43 lines
959 B
C++
43 lines
959 B
C++
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#include "widget.h"
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#include "ui_widget.h"
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#include "qpainter.h"
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#include "qtimer.h"
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#include "qdebug.h"
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Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget)
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{
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ui->setupUi(this);
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interval = 20;
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count = 500;
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this->setWindowTitle(QString("随机大量矩形 帧率: %1 数量: %2 (QQ: 517216493 WX: feiyangqingyun)").arg(1000 / interval).arg(count));
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//定时器测试速度
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QTimer *timer = new QTimer(this);
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connect(timer, SIGNAL(timeout()), this, SLOT(update()));
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timer->start(interval);
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}
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Widget::~Widget()
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{
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delete ui;
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}
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void Widget::paintEvent(QPaintEvent *)
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{
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int width = this->width();
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int height = this->height();
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QPainter painter(this);
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QPen pen;
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pen.setWidth(2);
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pen.setColor(Qt::red);
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painter.setPen(pen);
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for (int i = 0; i < count; ++i) {
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int x = rand() % width;
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int y = rand() % height;
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painter.drawRect(x, y, 30, 30);
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}
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}
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