Question

I’ve been trying to get a tabeView to display one of its columns as comboBoxes. In order to do this, I’ve written the code for a custom delegate:

class comboBoxDelegate(QStyledItemDelegate):

def __init__(self, model, parent=None):
    super(comboBoxDelegate, self).__init__(parent)
    self.parent= parent
    self.model= model

def createEditor(self, parent, option, index):

    if not index.isValid():
        return False

    self.currentIndex=index  

    self.comboBox = QComboBox(parent)
    self.comboBox.setModel(self.model)
    value = index.data(Qt.DisplayRole)
    self.comboBox.setCurrentIndex(value)

    return self.comboBox

def setEditorData(self, editor, index):
    value = index.data(Qt.DisplayRole)
    editor.setCurrentIndex(value)

def setModelData(self, editor, model, index):

    if not index.isValid():
        return False

    index.model().setData(index, editor.currentIndex(), Qt.EditRole)

def paint(self, painter, option, index):
    currentIndex= index.data(Qt.DisplayRole)

    opt= QStyleOptionComboBox()
    opt.rect= option.rect
    currentComboIndex= self.model.createIndex(currentIndex,0)
    opt.currentText= self.model.data(currentComboIndex, Qt.DisplayRole)

    QApplication.style().drawComplexControl(QStyle.CC_ComboBox, opt, painter)

The problem is that when I try it the comboBox doesn’t show any text at first (only once you’ve clicked on it). It seems the currentText property isn’t working. Any help will be appreciated.

Answer 1

I think you should call parent class paint() method. Add:

QStyledItemDelegate.paint(self, painter, option, index)

at the end of the paint method in your class, after the call to drawComplexControl