Dynamic number of QLabel

Hello,

I have a problem to create a dynamic number of QLabel and QLineEdit.

I have build a QList:

Code:

---

QList<QLineEdit*> dongleDataLineEdit;
QList<QLabel*> dongleDataLabel;

---

Now, the code to generate my QLabel an QLineEdit.

Code:

---

void CMainWindow::setDongleDataField() {
	for (int i=0; i<plainDongle->DNG_Memmory/4; i++) {
		dongleDataLabel.append(new QLabel);
		dongleDataLineEdit.append(new QLineEdit);
	}
 
	displayDongleData();
}
 
void CMainWindow::displayDongleData() {
	QGridLayout *dongleLayout = new QGridLayout;
	int x = 0;
 
	for (int i; i<plainDongle->DNG_Memmory/4; i++) {
		dongleDataLabel[i]->setText(tr("Value "+i));
		dongleLayout->addWidget(dongleDataLabel[i], x, 0);
		dongleLayout->addWidget(dongleDataLineEdit[i], x, 1);
		x++;
	}
}

---

The problem is, my program does not start, it terminated without any error.

Can someone help me to fix the problem?

Quote:

---

Originally Posted by jd

Code:

---

void CMainWindow::displayDongleData() {
	QGridLayout *dongleLayout = new QGridLayout;

---

---

Code:

---

QGridLayout *dongleLayout = new QGridLayout(this);

---

and is CMainWindow shown? What is CMainWindow? have you called "app.exec()" in main?

Quote:

---

Originally Posted by jd

Code:

---

int x = 0;
 
	for (int i; i<plainDongle->DNG_Memmory/4; i++) {
		dongleDataLabel[i]->setText(tr("Value "+i));
		dongleLayout->addWidget(dongleDataLabel[i], x, 0);
		dongleLayout->addWidget(dongleDataLineEdit[i], x, 1);
		x++;
	}
}

---

---

You don't need "int x" just use "i". And better use "i<dongleDataLabel.size()"

EDIT: once you have "dongleDataLabel." and once "dongleDataLabel->"? but that must result in an compiler error...

Argh!

The mistake was her:

Code:

---

for (int i; i<plainDongle->DNG_Memmory/4; i++) {

---

i has no value...

so my program starts, but i have another problem with my layout.

If i call

Code:

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setLayout(dongleLayout);

---

I become an error, wicht a layout is already set. How can I add my dongleLayout to CMainWindow?

CMainWindow is my QMainWindow I've created this with QtDesigner.
I can't found a function addLayout.

The error:
QWidget::setLayout: Attempting to add QLayout "" to QWidget "layoutWidget", which already has a layout