PySide PyQt QDataWidgetMapper - model-view-controller

Question

I try to connect a QtGui.QPlainTextEdit to a Model with QDataWidgetMapper.
I dont get any errors, just nothing in the TextEdit.
I dont get it and i cant find good example Code.
Here is some ExampleCode.
I really hope that someone could help me.
from PySide import QtCore, QtGui
import sys
class ComponentsListModel(QtCore.QAbstractListModel):
def __init__(self, components=[], parent = None):
super(ComponentsListModel, self).__init__(parent=None)
self.components = components
self.list = parent
def rowCount(self, parent):
return len(self.components)
def data(self, index, role):
row = index.row()
if role == QtCore.Qt.DisplayRole:#index.isValid() and
value = self.components[row]
return value
class MainWindow(QtGui.QWidget):
def __init__(self):
super(MainWindow, self).__init__()
self._build_ui()
def _build_ui(self):
self.layout = QtGui.QVBoxLayout()
self.listView = QtGui.QListView()
self.model = ComponentsListModel(components = ['1', '2', '3'])
self.listView.setModel(self.model)
self.text = QtGui.QPlainTextEdit()
self.layout.addWidget(self.listView)
self.layout.addWidget(self.text)
self.setLayout(self.layout)
self._mapper = QtGui.QDataWidgetMapper(self)
self._mapper.setModel(self.model)
self._mapper.setSubmitPolicy(QtGui.QDataWidgetMapper.AutoSubmit)
self._mapper.addMapping(self.text, 0)
self._mapper.toFirst()
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
app.setStyle('Plastique')
mySW = MainWindow()
mySW.show()
sys.exit(app.exec_())

Answer 1

You will need to add a condition for Qt.EditRole in your data function inside ComponentsListModel class
if role == Qt.EditRole:
value = self.components[row]
return value