aura: brightness and volume bubble.

chrome/browser/chromeos/setting_level_bubble_view_views.cc

+// Copyright (c) 2011 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/setting_level_bubble_view_views.h"
+
+#include <algorithm>
+
+#include "chrome/browser/chromeos/login/background_view.h"
+#include "chrome/browser/chromeos/login/login_utils.h"
+#include "chrome/browser/chromeos/login/webui_login_display.h"
+#include "chrome/browser/chromeos/setting_level_bubble_view.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/views/bubble/bubble.h"  // for kBackgroundColor
+#include "ui/gfx/screen.h"
+#include "views/widget/root_view.h"
+
+using base::TimeDelta;
+using base::TimeTicks;
+using std::max;
+using std::min;
+
+namespace {
+
+// How long should the bubble be shown onscreen whenever the setting changes?
+const int kBubbleShowTimeoutMs = 1000;
+
+// How long should the level initially take to move up or down when it changes?
+// (The rate adapts to handle keyboard autorepeat.)
+const int64 kInitialAnimationDurationMs = 200;
+
+// Horizontal position of the center of the bubble on the screen: 0 is left
+// edge, 0.5 is center, 1 is right edge.
+const double kBubbleXRatio = 0.5;
+
+// Vertical gap from the bottom of the screen in pixels.
+const int kBubbleBottomGap = 30;
+
+// Duration between animation frames.
+// Chosen to match ui::SlideAnimation's kDefaultFramerateHz.
+const int kAnimationIntervalMs = 1000 / 50;
+
+double LimitPercent(double percent) {
+  return min(max(percent, 0.0), 100.0);
+}
+
+}  // namespace
+
+namespace chromeos {
+
+// Temporary helper routine. Tries to first return the widget from the
+// most-recently-focused normal browser window, then from a login
+// background, and finally NULL if both of those fail.
+// TODO(glotov): remove this in favor of enabling Bubble class act
+// without |parent| specified. crosbug.com/4025
+static views::Widget* GetToplevelWidget() {
+#if defined(USE_AURA)
+  // TODO(saintlou): Need to fix in PureViews..... how?
+  return WebUILoginDisplay::GetLoginWindow();
+#else
+  GtkWindow* window = NULL;
+
+  // We just use the default profile here -- this gets overridden as needed
+  // in Chrome OS depending on whether the user is logged in or not.
+  Browser* browser =
+      BrowserList::FindTabbedBrowser(
+          ProfileManager::GetDefaultProfile(),
+          true);  // match_incognito
+  if (browser) {
+    window = GTK_WINDOW(browser->window()->GetNativeHandle());
+  } else {
+    // Otherwise, see if there's a background window that we can use.
+    BackgroundView* background = LoginUtils::Get()->GetBackgroundView();
+    if (background)
+      window = GTK_WINDOW(background->GetNativeWindow());
+  }
+
+  if (window)
+    return views::Widget::GetWidgetForNativeWindow(window);
+  else
+    return WebUILoginDisplay::GetLoginWindow();
+#endif
+}
+
+// SettingLevelBubbleViewViews -------------------------------------------------
+// static
+views::Widget* SettingLevelBubbleViewViews::ConstructSettingLevelBubble(
+    SkBitmap* increase_icon,
+    SkBitmap* decrease_icon,
+    SkBitmap* zero_icon,
+    double percent,
+    bool enabled) {
+  views::Widget* parent = GetToplevelWidget();
+  SettingLevelBubbleViewViews* delegate =
+      new SettingLevelBubbleViewViews(increase_icon, decrease_icon, zero_icon);
+  delegate->UpdateSettingLevel(percent, enabled);
+  // Construct and initialize settings.
+  return views::BubbleDelegateView::ConstructBubble(delegate, parent);
+}
+
+SettingLevelBubbleViewViews::SettingLevelBubbleViewViews(
+    SkBitmap* increase_icon,
+    SkBitmap* decrease_icon,
+    SkBitmap* disabled_icon)
+    : current_percent_(-1.0),
+      target_percent_(-1.0),
+      increase_icon_(increase_icon),
+      decrease_icon_(decrease_icon),
+      disabled_icon_(disabled_icon),
+      current_icon_(NULL),
+      enabled_(false),
+      view_(NULL),
+      is_animating_(false) {
+}
+
+SettingLevelBubbleViewViews::~SettingLevelBubbleViewViews() {
+  WindowClosing();
+}
+
+void SettingLevelBubbleViewViews::Init() {
+  SettingLevelBubbleView* view = new SettingLevelBubbleView();
+  view->SetIcon(current_icon_);
+  view->SetEnabled(enabled_);
+
+  // Calculate the position in screen coordinates that the bubble should
+  // "point" at (since we use BubbleBorder::FLOAT, this position actually
+  // specifies the center of the bubble).
