How can we save user date to the QTreeWidgetItem?

[yanj20]

In MFC for CTreeControl we have function call SetItemData to set the user
data to a tree items. Like that how can we set the user data to QTreeWidget
? . Can any one help me with the simple code snapshot ?

[pornographer]

看了下好像由函数的

先从qtreewidget 获得qtreewidgetitem的指针

然后用这函数
void QTreeWidgetItem::setData ( int column, int role, const QVariant & value )

这个具体我没用过 随便yy一下

[bsr2009]

楼上的方法可以试一下.LZ的平台是用在哪里的?S60? CE?

[Lutx]

setData(column, Qt::UserRole, yourdata);

[yanj20]

Thank you,I work on ubuntu linux,and i have try the setData function,but it didn't work.

Q_DECLARE_METATYPE(JOB*) //JOB is user defined data structure
QTreeWidget *pTree = new QTreeWidget();
JOB *pJob = new JOB();
QTreeWidgetItem* item = QTreeWidgetItem(pTree);
item->setText(0,"Test Text");
QVariant var;
qVariantSet(var,pJob);
item->setData(0,QAbstractItemModel::UserRole,var);

like the above method,application cann't save the pJob,Can any one help me with the simple code snapshot ?

[dyw]

可以用setData方法设置任意的数据，除了用Qt::UserRole外，你还可以自己定义Role...

[Aisy_D]

Well, there are sure ways to add your extra customer data to your Qtreewidget.
one of the common approachs is that create your own class which inherits "QDataModel", i.e. QDirModel , and then reimplement public function "columnCount ( const QModelIndex & parent = QModelIndex() ) const" to set up extra columns for holding your custmoer data, and then reimplement two functions "data()" , "setData()" to showi or manuplate your own data, another function headerData() for modifying the showing text on the header row of Qtreewidget, I'v just got this cutomer data work in my demo "BatchRename" ,take a look at the screen snap followed:

[Aisy_D]

I will upload this demo's source-archive to somewhere and share the URL's link for everybody to download it.

[yanj20]

thanks Aisy_D,so would you please show me the subparagraph code?

[yanj20]

struct JOB{
name;
id;
};

QStringList subfileList;
JOB *pJob = new JOB();; //user data struct
subfileList.append(pJob.name);

//here we save the user data to the var
QTreeWidgetItem *childItem = new QTreeWidgetItem(subfileList);
QVariant var(QVariant::UserType, pJob);
childItem->setData(0,Qt::UserRole,var);
parentItem->addChild(childItem); //here we add the childItem to the QTreeWidget

//here we try to get the data saved in var that connected to the Item
JOB *savedObj = (static_cast<JOB*>(var.data())); //???I couldn't get the values

[Aisy_D]

the sample demo "interview" which locate at $QTDIR$\demos\interview\interview.exe is your friend, please take time to understand it....