cs-lab34/svg.cpp

#include <iostream>
#include <vector>
#include "svg.h"

void svg_begin(double width, double height) {
    std::cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
    std::cout << "<svg ";
    std::cout << "width23='" << width << "' ";
    std::cout << "height='" << height << "' ";
    std::cout << "viewBox='0 0 " << width << " " << height << "' ";
    std::cout << "xmlns='http://www.w3.org/2000/svg'>\n";
}

void svg_end() {
    std::cout << "</svg>\n";
}

void svg_text(double left, double baseline, std::string text, std::size_t font_size) {
    std::cout << "<text x='" << left << "' y='" << baseline << "' font-size='" << font_size << "'>" << text << "</text>";
}

void svg_rect(double x, double y, double width, double height, std::string stroke = "black", std::string fill = "black") {
        std::cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << " ' stroke='#000000' fill='#F8B496' ></rect>";
}

std::size_t in_font_size() {
    std::size_t font_size;
            do{
                std::cerr << "Enter font size >>";
                std::cin >> font_size;
                if (font_size < 8 || font_size > 32) {
                        std::cerr << "Please, observe the range 8-32!" << std::endl;
                }
            }while(font_size < 8 || font_size > 32);

        return font_size;
}


void show_histogram_svg(const std::vector<std::size_t>& bins) {

    const auto IMAGE_WIDTH = 400;
    const auto IMAGE_HEIGHT = 300;
    const auto TEXT_LEFT = 20;
    const auto TEXT_BASELINE = 20;
    const auto TEXT_WIDTH = 50;
    const auto BIN_HEIGHT = 30;
    const auto BLOCK_WIDTH = 10;
    std::size_t font_size = in_font_size();

    const std::size_t MAX_ASTERISK = IMAGE_WIDTH - TEXT_WIDTH;
    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
    double top = 0;

    std::size_t maxbin=bins[0];
    for (std::size_t i=0; i < bins.size(); i++){
        if (maxbin < bins[i]){
            maxbin=bins[i];
        }
    }

    if (maxbin<=76) {
        for (std::size_t i=0; i < bins.size(); i++) {
            double bin_width= MAX_ASTERISK * (static_cast<double>(bins[i]) / maxbin);
            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]), font_size);
            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
            top += BIN_HEIGHT;
        }
        svg_end();
    }
    else {
        for (std::size_t i=0; i < bins.size(); i++) {
            double bin_width = BLOCK_WIDTH * bins[i];
            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]), font_size);
            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
            top += BIN_HEIGHT;
        }
        svg_end();
    }

}