moninj: add load/save config

artiq/dashboard/moninj.py

@@ -1,15 +1,19 @@
 import asyncio
 import logging
 import textwrap
+import os
 from collections import namedtuple
 
 from PyQt5 import QtCore, QtWidgets, QtGui
 import pyqtgraph as pg
 
+from sipyco import pyon
+
 from artiq.coredevice.comm_moninj import CommMonInj, TTLOverride, TTLProbe
 from artiq.coredevice.ad9912_reg import AD9912_SER_CONF
-from artiq.gui.tools import LayoutWidget
+from artiq.gui.tools import LayoutWidget, get_open_file_name, get_save_file_name
 from artiq.gui.models import DictSyncTreeSepModel
+from artiq.tools import exc_to_warning
 
 
 logger = logging.getLogger(__name__)
@@ -964,6 +968,14 @@ class MonInjDock(QtWidgets.QDockWidget):
 
         layout = LayoutWidget()
         self.setWidget(layout)
+
+        self._current_dir = os.getcwd()
+        self._menu_btn = QtWidgets.QPushButton()
+        self._menu_btn.setIcon(
+            QtWidgets.QApplication.style().standardIcon(
+                QtWidgets.QStyle.SP_FileDialogStart))
+        layout.addWidget(self._menu_btn, 0, 0)
+
         self._channel_model = Model({})
         self.add_channel_dialog = _AddChannelDialog(self, self._channel_model)
         self.add_channel_dialog.accepted.connect(
@@ -974,11 +986,22 @@ class MonInjDock(QtWidgets.QDockWidget):
             QtWidgets.QApplication.style().standardIcon(
                 QtWidgets.QStyle.SP_FileDialogListView))
         add_channel_btn.clicked.connect(self.add_channel_dialog.open)
-        layout.addWidget(add_channel_btn, 0, 0, colspan=1)
+        layout.addWidget(add_channel_btn, 0, 1)
 
         self.tree = MoninjTreeWidget()
         layout.addWidget(self.tree, 1, 0, colspan=10)
 
+        self._file_menu = QtWidgets.QMenu()
+        self._add_async_action("Open configuration...", self.load_configuration)
+        self._add_async_action("Save configuration...", self.save_configuration)
+        self._menu_btn.setMenu(self._file_menu)
+
+    def _add_async_action(self, label, coro):
+        action = QtWidgets.QAction(label, self)
+        action.triggered.connect(
+            lambda: asyncio.ensure_future(exc_to_warning(coro())))
+        self._file_menu.addAction(action)
+
     def layout_widgets(self, handlers):
         for handler in handlers:
             handler.create_widget()
@@ -988,6 +1011,67 @@ class MonInjDock(QtWidgets.QDockWidget):
     def set_channels(self, handlers):
         self._channel_model.update(handlers)
 
+    def _get_widget_from_handler(self, uid):
+        if uid in self.dm.handlers_by_uid:
+            handler = self.dm.handlers_by_uid[uid]
+            handler.create_widget()
+            return handler.widget
+        else:
+            logger.warning("skipping moninj widget with uid {}:"
+                           " description incorrect/missing from device db".format(uid))
+            return None
+
+    def _connect_config(self, config):
+        out_config = []
+        for item in config:
+            if isinstance(item, dict):
+                out_widgets = []
+                for uid in item["widgets"]:
+                    widget = self._get_widget_from_handler(uid)
+                    if widget is not None:
+                        out_widgets.append(widget)
+                item["widgets"] = out_widgets
+                out_config.append(item)
+            else:
+                widget = self._get_widget_from_handler(item)
+                if widget is not None:
+                    out_config.append(widget)
+        return out_config
+
+    async def load_configuration(self):
+        try:
+            filename = await get_open_file_name(
+                self,
+                "Load configuration",
+                self._current_dir,
+                "PYON files (*.pyon);;All files (*.*)")
+        except asyncio.CancelledError:
+            return
+        self._current_dir = os.path.dirname(filename)
+        try:
+            configuration = pyon.load_file(filename)
+            connected_config = self._connect_config(configuration)
+            self.tree.clear()
+            self.tree.extend(connected_config)
+        except Exception:
+            logger.error("Failed to load moninj configuration", exc_info=True)
+
+    async def save_configuration(self):
+        try:
+            filename = await get_save_file_name(
+                self,
+                "Save configuration",
+                self._current_dir,
+                "PYON files (*.pyon);;All files (*.*)")
+        except asyncio.CancelledError:
+            return
+        self._current_dir = os.path.dirname(filename)
+        try:
+            configuration = self.tree.export_list()
+            pyon.store_file(filename, configuration)
+        except Exception:
+            logger.error("Failed to save moninj configuration", exc_info=True)
+
     async def stop(self):
         if self.dm is not None:
             await self.dm.close()