Add "loading..." message to theme install to counter jank.

BUG= http://crbug.com/17696
TEST= Install a theme.  Note that a "loading" message appears to notify you that a theme is loading.

Review URL: http://codereview.chromium.org/191011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25383 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 67 insertions, 0 deletions

diff --git a/chrome/browser/views/theme_install_bubble_view.h b/chrome/browser/views/theme_install_bubble_view.h
new file mode 100644
index 0000000..3ac742f
--- /dev/null
+++ b/chrome/browser/views/theme_install_bubble_view.h
@@ -0,0 +1,67 @@
+// Copyright (c) 2009 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 "app/gfx/canvas.h"
+#include "chrome/browser/tab_contents/tab_contents.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/notification_service.h"
+#include "views/controls/label.h"
+#include "views/widget/widget_win.h"
+
+// ThemeInstallBubbleView launches a "loading..." bubble in the center of the
+// currently active browser window when an extension or theme is loaded.  If
+// an extension is being applied, the bubble goes away immediately.  If a theme
+// is being applied, it disappears when the theme has been loaded.  The purpose
+// of this bubble is to warn the user that the browser may be unresponsive
+// while the theme is being installed.
+//
+// Edge case: note that if one installs a theme in one window and then switches
+// rapidly to another window to install a theme there as well (in the short
+// time between install begin and theme caching seizing the UI thread), the
+// loading bubble will only appear over the first window.
+class ThemeInstallBubbleView : public NotificationObserver,
+                               public views::Label {
+ public:
+  explicit ThemeInstallBubbleView(TabContents* tab_contents);
+
+  ~ThemeInstallBubbleView();
+
+  // NotificationObserver
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  // Show the loading bubble.
+  static void Show(TabContents* tab_contents);
+
+ private:
+  // The roundedness of the edges of our bubble.
+  static const int kBubbleCornerRadius = 4;
+
+  // The content area at the start of the animation.
+  gfx::Rect tab_contents_bounds_;
+
+  // We use a HWND for the popup so that it may float above any HWNDs in our UI.
+  views::WidgetWin* popup_;
+
+  // Text to show warning that theme is being installed.
+  std::wstring text_;
+
+  // A scoped container for notification registries.
+  NotificationRegistrar registrar_;
+
+  // Put the popup in the correct place on the tab.
+  void Reposition();
+
+  // Inherited from views.
+  gfx::Size GetPreferredSize();
+
+  // Shut down the popup and remove our notifications.
+  void Close();
+
+  virtual void Paint(gfx::Canvas* canvas);
+
+  DISALLOW_COPY_AND_ASSIGN(ThemeInstallBubbleView);
+};
+