src/chrome/browser/ui/views/detachable_toolbar_view.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 CHROME_BROWSER_UI_VIEWS_DETACHABLE_TOOLBAR_VIEW_H_
   6 #define CHROME_BROWSER_UI_VIEWS_DETACHABLE_TOOLBAR_VIEW_H_
   7
   8 #include "chrome/browser/ui/host_desktop.h"
   9 #include "ui/views/accessible_pane_view.h"
  10
  11 struct SkRect;
  12
  13 // DetachableToolbarView contains functionality common to views that can detach
  14 // from the Chrome frame, such as the BookmarkBarView and the Extension shelf.
  15 class DetachableToolbarView : public views::AccessiblePaneView {
  16  public:
  17   // The color gradient start value close to the edge of the divider.
  18   static const SkColor kEdgeDividerColor;
  19   // The color gradient value for the middle of the divider.
  20   static const SkColor kMiddleDividerColor;
  21
  22   DetachableToolbarView() {}
  23   virtual ~DetachableToolbarView() {}
  24
  25   // Whether the view is currently detached from the Chrome frame.
  26   virtual bool IsDetached() const = 0;
  27
  28   // Gets the current state of the resize animation (show/hide).
  29   virtual double GetAnimationValue() const = 0;
  30
  31   // Gets the current amount of overlap atop the browser toolbar.
  32   virtual int GetToolbarOverlap() const = 0;
  33
  34   // Paints the background (including the theme image behind content area) for
  35   // the bar/shelf when it is attached to the top toolbar into |bounds|.
  36   // |background_origin| is the origin to use for painting the theme image.
  37   static void PaintBackgroundAttachedMode(
  38       gfx::Canvas* canvas,
  39       ui::ThemeProvider* theme_provider,
  40       const gfx::Rect& bounds,
  41       const gfx::Point& background_origin,
  42      chrome::HostDesktopType host_desktop_type);
  43
  44   // Calculate the rect for the content area of the bar/shelf. This is only
  45   // needed when the bar/shelf is detached from the Chrome frame (otherwise the
  46   // content area is the whole area of the bar/shelf. When detached, however,
  47   // only a small round rectangle is for drawing our content on. This calculates
  48   // how big this area is, where it is located within the shelf and how round
  49   // the edges should be.
  50   static void CalculateContentArea(double animation_state,
  51                                    double horizontal_padding,
  52                                    double vertical_padding,
  53                                    SkRect* rect,
  54                                    double* roundness,
  55                                    views::View* view);
  56
  57   // Paint the horizontal border separating the shelf/bar from the toolbar or
  58   // page content according to |at_top| with |color|.
  59   static void PaintHorizontalBorder(gfx::Canvas* canvas,
  60                                     DetachableToolbarView* view,
  61                                     bool at_top,
  62                                     SkColor color);
  63
  64   // Paint the background of the content area (the surface behind the
  65   // bookmarks). |rect| is the rectangle to paint the background within.
  66   // |roundness| describes the roundness of the corners.
  67   static void PaintContentAreaBackground(gfx::Canvas* canvas,
  68                                          ui::ThemeProvider* theme_provider,
  69                                          const SkRect& rect,
  70                                          double roundness);
  71   // Paint the border around the content area (when in detached mode).
  72   static void PaintContentAreaBorder(gfx::Canvas* canvas,
  73                                      ui::ThemeProvider* theme_provider,
  74                                      const SkRect& rect,
  75                                      double roundness);
  76
  77   // Paint a themed gradient divider at location |x|. |height| is the full
  78   // height of the view you want to paint the divider into, not the height of
  79   // the divider. The height of the divider will become:
  80   //   |height| - 2 * |vertical_padding|.
  81   // The color of the divider is a gradient starting with |top_color| at the
  82   // top, and changing into |middle_color| and then over to |bottom_color| as
  83   // you go further down.
  84   static void PaintVerticalDivider(gfx::Canvas* canvas,
  85                                    int x,
  86                                    int height,
  87                                    int vertical_padding,
  88                                    SkColor top_color,
  89                                    SkColor middle_color,
  90                                    SkColor bottom_color);
  91
  92  private:
  93   DISALLOW_COPY_AND_ASSIGN(DetachableToolbarView);
  94 };
  95
  96 #endif  // CHROME_BROWSER_UI_VIEWS_DETACHABLE_TOOLBAR_VIEW_H_