1 files changed, 88 insertions, 0 deletions
diff --git a/chrome/views/native_scroll_bar.h b/chrome/views/native_scroll_bar.h
new file mode 100644
index 0000000..623b531
--- /dev/null
+++ b/chrome/views/native_scroll_bar.h
@@ -0,0 +1,88 @@
+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef CHROME_VIEWS_NATIVE_SCROLLBAR_H__
+#define CHROME_VIEWS_NATIVE_SCROLLBAR_H__
+
+#include "chrome/views/scroll_bar.h"
+
+namespace ChromeViews {
+
+class HWNDView;
+class ScrollBarContainer;
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// NativeScrollBar
+//
+// A View subclass that wraps a Native Windows scrollbar control.
+//
+// A scrollbar is either horizontal or vertical.
+//
+/////////////////////////////////////////////////////////////////////////////
+class NativeScrollBar : public ScrollBar {
+ public:
+
+  // Create new scrollbar, either horizontal or vertical
+  explicit NativeScrollBar(bool is_horiz);
+  virtual ~NativeScrollBar();
+
+  // Overridden for layout purpose
+  virtual void Layout();
+  virtual void GetPreferredSize(CSize* sz);
+  virtual void DidChangeBounds(const CRect& previous, const CRect& current);
+
+  // Overridden for keyboard UI purpose
+  virtual bool OnKeyPressed(const KeyEvent& event);
+  virtual bool OnMouseWheel(const MouseWheelEvent& e);
+
+  virtual void ViewHierarchyChanged(bool is_add, View *parent, View *child);
+
+  // Overridden from ScrollBar
+  virtual void Update(int viewport_size, int content_size, int current_pos);
+  virtual int GetLayoutSize() const;
+  virtual int GetPosition() const;
+
+  // Return the system sizes
+  static int GetHorizontalScrollBarHeight();
+  static int GetVerticalScrollBarWidth();
+
+ private:
+  // The sb_view_ takes care of keeping sb_container in sync with the
+  // view hierarchy
+  HWNDView* sb_view_;
+
+  // sb_container_ is a custom hwnd that we use to wrap the real
+  // windows scrollbar. We need to do this to get the scroll events
+  // without having to do anything special in the high level hwnd.
+  ScrollBarContainer* sb_container_;
+};
+
+}
+#endif