chromium/ui/views/animation/widget_fade_animator.h

// Copyright 2021 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_VIEWS_ANIMATION_WIDGET_FADE_ANIMATOR_H_
#define UI_VIEWS_ANIMATION_WIDGET_FADE_ANIMATOR_H_

#include "base/callback_list.h"
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/scoped_observation.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "ui/gfx/animation/linear_animation.h"
#include "ui/gfx/animation/tween.h"
#include "ui/views/animation/animation_delegate_views.h"
#include "ui/views/views_export.h"
#include "ui/views/widget/widget.h"
#include "ui/views/widget/widget_observer.h"

namespace views {

class Widget;

// Animates a widget's opacity between fully hidden and fully shown, providing
// a fade-in/fade-out effect.
class VIEWS_EXPORT WidgetFadeAnimator : public AnimationDelegateViews,
                                        public WidgetObserver { … };

}  // namespace views

#endif  // UI_VIEWS_ANIMATION_WIDGET_FADE_ANIMATOR_H_