checkbox and itemdelegate in a tableview

Question

I\'m doing an implementation of a CheckBox that inherits from QitemDelegate, to put it into a QTableView.

the problem is that I get when inserted flush left and I ne

Answer 1

If you are extending the QItemDelegate class, it has a drawCheck() function, what will draw you a nince, centered checkbox. You can use it in the paint() function.

Edit:

Here is an example, assuming you have a class called BooleanEditor, what inherits from QItemDelegate:

void BooleanEditor::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    drawCheck(painter, option, option.rect, index.data().toBool() ? Qt::Checked : Qt::Unchecked);
    drawFocus(painter, option, option.rect);
}

For keeping the checkbox centered when entering the edit mode, you can do something like this:

class BooleanWidget : public QWidget
{
    Q_OBJECT
    QCheckBox * checkBox;

    public:
    BooleanWidget(QWidget * parent = 0)
    {
        checkBox = new QCheckBox(this);
        QHBoxLayout * layout = new QHBoxLayout(this);
        layout->addWidget(checkBox,0, Qt::AlignCenter);
    }

    bool isChecked(){return checkBox->isChecked();}
    void setChecked(bool value){checkBox->setChecked(value);}
};

And in your ItemDelegates createEditor() method return an instance of this BooleanWidget class. In your setModelData() and setEditorData() you can now cast your input widget to this BooleanWidget:

BooleanWidget * widget = qobject_cast(editor);

and then use the is/setChecked method.