missing item delegates

sviz/item_delegates.py

+from PyQt4.Qt import QStyledItemDelegate, QWidget, QModelIndex, QVariant, QStyleOptionViewItem
+from PyQt4.QtGui import QLineEdit
+from PyQt4 import QtCore
+
+
+class ValueItemDelegate(QStyledItemDelegate):
+    """
+    A version of the QStyledItemDelegate which ignores setEditorData and only sets the editor data during creation of
+    the editor.
+    """
+    def __init__(self, parent=None):
+        QStyledItemDelegate.__init__(self, parent)
+
+    def setEditorData(self, widget, model_idx):
+        # type: (QWidget, QModelIndex) -> None
+        pass
+
+    def createEditor(self, widget, style_option, model_idx):
+        # type: (QWidget, QStyleOptionViewItem, QModelIndex) -> object
+        editor = QStyledItemDelegate.createEditor(self, widget, style_option, model_idx)
+        editor.setText(model_idx.data(QtCore.Qt.EditRole).toString())
+        return editor