8_4.cpp

一个qt设计的教程

#include <qapplication.h>
#include <qwidget.h>
#include <qslider.h>
#include <qprogressbar.h>

class MyMainWindow:public QWidget
{
 public:
    MyMainWindow();
 private:
    QProgressBar *bar;
    QSlider *slider;
};

MyMainWindow::MyMainWindow()
{
 setGeometry(100,100,200,90);
 
 bar = new QProgressBar(100,this);
 bar->setGeometry(10,10,180,30);

 slider = new QSlider(0,100,10,0,Horizontal,this);
 slider->setGeometry(10,50,180,30);
 
 connect(slider,SIGNAL(valueChanged(int)),bar,SLOT(setProgress(int)));
}

main(int argc,char **argv)
{
 QApplication a(argc,argv);
 MyMainWindow w;

 a.setMainWidget(&w);
 w.show();
 a.exec();
}