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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_WM_PUBLIC_ACTIVATION_CLIENT_H_
#define UI_WM_PUBLIC_ACTIVATION_CLIENT_H_
#include "ui/aura/aura_export.h"
namespace ui {
class Event;
}
namespace aura {
class Window;
namespace client {
class ActivationChangeObserver;
// An interface implemented by an object that manages window activation.
class AURA_EXPORT ActivationClient {
public:
// Adds/Removes ActivationChangeObservers.
virtual void AddObserver(ActivationChangeObserver* observer) = 0;
virtual void RemoveObserver(ActivationChangeObserver* observer) = 0;
// Activates |window|. If |window| is NULL, nothing happens.
virtual void ActivateWindow(Window* window) = 0;
// Deactivates |window|. What (if anything) is activated next is up to the
// client. If |window| is NULL, nothing happens.
virtual void DeactivateWindow(Window* window) = 0;
// Retrieves the active window, or NULL if there is none.
virtual Window* GetActiveWindow() = 0;
// Retrieves the activatable window for |window|, or NULL if there is none.
// Note that this is often but not always the toplevel window (see
// GetToplevelWindow() below), as the toplevel window may not be activatable
// (for example it may be blocked by a modal transient, or some other
// condition).
virtual Window* GetActivatableWindow(Window* window) = 0;
// Retrieves the toplevel window for |window|, or NULL if there is none.
virtual Window* GetToplevelWindow(Window* window) = 0;
// Invoked prior to |window| getting focus as a result of the |event|. |event|
// may be NULL. Returning false blocks |window| from getting focus.
virtual bool OnWillFocusWindow(Window* window, const ui::Event* event) = 0;
// Returns true if |window| can be activated, false otherwise. If |window| has
// a modal child it can not be activated.
virtual bool CanActivateWindow(Window* window) const = 0;
protected:
virtual ~ActivationClient() {}
};
// Sets/Gets the activation client on the root Window.
AURA_EXPORT void SetActivationClient(Window* root_window,
ActivationClient* client);
AURA_EXPORT ActivationClient* GetActivationClient(Window* root_window);
// Some types of transient window are only visible when active.
// The transient parents of these windows may have visual appearance properties
// that differ from transient parents that can be deactivated.
// The presence of this property implies these traits.
// TODO(beng): currently the UI framework (views) implements the actual
// close-on-deactivate component of this feature but it should be
// possible to implement in the aura client.
AURA_EXPORT void SetHideOnDeactivate(Window* window, bool hide_on_deactivate);
AURA_EXPORT bool GetHideOnDeactivate(Window* window);
} // namespace clients
} // namespace aura
#endif // UI_WM_PUBLIC_ACTIVATION_CLIENT_H_
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