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// Copyright 2016 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <memory>
#include <utility>
#include "core/frontend/emu_window.h"

struct SDL_Window;

namespace Core {
class System;
}

namespace InputCommon {
class InputSubsystem;
}

class EmuWindow_SDL2 : public Core::Frontend::EmuWindow {
public:
    explicit EmuWindow_SDL2(InputCommon::InputSubsystem* input_subsystem);
    ~EmuWindow_SDL2();

    /// Whether the window is still open, and a close request hasn't yet been sent
    bool IsOpen() const;

    /// Returns if window is shown (not minimized)
    bool IsShown() const override;

    /// Wait for the next event on the main thread.
    void WaitEvent();

    // Sets the window icon from yuzu.bmp
    void SetWindowIcon();

protected:
    /// Called by WaitEvent when a key is pressed or released.
    void OnKeyEvent(int key, u8 state);

    /// Called by WaitEvent when the mouse moves.
    void OnMouseMotion(s32 x, s32 y);

    /// Called by WaitEvent when a mouse button is pressed or released
    void OnMouseButton(u32 button, u8 state, s32 x, s32 y);

    /// Translates pixel position (0..1) to pixel positions
    std::pair<unsigned, unsigned> TouchToPixelPos(float touch_x, float touch_y) const;

    /// Called by WaitEvent when a finger starts touching the touchscreen
    void OnFingerDown(float x, float y);

    /// Called by WaitEvent when a finger moves while touching the touchscreen
    void OnFingerMotion(float x, float y);

    /// Called by WaitEvent when a finger stops touching the touchscreen
    void OnFingerUp();

    /// Called by WaitEvent when any event that may cause the window to be resized occurs
    void OnResize();

    /// Called when user passes the fullscreen parameter flag
    void Fullscreen();

    /// Called when a configuration change affects the minimal size of the window
    void OnMinimalClientAreaChangeRequest(std::pair<unsigned, unsigned> minimal_size) override;

    /// Is the window still open?
    bool is_open = true;

    /// Is the window being shown?
    bool is_shown = true;

    /// Internal SDL2 render window
    SDL_Window* render_window{};

    /// Keeps track of how often to update the title bar during gameplay
    u32 last_time = 0;

    /// Input subsystem to use with this window.
    InputCommon::InputSubsystem* input_subsystem;
};