Edit Domain: add custom format

Orange/widgets/data/oweditdomain.py

@@ -6,6 +6,8 @@
 
 """
 from __future__ import annotations
+
+import re
 import warnings
 from xml.sax.saxutils import escape
 from itertools import zip_longest, repeat, chain, groupby
@@ -1526,14 +1528,22 @@ class TimeVariableEditor(VariableEditor):
     def __init__(self, parent=None, **kwargs):
         super().__init__(parent, **kwargs)
         form = self.layout().itemAt(0)
+        self.custom_text = ""
+        self.have_date = 0
+        self.have_time = 0
 
         self.format_cb = QComboBox()
         for item, data in [("Detect automatically", (None, 1, 1))] + list(
             Orange.data.TimeVariable.ADDITIONAL_FORMATS.items()
-        ):
+        ) + [("Custom format", (self.custom_text, self.have_time,
+                                self.have_date))]:
             self.format_cb.addItem(item, StrpTime(item, *data))
         self.format_cb.currentIndexChanged.connect(self.variable_changed)
+        self.custom_edit = QLineEdit()
+        self.custom_edit.setPlaceholderText("%Y-%m-%d %H:%M:%S")
+        self.custom_edit.textChanged.connect(self._on_custom_change)
         form.insertRow(2, "Format:", self.format_cb)
+        form.insertRow(3, "Custom format:", self.custom_edit)
 
     def set_data(self, var, transform=()):
         super().set_data(var, transform)
@@ -1555,6 +1565,18 @@ def get_data(self):
             tr.insert(0, self.format_cb.currentData())
         return var, tr
 
+    def _on_custom_change(self):
+        self.custom_text = self.custom_edit.text()
+        date_pat = r"%(-?)d|%(b|B)|%(-?)m|%(y|Y)|%(-?)j|%(-?)U|%(-?)W|%(a|A)|%w"
+        time_pat = r"%(-?)H|%(-?)I|%p|%(-?)M|%(-?)S|%f"
+        pattern1 = re.compile(date_pat)
+        pattern2 = re.compile(time_pat)
+        self.have_date = int(bool(pattern1.search(self.custom_text)))
+        self.have_time = int(bool(pattern2.search(self.custom_text)))
+        if self.format_cb.currentText() != "Custom format":
+            self.format_cb.setCurrentIndex(-1)
+        self.format_cb.emit()
+
 
 def variable_icon(var):
     # type: (Union[Variable, Type[Variable], ReinterpretTransform]) -> QIcon
@@ -3080,4 +3102,5 @@ def column_str_repr_string(
 
 
 if __name__ == "__main__":  # pragma: no cover
-    WidgetPreview(OWEditDomain).run(Orange.data.Table("iris"))
+    WidgetPreview(OWEditDomain).run(Orange.data.Table(
+        "/Users/ajda/Desktop/test.csv"))