVERRIDE;
virtual void OnMouseCaptureLost() OVERRIDE;
virtual void OnNativeWidgetDestroyed() OVERRIDE;
virtual void OnOwnerClosing() OVERRIDE;
// The view we contain.
SubmenuView* submenu_;
// If true, DestroyMenuHost has been invoked.
bool destroying_;
// If true and capture is lost we don't notify the delegate.
bool ignore_capture_lost_;
DISALLOW_COPY_AND_ASSIGN(MenuHost);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
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