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// Copyright 2020 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <chrono>
#include <memory>
#include <QWidget>
namespace Loader {
class AppLoader;
}
namespace Ui {
class LoadingScreen;
}
namespace VideoCore {
enum class LoadCallbackStage;
}
class QGraphicsOpacityEffect;
class QPropertyAnimation;
class LoadingScreen : public QWidget {
Q_OBJECT
public:
explicit LoadingScreen(QWidget* parent = nullptr);
~LoadingScreen();
/// Call before showing the loading screen to load the widgets with the logo and banner for the
/// currently loaded application.
void Prepare(Loader::AppLoader& loader);
/// After the loading screen is hidden, the owner of this class can call this to clean up any
/// used resources such as the logo and banner.
void Clear();
/// Slot used to update the status of the progress bar
void OnLoadProgress(VideoCore::LoadCallbackStage stage, std::size_t value, std::size_t total);
/// Hides the LoadingScreen with a fade out effect
void OnLoadComplete();
// In order to use a custom widget with a stylesheet, you need to override the paintEvent
// See https://wiki.qt.io/How_to_Change_the_Background_Color_of_QWidget
void paintEvent(QPaintEvent* event) override;
signals:
void LoadProgress(VideoCore::LoadCallbackStage stage, std::size_t value, std::size_t total);
/// Signals that this widget is completely hidden now and should be replaced with the other
/// widget
void Hidden();
private:
std::unique_ptr<Ui::LoadingScreen> ui;
std::size_t previous_total = 0;
VideoCore::LoadCallbackStage previous_stage;
QGraphicsOpacityEffect* opacity_effect = nullptr;
std::unique_ptr<QPropertyAnimation> fadeout_animation;
// Variables used to keep track of the current ETA.
// If the rolling_average * shaders_remaining > eta_break_point then we want to display the eta.
// We don't want to always display it since showing an ETA leads people to think its taking
// longer that it is because ETAs are often wrong
static constexpr std::chrono::seconds ETABreakPoint = std::chrono::seconds{10};
static constexpr std::size_t NumberOfDataPoints = 25;
std::chrono::high_resolution_clock::time_point previous_time;
std::chrono::duration<double> rolling_average = {};
bool eta_shown = false;
};
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