cs-lab34/svg.cpp

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

using namespace std;

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

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

void
svg_text(double left, double baseline, string text){
    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
}

void
svg_rect(double x, double y, double width, double height, string stroke, string fil){
    cout << "<rect x = '" << x << "' y = '" << y << "' width = '" << width << "' height = '" << height << "' stroke = '" << stroke << "' fill = '" << fil << "' />";
}

//string bin_color(size_t bin, size_t max_count){
//    return ("#" + to_string(10 - (bin * 9) / max_count) + to_string(10 - (bin * 9) / max_count) + to_string(10 - (bin * 9) / max_count));
//}

void
show_histogram_svg(const vector<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;
    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);

    size_t max_count = 0;
    for (size_t x: bins) {
        if (x > max_count) {
                max_count = x;
        }
    }

    double top = 0;
    for (size_t bin : bins) {
        const double bin_width = (IMAGE_WIDTH - TEXT_WIDTH) * bin / max_count;
        //const auto color = bin_color(bin,max_count);
        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT,"red", "#ffeeee");
        top += BIN_HEIGHT;
    }
    svg_end();
}