ui/wm/core/cursor_manager.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_WM_CORE_CURSOR_MANAGER_H_
   6 #define UI_WM_CORE_CURSOR_MANAGER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/observer_list.h"
  12 #include "ui/aura/client/cursor_client.h"
  13 #include "ui/base/cursor/cursor.h"
  14 #include "ui/gfx/geometry/point.h"
  15 #include "ui/gfx/native_widget_types.h"
  16 #include "ui/wm/core/native_cursor_manager_delegate.h"
  17 #include "ui/wm/wm_export.h"
  18
  19 namespace gfx {
  20 class Display;
  21 }
  22
  23 namespace ui {
  24 class KeyEvent;
  25 }
  26
  27 namespace wm {
  28
  29 namespace internal {
  30 class CursorState;
  31 }
  32
  33 class NativeCursorManager;
  34
  35 // This class receives requests to change cursor properties, as well as
  36 // requests to queue any further changes until a later time. It sends changes
  37 // to the NativeCursorManager, which communicates back to us when these changes
  38 // were made through the NativeCursorManagerDelegate interface.
  39 class WM_EXPORT CursorManager : public aura::client::CursorClient,
  40                                 public NativeCursorManagerDelegate {
  41  public:
  42   explicit CursorManager(scoped_ptr<NativeCursorManager> delegate);
  43   ~CursorManager() override;
  44
  45   // Overridden from aura::client::CursorClient:
  46   void SetCursor(gfx::NativeCursor) override;
  47   gfx::NativeCursor GetCursor() const override;
  48   void ShowCursor() override;
  49   void HideCursor() override;
  50   bool IsCursorVisible() const override;
  51   void SetCursorSet(ui::CursorSetType cursor_set) override;
  52   ui::CursorSetType GetCursorSet() const override;
  53   void EnableMouseEvents() override;
  54   void DisableMouseEvents() override;
  55   bool IsMouseEventsEnabled() const override;
  56   void SetDisplay(const gfx::Display& display) override;
  57   void LockCursor() override;
  58   void UnlockCursor() override;
  59   bool IsCursorLocked() const override;
  60   void AddObserver(aura::client::CursorClientObserver* observer) override;
  61   void RemoveObserver(aura::client::CursorClientObserver* observer) override;
  62   bool ShouldHideCursorOnKeyEvent(const ui::KeyEvent& event) const override;
  63
  64  private:
  65   // Overridden from NativeCursorManagerDelegate:
  66   void CommitCursor(gfx::NativeCursor cursor) override;
  67   void CommitVisibility(bool visible) override;
  68   void CommitCursorSet(ui::CursorSetType cursor_set) override;
  69   void CommitMouseEventsEnabled(bool enabled) override;
  70
  71   scoped_ptr<NativeCursorManager> delegate_;
  72
  73   // Number of times LockCursor() has been invoked without a corresponding
  74   // UnlockCursor().
  75   int cursor_lock_count_;
  76
  77   // The current state of the cursor.
  78   scoped_ptr<internal::CursorState> current_state_;
  79
  80   // The cursor state to restore when the cursor is unlocked.
  81   scoped_ptr<internal::CursorState> state_on_unlock_;
  82
  83   base::ObserverList<aura::client::CursorClientObserver> observers_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(CursorManager);
  86 };
  87
  88 }  // namespace wm
  89
  90 #endif  // UI_WM_CORE_CURSOR_MANAGER_H_