FillTool.cpp

#include "FillTool.h"

void FillTool::onMousePressed(const sf::Vector2f& pos, sf::Mouse::Button btn) {
    if (btn != sf::Mouse::Left) return;
    fillAt(pos);
}

void FillTool::fillAt(const sf::Vector2f& pos) {
    sf::Image img = m_canvas->copyToImage();
    unsigned w = img.getSize().x;
    unsigned h = img.getSize().y;

    if (pos.x < 0 || pos.y < 0 || pos.x >= (float)w || pos.y >= (float)h) return;

    sf::Color target = img.getPixel((unsigned)pos.x, (unsigned)pos.y);
    if (target == m_color) return; // óæå íóæíûé öâåò

    std::queue<sf::Vector2u> q;
    q.push({ (unsigned)pos.x, (unsigned)pos.y });

    while (!q.empty()) {
        auto p = q.front(); q.pop();
        if (p.x >= w || p.y >= h) continue;
        if (img.getPixel(p.x, p.y) != target) continue;

        img.setPixel(p.x, p.y, m_color);

        if (p.x > 0) q.push({ p.x - 1, p.y });
        if (p.x + 1 < w) q.push({ p.x + 1, p.y });
        if (p.y > 0) q.push({ p.x, p.y - 1 });
        if (p.y + 1 < h) q.push({ p.x, p.y + 1 });
    }

    m_canvas->updateFromImage(img);
}