field.cpp

一个多进程通信的演示

#include <QDateTime>
#include <QPaintEvent>
#include <QPainter>
#include <QTimer>
#include <stdio.h>

#include "field.h"
extern "C"{
	#include "connect.h"
};

extern "C"{
	void getPos( int *x, int *y);
};

Field::Field( QWidget* parent )
	:QWidget( parent )
{	
	bTransSignal = false;
	bWait = true;	
	timer = new QTimer(this);
	timer->start(4);
	timeCount = 0;	
	connect(timer, SIGNAL(timeout()), this, SLOT(move()));
	
	setPalette(QPalette(QColor(250, 250, 200)));
    	setAutoFillBackground(true);

}

void Field::paintEvent( QPaintEvent* event )	
{
	QPainter painter(this);
    	painter.setPen(Qt::NoPen);
    	painter.setBrush(Qt::blue);

	int x;
 	int y;
	int radious = 25;
	getPos( &x, &y );

	painter.drawRoundRect( x- radious - 400, y - radious, 2*radious, 2*radious );
} 

void Field::move()
{	
	int x;
 	int y;

	getPos( &x, &y );
	update( 0, 0, 400, 400 );
}