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 UI_MESSAGE_CENTER_BOUNDED_LABEL_H_
6#define UI_MESSAGE_CENTER_BOUNDED_LABEL_H_
7
8#include <list>
9#include <map>
10
11#include "base/memory/scoped_ptr.h"
12#include "third_party/skia/include/core/SkColor.h"
13#include "ui/message_center/message_center_export.h"
14#include "ui/views/view.h"
15
16namespace gfx {
17class Font;
18}
19
20namespace message_center {
21
22class InnerBoundedLabel;
23
24namespace test {
25class BoundedLabelTest;
26}
27
28// BoundedLabels display left aligned text up to a maximum number of lines, with
29// ellipsis at the end of the last line for any omitted text. BoundedLabel is a
30// direct subclass of views::Views rather than a subclass of views::Label
31// to avoid exposing some of views::Label's methods that can't be made to work
32// with BoundedLabel. See the description of InnerBoundedLabel in the
33// bounded_label.cc file for details.
34class MESSAGE_CENTER_EXPORT BoundedLabel : public views::View {
35 public:
36  BoundedLabel(const string16& text, gfx::Font font);
37  BoundedLabel(const string16& text);
38  virtual ~BoundedLabel();
39
40  void SetColors(SkColor textColor, SkColor backgroundColor);
41  void SetLineHeight(int height);  // Pass in 0 for default height.
42  void SetLineLimit(int lines);  // Pass in -1 for no limit.
43
44  int GetLineHeight() const;
45  int GetLineLimit() const;
46
47  // Pass in a -1 width to use the preferred width, a -1 limit to skip limits.
48  int GetLinesForWidthAndLimit(int width, int limit);
49  gfx::Size GetSizeForWidthAndLines(int width, int lines);
50
51  // Overridden from views::View.
52  virtual int GetBaseline() const OVERRIDE;
53  virtual gfx::Size GetPreferredSize() OVERRIDE;
54  virtual int GetHeightForWidth(int width) OVERRIDE;
55  virtual void Paint(gfx::Canvas* canvas) OVERRIDE;
56  virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE;
57  virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
58
59 protected:
60  // Overridden from views::View.
61  virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE;
62  virtual void OnNativeThemeChanged(const ui::NativeTheme* theme) OVERRIDE;
63
64 private:
65  friend class test::BoundedLabelTest;
66
67  string16 GetWrappedTextForTest(int width, int lines);
68
69  scoped_ptr<InnerBoundedLabel> label_;
70  int line_limit_;
71
72  DISALLOW_COPY_AND_ASSIGN(BoundedLabel);
73};
74
75}  // namespace message_center
76
77#endif  // UI_MESSAGE_CENTER_BOUNDED_LABEL_H_
78