how to add children to the QTree Widget

ManiRon

@mrjj What is my doubt is i want to add N number of children to a toplevelitem and one child to each child ? How can i add N Number of childern first

mrjj

@ManiRon
Its a list of QTreeWidgetItems * ( pointers)
So you must add them to a QList then give QList to tree.
Its just a function to add multiple items at once.


// top one
    QTreeWidgetItem *treeItemROOT = new QTreeWidgetItem(ui->treeWidget);
    treeItem->setText(0, name);
    treeItem->setText(1, description);

// first child
    QTreeWidgetItem *treeItem = new QTreeWidgetItem();
    treeItem->setText(0, name);
    treeItem->setText(1, description);

    treeItemROOT ->addChild(treeItem); // add child to the root

ManiRon

@mrjj said in how to add children to the QTree Widget:

treeItem

thats what can u give any example code for that "Its a list of QTreeWidgetItems * ( pointers)
So you must add them to a QList then give QList to tree."

mrjj

@ManiRon
QList<QTreeWidgetItem> mylist;
mylist.append( new QTreeWidgetItem); // might want to set some text also
..
...
call addChildren with mylist.

However, it wont help you build the tree, just other way of adding more than one item at a time.

ManiRon

@mrjj

My idea was to insert a list of data as a children to a toplevelitem

ManiRon

@mrjj

I gave like this QList<QTreeWidgetItem>m_Data;
m_Data.append(new QTreeWidgetItem);

it throwed error saying

error: no matching function for call to 'QList<QTreeWidgetItem>::append(QTreeWidgetItem*)'
m_Data.append(new QTreeWidgetItem);
^

mrjj

Hi
List must be of pointers.
QList<QTreeWidgetItem *>
(u missed the *)

ManiRon

@mrjj

Now I gave like this sir,

QList<QTreeWidgetItem*>m_Data;
m_Data.append(new QTreeWidgetItem);

QString Data = 0;

for(int i=1;i<3;i++)
{
Data = QString("SubItem"+QString::number(i));
m_Data.append(Data.toLatin1().constData());
item->addChildren(m_Data);
}

it throws error
error: no matching function for call to 'QList<QTreeWidgetItem*>::append(const char*)'
m_Data.append(Data.toLatin1().constData());
^

mrjj

hi
well u try to add strings to it.
m_Data.append(Data.toLatin1().constData());
and it wants a QTreeWidgetItem *

I think you mean something like

for(int i=1;i<3;i++)
{
Data = QString("SubItem"+QString::number(i));
m_Data.append(Data.toLatin1().constData());
QTreeWidgetItem* item2=new QTreeWidgetItem();
// set text etc on item
m_Data.append(item2);
item->addChildren(m_Data);
}

but why do it liek that since u new it there anyway so just add it directly ?

mrjj

How are you trying to add it ?

aaa
  bbb
     ccc

or

aaa
 bbbb
ccc
 ddd

ManiRon

This post is deleted!

ManiRon

@mrjj

Something like this , top level item = aaaa

children = bbbb,
cccc,
dddd,
eeee,
and child of eeee is ffff

mrjj

@ManiRon
Ok.
Nothing odd then :)
Then you just need to keep aaaa pointer around and
eeee so you can add child to that.

ManiRon

@mrjj sir i tried the way u mentioned but i got like this

my code:

QList<QTreeWidgetItem*>m_Data;
m_Data.append(new QTreeWidgetItem);

QString Data = 0;
for(int i=1;i<3;i++)
{
Data = QString("SubItem"+QString::number(i));
QTreeWidgetItem* item1 =new QTreeWidgetItem(ui->treeWidget);
item1->setText(0,"data1");
m_Data.append(item1);
item1->setText(0,Data.toLatin1().constData());
m_Data.append(item1);
item->addChild(item1);
item1->addChildren(m_Data);
}

mrjj

@ManiRon
hi
seems like blank texts. also i dont see u new item.??
anyway, that loop looks so messy and hard to read
if you use functions, it can look like this

QTreeWidgetItem * addTreeRoot(QTreeWidget* treeWidget, QString name, QString description) {
    QTreeWidgetItem *treeItem = new QTreeWidgetItem(treeWidget);
    treeItem->setText(0, name);
    treeItem->setText(1, description);
    return treeItem;
}

QTreeWidgetItem * addTreeChild(QTreeWidgetItem *parent,QString name, QString description) {
    QTreeWidgetItem *treeItem = new QTreeWidgetItem();
    treeItem->setText(0, name);
    treeItem->setText(1, description);
    parent->addChild(treeItem);
    return treeItem;
}
--

QTreeWidgetItem* root=addTreeRoot(ui->treeWidget,"ROOT","text");
addTreeChild(root,"bbbb","text");
addTreeChild(root,"ccc","text");
addTreeChild(root,"dddd","text");
QTreeWidgetItem* last=addTreeChild(root,"eeee","text");

addTreeChild(last,"eeeee","text"); // notice last as parent

alt text

ManiRon

@mrjj i am not getting sir,
how i will declare the these functions?

mrjj

@ManiRon
hi
Just paste them into cpp file. they are just free functions.

alt text

ManiRon

@mrjj errors came

JonB

@ManiRon
Look at your line #100. What in the world is the -- there?? You really ought be able to do this sort of thing for yourself....

ManiRon

@JonB I removed it sir, Same error coming