Update data to QTreewidget every sec

[saitej]

I want to update from a source after every sec. I have data but am unable to write the new data to the treewidget. Need some help to write the updateData() function.

Header
Source

[jsulm]

What is the problem?
What help do you need?
Where does the data come from?

[saitej]

@jsulm
I am getting the data from another class. i need to display this data. I am able display it the first time but its not autorefreshing so I put this timer and a slot updateData(). I need help in writing this function.

[jsulm]

What help do you need?
Most simple solution: in updateData() you recreate the complete tree (delete all items and then add new items based on current data).

[saitej]

@jsulm
I have done that but the text added by item1->setText(0,"data1"); is not getting deleted. I have used the following code to delete all the items.

for(int i=0;i< ui->treeWidget->topLevelItemCount();++i){
        qDeleteAll(ui->treeWidget->topLevelItem(i)->takeChildren());
}

[mrjj]

hi
Cant
http://doc.qt.io/qt-5/qtreewidget.html#clear
be used ?

[saitej]

@mrjj
Ya it works but the parent item gets closed on every update.

[mrjj]

@saitej
No matter how you remove the items, it cannot
keep open/close status since you remove the items.

[saitej]

@mrjj
so is there a way to get back to the same status as before after the update ?

[mrjj]

@saitej
Hi, not as far as I know. not unless u save it yourself.

[saitej]

@mrjj
ok !! Thanks :)