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// Copyright (c) 2012 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 UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
#define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "ui/views/controls/scrollbar/scroll_bar.h"
#include "ui/views/view.h"
namespace ui {
class NativeTheme;
}
namespace views {
class NativeScrollBarWrapper;
// The NativeScrollBar class is a scrollbar that uses platform's
// native control.
class VIEWS_EXPORT NativeScrollBar : public ScrollBar {
public:
// The scroll-bar's class name.
static const char kViewClassName[];
// Create new scrollbar, either horizontal or vertical.
explicit NativeScrollBar(bool is_horiz);
~NativeScrollBar() override;
// Return the system sizes.
static int GetHorizontalScrollBarHeight(const ui::NativeTheme* theme);
static int GetVerticalScrollBarWidth(const ui::NativeTheme* theme);
private:
friend class NativeScrollBarTest;
FRIEND_TEST_ALL_PREFIXES(NativeScrollBarTest, Scrolling);
// Overridden from View.
gfx::Size GetPreferredSize() const override;
void Layout() override;
void ViewHierarchyChanged(
const ViewHierarchyChangedDetails& details) override;
const char* GetClassName() const override;
// Overrideen from View for keyboard UI purpose.
bool OnKeyPressed(const ui::KeyEvent& event) override;
bool OnMouseWheel(const ui::MouseWheelEvent& e) override;
// Overridden from ui::EventHandler.
void OnGestureEvent(ui::GestureEvent* event) override;
// Overridden from ScrollBar.
void Update(int viewport_size, int content_size, int current_pos) override;
int GetPosition() const override;
int GetLayoutSize() const override;
// init border
NativeScrollBarWrapper* native_wrapper_;
DISALLOW_COPY_AND_ASSIGN(NativeScrollBar);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_H_
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