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
|
// Copyright 2014 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_WIDGET_ROOT_VIEW_TARGETER_H_
#define UI_VIEWS_WIDGET_ROOT_VIEW_TARGETER_H_
#include "ui/views/view_targeter.h"
#include "ui/views/views_export.h"
namespace views {
namespace internal {
class RootView;
} // namespace internal
class View;
class ViewTargeterDelegate;
// A derived class of ViewTargeter that defines targeting logic for cases
// needing to access the members of RootView. For example, when determining the
// target of a gesture event, we need to know if a previous gesture has already
// established the View to which all subsequent gestures should be targeted.
class VIEWS_EXPORT RootViewTargeter : public ViewTargeter {
public:
RootViewTargeter(ViewTargeterDelegate* delegate,
internal::RootView* root_view);
~RootViewTargeter() override;
private:
// ViewTargeter:
View* FindTargetForGestureEvent(View* root,
const ui::GestureEvent& gesture) override;
ui::EventTarget* FindNextBestTargetForGestureEvent(
ui::EventTarget* previous_target,
const ui::GestureEvent& gesture) override;
// A pointer to the RootView on which |this| is installed.
internal::RootView* root_view_;
DISALLOW_COPY_AND_ASSIGN(RootViewTargeter);
};
} // namespace views
#endif // UI_VIEWS_WIDGET_ROOT_VIEW_TARGETER_H_
|
