Apply parameter template button to scenario section

Author: mrvisscher

activity_browser/app/actions/__init__.py

@@ -95,3 +95,4 @@
 from .migrations_install import MigrationsInstall
 from .pyside_upgrade import PysideUpgrade
 from .metadatastore_open import MetaDataStoreOpen
+from .save_parameters_to_excel import SaveParametersToExcel

activity_browser/app/actions/save_parameters_to_excel.py

@@ -0,0 +1,39 @@
+import os
+
+import pandas as pd
+
+from qtpy import QtWidgets
+
+from activity_browser.app import application
+from activity_browser.app.actions.base import ABAction, exception_dialogs
+from activity_browser.bwutils.utils import Parameters
+
+
+class SaveParametersToExcel(ABAction):
+    """
+    ABAction to export database(s) to Excel format (.xlsx).
+    """
+    text = "Save parameters to Excel (.xlsx)"
+    tool_tip = "Save parameters to Excel format"
+
+    @classmethod
+    @exception_dialogs
+    def run(cls, file_path: str = None):
+        if file_path is None:
+            suggestion = os.path.expanduser("~/parameters.xlsx")
+
+            file_path, _ = QtWidgets.QFileDialog.getSaveFileName(
+                parent=application.main_window,
+                caption=f'Export parameters to Excel',
+                dir=suggestion,
+                filter='Excel spreadsheet (*.xlsx);; All files (*.*)'
+            )
+
+        if not file_path:
+            return
+
+        data = [p[:3] for p in Parameters.from_bw_parameters()]
+        df = pd.DataFrame(data, columns=["Name", "Group", "default"]).set_index("Name")
+        df.to_excel(file_path)
+
+        os.startfile(file_path)

activity_browser/app/pages/calculation_setup/scenario_section.py

@@ -25,6 +25,9 @@ def __init__(self, parent=None):
         self._scenario_dataframe = pd.DataFrame()
 
         # set up the control buttons
+        self.get_template_btn = app.actions.SaveParametersToExcel.get_QButton()
+        self.get_template_btn.setText("Parameter template...")
+
         self.table_btn = QtWidgets.QPushButton("Add scenarios...", self)
 
         self.save_scenario = QtWidgets.QPushButton("Save to file...", self)
@@ -63,6 +66,7 @@ def __init__(self, parent=None):
 
         tool_row.addWidget(widgets.ABLabel.demiBold("  Scenarios:", self))
         tool_row.addStretch()
+        tool_row.addWidget(self.get_template_btn)
         tool_row.addWidget(self.table_btn)
         tool_row.addWidget(self.save_scenario)
         tool_row.addWidget(self.group_box)