#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 << "' 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, const string& text) { cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>\n"; } void svg_rect(double x, double y, double width, double height, const string& stroke, const string& fill) { cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << "' />\n"; } 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; size_t max_count = 0; for (size_t count : bins) { if (count > max_count) { max_count = count; } } double BLOCK_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH) / static_cast<double>(max_count); svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT); double top = 0; 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, "blue", "#aaaaff"); top += BIN_HEIGHT; } svg_end(); }