QT中绘制点阵

最新推荐文章于 2024-08-23 16:22:20 发布

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最新推荐文章于 2024-08-23 16:22:20 发布 · 483 阅读

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#qt

1.QGraphicsScene，QGraphicsView，QGraphicsItem机制

#include <QApplication>
#include <QGraphicsView>
#include <QGraphicsScene>
#include <QGraphicsEllipseItem>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QGraphicsScene scene;
    QGraphicsView view(&scene);
    view.setWindowTitle("Point Grid");
    view.setGeometry(100, 100, 500, 500);

    int gridSize = 10;
    int gridSpacing = 20;

    for (int i = 0; i < view.width(); i += gridSpacing) {
        for (int j = 0; j < view.height(); j += gridSpacing) {
            QGraphicsEllipseItem *point = new QGraphicsEllipseItem(i, j, gridSize, gridSize);
            point->setBrush(Qt::black);
            scene.addItem(point);
        }
    }

    view.show();

    return app.exec();
}