chrome/browser/chromeos/drop_shadow_label.cc

   1 // Copyright (c) 2011 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 "base/utf_string_conversions.h"
   8 #include "ui/gfx/canvas.h"
   9 #include "ui/gfx/color_utils.h"
  10
  11 using views::Label;
  12
  13 namespace chromeos {
  14
  15 static const int kDefaultDropShadowSize = 2;
  16
  17 DropShadowLabel::DropShadowLabel() : drop_shadow_size_(kDefaultDropShadowSize) {
  18 }
  19
  20 void DropShadowLabel::SetDropShadowSize(int drop_shadow_size) {
  21   if (drop_shadow_size != drop_shadow_size_) {
  22     drop_shadow_size_ = drop_shadow_size;
  23     invalidate_text_size();
  24     SchedulePaint();
  25   }
  26 }
  27
  28 void DropShadowLabel::PaintText(gfx::Canvas* canvas,
  29                                 const string16& text,
  30                                 const gfx::Rect& text_bounds,
  31                                 int flags) {
  32   SkColor text_color = enabled() ? enabled_color() : disabled_color();
  33   if (drop_shadow_size_ > 0) {
  34     const float kShadowOpacity = 0.2;
  35     const SkColor shadow_color =
  36         SkColorSetA(SK_ColorBLACK, kShadowOpacity * SkColorGetA(text_color));
  37     for (int i = 0; i < drop_shadow_size_; i++) {
  38       canvas->DrawStringInt(text, font(), shadow_color,
  39                             text_bounds.x() + i, text_bounds.y(),
  40                             text_bounds.width(), text_bounds.height(), flags);
  41       canvas->DrawStringInt(text, font(), shadow_color,
  42                             text_bounds.x() + i, text_bounds.y() + i,
  43                             text_bounds.width(), text_bounds.height(), flags);
  44       canvas->DrawStringInt(text, font(), shadow_color,
  45                             text_bounds.x(), text_bounds.y() + i,
  46                             text_bounds.width(), text_bounds.height(), flags);
  47     }
  48   }
  49
  50   canvas->DrawStringInt(text, font(), text_color, text_bounds.x(),
  51       text_bounds.y(), text_bounds.width(), text_bounds.height(), flags);
  52
  53   if (HasFocus() || paint_as_focused()) {
  54     gfx::Rect focus_bounds = text_bounds;
  55     focus_bounds.Inset(-Label::kFocusBorderPadding,
  56                        -Label::kFocusBorderPadding);
  57     canvas->DrawFocusRect(focus_bounds);
  58   }
  59 }
  60
  61 gfx::Size DropShadowLabel::GetTextSize() const {
  62   gfx::Size text_size = Label::GetTextSize();
  63   text_size.SetSize(text_size.width() + drop_shadow_size_,
  64                     text_size.height() + drop_shadow_size_);
  65   return text_size;
  66 }
  67
  68 }  // namespace chromeos