qtDemo/Shell_NotifyIcon/menudialog.h

#ifndef MENUDIALOG_H
#define MENUDIALOG_H

#include <QDialog>
#include <QDebug>
#include <qdatetime.h>



static QString  getRandomString(int length) //获取指定长度的字符串
{
    qsrand(QDateTime::currentMSecsSinceEpoch());//为随机值设定一个seed

    const char chrs[] = "0123456789";
    int chrs_size = sizeof(chrs);

    char* ch = new char[length + 1];
    memset(ch, 0, length + 1);
    int randomx = 0;
    for (int i = 0; i < length; ++i)
    {
        randomx= rand() % (chrs_size - 1);
        ch[i] = chrs[randomx];
        if(i % 8 ==  0 && ch[i] == '0'){  //数字开头不能为0
            i = i-1;
        }
    }
    QString ret(ch);
    delete[] ch;
    return ret;
}

namespace Ui {
class MenuDialog;
}

class MenuDialog : public QDialog
{
    Q_OBJECT

public:
    explicit MenuDialog(QWidget *parent = nullptr);
    ~MenuDialog();

    void uodateNumbers();
    void updateImage();

private slots:
    void on_pushButton_exit_clicked();

private:
    void initUI();
    Ui::MenuDialog *ui;

protected:
    virtual void
    mousePressEvent(QMouseEvent *event){};  //不执行默认的事件，不然一点窗口就消失了
    virtual void
    mouseDoubleClickEvent(QMouseEvent *event){};
    virtual void
    mouseReleaseEvent(QMouseEvent *event){};

};

#endif // MENUDIALOG_H