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74 строки
2.0 KiB
C++
74 строки
2.0 KiB
C++
#include "svg.h"
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#include <string>
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using namespace std;
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void svg_begin(double width, double height) {
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cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
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cout << "<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() {
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cout << "</svg>\n";
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}
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void svg_text(double left, double baseline, const string& text) {
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cout << "<text x='" << left
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<< "' y='" << baseline
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<< "'>" << text
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<< "</text>\n";
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}
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void svg_rect(double x, double y, double width, double height,
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const string& stroke, const string& fill) {
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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 show_histogram_svg(const std::vector<size_t>& bins, double bin_size, double min_val) {
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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 VSPACE = BIN_HEIGHT + TEXT_BASELINE * 2 + 5;
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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 c : bins)
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if (c > max_count)
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max_count = c;
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double max_width = IMAGE_WIDTH - TEXT_WIDTH - 100;
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for (size_t j = 0; j < bins.size(); ++j) {
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size_t count = bins[j];
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double y = j * VSPACE;
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double width;
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if (max_count > 0) {
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width = static_cast<double>(count) / max_count * max_width;
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}
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else {
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width = 0.0;
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}
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svg_text(TEXT_LEFT, y + TEXT_BASELINE, to_string(count));
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svg_rect(TEXT_WIDTH, y, width, BIN_HEIGHT, "blue", "blue");
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double boundary = min_val + bin_size * (j + 1);
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svg_text(TEXT_WIDTH,y + BIN_HEIGHT + TEXT_BASELINE,to_string(boundary)
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);
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}
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svg_end();
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}
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