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91 строка
2.7 KiB
C++
91 строка
2.7 KiB
C++
#include <iostream>
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#include <vector>
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#include <string>
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#include <fstream>
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#include "svg.h"
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using namespace std;
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void svg_begin(double width, double height, ofstream& out) {
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out << "<?xml version='1.0' encoding='UTF-8'?>\n";
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out << "<svg "
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<< "width='" << width << "' "
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<< "height='" << height << "' "
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<< "viewBox='0 0 " << width << " " << height << "' "
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<< "xmlns='http://www.w3.org/2000/svg'>\n";
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}
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void svg_end(ofstream& out) {
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out << "</svg>\n";
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}
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void svg_text(double left, double baseline, string text, ofstream& out) {
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out << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>\n";
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}
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void svg_rect(double x, double y, double width, double height, ofstream& out,
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string stroke = "black", string fill = "black") {
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out << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height
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<< "' stroke='" << stroke << "' fill='" << fill << "' />\n";
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}
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void draw_scale(double width, double height, double max_width, size_t step, ofstream& out) {
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const double SCALE_HEIGHT = 30;
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const double TEXT_OFFSET = 20;
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const double MARK_HEIGHT = 10;
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double scale_y = height - SCALE_HEIGHT;
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svg_rect(0, scale_y, width, 2, out, "black", "black");
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double step_size = width / step;
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for (size_t i = 0; i <= step; i++) {
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double mark_x = i * step_size;
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svg_rect(mark_x, scale_y - MARK_HEIGHT, 2, MARK_HEIGHT, out, "black", "black");
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svg_text(mark_x - 5, scale_y + TEXT_OFFSET, to_string(i), out);
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}
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}
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void show_histogram_svg(const vector<size_t>& bins, size_t scale_step) {
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if (bins.empty()) {
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cerr << "Error: Empty bins vector\n";
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return;
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}
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ofstream out("marks.svg");
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if (!out.is_open()) {
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cerr << "Error: Cannot open output file\n";
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return;
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}
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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 MAX_WIDTH = IMAGE_WIDTH - TEXT_WIDTH;
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svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT, out);
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double top = 0;
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size_t max_count = bins[0];
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for (size_t bin : bins) {
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if (max_count < bin) {
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max_count = bin;
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}
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}
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for (size_t bin : bins) {
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const double bin_width = MAX_WIDTH * (static_cast<double>(bin) / max_count);
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svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin), out);
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svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, out, "black", "red");
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top += BIN_HEIGHT;
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}
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draw_scale(IMAGE_WIDTH, IMAGE_HEIGHT, MAX_WIDTH, scale_step, out);
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svg_end(out);
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out.close();
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}
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