coffee_crisis/source/common/notify.cpp

#include "notify.h"
#include <string>
#include <stdio.h>

// Constructor
Notify::Notify(SDL_Renderer *renderer, std::string bitmapFile, std::string textFile)
{
    // Inicializa variables
    this->renderer = renderer;
    bgColor = {64, 64, 64};
    waitTime = 300;

    // Crea objetos
    text = new Text(bitmapFile, textFile, renderer);
}

// Destructor
Notify::~Notify()
{
    // Libera la memoria de los objetos
    delete text;

    for (auto notification : notifications)
    {
        delete notification.sprite;
        delete notification.texture;
    }
}

// Dibuja las notificaciones por pantalla
void Notify::render()
{
    for (int i = (int)notifications.size() - 1; i >= 0; --i)
    {
        notifications.at(i).sprite->render();
    }
}

// Actualiza el estado de las notificaiones
void Notify::update()
{
    for (int i = 0; i < (int)notifications.size(); ++i)
    {
        notifications.at(i).counter++;

        // Comprueba los estados
        if (notifications.at(i).state == ns_rising)
        {
            const float step = ((float)notifications.at(i).counter / notifications.at(i).travelDist);
            const int alpha = 255 * step;

            notifications.at(i).rect.y++;
            notifications.at(i).texture->setAlpha(alpha);

            if (notifications.at(i).rect.y == notifications.at(i).y)
            {
                notifications.at(i).state = ns_stay;
                notifications.at(i).texture->setAlpha(255);
                notifications.at(i).counter = 0;
            }
        }

        else if (notifications.at(i).state == ns_stay)
        {
            if (notifications.at(i).counter == waitTime)
            {
                notifications.at(i).state = ns_vanishing;
                notifications.at(i).counter = 0;
            }
        }
        else if (notifications.at(i).state == ns_vanishing)
        {

            const float step = (notifications.at(i).counter / (float)notifications.at(i).travelDist);
            const int alpha = 255 * (1 - step);

            notifications.at(i).rect.y--;
            notifications.at(i).texture->setAlpha(alpha);

            if (notifications.at(i).rect.y == notifications.at(i).y - notifications.at(i).travelDist)
            {
                notifications.at(i).state = ns_finished;
            }
        }

        notifications.at(i).sprite->setRect(notifications.at(i).rect);
    }

    clearFinishedNotifications();
}

// Elimina las notificaciones finalizadas
void Notify::clearFinishedNotifications()
{
    for (int i = (int)notifications.size() - 1; i >= 0; --i)
    {
        if (notifications.at(i).state == ns_finished)
        {
            delete notifications.at(i).sprite;
            delete notifications.at(i).texture;
            notifications.erase(notifications.begin() + i);
        }
    }
}

// Muestra una notificación de texto por pantalla;
void Notify::showText(std::string text)
{
    // Crea constantes
    const int width = this->text->lenght(text) + (this->text->getCharacterSize() * 2);
    const int height = this->text->getCharacterSize() * 2;
    const int despH = this->text->getCharacterSize() / 2;
    const int despV = despH;
    const int travelDist = height + despV;
    // const int offset = (int)notifications.size() * (travelDist) + despV;
    const int offset = (int)notifications.size() > 0 ? notifications.back().y + travelDist : despV;

    // Crea la notificacion
    notification_t n;

    // inicializa variables
    n.y = offset;
    n.travelDist = travelDist;
    n.counter = 0;
    n.state = ns_rising;
    n.text = text;
    n.rect = {despH, offset - travelDist, width, height};

    // Crea la textura
    n.texture = new Texture(renderer);
    n.texture->createBlank(renderer, width, height, SDL_TEXTUREACCESS_TARGET);
    n.texture->setAsRenderTarget(renderer);
    SDL_SetRenderDrawColor(renderer, bgColor.r, bgColor.g, bgColor.b, 255);
    SDL_RenderClear(renderer);
    n.texture->setBlendMode(SDL_BLENDMODE_BLEND);
    this->text->writeDX(TXT_CENTER | TXT_STROKE, width / 2, despV, text, 1, {255, 255, 255}, 1, {0, 0, 0});

    // Crea el sprite
    n.sprite = new Sprite(n.rect, n.texture, renderer);

    // Añade la notificación a la lista
    notifications.push_back(n);
}

// Indica si hay notificaciones activas
bool Notify::active()
{
    if ((int)notifications.size() > 0)
    {
        return true;
    }
    
    return false;
}