头文件
- #ifndef WIDGET_H
- #define WIDGET_H
- #include <QWidget>
- #include <QPainter>
- #include <QTime>
- #include <QTimerEvent>
- #include <QDebug>
- QT_BEGIN_NAMESPACE
- namespace Ui { class Widget; }
- QT_END_NAMESPACE
- class Widget : public QWidget
- {
- Q_OBJECT
- public:
- Widget(QWidget *parent = nullptr);
- ~Widget();
- void paintEvent(QPaintEvent *event) override;
- private:
- Ui::Widget *ui;
- //声明 事件处理函数 重载
- void timerEvent(QTimerEvent *event) override;
- };
- #endif // WIDGET_H
复制代码 原文件
- #include "widget.h"
- #include "ui_widget.h"
- Widget::Widget(QWidget *parent)
- : QWidget(parent)
- , ui(new Ui::Widget)
- {
- ui->setupUi(this);
- this->startTimer(1000);
- }
- Widget::~Widget()
- {
- delete ui;
- }
- //时钟底座
- void Widget::paintEvent(QPaintEvent *event)
- {
- QPainter painter(this);//实例化画家
- QPen pen;//实例化笔
- QFont font;//实例化字体
- //画笔属性
- pen.setWidth(5);
- //字体属性
- font.setFamily("楷体");
- font.setPointSize(10);
- //画家属性
- painter.setPen(pen);
- painter.setFont(font);
- painter.translate(this->width()/2,this->height()/2);//画家坐标
- //绘制圆
- painter.drawEllipse(QPoint(0,0),300,300);
- //绘制粗刻度
- painter.rotate(-60);
- for(int i = 0; i < 12; i++)
- {
- painter.drawLine(300,0,290,0);
- painter.rotate(30);
- }
- //绘制细刻度
- pen.setWidth(2);
- painter.setPen(pen);
- painter.rotate(-24);
- for(int i = 0; i < 60 ; i++)
- {
- painter.drawLine(300,0,295,0);
- painter.rotate(6);
- }
- //获取系统时间
- QTime time = QTime::currentTime();
- //绘制秒针
- painter.setPen(pen);
- painter.rotate(-6);
- painter.rotate(6*time.second());
- painter.drawLine(290,0,0,0);
- painter.rotate(-6*time.second());
- //绘制分针
- pen.setWidth(10);
- painter.setPen(pen);
- painter.rotate(6*time.minute());
- painter.drawLine(200,0,0,0);
- painter.rotate(-6*time.minute());
- //绘制时针
- pen.setWidth(15);
- painter.setPen(pen);
- painter.rotate(30*time.hour());
- painter.drawLine(100,0,0,0);
- qDebug()<<time.hour()<<" "<<time.minute()<<" "<<time.second();
- }
- void Widget::timerEvent(QTimerEvent *event)
- {
- this->update();
- }
复制代码
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