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-rw-r--r--views/controls/scrollbar/base_scroll_bar_thumb.h82
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diff --git a/views/controls/scrollbar/base_scroll_bar_thumb.h b/views/controls/scrollbar/base_scroll_bar_thumb.h
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--- a/views/controls/scrollbar/base_scroll_bar_thumb.h
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-// 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_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_
-#define VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_
-#pragma once
-
-#include "ui/gfx/size.h"
-#include "views/controls/button/custom_button.h"
-#include "views/controls/scrollbar/scroll_bar.h"
-#include "views/view.h"
-
-namespace gfx {
-class Canvas;
-}
-
-namespace views {
-
-class BaseScrollBar;
-
-///////////////////////////////////////////////////////////////////////////////
-//
-// BaseScrollBarThumb
-//
-// A view that acts as the thumb in the scroll bar track that the user can
-// drag to scroll the associated contents view within the viewport.
-//
-///////////////////////////////////////////////////////////////////////////////
-class VIEWS_EXPORT BaseScrollBarThumb : public View {
- public:
- explicit BaseScrollBarThumb(BaseScrollBar* scroll_bar);
- virtual ~BaseScrollBarThumb();
-
- // Sets the size (width or height) of the thumb to the specified value.
- void SetSize(int size);
-
- // Retrieves the size (width or height) of the thumb.
- int GetSize() const;
-
- // Sets the position of the thumb on the x or y axis.
- void SetPosition(int position);
-
- // Gets the position of the thumb on the x or y axis.
- int GetPosition() const;
-
- // View overrides:
- virtual gfx::Size GetPreferredSize() OVERRIDE = 0;
-
- protected:
- // View overrides:
- virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE = 0;
- virtual void OnMouseEntered(const MouseEvent& event) OVERRIDE;
- virtual void OnMouseExited(const MouseEvent& event) OVERRIDE;
- virtual bool OnMousePressed(const MouseEvent& event) OVERRIDE;
- virtual bool OnMouseDragged(const MouseEvent& event) OVERRIDE;
- virtual void OnMouseReleased(const MouseEvent& event) OVERRIDE;
- virtual void OnMouseCaptureLost() OVERRIDE;
-
- CustomButton::ButtonState GetState() const;
- // Update our state and schedule a repaint when the mouse moves over us.
- void SetState(CustomButton::ButtonState state);
-
- private:
- // The BaseScrollBar that owns us.
- BaseScrollBar* scroll_bar_;
-
- int drag_start_position_;
-
- // The position of the mouse on the scroll axis relative to the top of this
- // View when the drag started.
- int mouse_offset_;
-
- // The current state of the thumb button.
- CustomButton::ButtonState state_;
-
- DISALLOW_COPY_AND_ASSIGN(BaseScrollBarThumb);
-};
-
-} // namespace views
-
-#endif // VIEWS_CONTROLS_SCROLLBAR_BASE_SCROLL_BAR_THUMB_H_