gamebrd.cpp

qt开发的一个简单的例程

#include <qapplication.h>
#include <qpushbutton.h>
#include <qfont.h>
#include <qlcdnumber.h>
//#include <qgrid.h>
#include <qlayout.h>
#include <qlabel.h>
#include "lcdrange.h"
#include "cannon.h"
#include "gamebrd.h"

GameBoard::GameBoard(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()));

/*	QGrid *grid = new QGrid(4,this);
	
	LCDRange *previous = 0;    
	for(int r=0;r<4;r++)
		for(int c=0;c<4;c++){	
			LCDRange *lr = new LCDRange(grid);
			if(previous)
				connect(lr,SIGNAL(valueChanged(int)),
					previous,SLOT(setValue(int)));
			previous = lr;
		}
*/
	LCDRange *angle = new LCDRange("Angle",this,"angle");
	angle->setRange(5,70);

	LCDRange *force = new LCDRange("Force",this,"force");
	force->setRange(10,50);

	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)));
	
	connect(cannonField,SIGNAL(hit()),this,SLOT(hit()));
	connect(cannonField,SIGNAL(missed()),this,SLOT(missed()));

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

	connect(cannonField,SIGNAL(canShoot(bool)),
		shoot,SLOT(setEnabled(bool)));

	QPushButton *restart
		= new QPushButton("&New Game",this,"newgame");
	restart->setFont(QFont("Times",18,QFont::Bold));
	connect(restart,SIGNAL(clicked()),this,SLOT(newGame()));

	hits = new QLCDNumber(2,this,"hits");
	shotsLeft = new QLCDNumber(2,this,"shotsleft");
	QLabel *hitsL = new QLabel("HITS",this,"hitsLabel");
	QLabel *shotsLeftL
		= new QLabel("SHOTS FEFT",this,"shotsleftLabel");

	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);
        //grid->setColStretch(0,2);
	
	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->addWidget(hits);
	topBox->addWidget(hitsL);
	topBox->addWidget(shotsLeft);
	topBox->addWidget(shotsLeftL);
	topBox->addStretch(1);
	topBox->addWidget(restart);
	
	angle->setValue(60);
	force->setValue(25);
	angle->setFocus();
	newGame();
}

void GameBoard::fire()
{
	if(cannonField->gameOver() || cannonField->isShooting())
		return;
	shotsLeft->display(shotsLeft->intValue()-1);
	cannonField->shoot();
}

void GameBoard::hit()
{
	hits->display(hits->intValue()+1);
	if(shotsLeft->intValue()==0)
		cannonField->setGameOver();
	else
		cannonField->newTarget();
}

void GameBoard::missed()
{
	if(shotsLeft->intValue()==0)
		cannonField->setGameOver();
}

void GameBoard::newGame()
{
	shotsLeft->display(15);
	hits->display(0);
	cannonField->restartGame();
	cannonField->newTarget();
}