blob: 4d2032a8eb146b755d35ade756d76ec2172f6826 (
plain)
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
|
// Copyright 2017 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.
#include "ui/views/view_tracker.h"
#include "ui/views/view.h"
namespace views {
ViewTracker::ViewTracker(View* view) : view_(nullptr) {
SetView(view);
}
ViewTracker::~ViewTracker() {
SetView(nullptr);
}
void ViewTracker::SetView(View* view) {
if (view == view_)
return;
if (view_)
view_->RemoveObserver(this);
view_ = view;
if (view_)
view_->AddObserver(this);
}
void ViewTracker::OnViewIsDeleting(View* observed_view) {
SetView(nullptr);
}
} // namespace views
|
