histogram.cpp - master - annabasalyga/Traffic_simulator

histogram.cpp
101 строка3 KB
Anna
Final version n.1
22 янв 2026, 15:55
22 янв 2026, 15:55d0e56e2
#include <iostream>
#include "histogram.h"

Histogram::Histogram() {
    if (!font.loadFromFile("font.ttf")) {
        std::cerr << "Failed to load font for histogram\n";
    }
}

void Histogram::update(const DirectedGraph& graph) {
    hasBest = false;
    hasAlt = false;

    const auto& paths = graph.getPaths();
    if (paths.empty())
        return;

    int best = graph.getBestPathIndex();
    int alt = graph.getAlternativePathIndex();

    if (best != -1) {
        bestPredCost = graph.predictPath(paths[best]);
        hasBest = true;
    }

    if (alt != -1) {
        altPredCost = graph.predictPath(paths[alt]);
        hasAlt = true;
    }
}

void Histogram::draw(sf::RenderWindow& win) {
    if (!hasBest && !hasAlt)
        return;

    sf::Vector2f panelPos(620.f, 20.f);
    sf::Vector2f panelSize(260.f, 220.f);

    float barWidth = 60.f;
    float maxBarHeight = 130.f;
    float bottomY = panelPos.y + panelSize.y - 30.f;

    double maxValue = std::max(bestPredCost, altPredCost);
    if (maxValue < 1e-6) {
        maxValue = 1.0;
    }
        
    // ���
    sf::RectangleShape panel(panelSize);
    panel.setPosition(panelPos);
    panel.setFillColor(sf::Color(255, 255, 255, 100));
    panel.setOutlineThickness(2.f);
    panel.setOutlineColor(sf::Color::Black);
    win.draw(panel);

    // ���������
    sf::Text title("Path costs", font, 30);
    title.setFillColor(sf::Color::Black);
    title.setPosition(630.f, panelPos.y + 10.f);
    win.draw(title);

    // ������ ����
    if (hasBest) {
        float h = static_cast<float>(bestPredCost) / maxValue * maxBarHeight;

        sf::RectangleShape bar({ barWidth, h });
        bar.setFillColor(sf::Color::Green);
        bar.setPosition(panelPos.x + 50.f, bottomY - h);
        win.draw(bar);

        drawLabel(win, "Best", bar.getPosition().x + 5.f, bottomY + 5.f);
        drawValue(win, bestPredCost, bar.getPosition().x, bar.getPosition().y - 20.f);
    }

    // �������������� ����
    if (hasAlt) {
        float h = static_cast<float>(altPredCost) / maxValue * maxBarHeight;

        sf::RectangleShape bar({ barWidth, h });
        bar.setFillColor(sf::Color(120, 0, 255));
        bar.setPosition(panelPos.x + 150.f, bottomY - h);
        win.draw(bar);

        drawLabel(win, "Alt", bar.getPosition().x + 10.f, bottomY + 5.f);
        drawValue(win, altPredCost, bar.getPosition().x, bar.getPosition().y - 20.f);
    }
}

void Histogram::drawLabel(sf::RenderWindow& win, const std::string& s, float x, float y) {
    sf::Text t(s, font, 18);
    t.setFillColor(sf::Color::Black);
    t.setPosition(x, y);
    win.draw(t);
}

void Histogram::drawValue(sf::RenderWindow& win, double v, float x, float y) {
    sf::Text t(std::to_string(static_cast<int>(v)), font, 14);
    t.setFillColor(sf::Color::Black);
    t.setPosition(x, y);
    win.draw(t);
}