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- // Copyright 2021 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/animation/widget_fade_animator.h"
- #include "ui/gfx/animation/linear_animation.h"
- #include "ui/views/widget/widget.h"
- namespace views {
- WidgetFadeAnimator::WidgetFadeAnimator(Widget* widget)
- : AnimationDelegateViews(widget->GetRootView()), widget_(widget) {
- widget_observation_.Observe(widget);
- }
- WidgetFadeAnimator::~WidgetFadeAnimator() = default;
- void WidgetFadeAnimator::FadeIn() {
- if (IsFadingIn())
- return;
- DCHECK(widget_);
- animation_type_ = FadeType::kFadeIn;
- fade_animation_.SetDuration(fade_in_duration_);
- // Widgets cannot be shown when visible and fully transparent.
- widget_->SetOpacity(0.01f);
- widget_->Show();
- fade_animation_.Start();
- }
- void WidgetFadeAnimator::CancelFadeIn() {
- if (!IsFadingIn())
- return;
- fade_animation_.Stop();
- animation_type_ = FadeType::kNone;
- }
- void WidgetFadeAnimator::FadeOut() {
- if (IsFadingOut() || !widget_)
- return;
- // If the widget is already hidden, then there is no current animation and
- // nothing to do. If the animation is close-on-hide, however, we should still
- // close the widget.
- if (!widget_->IsVisible()) {
- DCHECK(!IsFadingIn());
- if (close_on_hide_)
- widget_->Close();
- fade_complete_callbacks_.Notify(this, FadeType::kFadeOut);
- return;
- }
- animation_type_ = FadeType::kFadeOut;
- fade_animation_.SetDuration(fade_out_duration_);
- fade_animation_.Start();
- }
- void WidgetFadeAnimator::CancelFadeOut() {
- if (!IsFadingOut())
- return;
- fade_animation_.Stop();
- animation_type_ = FadeType::kNone;
- widget_->SetOpacity(1.0f);
- }
- base::CallbackListSubscription WidgetFadeAnimator::AddFadeCompleteCallback(
- FadeCompleteCallback callback) {
- return fade_complete_callbacks_.Add(callback);
- }
- void WidgetFadeAnimator::AnimationProgressed(const gfx::Animation* animation) {
- // Get the value of the animation with a material ease applied.
- double value =
- gfx::Tween::CalculateValue(tween_type_, animation->GetCurrentValue());
- float opacity = 0.0f;
- if (IsFadingOut())
- opacity = gfx::Tween::FloatValueBetween(value, 1.0f, 0.0f);
- else if (IsFadingIn())
- opacity = gfx::Tween::FloatValueBetween(value, 0.0f, 1.0f);
- if (IsFadingOut() && opacity == 0.0f) {
- if (close_on_hide_)
- widget_->Close();
- else
- widget_->Hide();
- } else {
- widget_->SetOpacity(opacity);
- }
- }
- void WidgetFadeAnimator::AnimationEnded(const gfx::Animation* animation) {
- const FadeType animation_type = animation_type_;
- AnimationProgressed(animation);
- animation_type_ = FadeType::kNone;
- fade_complete_callbacks_.Notify(this, animation_type);
- }
- void WidgetFadeAnimator::OnWidgetDestroying(Widget* widget) {
- widget_observation_.Reset();
- fade_animation_.End();
- animation_type_ = FadeType::kNone;
- widget_ = nullptr;
- }
- } // namespace views
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