feat(GroupBox): add get_alignment method

prettyqt/widgets/groupbox.py

@@ -2,7 +2,7 @@
 
 from prettyqt import constants, widgets
 from prettyqt.qt import QtWidgets
-from prettyqt.utils import get_repr
+from prettyqt.utils import InvalidParamError, get_repr
 
 
 class GroupBox(widgets.WidgetMixin, QtWidgets.QGroupBox):
@@ -28,9 +28,27 @@ def __repr__(self):
     def set_title(self, title: str):
         self.setTitle(title)
 
-    def set_alignment(self, alignment):
+    def set_alignment(self, alignment: constants.HorizontalAlignmentStr):
+        """Set the title alignment of the groupbox.
+
+        Args:
+            alignment: title alignment for the groupbox
+
+        Raises:
+            InvalidParamError: alignment does not exist
+        """
+        if alignment not in constants.H_ALIGNMENT:
+            raise InvalidParamError(alignment, constants.ALIGNMENTS)
         self.setAlignment(constants.H_ALIGNMENT[alignment])
 
+    def get_alignment(self) -> constants.HorizontalAlignmentStr:
+        """Return current title alignment.
+
+        Returns:
+            title alignment
+        """
+        return constants.H_ALIGNMENT.inverse[self.alignment()]
+
     def set_enabled(self, state):
         for widget in self.layout():
             widget.setEnabled(state)
@@ -39,7 +57,7 @@ def set_enabled(self, state):
 if __name__ == "__main__":
     app = widgets.app()
     widget = GroupBox()
-    ly = widgets.BoxLayout()
+    ly = widgets.HBoxLayout()
     ly += widgets.RadioButton("test")
     widget.set_layout(ly)
     widget.show()