北邮嵌入式系统实验报告完整版 - 图文 

void LCDChanged( const QString& str ); private: int counter;

int fh; // +1,-2,*3,/4,=5 int flag; //0:clear; 1:un-do int ans; }; #endif

>>>CCounter.cpp<<<

#include \

CCounter::CCounter ( QWidget * parent, const char * name, bool modal ) :QDialog( parent, name, modal ) {

m_stateLCD = cDigital; InitButton(); InitConnect();

setMinimumSize( cAppWidth, cAppHeight ); setMaximumSize( cAppWidth, cAppHeight ); }

CCounter::~CCounter() { }

void CCounter::InitConnect(void) // 建立信号和插槽的连接。二者的参数列表要相同 {

QObject::connect( m_pOn, SIGNAL( clicked() ),this, SLOT( ClearLCDNumber() ) ); QObject::connect( m_pCancel, SIGNAL( clicked() ),this, SLOT( DeleteLCDNumber() ) );

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

QObject::connect( SubButton, SIGNAL( clicked() ),this, SLOT( SubCounter() ) ); QObject::connect( MulButton, SIGNAL( clicked() ),this, SLOT( MulCounter() ) ); QObject::connect( DivButton, SIGNAL( clicked() ),this, SLOT( DivCounter() ) );

QObject::connect( EqlButton, SIGNAL( clicked() ),this, SLOT( Culculate() ) );

int i;

for ( i=0; i<=9; i++ ) {

QObject::connect( m_pDigitalBtn[i], SIGNAL( numChanged( const QString& ) ), this, SLOT( AddLCDNumber( const QString& ) ) ); }

QObject::connect( this, SIGNAL( LCDChanged( const QString& ) ), m_pLCD, SLOT( display( const QString& ) ) ); }

void CCounter::InitButton(void) {

int i=0, j=0; char chNum[4];

m_pLCD = new QLCDNumber( DisLenth , this, \// LCD m_pLCD->setSegmentStyle( QLCDNumber::Flat );

m_pLCD->setGeometry( 0, 0, cAppWidth, iHeightOther ); m_pOn = new QPushButton( \// On Button

m_pOn->setGeometry( 0*iWidthOn, 1*iHeightOther, iWidthOn, iHeightOther ); m_pCancel = new QPushButton( \// Cancel Button

m_pCancel->setGeometry( 1*iWidthOn, 1*iHeightOther, iWidthCancel, iHeightOther );

AddButton = new QPushButton( \

AddButton->setGeometry( 3*iWidthDigital, 2*iHeightOther, iWidthDigital, iHeightDigital );

SubButton = new QPushButton( \

SubButton->setGeometry( 3*iWidthDigital, 2*iHeightOther+1*iHeightDigital, iWidthDigital, iHeightDigital );

MulButton = new QPushButton( \

MulButton->setGeometry( 3*iWidthDigital, 2*iHeightOther+2*iHeightDigital, iWidthDigital, iHeightDigital );

DivButton = new QPushButton( \

DivButton->setGeometry( 3*iWidthDigital, 2*iHeightOther+3*iHeightDigital, iWidthDigital, iHeightDigital );

EqlButton = new QPushButton( \

EqlButton->setGeometry( 2*iWidthDigital, 2*iHeightOther+3*iHeightDigital, iWidthDigital, iHeightDigital );

for( i=0; i<=9; i++ ) // Digital Buttons { sprintf( chNum, \ m_pDigitalBtn[i] = new CDigitalButton( chNum, this ); QString s( chNum ); m_pDigitalBtn[i]->m_strNum = s; }

for( i=0; i<3; i++ ) // 3 rows for digital buttons from 1 to 9

{ for( j=0; j<3; j++ ) { m_pDigitalBtn[i*3+j+1]->setGeometry( j*iWidthDigital, 2*iHeightOther+i*iHeightDigital, iWidthDigital, iHeightDigital ); } }

m_pDigitalBtn[0]->setGeometry( 0*iWidthDigital, 2*iHeightOther+3*iHeightDigital, iWidthDigital, iHeightDigital ); ans=0; fh=0; flag=1; }

void CCounter::IncCounter() {

int num; bool ok;

if ( flag != 0) {

num = m_strLCD.toInt( &ok , 10 ); if ( fh ==1 ) ans += num;

if ( fh ==2 ) ans = ans-num; if ( fh ==3 ) ans = ans*num; if ( fh ==4 ) ans = ans/num; if ( fh ==0 ) ans = num; flag=0; fh=1;

m_strLCD = m_strLCD.setNum( ans ); emit LCDChanged( m_strLCD ); } }

void CCounter::SubCounter() {

int num; bool ok;

if ( flag != 0) {

num = m_strLCD.toInt( &ok, 10 );

if ( fh ==1 ) ans += num;

if ( fh ==2 ) ans = ans-num; if ( fh ==3 ) ans = ans*num; if ( fh ==4 ) ans = ans/num; if ( fh ==0 ) ans = num; flag=0; fh=2;

m_strLCD = m_strLCD.setNum( ans ); emit LCDChanged( m_strLCD ); } }

void CCounter::MulCounter() {

int num; bool ok;

if ( flag != 0) {

num = m_strLCD.toInt( &ok, 10 ); if ( fh ==1 ) ans += num;

if ( fh ==2 ) ans = ans-num; if ( fh ==3 ) ans = ans*num; if ( fh ==4 ) ans = ans/num; if ( fh ==0 ) ans = num;

flag=0; fh=3;

m_strLCD = m_strLCD.setNum( ans ); emit LCDChanged( m_strLCD ); } }

void CCounter::DivCounter() {

int num; bool ok;

if ( flag !=0 ) {

num = m_strLCD.toInt( &ok , 10 );

if ( fh ==1 ) ans += num;

if ( fh ==2 ) ans = ans-num; if ( fh ==3 ) ans = ans*num; if ( fh ==4 ) ans = ans/num; if ( fh ==0 ) ans = num;

flag=0; fh=4;

m_strLCD = m_strLCD.setNum( ans ); emit LCDChanged( m_strLCD ); } }

void CCounter::Culculate() {

int num; bool ok;

num = m_strLCD.toInt( &ok , 10 );

if ( flag != 0) {

if ( fh ==1 ) ans += num; if ( fh ==2 ) ans = ans-num; if ( fh ==3 ) ans = ans*num; if ( fh ==4 ) ans = ans/num; if ( fh ==0 ) ans = num; fh=0;

m_strLCD = m_strLCD.setNum( ans ); emit LCDChanged( m_strLCD ); } }

void CCounter::ClearLCDNumber() {

int len = m_strLCD.length(); if( len < DisLenth ) { flag=1; fh=0; ans=0; m_strLCD.truncate( 0 ); emit LCDChanged( m_strLCD ); // 发射信号