Home | History | Annotate | Download | only in views 
      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 #ifndef CHROME_BROWSER_UI_VIEWS_THEME_INSTALL_BUBBLE_VIEW_H_
      6 #define CHROME_BROWSER_UI_VIEWS_THEME_INSTALL_BUBBLE_VIEW_H_
      7 #pragma once
      8 
      9 #include "base/string16.h"
     10 #include "content/common/notification_observer.h"
     11 #include "content/common/notification_registrar.h"
     12 #include "ui/gfx/canvas.h"
     13 #include "views/controls/label.h"
     14 
     15 class TabContents;
     16 
     17 namespace views {
     18 class Widget;
     19 }
     20 
     21 // ThemeInstallBubbleView is a view that provides a "Loading..." bubble in the
     22 // center of a browser window for use when an extension or theme is loaded.
     23 // (The Browser class only calls it to install itself into the currently active
     24 // browser window.)  If an extension is being applied, the bubble goes away
     25 // immediately.  If a theme is being applied, it disappears when the theme has
     26 // been loaded.  The purpose of this bubble is to warn the user that the browser
     27 // may be unresponsive while the theme is being installed.
     28 //
     29 // Edge case: note that if one installs a theme in one window and then switches
     30 // rapidly to another window to install a theme there as well (in the short time
     31 // between install begin and theme caching seizing the UI thread), the loading
     32 // bubble will only appear over the first window, as there is only ever one
     33 // instance of the bubble.
     34 class ThemeInstallBubbleView : public NotificationObserver,
     35                                public views::Label {
     36  public:
     37   virtual ~ThemeInstallBubbleView();
     38 
     39   // NotificationObserver
     40   virtual void Observe(NotificationType type,
     41                        const NotificationSource& source,
     42                        const NotificationDetails& details);
     43 
     44   // Show the loading bubble.
     45   static void Show(TabContents* tab_contents);
     46 
     47  private:
     48   explicit ThemeInstallBubbleView(TabContents* tab_contents);
     49 
     50   // Put the popup in the correct place on the tab.
     51   void Reposition();
     52 
     53   // Inherited from views.
     54   virtual gfx::Size GetPreferredSize();
     55 
     56   // Shut down the popup and remove our notifications.
     57   void Close();
     58 
     59   virtual void OnPaint(gfx::Canvas* canvas);
     60 
     61   // The content area at the start of the animation.
     62   gfx::Rect tab_contents_bounds_;
     63 
     64   // Widget containing us.
     65   views::Widget* popup_;
     66 
     67   // Text to show warning that theme is being installed.
     68   string16 text_;
     69 
     70   // A scoped container for notification registries.
     71   NotificationRegistrar registrar_;
     72 
     73   DISALLOW_COPY_AND_ASSIGN(ThemeInstallBubbleView);
     74 };
     75 
     76 #endif  // CHROME_BROWSER_UI_VIEWS_THEME_INSTALL_BUBBLE_VIEW_H_
     77