Dynamic QscrollArea

Hello guys I have a problem ..
When I want to enter new parameters in the Qscroll area, put out from the new parameters and do not see the QscrollBar. I wish it were all dynamic, that when I post a new parameter, inserts it into the area by changing the bar ... how do I?? help!!

file .h

Code:

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class ParamPage : public QWidget
   {
  	 Q_OBJECT
   public:
       ParamPage(QWidget *parent = 0);
       QString text;
       QString prev;
       QLabel *label;
       QLineEdit *lineEdit;
       QPushButton *parButton;
       QPushButton *modButton;
       QLabel *pathLabel;
       QLineEdit *fileNameEdit;
        int num;
       QLineEdit *edit[10];
       int  lineNumber;
       QStringList listFileData;
       QScrollArea *scrollArea;
       QRect desktopGeometry;
       void writeToFile();
       void reactToSIP();
 
   private slots:
   void paramClicked();
   void modifClicked();
   void desktopResized(int screen);
 
 
   };
 
 
 
#endif

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file .cpp

Code:

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ParamPage::ParamPage(QWidget *parent)
     : QWidget(parent)
 {
 
	 desktopGeometry = QApplication::desktop()->availableGeometry(0);
	 scrollArea = new QScrollArea(this);
 
     QGroupBox *configGroup = new QGroupBox(scrollArea);
     QGridLayout *gridLayout = new QGridLayout(configGroup);
          configGroup->setLayout(gridLayout);
 
     parButton = new QPushButton(configGroup);
     parButton->setText("new_par");
     modButton = new QPushButton(configGroup);
     modButton->setText("add par");
     pathLabel = new QLabel(configGroup);
     pathLabel->setText("File");
     fileNameEdit = new QLineEdit(configGroup);
   //  QLabel *serverLabel = new QLabel(tr("Server:"));
 
     //QComboBox *serverCombo = new QComboBox;
     //serverCombo->addItem(tr("Trolltech (Australia)"));
     //serverCombo->addItem(tr("Trolltech (Germany)"));
     //serverCombo->addItem(tr("Trolltech (Norway)"));
     //serverCombo->addItem(tr("Trolltech (People's Republic of China)"));
     //serverCombo->addItem(tr("Trolltech (USA)"));
     gridLayout->addWidget(  parButton);
         gridLayout->addWidget(modButton);
         gridLayout->addWidget(pathLabel);
         gridLayout->addWidget(fileNameEdit);
 
         scrollArea->setWidget(configGroup);
              QHBoxLayout* layout = new QHBoxLayout();
              layout->addWidget(scrollArea);
              setLayout(layout);
              scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 
 
 
     //serverLayout->addWidget(serverCombo);
 
     connect(parButton, SIGNAL (clicked()), this, SLOT( paramClicked()));
     connect(modButton, SIGNAL (clicked()), this, SLOT( modifClicked()));
 
     connect(QApplication::desktop(), SIGNAL(workAreaResized(int)),
              this, SLOT(desktopResized(int)));
 
 
 }
 
void ParamPage::desktopResized(int screen)
 {
     if (screen != 0)
         return;
     reactToSIP();
 }
 
 void ParamPage::reactToSIP()
 {
     QRect availableGeometry = QApplication::desktop()->availableGeometry(0);
 
     if (desktopGeometry != availableGeometry) {
         if (windowState() | Qt::WindowMaximized)
             setWindowState(windowState() & ~Qt::WindowMaximized);
 
 
 
         setGeometry(availableGeometry);
     }
 
     desktopGeometry = availableGeometry;
 }
 
void ParamPage::paramClicked(){
	bool ok;
	 text = QInputDialog::getText(scrollArea, tr("Nuovo parametro"),
				                                          tr("Nome parametro:"), QLineEdit::Normal,QDir::home().dirName(),
				                                          &ok);
 
	 num = QInputDialog::getInteger(scrollArea, tr("Numero colonne"),tr("Percentage:"), 25, 0, 100, 1, &ok);
 
	 // QVBoxLayout *mainLayout = new QVBoxLayout;
 
			    	// QLabel* l = new QLabel("new label", this);
			    	 //	mainLayout->addWidget(l,1,0);
if(ok){
 
			    	    label = new QLabel(scrollArea);
			    	 			    //label->adjustSize();
			    	 			    //label->setIndent(15);
			    	 			    //this->layout()->set
 
			    	 			   this->layout()->addWidget(label);
			    	 			   label->setText(text);
			    	 			    for(int i;i<num;i++){
			    	 			   edit[i]=new QLineEdit(scrollArea);
			    	 			    	this->layout()->addWidget(edit[i]);
			    	 			    }
 
 
			    	 			  // mainLayout->addWidget(label,1,0);
 
			    	 			  // mainLayout->addWidget(label,3,0);
			    	 			//  setLayout(mainLayout);
 
			    	 			   //lineEdit = new QLineEdit(this);
 
			    	 			  	    //lineEdit->set
			    	 			  	 //   this->layout()->addWidget(lineEdit);
 
 
 
 
			    	 			    	//layout()->addWidget(lineEdit);
}
 
 
}
 
 
void ParamPage::modifClicked(){
QString fileName =
        QFileDialog::getOpenFileName(this, tr("Open CFG File"),
                                     QDir::currentPath(),
                                     tr("CFG Files ( *.cfg)"));
QFileInfo fileInfo(fileName);
 
 
fileNameEdit->setText(fileInfo.absoluteFilePath());
   //pathValueLabel = new QLabel(fileInfo.fileName());
   // pathValueLabel->setFrameStyle(QFrame::Panel | QFrame::Sunken);
 
QFile file(fileName);
 if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
     return ;
 QTextStream out(&file);
 prev="";
 lineNumber=0;
 while (!file.atEnd()) {
	QString line = file.readLine();
	listFileData.append(line);
     if(line.startsWith("Fine File")){
    	 //line=prev;
 
    	 QStringList list;
    			     list = line.split(QRegExp("\\s+"));
    				 QString str;
    				 str.append("Exec	");
    				 str.append("/CODE/ScriptFiles/BatchModeRunning/");
    				 str.append("\n");
    				 str.append("Fine File");
    				 str.append(list[1]);
    				 listFileData.replace(lineNumber,str);
 
 
 
     }
   //  else{
    	// prev= line;
    // }
     lineNumber ++;
 }
 writeToFile();
}
 
void ParamPage::writeToFile(){
 
QFile file("Config_new.cfg");
	if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
	 return;
 
	QTextStream out(&file);
	for(int i = 0;	i<listFileData.size(); i++)
		out << listFileData.at(i) << "\n";
}

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thankss!!!!

I don't have time to look at your code, but this code works fine.

I created a QMainwindow with just the scrollArea and a button.

Code:

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#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QVBoxLayout>
#include <QFrame>
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    m_Frame = new QFrame();
    ui->scrollArea->setWidget(m_Frame);
    QVBoxLayout* l = new QVBoxLayout();
    m_Frame->setLayout(l);
 
    connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(onButtonClicked()));
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::onButtonClicked()
{
    QPushButton* b = new QPushButton(this);
    m_Frame->layout()->addWidget(b);
}

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remove this line

Code:

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setLayout(layout);

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