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// Copyright (c) 2011 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 VIEWS_CONTROLS_MENU_MENU_HOST_H_
#define VIEWS_CONTROLS_MENU_MENU_HOST_H_
#pragma once
#include "base/compiler_specific.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/rect.h"
#include "views/controls/menu/native_menu_host_delegate.h"
#include "views/widget/widget.h"
namespace views {
class NativeMenuHost;
class NativeWidget;
class SubmenuView;
class View;
class Widget;
// SubmenuView uses a MenuHost to house the SubmenuView. MenuHost typically
// extends the native Widget type, but is defined here for clarity of what
// methods SubmenuView uses.
//
// 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 internal::NativeMenuHostDelegate {
public:
explicit MenuHost(SubmenuView* submenu);
virtual ~MenuHost();
// Initializes and shows the MenuHost.
void InitMenuHost(gfx::NativeWindow 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();
// Returns the native window of the MenuHost.
gfx::NativeWindow GetMenuHostWindow();
Widget* GetWidget();
NativeWidget* GetNativeWidget();
private:
// Overridden from Widget:
virtual RootView* CreateRootView() OVERRIDE;
virtual bool ShouldReleaseCaptureOnMouseReleased() const OVERRIDE;
// Overridden from NativeMenuHostDelegate:
virtual void OnNativeMenuHostDestroy() OVERRIDE;
virtual void OnNativeMenuHostCancelCapture() OVERRIDE;
virtual internal::NativeWidgetDelegate* AsNativeWidgetDelegate() OVERRIDE;
NativeMenuHost* native_menu_host_;
// The view we contain.
SubmenuView* submenu_;
// If true, DestroyMenuHost has been invoked.
bool destroying_;
DISALLOW_COPY_AND_ASSIGN(MenuHost);
};
} // namespace views
#endif // VIEWS_CONTROLS_MENU_MENU_HOST_H_
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