I have a QWidget in my Window "AvailableDataWidget" while runtime I add layouts with groupboxes, labels and checkboxes. I want to delete them later and add new groupboxes and checkboxes.

This is the way I create it:

Qt Code: 
  1. void MonitorWindow::on_actionGetAvailableData_triggered(){
  2.        QVBoxLayout* verticalLayout[NumberOfAvailableTypes];
  3.        QVBoxLayout* verticalLayoutForWidget = new QVBoxLayout(ui->AvailableDataWidget);
  4.  
  5.        QGroupBox *TypeGroupBox[NumberOfAvailableTypes];
  6.  
  7.         for (int i = 0; i < NumberOfAvailableTypes; i++){           //1 groupbox for each type
  8.             TypeGroupBox[i] = new QGroupBox(ui->AvailableDataWidget);
  9.             TypeGroupBox[i]->setTitle(DataList.at(i).name);
  10.             verticalLayout[i] = new QVBoxLayout(TypeGroupBox[i]);
  11.  
  12.             if (DataList.at(i).type != TYPEBINARY){
  13.                 QCheckBox *DataCheckbox[DataList.at(i).quantity];
  14.                 QLabel* tempLabel[DataList.at(i).quantity];
  15.                 QHBoxLayout* horizontalLayout[DataList.at(i).quantity];
  16.  
  17.                 for (int j = 1; j <= DataList.at(i).quantity; j++){  
  18.                     DataCheckbox[j] = new QCheckBox(TypeGroupBox[i]);
  19.                     DataCheckbox[j]->setChecked(false);
  20.                     connect(DataCheckbox[j],SIGNAL(clicked()),SLOT(setTransducerFlags()));
  21.                     horizontalLayout[j] = new QHBoxLayout();
  22.                     horizontalLayout[j]->addWidget(DataCheckbox[j]);
  23.  
  24.                     tempLabel[j] = new QLabel(TypeGroupBox[i]);
  25.                     tempLabel[j]->setText(QString("%1%2%3").arg(DataList.at(i).name).arg(" ").arg(j));
  26.                     horizontalLayout[j]->addWidget(tempLabel[j]);
  27.  
  28.                     verticalLayout[i]->addLayout(horizontalLayout[j]);
  29.                 }
  30.             }
  31.             else{
  32.                 ...
  33.                 QCheckBox *DataCheckbox = new QCheckBox(TypeGroupBox[i]);
  34.                 DataCheckbox->setChecked(false);
  35.                 connect(DataCheckbox,SIGNAL(clicked()),SLOT(setTransducerFlags()));
  36.                 QLabel* tempLabel = new QLabel(TypeGroupBox[i]);
  37.                 tempLabel->setText(DataList.at(i).name);
  38.                 QHBoxLayout* horizontalLayout = new QHBoxLayout;
  39.                 horizontalLayout->addWidget(DataCheckbox);
  40.                 horizontalLayout->addWidget(tempLabel);
  41.                 myTransducermodel->addColumn(DataList.at(i).name);
  42.                 verticalLayout[i]->addLayout(horizontalLayout);
  43.             }
  44.             verticalLayoutForWidget->addWidget(TypeGroupBox[i]);
  45.         }
  46.     }
  47. }
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So I need to delete the layout and widgets, right?
AvailableDataWidget should be the parent of all layouts and widgets, so i tried this:
Qt Code: 
  1. QList<QWidget *> widgets = ui->AvailableDataWidget->findChildren<QWidget *>();
  2.    foreach(QWidget * widget, widgets){
  3.        delete widget;
  4.     }
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but it makes my program crash.