[SOLVED] Cannot add child items in Root Tree entries

DeanQt

Consider the following Addroot and Addchild functions of a QTreeWidget object:

@void Dialog::AddRoot(QString name, QString Description){

        QTreeWidgetItem *itm = new QTreeWidgetItem(ui->treeWidget);
        itm->setText(0,name);
        itm->setText(1,Description);
        ui->treeWidget->addTopLevelItem(itm);
        AddChild(itm,"One", "Hello");
        AddChild(itm,"Two", "World");

}

void Dialog::AddChild(QTreeWidgetItem *parent, QString name, QString Description){

        QTreeWidgetItem *itm = new QTreeWidgetItem(ui->treeWidget);
        itm->setText(0,name);
        itm->setText(1,Description);
        ui->treeWidget->addTopLevelItem(itm);
        parent->addChild(itm);

}
@

Running this tree view still shows every entry as a root and not a child, no matter what.

According to the same online tutorial, to fix this, the author merely replaces
@QTreeWidgetItem *itm = new QTreeWidgetItem(ui->treeWidget);@ with @QTreeWidgetItem *itm = new QTreeWidgetItem(ui->treeWidget);@ (Line 13) and it works. I tried the same identical step and it still doesnt fix the problem of only roots showing. I think it has to do with Qt version, is this true? Did the recent releases change the way Tree's are modelled?

SGaist

Hi,

In both Add functions, you do a ui->treeWidget->addTopLevelItem.

Shouldn't AddChild be

@
QTreeWidgetItem *itm = new QTreeWidgetItem(parent);
itm->setText(0,name);
itm->setText(1,Description);
@

?

bhamuryen

Hi,

line 13 should be
@ QTreeWidgetItem *itm = new QTreeWidgetItem();@
or
@ QTreeWidgetItem *itm = new QTreeWidgetItem;@
not
@ QTreeWidgetItem *itm = new QTreeWidgetItem(ui->treeWidget);@

and you need to remove line 16.

so this code must be like this
@
void Dialog::AddChild(QTreeWidgetItem *parent, QString name, QString Description){

        QTreeWidgetItem *itm = new QTreeWidgetItem();
        itm->setText(0,name);
        itm->setText(1,Description);
        parent->addChild(itm);

}@

DeanQt

Aha, it works when removing line 16.

Thanks guys.

SGaist

You're welcome !

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