Honeycombs: Difference between revisions
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</Window></syntaxhighlight>
[[File:CSharpHoneycomb.jpg]]
=={{header|C++}}==
{{libheader|Qt}}
<syntaxhighlight lang="cpp">//
// honeycombwidget.h
//
#ifndef HONEYCOMBWIDGET_H
#define HONEYCOMBWIDGET_H
#include <QWidget>
#include <vector>
class HoneycombWidget : public QWidget {
Q_OBJECT
public:
HoneycombWidget(QWidget *parent = nullptr);
protected:
void paintEvent(QPaintEvent *event) override;
void mouseReleaseEvent(QMouseEvent *event) override;
void keyPressEvent(QKeyEvent *event) override;
private:
struct Cell {
Cell(const QPolygon& p, int l, char ch)
: polygon(p), letter(l), character(ch), selected(false) {}
QPolygon polygon;
int letter;
char character;
bool selected;
};
std::vector<Cell> cells;
};
#endif // HONEYCOMBWIDGET_H</syntaxhighlight>
<syntaxhighlight lang="cpp">//
// honeycombwidget.cpp
//
#include "honeycombwidget.h"
#include <QtWidgets>
#include <algorithm>
#include <cmath>
#include <numeric>
#include <random>
HoneycombWidget::HoneycombWidget(QWidget *parent)
: QWidget(parent) {
setWindowTitle(tr("Honeycombs"));
const int rows = 4;
const int columns = 5;
const int margin = 15;
const int cellWidth = 90;
std::random_device dev;
std::mt19937 engine(dev());
char letters[26];
std::iota(std::begin(letters), std::end(letters), 0);
std::shuffle(std::begin(letters), std::end(letters), engine);
const double pi = 3.14159265358979323846264338327950288;
double x = cellWidth * std::sin(pi/6), y = cellWidth * std::cos(pi/6);
double cx = margin + cellWidth/2;
int i = 0;
for (int column = 0; column < columns; ++column) {
double cy = margin + y/2;
if (column % 2 == 1)
cy += y/2;
for (int row = 0; row < rows; ++row) {
QPolygon polygon(7);
polygon.setPoint(0, cx + x/2, cy - y/2);
polygon.setPoint(1, cx + cellWidth/2, cy);
polygon.setPoint(2, cx + x/2, cy + y/2);
polygon.setPoint(3, cx - x/2, cy + y/2);
polygon.setPoint(4, cx - cellWidth/2, cy);
polygon.setPoint(5, cx - x/2, cy - y/2);
polygon.setPoint(6, cx + x/2, cy - y/2);
int c = letters[i++];
cells.push_back(Cell(polygon, Qt::Key_A + c, 'A' + c));
cy += y;
}
cx += (x + cellWidth)/2;
}
int totalHeight = margin * 2 + y/2 + rows * y;
int totalWidth = margin * 2 + cellWidth + (columns-1) * (x + cellWidth)/2;
resize(totalWidth, totalHeight);
}
void HoneycombWidget::paintEvent(QPaintEvent *event) {
const QColor backgroundColor(255, 255, 255);
const QColor borderColor(0, 0, 0);
const QColor cellColor(255, 255, 0);
const QColor textColor(255, 0, 0);
const QColor selectedCellColor(255, 0, 255);
const QColor selectedTextColor(0, 0, 0);
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.fillRect(event->rect(), backgroundColor);
QFont font("Helvetica");
font.setPixelSize(40);
painter.setFont(font);
for (const Cell& cell : cells) {
QPainterPath path;
path.addPolygon(cell.polygon);
QPen pen(borderColor, 3);
painter.setPen(pen);
painter.setBrush(cell.selected ? selectedCellColor : cellColor);
painter.drawPath(path);
painter.setPen(cell.selected ? selectedTextColor : textColor);
painter.drawText(cell.polygon.boundingRect(),
Qt::AlignCenter, QString(cell.character));
}
}
void HoneycombWidget::mouseReleaseEvent(QMouseEvent *event) {
QPoint point = event->pos();
auto cell = std::find_if(cells.begin(), cells.end(),
[point](const Cell& c) {
return c.polygon.containsPoint(point, Qt::OddEvenFill);
});
if (cell != cells.end() && !cell->selected) {
cell->selected = true;
update(cell->polygon.boundingRect());
}
}
void HoneycombWidget::keyPressEvent(QKeyEvent *event) {
int key = event->key();
auto cell = std::find_if(cells.begin(), cells.end(),
[key](const Cell& c) { return c.letter == key; });
if (cell != cells.end() && !cell->selected) {
cell->selected = true;
update(cell->polygon.boundingRect());
}
}</syntaxhighlight>
<syntaxhighlight lang="cpp">//
// main.cpp
//
#include <QApplication>
#include "honeycombwidget.h"
int main(int argc, char *argv[]) {
QApplication a(argc, argv);
HoneycombWidget w;
w.show();
return a.exec();
}</syntaxhighlight>
{{out}}
[[Media:Honeycombs_qt.png]]
=={{header|Delphi}}==
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</pre>
=={{header|Go}}==
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