ui/base/cursor/ozone/bitmap_cursor_factory_ozone.h

   1 // Copyright 2014 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_BASE_CURSOR_OZONE_BITMAP_CURSOR_FACTORY_OZONE_H_
   6 #define UI_BASE_CURSOR_OZONE_BITMAP_CURSOR_FACTORY_OZONE_H_
   7
   8 #include <map>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "third_party/skia/include/core/SkBitmap.h"
  12 #include "ui/base/cursor/cursor.h"
  13 #include "ui/base/ui_base_export.h"
  14 #include "ui/gfx/geometry/point.h"
  15 #include "ui/ozone/public/cursor_factory_ozone.h"
  16
  17 namespace ui {
  18
  19 // A cursor that is an SkBitmap combined with a gfx::Point hotspot.
  20 class UI_BASE_EXPORT BitmapCursorOzone
  21     : public base::RefCounted<BitmapCursorOzone> {
  22  public:
  23   BitmapCursorOzone(const SkBitmap& bitmap, const gfx::Point& hotspot)
  24       : bitmap_(bitmap), hotspot_(hotspot) {}
  25
  26   const gfx::Point& hotspot() { return hotspot_; }
  27   const SkBitmap& bitmap() { return bitmap_; }
  28
  29  private:
  30   friend class base::RefCounted<BitmapCursorOzone>;
  31   ~BitmapCursorOzone() {}
  32
  33   SkBitmap bitmap_;
  34   gfx::Point hotspot_;
  35
  36   DISALLOW_COPY_AND_ASSIGN(BitmapCursorOzone);
  37 };
  38
  39 // CursorFactoryOzone implementation for bitmapped cursors.
  40 //
  41 // This is a base class for platforms where PlatformCursor is an SkBitmap
  42 // combined with a gfx::Point for the hotspot.
  43 //
  44 // Subclasses need only implement SetBitmapCursor() as everything else is
  45 // implemented here.
  46 class UI_BASE_EXPORT BitmapCursorFactoryOzone : public CursorFactoryOzone {
  47  public:
  48   BitmapCursorFactoryOzone();
  49   virtual ~BitmapCursorFactoryOzone();
  50
  51   // CursorFactoryOzone:
  52   virtual PlatformCursor GetDefaultCursor(int type) OVERRIDE;
  53   virtual PlatformCursor CreateImageCursor(const SkBitmap& bitmap,
  54                                            const gfx::Point& hotspot) OVERRIDE;
  55   virtual void RefImageCursor(PlatformCursor cursor) OVERRIDE;
  56   virtual void UnrefImageCursor(PlatformCursor cursor) OVERRIDE;
  57   virtual void SetCursor(gfx::AcceleratedWidget widget,
  58                          PlatformCursor cursor) OVERRIDE;
  59
  60   // Set a bitmap cursor for the given window. This must be overridden by
  61   // subclasses. If the cursor is hidden (kCursorNone) then cursor is NULL.
  62   virtual void SetBitmapCursor(gfx::AcceleratedWidget window,
  63                                scoped_refptr<BitmapCursorOzone> cursor);
  64
  65  private:
  66   // Default cursors are cached & owned by the factory.
  67   typedef std::map<int, scoped_refptr<BitmapCursorOzone> > DefaultCursorMap;
  68   DefaultCursorMap default_cursors_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(BitmapCursorFactoryOzone);
  71 };
  72
  73 }  // namespace ui
  74
  75 #endif  // UI_BASE_CURSOR_OZONE_BITMAP_CURSOR_FACTORY_OZONE_H_