GTK: reduce cpu usage of upgrade notification animation.

chrome/browser/gtk/browser_toolbar_gtk.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_GTK_BROWSER_TOOLBAR_GTK_H_
 #define CHROME_BROWSER_GTK_BROWSER_TOOLBAR_GTK_H_
 
 #include <gtk/gtk.h>
 #include <string>
 
+#include "app/active_window_watcher_x.h"
 #include "app/gtk_signal.h"
 #include "app/menus/simple_menu_model.h"
 #include "app/throb_animation.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/app_menu_model.h"
 #include "chrome/browser/command_updater.h"
 #include "chrome/browser/gtk/custom_button.h"
 #include "chrome/browser/gtk/menu_bar_helper.h"
 #include "chrome/browser/gtk/menu_gtk.h"
 #include "chrome/browser/page_menu_model.h"
@@ skipping 16 matching lines @@
 class TabContents;
 class ToolbarModel;
 
 // View class that displays the GTK version of the toolbar and routes gtk
 // events back to the Browser.
 class BrowserToolbarGtk : public CommandUpdater::CommandObserver,
                           public menus::SimpleMenuModel::Delegate,
                           public MenuGtk::Delegate,
                           public NotificationObserver,
                           public MenuBarHelper::Delegate,
-                          public AnimationDelegate {
+                          public AnimationDelegate,
+                          public ActiveWindowWatcherX::Observer {
  public:
   explicit BrowserToolbarGtk(Browser* browser, BrowserWindowGtk* window);
   virtual ~BrowserToolbarGtk();
 
   // Create the contents of the toolbar. |top_level_window| is the GtkWindow
   // to which we attach our accelerators.
   void Init(Profile* profile, GtkWindow* top_level_window);
 
   // Set the various widgets' ViewIDs.
   void SetViewIDs();
@@ skipping 61 matching lines @@
   // MenuBarHelper::Delegate implementation ------------------------------------
   virtual void PopupForButton(GtkWidget* button);
   virtual void PopupForButtonNextTo(GtkWidget* button,
                                     GtkMenuDirectionType dir);
 
   // AnimationDelegate implementation ------------------------------------------
   virtual void AnimationEnded(const Animation* animation);
   virtual void AnimationProgressed(const Animation* animation);
   virtual void AnimationCanceled(const Animation* animation);
 
+  // ActiveWindowWatcher::Observer implementation ------------------------------
+  virtual void ActiveWindowChanged(GdkWindow* active_window);
+
  private:
   // Builds a toolbar button with all the properties set.
   // |spacing| is the width of padding (in pixels) on the left and right of the
   // button.
   CustomDrawButton* BuildToolbarButton(int normal_id,
                                        int active_id,
                                        int highlight_id,
                                        int depressed_id,
                                        int background_id,
                                        const std::string& localized_tooltip,
@@ skipping 10 matching lines @@
 
   // Helper for the PageAppMenu event handlers. Pops down the currently active
   // meun and pops up the other menu.
   void ChangeActiveMenu(GtkWidget* active_menu, guint timestamp);
 
   // Sets the top corners of the toolbar to rounded, or sets them to normal,
   // depending on the state of the browser window. Returns false if no action
   // was taken (the roundedness was already correct), true otherwise.
   bool UpdateRoundedness();
 
+  // Calculates whether the upgrade notification dot should be faded at all
+  // (as opposed to solid).
+  bool UpgradeAnimationIsFaded();
+
   // Gtk callback for the "expose-event" signal.
   // The alignment contains the toolbar.
   CHROMEGTK_CALLBACK_1(BrowserToolbarGtk, gboolean, OnAlignmentExpose,
                        GdkEventExpose*);
   CHROMEGTK_CALLBACK_1(BrowserToolbarGtk, gboolean, OnLocationHboxExpose,
                        GdkEventExpose*);
 
   // Gtk callback for the "clicked" signal.
   CHROMEGTK_CALLBACK_0(BrowserToolbarGtk, void, OnButtonClick);
 
   // Gtk callback to intercept mouse clicks to the menu buttons.
   CHROMEGTK_CALLBACK_1(BrowserToolbarGtk, gboolean, OnMenuButtonPressEvent,
                        GdkEventButton*);
 
   // Used for drags onto home button.
   CHROMEGTK_CALLBACK_6(BrowserToolbarGtk, void, OnDragDataReceived,
                        GdkDragContext*, gint, gint, GtkSelectionData*,
                        guint, guint);
 
   // Used to stop the upgrade notification animation.
   CHROMEGTK_CALLBACK_0(BrowserToolbarGtk, void, OnAppMenuShow);
 
   // Used to draw the upgrade notification badge.
   CHROMEGTK_CALLBACK_1(BrowserToolbarGtk, gboolean, OnAppMenuImageExpose,
                        GdkEventExpose*);
 
   // Updates preference-dependent state.
   void NotifyPrefChanged(const std::wstring* pref);
 
-  // Start the upgrade notification animation.
-  void ShowUpgradeReminder();
+  // Start the upgrade notification animation if we have detected an upgrade
+  // and the current toolbar is focused.
+  void MaybeShowUpgradeReminder();
 
   static void SetSyncMenuLabel(GtkWidget* widget, gpointer userdata);
 
   // Sometimes we only want to show the location w/o the toolbar buttons (e.g.,
   // in a popup window).
   bool ShouldOnlyShowLocation() const;
 
   // An event box that holds |toolbar_|. We need the toolbar to have its own
   // GdkWindow when we use the GTK drawing because otherwise the color from our
   // parent GdkWindow will leak through with some theme engines (such as
@@ skipping 61 matching lines @@
   // rendering.
   OwnedWidgetGtk offscreen_entry_;
 
   MenuBarHelper menu_bar_helper_;
 
   // Manages the home button drop signal handler.
   scoped_ptr<GtkSignalRegistrar> drop_handler_;
 
   ThrobAnimation upgrade_reminder_animation_;
 
+  // We have already shown and dismissed the upgrade reminder animation.
+  bool upgrade_reminder_canceled_;
+
   // When collapsed, the toolbar is just a tiny strip, no controls are visible.
   bool collapsed_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserToolbarGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_BROWSER_TOOLBAR_GTK_H_