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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* Copyright (c) 2008, 2009, 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 FramelessScrollView_h
#define FramelessScrollView_h
#include "ScrollView.h"
namespace WebCore {
class FramelessScrollViewClient;
class PlatformKeyboardEvent;
class PlatformMouseEvent;
class PlatformWheelEvent;
// A FramelessScrollView is a ScrollView that can be used to render custom
// content, which does not have an associated Frame.
//
// NOTE: It may be better to just develop a custom subclass of Widget that
// can have scroll bars for this instead of trying to reuse ScrollView.
//
class FramelessScrollView : public ScrollView {
public:
FramelessScrollView() : m_client(0) {}
~FramelessScrollView();
FramelessScrollViewClient* client() const { return m_client; }
void setClient(FramelessScrollViewClient* client) { m_client = client; }
// Event handlers that subclasses must implement.
virtual bool handleMouseDownEvent(const PlatformMouseEvent&) = 0;
virtual bool handleMouseMoveEvent(const PlatformMouseEvent&) = 0;
virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&) = 0;
virtual bool handleWheelEvent(const PlatformWheelEvent&) = 0;
virtual bool handleKeyEvent(const PlatformKeyboardEvent&) = 0;
// ScrollableArea public methods:
virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&);
virtual bool isActive() const;
// Widget public methods:
virtual void invalidateRect(const IntRect&);
// ScrollView public methods:
virtual HostWindow* hostWindow() const;
virtual IntRect windowClipRect(bool clipToContents = true) const;
protected:
// ScrollView protected methods:
virtual void paintContents(GraphicsContext*, const IntRect&);
virtual void paintScrollCorner(GraphicsContext*, const IntRect& cornerRect);
virtual void contentsResized();
virtual void visibleContentsResized();
private:
FramelessScrollViewClient* m_client;
};
} // namespace WebCore
#endif
|