mainwindow.cpp~

这是基于QT2.3.10的信号和槽的一个实例

#include "mainwindow.h"

MainWindow::MainWindow( QWidget *parent, const char *name ):QWidget( parent, name )

{
  QFont f( "Helvetica", 14, QFont::Bold );
  
  setFont( f );

 AddButton = new QPushButton( "Add", this );

 AddButton->setGeometry( 50, 15, 90, 40 );

 SubButton = new QPushButton( "Sub", this );

 SubButton->setGeometry( 50, 70, 90, 40 );

 counter = new Counter( this );

 counter->setGeometry( 50, 125, 90, 40 );

 QObject::connect( AddButton, SIGNAL( clicked() ), counter, SLOT( IncCounter() ) );

 QObject::connect( SubButton, SIGNAL( clicked() ), counter, SLOT( DecCounter() ) );

}