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Source code

QTreeWidget* tree = new QTreeWidget(parentwidget); //tree creation
tree->setColumnCount(2); //not the point here but I need it

QTreeWidgetItem* main = new QTreeWidgetItem(tree); //1st level item creation
QTreeWidgetItem* child= new QTreeWidgetItem(main); //2d level item creation, with 'main' as parent
child->setHidden(false); //just to be sure

Source code

QTreeWidget* tree = new QTreeWidget(parentwidget);
tree->setColumnCount(2); 

QTreeWidgetItem* main = new QTreeWidgetItem(tree); 
QTreeWidgetItem* child= new QTreeWidgetItem(); //2d level creation, without parent
main -> addChild(enfant); //link child->parent
child->setHidden(false);

Source code

QTreeWidget* tree = new QTreeWidget(parentwidget);
tree->setColumnCount(2); 

QTreeWidgetItem* main = new QTreeWidgetItem(tree); 
QTreeWidgetItem* child= new QTreeWidgetItem(tree); //child is created as 1st level item
child->setHidden(false);

Source code

QTreeWidgetItem* item = new QTreeWidgetItem(tree);
item ->setCheckState(0,Qt::Checked); //to create the column 0 checkbox
item->setText(1,tr("Name")); //to label the ligne

//blablabla do the same for other items

connect( tree , SIGNAL( itemClicked( QTreeWidgetItem*,int ) ), this, SLOT ( updateitem ( QTreeWidgetItem*,int ) ) );

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//creation of the dockwidget and its components
QDockWidget* dockWidget = new QDockWidget(tr("Name"),this);
QTreeWidget* tree = createTree(dockWidget);
QWidget* otherwidget = createOtherWidget(dockWidget);

//creation of the design
QVBoxLayout* layout = new QVBoxLayout();
layout->addWidget(tree);
layout->addWidget(otherwidget);
dockWidget->setLayout(layout);

//finishing
addDockWidget(Qt::RightDockWidgetArea,dockWidget);

Source code

QTreeWidget* MyMainWindow::createTree(QWidget* parent){

    //creation of the tree and the main item
    QTreeWidget* tree = new QTreeWidget(parent);
    tree->setColumnCount(2);
    QTreeWidgetItem* main = new QTreeWidgetItem(tree);
    main-> setCheckState(0,Qt::Checked);
    main-> setText(1,tr("Gulf"));
    main -> setExpanded(true);

    //loading the children
    for( QList<MyObject>::iterator itr(_myList.begin()); itr!=_myList.end(); ++itr){
   
        QTreeWidgetItem* child = new QTreeWidgetItem();
        child->setCheckState(0,Qt::Checked);
        child->setText(1,itr->name());
        parent->addChild(child);
        child->setHidden(itr->ishidden());

    }//end for

    //do the connect

    connect( tree,	SIGNAL( itemClicked( QTreeWidgetItem*, int ) ),
		    this,	SLOT(  updateChild( QTreeWidgetItem*, int ) )
		   );

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QTreeWidgetItem* parent = new QTreeWidgetItem* (tree);

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QTreeWidgetItem* parent = new QTreeWidgetItem* ();
tree -> addTopLevelItem(parent);

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connect( tree,	SIGNAL( itemClicked( QTreeWidgetItem*, int ) ),
		    this,	SLOT(  updateChild( QTreeWidgetItem*, int ) )
		   );

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QTreeWidgetItem* main = new QTreeWidgetItem();
	main->setCheckState(0,Qt::Checked);
	main->setText(1,tr("Gulf"));

	if (!loadLayoutsContent())  return 0;

	_tree->addTopLevelItem( main );
	main -> setExpanded(true);
	Qt::CheckState debug_check = main->checkState(0);
	QVariant debug_label = main->data(1,Qt::DisplayRole);

Source code

_dockWidget = new QDockWidget(tr("Layers Manager"),this);
	QWidget* dockWidget = new QWidget();
	createLayers(dockWidget);
	QTreeWidgetItem* main = _tree->topLevelItem(0);
	Qt::CheckState debug_check = main->checkState(0);

Source code

    QApplication app( argc, argv );
    QtMapMainWindow mainwindow(0,dialog);
	Qt::CheckState debug_check = mainwindow.test();
	mainwindow.show();
	debug_check = mainwindow.test();
	app.connect( &app, SIGNAL( lastWindowClosed() ), &app, SLOT( quit() ) );
	debug_check = mainwindow.test();
	return app.exec();