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59 строки
1.6 KiB
C++

#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();
}