版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/title71/article/details/79008594
#include "mymainwindow.h"
#include "ui_mymainwindow.h"
#include <QTime>
#include <QTimer>
#include <QDebug>
#include <QPalette>
myMainWindow::myMainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::myMainWindow)
{
QPalette pe;
QFont font("Arial",16);
ui->setupUi(this);
pe.setColor(QPalette::Background,Qt::white);
pe.setColor(QPalette::WindowText,Qt::black);
ui->label->setAutoFillBackground(true);
ui->label->setPalette(pe);
ui->label->setFont(font);
QTimer *timer=new QTimer(this);
timer->start(1000);
connect(timer,SIGNAL(timeout()),this,SLOT(update()));
}
myMainWindow::~myMainWindow()
{
delete ui;
}
void myMainWindow::paintEvent(QPaintEvent *)
{
QDateTime dt=QDateTime::currentDateTime();
QString p;
p=dt.toString(" yyyy-MM-dd hh:mm:ss PA ");
this->ui->label->setText(p);
}
#ifndef MYMAINWINDOW_H
#define MYMAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class myMainWindow;
}
class myMainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit myMainWindow(QWidget *parent = 0);
~myMainWindow();
private:
Ui::myMainWindow *ui;
private slots:
void paintEvent(QPaintEvent *);
};
#endif // MYMAINWINDOW_H
#include "mymainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
myMainWindow w;
w.show();
return a.exec();
}