QItemDelegate with custom widgets
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26-12-2019 - |
Question
I'm having problems with my QTableView
and QItemDelegate
classes. For one column my delegate creates a simple combo box and everything works just fine. For my 2nd column I need a widget that has two combo boxes in a single widget.
I've written the following code in my QItemDelegate
, just to be clear this only shows code for my 2nd column, the one that doesn't work. The other simple Combo-box isn't shown as it works fine:
QWidget *UserDefinedUnitsDelegate::createEditor(QWidget *parent,const QStyleOptionViewItem & option ,const QModelIndex & index ) const
{
//set up a simple widget with a layout
QWidget* pWidget = new QWidget(parent);
QHBoxLayout* hLayout = new QHBoxLayout(pWidget);
pWidget->setLayout(hLayout);
//add two combo boxes to the layout
QComboBox* comboEditor = new QComboBox(pWidget);
QComboBox* comboEditor2 = new QComboBox(pWidget);
//now add both editors to this
hLayout->addWidget(comboEditor);
hLayout->addWidget(comboEditor2);
return pWidget;
}
Now this displays just fine but when I edit it and click elsewhere it doesn't stop editing. Can anyone offer any pointers?
Edit: So i need to call CommitData() and closeEditor() at some point. Can anyone offer pointers on where to call these?
Thanks.
Solution
You can keep the editor widget as a member of class and emit commitData when the current index of one of the comboboxes has changed. So you can connect currentIndexChanged(int) to a slot and emit commitData from there:
QWidget *UserDefinedUnitsDelegate::createEditor(QWidget *parent,const QStyleOptionViewItem & option ,const QModelIndex & index ) const
{
//set up a simple widget with a layout
pWidget = new QWidget(parent);
QHBoxLayout* hLayout = new QHBoxLayout(pWidget);
pWidget->setLayout(hLayout);
//add two combo boxes to the layout
QComboBox* comboEditor = new QComboBox(pWidget);
QComboBox* comboEditor2 = new QComboBox(pWidget);
connect(comboEditor,SIGNAL(currentIndexChanged(int)),this,SLOT(setData(int)));
connect(comboEditor2,SIGNAL(currentIndexChanged(int)),this,SLOT(setData(int)));
//now add both editors to this
hLayout->addWidget(comboEditor);
hLayout->addWidget(comboEditor2);
return pWidget;
}
void UserDefinedUnitsDelegate::setData(int val)
{
emit commitData(pWidget);
}