1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
// 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 UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WRAPPER_H_
#define UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WRAPPER_H_
#include "ui/views/views_export.h"
namespace ui {
class NativeTheme;
}
namespace views {
class NativeScrollBar;
class View;
// A specialization of NativeControlWrapper that hosts a platform-native
// scroll bar.
class VIEWS_EXPORT NativeScrollBarWrapper {
public:
virtual ~NativeScrollBarWrapper() {}
// Updates the scroll bar appearance given a viewport size, content size and
// current position.
virtual void Update(int viewport_size, int content_size, int current_pos) = 0;
// Retrieves the views::View that hosts the native control.
virtual View* GetView() = 0;
// Returns the position of the scrollbar.
virtual int GetPosition() const = 0;
// Creates an appropriate NativeScrollBarWrapper for the platform.
static NativeScrollBarWrapper* CreateWrapper(NativeScrollBar* button);
// Returns the system sizes of vertical/horizontal scroll bars.
static int GetVerticalScrollBarWidth(const ui::NativeTheme* theme);
static int GetHorizontalScrollBarHeight(const ui::NativeTheme* theme);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WRAPPER_H_
|
