views: Factor out ResizeAreaDelegate into its own header file.

R=sky@chromium.org

Review URL: http://codereview.chromium.org/8037010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@102727 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 34 insertions, 17 deletions

diff --git a/views/controls/resize_area.cc b/views/controls/resize_area.cc
index 951c82d..6492d11 100644
--- a/views/controls/resize_area.cc
+++ b/views/controls/resize_area.cc
@@ -7,6 +7,7 @@
 #include "base/logging.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "views/controls/resize_area_delegate.h"
 
 #if defined(OS_LINUX)
 #include "ui/gfx/gtk_util.h"
diff --git a/views/controls/resize_area.h b/views/controls/resize_area.h
index 9211229..3f06a1e 100644
--- a/views/controls/resize_area.h
+++ b/views/controls/resize_area.h
@@ -12,6 +12,8 @@
 
 namespace views {
 
+class ResizeAreaDelegate;
+
 ////////////////////////////////////////////////////////////////////////////////
 //
 // An invisible area that acts like a horizontal resizer.
@@ -19,22 +21,6 @@ namespace views {
 ////////////////////////////////////////////////////////////////////////////////
 class VIEWS_EXPORT ResizeArea : public View {
  public:
-  //////////////////////////////////////////////////////////////////////////////
-  //
-  // The interface needed for getting notified about the resize event.
-  //
-  //////////////////////////////////////////////////////////////////////////////
-  class ResizeAreaDelegate {
-   public:
-    // OnResize is sent when resizing is detected. |resize_amount| specifies the
-    // number of pixels that the user wants to resize by, and can be negative or
-    // positive (depending on direction of dragging and flips according to
-    // locale directionality: dragging to the left in LTR locales gives negative
-    // |resize_amount| but positive amount for RTL). |done_resizing| is true if
-    // the user has released the mouse.
-    virtual void OnResize(int resize_amount, bool done_resizing) = 0;
-  };
-
   static const char kViewClassName[];
 
   explicit ResizeArea(ResizeAreaDelegate* delegate);
diff --git a/views/controls/resize_area_delegate.h b/views/controls/resize_area_delegate.h
new file mode 100644
index 0000000..041495f
--- /dev/null
+++ b/views/controls/resize_area_delegate.h
@@ -0,0 +1,29 @@
+// 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.
+
+#ifndef VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_
+#define VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_
+#pragma once
+
+namespace views {
+
+// An interface implemented by objects that want to be notified about the resize
+// event.
+class ResizeAreaDelegate {
+ public:
+  // OnResize is sent when resizing is detected. |resize_amount| specifies the
+  // number of pixels that the user wants to resize by, and can be negative or
+  // positive (depending on direction of dragging and flips according to
+  // locale directionality: dragging to the left in LTR locales gives negative
+  // |resize_amount| but positive amount for RTL). |done_resizing| is true if
+  // the user has released the mouse.
+  virtual void OnResize(int resize_amount, bool done_resizing) = 0;
+
+ protected:
+  virtual ~ResizeAreaDelegate() {}
+};
+
+}  // namespace views
+
+#endif  // VIEWS_CONTROLS_RESIZE_AREA_DELEGATE_H_
diff --git a/views/views.gyp b/views/views.gyp
index 85619a3..96a2433 100644
--- a/views/views.gyp
+++ b/views/views.gyp
@@ -24,7 +24,7 @@
         'sources/': [ ['exclude', '_win\\.(h|cc)$'],
                       ['exclude', '_gtk\\.(h|cc)$'],
                       ['exclude', '_x\\.(h|cc)$'] ],
-      }],      
+      }],
     ],
   },
   'targets': [
@@ -179,6 +179,7 @@
         'controls/progress_bar.cc',
         'controls/resize_area.cc',
         'controls/resize_area.h',
+        'controls/resize_area_delegate.h',
         'controls/scroll_view.cc',
         'controls/scroll_view.h',
         'controls/scrollbar/base_scroll_bar.cc',