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
|
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_AURA_EXTRA_WINDOW_POSITION_IN_ROOT_MONITOR_H_
#define UI_AURA_EXTRA_WINDOW_POSITION_IN_ROOT_MONITOR_H_
#include <vector>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "ui/aura/window_observer.h"
#include "ui/aura_extra/aura_extra_export.h"
namespace aura_extra {
// WindowPositionInRootMonitor notifies a callback any time the position of a
// window, relative to the root, changes. Changes are only sent when attached
// to a valid root.
class AURA_EXTRA_EXPORT WindowPositionInRootMonitor
: public aura::WindowObserver {
public:
WindowPositionInRootMonitor(aura::Window* window,
base::RepeatingClosure callback);
WindowPositionInRootMonitor(const WindowPositionInRootMonitor&) = delete;
WindowPositionInRootMonitor& operator=(const WindowPositionInRootMonitor&) =
delete;
~WindowPositionInRootMonitor() override;
private:
// Adds |window| and all its ancestors to |ancestors_|.
void AddAncestors(aura::Window* window);
// aura::WindowObserver:
void OnWindowDestroyed(aura::Window* window) override;
void OnWindowParentChanged(aura::Window* window,
aura::Window* parent) override;
void OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds,
ui::PropertyChangeReason reason) override;
base::RepeatingClosure callback_;
// The windows being watched. This contains the window supplied to the
// constructor and all it's ancestors. This is empty if the window is deleted.
std::vector<raw_ptr<aura::Window, VectorExperimental>> ancestors_;
};
} // namespace aura_extra
#endif // UI_AURA_EXTRA_WINDOW_POSITION_IN_ROOT_MONITOR_H_
|
