04-01.cpp

qt实例代码！《24小时学通qt编程》 的代码！不错！已经在qt2.3.7调试ok！第4章

#include <qapplication.h>
#include <qwidget.h>
#include <qpushbutton.h>
#include <qfont.h>
#include <qlcdnumber.h>
#include <qslider.h>

class MyMainwindow : public QWidget
{
public:
	MyMainwindow();
private:
	QPushButton *b1;
	QLCDNumber *lcd;
	QSlider *slider;
};

MyMainwindow::MyMainwindow()
{
	setGeometry(100, 100, 200, 170);

	b1 = new QPushButton("Buttom 1", this);
	b1->setGeometry(10, 10, 80, 40);
	b1->setFont(QFont("Time", 18, QFont::Bold));

	lcd = new QLCDNumber(2, this);
	lcd->setGeometry(100, 10, 190, 180);

	slider = new QSlider(Vertical, this);
	slider->setGeometry(10, 60, 80, 130);

	//
	//
	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();
}