[SOLVED]QTreeView setIndexWidget() for child nodes.

Sam

Hi,
How can i add a QLabel/QPushButton/CustomWidget to a child node in QTreeView. I am able to get the same with QTreeWidget by using setItemWidget().

I tried the following code

@QStandardItem *children = new QStandardItem();
QStandardItem *parent = model->item(r,c);
parent->appendRow(children);

QModelIndex index = model->indexFromItem(children);
ui->treeView->setIndexWidget(index,myLabel);@

Thanks.

qxoz

Did you try do this?

last time when i were needed something like this, i overloaded QItemDelegate::paint() method.

Sam

Hi qxoz,

How can i add a QLabel / CustomWidget in QItemDelegate::paint() function ? I can use a QPainter to drawRect , Text but how to display a QLabel or a custom widget ?

Thanks.

andre

[quote author="Soumitra" date="1335956895"]Hi qxoz,

How can i add a QLabel / CustomWidget in QItemDelegate::paint() function ? I can use a QPainter to drawRect , Text but how to display a QLabel or a custom widget ?

Thanks.[/quote]
You can't. That function is for painting, not for creating or setting widgets.

Sam

[quote author="Andre" date="1335958493"]You can't. That function is for painting, not for creating or setting widgets.

[/quote]Thanks Andre ,yes that function is only used for painting. I am trying to create a table with expanding and collapsing rows . So inorder to achieve that i am using a QTreeView and trying to set the setIndexWidget(). I am able to get some information from "this":http://qt-project.org/forums/viewthread/14917 and "this":http://qt-project.org/forums/viewthread/15909 but using QTreeWidget. I need to implement using QTreeView.

This is the "image":http://imageshack.us/photo/my-images/692/capturenu.png/

qxoz

Look at:
"link1":http://stackoverflow.com/questions/3656306/how-to-put-an-image-and-a-qprogressbar-inside-a-qtableview
"link2":http://www.qtcentre.org/threads/31588-QCombobox-as-QTableView-delegate

There are some information

Sam

Hi qxoz,

Thanks for the links . I'll look into the code. BTW do you know how to create a QTableView with Expanding and Collapsing row. I am looking just for an approach to get this one. I tried this with QTreeWidget but need to implement it with QTreeView and set the tableView to the child nodes.

Thanks for your time :)

Sam

Hi qxoz,

I have gone through the above links, but still i didnt get the solution about how to add custom widget to the child nodes of QTreeView. I changed my code as per what is specified on those two links.
I think its will be good if i can use setIndexWdget(). It will be really helpful someone can help me on how to setIndexWidget() for child nodes in QTreeView.

Thanls

stima_ua

@
QTreeWidgetItem *parent = new QTreeWidgetItem;
myThreeWidget->setItemWidget(parent, column, widget);
myThreeWidget->addTopLevelItem(parent);

QTreeWidgetItem *child = new QTreeWidgetItem(parent); //<<--Set parent
myThreeWidget->setItemWidget(child, column, widget);
@

Sam

[quote author="stima_ua" date="1336029386"]@
QTreeWidgetItem *parent = new QTreeWidgetItem;
myThreeWidget->setItemWidget(parent, column, widget);
myThreeWidget->addTopLevelItem(parent);

QTreeWidgetItem *child = new QTreeWidgetItem(parent); //<<--Set parent
myThreeWidget->setItemWidget(child, column, widget);
@[/quote]

Hi stima_ua,

Thanks for the code, but unfortunately i need to implement this using QTreeView setIndexWidget() function and not QTreeWidget setItemWidget() function. I have already implemented this using QTreeWidget.

Thanks for your time :)

stima_ua

@
#include <QtGui>
#include <QtCore>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QTreeView view;
QStandardItemModel model;
const int WidgetRole = Qt::UserRole + 1;

view.setModel(&model);

QLabel *parentWidget = new QLabel;
QStandardItem *parent = new QStandardItem;

parentWidget->setText("parent");
parentWidget->setAutoFillBackground(true);
//For use ss you should reimplement paint;
//parentWidget->setStyleSheet("QLabel#parentWidget { background: red; }");

model.appendRow(parent);
parent->setData(qVariantFromValue((void*) parentWidget), WidgetRole);
parent->setData(Qt::Checked, Qt::CheckStateRole);
view.setIndexWidget(parent->index(), parentWidget);

QStandardItem *child = new QStandardItem;
QLabel *childWidget = new QLabel;

parent->setChild(0, child);

childWidget->setText("child");
childWidget->setAutoFillBackground(true);

child->setData(qVariantFromValue((void*) childWidget), WidgetRole);
child->setData(Qt::Checked, Qt::CheckStateRole);

view.setIndexWidget(child->index(), childWidget);

view.show();

return a.exec&#40;&#41;;

}

@

You can. But better use treewidget.

Sam

Hi stima_ua,

This is exactly what i was looking for. Thanks a lot :)

Regards
Soumitra.

Edit: Finally I got something that looks like this :-

!http://img138.imageshack.us/img138/583/captureecb.png(exapandCollapse)!