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47 строки
1.5 KiB
C++
47 строки
1.5 KiB
C++
#include "svg.h"
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#include <iostream>
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#include <string>
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#include <vector>
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void svg_begin(double width, double height) {
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std::cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
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std::cout << "<svg ";
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std::cout << "width='" << width << "' ";
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std::cout << "height='" << height << "' ";
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std::cout << "viewBox='0 0 " << width << " " << height << "' ";
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std::cout << "xmlns='http://www.w3.org/2000/svg'>\n";
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}
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void svg_end() {
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std::cout << "</svg>\n";
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}
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void svg_rect(double x, double y, double width, double height, std::string stroke, std::string fill) {
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std::cout << "<rect x='" << x<< "' y='" << y << "' width='" << width << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << "' />\n";
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}
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void svg_text(double left, double baseline, std::string text) {
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std::cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>\n";
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}
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void show_histogram_svg(const std::vector<size_t>& bins) {
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const auto IMAGE_WIDTH = 400;
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const auto IMAGE_HEIGHT = 300;
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const auto TEXT_LEFT = 20;
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const auto TEXT_BASELINE = 20;
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const auto TEXT_WIDTH = 50;
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const auto BIN_HEIGHT = 30;
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const auto BLOCK_WIDTH = 10;
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svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
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for (size_t i = 0; i < bins.size(); ++i) {
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const double bin_width = BLOCK_WIDTH * bins[i];
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const double top = i * BIN_HEIGHT;
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svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]));
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svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "black", "#aaffaa");
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}
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svg_end();
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}
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