Add 'preserve trailing view size' capability into the SingleSplitView....

views/controls/single_split_view.h

 // Copyright (c) 2006-2008 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_SINGLE_SPLIT_VIEW_H_
 #define VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_H_
 
 #include "views/view.h"
 
 namespace views {
 
 // SingleSplitView lays out two views horizontally. A splitter exists between
 // the two views that the user can drag around to resize the views.
 class SingleSplitView : public views::View {
  public:
   enum Orientation {
     HORIZONTAL_SPLIT,
     VERTICAL_SPLIT
   };
 
   SingleSplitView(View* leading, View* trailing, Orientation orientation);
 
+  virtual void DidChangeBounds(const gfx::Rect& previous,
+                               const gfx::Rect& current);
+
   virtual void Layout();
 
   // SingleSplitView's preferred size is the sum of the preferred widths
   // and the max of the heights.
   virtual gfx::Size GetPreferredSize();
 
   // Overriden to return a resize cursor when over the divider.
   virtual gfx::NativeCursor GetCursorForPoint(Event::EventType event_type,
                                               int x,
                                               int y);
 
   void set_divider_offset(int divider_offset) {
     divider_offset_ = divider_offset;
   }
   int divider_offset() { return divider_offset_; }
 
+  // Sets whether the leading component is resized when the split views size
+  // changes. The default is true. A value of false results in the trailing
+  // component resizing on a bounds change.
+  void set_resize_leading_on_bounds_change(bool resize) {
+    resize_leading_on_bounds_change_ = resize;
+  }
+
  protected:
   virtual bool OnMousePressed(const MouseEvent& event);
   virtual bool OnMouseDragged(const MouseEvent& event);
   virtual void OnMouseReleased(const MouseEvent& event, bool canceled);
 
  private:
   // Returns true if |x| or |y| is over the divider.
   bool IsPointInDivider(int x, int y);
 
   // Returns width in case of horizontal split and height otherwise.
@@ skipping 14 matching lines @@
   };
 
   DragInfo drag_info_;
 
   // Orientation of the split view.
   bool is_horizontal_;
 
   // Position of the divider.
   int divider_offset_;
 
+  bool resize_leading_on_bounds_change_;
+
   DISALLOW_COPY_AND_ASSIGN(SingleSplitView);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_SINGLE_SPLIT_VIEW_H_