How can I find the selected item in a QTreeWidget?

Question

I have a class that inherits QTreeWidget. How can I find the currently selected row? Usually I connect signals to slots this way:

connect(myButton, SIGNAL(triggered(bool)), this, SLOT(myClick()));

However, I can't find anything similar for QTreeWidget->QTreeWidgetItem. The only way I found is to redefine the mousePressEvent of the QTreeWidget class like this:

void MyQTreeWidget::mousePressEvent(QMouseEvent *e){
    QTreeView::mousePressEvent(e);
    const QModelIndex index = indexAt(e->pos());
    if (!index.isValid())
    {
    const Qt::KeyboardModifiers modifiers = QApplication::keyboardModifiers();
    if (!(modifiers & Qt::ShiftModifier) && !(modifiers & Qt::ControlModifier))
    clearSelection();
    }
 }

I didn't try it yet. Is the only solution or is there any easier way?

score 17 · Answer 1 · answered Dec 02 '08 at 19:44

17

Dusty is almost correct. But the itemSelectionChanged signal will not tell you which item is selected.

QList<QTreeWidgetItem *> QTreeWidget::selectedItems() const

will give you the selected item(s).

So, connect a slot to the itemSelectionChanged signal, then call selectedItems() on the tree widget to get the selected item(s).

answered Dec 02 '08 at 19:44

Thomas Watnedal

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Yes, you are correct. It even says so in the documentation that I linked to. Nice catch. – Dusty Campbell Dec 04 '08 at 17:41

score 4 · Accepted Answer · answered Dec 05 '08 at 15:55

4

Using the itemClicked() signal will miss any selection changes made using the keyboard. I'm assuming that's a bad thing in your case.

answered Dec 05 '08 at 15:55

Parker Coates

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it's perfect, I only need to click on the QTreeWidget :) – JuanDeLosMuertos Dec 08 '08 at 22:51

score 3 · Answer 3 · edited Apr 06 '15 at 15:01

3

you can simply use this :

QString word = treeWidget->currentItem()->text(treeWidget->currentColumn());

to get your text in the variable word.

edited Apr 06 '15 at 15:01

Andy

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answered Apr 06 '15 at 14:57

Sofiane

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score 1 · Answer 4 · answered Dec 02 '08 at 19:37

1

According to the documentation here it appears that you should connect the QTreeWidget itemSelectionChanged() signal to a slot in your class. That will tell you which QTreeWidgetItem was selected which is what I believe you want.

answered Dec 02 '08 at 19:37

Dusty Campbell

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score 0 · Answer 5 · answered Dec 02 '08 at 19:56

0

ooops, I've solved simply using this:

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

however thanks for replies :D

answered Dec 02 '08 at 19:56

JuanDeLosMuertos

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How can I find the selected item in a QTreeWidget?

5 Answers5

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