ui/views/window/frame_background.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_VIEWS_WINDOW_FRAME_BACKGROUND_H_
   6 #define UI_VIEWS_WINDOW_FRAME_BACKGROUND_H_
   7
   8 #include "base/basictypes.h"
   9 #include "third_party/skia/include/core/SkColor.h"
  10 #include "ui/views/views_export.h"
  11
  12 namespace gfx {
  13 class Canvas;
  14 class ImageSkia;
  15 }
  16
  17 namespace views {
  18
  19 class View;
  20
  21 // FrameBackground handles painting for all the various window frames we
  22 // support in Chrome. It intends to consolidate paint code that historically
  23 // was copied. One frame to rule them all!
  24 class VIEWS_EXPORT FrameBackground {
  25  public:
  26   FrameBackground();
  27   ~FrameBackground();
  28
  29   // Sets the color to draw under the frame images.
  30   void set_frame_color(SkColor color) { frame_color_ = color; }
  31
  32   // Sets the theme image for the top of the window.  May be NULL.
  33   // Memory is owned by the caller.
  34   void set_theme_image(const gfx::ImageSkia* image) { theme_image_ = image; }
  35
  36   // Sets an image that overlays the top window image.  Usually used to add
  37   // edge highlighting to provide the illusion of depth.  May be NULL.
  38   // Memory is owned by the caller.
  39   void set_theme_overlay_image(gfx::ImageSkia* image) {
  40     theme_overlay_image_ = image;
  41   }
  42
  43   // Sets the height of the top area to fill with the default frame color,
  44   // which must extend behind the tab strip.
  45   void set_top_area_height(int height) { top_area_height_ = height; }
  46
  47   // Vertical inset for theme image when drawing maximized.
  48   void set_maximized_top_inset(int inset) { maximized_top_inset_ = inset; }
  49
  50   // Sets images used when drawing the sides of the frame.
  51   // Caller owns the memory.
  52   void SetSideImages(const gfx::ImageSkia* left,
  53                      const gfx::ImageSkia* top,
  54                      const gfx::ImageSkia* right,
  55                      const gfx::ImageSkia* bottom);
  56
  57   // Sets images used when drawing the corners of the frame.
  58   // Caller owns the memory.
  59   void SetCornerImages(const gfx::ImageSkia* top_left,
  60                        const gfx::ImageSkia* top_right,
  61                        const gfx::ImageSkia* bottom_left,
  62                        const gfx::ImageSkia* bottom_right);
  63
  64   // Paints the border for a standard, non-maximized window.  Also paints the
  65   // background of the title bar area, since the top frame border and the
  66   // title bar background are a contiguous component.
  67   void PaintRestored(gfx::Canvas* canvas, View* view) const;
  68
  69   // Paints the border for a maximized window, which does not include the
  70   // window edges.
  71   void PaintMaximized(gfx::Canvas* canvas, View* view) const;
  72
  73  private:
  74   // Fills the frame area with the frame color.
  75   void PaintFrameColor(gfx::Canvas* canvas, View* view) const;
  76
  77   SkColor frame_color_;
  78   const gfx::ImageSkia* theme_image_;
  79   gfx::ImageSkia* theme_overlay_image_;
  80   int top_area_height_;
  81
  82   // Images for the sides of the frame.
  83   const gfx::ImageSkia* left_edge_;
  84   const gfx::ImageSkia* top_edge_;
  85   const gfx::ImageSkia* right_edge_;
  86   const gfx::ImageSkia* bottom_edge_;
  87
  88   // Images for the corners of the frame.
  89   const gfx::ImageSkia* top_left_corner_;
  90   const gfx::ImageSkia* top_right_corner_;
  91   const gfx::ImageSkia* bottom_left_corner_;
  92   const gfx::ImageSkia* bottom_right_corner_;
  93
  94   // Vertical inset for theme image when drawing maximized.
  95   int maximized_top_inset_;
  96
  97   DISALLOW_COPY_AND_ASSIGN(FrameBackground);
  98 };
  99
 100 }  // namespace views
 101
 102 #endif  // UI_VIEWS_WINDOW_FRAME_BACKGROUND_H_