实现效果：
代码：
#ifndef IMAGINIST_H
#define IMAGINIST_H
#include <QtWidgets/QWidget>
#include <QtWidgets/QLabel>
#include <QtCore/QPoint>
#include <QtSql/QSqlDatabase>
#include <QtSql/QSqlQuery>
#include <QtSql/QSql>
#include <QPalette>
#include <QColor>
#include <QFont>
#include <QTimer>
#include <QTime>
#include "ui_imaginist.h"
class imaginist : public QWidget
{
Q_OBJECT
public:
imaginist(QWidget *parent = 0);
~imaginist();
protected:
void mousePressEvent(QMouseEvent *event);
void mouseMoveEvent(QMouseEvent *event);
private:
Ui::imaginistClass ui;
QPoint Position;
QPalette pe;
QFont font;
QTimer * timer;
QSqlDatabase db;
QColor color;
QTime time;
private slots:
void showText();
};
#endif // IMAGINIST_H