ui/gfx/canvas_paint.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 UI_GFX_CANVAS_PAINT_H_
   6 #define UI_GFX_CANVAS_PAINT_H_
   7
   8 #include "ui/base/ui_export.h"
   9 #include "ui/gfx/native_widget_types.h"
  10
  11 namespace gfx {
  12
  13 class Canvas;
  14 class Rect;
  15
  16 class CanvasPaint {
  17  public:
  18   // Creates a canvas that paints to |view| when it is destroyed. The canvas is
  19   // sized to the client area of |view|.
  20   UI_EXPORT static CanvasPaint* CreateCanvasPaint(gfx::NativeView view);
  21
  22   virtual ~CanvasPaint() {}
  23
  24   // Returns true if the canvas has an invalid rect that needs to be repainted.
  25   virtual bool IsValid() const = 0;
  26
  27   // Returns the rectangle that is invalid.
  28   virtual gfx::Rect GetInvalidRect() const = 0;
  29
  30   // Returns the underlying Canvas.
  31   virtual Canvas* AsCanvas() = 0;
  32 };
  33
  34 }  // namespace gfx
  35
  36 #endif  // UI_GFX_CANVAS_PAINT_H_