drop_shadow_label.cc revision c407dc5cd9bdc5668497f21b26b09d988ab439de 
1// Copyright (c) 2010 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#include "chrome/browser/chromeos/drop_shadow_label.h"
6
7#include "gfx/canvas.h"
8#include "gfx/color_utils.h"
9
10using views::Label;
11
12namespace chromeos {
13
14static const int kDefaultDropShadowSize = 2;
15
16// Default color is black.
17static const SkColor kDefaultColor = 0x000000;
18
19static const float kShadowOpacity = 0.2;
20
21DropShadowLabel::DropShadowLabel() : Label() {
22  Init();
23}
24
25void DropShadowLabel::Init() {
26  drop_shadow_size_ = kDefaultDropShadowSize;
27}
28
29void DropShadowLabel::SetDropShadowSize(int drop_shadow_size) {
30  if (drop_shadow_size != drop_shadow_size_) {
31    drop_shadow_size_ = drop_shadow_size;
32    invalidate_text_size();
33    SchedulePaint();
34  }
35}
36
37void DropShadowLabel::PaintText(gfx::Canvas* canvas,
38                                const std::wstring& text,
39                                const gfx::Rect& text_bounds,
40                                int flags) {
41  if (drop_shadow_size_ > 0) {
42    SkColor color = SkColorSetARGB(kShadowOpacity * SkColorGetA(GetColor()),
43                                   SkColorGetR(kDefaultColor),
44                                   SkColorGetG(kDefaultColor),
45                                   SkColorGetB(kDefaultColor));
46    for (int i = 0; i < drop_shadow_size_; i++) {
47      canvas->DrawStringInt(text, font(), color,
48                            text_bounds.x() + i, text_bounds.y(),
49                            text_bounds.width(), text_bounds.height(), flags);
50      canvas->DrawStringInt(text, font(), color,
51                            text_bounds.x() + i, text_bounds.y() + i,
52                            text_bounds.width(), text_bounds.height(), flags);
53      canvas->DrawStringInt(text, font(), color,
54                            text_bounds.x(), text_bounds.y() + i,
55                            text_bounds.width(), text_bounds.height(), flags);
56    }
57  }
58
59  canvas->DrawStringInt(text, font(), GetColor(),
60                        text_bounds.x(), text_bounds.y(),
61                        text_bounds.width(), text_bounds.height(), flags);
62
63  if (HasFocus() || paint_as_focused()) {
64    gfx::Rect focus_bounds = text_bounds;
65    focus_bounds.Inset(-Label::kFocusBorderPadding,
66                       -Label::kFocusBorderPadding);
67    canvas->DrawFocusRect(focus_bounds.x(), focus_bounds.y(),
68                          focus_bounds.width(), focus_bounds.height());
69  }
70}
71
72gfx::Size DropShadowLabel::GetTextSize() const {
73  gfx::Size text_size = Label::GetTextSize();
74  text_size.SetSize(text_size.width() + drop_shadow_size_,
75                    text_size.height() + drop_shadow_size_);
76  return text_size;
77}
78
79}  // namespace chromeos
80