I'm sorry but I don't think will compile.
Please provide a minimal, compilable example which shows your problem. E.g

int main (int argc, char **argv) { QApplication app(argc, argv); QTreeWidget treeWidget; QTreeWidgetItem *cities = new QTreeWidgetItem(&treeWidget); cities->setText(0, "Cities"); treeWidget.show(); return app.exec(); }

See http://doc.qt.io/qt-5/qtreewidgetitem.html#details

@MATTK said in Configuring checkbox when using QTreeWidget:

is this a bug or a known issue from Qt Designer?

No, it's 100% intended behaviour. the condition is checked here

You have 2 options:

set the Qt::CheckStateRole for the indexes you want to have a checkbox. In your widget constructor you'd call something like setUnchecked(ui->treeWidget->model()); void setUnchecked(QAbstractItemModel* model, const QModelIndex& parent = QModelIndex()){ if(!model) return; for(int i=0, maxRow=model->rowCount(parent);i<maxRow;++i){ for(int j=0, maxCol=model->columnCount(parent);j<maxCol;++j){ const QModelIndex currIdx = model->index(i,j,parent); model->setData(currIdx,Qt::Unchecked,Qt::CheckStateRole); if(model->hasChildren(currIdx)) setUnchecked(model,currIdx); } } } subclass the delegate to check the flag instead of Qt::CheckStateRole and call something like ui->treeWidget->setItemDelegate(new CheckFlagDelegate(this)); in your widget constructor class CheckFlagDelegate : public QStyledItemDelegate{ Q_OBJECT Q_DISABLE_COPY(CheckFlagDelegate) public: explicit CheckFlagDelegate(QObject* parent = Q_NULLPTR) : QStyledItemDelegate(parent){} protected: void initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const Q_DECL_OVERRIDE{ QStyledItemDelegate::initStyleOption(option,index); if(index.model()->flags(index) & Qt::ItemIsUserCheckable) option->features |= QStyleOptionViewItem::HasCheckIndicator; } };

Since the functionality is defined in a QObject (the delegate) and not in a QWidget this is not something designer can and probably ever will manage

@Rohith
no it's not.
You would have to implement your custom QDialog subclass.
Which shouldn't be much of an effort.

Można użyć modelu proxy, który będzie interpretował jakieś dane (np. "0" i "1") jako checkbox, np.

class MyProxy : public QIdentityProxyModel { public: MyProxy(QObject* parent) : QIdentityProxyModel(parent) {} QVariant data(const QModelIndex& index, int role) const override { if (role == Qt::CheckStateRole && index.column() == 0) { QString str_value = QIdentityProxyModel::data(index, Qt::DisplayRole).toString(); return (str_value == "1") ? Qt::Checked : Qt::Unchecked; } return QIdentityProxyModel::data(index, role); } bool setData(const QModelIndex& index, const QVariant& value, int role) override { if (role == Qt::CheckStateRole && index.column() == 0) { QString str_value = (value.toInt() == Qt::Checked) ? "1" : "0"; return QIdentityProxyModel::setData(index, str_value, Qt::EditRole); } else return QIdentityProxyModel::setData(index, value, role); } Qt::ItemFlags flags(const QModelIndex& index) const override { Qt::ItemFlags f = QIdentityProxyModel::flags(index); if (index.column() == 0) f |= Qt::ItemIsUserCheckable; return f; } };

oczywiście numer kolumny i dane rozpoznawane jako "zaznaczony" można sobie dostosować.
Takiego modelu można użyć potem tak:

QSqlTableModel* model = new QSqlTableModel(parent, database); MyProxy* proxy = new MyProxy(parent); proxy->setSourceModel(model); tableView->setModel(proxy);

@medyakovvit Yeah, that woks. Thanks :)

@Devopia53 Thanks, the checkboxes are displayed at least but selection by mouse is very difficult. I don't know why. UPDATE I comment out li->flags() and things works fine.

@maximo
Hi
It creates a new Header that draws a check box image on itself since its not possible to insert a real widget.
It then response to mouse press to make the image work as a real check box.

it checks with
if (logicalIndex == 0)

so I think it only paints this in first column.

@Brad-M I made it in Designer. I double checked the id box. It has ckbox. Sorry I am just now getting back to you. It has been busy at work this week.

Hi

try to use Binding to your CheckBox:

Binding { target: checkbox property: 'checked' value: checkboxenable }

where checkboxenable is role in your model

Hi,

Nothing really wrong, QWidget using style sheets are rendered by a special style. With style sheets you can customize things that might not be done with the native style.

No there is not at the moment. But as I said earlier this was based on some code from here. I tested it too, and if you try to add checkboxes just in the way I have done in the code above and compile, you can clearly see what I am talking about. Just make sure you browse to a folder that contains only images of the dimensions I specified.

Hi,

have a look to QWidget::setStyleSheet()

Hi and welcome to devnet,

Since you are painting things yourself, you would also need to handle the mouse interaction yourself. Painting a QCheckBox is not the same has having an actual checkbox widget.