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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.
#include "base/strings/string16.h"
#include "ui/aura/aura_export.h"
#include "ui/base/cursor/cursor.h"
#include "ui/gfx/native_widget_types.h"
namespace gfx {
class Display;
namespace display {
using Display = gfx::Display;
namespace ui {
class KeyEvent;
namespace aura {
class Window;
namespace client {
class CursorClientObserver;
// An interface that receives cursor change events.
class AURA_EXPORT CursorClient {
// Notes that |window| has requested the change to |cursor|.
virtual void SetCursor(gfx::NativeCursor cursor) = 0;
// Returns the current cursor.
virtual gfx::NativeCursor GetCursor() const = 0;
// Shows the cursor. This does not take effect When mouse events are disabled.
virtual void ShowCursor() = 0;
// Hides the cursor. Mouse events keep being sent even when the cursor is
// invisible.
virtual void HideCursor() = 0;
// Sets the type of the mouse cursor icon.
virtual void SetCursorSet(ui::CursorSetType cursor_set) = 0;
// Gets the type of the mouse cursor icon.
virtual ui::CursorSetType GetCursorSet() const = 0;
// Gets whether the cursor is visible.
virtual bool IsCursorVisible() const = 0;
// Makes mouse events start being sent and shows the cursor if it was hidden
// with DisableMouseEvents.
virtual void EnableMouseEvents() = 0;
// Makes mouse events stop being sent and hides the cursor if it is visible.
virtual void DisableMouseEvents() = 0;
// Returns true if mouse events are enabled.
virtual bool IsMouseEventsEnabled() const = 0;
// Sets the display for the cursor.
virtual void SetDisplay(const display::Display& display) = 0;
// Locks the cursor change. The cursor type, cursor visibility, and mouse
// events enable state never change as long as lock is held by anyone.
virtual void LockCursor() = 0;
// Unlocks the cursor change. If all the locks are released, the cursor type,
// cursor visibility, and mouse events enable state are restored to the ones
// set by the lastest call of SetCursor, ShowCursor/HideCursor, and
// EnableMouseEvents/DisableMouseEvents.
virtual void UnlockCursor() = 0;
// Returns true if the cursor is locked.
virtual bool IsCursorLocked() const = 0;
// Used to add or remove a CursorClientObserver.
virtual void AddObserver(CursorClientObserver* observer) = 0;
virtual void RemoveObserver(CursorClientObserver* observer) = 0;
// Returns true if the mouse cursor should be hidden on |event|.
virtual bool ShouldHideCursorOnKeyEvent(const ui::KeyEvent& event) const = 0;
virtual ~CursorClient() {}
// Sets/Gets the activation client for the specified window.
AURA_EXPORT void SetCursorClient(Window* window,
CursorClient* client);
AURA_EXPORT CursorClient* GetCursorClient(Window* window);
} // namespace client
} // namespace aura