cs-lab34/svg.cpp

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

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 = "black", string fill = "red"){
    cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << " ' stroke='" << stroke << "' fill='" << fill << "' ></rect>";
}


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 = 15;

    const size_t MAX_WIDTH = IMAGE_WIDTH - TEXT_WIDTH - 1;

    size_t maxbin = 0;
    for (size_t bin : bins){
        if (bin > maxbin){
                maxbin = bin;
        }
    }

    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
    double top = 0;
    if (maxbin<=76){
        for (size_t bin : bins) {
            double bin_width = BLOCK_WIDTH * bin;
            svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
            top += BIN_HEIGHT;
        }
        svg_end();
    } else {
        for (size_t bin : bins) {
            double bin_width= MAX_WIDTH * (static_cast<double>(bin) / maxbin);
            svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
            top += BIN_HEIGHT;
        }
        svg_end();
    }
}