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75 строки
1.8 KiB
C++
75 строки
1.8 KiB
C++
#include "svg.h"
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using namespace std;
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void svg_begin(double width, double height)
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{
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cout << "<?xml version='1.0' encoding='UTF-8'?>\n"
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<< "<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_text(double left, double baseline, string text)
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{
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cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
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}
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void svg_rect(double x, double y, double width, double height, const string& stroke, const string& fill)
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{
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cout << "<rect x='" << x
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<< "' y='" << y
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<< "' width='" << width
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<< "' height='" << height
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<< "' stroke='" << stroke
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<< "' fill='" << fill
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<< "' />\n";
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}
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void svg_end()
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{
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cout << "</svg>\n";
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}
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void show_histogram_svg(const vector<size_t>& bins)
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{
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const double IMAGE_WIDTH = 400;
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const double IMAGE_HEIGHT = 300;
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const double TEXT_LEFT = 20;
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const double TEXT_BASELINE = 20;
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const double TEXT_WIDTH = 50;
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const double BIN_HEIGHT = 30;
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const double BLOCK_WIDTH = 10;
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svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
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size_t max_count = 0;
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for (size_t count : bins)
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{
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if (count > max_count)
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{
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max_count = count;
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}
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}
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double max_width = IMAGE_WIDTH - TEXT_WIDTH;
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double top = 0;
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for (size_t count : bins)
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{
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double bin_width;
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if (max_count > 0)
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{
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bin_width = static_cast<double>(count) / max_count * max_width;
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}
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else
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{
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bin_width = 0.0;
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}
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svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(count));
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svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "blue", "#aaffaa");
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top += BIN_HEIGHT;
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}
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svg_end();
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}
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