ash/wm/image_cursors.h

   1 // Copyright (c) 2012 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 ASH_WM_IMAGE_CURSORS_H_
   6 #define ASH_WM_IMAGE_CURSORS_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "ui/gfx/native_widget_types.h"
  11
  12 namespace ui {
  13 class CursorLoader;
  14 }
  15
  16 namespace ash {
  17
  18 // A utility class that provides cursors for NativeCursors for which we have
  19 // image resources.
  20 class ASH_EXPORT ImageCursors {
  21  public:
  22   ImageCursors();
  23   ~ImageCursors();
  24
  25   // Returns the device scale factor of cursors. The device scale factor must
  26   // be set by SetDeviceScaleFactor at least once before using this.
  27   float GetDeviceScaleFactor() const;
  28
  29   // Sets the device scale factor of the cursors with |device_scale_factor| and
  30   // reloads the cursor images if necessary. Returns true if the cursor image
  31   // is reloaded.
  32   bool SetDeviceScaleFactor(float device_scale_factor);
  33
  34   // Sets the platform cursor based on the native type of |cursor|.
  35   void SetPlatformCursor(gfx::NativeCursor* cursor);
  36
  37  private:
  38   scoped_ptr<ui::CursorLoader> cursor_loader_;
  39
  40   DISALLOW_COPY_AND_ASSIGN(ImageCursors);
  41 };
  42
  43 }  // namespace ash
  44
  45 #endif  // ASH_WM_IMAGE_CURSORS_H_