QTreeWidget column size problem

[Cruz]

Hello!

This is my first time using a tree widget. I managed to put it together using QTreeWidget and QTreeWidgetItem. In the first column of every item I have a checkbox and in the second colum there is a QString. I want the string to be flushed left to the checkbox on every level, but it doesn't work. If I open the tree deep enough, upper levels resize and create a gap between the checkbox and the text. The attached picture illustrates the problem.

treeview.png

Here is how I create it:

QTreeWidget *treeWidget = new QTreeWidget(this);
treeWidget->setColumnCount(2);
//treeWidget->header()->hide();
treeWidget->header()->setResizeMode(0, QHeaderView::ResizeToContents);
treeWidget->setAnimated(true);
treeWidget->setSelectionMode(QTreeWidget::NoSelection);
treeWidget->setFocusPolicy(Qt::NoFocus);
QList<QTreeWidgetItem*> items;
for (int i = 0; i < 3; ++i)
{
	QTreeWidgetItem* ti = new QTreeWidgetItem();
	ti->setText(0, QString("item: %1").arg(i));
 
	for (int j = 0; j < 3; ++j)
	{
		QTreeWidgetItem* ti2 = new QTreeWidgetItem();
		ti2->setCheckState(0, Qt::Unchecked);
		ti2->setText(1, QString("item: %1").arg(j));
 
		for (int k = 0; k < 3; ++k)
		{
			QTreeWidgetItem* ti3 = new QTreeWidgetItem();
			ti3->setCheckState(0, Qt::Unchecked);
			ti3->setText(1, QString("item: %1").arg(k));
			ti2->addChild(ti3);
		}
 
		ti->addChild(ti2);
	}
 
	items.append(ti);
}
treeWidget->insertTopLevelItems(0, items);

QTreeWidget *treeWidget = new QTreeWidget(this);
treeWidget->setColumnCount(2);
//treeWidget->header()->hide();
treeWidget->header()->setResizeMode(0, QHeaderView::ResizeToContents);
treeWidget->setAnimated(true);
treeWidget->setSelectionMode(QTreeWidget::NoSelection);
treeWidget->setFocusPolicy(Qt::NoFocus);
QList<QTreeWidgetItem*> items;
for (int i = 0; i < 3; ++i)
{
	QTreeWidgetItem* ti = new QTreeWidgetItem();
	ti->setText(0, QString("item: %1").arg(i));

	for (int j = 0; j < 3; ++j)
	{
		QTreeWidgetItem* ti2 = new QTreeWidgetItem();
		ti2->setCheckState(0, Qt::Unchecked);
		ti2->setText(1, QString("item: %1").arg(j));

		for (int k = 0; k < 3; ++k)
		{
			QTreeWidgetItem* ti3 = new QTreeWidgetItem();
			ti3->setCheckState(0, Qt::Unchecked);
			ti3->setText(1, QString("item: %1").arg(k));
			ti2->addChild(ti3);
		}

		ti->addChild(ti2);
	}

	items.append(ti);
}
treeWidget->insertTopLevelItems(0, items);

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How can I fix this?

And while we are at it, I would prefer to have this Windows Explorer style with the plus button, as can be seen in the simple tree model example. How can I get that?

[norobro]

Set the checkState and the text on the same column:

QTreeWidgetItem* ti2 = new QTreeWidgetItem();
ti2->setCheckState(0, Qt::Unchecked);
ti2->setText(0, QString("item: %1").arg(j));

QTreeWidgetItem* ti2 = new QTreeWidgetItem();
ti2->setCheckState(0, Qt::Unchecked);
ti2->setText(0, QString("item: %1").arg(j));

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The plus button is a function of the style. QCleanlooksStyle has a plus button.

[Cruz]

Thanks mate! Both suggestions work perfectly.

I'm going to need a second widget just like this, but instead of the checkboxes I will have to use sliders. Before I get lost in the depths of the model view framework, can anyone please point out the clear path to enlightment?