cannot write to QListWidget or QLineEdit

[landonmkelsey]

I have isolated the problem as follows:

I have some old old code for a TCP/IP server.

I cannot use QTCPIPServer or any Qt network programs!

I must use Qt 4 designer to make a gui to communicate with the TCP/IP server!

I press a button and a slot program calls the TCP/IP constructor.

The TCP/IP constructor calls the usual socket, bing, listen accept.

The program continues to work as a server but the code to write to a QListWidget or QLineEdit object does not work.

I've even tried putting the constructor in its own thread.

I've tried various placements of QApplication::processEvents();

#include "tcpip.h"
#include "tcpip_server.cpp"
#include "tcpip_client.cpp"
#include <iostream>
//#include <QtDebug>
tcpip::tcpip(QWidget *parent)
    : QWidget(parent)
{
	ui.setupUi(this);
	connect( ui.pushButtonStartTCPServer, SIGNAL(clicked()), this, SLOT(StartTCPServer()) );
	connect( ui.pushButtonStartTCPClient, SIGNAL(clicked()), this, SLOT(StartTCPClient()) );
 
     ui.listWidgetServer->addItem(QString("server constructor"));      ///works here
 
}
 
tcpip::~tcpip()
{
}
void tcpip::StartTCPServer()
{
	   ui.listWidgetServer->addItem(QString("server StartTCPServer"));  // not here
 
	//    QApplication::processEvents();
		bool ok = true;
		QString qstr = ui.lineEditTCPIPServerPortServer->text();
		port = qstr.toInt(&ok);
		//qDebug()<<" server port "<<port;
		ui.lineEditServerStatus->setText("server started");
 
		QApplication::processEvents();
 
	tcpipThread tcpipThreadStart(ui, port);
	tcpipThreadStart.run();
	tcpipThreadStart.wait(ULONG_MAX);
 
}
void tcpip::StartTCPClient()
{
    ui.listWidgetClient->addItem(QString("client StartTCPClient"));
	bool ok = true;
	QString qstr = ui.lineEditTCPIPServerPortClient->text();
 
	//QApplication::processEvents();
	ushort port = qstr.toInt(&ok);
	//qDebug()<<"client port = "<<port;
    tcpip_client* p_client = new tcpip_client((int)19999,port,FALSE, ui);
 
    str_client(p_client, ui); /* process the request */
    close();
}
 
 
}
void tcpip::currChanged(QWidget*){};
 
void tcpipThread::run()
{
	    tcpip_server* p_serv = new tcpip_server((int)19999,port,tcpip_server::str_echo, ui);
	             qDebug()<<"oops...back from CTOR";
	    delete p_serv;
}

#include "tcpip.h"
#include "tcpip_server.cpp"
#include "tcpip_client.cpp"
#include <iostream>
//#include <QtDebug>
tcpip::tcpip(QWidget *parent)
    : QWidget(parent)
{
	ui.setupUi(this);
	connect( ui.pushButtonStartTCPServer, SIGNAL(clicked()), this, SLOT(StartTCPServer()) );
	connect( ui.pushButtonStartTCPClient, SIGNAL(clicked()), this, SLOT(StartTCPClient()) );

     ui.listWidgetServer->addItem(QString("server constructor"));      ///works here

}

tcpip::~tcpip()
{
}
void tcpip::StartTCPServer()
{
	   ui.listWidgetServer->addItem(QString("server StartTCPServer"));  // not here
	    
	//    QApplication::processEvents();
		bool ok = true;
		QString qstr = ui.lineEditTCPIPServerPortServer->text();
		port = qstr.toInt(&ok);
		//qDebug()<<" server port "<<port;
		ui.lineEditServerStatus->setText("server started");
		
		QApplication::processEvents();
		
	tcpipThread tcpipThreadStart(ui, port);
	tcpipThreadStart.run();
	tcpipThreadStart.wait(ULONG_MAX);
 
}
void tcpip::StartTCPClient()
{
    ui.listWidgetClient->addItem(QString("client StartTCPClient"));
	bool ok = true;
	QString qstr = ui.lineEditTCPIPServerPortClient->text();

	//QApplication::processEvents();
	ushort port = qstr.toInt(&ok);
	//qDebug()<<"client port = "<<port;
    tcpip_client* p_client = new tcpip_client((int)19999,port,FALSE, ui);

    str_client(p_client, ui); /* process the request */
    close();
}


}
void tcpip::currChanged(QWidget*){};

void tcpipThread::run()
{
	    tcpip_server* p_serv = new tcpip_server((int)19999,port,tcpip_server::str_echo, ui);
	             qDebug()<<"oops...back from CTOR";
	    delete p_serv;
}

To copy to clipboard, switch view to plain text mode