retain settings in FC reader dialog

src/gui_qt/io/fcbatchreader.py

@@ -28,6 +28,12 @@ class QFCReader(QtWidgets.QDialog, Ui_FCEval_dialog):
 
         self.listWidget.installEventFilter(self)
 
+    def __call__(self, path=None):
+        if path is None:
+            path = pathlib.Path().home()
+        self.path = path
+        self.listWidget.clear()
+
     def eventFilter(self, src: QtCore.QObject, evt: QtCore.QEvent) -> bool:
         # intercept key press in listwidget to allow deletion with Del
         if evt.type() == QtCore.QEvent.Type.KeyPress:
@@ -82,6 +88,7 @@ class QFCReader(QtWidgets.QDialog, Ui_FCEval_dialog):
 
     def accept(self):
         items = [self.listWidget.item(i).text() for i in range(self.listWidget.count())]
+        print(items)
         if items:
             with busy_cursor():
                 self.read(items)
@@ -116,6 +123,7 @@ class QFCReader(QtWidgets.QDialog, Ui_FCEval_dialog):
 
         ret_vals = []
         ret_vals.extend(fc_eval.get_parameter(path=self.label.text(), kind='temp', parameter=save_variables))
+        print(ret_vals)
 
         grp = ''
         if not self.graph_checkbox.isChecked():

src/gui_qt/main/mainwindow.py

@@ -62,6 +62,7 @@ class NMRMainWindow(QtWidgets.QMainWindow, Ui_BaseWindow):
         self.fitresult_dialog = None
         self.eval = None
         self.editor = None
+        self.fc_reader = None
 
         self.logtext = QTextHandler(self)
         logger.addHandler(self.logtext)
@@ -264,14 +265,15 @@ class NMRMainWindow(QtWidgets.QMainWindow, Ui_BaseWindow):
 
     @QtCore.pyqtSlot(name='on_actionOpen_FC_triggered')
     def read_fc(self):
-        reader = QFCReader(path=self.path, parent=self)
-        reader.add_graphs(self.management.graphs.list())
-        reader.data_read.connect(self.management.add_new_data)
-        reader.exec()
+        if self.fc_reader is None:
+            self.fc_reader = QFCReader(path=self.path, parent=self)
+            self.fc_reader.data_read.connect(self.management.add_new_data)
+        else:
+            self.fc_reader(path=self.path)
+        self.fc_reader.add_graphs(self.management.graphs.list())
+        self.fc_reader.exec()
 
-        self.path = reader.path
-
-        del reader
+        self.path = self.fc_reader.path
 
     @QtCore.pyqtSlot(name='on_actionPrint_triggered')
     def print(self):