Hi all,
I am trying to mimic how the addressee widgets (“To” and “CC”) work in
email clients but can’t get it right.
Upon valid input I would like to add a new row to teh list for
additional input.
If the input is not found in the completer’s list O would like to keep
the editor open and reset it to an empty value.
I am using a QListView with a delegate that opens a QLineEdit with a
completer to check the input against a set list of strings.
With the below code I currently get “editing failed” errors when the
input is incorrect (though the editor does stay open as desired).
With a valid input however the code adds two new rows instead of just one.
If somebody could have a look and offer some advise that would be awesome!
Cheers,
frank
|import sys from PySide2 import QtWidgets, QtCore, QtGui class
AddresseeModel(QtGui.QStandardItemModel): def __init__(self, w,
parent=None): super(AddresseeModel, self).__init__(parent) def
itemChanged(self, item): print item super(Model, self).itemChanged(item)
class AddresseeDelegate(QtWidgets.QItemDelegate): is_valid =
QtCore.Signal() is_not_valid = QtCore.Signal(QtCore.QModelIndex) def
__init__(self, users=[], groups=[], parent=None):
super(AddresseeDelegate, self).__init__(parent) self.valid_item_texts =
users + groups def createEditor(self, parent, option, index):
self.editor = QtWidgets.QLineEdit(parent) completer =
QtWidgets.QCompleter(self.valid_item_texts)
completer.setCompletionMode(QtWidgets.QCompleter.InlineCompletion)
self.editor.setCompleter(completer)
self.editor.editingFinished.connect(lambda: self.validate_text(index))
return self.editor def setModelData(self, editor, model, index):
model.setData(index, editor.text()) def validate_text(self, index=None):
if self.editor.text() in self.valid_item_texts: # this is called twice
when input is valid self.is_valid.emit() else:
self.is_not_valid.emit(index) class
AddresseeListView(QtWidgets.QListView): def __init__(self, users=[],
groups=[], parent=None): '''Simple addressee widget.'''
super(AddresseeListView, self).__init__(parent) model =
AddresseeModel(list) self.setModel(model) item = QtGui.QStandardItem('')
# add initial empty row model.appendRow(item)
self.setEditTriggers(QtWidgets.QAbstractItemView.AllEditTriggers)
delegate = AddresseeDelegate(users, groups)
self.setItemDelegate(delegate)
delegate.is_valid.connect(self.add_and_edit)
delegate.is_not_valid.connect(self.keep_editor_open) def
add_and_edit(self): '''Add a new row and open editor''' print 'adding
row' new_item = QtGui.QStandardItem('') self.model().appendRow(new_item)
self.edit(self.model().indexFromItem(new_item)) def
keep_editor_open(self, index): '''Keep editor open at given index'''
self.edit(index) if __name__ == '__main__': app =
QtWidgets.QApplication(sys.argv) users = ['person A', 'person B',
'person C'] groups = ['group A', 'group B', 'group C'] list =
AddresseeListView(users, groups) list.show() list.raise_() app.exec_() |
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