bug-fixer (#40)

fixes #32, #34, #39

Co-authored-by: Dominik Demuth <dominik.demuth@physik.tu-darmstadt.de>
Reviewed-on: IPKM/nmreval#40

src/gui_qt/lib/listwidget.py

@@ -0,0 +1,20 @@
+from ..Qt import QtWidgets, QtGui, QtCore
+
+
+class QListWidgetSelect(QtWidgets.QListWidget):
+    """
+    Extension of QListWidget to change the check state of all selected QListWidgetItems with space key
+    """
+
+    def __init__(self, parent=None):
+        super().__init__(parent=parent)
+
+    def keyPressEvent(self, evt: QtGui.QKeyEvent):
+        if evt.key() == QtCore.Qt.Key.Key_Space:
+            for idx in self.selectedIndexes():
+                item = self.itemFromIndex(idx)
+                cs = item.checkState()
+                item.setCheckState(QtCore.Qt.CheckState.Unchecked if cs == QtCore.Qt.CheckState.Checked
+                                   else QtCore.Qt.CheckState.Checked)
+        else:
+            super().keyPressEvent(evt)