Hi,

I am trying to put some buttons dynamically into a QGridLayout, that is in a QTabView. Therefore I put that QGridLayout into a tab and fill it with the buttons.
The problem is, that when I add more than 4 Buttons to that layout it changes its parent somwhow and I get an error. The error occurs, when the button shall be added to the layout.
Qt Code: 
  1. Error:
  2. parent:  QWidget(0x289be8, name = "tabUserSpecificMethods") 
  3. parent:  QWidget(0x289be8, name = "tabUserSpecificMethods") 
  4. parent:  QWidget(0x289be8, name = "tabUserSpecificMethods") 
  5. parent:  QWidget(0x289be8, name = "tabUserSpecificMethods") 
  6. parent:  QWidget(0x289be8, name = "tabUserSpecificMethods") 
  7. parent:  screenMeasMeth(0x260830, name = "screenMeasMeth") 
  8. QLayout::parentWidget: A layout can only have another layout as a parent.
  9. Segmentation fault
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my Code looks like that:
Qt Code: 
  1. VLaytUserSpecificMethods = new QGridLayout(ui->tabUserSpecificMethods);   
  2.   VLaytUserSpecificMethods->setHorizontalSpacing(6);                                   
  3.   VLaytUserSpecificMethods->setVerticalSpacing(6);                                     
  4.   VLaytUserSpecificMethods->setObjectName(QString::fromUtf8("VLaytUserSpecificMethods")); 
  5.   VLaytUserSpecificMethods->setContentsMargins(10, 15, 0, 0);
  6.   VLaytUserSpecificMethods->setGeometry(QRect(0,0,431,490));
  7.  
  8.   for(int i = 0; i <= tmpMethodNames.size()-1; i++){
  9.     listBtnUserMeasMeth[i] = new QPushButton(this);
  10.     listBtnUserMeasMeth[i]->setVisible(true);
  11.     listBtnUserMeasMeth[i]->setText(tmpMethodNames.at(i));
  12.     listBtnUserMeasMeth[i]->setMaximumSize(QSize(200,55));
  13.     listBtnUserMeasMeth[i]->setMinimumSize(QSize(200,55));
  14.     listBtnUserMeasMeth[i]->setStyleSheet(globalStyleSheet::btnEnabled);
  15.     listBtnUserMeasMeth[i]->setFont(dynamicBtnFont);
  16.     listBtnUserMeasMeth[i]->setFocusPolicy(Qt::NoFocus);
  17.  
  18.     qDebug() << "parent: " << VLaytUserSpecificMethods->parent();
  19.     if(i % 2 == 0){
  20.         VLaytUserSpecificMethods->addWidget(listBtnUserMeasMeth[i],c_GridRowCounter,0);
  21.     }
  22.     else{
  23.         VLaytUserSpecificMethods->addWidget(listBtnUserMeasMeth[i],c_GridRowCounter,1);
  24.         c_GridRowCounter++;
  25.     }
  26.   }
  27.   VLaytUserSpecificMethods->addItem(VSpacerBtnList,++c_GridRowCounter,0);
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Does anybody know the reason, why this happens?