QUdpSocket傳輸圖片QImage(QPixmap...)

/*************************************sender.h*******************************/
#ifndef SENDER_H
#define SENDER_H

#include
#include
#include
#include
#include
#include
#include

class Sender : public QWidget
{
Q_OBJECT
private:
QLabel* m_label;
QPushButton* m_browse;
QUdpSocket* m_socket;
const static quint16 port = 6163;
public:
Sender(QWidget *parent = 0);
~Sender();
private slots:
void browse();
};

#endif // SENDER_H



/********************************sender.cpp**********************************/
#include "widget.h"

Sender::Sender(QWidget *parent)
: QWidget(parent)
{
m_label = new QLabel(this);
m_label->setFixedSize(320,240);
m_label->move(0,0);
m_label->show();

m_browse = new QPushButton("browse",this);
m_browse->setFixedSize(m_browse->sizeHint());
m_browse->move(330,0);
m_browse->show();
connect(m_browse,SIGNAL(clicked()),this,SLOT(browse()));

m_socket = new QUdpSocket(this);
bool result = m_socket->bind(port);
if(!result)
{
QMessageBox::critical(0,"error","Bind Error!");
return;
}
}

Sender::~Sender()
{

}
void Sender::browse()
{
QString path;
QFileDialog* fd = new QFileDialog;
fd->setViewMode(QFileDialog::Detail);
path = fd->getOpenFileName(this,tr("Images"),"./",tr("ImageFiles (*.jpg *.png *.gif *.jpeg)"));


#ifdef Q_OS_WIN32
path.replace("/","\\");
#endif
if ( !path.isEmpty() )
{
m_label->clear();
m_label->setPixmap(QPixmap(path));

QImage image(path);

QByteArray ba;
QBuffer buffer(&ba);
buffer.open(QIODevice::ReadWrite);
image.save(&buffer, "PNG");
qint64 res;
if((res = m_socket->writeDatagram(ba,QHostAddress::Broadcast,port)) != ba.length())
{
return;            
}
//        QMessageBox::about(0,QString::number(ba.length())+"  "+QString::number(res),ba);
}
}



/****************************************receiver.h*****************************/ 
#ifndef RECEIVER_H
#define RECEIVER_H

#include  
#include
#include
#include

class Receiver : public QWidget 
{
Q_OBJECT
private:
QLabel* m_label;
QUdpSocket* m_socket;
const static quint16 port = 6163;
public:
Receiver(QWidget *parent = 0);
~Receiver();
private slots:
void readData();
};

#endif // RECEIVER_H 



/*******************************receiver.cpp******************************/ 
#include "widget.h"

Receiver::Receiver(QWidget *parent) 
: QWidget(parent)
{

this->setFixedSize(640,480); 
this->move(0,0);
m_label = new QLabel(this);
m_label->setFixedSize(1024,768);
m_label->move(0,0);
m_label->show();

m_socket = new QUdpSocket(this); 
bool result = m_socket->bind(port);
if(!result)
{
QMessageBox::critical(0,"error","Bind Error!");
return;
}
connect(m_socket,SIGNAL(readyRead()),this,SLOT(readData()));
}

Receiver::~Receiver() 
{

} 
void Receiver::readData()
{
while (m_socket->hasPendingDatagrams())
{
QByteArray datagram;
datagram.resize(m_socket->pendingDatagramSize());
m_socket->readDatagram(datagram.data(), datagram.size());

QImage image; 
image.loadFromData(datagram);

QPixmap pm; 
pm = pm.fromImage(image);
m_label->clear();
m_label->setPixmap(pm);
this->update();
}

}