+  const gfx::Rect monitor_area =
+      gfx::Screen::GetMonitorAreaNearestWindow(
+          GetWidget()->GetTopLevelWidget()->GetNativeView());
+  const gfx::Size view_size = view->GetPreferredSize();
+  position_relative_to_ = gfx::Rect(
+      monitor_area.x() + kBubbleXRatio * monitor_area.width(),
+      monitor_area.bottom() - view_size.height() / 2 - kBubbleBottomGap,
+      0, 0);
+  view->Init(current_icon_, current_percent_, enabled_);
+  AddChildView(view);
+}
+
+views::BubbleBorder::ArrowLocation
+SettingLevelBubbleViewViews::GetArrowLocation() const {
+  return views::BubbleBorder::FLOAT;
+}
+
+SkColor SettingLevelBubbleViewViews::GetColor() const {
+  return Bubble::kBackgroundColor;
+}
+
+bool SettingLevelBubbleViewViews::GetEnableAccelerator() const {
+  return false;
+}
+
+void SettingLevelBubbleViewViews::WindowClosing() {
+  StopAnimation();
+  current_percent_ = target_percent_;
+  target_time_ = TimeTicks();
+  last_animation_update_time_ = TimeTicks();
+  last_target_update_time_ = TimeTicks();
+}
+
+void SettingLevelBubbleViewViews::UpdateSettingLevel(double percent,
+                                                     bool enabled) {
+  enabled_ = enabled;
+  const double old_target_percent = target_percent_;
+  UpdateTargetPercent(percent);
+  current_icon_ = increase_icon_;
+  if (!enabled || target_percent_ == 0)
+    current_icon_ = disabled_icon_;
+  else if (old_target_percent >= 0 && target_percent_ < old_target_percent)
+    current_icon_ = decrease_icon_;
+}
+
+void SettingLevelBubbleViewViews::UpdateWithoutShowingBubble(
+    double percent,
+    bool enabled) {
+  UpdateTargetPercent(percent);
+  if (view_)
+    view_->SetEnabled(enabled);
+}
+
+void SettingLevelBubbleViewViews::StartHideTimer() {
+  hide_timer_.Stop();
+    hide_timer_.Start(FROM_HERE,
+                      base::TimeDelta::FromMilliseconds(kBubbleShowTimeoutMs),
+                      this, &SettingLevelBubbleViewViews::OnHideTimeout);
+}
+
+void SettingLevelBubbleViewViews::OnHideTimeout() {
+  GetWidget()->Close();
+}
+
+void SettingLevelBubbleViewViews::OnAnimationTimeout() {
+  const TimeTicks now = TimeTicks::Now();
+  const int64 remaining_ms = (target_time_ - now).InMilliseconds();
+
+  if (remaining_ms <= 0) {
+    current_percent_ = target_percent_;
+    StopAnimation();
+  } else {
+    // Figure out what fraction of the total time until we want to reach the
+    // target has elapsed since the last update.
+    const double remaining_percent = target_percent_ - current_percent_;
+    const int64 elapsed_ms =
+        (now - last_animation_update_time_).InMilliseconds();
+    current_percent_ +=
+        remaining_percent *
+        (static_cast<double>(elapsed_ms) / (elapsed_ms + remaining_ms));
+  }
+  last_animation_update_time_ = now;
+
+  if (view_)
+    view_->SetLevel(current_percent_);
+}
+
+
+void SettingLevelBubbleViewViews::UpdateTargetPercent(double percent) {
+  target_percent_ = LimitPercent(percent);
+  const TimeTicks now = TimeTicks::Now();
+
+  if (current_percent_ < 0.0) {
+    // If we're setting the level for the first time, no need to animate.
+    current_percent_ = target_percent_;
+    if (view_)
+      view_->SetLevel(current_percent_);
+  } else {
+    // Use the time since the last request as a hint for the duration of the
+    // animation.  This makes us automatically adapt to the repeat rate if a key
+    // is being held down to change a setting (which prevents us from lagging
+    // behind when the key is finally released).
+    int64 duration_ms = kInitialAnimationDurationMs;
+    if (!last_target_update_time_.is_null())
+      duration_ms = min(kInitialAnimationDurationMs,
+                        (now - last_target_update_time_).InMilliseconds());
+    target_time_ = now + TimeDelta::FromMilliseconds(duration_ms);
+
+    if (!is_animating_) {
+      animation_timer_.Start(FROM_HERE,
+                             TimeDelta::FromMilliseconds(kAnimationIntervalMs),
+                             this,
+                             &SettingLevelBubbleViewViews::OnAnimationTimeout);
+      is_animating_ = true;
+      last_animation_update_time_ = now;
+    }
+  }
+
+  last_target_update_time_ = now;
+}
+
+void SettingLevelBubbleViewViews::StopAnimation() {
+  animation_timer_.Stop();
+  is_animating_ = false;
+}
+
+}  // namespace chromeos