QDataWidgetMapper to map multiple columns to multiple properties of single custom widget

zxpatric

Understand that currently there is one-one limitation to QDataWidgetMapper::addMapping but any workaround would also be appreciated. Thanks!

For example, there are needs of mapping to both the enabled and text property of a QPushButton but only the latter one (text) will take effect if I did following.

    self.mapper.addMapping(self.btnLoad, 7, b'enabled')
    self.mapper.addMapping(self.btnLoad, 8, b'text')

void QDataWidgetMapper::addMapping(QWidget *widget, int section)
Adds a mapping between a widget and a section from the model. The section is a column in the model if the orientation is horizontal (the default), otherwise a row.

For the following example, we assume a model myModel that has two columns: the first one contains the names of people in a group, and the second column contains their ages. The first column is mapped to the QLineEdit nameLineEdit, and the second is mapped to the QSpinBox ageSpinBox:

QDataWidgetMapper *mapper = new QDataWidgetMapper;
mapper->setModel(myModel);
mapper->addMapping(nameLineEdit, 0);
mapper->addMapping(ageSpinBox, 1);
Notes:

If the widget is already mapped to a section, the old mapping will be replaced by the new one.
Only one-to-one mappings between sections and widgets are allowed. It is not possible to map a single section to multiple widgets, or to map a single widget to multiple sections.

mrjj

Hi
Im just thinking out loud, but did you try with 2 QDataWidgetMapper for same model ?
I dont know if that is ok/works but since QDataWidgetMapper keeps the "bindings"
it might work.

zxpatric

It did work! Thanks!

Not sure about the penalties but in case anyone is interested

```

self.mapper = QDataWidgetMapper(self)
        self.mapper.setModel(model)
        self.mapper.addMapping(self.btnLoad, 7, b'enabled')

        self.mapper2 = QDataWidgetMapper(self)
        self.mapper2.setModel(model)
        self.mapper2.addMapping(self.btnLoad, 8, b'text')

        self.mapper.toFirst()
        self.mapper2.toFirst()

SGaist

Hi,

There's currently no possible workaround with a single QDataWidgetMapper. The internal logic does not handle multiple "same source widget".