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_VIEWS_COREWM_TOOLTIP_AURA_H_
6#define UI_VIEWS_COREWM_TOOLTIP_AURA_H_
7
8#include "ui/gfx/screen_type_delegate.h"
9#include "ui/views/controls/label.h"
10#include "ui/views/corewm/tooltip.h"
11#include "ui/views/widget/widget_observer.h"
12
13namespace gfx {
14class FontList;
15}  // namespace gfx
16
17namespace views {
18
19class Widget;
20
21namespace corewm {
22
23// Implementation of Tooltip that shows the tooltip using a Widget and Label.
24class VIEWS_EXPORT TooltipAura : public Tooltip, public WidgetObserver {
25 public:
26  explicit TooltipAura(gfx::ScreenType screen_type);
27  virtual ~TooltipAura();
28
29  // Trims the tooltip to fit in the width |max_width|, setting |text| to the
30  // clipped result, |width| to the width (in pixels) of the clipped text
31  // and |line_count| to the number of lines of text in the tooltip. |font_list|
32  // is used to layout |text|. |max_width| comes from GetMaxWidth().
33  static void TrimTooltipToFit(const gfx::FontList& font_list,
34                               int max_width,
35                               base::string16* text,
36                               int* width,
37                               int* line_count);
38
39 private:
40  // Returns the max width of the tooltip when shown at the specified location.
41  int GetMaxWidth(const gfx::Point& location) const;
42
43  // Adjusts the bounds given by the arguments to fit inside the desktop
44  // and applies the adjusted bounds to the label_.
45  void SetTooltipBounds(const gfx::Point& mouse_pos,
46                        const gfx::Size& tooltip_size);
47
48  // Destroys |widget_|.
49  void DestroyWidget();
50
51  // Tooltip:
52  virtual void SetText(aura::Window* window,
53                       const base::string16& tooltip_text,
54                       const gfx::Point& location) OVERRIDE;
55  virtual void Show() OVERRIDE;
56  virtual void Hide() OVERRIDE;
57  virtual bool IsVisible() OVERRIDE;
58
59  // WidgetObserver:
60  virtual void OnWidgetDestroying(Widget* widget) OVERRIDE;
61
62  const gfx::ScreenType screen_type_;
63
64  // The label showing the tooltip.
65  Label label_;
66
67  // The widget containing the tooltip. May be NULL.
68  Widget* widget_;
69
70  // The window we're showing the tooltip for. Never NULL and valid while
71  // showing.
72  aura::Window* tooltip_window_;
73
74  DISALLOW_COPY_AND_ASSIGN(TooltipAura);
75};
76
77}  // namespace corewm
78}  // namespace views
79
80#endif  // UI_VIEWS_COREWM_TOOLTIP_AURA_H_
81