setContentsMargins in QAbstractItemView

[Promethee]

Hi everybody,

I would like to make a view of my own, containing some widgets layouted in a QGridLayout. So I sub classed QAbstractItemView. But I have a problem with the function setContentsMargins() : this function does nothing. What is strange is that with a QFrame (parent of QAbstractItemView), it is possible to set the margins. Here is my code:

QTextEdit* textEdit1 = new QTextEdit;
  QTextEdit* textEdit2 = new QTextEdit; 
 
  MyOwnView* myView = new MyOwnView(this);
  myView->setContentsMargins(50,50,50,50);
  QGridLayout* gridLayout1 = new QGridLayout(myView);
  gridLayout1->addWidget(textEdit1, 0, 0);
  myView->setLayout(gridLayout1);
 
  QFrame* frame = new QFrame(this);
  frame->setContentsMargins(50,50,50,50);  
  QGridLayout* gridLayout2 = new QGridLayout(frame);
  gridLayout2->addWidget(textEdit2, 0, 0);
  frame->setLayout(gridLayout2); 
 
  QStackedWidget* stackedWidget = new QStackedWidget(this);
  stackedWidget->addWidget(myView);
  stackedWidget->addWidget(frame); 
 
  setCentralWidget(stackedWidget);

QTextEdit* textEdit1 = new QTextEdit;
  QTextEdit* textEdit2 = new QTextEdit; 

  MyOwnView* myView = new MyOwnView(this);
  myView->setContentsMargins(50,50,50,50);
  QGridLayout* gridLayout1 = new QGridLayout(myView);
  gridLayout1->addWidget(textEdit1, 0, 0);
  myView->setLayout(gridLayout1);

  QFrame* frame = new QFrame(this);
  frame->setContentsMargins(50,50,50,50);  
  QGridLayout* gridLayout2 = new QGridLayout(frame);
  gridLayout2->addWidget(textEdit2, 0, 0);
  frame->setLayout(gridLayout2); 

  QStackedWidget* stackedWidget = new QStackedWidget(this);
  stackedWidget->addWidget(myView);
  stackedWidget->addWidget(frame); 

  setCentralWidget(stackedWidget);

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On the first attached image the QTextEdit is inside a QFrame and the second one it is inside a QAbstractItemView

Did somebody experiment the same issue? Is it a Qt bug or one of my own?

[wysota]

I think you should first set the layout for the widget and then change the margins and not the other way round.

[Xagen]

QGridLayout has two functions that you shoulf use:
setMargin( int ) // you should use 0
setSpacing( int ) // 0

This is the solution of your problem.