Mode Indicator using BubbleDelegateView.

chrome/browser/chromeos/input_method/mode_indicator_view.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-#include "chrome/browser/chromeos/input_method/mode_indicator_view.h"
-
-#include "base/strings/utf_string_conversions.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/native_theme/native_theme.h"
-#include "ui/views/bubble/bubble_border.h"
-#include "ui/views/controls/label.h"
-
-namespace chromeos {
-namespace input_method {
-
-ModeIndicatorView::ModeIndicatorView()
-    : label_(NULL) {
-  Init();
-}
-
-ModeIndicatorView::~ModeIndicatorView() {}
-
-void ModeIndicatorView::SetLabelTextUtf8(const std::string& text_utf8) {
-  DCHECK(label_);
-
-  label_->SetText(UTF8ToUTF16(text_utf8));
-
-  // If Layout is not called here, the size of the view is not updated.
-  // TODO(komatsu): Investigate a proper way not to call Layout.
-  Layout();
-}
-
-namespace {
-const int kMinSize = 43;
-}  // namespace
-
-void ModeIndicatorView::Layout() {
-  DCHECK(label_);
-
-  // Resize label (simply use the preferred size).
-  label_->SizeToPreferredSize();
-  const gfx::Size label_size = label_->size();
-
-  // Calculate the view's base size to fit to the label size or the
-  // minimum size.
-  gfx::Size base_size = label_size;
-  base_size.SetToMax(gfx::Size(kMinSize, kMinSize));
-
-  // Resize view considering the insets of the border.
-  gfx::Size view_size = base_size;
-  const gfx::Insets insets = border()->GetInsets();
-  view_size.Enlarge(insets.width(), insets.height());
-  SetSize(view_size);
-
-  // Relocate label (center of the view considering the insets).
-  const int x = insets.left() + (base_size.width()  - label_size.width())  / 2;
-  const int y = insets.top()  + (base_size.height() - label_size.height()) / 2;
-  label_->SetX(x);
-  label_->SetY(y);
-}
-
-void ModeIndicatorView::Init() {
-  // Initialize view.
-  views::BubbleBorder* border = new views::BubbleBorder(
-      views::BubbleBorder::TOP_CENTER,
-      views::BubbleBorder::NO_SHADOW,
-      SK_ColorWHITE);
-  set_border(border);
-  set_background(new views::BubbleBackground(border));
-
-  // Initialize label.
-  label_ = new views::Label;
-  label_->set_border(views::Border::CreateEmptyBorder(2, 2, 2, 2));
-  label_->set_background(
-      views::Background::CreateSolidBackground(
-          GetNativeTheme()->GetSystemColor(
-              ui::NativeTheme::kColorId_WindowBackground)));
-  label_->SetBackgroundColor(label_->background()->get_color());
-
-  // Pass the ownership.
-  AddChildView(label_);
-}
-
-}  // namespace input_method
-}  // namespace chromeos