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_DROPDOWN_BAR_VIEW_H_
6#define CHROME_BROWSER_UI_VIEWS_DROPDOWN_BAR_VIEW_H_
7
8#include "chrome/browser/ui/views/dropdown_bar_host.h"
9#include "chrome/browser/ui/views/dropdown_bar_host_delegate.h"
10#include "ui/views/accessible_pane_view.h"
11
12namespace gfx {
13class Canvas;
14class ImageSkia;
15}  // namespace gfx
16
17////////////////////////////////////////////////////////////////////////////////
18//
19// The DropdownBarView is an abstract view to draw the UI controls of the
20// DropdownBarHost.
21//
22////////////////////////////////////////////////////////////////////////////////
23class DropdownBarView : public views::AccessiblePaneView,
24                        public DropdownBarHostDelegate {
25 public:
26  explicit DropdownBarView(DropdownBarHost* host);
27  virtual ~DropdownBarView();
28
29  // Updates the view to let it know where the host is clipping the
30  // dropdown widget (while animating the opening or closing of the widget).
31  virtual void SetAnimationOffset(int offset) OVERRIDE;
32
33  // Returns the offset used while animating.
34  int animation_offset() const { return animation_offset_; }
35
36 protected:
37  // views::View:
38  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
39
40  // Returns the DropdownBarHost that manages this view.
41  DropdownBarHost* host() const { return host_; }
42
43  void SetBackground(const gfx::ImageSkia* left_alpha_mask,
44                     const gfx::ImageSkia* right_alpha_mask);
45  void SetBorderFromIds(int left_border_image_id,
46                        int middle_border_image_id,
47                        int right_border_image_id);
48
49 private:
50  // The dropdown bar host that controls this view.
51  DropdownBarHost* host_;
52
53  // While animating, the host clips the widget and draws only the bottom
54  // part of it. The view needs to know the pixel offset at which we are drawing
55  // the widget so that we can draw the curved edges that attach to the toolbar
56  // in the right location.
57  int animation_offset_;
58
59  DISALLOW_COPY_AND_ASSIGN(DropdownBarView);
60};
61#endif  // CHROME_BROWSER_UI_VIEWS_DROPDOWN_BAR_VIEW_H_
62