QT学习--QSlider和QLCDNumber

//《24小时学通qt编程》

 

#include
#include 
#include 
#include
#include
#include
#include

class MyMainWindow:public QWidget
{
public:
    MyMainWindow();
private:
    QPushButton *b1;
    QLabel  *label;
    QLCDNumber *lcd;
    QSlider *slider;

};

MyMainWindow::MyMainWindow()
{
    //Orientation Vertical;
    setGeometry(100,300,300,350);
    b1=new QPushButton("Quit",this);
    b1->setGeometry(20,20,160,80);
    b1->setFont(QFont("Times", 18, QFont::Bold));
    lcd=new  QLCDNumber(2,this );
    lcd->setGeometry(100,150,150,100);
    slider=new QSlider(Qt::Vertical,this);
    slider->setGeometry(10,150,80,130);

    label=new QLabel(this);
    label->setGeometry(20,110,160,50);
    label->setText("This is the first line\n This is the second line");
   // label->setAlignment(AlignCenter);
    //label->setAlignment(AlignCenter);
    connect(b1,SIGNAL(clicked()),qApp,SLOT(quit()));
    connect(slider,SIGNAL(valueChanged(int)),lcd,SLOT(display(int)));
}

int main(int argc,char **argv)
{
    QApplication  a(argc,argv);
    MyMainWindow   w;
    //a.setMainWidget(&w);
    w.show();
    a.exec();
    return 1;
}