QTreeWidgetItem Problem

[spirit]

did you see notice in description of QTreeWidget::insertTopLevelItem?

If the item has already been inserted somewhere else it wont be inserted.

[sujan.dasmahapatra]

so how could I insert an item at the top and all other items should be increased by one and they should be rearranged ?

[spirit]

something like this?

QTreeWidget *treeWidget = new QTreeWidget();
	treeWidget->setColumnCount(1);
	QList<QTreeWidgetItem *> items;
	for (int i = 0; i < 10; ++i) {
		QTreeWidgetItem *parent = new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("item: %1").arg(i)));
		for (int j = 0; j < 10; ++j)
			new QTreeWidgetItem(parent, QStringList(QString("item: %1").arg(i)));
		items.append(parent);
	}
	treeWidget->insertTopLevelItems(0, items);
 
	QTreeWidgetItem *item = new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("item: %1").arg(-1)));
	for (int i = 0; i < 10; ++i) {
		QTreeWidgetItem *parent = new QTreeWidgetItem(item, QStringList(QString("item: %1").arg(i)));
		for (int j = 0; j < 10; ++j)
			new QTreeWidgetItem(parent, QStringList(QString("item: %1").arg(i)));
		items.append(parent);
	}
	treeWidget->insertTopLevelItem(0, item);
 
	QVBoxLayout *vbl = new QVBoxLayout(this);
	vbl->addWidget(treeWidget);

QTreeWidget *treeWidget = new QTreeWidget();
	treeWidget->setColumnCount(1);
	QList<QTreeWidgetItem *> items;
	for (int i = 0; i < 10; ++i) {
		QTreeWidgetItem *parent = new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("item: %1").arg(i)));
		for (int j = 0; j < 10; ++j)
			new QTreeWidgetItem(parent, QStringList(QString("item: %1").arg(i)));
		items.append(parent);
	}
	treeWidget->insertTopLevelItems(0, items);

	QTreeWidgetItem *item = new QTreeWidgetItem((QTreeWidget*)0, QStringList(QString("item: %1").arg(-1)));
	for (int i = 0; i < 10; ++i) {
		QTreeWidgetItem *parent = new QTreeWidgetItem(item, QStringList(QString("item: %1").arg(i)));
		for (int j = 0; j < 10; ++j)
			new QTreeWidgetItem(parent, QStringList(QString("item: %1").arg(i)));
		items.append(parent);
	}
	treeWidget->insertTopLevelItem(0, item);

	QVBoxLayout *vbl = new QVBoxLayout(this);
	vbl->addWidget(treeWidget);

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