main.cpp

我在我的EP9315上写的两个QT程序

#include <qapplication.h>
#include <qpushbutton.h>
#include <qlcdnumber.h>
#include <qfont.h>
#include <qlayout.h>

#include "lcdrange.h"
#include "cannon.h"

class MyWidget: public QWidget
{
public:
  MyWidget( QWidget *parent=0,const char *name=0 );
};

MyWidget::MyWidget( QWidget *parent, const char *name)
        :QWidget( parent, name)
{
  QPushButton *quit =new QPushButton("Quit",this,"quit");
  quit->setFont( QFont( "Times",18,QFont::Bold) );

  connect(quit,SIGNAL(clicked()),qApp,SLOT(quit()) );
  
  LCDRange *angle = new LCDRange( "ANGLE", this, "angle" );
  angle->setRange( 5, 70);
  
  LCDRange *force = new LCDRange( "FORCE", this, "force" );
  force->setRange( 10, 50 );

  CannonField *cannonField
     =new CannonField(this,"cannonField" );
  
  connect( angle, SIGNAL(valueChanged(int)),cannonField,SLOT(setAngle(int)) );
  connect(cannonField,SIGNAL(angleChanged(int)),angle,SLOT(setValue(int))); 
  connect( force, SIGNAL(valueChanged(int)),cannonField,SLOT(setForce(int)) );
  connect(cannonField,SIGNAL(forceChanged(int)),force,SLOT(setValue(int))); 

  QPushButton *shoot =new QPushButton("Shoot",this,"shoot");
  shoot->setFont( QFont( "Times",18,QFont::Bold) );
  
  connect(shoot,SIGNAL(clicked()), cannonField,SLOT(shoot()) );

  QGridLayout *grid = new QGridLayout( this, 2, 2, 10);
  grid->addWidget( quit, 0, 0 );
 // grid->addWidget(angle,1, 0, Qt::AlignTop );
  grid->addWidget(cannonField, 1, 1);
  grid->setColStretch( 1, 10 );
  
  QVBoxLayout *leftBox = new QVBoxLayout ;
  grid->addLayout( leftBox, 1, 0 ); 
  leftBox->addWidget( angle );
  leftBox->addWidget( force );
 
  QHBoxLayout *topBox = new QHBoxLayout;
  grid->addLayout( topBox,0,1);
  topBox->addWidget( shoot );
  topBox->addStretch( 1 );

  angle->setValue( 60 );
  force->setValue( 20 );
  angle->setFocus();
}

int main( int argc, char **argv )
{    
  QApplication::setColorSpec( QApplication::CustomColor );
  QApplication a( argc, argv );
  MyWidget w;
  w.setGeometry( 10, 10, 220, 300 );
  a.setMainWidget( &w );
  w.show();
  return a.exec();
}