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88 строки
2.4 KiB
C++
88 строки
2.4 KiB
C++
#include "svg.h"
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#include <algorithm>
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#include <string>
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#include <iostream>
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using namespace std;
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namespace svg {
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size_t BLOCK_WIDTH = 10;
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size_t input_block_width() {
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size_t width;
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while (true) {
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cout << "Ââåäèòå øèðèíó áëîêà ãèñòîãðàììû (3-30px): ";
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cin >> width;
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if (width < 3) {
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cout << "Øèðèíà ñëèøêîì ìàëà. Ìèíèìàëüíîå çíà÷åíèå: 3px. Ïîæàëóéñòà, ïîâòîðèòå ââîä.\n";
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} else if (width > 30) {
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cout << "Øèðèíà ñëèøêîì âåëèêà. Ìàêñèìàëüíîå çíà÷åíèå: 30px. Ïîæàëóéñòà, ïîâòîðèòå ââîä.\n";
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} else {
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break;
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}
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}
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return width;
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}
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void set_block_width(size_t width) {
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BLOCK_WIDTH = width;
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}
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void begin(ostream& out, double width, double height) {
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out << "<?xml version='1.0' encoding='UTF-8'?>\n";
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out << "<svg width='" << width << "' 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 end(ostream& out) {
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out << "</svg>\n";
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}
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void text(ostream& out, double left, double baseline, const string& text) {
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out << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>\n";
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}
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void rect(ostream& out, double x, double y, double width, double height,
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const string& stroke, const string& fill) {
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out << "<rect x='" << x << "' y='" << y << "' width='" << width
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<< "' height='" << height << "' stroke='" << stroke
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<< "' fill='" << fill << "' />\n";
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}
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void show_histogram_svg(ofstream& out, const vector<size_t>& bins, size_t block_width) {
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begin(out, IMAGE_WIDTH, IMAGE_HEIGHT);
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if (bins.empty()) {
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end(out);
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return;
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}
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const size_t max_count = *max_element(bins.begin(), bins.end());
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if (max_count == 0) {
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end(out);
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return;
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}
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const double max_svg_width = IMAGE_WIDTH - TEXT_WIDTH - 40;
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const double scale = max_svg_width / max_count;
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double top = 0;
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for (size_t bin : bins) {
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double width = bin * scale * (block_width / 10.0);
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text(out, TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
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rect(out, TEXT_WIDTH, top, width, BIN_HEIGHT, "black", "#aaffaa");
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top += BIN_HEIGHT;
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}
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end(out);
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}
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}
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