ash/frame/header_painter.h

   1 // Copyright 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 ASH_FRAME_HEADER_PAINTER_H_
   6 #define ASH_FRAME_HEADER_PAINTER_H_
   7
   8 #include "ash/ash_export.h"
   9
  10 namespace gfx {
  11 class Canvas;
  12 }
  13
  14 namespace ash {
  15
  16 // Helper class for painting the window header.
  17 class ASH_EXPORT HeaderPainter {
  18  public:
  19   enum Mode {
  20     MODE_ACTIVE,
  21     MODE_INACTIVE
  22   };
  23
  24   virtual ~HeaderPainter() {
  25   }
  26
  27   // Returns the header's minimum width.
  28   virtual int GetMinimumHeaderWidth() const = 0;
  29
  30   // Paints the header.
  31   virtual void PaintHeader(gfx::Canvas* canvas, Mode mode) = 0;
  32
  33   // Performs layout for the header.
  34   virtual void LayoutHeader() = 0;
  35
  36   // Gets / sets how much of the header is painted. This allows the tabstrip to
  37   // affect the header height. This height does not affect LayoutHeader().
  38   virtual int GetHeaderHeightForPainting() const = 0;
  39   virtual void SetHeaderHeightForPainting(int height_for_painting) = 0;
  40
  41   // Schedule a re-paint of the entire title.
  42   virtual void SchedulePaintForTitle() = 0;
  43 };
  44
  45 }  // namespace ash
  46
  47 #endif  // ASH_FRAME_HEADER_PAINTER_H_