QT + VTK + VS2008

[Monicadiaz]

hi, well, i'm doing a project with qt, vtk, on VS 2008 C++

the project consist on move a hand with a haptic device in these case is a glove. i have the serial communication working well, my problem is with qt i think. I want when i press a pushbutton , make the connection with my haptic device and the values that this send move the hand, this part is kind working, when i pressed the hand move , but the window of qt is stopped, totally blocked and i don't really know why, any body can help me?

i have the next things

THE MAIN

#include <QtGui/QApplication>
#include "leer.h"

#include "SerialClass.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
leer w;
w.show();

return a.exec();
}

A PART OF THE CODE OF LEER

#include "leer.h"
#include "ui_leer.h"
#include "SerialClass.h"
#include <tchar.h>

#include "vtkPNGReader.h"
#include <vtkRenderWindow.h>
#include <vtksys/SystemTools.hxx>
#include <vtkCamera.h>
#include <QFileDialog>
#include <QString>

#include <QtGui/QMessageBox>
#include "TSerial.h"

leer::leer(QWidget *parent) : QMainWindow(parent),ui(new Ui::leer)
{
ui->setupUi(this);

renderer = vtkRenderer::New();
estilo = vtkInteractorStyleTrackballCamera::New();
iren = vtkRenderWindowInteractor::New();
renderer->SetBackground(0.043,0.18,0.58);
renderer->SetBackground2(0,0,0);
iren->SetInteractorStyle(estilo);

cargar_mano();

renderer->AddActor(articulaciones[0]);

renderer->ResetCamera();

ui->Renderizado->GetRenderWindow()->Render();
ui->Renderizado->GetRenderWindow()->AddRenderer(renderer);
ui->Renderizado->GetRenderWindow()->SetInteractor(iren);
ui->Renderizado->GetRenderWindow()->Render();

connect(ui->pushButton, SIGNAL(clicked()),SLOT (conexion()));

}
void leer::conexion()
{
// cout<<"Welcome to the serial test app!\n\n";
Serial* SP = new Serial("\\.\COM3"); // adjust as needed

if (SP->IsConnected())
cout<<"We're connected";

char incomingData[256] = "10"; // don't forget to pre-allocate memory
printf("%s \n",incomingData);
int dataLength = 4;
int readResult = 0;

while(SP->IsConnected())
{
readResult = SP->ReadData(incomingData,dataLength);
printf("Bytes read: (-1 means no data available) %i \n",readResult);
std::string test=incomingData;
printf("%s \n",incomingData);
//test = "";
int value=atoi(test.c_str());
printf("%i \n",value);
articulaciones[12]->SetOrientation(value,0,0);
ui->Renderizado->GetRenderWindow()->Render();
Sleep(100);
}

}

[sl.sy.ifm]

Qt is using just one thread for all GUI related things, this includes slots executed by GUI-events ... you put a endless loop("while(...Connected)") in the slot, so your code blocks the thread
slot-function shouldn't contain code that lasts for more then some milliseconds ...

You probably need to move the reading of serial-port to another thread ...
... or do it timer based (instead of sleeping and stay in one function you could use QTimer and have a function that only reads one time and then returns)