Qt绘制表盘文件.txt

//.h


#ifndef DIAL_H
#define DIAL_H

#include <QLabel>
#include <QPaintEvent>
#include <QMouseEvent>
#include <QPainter>
#include <QList>
#include <QTimer>
#include <QTime>
#include <QString>
#include <QToolTip>


class dial: public QLabel
{
    //Q_OBJECT
public:
    float angle;
public:
    dial(QWidget *parent = 0);

    ~dial();

protected:
    void paintEvent(QPaintEvent *event);

private:

};
#endif // DIAL_H








//.cpp
#include "dial.h"
#include "mainwindow.h"

dial::dial(QWidget *parent)
    : QLabel(parent)
{
    this->resize(500,500);

    QTimer *timer = new QTimer(this);   //声明一个定时器
    connect(timer, SIGNAL(timeout()), this, SLOT(update()));  //连接信号槽，定时器超时触发窗体更新
    timer->start(50);   //启动定时器
}

dial::~dial()
{