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48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_TRACKER_H_
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#define MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_TRACKER_H_
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#include <stdint.h>
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#include <set>
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#include "mojo/public/cpp/system/macros.h"
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#include "view_manager/cpp/view_observer.h"
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namespace mojo {
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class ViewTracker : public ViewObserver {
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public:
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using Views = std::set<View*>;
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ViewTracker();
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~ViewTracker() override;
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// Returns the set of views being observed.
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const std::set<View*>& views() const { return views_; }
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// Adds |view| to the set of Views being tracked.
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void Add(View* view);
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// Removes |view| from the set of views being tracked.
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void Remove(View* view);
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// Returns true if |view| was previously added and has not been removed or
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// deleted.
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bool Contains(View* view);
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// ViewObserver overrides:
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void OnViewDestroying(View* view) override;
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private:
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Views views_;
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MOJO_DISALLOW_COPY_AND_ASSIGN(ViewTracker);
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};
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} // namespace mojo
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#endif // MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_TRACKER_H_
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